Enviornmental Conditions Report
~ Port~ 1 of Seattle TERMINAL 108 – ENVIRONMENTAL CONDITIONS REPORT FINAL For submittal to: Washington State Department of Ecology 3190 160th Avenue SE Bellevue, WA 98008 January 23, 2009 Prepared by: 200 West Mercer Street, Suite 401 Seattle, Washington 98119 Table of Contents 1.0 1.1 1.2 Introduction PROJECT BACKGROUND PURPOSE AND ORGANIZATION OF REPORT 1 1 4 2.0 Site Description 2.1 GENERAL PROPERTY DESCRIPTION 2.2 PHYSICAL AND ECOLOGICAL FEATURES 2.3 GEOLOGY AND HYDROGEOLOGY 2.3.1 Geology 2.3.2 Hydrogeology 2.4 INFRASTRUCTURE AND CONSTRUCTED SITE FEATURES 4 4 7 9 9 10 17 3.0 Property Ownership and Operational History 3.1 PRE-INDUSTRIAL HISTORY 3.2 DIAGONAL WAY SEWAGE TREATMENT PLANT 3.3 CHIYODA CORPORATION INTERNATIONAL OWNERSHIP (C. 1972-1980) 3.4 OWNERSHIP AND OPERATIONAL HISTORY (1980-2008) – EASTERN PARCEL 3.4.1 Port of Seattle Ownership (1980-1984) 3.4.2 Chevron USA Products Company Ownership (1984-1992) 3.4.3 Port of Seattle Ownership – Eastern Parcel (1992-1997) 3.5 OWNERSHIP AND OPERATIONAL HISTORY (1980-2008) – WESTERN PARCEL 3.6 CURRENT OPERATIONS AT T-108 21 23 23 28 29 29 29 34 35 36 4.0 T-108 Environmental Conditions and Investigation Information 4.1 ENVIRONMENTAL DATA SUMMARY FOR T-108 4.1.1 T-108 soil 4.1.2 T-108 groundwater 4.1.3 T-108 bank soil 4.1.4 T-108 seep data 4.2 RELEVANT INFORMATION FOR SURROUNDING PROPERTIES, ROADWAYS, AND OUTFALL SYSTEMS 4.2.1 Adjacent properties 4.2.2 Adjacent streets 4.2.3 Public outfalls 43 43 43 44 46 46 5.0 46 47 54 58 Potential Pathways of Contamination and Source Control Management 64 5.1 POTENTIAL PATHWAYS 64 5.1.1 Atmospheric deposition 64 5.1.2 Stormwater inputs (direct discharge) 64 5.1.3 Groundwater migration 65 5.1.4 Bank erosion 65 5.2 HISTORY OF THE DUWAMISH/DIAGONAL SOURCE CONTROL AREA 65 Port~ of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page i 5.3 5.4 5.5 SOURCE CONTROL MANAGEMENT TOOLS T-108 ONSITE POTENTIAL PATHWAYS OF CONTAMINATION AND SOURCE CONTROL OFFSITE POTENTIAL PATHWAYS OF CONTAMINATION 67 70 76 6.0 Conclusions and Recommendations 79 7.0 References 81 Appendix A Appendix B Appendix C Appendix D Appendix E Appendix F Port~ of5eattle Terminal-108 and Adjacent Property Photographic Log Historical Aerial Photograph Review Groundwater Monitoring Well and Boring Logs T-108 Analytical Information Adjacent Property Analytical Information T-108 Reference Documentation Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page ii List of Tables Table 1. T-108 groundwater and shoreline soil investigation monitoring well construction and water level summary 13 Table 2. Summary of relevant information for properties adjacent to T-108 48 Table 3. Summary of relevant information for street rights-of-way adjacent to T-108 55 Table 4. Summary of relevant information for outfalls adjacent to T-108 59 Table 5. Chemicals of concern in Duwamish/Diagonal SCA surface sediment (exceeding associated SMS criteria) 66 Table 6. Potential source control management tools for the subject property 67 Table 7. Potential onsite pathways of contamination and general source control information at T-108 72 Potential offsite sources of contamination and pathway information relative to T-108 77 Table 8. List of Figures Figure 1. T-108 timeline: ownership, operations, and environmental investigations 22 List of Maps Map 1. Terminal 108 location 2 Map 2. T-108 vicinity map 5 Map 3. Groundwater well and soil sampling locations 11 Map 4. Groundwater contour maps, Pacific Groundwater Group wells (June and September 2006) 15 Map 5 Stormwater drainage networks 19 Map 6. Historical site features 1938 – c. 1970, 1970s 25 Map 7. Historical site features 1980s, 1990s 31 Map 8. Historical site feature overlay 39 Map 9. Historical site feature overlay and previous sample locations 41 Port~ of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page iii Acronyms AGI Applied Geotechnology, Inc. APN assessor’s parcel number AST aboveground storage tank BBP butyl benzyl phthalate BEHP bis(2-ethylhexyl) phthalate bgs below ground surface BMP best management practice Boeing The Boeing Company BTEX benzene, toluene, ethyl benzene, and xylene CB catch basin CCI Container Care International CFC chlorofluorocarbon CFR Code of Federal Regulations Chevron Chevron USA Products Company Chiyoda Chiyoda Corporation International City City of Seattle ConGlobal ConGlobal Industries County King County cPAH carcinogenic polycyclic aromatic hydrocarbon CSL cleanup screening level CSO combined sewer overflow cy cubic yard EAA early action area EBI Elliott Bay Interceptor Ecology Washington State Department of Ecology EOF emergency overflow EPA US Environmental Protection Agency ESA environmental site assessment FBI Federal Bureau of Investigation GSA General Services Administration HPAH high-molecular-weight polycyclic aromatic hydrocarbon ICR independent cleanup report Lafarge Lafarge Canada, Inc. Port~ of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page iv LDW Lower Duwamish Waterway LDWG Lower Duwamish Waterway Group LPAH low-molecular-weight polycyclic aromatic hydrocarbon LUST leaking underground storage tank mgd million gallons per day mgy million gallons per year MLLW mean lower low water MTCA Model Toxics Control Act MT/yr million tons per year NPDES National Pollutant Discharge Elimination System PAH polycyclic aromatic hydrocarbon PCB polychlorinated biphenyl PGG Pacific Groundwater Group Pioneer Pioneer Construction Materials Company Port Port of Seattle ppm parts per million RCB right-of-way catch basin RCRA Resource Conservation and Recovery Act ROW right-of-way SCAP source control action plan SCSP source control strategy plan SD storm drain SMS Washington State Sediment Management Standards SPCC spill prevention control and countermeasure SPU Seattle Public Utilities SQG small-quantity generator SQS sediment quality standard STP sewage treatment plant SWPPP stormwater pollution prevention plan T-108 Terminal 108 T-106 Terminal 106 TEQ toxic equivalent TPH total petroleum hydrocarbons TPH-D diesel-range total petroleum hydrocarbons TPH-O oil-range total petroleum hydrocarbons Port~ of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page v TSCA Toxic Substances Control Act TSS total suspended solids USACE US Army Corps of Engineers UST underground storage tank VCP voluntary cleanup program VOC volatile organic compound WAC Washington Administrative Code WSLCB Washington State Liquor Control Board WWTP wastewater treatment plant Port~ of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page vi 1 Introduction The Lower Duwamish Waterway (LDW) is an approximately 5.5-mile waterway located in Seattle, Washington. In 2001, the US Environmental Protection Agency (EPA) added the heavily used industrial waterway to the nation’s Superfund list. Contaminants identified in the waterway’s sediments that led to its listing include polychlorinated biphenyls (PCBs), polycyclic aromatic hydrocarbons (PAHs), various metals, and phthalates. These identified contaminants may threaten both humans and wildlife. The Port of Seattle’s (Port) Terminal 108 property (T-108) is located on the eastern shore of the LDW, just upstream of Harbor Island (Map 1). T-108 has been owned by or leased to various entities during its history of industrial and commercial use. For the purposes of this report, T-108 will be referred to as the subject property. During the course of recent investigations on the waterway, the subject property, along with neighboring properties, has been identified as a property of potential interest for source control with respect to the LDW. In support of these ongoing investigation efforts, the Port is developing independently a source control strategy for the terminal property. To help develop and focus the strategy on potential source control issues at the subject property, the Port is preparing this comprehensive Environmental Conditions Report detailing property-specific investigation information along with the operational history and development of the property over the course of the last hundred years. This report’s conclusions and recommendations will assist in the development of a source control strategy for the subject property, to be discussed in future documentation. 1.1 PROJECT BACKGROUND In December 2000, EPA and the Washington State Department of Ecology (Ecology) entered into an Agreed Order on Consent with King County (County), the Port, the City of Seattle (City), and The Boeing Company (Boeing). The purpose of the order was for the completion of a remedial investigation and feasibility study (RI/FS) to address the waterway’s sediment contamination. Subsequent to signing of the agreement, the County, the City, the Port, and Boeing formed the Lower Duwamish Waterway Group (LDWG) to manage and coordinate the ongoing investigation and remediation strategy efforts. - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 1 Harbor I. 0.0 Terminal 108 Kellogg I. Slip 1 1.0 Slip 2 Slip 3 0 2. 4.0 Slip 6 Upper Turning Basin Navigation channel River mile Lower Duwamish Waterway 5.0 Prepared by CEH, 12/06/07; MAP #3120; W:\Projects\06-08-14-01 Marine Environmental Source Control\Data\GIS\T-108 3. 0 Slip 4 Wind Ward environmental LLC ± 0 0 0.25 0.5 0.5 Miles 1 Kilometers Map 1. Terminal 108 location FINAL Preventing recontamination to levels that exceed the Washington State Sediment Management Standards (SMS) (per Washington Administrative Code [WAC] 173-204) and the LDW sediment cleanup goals is the ultimate focus of Ecology’s source control strategy. The LDW source control program, under Ecology’s lead, is designed to identify and manage sources of contamination to LDW sediments in coordination with sediment remediation activities. This program provides the framework for identifying source control issues and implementing effective controls, potentially including various levels of remedial action. To support this effort, Ecology is preparing source control action plans and data gaps analysis reports to establish current environmental conditions and evaluate historical and ongoing sources of contamination. In 2003, seven candidate sediment sites for early action (subsequently referred to as early action areas [EAAs]) were identified in the LDW. One of the recommended EAAs, EAA 1, includes the adjacent Duwamish/Diagonal combined sewer overflow (CSO) and storm drain (SD) area on the east side of the LDW at the end of the Oregon Street right-of-way (ROW). The subject property borders these outfall locations to the south and directly abuts EAA 1. In December 2004, Ecology published a Source Control Action Plan (SCAP) for the Duwamish/Diagonal Way Early Action Cleanup Area (EAA 1) which strategized the approach to ongoing evaluation and control of sources of contamination to the sediment area. In that strategy document, the subject property was included as a property of potential concern relative to identified sediment contamination associated with EAA 1 (Ecology 2004). In June 2008, Ecology published several property reviews for individual properties of potential concern relative to EAA 1, including T-108, T-106 West (T-106W), T-106 Northwest (T-106NW), T-106 East (T-106E), and Federal Center South. Relevant information from Ecology’s property reviews is included in the subsequent sections of this report. Ecology has requested that the Port provide documentation of the subject property’s environmental conditions and develop a long-term Source Control Strategy Plan (SCSP). The SCSP will be implemented and managed on a independent basis. Work to be performed at the site, including any potential remedial activities or engineered mitigation measures, will be managed as outlined under the Model Toxics Control Act (MTCA), the National Pollutant Discharge Elimination System (NPDES) requirements, and other established regulations. This Environmental Conditions Report will help establish the basis for the development, implementation, and management of the SCSPs for the subject property. The SCSPs will take into consideration current operations and the recommendations of this report. The SCSPs will also consider remedial action alternatives, if appropriate, based on the conclusions of the environmental conditions documentation and the approaches deemed to be most effective for the potential issues at the subject property. Any remedial action at the subject property will be completed as an independent - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 3 remedial action in accordance with Ecology's MTCA. However, the Port acknowledges that Ecology may consider an Agreed Order for the subject property in the future. 1.2 PURPOSE AND ORGANIZATION OF REPORT The purpose of this report is to present and discuss the subject property’s relevant operational and development history, evaluate existing environmental data, and identify potential source control issues, focusing on long-term source control strategy efforts at T-108. This Environmental Conditions Report is organized as follows: Section 2.0, Site Description Section 3.0, Property Ownership and Operational History Section 4.0, Environmental Conditions and Source Information Section 5.0, Potential Pathways of Contamination and Source Control Management Section 6.0, Conclusions and Recommendations Section 7.0, References 2 Site Description T-108 is located at 4525 Diagonal Avenue S in Seattle, Washington (Map 2). It is owned by the Port of Seattle and currently leased to ConGlobal Industries (ConGlobal), an international company that operates container and chassis depots. T-108 is located on the LDW which bounds the property to the west. It is bounded to the east by a King County pumping station and E Marginal Way S, to the west by the LDW, to the south by Diagonal Avenue S and the Federal Center South facility, and to the north by the Oregon Street ROW, Terminal 106 W (T-106W), and the Washington State Liquor Control Board (WSLCB) facility. 2.1 GENERAL PROPERTY DESCRIPTION T-108 currently consists of two parcels totaling approximately 20 acres. The Western Parcel (Assessor’s Parcel Number [APN] 7666700510) is approximately 9 acres in size, and the Eastern Parcel (APN 7666700515) is approximately 11 acres in size (King County 2008). Currently, ConGlobal leases both parcels of the subject property: the Eastern Parcel is used as a container storage facility and truck chassis storage and repair area, and the Western Parcel is used as a chassis lay-down area. - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 4 S Nevada St SD / S Nevada St Terminal 106 West S Idaho St Washington State Liquor Control Board Capped February 2004 Terminal 108 King County Pump Station Eastern Parcel E Marginal Way S S Oregon St ROW / Duwamish/Diagonal CSO/SD / Duwamish EOF Capped February 2004 Former Diagonal Ave STP outfall / Western Parcel Port of Seattle SD / D Port of Seattle Public Access Thin-layer Cap February 2005 Habitat Mitigation Area S ve A al on g ia Federal Center South Diagonal Ave S SD / Building 1203 General Services Administration SD / Building 1202 Prepared by CEJ, 07/08/08; MAP #3288; W:\Projects\06-08-14-01 Marine Environmental Source Control\Data\GIS\T-108 / Outfalls Terminal 108 Sediment cap areas Tax parcel boundary Navigation channel WA Liquor Control Board / / WA Liquor Control Board WA Liquor Control Board / Wind Ward ± environmental LLC 0 0 0.05 0.05 0.1 Miles Photo source: "USGS High Resolution Orthoimage, Seattle/Tacoma, WA", United States Geological Survey, 2003. Distributed by King County GIS. Photo date 06/11/2002. Map 2. Terminal 108 vicinity and current site layout 0.1 Kilometers FINAL T-108 has been used by several parties for a variety of purposes since its development in the early 20th century. Detailed information on the subject property’s ownership and operational history is discussed in Section 3.0. A timeline that provides a visual presentation of the property’s ownership, operation, and environmental-related investigation history is also provided in Section 3.0. Brief highlights of the ownership history of the T-108 property include: • Diagonal Avenue S sewage treatment plant (STP) – Operated by the City of Seattle from 1938 to 1962 and then by King County Metro from 1962 to 1969 in the central portion of T-108 Eastern Parcel. • Chiyoda Corporation International (Chiyoda) owned the property in the mid-1970s; EPA and the US Army Corps of Engineers (USACE) controlled the property for a portion of the Chiyoda ownership period. • In the early 1980s, the T-108 property was subdivided for the first time when the Port acquired the property; the Port maintained ownership of the Western Parcel and sold the Eastern Parcel to Chevron in approximately 1984. The Port subsequently repurchased the Eastern Parcel in 1992. • The Lafarge Cement Company leased the Western Parcel from 1989 to 1998; Lafarge constructed and operated a bulk cement terminal on the property. • In the mid-1990s, the Eastern Parcel was redeveloped for use as a container storage and transfer yard by Container Care International (CCI). CCI is a predecessor to ConGlobal Industries. Presently the majority of T-108 is operated as a container storage facility by ConGlobal Industries. The primary container storage area is located on the Eastern Parcel of the property, and portions of the Western Parcel are used for chassis lay-down and storage. A Port of Seattle public access and habitat mitigation area is located along the southern shoreline of the Western Parcel, adjacent to the LDW. The park area is one of approximately 12 habitat mitigation areas along the LDW shoreline, and public access to the site is provided in accordance with the Port’s public access plan (Port of Seattle 1985a). Select photographs of the subject property used as reference for the following sections are included in Appendix A. Appendix B includes copies of historical aerial photographs of the immediate vicinity of the T-108 that were used as a resource for this discussion. 2.2 PHYSICAL AND ECOLOGICAL FEATURES T-108 is located in what was once a tidal marsh area associated with the Duwamish River delta. Much of this marsh area was filled in the early 1900s during engineering of the LDW. The present topography of the site is generally flat with gradual slopes downward to the east and northwest, away from the central part of the site (Port of - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 7 Seattle 1992a). The average ground surface elevation is approximately 19 feet mean lower low water (MLLW). The majority of the container yard on the Eastern Parcel of T-108 is paved, however some portions are covered with gravel (Map 2). The southern half of the Western Parcel of T-108 is paved or covered with gravel. The paved and graveled areas on the Western Parcel were formerly used as part of the Lafarge bulk cement terminal and as a parking lot associated with the Diagonal Avenue S STP (discussed in Section 3.5). Currently, a thick layer of soil covers much of the paved/graveled portion of this parcel, and ConGlobal uses some of the area for chassis lay-down and storage (Appendix A, Photos 5, 7, and 8). The majority of the northern portion of the Western Parcel is unpaved and is covered with vegetation including grass, low lying shrubs (predominantly blackberries) and trees (Appendix A, Photo 6). The T-108 shoreline is approximately 1,200 ft (or 0.23 mi) long. The bank elevation of the northern and central portions of the shoreline varies from 0 to 10 ft (Port of Seattle Datum) (Port of Seattle 1993). The bank elevation of the southern portion of the shoreline, which includes the mitigation area, varies from approximately 4 to 18 ft (Port of Seattle Datum). The northern and central portions of the T-108 shoreline are armored with riprap, gravel, and other materials (Appendix A, Photo 15). Along the southcentral portion of the shoreline, to the north of the mitigation area, the shoreline is partially armored with riprap and a wooden bulkhead which runs parallel to the shoreline. The bulkhead is not well-anchored and is slanted away from the shoreline (Appendix A, Photos 12 and 13). Within the park and mitigation area, the T-108 shoreline is primarily unarmored, with the exception of gravel (habitat mix) scattered along the perimeter (Appendix A, Photo 10). Two outfalls points are located along the T-108 shoreline boundary. One is an active storm drain outfall that drains the southern portion of the Western Parcel (Port of Seattle outfall 2225 on Map 2), located in the vicinity of the wooden bulkhead (Appendix A, Photo 13). The second is an abandoned outfall formerly associated with the Diagonal Avenue S STP, located to the north of the active outfall (former Diagonal Avenue S STP outfall 2002 on Map 2; Appendix A, Photo 14). In addition, a wooden box frame structure in an extreme state of disrepair was observed in approximately the middle of the shoreline. The former purpose of this structure is not known. The intertidal portion of the shoreline (ranging between elevations 5 and -10 MLLW depending on location along the subject property’s shoreline) is composed predominately of mudflats that gently incline toward the navigation channel. Debris including wood, metal, brick, plastic, glass, and wiring is visible in the shoreline banks and in the mudflat area. The T-108 public access and habitat mitigation area was constructed in the late 1980s by excavating the bank shoreline. It is approximately 1 acre in size and includes approximately 420 ft of shoreline, at an elevation ranging from 8 to 18 ft. A vegetated - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 8 buffer surrounds a U-shaped mudflat area that extends into the LDW (Appendix A, Photos 9 and 10). A buoy line is present along the mouth of the mitigation area to prevent debris from washing into the site. Vegetation within the public access and mitigation area is routinely maintained by Port maintenance crews and appears to be healthy, and the area provides fish and wildlife habitat. The public access area extends to a public parking area located at the end of Diagonal Avenue S which also includes a lawn area, picnic tables, a launch for hand-carried boats, and interpretive signage. Existing trees on the eastern perimeter of the public access area provide visual screening from the rest of T-108 and E Marginal Way S (Appendix A, Photo 9). 2.3 GEOLOGY AND HYDROGEOLOGY The following section provides a brief overview of the subsurface conditions at the subject property and discusses the basics of the property’s hydrogeological features. A more detailed discussion is available in the various site investigation reports cited as reference throughout the section. 2.3.1 Geology T-108 is located within the Duwamish River valley which was formed approximately 15,000 years ago by the retreat of the glaciers that covered the Puget Sound region (Booth and Herman 1998). Sediment originating from the Osceola mudflow off Mt. Rainier as well as other sources from surrounding mountains and hills was carried into the valley by the ancestral White River over a period of several thousand years. Between 1913 and 1917, the LDW was created by dredging a channel for the waterway and filling adjacent floodplain areas. Fill was placed using both mechanical and hydraulic methods, and consisted primarily of dredge spoils produced during channelization of the LDW. Fill materials may have included soil and other geologic materials that were a by-product of other land development projects inland from the Duwamish River, such as re-grading projects, as well as other waste materials of the time including refuse. Glacial scouring, natural sedimentation, earthquakes, and human engineering projects have all influenced the geology of T-108 and surrounding areas. Numerous subsurface investigations have been completed which have identified the various hydrogeologic components that comprise the subject property. A review of soil borings logged during development of monitoring wells on the property indicate that the shallow hydrostratigraphic units present at T-108 consist of fill materials underlain by tidal marsh deposits (Pacific Groundwater Group 2007a). The fill material was reported as a predominantly heterogeneous deposit extending from the ground surface approximately 10 to 15 feet to the top of the tidal marsh deposits (Pacific Groundwater Group 2007a; Dames & Moore 1988). The upland fill is described as brown to black, loose to medium dense, moist to wet, very fine to medium-grained sand and silty sand (AGI 1992a; Pacific Groundwater Group 2006c). The fill includes zones of significant organic content, localized cementation, and variations in percentage of silt and gravel content. During subsurface investigation at the property, the fill was - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 9 usually identified by the presence of significant volumes of sand and anthropogenic materials, with a lack of peaty material. The fill potentially consists of hydraulic fill, dredge spoils from the former river channel, and potentially some volume of sewage sludge (Port of Seattle 1992a). During advancement of monitoring wells on the property in 2006, tidal marsh deposits were distinctive and easily identified as compact silts intermixed with peaty grass and root materials (Pacific Groundwater Group 2006c). The tidal marsh deposits were described as compact sandy silt with peat (organic material). Outcrops of tidal marsh deposits are visible along the shoreline near mean sea level (Appendix A, Photo 14). In the observed outcroppings, the deposits consist of sandy silt with a high organic content (peat). The tidal marsh deposits underlie the fill material at T-108 from between 10 to 20 ft below ground surface (bgs). These deposits are brown to gray, very soft to soft, moist to wet, and composed of organic silts and clays. Along the T-108 shoreline, various outcrops of fill that lacked peaty material was identified. The fill was described as silty sand predominantly gray in color containing significant amounts of sand and anthropogenic materials. Tidal marsh outcrops were also identified near mean sea level along the shoreline. These deposits are generally light brown in color and peat material is often visible. Boring logs from past subsurface investigations for the T-108 subject property are contained in Appendix C. Several previous investigations have identified and described the alluvial deposits that underlie the marsh deposit layers. The alluvial deposits represent remnants of the former Duwamish River channel, of which the subject property was a part prior to development of the LDW. The alluvial materials range from black, loose, wet, fine grained sands to gray, medium stiff, wet, and very fine grained sandy silts (Pacific Groundwater Group 2006c). 2.3.2 Hydrogeology The fill layer discussed in Section 2.3.1 is the uppermost water-bearing unit of the subject property. This unit is often referred to as the shallow aquifer in investigation documentation. Monitoring wells installed on T-108 have been completed in this shallow aquifer unit (Appendix A, Photo 6 is a representative groundwater well at T-108); groundwater is typically observed in this unit at approximately 10 ft bgs. Groundwater near the LDW within this shallow unit is tidally influenced. Groundwater flow patterns in the shallow aquifer have been observed over the course of several years of investigation; groundwater appears to flow radially from a relative high in the northcentral portion of the subject property (roughly between groundwater monitoring wells PGG-1 and PGG-2 on Map 3). - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 10 T-106 W Washington State Liquor Control Board H ! ! H Duwamish/Diagonal CSO/SD J H ! H ! S Oregon St ROW H ! $ + Duwamish EOF J 5 ! 5 ! 5 ! 5 ! 5 ! 5 ! 5 ! 5! 5 PGG-2 ! 5 ! 5 ! 5 ! ! 5 Western Parcel ! 5 5 ! 5 5! ! 5 ! 5 ! 5 ! Capped February 2004 H ! Eastern Parcel 5 ! ! 5 5 ! 5 ! ! 5 5 ! 5 ! !! 5 5 5 ! 5 ! 5 ! 5 ! ! 5 5 ! ! 5 5 ! 5 ! 5 ! 5 ! 5 ! 5 !! 5 5 ! 5 ! 5 ! 5 ! 5 ! 5 ! 5 ! 5 ! 5 ! 5 ! 5 ! 5 ! 5 ! 5 ! 5 ! 5 ! King County Pump Station 5 ! 5 ! 5 ! 5 ! H ! PGG-1 5 ! 5 ! PGG-5 5 ! 5 ! H ! E Marginal Way S Capped February 2004 PGG-6 5 ! PGG-4 5 ! # * Former Diagonal Ave STP outfall J PGG-3 5 ! 5 ! ! 5 5 ! 5 ! o ag Di 5 ! eS Av l na ! Soil sampling locations H 5 Monitoring wells ! Prepared by CEJ, 071009; MAP # 3356; W:\Projects\06-08-14-01 Marine Environmental Source Control\Data\GIS\T-108 J Outfalls Terminal 108 Port of Seattle SD ! ? J Sediment cap areas Tax parcel boundary Port of Seattle Public Access 5 ! Thin-layer Cap February 2005 Wind Ward environmental LLC Navigation channel Habitat Mitigation Area ± PGG-7 Federal Center South 0 0 Photo source: "USGS High Resolution Orthoimage, Seattle/ Tacoma, WA", United States Geological Survey, 2003. Distributed by King County GIS. Photo date 06/11/2002. 400 100 800 Feet Map 3. Groundwater well and soil sampling locations 200 Meters FINAL Table 1 provides a summary of water level measurements over time for PGG wells 01 through 07 at the subject property. These seven wells are the most recently completed wells at the property and analytical information from these well locations is considered the most representative of current conditions at the subject property relative to source control. A groundwater contour map based on levels from these wells locations is provided as Map 4. Successive mapping of the groundwater contours at the subject property derived from years of investigations have indicated that groundwater in the shallow aquifer in the Western Parcel generally flows toward the LDW. However, in the Eastern Parcel, groundwater moves from a relative high in the center of the Eastern Parcel radially in all directions, but predominately to the north and east. Table 1. T-108 groundwater and shoreline soil investigation monitoring well construction and water level summary PARAMETER PGG-1 PGG-2 PGG-3 PGG-4 PGG-5 PGG-6 PGG-7 Ecology unique ID APQ 005 APQ 002 APQ 004 APQ 006 APQ 007 APQ 003 APQ 001 Installation dates 6/6/2006 6/5/2006 6/5/2006 6/6/2006 6/6/2006 6/5/2006 6/5/2006 Development volume, gallons (approx.) 1.75 6.25 35 <0.5 15 25 20 Bailed dry at, gallons (approx.) 1 3.75 NA <0.5 NA NA NA Northing 209009.5 208857.2 208484.3 208550.9 208967.95 208572.9 208171.9 Easting 1267978 1267451 1267595 1268180 1267349.68 1267423 1267534 Monument elevation (north rim) 15.4 19.25 13.68 15.59 23.45 15.53 12.59 Measuring point (PVC) elevation 15.04 18.82 13.26 15.21 22.81 15.03 12.24 Top of screen elevation 11.9 15.8 10.2 12.1 12.6 12 8.6 Bottom of screen elevation 5.4 8.8 2.7 5.6 2.6 3 2.1 Top of screen, feet bgs 3.5 3.5 3.5 3.5 8 3.5 4 Bottom of screen, ft bgs 10 10.5 11 10 18 12.5 10.5 Depth of borehole, ft bgs 10.5 14 13.5 10.5 20 13 14 9:19 a.m. 10:12 a.m. NA 9:33 a.m. 10:22 a.m. 10:04 a.m. 9:45 a.m. 8.84 7.39 NM 8.34 17.9 9.17 5.99 General Coordinates Elevations a b Depths Round 3 Water Level Snapshot – 2/19/07 Time of measurement Depth to water (ft bgs) Groundwater elevation b 6.2 11.43 NM 6.87 4.91 5.86 6.25 c 9:18 a.m. 10:12 a.m. NA 9:30 a.m. 10:24 a.m. 10:06 a.m. 9:42 a.m. 8.29 6.19 NA 7.83 5.73 6.41 7.34 Time of tide observation b Tide elevation 2 - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 13 Round 4 Water Level Snapshot – 5/29/07 Time of measurement Depth to water (ft bgs) Groundwater elevation b Time of tide observation Tide elevation b c 8:54 a.m. 9:35 a.m. NA 9:08 a.m. 9:25 a.m. 9:45 a.m. 10:01 a.m. 9.13 9.22 NM 8.96 18.93 9.69 6.74 5.91 9.6 NM 6.25 3.88 5.34 5.5 8:54 a.m. 9:36 a.m. NA 9:06 a.m. 9:24 a.m. 9:42 a.m. 10:00 a.m. 0.33 -0.46 NA 0.04 -0.31 -0.54 -0.68 a Horizontal datum: NAD 83/(91), Washington Coordinate System, North Zone, based on the published coordinate values of WSDOT Monument No. 3295 and WSDOT No. 3294 as published on the WSDOT Website during September 2006. b Vertical Datum: MLLW. Elevations (monument, measuring point, top of screen, bottom of screen) presented in this table are correctly reported to MLLW and should replace elevations incorrectly presented in the Interim Report (PGG, 2006). c Observed tide at Seattle Station ID 9447130 (ferry terminal) as reported by NOAA. bgs – below ground surface; NM – not measured, PGG-3 wellhead damaged before Round 3 ID – identification PVC – polyvinyl chloride - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 14 S Oregon St ROW / Duwamish EOF 5 PGG-5 PGG-1 5 ! 6 5 ! 8 PGG-2 King County Pump Station 5 ! 9 PGG-6 5 ! Former Diagonal Ave STP outfall 7 PGG-4 5 ! 6 / PGG-3 5 ! Eastern Parcel Western Parcel Port of Seattle SD ve lA a on ag i D ? / ? S Port of Seattle Public Access 5 ! Habitat Mitigation Area PGG-7 5 Monitoring wells ! / June 2006 Outfalls Groundwater elevation contour (dashed where inferred) Groundwater flow direction / S Oregon St ROW 4 Duwamish EOF 5 ! ? PGG-5 9 PGG-1 Groundwater elevation Approximate historical shoreline 5 ! Terminal 108 ? PGG-2 5 ! Photo source: "USGS High Resolution Orthoimage, King County Geological Seattle/Tacoma, WA", United States Pump Station Survey, 2003. Distributed by King County GIS. Photo date 06/11/2002. ? ? 6 PGG-6 / 5 5 ! PGG-4 5 ! 5 PGG-3 ? 5 ! Eastern Parcel ? Western Parcel Port of Seattle SD / D Prepared by CEJ, 070908; MAP # 3352; W:\Projects\06-08-14-01 Marine Environmental Source Control\Data\GIS\T-108 Navigation channel ? 7 Former Diagonal Ave STP outfall Tax parcel boundary ? ve lA a on iag S Port of Seattle Public Access 5 ! Habitat Mitigation Area PGG-7 September 2006 0 Wind Ward environmental LLC ± 0 100 20 200 Feet 40 Meters Scale is the same for each inset map Map 4. Groundwater contour maps, Pacific Groundwater Group wells (June and September 2006) FINAL Historical aerial photographs of the subject property (see Appendix B) identify a former tidal channel that extended from the LDW, along or adjacent to the north of the present day S Oregon Street ROW, and into the subject property (AGI 1992a). It is unclear where the channels exact terminus existed, but some of the aerial photographs indicate it may have extended to E Marginal Way S and potentially received runoff from the street and areas farther east. One source reported that the channel received untreated sewage discharge from small sewer system that was located to the northeast of T-108 (King County et al. 2005a). The aerial photograph from 1946 (Appendix B) shows a facility located to the northeast of T-108 along Diagonal Avenue S that may represent this reported sewer system; however, this could not be confirmed during the course of this investigation. The tidal channel entered the subject property along the eastern boundary and extended through the northeast portion of the Eastern Parcel, passing outside of the property boundary near the center of the northern boundary of the parcel (near PGG-1; see map 3 for reference). Based on available information, the channel was likely filled between 1962 and 1976 (Pacific Groundwater Group 2006a); the channel was most likely backfilled when the Duwamish/Diagonal CSO/SD stormwater and sewer lines were installed in 1966 and 1967 (King County et al. 2005a). Assuming that coarse-grained materials were used as backfill, the relic channel may be locally influencing groundwater flow in the shallow aquifer unit by providing a preferential pathway for flow. Ultimately the discharge point for this flow path is most likely the LDW, near the present day location of the Duwamish/Diagonal CSO/SD and the Duwamish emergency overflow (EOF). 2.4 INFRASTRUCTURE AND CONSTRUCTED SITE FEATURES Current T-108 site features are associated with the existing container storage and maintenance facility on the Eastern Parcel and a former parking lot and bulk cement terminal on the Western Parcel, plus areas of chassis and miscellaneous material storage. The container storage and maintenance facility on the Eastern Parcel includes a paved and graveled container storage yard, a paved maintenance area, and access roadways and railway spurs for loading and unloading cargo. In total, approximately nine acres of paved area are used for cargo container storage operations and approximately five acres are graveled (the nine acres of paving includes areas in the S Oregon Street ROW and T-106W not included in the acreage of the subject property). A four-lane entry extends from Diagonal Avenue S into the southern portion of the Eastern Parcel (Map 2). Access to the northern portion of the T-108 cargo yard can be gained from the Diagonal Avenue S ROW. The T-108 container storage and maintenance facility is linked to the adjoining T-106W, located to the north, by an access roadway extending the S Oregon Street ROW. An office trailer is located in the southeast corner of the maintenance yard in the Eastern Parcel but no permanent structures have been constructed on the Eastern Parcel. The Eastern Parcel is - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 17 surrounded by chain-linked fencing and light posts are dispersed throughout the container yard. A network of storm drainage lines, catch basins, manholes, and oil/water separators support drainage for the paved and graveled areas of the Eastern Parcel. The drainage system was installed in 1993 by the Port when the Port redeveloped the property for use as a container storage yard. The drainage system consists of City of Seattle-approved catch basins in a 100-ft by 150-ft grid pattern. Lines of highway grade perforated polyethylene pipe were installed beneath the areas of gravel during redevelopment of the property to collect stormwater that infiltrates in the areas where the cargo containers are stored. The perforated pipes are located approximately 2.5 ft bgs (note that the highest groundwater level measured at T-108 in 2007 was 5.99 ft bgs [Table 1]); therefore, groundwater is not expected to infiltrate the perforated piping). The perforated pipes interconnect with a combination of 18- and 24-inch-diameter pipes that collect stormwater runoff in the paved areas supported by the catch basins. All stormwater collected in the Eastern Parcel is routed through an approved oil/water separator prior to discharge into the Duwamish/Diagonal SD piping beneath the S Oregon Street ROW. This piping ultimately discharges into the LDW 100 ft northwest of the subject property. Surface runoff from the Eastern Parcel tends to collect in the eastern portion of the site (within the area of the maintenance yard) which is topographically lower than the remainder of the property (Pacific Groundwater Group 2006c). ConGlobal maintains an industrial stormwater NPDES permit (No. SO3-010569) and has prepared a stormwater pollution prevention plan (SWPPP) to manage stormwater discharges to the Duwamish/Diagonal CSO/SD system. Additional information on the NPDES permit and SWPPP is included in Section 3.6. Improvements on the Western Parcel of T-108 are primarily associated with its former uses. The southern portion of the Western Parcel was paved in the early 1960s for use as a parking lot (Port of Seattle 1988). A drainage system consisting of catch basins and a storm drain (Port outfall 2225) was also installed at this time to drain stormwater from the parking lot (Map 5). In the early 1990s, Lafarge Canada, Inc. (Lafarge) installed a bulk cement terminal on the Western Parcel. The terminal was installed on existing paved areas (a former parking lot) which drained to an existing SD outfall. A catch basin was installed by Lafarge for the truck wash-down area; this catch basin was plumbed to the sanitary sewer (Port of Seattle 1988). The paved areas and catch basins, as well as remnants of the truck wash-down area, remain on the Western Parcel. In addition, Lafarge constructed a pier and pneumatic conveyor system offshore of T-108 in approximately the center of the shoreline. These features are still present although not currently in operation (Map 2). - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 18 T-106 W Capped February 2004 Washington State Liquor Control Board S Oregon St ROW Duwamish/Diagonal CSO/SD J J Duwamish EOF ! ( ! ( ! ( Area of surface drainage and infiltration Western Parcel ! ( # # PVC perforated drain field Eastern Parcel King County Pump Station ! ( ! ( E Marginal Way S # PVC perforated drain field Capped February 2004 ! ( ! ( Former Diagonal Ave STP outfall J ! ( D o iag S ve A l na # Cleanout J ! ( Manhole ! ( Prepared by CEJ, 071009; MAP # 3356; W:\Projects\06-08-14-01 Marine Environmental Source Control\Data\GIS\T-108 Port of Seattle SD J Port of Seattle Public Access Outfalls Catch basin Drainage line Terminal 108 Sediment cap areas Tax parcel boundary Navigation channel Thin-layer Cap February 2005 Wind Ward environmental LLC ± Habitat Mitigation Area Federal Center South 0 0 Photo source: "USGS High Resolution Orthoimage, Seattle/ Tacoma, WA", United States Geological Survey, 2003. Distributed by King County GIS. Photo date 06/11/2002. 400 100 800 Feet Map 5. Stormwater drainage networks 200 Meters FINAL A railroad spur, approximately 1,100 feet long, spans both the Eastern and Western Parcels of T-108. The spur extends from the southern property boundary and crosses Diagonal Avenue S before joining the existing Union Pacific Railroad track on the south side of Diagonal Avenue S. On T-108, the spur extends west and north to a loading platform in the northwest corner of the Western Parcel. On the Eastern Parcel, the rail spur runs along the boundary between the two parcels and terminates near the northern property border. The rail spur is not currently in use. Chain link fencing borders the majority of T-108 (both the Eastern and Western Parcels). 3 Property Ownership and Operational History The area currently comprising T-108 was created from the flood plain of the Duwamish River between 1913 and 1917, at the time of construction of the LDW; however, based on historical aerial photographs, the site was otherwise undeveloped as of 1936 (Appendix B). The first documented development and use of the site occurred in 1938 when the property was developed as the Diagonal Avenue S STP. Over the years the property has been used for various industrial purposes and has had several different owners and operators. Since 1980, ownership and operation of the property has been split between two parcels, an Eastern Parcel and a Western Parcel (Map 2). Both parcels are currently owned by the Port. The Eastern Parcel is approximately 11 acres in size and the Western Parcel is approximately 9 acres in size. Information in this section is derived from documents on file at Ecology and the Port, as well as historical documentation of the Diagonal Avenue S STP (Brown and Caldwell 1958), documents prepared in association with the Duwamish/Diagonal CSO/SD sediment area cleanup, and documents prepared as part of the source control strategy for the LDW. Information from documentation on site use at T-108 prior to the Port’s ownership period (beginning in 1980) is included when available. Several of the documents reviewed for information on property development and use were planning documents prepared for the purposes of acquiring permits. In some cases it is unknown whether all planned development activities were completed. Several historical sources provided conflicting or incomplete information. The property ownership and operational history presented for T-108 in this report are intended to be as complete and accurate as possible; however some inaccuracies and uncertainties may be present and are identified accordingly. Figure 1 provides a visual timeline of the subject property’s ownership, operational, and environmental investigation history. - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 21 1980: Port purchased property and sold eastern parcel to Chevron; property ownership and use split between eastern and western parcels 1977: berthing area dredged along northern shoreline Unknown No known site use or additional development Site undeveloped I Owner Tenant Qj . 1990: Land farming conducted I 19805 Y 0 1 1 1 2 1 3 1 4 1 51 6 1 7 1 8 1 9 o Port of Seattle Port of Seattle 19905 I 1 1 2 1 3 1 4 1 5 1 6 1 1 81 9 Chevron USA Products Co. Chevron USA Products Co. U IV Cl. .. ... Site operations and alterations I: GI Temporary storage of cargo containers Soil stockpiling and equipment storage III IV W "i Environmental investigations Owner Tenant Metro KC City of Seattle Diagonal Avenue S sewage and wastewater treatment plant 7 Port of Seattle 1 20005 o 1 1 12 13 1 4 15 16 Port of Seattle Container Care International I Site redeveloped asa cargo yard; several site upgrades Installed 7 ;> I ConGloballndustries Cargo storage and transport and chassis repair yard Soil and groundwater I~ investigations in 2006 and 2007 Soil and groundwater Soil sampling associated with Soil and groundwater investigations in 1981 and 1984 land farming activities in 1990 investigations in 1990-1992 Port of Seattle Lafarge Canada Inc. Port of Seattle 1 I 18 19 1 Port of Seattle CCI IConGlobal > ~ IV Cl. . ... I: GI Site operations and alterations Property vacant except for temporary storage of large containers Bulk cement transshipment facilty operated by Lafarge Property vacant Used by CCI/ConGlobal for chassis storage III ~ Environmental investigations Soil and groundwater investigations in Soil and sediment investigations Soil and groundwater Soil and groundwater I ~ixturesa~sociatedwit~ installed along southern shoreline 11989: bulk cement transshipment facility constructed, including silos and pier 1 Figure 1. T-108 timeline: ownership, operations, and environmental investigations Port~ of Seattle I~ in late 1980$ associated with invesligations in investigations in 2006 and 2007 199().1992 1981 and 1984 habitat mitigation area construction 4 4 0 1 1 1 2 1 3 1 1 516 I 7 1 8 1 9 01112131 151 6 1 7 1 819 o 1 1 1 2 1 3 1 4 1 5 1 6 I 7 1 8 1 9 1 19805 200~ I I~ 1990, c. 2006: ReNu Recycling leased Early 1990.: pubic acce.s I 1985: Pioneer Construction Co. I I Lafarge cement facility removed portion of property for storage I improvement. to mitigation area; temporary aggregate storage I approx. 0.5 ac of asphalt removed I; 1989: Habitat mitigation project Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 22 3.1 PRE-INDUSTRIAL HISTORY Until the 1850s, the Duwamish River and surrounding areas supported fishing, hunting, and trapping activities of various Native American Tribes. Historically, the Black, Green, and White Rivers all contributed to the flow of the Duwamish River, with the Black and Green Rivers being tributaries to the White River, which was tributary to the Duwamish. The original Duwamish drained an area of approximately 1,640 square miles as it meandered through grasslands, floodplains, wetlands, and tidal marshes prior to emptying into Elliott Bay. People of European descent arrived in the region in the 1850s and began clearing the shoreline and draining the adjacent freshwater and tidal marshes to facilitate farming activities. Logging emerged as a profitable venture, and docks and shipping infrastructure were built along the banks of the Duwamish. Because flooding in lowlying areas remained a concern in the early 1900s, levees and dams were installed to control water flow. Additional efforts to control river flooding led to several changes in the hydrology of the Duwamish River. The White River was diverted to the Puyallup River, the Cedar River was rerouted to flow into Lake Washington, and the Black River was reduced to a small stream with the construction of the Lake Washington Ship Canal and the resulting lowering of the water level in Lake Washington. The Green River remained as the only tributary to the Duwamish River. Between 1913 and 1917, the Duwamish River was channelized and dredged to form the LDW. The land on which T-108 now exists was once tidal marsh that was reclaimed through the placement of fill materials during this time period (AGI 1992b, citing Dames and Moore 1981). Channelization and dredging of the river increased the levels of industrialization of the area as berthing of large ocean-going vessels became possible. Commercial interest of the waterway’s shoreline expanded, and residential areas sprung up in what had been farmland adjacent to the river. The first known use of the T-108 property was as the Diagonal Avenue S STP, owned and operated by the City of Seattle until 1962. The plant began operations in 1938 (Ecology 2004a). Documentation regarding the use of the T-108 property prior to 1938 has not been identified. 3.2 DIAGONAL WAY SEWAGE TREATMENT PLANT From 1938 to 1962, the City of Seattle operated the Diagonal Way STP on the current location of the T-108 subject property. Between 1962 and 1969, Metro assumed operation of the facility and made improvements to the plant (King County et al. 2005a). This facility had the capacity to receive eight million gallons of sewage and stormwater per day (mgd) and was the primary sewage treatment and discharge facility for the industrialized and downtown portions of the City of Seattle. The location of the treatment plant is shown on Map 6 (approximate locations of major facility features) and in aerial photos from 1946, 1953, 1961, and 1970 (Appendix B). - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 23 S Oregon St ROW Duwamish EOF Approximate boundary of sewage treatment plant Surface ponds Surface ponds King County Pump Station Western Parcel Eastern Parcel Terminus of former drainage channel unknown Surface ponds Pump house Digesters Former Diagonal Ave STP outfall Clarifiers Control house Sludge drying beds Parking area ve lA a on ag i D Port of Seattle SD S Historical conditions from 1938 - c.1970 S Oregon St ROW / Duwamish EOF Dredge material stockpile from 1977 Chiyoda event Approximate location of PCB sediment and sludge disposal/ treatment area re: Slip 1 PCB spill 1975 Western Parcel King County Pump Station Eastern Parcel Former Diagonal Ave STP outfall / h g Trees Parking area Port of Seattle SD / Prepared by CEJ, 070908; MAP # 3352; W:\Projects\06-08-14-01 Marine Environmental Source Control\Data\GIS\T-108 D ve lA a on iag S / Outfalls Railroad spur Approximate historical shoreline Terminal 108 Tax parcel boundary Navigation channel Historical conditions in the 1970s Photo source: "USGS High Resolution Orthoimage, Seattle/Tacoma, WA", United States Geological Survey, 2003. Distributed by King County GIS. Photo date 06/11/2002. Location of historical features are approximate. 0 Wind Ward environmental LLC ± 0 100 20 200 Feet 40 Meters Map 6. Historical site features 1938 – c. 1970, 1970s FINAL Treatment facilities comprising the treatment plant included two large clarifiers and two digesters located in approximately the center of the subject property, glass-covered sludge drying beds to the west of the clarifiers and digesters, a control house adjacent to the east of the clarifiers and digesters, and a pump house on the eastern portion of the property (TAMS 1992; Brown and Caldwell 1958) (Map 6; Appendix B – 1946 aerial). The pump house associated with the Diagonal Avenue S STP is different from the current King County pumping station located adjacent to and east of present day T-108. As mentioned previously, historical aerial photographs identify a former tidal channel that extended from the LDW, along or adjacent to the north of the present day S Oregon Street ROW, and into the subject property (AGI 1992a). According to information on the construction and operations of the Diagonal Avenue S STP, this drainage channel was not used for water intake or effluent discharge from standard plant activities. The channel may have received untreated sewage from a small sewer system located to the northeast of T-108 (King County et al. 2005a), not associated with the Diagonal Avenue S STP. Historically, a raw sewage trunk line extending west from E Marginal Way S carried wastewater to the former control house and clarifiers. Wastewater was treated in the clarifiers and digesters and the sludge was then pumped into open ponds and drying beds on the northern portion of the property (Dames & Moore 1988). The size, location, and configuration of the sludge ponds changed over the years as observed in aerial photographs (Appendix B). Primary-treated effluent was discharged into the LDW through a 30-inch steel outfall located approximately mid-way along the property shoreline (see former Diagonal Avenue STP outfall 2002 on Maps 2 and 6; Appendix A, Photo 14; and Appendix B). A parking lot area was constructed on the southern portion of the property around 1962 (Port of Seattle 1988). A drainage system was installed in association with the parking area, including an 18-inch concrete outfall (Port outfall 2225 on Map 2). The Diagonal Way STP was closed by 1970 when construction of the West Point Wastewater Treatment Plant (WWTP) was completed and sewage and wastewater was re-routed to that facility. As part of the construction of the West Point facility, the Duwamish Pumping Station was constructed adjacent to and east of T-108 and the Diagonal Way CSO/SD and Duwamish EOF were installed beneath the S Oregon Street ROW. The structures and above-ground clarifiers were demolished and removed in the early-1970s. The digesters were reportedly filled and left in-place (Port of Seattle 1992a). Sludge up to five feet thick was left in the sludge ponds and drying beds on the northern portion of the property and subsequently covered with fill material (Dames & Moore 1988; AGI 1992b). The source of the fill material has not been identified during the review of historical documentation. - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 27 3.3 CHIYODA CORPORATION INTERNATIONAL OWNERSHIP (C. 1972-1980) Chiyoda acquired the T-108 subject property in the mid-1970s and planned to construct a chemical manufacturing plant with a loading dock on the site. Although shoreline dredging was conducted by Chiyoda in anticipation of the manufacturing plant, it was never constructed because the company failed to acquire the necessary permits for the shore-based dock (King County 2002). In 1974, approximately 265 gallons of PCB oil consisting of Aroclor 1242 were spilled into Slip 1 of the LDW (upstream of T-108) when an electrical transformer owned by the United States Air Force was damaged while being loaded onto a barge owned by the Alaska Puget United Transportation Company under contract to the Navy Military Sea Transportation Service (King County et al. 2005a; EPA 1975). Neither the US government nor the Puget United Transportation Company would claim responsibility for the spill, so EPA took control as the On-scene Coordinator for the spill cleanup. The majority of the spilled PCB material (approximately 250 gallons) was dredged from the bottom of the LDW and transferred to a trailer mounted portable treatment plant stationed on the southern portion of the Federal Center South facility. Additional dredging was conducted by EPA and USACE between 1974 and 1976 to remove LDW sediments contaminated with the residual PCB material (approximately 20 gallons not removed during the initial cleanup effort). According to the interim groundwater and shoreline soil investigation final work plan report completed for T108 by PGG, Chiyoda agreed to allow the EPA and USACE to store and treat approximately 10 million gallons of dredged sediment slurry on the subject property (Pacific Groundwater Group 2006c). A historical record of this agreement was not identified through the course of this investigation. To accommodate treatment and disposal of the dredged sediment, USACE excavated two pits were excavated on the northern portion of the T-108 property near the location of a large former sludge pond (see Map 6 and Appendix B). The pits were reported by the Pacific Groundwater Group (PGG) to have been excavated to depths of 10 to 12 ft deep based on a review of a 1976 topographic map (2006c). PCB-contaminated sediment slurry was pumped into the southwest corner of the western pit where solids were allowed to settle out. The liquid portion of the slurry was then decanted into the eastern pit and pumped to a holding pond and treatment unit. From there it was pumped back into the LDW. PCB Aroclor 1242 concentrations in the dredged sediment within the western pit ranged from 146 mg/kg at the slurry intake point in the southwest corner of the pit, to 33 mg/kg in the pit interior (Pacific Groundwater Group 2006c). The location of the holding pond and treatment unit are not known. The sediment treatment process was completed and USACE filled the pits by 1977. After treatment, water was pumped back into the LDW, however the solids that had settled out within the holding pits (primarily the western pit) were left in place and the pits were subsequently covered with fill material (Pacific Groundwater Group 2006c). - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 28 The fill consisted of the material excavated during pit construction and from other sources (see paragraph that follows). It has been estimated that between 7,000 and 8,000 cy of sediment dredged during the PCB spill cleanup were buried in the holding pits, and that in total, this included approximately 170 gallons of PCBs (Pacific Groundwater Group 2006c). In 1980, Chiyoda sold the T-108 property to the Port. In 1977, Chiyoda cut back and dredged the northern portion of the T-108 shoreline to improve berthing (see Appendix B); the new shoreline was approximately 100 ft further inland from the extent of the shoreline before dredging (King County 2002). It is estimated that 80,000 cubic yards (cy) of material was dredged from the area (King County et al. 2005a). Based on a review of historical aerial photographs, it appears that the southern extent of the dredging likely ended in the vicinity of the former Diagonal Avenue S STP outfall (Maps 2 and 6). Dredged material was stockpiled on the northern portion of the Western Parcel (see Map 6 for approximate location), and was also used to fill the dredged sediment pits, fill nearshore areas, and level the site of the former Diagonal Way STP. 3.4 OWNERSHIP AND OPERATIONAL HISTORY (1980-2008) – EASTERN PARCEL The subject property was first subdivided into the Eastern and Western Parcels in the early 1980s. Since that time, ownership of the Eastern Parcel traded between the Port and Chevron a few times in the 1980s and 1990s. Since 1992, the Eastern Parcel has been owned by the Port and leased as a container terminal. 3.4.1 Port of Seattle Ownership (1980-1984) The Port acquired the subject property from Chiyoda in 1980. Based on a historical aerial photo from 1981, the paved southern portion of the property and a small area in the central portion of the property were used for container storage (Appendix B). No additional information regarding the use of the Eastern Parcel during this time period was identified. 3.4.2 Chevron USA Products Company Ownership (1984-1992) In 1984, Chevron USA Products Company (Chevron) acquired the Eastern Parcel of T-108 as part of a deal in which the Port acquired Pier 32 (formerly Terminal-30/Chevron). This is the first time that property ownership was split between the Eastern and Western Parcels. Chevron used the Eastern Parcel from 1984 to 1992 to stockpile soil and store equipment. Gasoline station equipment, including cranes and gasoline pumps, were stored on the southern portion of the parcel (Map 7) (Port of Seattle 1992a). The area was also used for automobile parking. One or two mobile office trailers were located on the Eastern Parcel during Chevron’s ownership. Soil stockpiles and equipment storage areas are visible in aerial photographs from 1990 (Appendix B). - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 29 S Oregon St ROW / Duwamish EOF Soil stockpile King County Pump Station Landfarming area Western Parcel Eastern Parcel Truck turnaround and crane storage Former Diagonal Ave STP outfall / Parking area Gas pump storage ve lA a on ag i D Port of Seattle SD / S Port of Seattle Public Access Habitat Mitigation Area (1989) Historical conditions in the 1980s S Oregon St ROW / Duwamish EOF Area of new pavement Newly graveled area King County pump station Newly graveled area Pneumatic conveyor system installed Former Diagonal Ave STP outfall Area of new pavement / Lafarge loading and truck turnaround area Cement silos / Eastern Parcel Western Parcel Port of Seattle SD / Prepared by CEJ, 070908; MAP # 3352; W:\Projects\06-08-14-01 Marine Environmental Source Control\Data\GIS\T-108 D a on g ia S ve lA Port of Seattle Public Access Outfalls Existing railroad spur Newly installed railroad spur Approximate historical shoreline Area of new pavement Terminal 108 Tax parcel boundary Navigation channel Habitat Mitigation Area (1989) Historical conditions in the 1990s 0 Wind Ward environmental LLC ± 0 100 20 200 Feet Photo source: "USGS High Resolution Orthoimage, Seattle/Tacoma, WA", United States Geological Survey, 2003. Distributed by King County GIS. Photo date 06/11/2002. Location of historical features are approximate Map 7. Historical site features 1980s, 1990s 40 Meters FINAL The northwestern portion of the parcel was used by Chevron to treat soil contaminated with petroleum hydrocarbons using a technique called land-farming for approximately six months in 1990. Approximately 1,400 cy of soil excavated from a local service station that had been contaminated by a leaking underground fuel storage tank was treated by land-farming (Thorne Environmental 1990); the approximate location where the landfarming activity occurred is presented on Map 7 and visible on the aerial photograph from 1990 (Appendix B). Prior to the onset of land-farming activities, analytical samples were collected from the soil stockpile and the surface soil in the proposed land farming area. Total petroleum hydrocarbons (TPH) were detected above Ecology cleanup standards of 200 parts per million (ppm) in the soil stockpile (Thorne Environmental 1990) (Appendix C). Total xylenes, ethylbenzene, barium, and cadmium were also detected in the soil stockpile; PCBs, benzene, toluene, arsenic, chromium, lead, mercury, selenium, and silver were not detected (Thorne Environmental 1990). Gasoline and benzene, toluene, ethyl benzene, and xylene (BTEX) constituents were not detected in surface soil samples collected from the proposed land-farming location; however, PCBs were detected in five out of the six samples (with a maximum total PCB concentration of 6.90 ppm) (Pacific Environmental Group 1991). The soil was placed in a 200-square ft area located at approximately the same location as the PCB dredge sediment disposal pits that were created to treat impacted sediment from the 1975 PCB spill at Slip 1. The aerial photo from 1990 shows the land farming area in the northern portion of the parcel (see Appendix B). Prior to placing the petroleum-contaminated soils onsite, a clay cap was installed in the designated landfarming area (Map 7) to prevent the possibility of contaminating the soils to be landfarmed with other contaminants that might have been present on the property (Dames & Moore 1988). The clay cap had a surface approximately two ft thick and varied from an elevation of approximately 15 to 17.5 ft (Dames & Moore 1992). The soil was landfarmed until petroleum hydrocarbon concentrations in the soil were below MTCA Method A cleanup screening levels. TPH concentrations of the land-farmed soil ranged from 42-190 mg/kg, TPH-gasoline concentrations ranged from non-detected to 28 mg/kg, and BTEX constituents were not detected (Pacific Environmental Group 1991) (Appendix C). The stockpiled soil was distributed on the Eastern Parcel of T-108 to a thickness of approximately 1 to 2 ft (Dames & Moore 1992). After land-farming activities were completed, soil samples were also collected beneath the treatment area to determine whether native soil conditions had been affected by land-farming activities (Appendix C). TPH concentrations ranged from 15 to 100 mg/kg, TPH-gasoline was not detected, and BTEX constituents were not detected (Pacific Environmental Group 1991). PCB 1248 was detected at concentrations ranging from 106 to 9.3 mg/kg. These results suggest that native soil was contaminated with TPH because of land-farming activities but that the contamination was below Ecology cleanup levels. - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 33 In 1992, the Port purchased the Eastern Parcel of T-108 back from Chevron and redeveloped the property for use as a container terminal. Permitting documentation for development of the container terminal indicated that the land-farmed soils would be removed and disposed of at an approved off-site facility prior to redevelopment (Port of Seattle 1992a); therefore, it is assumed at this time that the land-farmed material is no longer present on the T-108 property. 3.4.3 Port of Seattle Ownership – Eastern Parcel (1992-1997) In the early 1990s, the Port redeveloped the Eastern Parcel of T-108 for use as a container storage and chassis repair yard to accommodate CCI in expanding their operations from T-106W (located adjacent to the northwest of T-108). The redevelopment involved construction of a paved access road across the S Oregon Street ROW to connect the two Port properties, construction of a 4-lane truck access road extending from Diagonal Avenue S onto the southern portion of the Eastern Parcel, construction of a rail spur extending from the rail line along the south side of Diagonal Avenue S to the northwest corner of the container terminal, and re-surfacing much of the parcel with asphalt pavement and gravel for container storage and transport (Port of Seattle 1992a). These improvements are visible on aerial photographs from 1995 and subsequent years (Appendix B). Improvements were also made to the stormwater drainage system including installation of an oil-water separator, catch basins, and new subsurface piping; this drainage system is discussed in Section 2.4. In order to ensure subsurface materials would be geotechnically suitable to support future land use as a cargo container storage and transport yard, approximately 5,000 cubic yards (cy) of soil and fill material, including the soil land-farmed during Chevron’s ownership of the property, was removed from the property between 1992 and 1993 (as indicated by the permit for the effort), and replaced with newly-imported fill material (Port of Seattle 1992a). Development of the container terminal was completed by 1995. CCI’s operations included unloading cargo from barges and loading it onto trucks and railcars for transport. In addition, chassis repair and maintenance operations also occurred at the eastern portion of the Eastern Parcel during CCI’s occupation of the property. Hazardous substances handled on the property in association with these activities included (but were not necessarily limited to) chlorofluorocarbon (CFC) 11/12, Freon 12, paint, paint thinner, oils, lubricants, and fuel products (Container Care International 1993). In 2004, CCI merged with another depot operator called Global Intermodal Systems to form ConGlobal Industries (ConGlobal). ConGlobal assumed operation of both T-108 and T-106W at this time. For a brief period, ReNu recycling also leased approximately 2 acres of the southern portion of the Eastern Parcel of T-108 for use as temporary storage for trucks and roll-off bins (Pacific Groundwater Group 2007a). The ReNu lease was transferred to ConGlobal in August 2007. - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 34 3.5 OWNERSHIP AND OPERATIONAL HISTORY (1980-2008) – WESTERN PARCEL The Port purchased the Western Parcel of T-108 from Chiyoda in 1980 and has maintained ownership of the property since that time. Between 1980 and 1985, the parcel remained vacant, with the exception of some container storage limited to the southern, paved portion of the parcel in the early 1980s. In 1985, the Pioneer Construction Materials Co. (Pioneer) was permitted to use the site as a temporary construction aggregate storage area for a period of approximately six months (Taylor 1985). The aggregate was unloaded from barges using a portable stacker/conveyer system and subsequently loaded onto trucks for transport to a construction site along I90. The aggregate originated from Pioneer’s gravel pit in Steilacoom, Washington and is assumed to have been free of contaminants when brought to the site. In the late 1980s, a habitat project was constructed along the southern portion of the T-108 shoreline to mitigate for loss of habitat at another Port property (T-30). Approximately 12,400 cy of sediment and soil were cut out of the existing shoreline bank to create the 12,300 square foot (SF) intertidal shoreline habitat area located immediately north of Diagonal Avenue S (Port of Seattle 1985b) (Map 7). The majority of the soil and sediment removed during construction of the mitigation site was approved for open-water disposal in Elliott Bay. Approximately 200 cy of the excavated material was found to be contaminated and required disposal at an approved upland site (Ecology 1987). According to Port staff, contaminants in the soil were primarily metals and PAHs and were thought to be related trash (cans, broken glass, and other debris) dumped at the Diagonal Avenue S street end. Additional details (including the analytical results) of the sampling conducted in the mitigation area prior to its construction are not currently available. After the soil and sediment excavation was completed, approximately 1,500 cy of clean rock and structural fill were installed at the mitigation area to stabilize the bank. Between 1989 and 1998, Lafarge leased the Western Parcel from the Port for use as a bulk cement transshipment facility. The facility was constructed in the early 1990s and was located on the southern half of the Western Parcel of T-108 (Map 7). Lafarge used the facility to transport bulk cement from barges to trucks and rail cars for distribution. Several site improvements were made during development of the Lafarge facility. A barge moorage pier and pneumatic conveyor system were constructed offshore in the LDW, approximately in the center of the parcel shoreline (see Map 7 and Appendix B). A product transfer tower, four dry cement storage silos, a truck scale, and a truck washdown area were all constructed according to permitting documentation (Port of Seattle 1988). The truck wash-down area was constructed on a concrete pad that drained to a catch basin and ultimately to the sanitary sewer. A prefabricated shed was placed on a paved area on the southwest portion of the parcel for use as an office building. Public access improvements to the shoreline mitigation area and Diagonal Avenue S street end were also planned as part of the project. These improvements were in - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 35 accordance with the Port’s public access plan (Port of Seattle 1985a) and included a trail and hand-boat launch area. The wooden bulkhead observed along the property shoreline in March 2008 were associated with the public access trail (Blomberg 2008) (Appendix A, Photos 12 and 13). Paved roadways, a rail spur, and associated loading areas were also constructed as part of the Lafarge facility improvements. According to Port staff, a covered loading area was located adjacent to the storage silos and was used to load trucks and railcars. The loading area was a shallow pit excavated beneath the rail line. Dry bulk cement that arrived to the facility by rail was unloaded into the pit and then loaded into the silos via an additional pneumatic conveyor system (Blomberg 2008). Plans for the terminal also called for construction of office and warehouse buildings, however according to Port staff and based on a review of historical aerial photographs, it does not appear that these buildings were ever constructed. Grading and shoreline modifications were made as part of the Lafarge facility development. In order to stabilize eroding shoreline in the central and northern portions of the property, the bank was cut back above 11.5 ft MLLW and stabilized with riprap (Port of Seattle 1988, 1989). Excavated bank sediments, as well as dredge spoils along the northern portion of the shoreline (likely remaining from Chiyoda’s 1977 dredging project) were graded across the northern portion of the parcel (Port of Seattle 1988). The area was then seeded/planted with vegetation to help control erosion. Additional public access improvements were made to the mitigation area in the early1990s. These improvements were made to compensate for public access restrictions to the S Oregon Street ROW implemented during development of the container storage facility on the Eastern Parcel of T-108 (Port of Seattle 1992a). Public access enhancements included removal of approximately a half acre of asphalt near the mitigation area, installation of additional native plantings, and installation of other human-use features such as picnic tables and interpretive signage (Port of Seattle 1992a). In the late 1990s, Lafarge removed the bulk cement facility fixtures and transported them for use in Eastern Washington. The fixtures removed included the storage silos, office shed, truck scale and wash-down area, and rail car loading equipment (Port of Seattle 1999). Beginning around 2002 or 2003, CCI used a portion of the parcel as a chassis storage area. 3.6 CURRENT OPERATIONS AT T-108 ConGlobal is currently the only tenant at T-108, and the company continues to operate a container terminal on the Eastern Parcel. Containers are stored throughout the Eastern Parcel and maintenance is conducted on the eastern end of the parcel (Appendix A, Photo 2). A fueling area, which includes two aboveground storage tanks (AST) containing diesel (one 300-gallons and one 600-gallons) is located on the southern portion of the Eastern Parcel. An additional 1,200-gallon AST is also located in this area. - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 36 ASTs are regulated based on the requirements outlined in the Code of Federal Regulations (CFR) (40 CFR 112 – Spill Prevention, Control, and Countermeasure Plans). ConGlobal also leases the majority of the Western Parcel for use as a chassis storage and lay-down area (Appendix A, Photos 7 and 8). The public access park and mitigation area remain on the southern portion of the Western Parcel and are not included in the ConGlobal lease area (Appendix A, Photos 9 and 10). For reference purposes, Map 8 provides a comprehensive presentation of the historical site features (presented on Maps 6 and 7) overlying the current conditions of the T-108 subject property. Map 9 expands this comprehensive presentation to include the locations of previous soil and groundwater sample locations. As of April 2008, ConGlobal maintains an industrial NPDES stormwater permit (No. SO3-010569) and a SWPPP for management of stormwater discharges from the container terminal to the Duwamish/Diagonal CSO/SD system has been prepared. ConGlobal also maintains an SPCC plan to be implemented in the case of a hazardous materials release. The purpose of the NPDES permit, SWPPP, and SPCC plan is to reduce the potential for stormwater contamination resulting from industrial activities conducted at the facility. Ecology conducted a stormwater compliance inspection at the facility on June 5, 2008. Several modifications to the SWPPP were required after the inspection. Best management practices (BMPs) are implemented to reduce stormwater pollution, and inspections and stormwater sampling are conducted as required under the NPDES permit and associated SWPPP. Stormwater samples are analyzed for total zinc, oil and grease, turbidity, total suspended solids (TSS), and pH. In addition, total copper and total lead are analyzed if the benchmark for zinc is exceeded during two consecutive sampling events. The chassis repair area and equipment fueling areas on the Eastern Parcel are covered by the NPDES permit and SWPPP; the portions of T-108 used only for storage, office space, and parking are not covered. - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 37 S Oregon St ROW J Duwamish/Diagonal CSO/SD $ + Duwamish EOF J Approximate boundary of sewage ~~~?---------------------------------I treatment plant ~---Surface ponds Surface ponds Dredge material from 1977 Chiyoda event Western Parcel Eastern Parcel Approximate location of PCB sediment and sludge disposal/ treatment area re: Slip 1 PCB spill 1975 Landfarming area E Marginal Way S King County Pump Station Terminus of former drainage channel unknown Surface ponds Pump house Digesters Capped February 2004 Clarifiers Control house Sludge drying beds # * Former Diagonal Ave STP outfall J Parking area o ag Di eS Av l na J Outfalls Pond Landfarming area Approximate sewage plant boundary Terminal 108 Prepared by CEJ, 071009; MAP # 3356; W:\Projects\06-08-14-01 Marine Environmental Source Control\Data\GIS\T-108 ! Port of Seattle SD ? J Sediment cap areas Tax parcel boundary Port of Seattle Public Access Navigation channel Federal Center South Photo source: "USGS High Resolution Orthoimage, Seattle/ Tacoma, WA", United States Geological Survey, 2003. Distributed by King County GIS. Photo date 06/11/2002. Habitat Mitigation Area Thin-layer Cap February 2005 Wind Ward environmental LLC ± Location of historical features are approximate. 0 0 400 100 800 Feet Map 8. Historical Site Features Overlay 200 Meters FINAL ! H S Oregon St ROW Duwamish/Diagonal CSO/SD J ! 5 Y X ! H Y X $ + Duwamish EOF J ’ ! 5 ! H PGG-5 ! 5 Area of surface drainage and infiltration ! 5 ! 5 ! 5! 5 ! 5 5 ! 5! ! 5 Y X ! 5 Y X ! 5 ! 5 ! 5 ! 5 Y X Western Parcel ! 5 Y X Y X ! 5 ! 5 Y X ! 5 ’ ! 5 Y X PGG-6 ! 5 Control house Y X ’ YSludge drying beds X Y X PGG-3 Y X PGG-4 ! 5 Y X Y X # * Former Diagonal Ave STP outfall J ! 5 Y X ’ ’ Pump house ! 5 Y X Y X ! 5 PVC perforated drain field ! 5 X Y ! 5 ! 5 Y X ! 5 ! 5 ! 5 ! 5 Capped February 2004 King County Pump Station ! 5 Y X ! 5 ! 5 ! 5 ! 5 ! 5 drain field ! ! 5 5 PVC perforated 5 ! 5! ! 5 ! 5 ! 5 ! 5 ! 5 ! 5 Y X ! 5 ! 5 Eastern Parcel ! 5 ! 5 ’ ! 5 ! 5 ! 5 Y X ! 5 ’ Y X ! 5! 5 ! 5 ! 5 ! 5 ! H PGG-1 Y X ! 5 ! 5 ! 5 ! 5 ’ ! 5 ! 5 ! 5 ! H E Marginal Way S ! H Y X ! 5 ! 5 ! 5 ! 5 Y X ’ ! 5 Y X Y X Y X Y X Y X o ag Di Y X Y ! 5 X eS Av l na ’ Prepared by CEJ, 071009; MAP # 3357; W:\Projects\06-08-14-01 Marine Environmental Source Control\Data\GIS\T-108 ! Port of Seattle SD J ? Y X Federal Center South Habitat Mitigation Area Wind Ward environmental LLC ± 0 0 Former drainage channel (terminus unknown) Dredge material from 1977 Chiyoda event Stormwater drainage network ’ Manhole PCB sediment and sludge disposal/treatment area re: Slip 1 PCB spill 1975 Y Catch basin X Port of Seattle Public Access Thin-layer Cap February 2005 ! H Soil sampling location ! 5 Monitoring well J Outfall ! 5 Clarifier Digester Approximate sewage plant boundary Sediment cap area Terminal 108 Storm drain line Landfarming area Tax parcel boundary CSO/SD/EOF infrastructure Surface pond Railroad spur Structure Parking Navigation channel Photo source: "USGS High Resolution Orthoimage, Seattle/Tacoma, WA", United States Geological Survey, 2003. Distributed by King County GIS. Photo date 06/11/2002. Locations of historical features are approximate. PGG-7 250 500 Feet 100 200 Meters Map 9. Historical site feature overlay, previous sample locations, and current drainage features FINAL 4 T-108 Environmental Conditions and Investigation Information Since the early 1980s, numerous environmental investigations have been completed at the subject property and at properties within its immediate vicinity. Environmental investigations have included sampling and analyses of soil, groundwater, seep water, bank soil, and nearshore sediment. Although samples have been collected over the majority of T-108, much of the investigation work has concentrated on the northern portion of the subject property, in the vicinity of the former landfarming and PCB sludge disposal and treatment areas. The following sections provide an overview of previous sampling events completed at the subject and adjacent properties. The information in the section has been presented to assist with overall evaluation of the subject property, in order to develop an effective, long-term source control strategy. The particular data discussed in the follow sections are provided in more detail in Appendix D (T-108 related data) and Appendix E (relevant adjacent property data). This section and Appendix E also provide information on the rights-of-way surrounding the subject property and the stormwater outfalls within the vicinity of T-108. 4.1 ENVIRONMENTAL DATA SUMMARY FOR T-108 In 2006, PGG completed a review and summary of historical soil and groundwater data for T-108 as part of their work plan for additional soil and groundwater sampling to be conducted on the property in 2006 and 2007 (Pacific Groundwater Group 2006c). The following soil and groundwater data summaries are based on the PGG work plan and the data reports summarizing PGG’s recent environmental investigations at T-108 (Pacific Groundwater Group 2006b, 2007a). 4.1.1 T-108 soil Several soil and groundwater investigations have been conducted on T-108 since the 1980s. Data are available from several historical investigations including Dames and Moore investigations from 1981 and 1984, PEG investigations from 1990, and an investigation by Applied Geotechnology, Inc. (AGI) in 1991 (Appendix D). PCBs, TPH (gasoline and diesel), toluene, ethylbenzene, and xylenes, thirteen individual PAHs, arsenic, cadmium, chromium, copper, lead, mercury, nickel, silver, thallium, and zinc have historically been detected in soils at T-108. Of these chemicals, only cadmium was detected above MTCA industrial cleanup levels. Soil conditions at T-108 were recently investigated by PGG (Pacific Groundwater Group 2006b). The locations sampled, PGG-2, PGG-5, PGG-6, and PGG-7, are shown on Map 3. PCBs (Aroclors 1248, 1254, and 1260), petroleum hydrocarbons (gasoline, diesel, and lube oil), 17 individual PAHs, arsenic, cadmium, chromium, copper, lead, nickel, and zinc were all detected. Of these, only diesel-range hydrocarbons, lube oil-range - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 43 hydrocarbons, and cadmium were detected above MTCA Method A industrial soil cleanup levels. Sample location PGG-2, located adjacent to the west of the PCB sediment disposal area, exceeded MTCA Method A industrial cleanup levels for dieselrange hydrocarbons and cadmium in the 9-10.5 ft bgs interval. The other exceedance (for cadmium) occurred in the 0.5-2 ft bgs interval in sampling location PGG-7, located at the southern portion of the Western Parcel near the mitigation area (Map 3). 4.1.2 T-108 groundwater Historical groundwater investigations were conducted on T-108 by Dames and Moore in 1981 and 1984 (Dames & Moore 1984) and by AGI in 1991 and 1992 (AGI 1992a, 1992b). Groundwater data from the Dames and Moore reports were not included in the PGG work plan, but data from the 1984 investigation are included along with other historical data in Appendix D of this report. Groundwater data from the 1981 Dames and Moore investigation were not identified during the course of this investigation; however, according to a site assessment summary report completed for Chevron in 1992, PCB Aroclor 1242 was detected at 0.9 µg/L in one of six groundwater monitoring wells sampled by Dames and Moore in 1981 (AGI 1992a). The well in which Aroclor 1242 was detected was located in the south-central portion of the approximate PCB sludge disposal area. Groundwater samples collected by Dames and Moore in 1984 did not contain PCBs at concentrations above the 1 µg/L detection limit (Dames & Moore 1984); the locations of these historical groundwater wells were not identified during the course of this investigation. PCBs were not detected in groundwater samples collected from T-108 by AGI in 1991 or 1992 (Appendix D). Groundwater monitoring results from the AGI investigations in the early 1990s identified petroleum hydrocarbons (diesel and gasoline) in wells located on the northern portion of the property. Gasoline-range hydrocarbons did not exceed MTCA Method A cleanup levels; diesel-range hydrocarbons did exceed MTCA Method C cleanup levels in one well located approximately 100 ft south of the sediment disposal pit area. BTEX constituents were also detected in groundwater samples collected within or near the sediment disposal pits; however, concentrations were below MTCA Method C industrial cleanup levels. PAHs were historically detected in groundwater samples collected from wells on the northern portion of T-108. Total carcinogenic PAH (cPAH) toxic equivalents (TEQs) exceeded the MTCA Method C cleanup level in three wells located to the east and south of the sediment disposal pit area, and one well within the disposal pit area in 1991. Total cPAH TEQs were below MTCA Method C in all wells when re-sampled in 1992 (Pacific Groundwater Group 2006c). Arsenic, cadmium, chromium, copper, lead, mercury, nickel, and zinc were detected in historical T-108 groundwater samples. Arsenic and cadmium were each detected above MTCA Method C cleanup levels; arsenic exceeded MTCA in a well near the northeast corner of the Eastern Parcel, and cadmium exceeded MTCA in two wells, one located - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 44 approximately 100 ft south of the sediment disposal pit area, and one located along the northern boundary of the sediment disposal pit area. In addition, arsenic exceeded the MTCA Method C cleanup level in three historical wells sampled by Dames and Moore in 1984 (Dames & Moore 1984); the locations of these wells are not known. In their work plan, PGG stated that historical groundwater samples collected at T-108 were likely unfiltered and therefore biased high (Pacific Groundwater Group 2006c). In addition, historical samples were not collected with the low flow method and therefore likely contained entrained soils which could also biased analytical results. In 2006 and 2007, PGG installed seven new monitoring wells and sampled groundwater during four monitoring rounds. The data from these sampling events are presented in Appendix D. PCBs were not detected in any of the wells during all four sampling rounds with the exception of Aroclor 1016, which was detected above MTCA Method A cleanup levels in one well in the second sampling round (PGG-2 on Map 3). This sample result was rejected due to poor sample quality (Pacific Groundwater Group 2006b). The sample was considered to be of poor quality because the well pumped dry several times during sampling, and it was concluded that soil particulates were likely introduced into the sample. In addition, due to a lab/chain-of-custody error, the sample was analyzed after its holding time had elapsed. Petroleum hydrocarbons and BTEX constituents were not detected in any of the wells sampled during the four sampling rounds. Non-carcinogenic PAHs were detected in two wells in the first round of sampling but were not detected in the following three rounds. Carcinogenic PAHs were detected in two wells (PGG-2 and PGG-5) during the second round of sampling. The results from well PGG-2 were rejected due to poor sample quality for the reasons discussed above (Pacific Groundwater Group 2006b). Total and dissolved arsenic, chromium, copper, nickel, and zinc were detected in multiple monitoring wells during all four sampling rounds. Within the first two rounds of sampling, total and dissolved arsenic were detected above MTCA Method A cleanup levels in wells PGG-1 and PGG-2 (Map 3). Total arsenic was also detected above MTCA Method A in well PGG-5 in the first sampling round. Total lead was detected above MTCA Method A in well PGG-1 in the first round of sampling. All detected metals concentrations in rounds three and four were below both MTCA Method A cleanup levels and the groundwater screening levels developed by Ecology for the protection of LDW sediments (Pacific Groundwater Group 2007a). Based on the 2006 and 2007 groundwater monitoring results, PGG recommended that groundwater monitoring be discontinued and that the groundwater pathway be considered closed as a source to LDW sediments (Pacific Groundwater Group 2007a). Ecology recently acknowledged that groundwater at the subject property was not considered a potential source of contamination to LDW sediments (Pacific Groundwater Group 2007a). - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 45 4.1.3 T-108 bank soil In 2005, King County collected two bank soil samples (DUD-30C and DUD-31C) from the northern portion of the T-108 shoreline (Anchor 2007) (see Appendix D, Tables D-8 and D-9). No information was provided regarding the tidal elevation at the time of sampling, or the condition of the bank where samples were collected. PCBs (Aroclors 1248, 1254, and 1260) were detected in both samples; however, the dry weight (dw) concentrations were below the MTCA Method A cleanup level for unrestricted land use. The OC-normalized concentration of total PCBs was greater than the CSL in one of the samples. The total organic carbon content of this sample was 1.05%. One individual low-molecular-weight PAH (LPAH) (i.e., phenanthrene) and all nine individual high-molecular-weight PAHs (HPAHs) analyzed for were detected; however, total LPAH and HPAH concentrations were below the SQS concentrations. Arsenic, cadmium, chromium, copper, lead, mercury, silver, and zinc were all detected in bank soil; however, only mercury was detected above the SQS (in one sample). Bis(2ethylhexyl) phthalate (BEHP), butyl benzyl phthalate (BBP), and di-n-butylphthalate were detected but were below the SQS. Phenol and benzoic acid were both detected above the CSL, and 1,2-dichlorobenzene was detected in one of the two bank samples at a concentrations below the SQS. 4.1.4 T-108 seep data Dames and Moore collected two seep samples from the T-108 shoreline in 1984 (Dames & Moore 1984). One of the maps was missing from this report; therefore, the sampling locations are not known. PCBs were not detected in either seep; however, the detection limit (1 µg/L) was above the MTCA Method A cleanup level of 0.1 µg/L. Cadmium, chromium, lead, mercury, and zinc were each detected in at least one of the seep samples. Arsenic was detected at 10 µg/L, which is above the MTCA Method C cleanup level. Lead was detected at 6 µg/L in one seep and at 5 µg/L in the other seep, and mercury was detected in one seep at 2 µg/L (no MTCA groundwater cleanup levels are available for lead for comparison). Cadmium, chromium and zinc were all detected below MTCA Method C cleanup levels. Details on how the seep samples were collected (e.g., filtered or unfiltered samples) were not available. 4.2 RELEVANT INFORMATION FOR SURROUNDING PROPERTIES, ROADWAYS, AND OUTFALL SYSTEMS The following sections discuss relevant information pertaining to the adjacent properties, streets, and outfall networks in the immediate vicinity of the T-108 subject property. The surrounding area chosen for discussion in this section focus on those properties or facilities that may directly affect source control concerns at the subject property. - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 46 4.2.1 Adjacent properties Environmental investigations have been conducted on several of the properties adjacent to T-108. Surrounding properties include T-106W and the WSLCB facility to the north, a King County pumping station and E Marginal Way S to the east, and the General Services Administration’s (GSA’s) Federal Center South facility to the south. The following section briefly discusses the operational and environmental investigation history of these adjacent properties. 4.2.1.1 Terminal 106 West – southern portion of property Terminal 106 West (T-106W) is located across the S Oregon Street ROW to the north of T-108. It is approximately 31 acres in size. The southern portion of the property, currently operated as a container storage facility, is applicable to T-108 source control because of its proximity. T-106W includes a container repair and wash area, container lifts and stackers. The majority of the facility is covered with gravel (Port of Seattle 1992b). A portion of the northern end of the container terminal drains to the S Nevada Street storm drain system (Ecology 2004a). Available information for this property is summarized in Table 2. 4.2.1.2 Washington State Liquor Control Board The WSLCB property is approximately 11 acres in size and is located across the S Oregon Street ROW to the north of T-108. There are two warehouse buildings on the property used for storage and distribution of alcoholic beverages and other unspecified items (King County 2008). Very little information was available regarding the past and current uses of the property, property ownership history, and environmental conditions on the property; however, according to a 1992 business letter from Barbara Hinkle, Port of Seattle Environmental Management Specialist to Barbara Ritchie, Ecology, past practices on the property, including steam cleaning of batteries and equipment may have caused contamination along S Oregon Street ROW (Port of Seattle 1992b). Available information for this property is summarized in Table 2. . - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 47 Table 2. TIME PERIOD Summary of relevant information for properties adjacent to T-108 OWNERSHIP, OPERATIONAL HISTORY, AND CHANGES IN SITE FEATURES CHEMICALS IDENTIFIED IN SAMPLED ENVIRONMENTAL MEDIA ENVIRONMENTAL INVESTIGATIONS REMEDIAL ACTIONS AND SOURCE CONTROL ACTIVITIES REFERENCES Terminal 106 W (southern portion of property). Regulatory Listings: RCRA SQG, LUST/UST, ICR Late 1960s property developed by reclaiming land from LDW; no ownership information available 1970 property purchased by Port of Seattle; much of site reclaimed from LDW when rock bulkhead installed and area backfilled to create approximately 900 linear ft of additional upland shoreline 1975 to 1990 Port~ of Seattle Coastal Trailer Repair, Inc. leased the southern portion of the property for use as cargo container storage, repair and cleaning yard unknown Pinnacle Geosciences (2005) na unknown Pinnacle Geosciences (2005), King County et al. (2005a) RCRA compliance inspection by Ecology (1985) noted storage of waste oil drums and flammable solvents; generator reports dated between 1982-1990 identified wastes including lacquer thinner, oil, and waste solvent; waste handling practices at the facility were unclear na Coastal Trailer Repair received guidance from Ecology on cleanup of the waste oil and solvent storage areas Pinnacle Geosciences (2005) soil and groundwater investigation of a compressor area and a steam-cleaning area (1990) oil and PCBs identified in soil; lead, arsenic, PCBs, and oil identified in groundwater soil removed from compressor area (1992) Envirotech (1991) as cited in Pinnacle Geosciences (2005) unknown na unknown Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 48 TIME PERIOD 1990 to 2007 2007 to present OWNERSHIP, OPERATIONAL HISTORY, AND CHANGES IN SITE FEATURES Container Care International (CCI) leased property for use as a container terminal; activities included storage, cleaning, repair, and transport of cargo containers and chassis ConGlobal Industries leases property for use as a container storage and repair yard CHEMICALS IDENTIFIED IN SAMPLED ENVIRONMENTAL MEDIA ENVIRONMENTAL INVESTIGATIONS REMEDIAL ACTIONS AND SOURCE CONTROL ACTIVITIES REFERENCES Applied GeoTechnology (1992) as cited in Pinnacle Geosciences (2005) soil and groundwater investigation related to UST removal (1992) petroleum identified in soil and groundwater two USTs and associated petroleumcontaminated soil removed (1991) joint site inspection by the City of Seattle and Ecology (2001) noted poor housekeeping practices associated with used oil, antifreeze, and other waster materials no sampling conducted unknown Ecology (2004a) facility inspection by Ecology (2002) no sampling conducted unknown Ecology (2004a) catch basin solids sample collected along the boundary of T-106W and the WSCLB property by SPU (2003)a copper (30 mg/kg dw), lead (10 mg/kg dw), zinc (55 mg/kg dw), TPH-D (15 mg/kg dw), TPH-O (52 mg/kg dw), BEHP (130 µg/kg dw), and BBP (20 µg/kg dw) detected in solids sample unknown Schmoyer (2008) na established a SWPPP and acquired a general stormwater NPDES permit from Ecology Pinnacle Geosciences (2005) copper (30 mg/kg dw), lead (10 mg/kg dw), zinc (55 mg/kg dw), TPH-D (15 mg/kg dw), TPH-O (52 mg/kg dw), BEHP (130 µg/kg dw), and BBP (20 µg/kg dw) detected in solids sample unknown Pinnacle Geosciences (2005), King County Parcel Viewer (online) none Washington State Liquor Control Board. Regulatory Listings: None Unknown to 2008 Port~ of Seattle property owned by the SWLCB; warehouses used for storage and distribution catch basin solids sample collected along the boundary of T-106W and the WSCLB property by SPU (2003)a Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 49 TIME PERIOD OWNERSHIP, OPERATIONAL HISTORY, AND CHANGES IN SITE FEATURES CHEMICALS IDENTIFIED IN SAMPLED ENVIRONMENTAL MEDIA ENVIRONMENTAL INVESTIGATIONS REMEDIAL ACTIONS AND SOURCE CONTROL ACTIVITIES REFERENCES 1950s warehouse building constructed unknown na unknown Pinnacle Geosciences (2005), King County Parcel Viewer (online) 1999 warehouse building demolished and reconstructed unknown na unknown Pinnacle Geosciences (2005), King County Parcel Viewer (online) 2007 second warehouse building constructed unknown na unknown Pinnacle Geosciences (2005), King County Parcel Viewer (online) unknown Aerial Photo Publishers (1946), Photographer unknown (1953), Pacific Aerial Surveys (1961),WDNR (1970) unknown Pinnacle Geosciences (2005),King County et al. (2005a),Pacific Aerial Surveys (1961),WDNR (1970) King County/METRO Duwamish Pump Station. Regulatory Listings: RCRA SQG 1946 to late 1960s site undeveloped, owner not known; southern boundary may have been used as a parking area Late 1960s to present facility owned and operated by King County (formerly Metro) as a pumping station associated with the Elliott Bay Interceptor (part of the larger West Point WWTP system,) and the Duwamish Siphon unknown na unknown na Federal Center South/US General Services Administration: Regulatory Listings: CSCSL, Spills, VCP, LUST/UST, ICR c. 1931 to c. 1941 Port~ of Seattle property first developed and operated as a Ford automobile production plant unknown Terminal 108 Environmental Conditions Report na FINAL unknown January 23, 2009 Page 50 Herrera (2001) TIME PERIOD OWNERSHIP, OPERATIONAL HISTORY, AND CHANGES IN SITE FEATURES c. 1937 to present U. S. government acquired property and leased space in numerous buildings on the property for use as warehouse storage, office space, vehicle maintenance, and parking; materials were loaded onto barges and other vessels at Slip 1 1974 to 1976 southern portion of property adjacent to Slip 1 and the LDW used as a treatment facility to remove spilled PCBs from Slip 1 and the LDW; treatment facility consisted of dredge pumps, a mobile treatment plant, dredged material receiving and holding tanks, and a clarifier; 215 barrels of contaminated sludge temporarily stored in the Air Force warehouse (Building 1202 on Map 2) during treatment operations property owned by US government and leased to various tenants by GSA 1993 Port~ of Seattle CHEMICALS IDENTIFIED IN SAMPLED ENVIRONMENTAL MEDIA ENVIRONMENTAL INVESTIGATIONS na REMEDIAL ACTIONS AND SOURCE CONTROL ACTIVITIES REFERENCES na na Herrera (2001) environmental investigations and cleanup related to a 265-gallon PCB spill into Slip 1 caused when a PCB-containing electrical transformer owned by the US Air Force was damaged while being loaded onto a private barge under contract to the Navy PCBs (Aroclor 1242) an initial spill cleanup was conducted by EPA in 1974; additional cleanup of PCBcontaminated sediments was conducted by EPA/USACE from 1974 and1976 EPA (1975) hazardous waste inspection by Ecology noted boiler water was treated with algaecides, biocides, and fungicides and discharged into a drain (the discharge location of this drain was not specified); also chemicallytreated coolant was discharged to a floor drain that discharged to the LDW and a drum storage area drained to the LDW na na Ecology (2004a) Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 51 TIME PERIOD OWNERSHIP, OPERATIONAL HISTORY, AND CHANGES IN SITE FEATURES CHEMICALS IDENTIFIED IN SAMPLED ENVIRONMENTAL MEDIA ENVIRONMENTAL INVESTIGATIONS REMEDIAL ACTIONS AND SOURCE CONTROL ACTIVITIES REFERENCES property owned by US government and managed by GSA soil and groundwater investigations associated with the removal of USTs diesel-range hydrocarbons (up to 4,700 mg/kg), heavy oil-range hydrocarbons (up to 960 mg/kg), gasoline-range hydrocarbons (up to 700 mg/kg), xylenes (up to 66 mg/kg), and metals (including lead) identified in soil; petroleum (gasoline plume and heavy hydrocarbons) and BTEX identified in groundwater; PCBs and VOCs not detected in soil samplesb 2001 building on the western portion of property (Building 1203 on Map 2) used by the FBI as a maintenance area for motor pool vehicles Phase I ESA conducted by Herrera; recognized environmental conditions identified included soil and groundwater contamination from removed USTs, the presence of five remaining USTs, and historical uses of the property no sampling conducted in association with the Phase I ESA unknown Herrera (2001) 2008 GSA continues to manage the property; warehouse storage and office space is leased to various government agencies and other tenants, and the site is also used for vehicle maintenance and parking unknown na unknown Ecology (2004a; 2008) 1997 to 1999 a b USTs and associated contaminated soil removed Herrera (2001); Glacier Environmental (1997), Herrera (1999), and Herrera (2003) as cited in Ecology (2004a) The same sample is discussed for both T-106W and the WSLCB property. The analytical data collected in association with UST removals was not available; however, maximum concentrations were reported in source documents. BBP – butyl benzyl phthalate BEHP – bis(2-ethylhexyl) phthalate BTEX – benzene, toluene, ethylbenzene, xylene CSL – cleanup screening level Port~ of Seattle Terminal 108 Environmental Conditions Report PCB – polychlorinated biphenyls RCRA – Resource Conservation and Recovery Act SQG – small-quantity generator SQS – sediment quality standard FINAL January 23, 2009 Page 52 Ecology – Washington State Department of Ecology ESA – Environmental Site Assessment FBI – Federal Bureau of Investigation GSA – General Services Administration ICR – Independent Cleanup Report LDW – Lower Duwamish Waterway LUST – leaking underground storage tank mg/kg – milligrams per kilogram na – not applicable Port~ of Seattle Terminal 108 Environmental Conditions Report SWPPP – stormwater pollution prevention plan TPH-D – diesel-range total petroleum hydrocarbons TPH-O – oil-range total petroleum hydrocarbons UST – underground storage tank VCP – voluntary cleanup program VOC – volatile organic compound WSLCB – Washington State Liquor Control Board WWTP – wastewater treatment plant µg/kg – micrograms per kilogram FINAL January 23, 2009 Page 53 4.2.1.3 King County Pumping Station King County operates a pumping station on the 0.7-acre parcel of land adjacent and to the east of T-108. The pumping station has been in operation as part of the Elliott Bay Interceptor (EBI) system since the late-1960s (Pinnacle Geosciences 2005; WDNR 1970). The EBI system carries sewage and wastewater from the LDW basin and parts of West Seattle to the West Point WWTP. No additional information was available for this property beyond what is summarized in Table 2. 4.2.1.4 GSA’s Federal Center South – northern portion The Federal Center South is located on a 33-ac parcel of land across Diagonal Avenue S to the south of T-108 (Map 2). The Federal Center South facility is owned by the US government and managed by the GSA which leases space within the center to various government agencies and other tenants. The property was operated as a Ford Motor plant from approximately 1931 to 1941 (Herrera 2001), and a significant historical PCB spill occurred directly offshore of the property in 1974. Additional a information available for this property is summarized in Table 2. 4.2.2 Adjacent streets Two street ROWs are located adjacent to T-108. The S Oregon Street ROW is located adjacent and to the north and the Diagonal Avenue S ROW is adjacent and to the south. These ROWs are applicable to environmental conditions on T-108 because of their proximity to the property. If contamination were present within the ROWs, the possibility would exist for these contaminants to migrate to T-108 or the LDW. Information about these two ROWs is presented in the sections that follow and is summarized in Table 3. 4.2.2.1 S Oregon Street ROW The S Oregon Street ROW extends westward from E Marginal Way S and terminates at the LDW. The ROW is owned by the City and is used for commercial operations by ConGlobal Industries and the WSLCB. The ROW has both paved and graveled portions. Power transmission lines are also located within the S Oregon Street ROW; public access to the roadway is restricted. The Duwamish/Diagonal CSO/SD and Duwamish EOF piping networks underlay the S Oregon Street ROW. - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 54 Table 3. Summary of relevant information for street rights-of-way adjacent to T-108 TIME PERIOD REMEDIAL ACTIONS AND SOURCE CONTROL ACTIVITIES SITE USE ENVIRONMENTAL INVESTIGATIONS CHEMICALS IDENTIFIED IN ENVIRONMENTAL MEDIA CITATIONSa AVAILABLE ANALYTICAL DATA AND DATA LOCATIONb S Oregon Street ROW unknown Pacific Groundwater Group (2007a); Aerial Photo Publisher (1946); Photographer unknown (1953); Pacific Aerial Surveys (1961); WDNR (1970) na na Pre-1940 to late 1960s area included tidal/drainage channel that likely received stormwater and wastewater discharges from surrounding industrial properties Late 1960s underground piping associated with Metro's West Point sanitary sewer system and the Duwamish Siphon (the Duwamish/Diagonal CSO/SD, and the Duwamish EOF) laid adjacent to or within channel and channel filled unknown na unknown Pacific Groundwater Group (2007b); Pacific Aerial Surveys (1961); WDNR (1970) 1970s high-power electrical transmission lines installed within ROW unknown na unknown cleanup study report na 1970s to 1993 ROW; specific uses unknown unknown WDNR (1970); WDNR (1981); Metro Aerial (1991) na Port~ of Seattle unknown unknown Terminal 108 Environmental Conditions Report na na FINAL January 23, 2009 Page 55 TIME PERIOD 1993 to 2008 SITE USE portions of ROW used by the Port as an access roadway between T-108 and T-106W. Also used by WSLCB operations; public access restricted; the Duwamish/Diagonal CSO/SD and the Duwamish EOF discharge at end of ROW REMEDIAL ACTIONS AND SOURCE CONTROL ACTIVITIES ENVIRONMENTAL INVESTIGATIONS CHEMICALS IDENTIFIED IN ENVIRONMENTAL MEDIA Phase II ESA to investigate soil, groundwater, and adjacent intertidal sediment conditions (2007) PAHs, diesel, and lube oil detected above MTCA Method A cleanup levels in soil, PCBs, cadmium, copper, lead, nickel, and zinc also detected in soil; gasoline, BTEX, and arsenic not detected in soil; cPAHs, lube oil, and dissolved arsenic detected above MTCA Method A in groundwater, PCBs also detected in groundwater; PAHs, diesel, lube oil, and metals detected in intertidal sediment CITATIONSa AVAILABLE ANALYTICAL DATA AND DATA LOCATIONb unknown Pacific Groundwater Group (2007b) soil, groundwater, and intertidal sediment data presented in Appendix E unknown Aerial Photo Publisher (1946); Photographer unknown (1953); Pacific Aerial Surveys (1961) na na na Diagonal Avenue S ROW Pre-1944 to early 1960s road ROW extending from E Marginal Way S to LDW with railroad spur crossing c. 1961 to mid-1980s southwestern half of ROW incorporated into a large parking area for the Diagonal Avenue S STP and Federal Center South facility; street-end may have been used as an unofficial dump site unknown na unknown Pacific Aerial Surveys (1961); WDNR (1970); WDNR (1981); Metro Aerial (1991) Mid-1980s to 2008 road ROW extending from E Marginal Way S to LDW with railroad spur crossing; Diagonal Avenue S storm drain line present beneath ROW unknown na unknown Ecology (2004a); Metro Aerial (1991); WDNR (1995) a b unknown na Historical aerial photographs cited are presented in Appendix B. Data associated with the drainage lines buried within these rights-of-way are presented in Table 4. BTEX – benzene, toluene, ethylbenzene, xylene Port~ of Seattle Terminal 108 Environmental Conditions Report MTCA – Model Toxics Control Act FINAL January 23, 2009 Page 56 cPAH – carcinogenic polycyclic aromatic hydrocarbon CSO – combined sewer overflow Ecology – Washington State Department of Ecology EOF – emergency overflow ESA – Environmental Site Assessment na – not applicable Port~ of Seattle Terminal 108 Environmental Conditions Report PAH – polycyclic aromatic hydrocarbon PCB – polychlorinated biphenyl ROW – right-of-way SD – storm drain STP – sewage treatment plant WSLCB – Washington State Liquor Control Board FINAL January 23, 2009 Page 57 4.2.2.2 Diagonal Avenue S ROW The Diagonal Avenue S ROW extends southeastward from E Marginal Way S and terminates at the LDW. It is owned by the City, and public access is allowed. The ROW has been present since at least the 1940s based on review of historical aerial photos (Appendix B). The exact date that the ROW was developed is not known. The street-end is currently used as a hand-boat launch area and park. The Diagonal Avenue S street end may have been used as a trash dumping area until the late 1980s according to Port staff. Cans, broken glass, and other debris were observed in the soil when the area was excavated during installation of the public access area and adjacent T-108 mitigation area. The Diagonal Avenue S SD line is located beneath the ROW, and discharges to the south of the ROW’s terminus. This drainage line is discussed further in Section 4.2.3.3. Four source-tracing solids samples have been collected within the SD system; data for these samples are discussed in Table 4 and presented in Appendix E. 4.2.3 Public outfalls Four public outfalls discharging to the LDW are located in the vicinity of T-108 (Map 2). The Diagonal Avenue S SD is located near the terminus of the Diagonal Avenue S ROW, and the S Nevada Street SD is located on the northern portion of T-106W. Two public outfalls discharge from the terminus of the S Oregon Street ROW: the Duwamish/Diagonal CSO/SD, (owned jointly by the City and the County), and the Duwamish EOF associated with the County-owned Duwamish siphon and pump station. 4.2.3.1 Duwamish/Diagonal CSO/SD and associated drainage basin The Duwamish/Diagonal CSO/SD outfall discharges at the terminus of the S Oregon Street ROW at RM 0.45, approximately 50 ft from the northern portion of T-108. The system has a combined sewer service area of 4,900 ac and the storm drain basin encompasses about 2,620 acres (King County and SPU 2005). The drainage basin includes a 3.6-mi portion of I-5, parts of the Central District, the Duwamish industrial area, Rainier Valley, and Beacon Hill. The stormwater network in the Eastern Parcel of T-108 discharges to this drainage system. The estimated medium-range stormwater runoff from the Duwamish/Diagonal drainage basin is 1,045 million gallons per year (mgy) (King County 2002). Recent source control sampling efforts indicate that the average TSS values for the discharge is approximately 80 mg/L with the TSS loading range from 241 to 414 million tons per year (MT/yr). Between 2002 and 2006, Seattle Public Utilities (SPU) collected in-line sediment from the Diagonal Avenue CSO/SD network in association with the Duwamish/Diagonal sediment remediation effort. During this timeframe, portions of the overall network were cleaned, including the Diagonal Avenue S CSO/SD mainline, the S Dakota Street lateral, and the downstream sections of the 1st Avenue S lateral and the Denver - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 58 Table 4. Summary of relevant information for outfalls adjacent to T-108 OWNERSHIP AND OPERATIONAL HISTORY DRAINAGE BASIN INFORMATION DISCHARGE INFORMATION SOURCE CONTROL ACTIVITIES ENVIRONMENTAL INVESTIGATIONS CHEMICALS IDENTIFIED IN ENVIRONMENTAL MEDIA two source-tracing sediment samples collected (1985) four individual PAHs detected above the CSL and seven detected above the SQS, total HPAHs and total LPAHs detected above the SQS, 1,2dichlorobenzne, 1,4dichlorobenzene, dimethyl phthalate, dibenzofuran, phenol, and 4methylphenol detected above the CSL, and zinc detected above the SQS whole-water stormwater effluent samples collected at two locations (1995) arsenic, cadmium, chromium, copper, lead, mercury, zinc, fluoranthene, pyrene, and phthalates unknown PCBs, TPH, arsenic, lead, mercury, copper, zinc, BEHP, BBP, and PAHs system drainage lines being cleaned periodically; business inspections in drainage basin (2000present)s CITATIONS AVAILABLE ANALYTICAL DATA AND DATA LOCATION Duwamish/Diagonal CSO/SD System installed in the late 1960s in association with the West Point WWTP; the City owns and operates the storm drain system and the County owns and operates the CSO system Port~ of Seattle CSO service area is 4,900 ac in size and includes portions of the Diagonal and Hanford drainage basins, SD basin is 2,600 ac in size; SD basin includes a portion of I-5, and parts of the Central District of Seattle, the Duwamish industrial area; Rainier Valley, and Beacon Hill; outfall located at the S Oregon Street street-end discharges to the LDW via a 144-in concrete outfall; average stormwater discharge of 1,100 mgy (King County 2002); average untreated CSO/EOF event frequency is 0.17 events/yr, with average an annual discharge volume of 0.67 mgy (Nairn 2007; King County 2006) Terminal 108 Environmental Conditions Report multiple rounds of inline sediment solids sampling (2002-2006) FINAL January 23, 2009 Page 59 unknown Ecology (2004a)citing Tetra Tech (1988) Appendix E Ecology (2004a) stormwater effluent data presented in Appendix E King County and SPU (2005) inline sediment solids data presented in Appendix E OWNERSHIP AND OPERATIONAL HISTORY DRAINAGE BASIN INFORMATION DISCHARGE INFORMATION ENVIRONMENTAL INVESTIGATIONS source-tracing sediment sampling was conducted within the CSO/SD basin by SPU; onsite catch basins, right-of-way catch basins, inline sediment trap, and inline sediment grab samples were collected (2002-2007) AVAILABLE ANALYTICAL DATA AND DATA LOCATION CHEMICALS IDENTIFIED IN ENVIRONMENTAL MEDIA SOURCE CONTROL ACTIVITIES arsenic, copper, lead, mercury, zinc, diesel-range hydrocarbons, oil-range hydrocarbons, BEHP, BBP, total PCBs, HPAHs, and LPAHs sourcetracing efforts within the CSO/SD drainage basin Schmoyer (2008) Appendix E na unknown Ecology (2004a) na CITATIONS Duwamish EOF Installed in the late-1960s as part of the EBI system; owned and operated by the County; EOF is connected to the Duwamish Siphon and pump station Port~ of Seattle has the potential to discharge stormwater and combined sewage from the sanitary sewer system if flows from the Duwamish Siphon are too high; outfall located at the S Oregon Street street-end overflows to the LDW only in emergency by-pass situations; has not overflowed since 1989; outfall is 36in in diameter Terminal 108 Environmental Conditions Report unknown FINAL January 23, 2009 Page 60 OWNERSHIP AND OPERATIONAL HISTORY S Nevada Street SD Owned and operated by the City; date of installation not identified DRAINAGE BASIN INFORMATION drains the northern portion of T-106W, including the northern end of the ConGlobal Industries container terminal DISCHARGE INFORMATION discharges to the LDW via a 24-in SD outfall located at the S Nevada Street street-end ENVIRONMENTAL INVESTIGATIONS source-tracing solids sampling within Nevada Street storm drain line (1985); SPU also attempted to sample manholes in the system but either solids were not present in the manholes or manholes were inaccessible Federal Center South Private Outfall (located on the northern portion of property) drainage basin not identified; based on location, assumed to discharges to the Owned and collect drainage from LDW via a 12-in operated by parking areas and metal outfall USACE; date of roof drains on the unknown located to the west northern portion of installation not of Building 1203 identified Federal Center (Map 2) South including parking areas and rooftops Port~ of Seattle Terminal 108 Environmental Conditions Report FINAL CHEMICALS IDENTIFIED IN ENVIRONMENTAL MEDIA SOURCE CONTROL ACTIVITIES CITATIONS cadmium, chromium, and lead detected at concentrations above the CSL, and zinc detected above the SQS in storm drain solids sourcetracing solids sampling Ecology (2004a) citing Tetra Tech (1988); Ecology (2004a); King County and SPU (2005) na unknown Herrera (2004) January 23, 2009 Page 61 AVAILABLE ANALYTICAL DATA AND DATA LOCATION storm drain solids data presented in Appendix E na OWNERSHIP AND OPERATIONAL DRAINAGE BASIN HISTORY INFORMATION Diagonal Avenue SD Owned and operated by City; date of installation not identified system drains approximately 12 ac, including the Diagonal Avenue S roadway west of E Marginal Way S DISCHARGE INFORMATION discharges to the LDW via a 12-in. diameter steel outfall located on the northern portion of the Federal Center South property, adjacent to the south of the Diagonal Avenue S ROW BBP – butyl benzyl phthalate BEHP – bis(2-ethylhexyl) phthalate CB – catch basin CSL – cleanup screening level CSO – combined sewer overflow EBI – Elliott Bay Interceptor Ecology – Washington State Department of Ecology EOF – emergency overflow HPAH – high-molecular-weight polycyclic aromatic hydrocarbon LDW – Lower Duwamish Waterway LPAH- low-molecular-weight polycyclic aromatic hydrocarbon mgy – million gallons per year Port~ of Seattle Terminal 108 Environmental Conditions Report ENVIRONMENTAL INVESTIGATIONS CHEMICALS IDENTIFIED IN ENVIRONMENTAL MEDIA source-tracing solids sample collected (1985) chromium detected above the CSL, zinc, di-n-octyl phthalate, and indeno(1,2,3-c,d)pyrene detected above SQS sediment samples collected offshore of outfall location City attempted to collect manhole solids from system but manhole locations were inaccessible (2005) SOURCE CONTROL ACTIVITIES unknown Ecology (2004a) citing Tetra Tech (1988) Appendix E BEHP and BBP exceeded the SQS unknown (King County 2002); Ecology (2004a) Appendix E na unknown King County and SPU (2005) na na – not applicable PAH – polycyclic aromatic hydrocarbon PCB – polychlorinated biphenyl RCB – right-of-way catch basin ROW – right-of-way SD – storm drain SPU – Seattle Public Utilities STP – sewage treatment plant SQS – sediment quality standard USACE – United States Army Corps of Engineers WSLCB – Washington State Liquor Control Board WWTP – wastewater treatment plant FINAL CITATIONS AVAILABLE ANALYTICAL DATA AND DATA LOCATION January 23, 2009 Page 62 Avenue S lateral. A total of 168 samples were collected from the system’s mainline and contributing lateral lines (as of December 2007), and several of the lines were cleaned out. 4.2.3.2 Duwamish EOF (pump station emergency bypass) The Duwamish EOF is located at the terminus of S Oregon Street ROW approximately 100 ft upstream of the Diagonal Avenue S CSO/SD, and approximately at the northwest corner of T-108. It operates as the emergency overflow for the Duwamish siphon and pump station associated with the King County interceptor system. The Duwamish EOF has not overflowed since 1989, and therefore, Ecology does not consider it a significant source of recontamination to the LDW (Ecology 2004b). 4.2.3.3 Diagonal Avenue storm drain The Diagonal Avenue SD is a 12-in-diameter steel outfall located adjacent to the south of the terminus of the Diagonal Avenue S ROW, approximately 100 ft from the southern end of T-108. The system drains stormwater from approximately 12 acres, including the Diagonal Avenue S roadway west of E Marginal Way S. Most of the area drained by this outfall is paved and used for general roadway access and miscellaneous storage by surrounding property tenants. 4.2.3.4 S Nevada Street storm drain The S Nevada Street SD is a 24-in.-diameter outfall located at the S Nevada Street street end in approximately the center of the T-106W shoreline. The system is owned and operated by the City, and drains stormwater from the northern portion of T-106W, including the northern portion of the ConGlobal container yard. Most of the area drained by this outfall is paved or covered with buildings and is used for storage and transport of cargo and other goods. - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 63 5 Potential Pathways of Contamination and Source Control Management The following section briefly highlights the various pathways through which contaminants can migrate and potentially enter the LDW; sources of contamination can often migrate through more than one potential pathway. This section also provides information on the source control measures and procedures that are either in place or can be incorporated at T-108 to aid in the management of these potential contaminant pathways. The section presents this data in a tabularized discussion with respect to the subject property’s specific concerns relative to source control. 5.1 POTENTIAL PATHWAYS Chemicals released to media such as air, soil, groundwater, or stormwater can migrate within the subject property and potentially to the LDW through various pathways. With respect to the subject property, the pathways of potential concern include atmospheric deposition; stormwater inputs (i.e., direct discharge); groundwater migration, and bank erosion. The following sections briefly discuss the potential pathways of concern at the subject property. 5.1.1 Atmospheric deposition Chemicals have the potential to be emitted to the atmosphere from both point and nonpoint sources. Point sources include various industrial facilities and operations within the greater LDW basin (EPA 2001). T-108 is not currently regulated as a point-source of air emissions (Thomas 2008). Non-point sources include emissions from motor vehicles, marine vessels, and trains, as well as common materials (e.g., plastics) through offgassing. Chemicals emitted to the air may be transported over long distances, generally in the direction of the area’s prevailing winds. Air pollutants can be deposited through either direct or indirect deposition. Direct deposition occurs when contaminated particulates are deposited directly onto the land surface or the surface of a water body. Indirect deposition to water bodies occurs when chemicals are first deposited on land or other water bodies and then transported to the receiving water body via stormwater runoff. Contaminants can adhere to solids on the ground or in stormwater runoff and potentially be transported to LDW sediment. The latter process is a major concern when considering source control within the greater Duwamish Valley; however, it is not expected to play a major role in environmental conditions at T-108. 5.1.2 Stormwater inputs (direct discharge) Contaminants carried in stormwater have the potential to discharge directly into the LDW through public or private outfalls. Several outfalls serve the subject property, - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 64 including connection with the City and County owned Duwamish/Diagonal CSO/SD network. Stormwater traversing across impervious surfaces can pick up chemicals originating from accidental spills (vehicle fueling, maintenance, etc.); leaking equipment or storage tanks; particulates deposited on the subject property through atmospheric deposition; and general commercial/industrial operations. Stormwater runoff in unpaved areas (surface runoff) can also collect materials (soil, debris, etc.) in the flow stream and transport them to other parts of the subject property and potentially into the LDW. 5.1.3 Groundwater migration Groundwater flow in the greater Duwamish Basin is generally towards the LDW, although the direction varies locally depending on the nature of subsurface materials, hydrostratigraphy, local affects of tidal fluctuations, and relative proximity to the waterway. At the subject property, groundwater has been shown to flow radially from a relative high near the center of the site in all directions (pending time of year and tidal stage). Contaminants in groundwater have the potential to migrate directly into the LDW (seeps, shoreline discharge) or through other pathways (infiltration into underground stormwater piping). Leaking or spilled chemicals, as discussed above, can also infiltrate into groundwater in areas without pervious surfaces (western parcel). The determination of whether a chemical identified in groundwater will reach sediment and surface water is a complex process. In this case however, Ecology has acknowledged that recent monitoring has shown that groundwater at the subject property is not considered a potential source of contamination to LDW sediment. 5.1.4 Bank erosion Soil in unprotected shoreline banks is susceptible to erosion by disturbances from human activities, wind, surface water runoff, tidal exchange, and groundwater discharge. Shoreline armoring and vegetation significantly reduce bank erosion, and steeper banks are particularly susceptible. Much of the subject property’s shoreline is armored and covered with vegetation; however, some areas remain susceptible to bank erosion. Contaminants in the subject property’s surficial and subsurface soil (originating from non-native fill or historical site operations, etc.) may exist at elevated concentrations in the shoreline bank. This contaminated material does have the potential to migrate to the waterway. 5.2 HISTORY OF THE DUWAMISH/DIAGONAL SOURCE CONTROL AREA As mentioned in the previous sections, T-108 has been identified as a property of potential concern for source control with respect to the greater Duwamish/Diagonal Source Control Area (SCA). The sediments near the Duwamish/Diagonal outfalls were originally identified as a priority cleanup area by the Elliott Bay/Duwamish Restoration Program in the mid-1990s because of contamination associated with the Duwamish EOF and Duwamish/Diagonal CSO/SD outfalls. The area was identified again through the - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 65 LDW Remedial Investigation as an early action area. Dredging and capping actions were implemented through the Elliott Bay/Duwamish Restoration Program beginning in November 2003. Ecology prepared a SCAP for the Duwamish/Diagonal SCA in December 2004. A sediment remediation project closure report was prepared in 2005 (King County et al. 2005b). Studies conducted in 1994 and 1996 identified PCBs, mercury, BEHP, and BBP as the principal chemicals of concern for the Duwamish/Diagonal SCA area near the outfalls (Ecology 2004a; King County 1997). Table 5 presents the chemicals that have been identified in surface sediment within the Duwamish/Diagonal SCA in-water boundary during the LDW Remedial Investigation effort. The chemicals included on this table had at least one exceedance of its associated SMS criteria for surface sediment, as applicable, prior to sediment removal and capping activities. Table 5. Chemicals of concern in Duwamish/Diagonal SCA surface sediment (exceeding associated SMS criteria) CHEMICAL CHEMICAL CHEMICAL 1,2,4-Trichlorobenzene Bis(2-ethylhexyl)phthalate Mercury 1,2-Dichlorobenzene Butyl benzyl phthalate Naphthalene 1,4-Dichlorobenzene Cadmium N-Nitrosodiphenylamine 2,4-Dimethylphenol Chromium PCBs (total calc'd) 2-Methylnaphthalene Chrysene Pentachlorophenol 2-Methylphenol Dibenzo(a,h)anthracene Phenanthrene 4-Methylphenol Dibenzofuran Phenol Acenaphthene Dimethyl phthalate Pyrene Benzo(a)anthracene Fluoranthene Silver Benzo(a)pyrene Fluorene Total HPAH (calc'd) Benzo(g,h,i)perylene Hexachlorobenzene Total LPAH (calc'd) Benzofluoranthenes (total-calc'd) Hexachlorobutadiene Zinc Benzoic acid Indeno(1,2,3-cd)pyrene Benzyl alcohol Lead Note: Exceedances of the chemicals listed in this table were detected before sediment removal and capping activities were conducted at the Duwamish/Diagonal cleanup area. The Duwamish/Diagonal sediment cleanup project began in 1994; remedial actions occurred in late 2003 and early 2004. Sediment remediation included dredging contaminated sediments from a 7-ac area in the LDW and placing an engineered cap over the remaining sediment. The dredging was conducted between November 2003 and January 2004; the sediment cap was installed between January and March 2004 (see Map 2). A follow-up action was conducted in February 2005 involving the placement of a thin layer of sand around the dredged area in response to elevated chemical concentrations resulting from the previous dredging activity (Ecology 2004a) (Map 2). - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 66 Long-term sediment monitoring began in the summer of 2004 and is currently scheduled to continue until 2014. In samples collected as part of the monitoring program between June 2004 and April 2007, BEHP, BBP, fluoranthene, dimethyl phthalate, benzyl alcohol, benzoic acid, and total PCBs exceeded the SQS, and BEHP, total PCBs, benzyl alcohol, and benzoic acid also exceeded the CSL. 5.3 SOURCE CONTROL MANAGEMENT TOOLS A wide variety of source control management tools are available for use at the subject property. These tools vary greatly in management and application, but all are aimed to help reduce or eliminate the potential impact from contaminant sources and their associated pathways on the subject property. In many instances, the components of these tools and source control measures overlap with one another in their intent or physical application. An effective long-term source control strategy will require incorporation of a mixture of these options, with specific focus on the operations at the subject property and types of contamination and pathways of concern. Some of these tools are already in place at the subject property; nevertheless, further consideration of additional application of these tools would continue to promote the goal of an effective, long-term source control strategy at the subject property. This strategy would include the compliance monitoring necessary to determine the effectiveness and performance of these tools. Regulatory and compliance programs overseen by federal, state, and local jurisdictions offer numerous possible tools that could be implemented at the subject property under various circumstances. Table 6 presents a list of some of the available and relevant tools and source control measures that will be combined to establish and promote effective source control at the subject property. Many other source control tools exist and may be applicable to the site, especially with changes in operations or future development activities. For example, programs managed under the Toxic Substance Control Act (TSCA) could be applicable if hazardous waste associated with the former PCB disposal pits is encountered during site improvement work. Additionally, if future operations generated wastewater requiring off-site treatment, King County’s Industrial Waste pretreatment authorizations would represent an additional source control tool. Table 6 is not meant to be a comprehensive list of all tools available but those most appropriate for the current conditions and operations at the subject property. Table 6. Potential source control management tools for the subject property SOURCE CONTROL TOOLS Regulatory and Compliance Programs - Port=of5eattle TOOL COMPONENTS NDPES Permit Programs ADDITIONAL INFORMATION ON POTENTIAL USE OR APPLICATION Municipal Permit - Port of Seattle. Includes Stormwater Management Planning, tenant education and oversight, and O&M programs. General Industrial Permit – ConGlobal. Includes requirements for preparation and management of a SWPPP and SPCC for operational areas. Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 67 SOURCE CONTROL TOOLS Environmental investigation Remediation Programs Operational/ Behavioral Best Management Practices (BMPs) Physical BMPs Capital Improvements Engineering Controls Institutional Controls TOOL COMPONENTS Port of Seattle Compliance Programs and Tenant Lease Arrangements ADDITIONAL INFORMATION ON POTENTIAL USE OR APPLICATION Port’s internal compliance unit inspects for environmental compliance based on environmental regulations and lease agreements. LDW Source Control Work Group (SCWG) Coordination Coordination with long-term strategy of SCWG and associated programs (Puget Sound Initiative, Urban Waters Initiative, etc.). Multi-media characterization Additional media information (subsurface, bank soil, etc.) to fulfill data gaps and focus effective environmental strategy. Independent removal action (excavation, etc.) Soil excavation with performance sampling in coordination with voluntary cleanup program Containment Capping for in-place containment of impacted media In-situ treatments In-situ treatment of areas of impacted subsurface soil Monitored natural attenuation Monitoring of existing environmental conditions to satisfy cleanup goals Public Involvement/Education Education and communication of source control concerns with tenants and public users to support compliance and promote overall environmental stewardship. Good housekeeping practices Promote environmentally-friendly operational and behavioral practices of those using the subject property. Construction BMPs (permanent and temporary) Erosion and runoff controls, sediment controls (vegetative buffer, drainage swales), grading improvements, hay bale buffers, catch basin filter socks, etc. Redevelopment BMPs Habitat restoration, porous pavement, green roof technologies. Utility upgrades and improvements Upgrades to stormwater collection networks and other underground utility systems, upgrades to onsite pretreatment, etc. Infrastructure improvements Paving, grading, access concerns, bank/shoreline stabilization, etc. Tenant-driven improvements Improvements in tenant areas (either operational or compliance driven) Restoration opportunities Construction of restoration/mitigation areas along shoreline; with potential link to existing habitat area Operation and Maintenance programs Proper operation and maintenance of equipment used on property can greatly reduce the potential for accidently spills and leaks. Upgrades to newer “greener” equipment Use of newer, “greener” equipment technologies could greatly reduce the potential impact from onsite operations. Property deed restrictions Restriction of long-term use of property to help ensure environmental stewardship. Tenant restrictions Restrictions on operational use of tenant lease areas Again, the tools highlighted in Table 6 are not inclusive of all of the options available for approaches to source control management, but are focused to a relative extent on measures that can be implemented at the subject property. Depending on the specific aspects of the contaminant and/or pathway of concern, different components of the tools mentioned may be more appropriate for evaluation and implementation. This - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 68 evaluation process will be an important aspect of the SCSPs that will be prepared after finalization of this documentation. One of the major tools available to help assess and manage stormwater concerns at the subject property is the NPDES permit program. As discussed in previous sections, stormwater discharges at T-108 are regulated under two NPDES permits: the Municipal Stormwater permit, under which the Port of Seattle is a secondary permittee, and the industrial stormwater general permit recently obtained by the tenant, ConGlobal Industries, in April 2008. As required under the permit, the Port of Seattle has implemented a Stormwater Management Program (SWMP) that includes: • an education program, including training on Best Management Practices (BMPs), for tenants and Port employees aimed at reducing behaviors and practices that can adversely affect stormwater quality • a program to identify, eliminate, and prevent illicit discharges and spills to the stormwater system • a program of information gathering that allows for adequate stormwater management planning, priority setting, and program evaluation including maps of properties, drainage basins, stormwater conveyance lines, and outfalls • a program for documenting operation and maintenance activities for stormwater facilities • field inspections to inspect for illicit discharges at all known outfalls covered under the permit; at least one third of all outfalls should be inspected each year • procedures for removing illicit discharges and documenting activities associated with monitoring these discharges • a spill response plan • a program for management of construction site stormwater runoff and postconstruction stormwater management for new development and redevelopment • an operation and maintenance program for all catch basins, stormwater treatment, and flow control facilities • a long-term monitoring program to characterize stormwater runoff at a limited number of locations1, evaluate stormwater management practices, and evaluate BMPs 1 The facility selected for monitoring under the Port’s SWMP is used for different operational purposes than T-108 and is not located in the LDW; monitoring data from this facility will most likely not be directly applicable to conditions at T-108. - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 69 These elements of the Port’s SWMP are aimed to help in the protection of stormwater quality at all Port terminals and facilities, including T-108. As of April 2008, ConGlobal has maintained a general industrial NPDES stormwater permit (No. SO3-010569) and a SWPPP for management of stormwater discharges from the container terminal to the Duwamish/Diagonal CSO/SD system. The chassis repair area and equipment fueling areas on the Eastern Parcel are covered by the NPDES permit and SWPPP; the portions of T-108 used only for storage, office space, and parking are not covered. As part of the general industrial stormwater permit, ConGlobal: • maintains an SPCC plan to be implemented in the case of a hazardous materials release • implements BMPs to reduce stormwater pollution • inspects the stormwater system infrastructure • samples stormwater and analyzes samples for total zinc, oil and grease, turbidity, total suspended solids (TSS), and pH, as well as total copper and total lead if the benchmark for zinc is exceeded during two consecutive sampling events • provides discharge monitoring reports to Ecology to report the results of the inspection and sampling program As with the Port’s program, ConGlobal’s NPDES permit, SWPPP, and SPCC plan are in place to reduce the potential for stormwater contamination resulting from industrial activities conducted at the facility. While the permit and plans limit and control the discharge of a number of pollutants, they do not necessarily control contaminants that pose a threat to LDW sediments, such as PCBs, phthalates, arsenic, mercury, and PAHs (Thomas 2008). The combinations of these established regulatory and compliance requirements with the other “grab bag” of tools presented in Table 6 (BMPs, remediation programs, capital improvements, institutional controls, etc.) will be further evaluated in the following sections with respect to their potential application and use at the subject property to lessen or potentially eliminate the threat from the potential pathways of contamination. 5.4 T-108 ONSITE POTENTIAL PATHWAYS OF CONTAMINATION AND SOURCE CONTROL Several potential onsite contaminant migration pathways were identified at the subject property through the completion of the environmental conditions review effort. Controlling these potential pathways and sources can decrease the potential for them to impact other media on the property or ultimately the LDW. Many of these identified pathways and their associated contaminant sources can be either eliminated entirely or controlled to some degree through implementation of various source control tools and - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 70 procedures and adherence to the requirements of regulatory programs currently governing operations at the subject property. Table 7 provides information on the potential pathways and sources of contamination identified on the T-108 property, and briefly identifies the various source control tools (with reference to those discussed in Table 6) that are either in place or that can be implemented to help control each pathway. Not all pathways and corresponding chemical sources have the same relative potential for impact to area media and the LDW. The table provides general information on chemicals that can be potentially associated with each source type. Information on the table takes into consideration both historical source areas and potential ongoing sources based on the current conditions of the property, and expected long-term tenant operations (cargo container storage, chassis storage and repair, miscellaneous maintenance). The table also provides general information on data gaps related to these potential pathways and sources. Fulfilling these data gaps may require further study or characterization to more fully understand their potential for contributing contaminants to the LDW, as well as options for controlling them. - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 71 Table 7. POTENTIAL PATHWAY Potential onsite pathways of contamination and general source control information at T-108 POTENTIAL SOURCES GENERAL OPTIONS AND TOOLS FOR ADDITIONAL PATHWAY CHARACTERIZATION OR SOURCE CONTROL (REFER TO TABLE 6) POTENTIAL CONTAMINANTS DETAILS DATA GAP WESTERN PARCEL EASTERN PARCEL • Air Emissions from operational equipment Metals, phthalates, dioxins/furans, particulates Equipment and machinery used by the current tenants are of similar use as most commercial operations in the greater Duwamish Valley (trucks, etc.). Data on air emissions in the greater Duwamish Valley are very limited; additional data would be helpful in further assessing pathway but difficult to associate directly with T-108 concerns. • • • Stormwater Spills, leaks, and accidental discharges; onsite dust and debris Metals, PAHs, PCBs, TPH, VOCs, SVOCs Current information on stormwater quality limited. ConGlobal’s NDPES sampling requirements will provide some additional information to assist in ongoing assessment of this potential contaminant pathway. • • • • Operations include chassis and miscellaneous maintenance; chemicals have the potential to enter stormwater system and discharge to LDW via the Duwamish/Diagonal CSO/SD (Eastern Parcel) and Port private storm drains (Western Parcel). Regulatory and Compliance Programs – Stormwater monitoring results can help assess impact from atmospheric deposition. Operational BMPs – Good housekeeping and environmental stewardship education can help limit impact from air emissions. Engineering Controls – Newer “greener” machinery can help reduce onsite emissions. • • • Regulatory and Compliance Programs – Stormwater monitoring results, although limited for this area, can help assess impact from stormwater runoff. Operational BMPs – Good housekeeping and environmental stewardship education can help reduce introduction of contaminants to stormwater. Physical BMPs – Erosion and runoff control, and vegetative barriers can help limit transport of contaminants in stormwater. Capital Improvements – Paving and utility upgrades (installation of stormwater infrastructure) would help management stormwater issues in this area. • • • • Regulatory and Compliance Programs – Stormwater monitoring results can help assess impact from atmospheric deposition. Operational BMPs – Good housekeeping and environmental stewardship education can help limit impact from air emissions. Engineering Controls – Newer “greener” machinery can help reduce onsite emissions; effective operation and maintenance of equipment can also reduce emissions. Institutional Controls – Deed and tenant restrictions can limit operations that produce harmful emissions. Regulatory and Compliance Programs – Adherence to requirements of the Port’s and ConGlobal’s permit (proper materials storage/handling, inspection and oversight, etc.) will help manage stormwater concerns in this area. Operational BMPs – Good housekeeping and environmental stewardship education can help reduce introduction of contaminants to stormwater. Physical BMPs – Hay bale buffers, catch basin filter socks, etc., can help prevent accidental spills from affecting stormwater. Institutional Controls – Deed and tenant restrictions can limit potential operations in this area. Table 7, cont. POTENTIAL PATHWAY POTENTIAL SOURCES Potential onsite pathways of contamination and general source control information at T-108 GENERAL OPTIONS AND TOOLS FOR ADDITIONAL PATHWAY CHARACTERIZATION OR SOURCE CONTROL (REFER TO TABLE 6) POTENTIAL CONTAMINANTS DETAILS DATA GAP WESTERN PARCEL • • Stormwater Contaminants in fill material Miscellaneous Large portions of the subject property have been filled over time, using both native and non-native materials. These fill materials can infiltrate into underground piping. Soil data available for site; additional soil data would provide little new information relevant to the tools used to manage this potential contaminant pathway. • • • • Stormwater Sludges and general STPrelated materials and PCBcontaminated materials from the 1974 spill remain in place TPH, PCBs, metals, household/ industrial chemicals Much of the area comprising the former treatment plant and PCB-material treatment/disposal area is covered by pavement. Areas in the western parcel that overlay former STP units are unpaved. Additional soil data would provide further understanding of where STP-or PCB spill-related materials remain on site; however, this additional information will add little to support the tools available for managing these lingering materials. • • • • Port~ of Seattle Terminal 108 Environmental Conditions Report FINAL Regulatory and Compliance Programs – Stormwater monitoring results, although limited for this area, can help assess impact from impacted fill material. Environmental Investigation – Additional characterization could assess volume and potential impact from contaminated fill in this area. Remediation Programs – Soil excavation, containment, or in-situ treatment could help manage contaminants in fill material. Physical BMPs – Erosion and runoff controls, sediment controls, and vegetative buffers would aid in management of this pathway. Capital Improvements – Paving and utility upgrades (installation of stormwater infrastructure) would help management potential impact to stormwater in this area. Regulatory and Compliance Programs – Stormwater monitoring results, although limited for this area, could help assess impact from remaining impacted materials. Environmental Investigation – Additional characterization could assess volume and potential impact from remaining contaminated materials in this area. Remediation Programs – Soil excavation, containment, or in-situ treatment could help manage remaining contaminants in these materials. Physical BMPs – Erosion and runoff controls, sediment controls, and vegetative buffers would aid in management of this pathway. Capital Improvements – Paving and utility upgrades (installation of stormwater infrastructure) would help management potential impact to stormwater in this area. January 23, 2009 Page 73 EASTERN PARCEL • • • • Regulatory and Compliance Programs – Stormwater monitoring results could help assess impact from contaminated fill materials in this area; however, upgraded stormwater network at higher elevation than areas of suspected fill; potential impact from this pathway is unlikely. Environmental Investigation – Additional characterization in this area could assess volume and potential impact from contaminated fill in this area; however, investigation would greatly affect ongoing operations and would not likely provide information useful for practical management of this potential pathway. Regulatory and Compliance Programs – Stormwater monitoring results could help assess impact from remaining contaminated materials in this area; however, upgraded stormwater structure at higher elevation than suspected materials; potential impact from this pathway is unlikely. Environmental Investigation – Additional characterization in this area could assess volume and potential impact from STP/PCB-treatment related contamination in this area; however, investigation would greatly affect ongoing operations and would not likely provide information useful for practical management of this potential source concern. Table 7, cont. POTENTIAL PATHWAY POTENTIAL SOURCES Groundwater migration Contaminants in groundwater on the subject property have the potential to migrate directly to the LDW or via underground piping/infiltration. Potential onsite pathways of contamination and general source control information at T-108 GENERAL OPTIONS AND TOOLS FOR ADDITIONAL PATHWAY CHARACTERIZATION OR SOURCE CONTROL (REFER TO TABLE 6) POTENTIAL CONTAMINANTS TPH compounds, metals DETAILS DATA GAP WESTERN PARCEL Sampling results indicated that TPH, metals, PCBs, and PAHs were present at some level in onsite groundwater, however at levels below MTCA standards. Recent groundwater sampling has been conducted; available data establishes that pathway is not of impact concern at the subject property; additional data not required. Recent groundwater investigations have allowed Ecology to determine that groundwater at the subject property is not a pathway for recontamination of LDW sediment. Nevertheless, capital improvements to address other potential pathways (i.e., stormwater) will greatly reduce infiltration and migration potential. EASTERN PARCEL Recent groundwater investigations have allowed Ecology to determine that groundwater at the subject property is not currently a pathway for recontamination of LDW sediment. • Groundwater migration Chemicals spilled or leaked on impervious areas have the potential to infiltrate into migrating groundwater TPH compounds, metals, PCBs, PAHs, and SVOCs Operations being completed in areas currently unpaved (storage) do not indicate a major threat for accidental spills and leaked chemicals that could enter groundwater. Given conditions of areas of operation, impact from these sources would likely affect stormwater prior to any influence over area groundwater; additional groundwater data not required. • • Operational BMPs – Good housekeeping and environmental stewardship education could help reduce the potential future introduction of contaminants to groundwater. Capital Improvements –Paving, grading, and utility improvements (stormwater network installation) would greatly limit future infiltration of stormwater into subsurface groundwater and prevent these spilled materials from being transported via groundwater. • • • Groundwater migration Contaminated fill material beneath subject property or in former tidal drainage channel Port~ of Seattle Miscellaneous sewage and industrial wastes Large portions of the subject property have been filled over time including the former drainage channel, using both native and non-native materials. These fill materials can infiltrate into migrating groundwater Terminal 108 Environmental Conditions Report Additional soil information gathered to ascertain location and quality of fill materials would be helpful; however, the information would add little to implementation of the tools most effective to address potential lingering contamination. FINAL • • Remediation Programs –Containment or in-situ treatment could help manage potential future impact to groundwater from contaminants in fill material. Capital Improvements – Paving and utility upgrades (installation of stormwater infrastructure) would help prevent future infiltration of stormwater into impacted fill material which may mobilize contaminants to groundwater. January 23, 2009 Page 74 • Regulatory and Compliance Programs – Adherence to requirements of the Port’s and ConGlobal’s permit (proper materials storage/handling, inspection and oversight, etc.) will help limit potential future impact to groundwater; although the majority of this area is paved and managed by an updated stormwater network installed above the water table. Operational BMPs – Good housekeeping and environmental stewardship education can help reduce the potential for future introduction of contaminants from spills and leaks. Engineering Controls – Proper operation and maintenance of machinery can limit accidental spills and leaks. Institutional Controls – Deed and tenant restrictions can limit potential operations in this area. Environmental Investigation – Additional characterization in this area could assess volume and potential future impact to groundwater from contaminated fill in this area; however, investigation would greatly affect ongoing operations and provide little information for a pathway previously determined to be of minimal concern. Table 7, cont. POTENTIAL PATHWAY POTENTIAL SOURCES Sludge materials remaining in place from historical STP or PCB spill treatment operations Groundwater migration Potential onsite pathways of contamination and general source control information at T-108 GENERAL OPTIONS AND TOOLS FOR ADDITIONAL PATHWAY CHARACTERIZATION OR SOURCE CONTROL (REFER TO TABLE 6) POTENTIAL CONTAMINANTS TPH, PCBs, metals, household/ industrial chemicals DETAILS DATA GAP Much of the area comprising the former STP and PCB-spill treatment areas is covered by pavement. Areas in the Western Parcel that overly former STP units are unpaved. Additional groundwater data would provide further understanding of STP- and PCB treatment-related materials; however, groundwater determined not to be a potential source at the subject property and additional data would not benefit application of practical tools to address lingering contamination. WESTERN PARCEL • • • • Bank erosion Contaminated bank sediment can erode directly into the LDW (surface water runoff, tidal exchanges, etc.) PCBs, metals, TPH compounds, PAHs, phthalates, phenol, benzoic acid, 1,2dichlorobenzene Areas of the subject property shoreline are unarmored, or existing armoring/vegetation are not providing stability as designed. Little shoreline bank data are available; further sampling of the bank would provide useful information and help focus long-term environmental strategy. • • • EASTERN PARCEL Environmental Investigation – Additional characterization in this area could assess volume and potential future impact to groundwater from contaminated materials in this area. Remediation Programs –Containment or in-situ treatment could help prevent future stormwater infiltration that may mobilize contaminants remaining in these materials into groundwater. Capital Improvements – Paving and utility upgrades (installation of stormwater infrastructure) would help prevent future infiltration of stormwater that may mobilize contaminants in these materials into local groundwater. Environmental Investigation – Additional characterization of bank soil is necessary to provide information to formulate an effective strategy for this area. Remediation Programs – Soil removal and/or containment would greatly reduce the potential impact from this pathway. Physical BMPs – Erosion and runoff controls and vegetative buffers would help reduce potential impact from this pathway to LDW sediment. Capital Improvements – Infrastructure improvements (paving, grading, containment, and shoreline stabilization, etc.) would greatly reduce potential impact from this pathway. Restoration opportunities along the shoreline would promote longterm environmental stewardship. • Environmental Investigation – Additional characterization in this area could assess volume and potential future impact to groundwater from STP/PCB spill treatment related contamination in this area; however, investigation would greatly affect ongoing operations and would not likely provide information useful for practical management of this pathway already determined to be of minimal concern. Not applicable BMP – best management practice PAH – polycyclic aromatic hydrocarbon SWPPP – stormwater pollution prevention plan CSO – combined sewer overflow PCB – polychlorinated biphenyl TPH – total petroleum hydrocarbons LDW – Lower Duwamish Waterway SD – storm drain VOC – volatile organic compound NPDES – National Pollutant Discharge Elimination System STP – sewage treatment plant Port~ of Seattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 75 The potential pathways and associated source information in Table 7 provide a general overview of the contaminant dynamics currently of potential issue at the subject property. Planning and management of ongoing and future source control programs at the subject property will be discussed in greater length in the subsequent SCSP documentation to be completed upon finalization of this Environmental Conditions Report. 5.5 OFFSITE POTENTIAL PATHWAYS OF CONTAMINATION Contamination documented at adjacent properties also has the potential to migrate into and through the subject property. Some of this documented environmental contamination was discussed in Section 4.2; data summaries for many of these facilities are provided in Appendix E. Since these pathways are outside of the T-108 property boundary, options for control or elimination of these sources and pathways are highly limited. However, source control management practices, standard operating procedures, and existing permit monitoring requirements can be utilized to greatly reduce the potential impact from these offsite sources. Table 8 highlights some of the potential offsite sources and the routes of migration onto the subject property. As with the information included in Table 7, the information in this table will be used to assist in the planning and management of ongoing and future source control programs at the subject property to be discussed in the upcoming SCSP documentation. - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 76 Table 8. POTENTIAL PATHWAY Potential offsite sources of contamination and pathway information relative to T-108 GENERAL OPTIONS AND TOOLS FOR ADDITIONAL PATHWAY CHARACTERIZATION OR SOURCE CONTROL (REFER TO TABLE 6) POTENTIAL POTENTIAL SOURCES CONTAMINANTS DETAILS DATA GAP Metals, phthalates, dioxins/furans, particulates Subject property located in large industrial area; neighboring facilities (e.g., Ash Grove Cement) have documented releases to the atmosphere above regulatory standards; emissions can migrate through stormwater and groundwater pathways. • Emission from neighboring industrial facilities depositing on site Air Data on air emissions in the greater Duwamish Valley are very limited; additional data would be helpful in further assessing pathway but difficult to associate directly with T108 concerns. • • Stormwater Spills, leaks, and accidental discharges from neighboring facilities Metals, PAHs, PCBs, TPH, VOCs, miscellaneous chemicals Contaminants from operations at adjacent terminal properties, truck traffic, and general ROW activities have the potential to migrate through stormwater runoff or sheet flow and into the drainage networks serving the subject property. Monitoring information from adjacent Port properties (as applicable to their permit) and other potential monitoring data from local property owners (as available) can be assessed for potential impacts to the subject property; however, available data will likely be very limited. • • • Stormwater Port~ of Seattle Contaminants from indirect atmospheric deposition, dust and particulates Metals, phthalates, dioxins/furans, particulates As mentioned above, contaminants deposited via indirect atmospheric deposition onto the subject property can be transported to the LDW through the stormwater pathway. Terminal 108 Environmental Conditions Report Data on air emissions in the greater Duwamish Valley are very limited; additional data would be helpful in further assessing pathway but difficult to associate directly with T108 concerns. FINAL • Regulatory and Compliance Programs – Review and consideration of greater Duwamish Valley stormwater monitoring results can provide insight as to the level of impact from atmospheric deposition. Ongoing coordination with the SCWG can provide valuable information on strategies within the greater Duwamish Valley to assess and manage impacts from atmospheric deposition. Operational BMPs – Good housekeeping and environmental stewardship education can aid in the identification by subject property workers of potential offsite air emissions issues. Regulatory and Compliance Programs – Coordination with other NPDES permittees and with the efforts of the SCWG can provide useful information on assessing potential for impact to the subject property from contaminated stormwater originating offsite. Operational BMPs – Good housekeeping and environmental stewardship education can help subject property workers identify concerns in advance of potential impact to the site. Physical BMPs – Hay bale buffers, catch basin filter socks, silt screens, etc., can help limit the introduction of contaminants transported to the site from offsite stormwater. Regular cleaning of the catch basin and the stormwater networks can prevent impacted materials from entering the LDW through the stormwater pathway. Regulatory and Compliance Programs – Review and consideration of greater Duwamish Valley stormwater monitoring results can provide insight as to the level of impact from atmospheric deposition. Ongoing coordination with the SCWG can provide valuable information on strategies within the greater Duwamish Valley to assess and manage impacts from atmospheric deposition. Operational BMPs – Good housekeeping practices (pavement sweeping, catch basin cleanout, etc.) can help prevent contaminants in atmospheric materials from entering the stormwater network. January 23, 2009 Page 77 POTENTIAL PATHWAY GENERAL OPTIONS AND TOOLS FOR ADDITIONAL PATHWAY CHARACTERIZATION OR SOURCE CONTROL (REFER TO TABLE 6) POTENTIAL POTENTIAL SOURCES CONTAMINANTS DETAILS DATA GAP • Stormwater Contaminants carried to the subject property from offsite by trucks, miscellaneous equipment, and in cargo containers, etc. Metals, PAHs, PCBs, TPH, miscellaneous chemicals Tenant operations involve management of trucks, chassis, and cargo containers that could potentially introduce contaminants to the subject property from other locations. Information on potential contaminants that can be brought to the site via truck traffic, etc. is very limited. Additional data would be helpful but would be difficult to assign specifically to potential T108 concerns. • • Groundwater migration Contaminants in groundwater in properties outside the T-108 subject property (i.e., S Oregon Street ROW) have the potential to migrate onto the subject property TPH compounds, metals, miscellaneous chemicals Results of sampling in the S Oregon Street ROW indicated soil and/or groundwater impacted with PCBs, metals, TPH compounds, and PAHs Additional coordination and assessment of neighboring groundwater monitoring programs will provide necessary, if likely limited, information on overall groundwater quality in the area of the subject property. • Regulatory and Compliance Programs – Permit required monitoring could be used to assess potential impact from offsite materials deposited on the subject property and transported into the stormwater pathway. However, differentiation between onsite contributions and those introduced by offsite equipment would be very difficult to ascertain. Operational BMPs – Good housekeeping practices (pavement sweeping, catch basin cleanout, etc.) and an established equipment/truck washing program in a dedicated area at the subject property (with appropriate wash-water collection systems) would be the most practical way of addressing this potential contaminant pathway at the subject property. Environmental Investigation – Additional characterization of groundwater conditions around the perimeter of the subject property would provide useful information on the quality of groundwater potentially entering the property; however, groundwater flow patterns in many areas of the subject property have been shown to be existing the subject property toward neighboring facilities. Remediation Programs – In-situ treatment of groundwater at the property boundary, or potential containment pumping of impacted groundwater would limit its influence on subsurface groundwater conditions at the site; however, given the level of contamination identified to date, this is an expensive and relatively impractical approach to address this potential pathway of concern. BMP – best management practice LDW – Lower Duwamish Waterway NPDES – National Pollutant Discharge Elimination System PAH – polycyclic aromatic hydrocarbon PCB – polychlorinated biphenyl ROW – right-of-way SWPPP – stormwater pollution prevention plan TPH – total petroleum hydrocarbons VOC – volatile organic compound Port~ of Seattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 78 6 Conclusions and Recommendations Terminal 108 has had numerous owners and operators over the course of the last hundred years. Operations have included wastewater/stormwater treatment, materials storage and transfer, PCB-contaminated sediment treatment and disposal, and most recently container and chassis storage and miscellaneous maintenance efforts. Upgrades and improvements to subject property infrastructure have occurred with each change of operation at the site and have greatly influenced the overall shape and layout of the subject property. This diverse operational history has created a complex list of potential environmental concerns that must be considered in the formulation and implementation of an effective long-term source control strategy. Numerous source control tools and management procedures are available for consideration and incorporation into an effective strategy for the subject property. Requirements of a variety of regulatory and compliance programs, many already applicable to operations at the subject property (NPDES permits, etc.), can be utilized to reduce and potentially eliminate contaminants from impacting the subject property while at the same time assessing potential impacts from other onsite and offsite sources. Focused characterization efforts and remediation programs can potentially remove or contain impacted media at the subject property while operational and physical BMPs (good housekeeping practices, worker education, erosion control, etc.) can be incorporated as standard operating procedure at the subject property. Most importantly capital improvement initiatives (utility upgrades, paving, infrastructure improvements, etc.) can greatly reduce the potential for impact from upland sources to LDW sediment. Environmental media at the subject property (i.e., surface and subsurface soil, groundwater) have been sampled and analyzed for the last three decades. Impacted soil at the subject property may have originated from past onsite operations (wastewater treatment, PCB-impacted sediment treatment and disposal) or may have been brought to the site during filling and grading historically associated with the construction of the LDW. Although the continued characterization and potential remediation (i.e., excavation) of these impacted materials should be considered for the site (especially in consideration of bank soil in the Western Parcel), current and long-term operational use at the subject property makes this approach practical for only small portions of the site. With these considerations, ongoing infrastructure improvements and applicable engineering controls (paving, containment, etc.) are a more practical and effective strategy for the subject property. Recent groundwater investigation reports for the subject property (Pacific Groundwater Group 2006b, 2007a) have indicated that low concentrations of contaminants have been identified in samples, but at reporting levels below relevant regulatory cleanup standards. Subsequent to this reporting, Ecology acknowledged that groundwater at T- - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 79 108 is not currently considered as a potential source for impact to neighboring LDW sediment. Nevertheless, groundwater migration potential (from onsite and offsite) must be considered if a long-term source control strategy implemented at the site is to be effective. The stormwater pathway’s potential to transport contaminants across the subject property and to the LDW will need to be a chief focus during development and implementation of an effective source control strategy. Stormwater has the potential to transport a wide array of contaminants whose origins are from both onsite (spills, leaks, accidental discharges, etc.) and offsite (atmospheric deposition, runoff from adjacent properties, etc.). Numerous options are available to help reduce this pathway’s potential of impact including the aspects of the existing NPDES programs (education, spill prevention, proper materials handling and storage, and inspection and oversight). Adherence to the requirements of the Port’s and tenant’s NPDES permits will reduce the potential for chemicals to leave the property and impact the LDW. Nevertheless, source control programs will only be effective if they consider the “big picture,” including understanding potential future uses of the property (both by its tenants and owner), and the potential for outside sources and pathways to impact the subject property. The understanding of the current conditions of the subject property provided in this documentation, including (but not limited to) the property’s geology, hydrogeology, historical operations and practices, environmental investigation history, and future development plans (as applicable) will have to be considered in order to develop an effective strategy for the site. The SCSPs that will now be completed will expand upon the information included in this documentation (particularly concerning potential pathways and selected source control measures/tools) and provide an overall strategy for continued source control management at the subject property. The plans will take into consideration the regulatory requirements already established as well as other measures and techniques that can be used to ensure that the strategies are proactive and can adjust to the potential changing operational and environmental conditions of the subject property. - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 80 7 References Aerial Photo Publishers. 1946. Aerial survey of T4N, R3E and 4E: T-108 and vicinity. Publisher: Aerial Photo Publishers, Seattle, WA. Accessed at the Map Collection and Cartographic Information Services Unit, University of Washington Libraries, Seattle, WA. AGI. 1992a. Site assessment summary, site 64534097, 4525 Diagonal Avenue South, Seattle, Washington. Prepared for Chevron USA Products Company. Applied Geotechnology, Inc., Bellevue, WA. AGI. 1992b. Supplemental site investigation, Chevron USA Site 64534097, 4525 Diagonal Avenue South, Seattle, Washington. Prepared for Chevron USA Inc. Applied Geotechnology, Inc., Bellevue, WA. Anchor. 2007. Duwamish/Diagonal sediment remediation project 2005 monitoring report: Elliott Bay/Duwamish restoration program panel. Panel publication 40. Prepared for King County Department of Natural Resources and Parks Elliot Bay/Duwamish restoration program. Anchor Environmental, L.L.C., Seattle, WA. Blomberg G. 2008. Personal communication (telephone conversation with Jenny Buening, Windward Environmental, regarding former Lafarge facilities on T-108 property). Port of Seattle, Seattle, WA. June 4, 2008. Booth D, Herman L. 1998. Duwamish industrial area hydrogeologic pathways project: Duwamish basin groundwater pathways conceptual model report. Prepared for City of Seattle Office of Economic Development and King County Office of Budget and Strategic Planning. Produced by Hart Crowser, Inc., Seattle, WA. Brown and Caldwell. 1958. Metropolitan Seattle sewerage and drainage survey: A report for the City of Seattle, King County and the State of Washington on the collection, treatment and disposal of sewage and the collection and disposal of storm water in the metropolitan Seattle area. Brown and Caldwell Consulting Engineers, Seattle, WA. Container Care International. 1993. Letter dated December 9, 1993 from Bob Bunch to J. Sizemore, Port of Seattle, regarding pollution prevention plan and contingency plan. Container-Care International, Inc., Seattle, WA. Dames & Moore. 1984. Progress report, consultation, soil and water test results, Duwamish Waterway property, Seattle, Washington, for Chiyoda International Corporation. June 25, 1984. Dames & Moore, Seattle, WA. Dames & Moore. 1988. Report of geotechnical investigation, Port of Seattle-Terminal 108 site, Seattle, Washington. Prepared for LaFarge Canada, Inc. Dames & Moore, Seattle, WA. - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 81 Dames & Moore. 1992. Preliminary design and cost estimate, proposed develoment for container care, Terminal 108/Chiyoda, Seattle, Washington. Prepared for the Port of Seattle. Dames & Moore, Seattle, WA. Ecology. 1987. Water quality certification, Public Notice no. 071-OYB-2-010439-R. Letter to Port of Seattle from M.F. Palco, Environmental Review, dated February 19, 1987. Washington Department of Ecology, Olympia, WA. Ecology. 2004a. Lower Duwamish Waterway source control action plan for the Duwamish/Diagonal Way early action cleanup. No. 04-09-003. Washington Department of Ecology, Northwest Regional Office, Toxics Cleanup Program, Bellevue, WA. Ecology. 2004b. Lower Duwamish Waterway source control strategy. No. 04-09-043. Washington Department of Ecology, Northwest Regional Office, Toxics Cleanup Program, Bellevue, WA. Ecology. 2008. Property review: Federal Center South. Early Action Area 1, Duwamish/Diagonal combined sewer overflow/storm drain Washington Department of Ecology, Olympia, WA. EPA. 1975. Region 10 On-Scene Coordinator’s report on the Duwamish Waterway PCB spill on September 13, 1974. US Environmental Protection Agency, Region 10, Seattle, WA. EPA. 2001. Frequently asked questions about atmospheric deposition. EPA-453/R01/009. Office of Wetlands, Oceans, and Watersheds and Office of Air Quality Planning and Standards, US Environmental Protection Agency, Washington, DC. Herrera. 2001. Phase I environmental site assessment, Federal Center South, Seattle, Washington. Herrera Environmental Consultants, Inc., Seattle, WA. Herrera. 2004. Summary report, Lower Duwamish Waterway outfall survey. Prepared for Seattle Public Utilities. Herrera Environmental Consultants, Inc., Seattle, WA. King County. 1997. Duwamish/Diagonal site assessment report. Prepared for Elliott Bay Duwamish Restoration Program. King County Department of Natural Resources, Seattle, WA. King County. 2002. Source control summary for the Duwamish Diagonal cleanup project addendum. Prepared for the Elliott Bay/Duwamish Restoration Panel. King County Department of Natural Resources and Parks, Seattle, WA. King County, Anchor, EcoChem. 2005a. Duwamish/Diagonal CSO/SD cleanup study report. Final. Prepared for Elliott Bay/Duwamish Restoration Program panel. King County Department of Natural Resources, Anchor Environmental, L.L.C., and EcoChem, Inc., Seattle, WA. - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 82 King County. 2006. Combined sewer overflow control program 2005-2006 annual report. Wastewater Treatment Division, King County Department of Natural Resources and Parks, Seattle, WA. King County. 2008. King County Parcel Viewer web page [online]. King County GIS Center, Seattle, WA. Available from: http://www.metrokc.gov/gis/index.htm. King County, SPU. 2005. King County and Seattle Public Utilities source control program for the Lower Duwamish Waterway: June 2005 progress report. King County Department of Natural Resources and Parks and Seattle Public Utilities, Seattle, WA. King County, Anchor, EcoChem. 2005b. Duwamish/Diagonal CSO/SD sediment remediation project closure report. Prepared for the Elliott Bay Duwamish Restoration Program Panel. King County Department of Natural Resources, Anchor Environmental LLC, and EcoChem, Inc., Seattle, WA. Metro Aerial. 1991. Seattle/Metro aerial survey: aerial photo of T-108 and vicinity. Survey by Metro Aerial. Publisher: Metro Aerial, Roseville, CA. Accessed at the Map Collection and Cartographic Information Services Unit, University of Washington Libraries, Seattle, WA. Nairn B. 2007. Personal communication (memorandum to Jeff Stern titled "CSO data provided to LDWG," distributed at October 24, 2007 meeting). Comprehensive Planning & Technical Resources Group, King County Department of Natural Resources and Parks, Seattle, WA. Undated. Pacific Aerial Surveys. 1961. Mylar enlargements: aerial photo of T-108 and vicinity. Publisher: Pacific Aerial Surveys. Accessed at the Map Collection and Cartographic Information Services Unit, University of Washington Libraries, Seattle, WA. Pacific Environmental Group. 1991. Letter dated January 3, 1991 to S. Bruce, Chevron USA, Inc., from E. Larsen and W. Crell, PEG, regarding soil landfarming at Chevron Site 4097. Pacific Environmental Group, Inc., Redmond, WA. Pacific Groundwater Group. 2006a. Draft South Oregon Street 2006 environmental data review and summary. Prepared for Port of Seattle. Pacific Groundwater Group, Seattle, WA. Pacific Groundwater Group. 2006b. Port of Seattle T-108 interim groundwater and soil investigation. Pacific Groundwater Group, Seattle, WA. Pacific Groundwater Group. 2006c. T-108 interim groundwater and shoreline soil investigation final work plan. Prepared for Port of Seattle. Pacific Groundwater Group, Seattle, WA. Pacific Groundwater Group. 2007a. Port of Seattle T-108 groundwater investigation final report. Pacific Groundwater Group, Seattle, WA. - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 83 Pacific Groundwater Group. 2007b. Soil and groundwater data report, Oregon Street right-of-way, Port of Seattle. Pacific Groundwater Group, Seattle, WA. Photographer unknown. 1953. S53 survey: Aerial photo of T-108 and vicinity. Accessed at the Map Collection and Cartographic Information Services Unit, University of Washington Libraries, Seattle, WA. Pinnacle Geosciences. 2005. Phase I environmental site assessment, Terminal 106 West, Building 1, 44 South Nevada Street, Seattle, Washington. Prepared for Port of Seattle. Pinnacle Geosciences, Inc., Bellevue, WA. Port of Seattle. 1985a. Comprehensive public access plan for the Duwamish Waterway. Port of Seattle, Seattle, WA. Port of Seattle. 1985b. State Environmental Policy Act (SEPA) environmental checklist determination of non-significance (DNS). POS SEPA 85-31. Port of Seattle, Seattle, WA. Port of Seattle. 1988. SEPA determination of nonsignificance (DNS) of proposed action, Terminal 108, bulk cement transshipment facility. Port of Seattle, Seattle, WA. Port of Seattle. 1989. Terminal 108 shore stabilization, water main and public access plot plan. Marine facilities drawing no. 108-8901-C1. Port of Seattle, Seattle, WA. Port of Seattle. 1992a. Environmental checklist, Port of Seattle Terminal 108 improvements. #9203345. Port of Seattle, Seattle, WA. Port of Seattle. 1992b. Letter from Barbara Hinkle, Environmental Management Specialist, to Barbara Ritchie, Department of Ecology, regarding Terminal 108 Improvements Environmental Checklist POS SEPA File Number (92-14). Port of Seattle, Seattle, WA. Port of Seattle. 1993. Marine facilities, Terminal 108 yard development, contract two: Existing conditions phasing and demo plan. Port of Seattle no. 108-93-1 C-3. Port of Seattle, Seattle, WA. Port of Seattle. 1999. Letters dated 8/10/99 and 9/24/99 to M. Jensen and T. Hudson, Puget Sound Clean Air Agency, regarding notice of intent and close-out of existing dust control equipment, Terminal 108, case no. 9901092. Port of Seattle, Seattle, WA. Schmoyer B. 2008. Personal communication (e-mail to Jeffrey Fellows, Windward Environmental, regarding source data through December 2007, with Excel attachment: source_chemistry_thru_12-07b.xls). Seattle Public Utilities, Seattle, WA. June 3, 2008. TAMS. 1992. Port of Seattle Chevron Property development: order of magnitude cost estimate and report. TAMS Consultants, Inc., Seattle, WA. - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 84 Taylor L. 1985. Letter to W. Justin, Department of Construction and Land Use, City of Seattle, regarding Determination of Non-significance. May 2, 1985. Director of Planning and Research, Port of Seattle, Seattle, WA. Tetra Tech. 1988. Elliott Bay action program: evaluation of potential contaminant sources. Prepared for Puget Sound Estuary Program, US Environmental Protection Agency, Region 10. Tetra Tech, Inc., Bellevue, WA. Thomas R. 2008. Personal communication (comments provided to Jeffrey Fellows, Windward Environmental, on Sections 5 and 6 of T108 Environmental Conditions Report, as attachment to e-mail). Northwest Regional Office, Washington State Department of Ecology, Bellevue, WA. December 11, 2008. Thorne Environmental. 1990. Quantitative chemistry results for soils stockpiled at the Chevron U.S.A. Inc. Chiyoda site, Seattle, Washington. Prepared for Chevron U.S.A. Inc. Thorne Environmental, Inc. WDNR. 1970. Seattle 1970 photomaps: aerial photo of T-108 and vicinity. . Publisher: Washington State Department of Natural Resources, Olympia, WA. Accessed at the Map Collection and Cartographic Information Services Unit, University of Washington Libraries, Seattle, WA. WDNR. 1981. SP-81: aerial photo of T-108 and vicinity. Photo by Washington State Department of Natural Resources. Publisher: Washington State Department of Natural Resources, Olympia, WA. Accessed at the Map Collection and Cartographic Information Services Unit, University of Washington Libraries, Seattle, WA. WDNR. 1995. NW-95 enlargements: aerial photo of T-108 and vicinity. Publisher: Washington State Department of Natural Resources, Olympia, WA. Accessed at the Map Collection and Cartographic Information Services Unit, University of Washington Libraries, Seattle, WA. - Port=of5eattle Terminal 108 Environmental Conditions Report FINAL January 23, 2009 Page 85 APPENDIX A Terminal-108 and Adjacent Property Photographic Log APPENDIX B Historical Aerial Photograph Review APPENDIX C Groundwater Monitoring Well and Boring Logs APPENDIX D Terminal-108 Analytical Information APPENDIX E Adjacent Property Analytical Information APPENDIX F Terminal-108 Reference Documentation Appendix A Terminal-108 and Adjacent Property Photographic Log Photo 1: ConGlobal Industries container terminal operations on the eastern parcel of T-108. Photo 2: View (looking north) of the maintenance area located on the eastern portion of the ConGlobal Industries container terminal. - Port~ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix A January 23, 2009 Page 1 Photo 3: A catch basin on the northern portion of the ConGlobal Industries container terminal located near the maintenance area (eastern parcel). - Port~ of Seattle Terminal 108 Environmental Conditions Report FINAL Photo 4: View (looking northwest from Diagonal Ave S) of the railway crossing the southern portion of the eastern parcel onto the eastern and central portions of the western parcel of T-108. Appendix A January 23, 2009 Page 2 Photo 5: View (looking south) of the northern portion of the western parcel of T-108. Container chassis are stored on portions of this parcel. The containers in the background are located on the eastern parcel. Photo 6: Vegetation, chassis parts storage, and a groundwater monitoring well (PGG-5) located on the northern portion of the western parcel of T-108. - Port~ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix A January 23, 2009 Page 3 Photo 7: View (looking west) of the chassis storage area located on the paved, central portion of the western parcel of T-108. Photo 8: View (looking north) from the interior of the western parcel of T-108. High-power transmission lines located along the S Oregon St ROW are visible in the background. - Port~ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix A January 23, 2009 Page 4 Photo 9: View (looking north from the Diagonal Ave S street-end) of the T-108 mitigation area and shoreline; protective buoy line visible at center of image. Photo 10: Close-up view (looking north) of the T-108 mitigation area. - Port~ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix A January 23, 2009 Page 5 Photo 11: View (looking south toward the mitigation area) of the southern portion of the T-108 shoreline. Photo 12: A portion of the wooden bulkhead located on the south-central portion of the T-108 shoreline. - Port~ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix A January 23, 2009 Page 6 Photo 13: Wooden bulkhead and the Port storm drain outfall (2225) located on the south-central portion of the T-108 shoreline. Photo 14: View (looking northwest) of the abandoned Diagonal Ave STP outfall and the pipeline dock (installed by Lafarge) located on the north-central portion of the T-108 shoreline. Note the native intertidal substrate. Port~ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix A January 23, 2009 Page 7 Photo 15: View (looking north) of the north-central and northern portions of the T-108 shoreline; the bank in this area is armored with rip-rap. Photo 16: View (looking south from the S Oregon St ROW end) of the northern portion of the T-108 shoreline. The Duwamish/Diagonal CSO/SD and EOF outfalls are nearby, and the location of the Duwamish Siphon is indicated by the sign. - Port~ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix A January 23, 2009 Page 8 Photo 17: View (looking east) of the S Oregon St ROW. T-108 is on the right-hand side of the photograph, and the WSLCB property is to the left. Photo 18: View (looking northeast from Diagonal Ave S) of the King County pumping station located adjacent and to the east of T-108. - Port~ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix A January 23, 2009 Page 9 Photo 19: View (looking northeast) of Diagonal Ave S. T-108 is located to the left (north) of the roadway, and the GSA’s Federal Center South is visible to the right (south). Photo 20: View (looking southeast from Diagonal Ave S) of the northern portion of the Federal Center South property. - Port~ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix A January 23, 2009 Page 10 Appendix B. Historical Aerial Photograph Review A historical aerial photo review was conducted to document changes in site use and layout at T-108 over time. Photos from 1936 (King County 2008), 1946 (Aerial Photo Publishers), 1953 (Photographer unknown), 1961 (Pacific Aerial Surveys), 1970 (WDNR), 1981 (WDNR), 1990 (Metro Aerial 1991), and 1995 (WDNR) were available. The parcel boundaries for both the Eastern and Western Parcels of T108 and the outline of the present-day shoreline are overlaid on the aerial photographs for reference. In addition to the aerial photos collected for this investigation, photos from 1976 and 1977 showing the central and western portions of the property were also available from an existing report by King County (King County et al. 2005). The 1936 aerial photograph shows the property undeveloped with a tidal channel located on the eastern and northern portions of the Eastern Parcel. The shoreline extends further into the LDW than the present-day shoreline. By 1946, the Diagonal Way STP had been developed. Two large, round clarifiers are visible in the photograph, with two smaller round digesters to the west, and three or four rectangular-shaped sludge-drying beds to the west of the digesters. A control house is located to the east of the clarifiers. The STP outfall is visible approximately midway along the property shoreline, and lumber is being stored offshore within the LDW. A report by King County indicated that the tidal channel on the north end of the property received untreated sewage from a small sewer system located to the northeast of the Diagonal Way STP (King County et al. 2005). What appears to be a small structure is visible along the eastern boundary of the Eastern Parcel in the aerial photograph from 1946. This may represent the small sewer system, however this could not be confirmed during the course of this investigation. The site layout observed in the 1953 photograph appears similar to the 1946 layout. In the 1961 photo, a large sludge pond is visible to the west of the clarifiers and digesters; additional sludge ponds may be present to the north of the treatment plant. A large parking lot has been installed on the southern portion of the property. In the aerial photograph from 1970, an additional structure has been added to the northeast corner of the Eastern Parcel. According to a historical map by the Kroll Map Co. contained in a historical report of site conditions conducted for Chevron by TAMS (1992), this may have been a pump house. Other changes from 1961 apparent on the 1970 photograph include filling of the tidal channel, clearing and grading on the northern and eastern portions of the site, and a reduction in the size of the open sludge pond located to the west of the clarifiers and digesters. In the 1981 aerial photograph, the STP has been removed and the shoreline along the northern portion of the property has been dredged. It appears that the paved parking area on the southern portion of the property and an area in the center of - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix B January 23, 2009 Page 1 the Eastern Parcel are being used to store shipping containers or similar large objects. The Lafarge facility is apparent on the Western Parcel of the property in the aerial photograph from 1990. The pipeline dock, cement silos, and truck turnaround area are all distinguishable. The Eastern Parcel appears to be primarily vacant except for a few equipment storage areas visible on the central and southern portions of the parcel. The shape of the mitigation area on the southern portion of the shoreline is also apparent, and lumber is no longer being stored offshore of the property. In the 1995 aerial photograph, the T-108 container terminal is visible on the Eastern Parcel of the property, while the Lafarge facility remains on the Western Parcel. The mitigation area appears to be more fully developed than in the 1990 photo as vegetation is now visible. The aerial photographs with coverage of the western portion of the property acquired from the Duwamish/Diagonal CSO/SD Cleanup Study Report (King County et al. 2005) provides information on site conditions at T-108 in the mid1970s. It was during this time period that the Diagonal Way STP was decommissioned, and also that two pits were excavated on the property to store and treat PCB-contaminated sediment dredged from the LDW. Based on these photographs, it is known that the sediment pits were present on the property in 1976 but had been filled by 1977. The Diagonal Way STP appears to have been decommissioned either in the latter half of 1976 of in 1977. The newly-dredged shoreline along the northern portion of the property is also clearly visible in the 1977 photograph. Overall, the historical aerial photographs reviewed during this investigation support the accounts of the property history reviewed in other reports and records. - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix B January 23, 2009 Page 2 Legend Approximate parcel boundaries Approximate present shoreline 1936 aerial photograph (King County 2008) Legend Approximate parcel boundaries Approximate present shoreline 1946 aerial photograph (Aerial Photo Publishers 1946) - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix B January 23, 2009 Page 3 Legend Approximate parcel boundaries Approximate present shoreline 1953 aerial photograph (Source not reported) Legend Approximate parcel boundaries Approximate present shoreline 1961 aerial photograph (Pacific Aerial Surveys 1961) Terminal 108 Environmental Conditions Report FINAL Appendix B January 23, 2009 Page 4 Legend Approximate parcel boundaries Approximate present shoreline 1970 aerial photograph (Washington Department of Natural Resources 1970) Legend Approximate parcel boundaries Approximate present shoreline 1981 aerial photograph (Washington Department of Natural Resources 1981) - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix B January 23, 2009 Page 5 Legend Approximate parcel boundaries Approximate present shoreline 1990 aerial photograph (Metro Aerial 1991) Legend Approximate parcel boundaries Approximate present shoreline 1995 aerial photograph (Washington Department of Natural Resources 1995) Terminal 108 Environmental Conditions Report FINAL Appendix B January 23, 2009 Page 6 approximate 1976 aerial photograph showing settling holding pits (KCDNR et al. 2005; photograph provided by US Army Corps of Engineers, Seattle District, dated July 28, 1976) approximate 1977 aerial photograph showing settling holding pits filled (KCDNR et al. 2005; photograph provided by US Army Corps of Engineers, Seattle District, dated October 4, 1977) - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix B January 23, 2009 Page 7 References Aerial Photo Publishers. 1946. Aerial survey of T4N, R3E and 4E: T-108 and vicinity. Publisher: Aerial Photo Publishers, Seattle, WA. Accessed at the Map Collection and Cartographic Information Services Unit, University of Washington Libraries, Seattle, WA. King County, Anchor, EcoChem. 2005. Duwamish/Diagonal CSO/SD cleanup study report. Final. Prepared for Elliott Bay/Duwamish Restoration Program panel. King County Department of Natural Resources, Anchor Environmental, L.L.C., and EcoChem, Inc., Seattle, WA. King County. 2008. iMap. King County spatial information interactive mapping [online]. King County, Seattle, WA. Updated July 7, 2008. Available from: (http://www.metrokc.gov/gis/mapportal/iMAP_main.htm. Metro Aerial. 1991. Seattle/Metro aerial survey: aerial photo of T-108 and vicinity. Survey by Metro Aerial. Publisher: Metro Aerial, Roseville, CA. Accessed at the Map Collection and Cartographic Information Services Unit, University of Washington Libraries, Seattle, WA. Pacific Aerial Surveys. 1961. Mylar enlargements: aerial photo of T-108 and vicinity. Publisher: Pacific Aerial Surveys. Accessed at the Map Collection and Cartographic Information Services Unit, University of Washington Libraries, Seattle, WA. Photographer unknown. 1953. S53 survey: Aerial photo of T-108 and vicinity. Accessed at the Map Collection and Cartographic Information Services Unit, University of Washington Libraries, Seattle, WA. TAMS. 1992. Port of Seattle Chevron Property development: order of magnitude cost estimate and report. TAMS Consultants, Inc., Seattle, WA. WDNR. 1970. Seattle 1970 photomaps: aerial photo of T-108 and vicinity. . Publisher: Washington State Department of Natural Resources, Olympia, WA. Accessed at the Map Collection and Cartographic Information Services Unit, University of Washington Libraries, Seattle, WA. WDNR. 1981. SP-81: aerial photo of T-108 and vicinity. Photo by Washington State Department of Natural Resources. Publisher: Washington State Department of Natural Resources, Olympia, WA. Accessed at the Map Collection and Cartographic Information Services Unit, University of Washington Libraries, Seattle, WA. WDNR. 1995. NW-95 enlargements: aerial photo of T-108 and vicinity. Publisher: Washington State Department of Natural Resources, Olympia, WA. Accessed at the Map Collection and Cartographic Information Services Unit, University of Washington Libraries, Seattle, WA. - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix B January 23, 2009 Page 8 Appendix C Groundwater Monitoring Well and Boring Logs BORING AND WELL LOG INFORMATION BORING CORE ID COMPLETED AS A WELL? OBTAINED LOG? ENDNOTE CITATION C-1 Y Y AGI (1992) C-2 Y Y AGI (1992) C-3 Y Y AGI (1992) C-4 Y Y AGI (1992) C-5 Y Y AGI (1992) C-6 Y Y AGI (1992) MW-7 Y Y AGI (1992) MW-8 Y Y AGI (1992) MW-9 Y Y AGI (1992) MW-10 Y Y AGI (1992) MW-11 Y Y AGI (1992) MW-12 Y Y AGI (1992) MW-13 Y Y AGI (1992) MW-14 Y Y AGI (1992) PGG-1 Y Y Pacific Groundwater Group (2007) PGG-2 Y Y Pacific Groundwater Group (2007) PGG-3 Y Y Pacific Groundwater Group (2007) PGG-4 Y Y Pacific Groundwater Group (2007) PGG-5 Y Y Pacific Groundwater Group (2007) PGG-6 Y Y Pacific Groundwater Group (2007) PGG-7 Y Y Pacific Groundwater Group (2007) A N Y AGI (AGI 1992) D&M - diff locations from PEG A-F B N Y AGI (AGI 1992) D&M - diff locations from PEG A-F C N Y AGI (AGI 1992) D&M - diff locations from PEG A-F D N Y AGI (AGI 1992) D&M - diff locations from PEG A-F E N Y AGI (AGI 1992) D&M - diff locations from PEG A-F F N Y AGI (AGI 1992) D&M - diff locations from PEG A-F B88-1 N Y Dames & Moore (1989) B88-2 N Y Dames & Moore (1989) B88-3 N Y Dames & Moore (1989) B81-1 N Y Dames & Moore (1981) Boring log label is 1 B81-2 N Y Dames & Moore (1981) Boring log label is 2 B81-3 N Y Dames & Moore (1981) Boring log label is 3 B81-4 N Y Dames & Moore (1981) Boring log label is 4 B81-5 N Y Dames & Moore (1981) Boring log label is 5 Terminal 108 Environmental Conditions Report NOTES FINAL Appendix C January 23, 2009 Page 1 BORING CORE ID COMPLETED AS A WELL? OBTAINED LOG? ENDNOTE CITATION B81-6 N Y Dames & Moore (1981) Boring log label is 6 B81-7 N Y Dames & Moore (1981) Boring log label is 7 B81-8 N Y Dames & Moore (1981) Boring log label is 8 B81-9 N Y Dames & Moore (1981) Boring log label is 9 B81-10 N Y Dames & Moore (1981) Boring log label is 10 B81-11 N Y Dames & Moore (1981) Boring log label is 11 B81-12 N Y Dames & Moore (1981) Boring log label is 12 B81-13 N Y Dames & Moore (1981) A N N Pacific Environmental Group (1991)* PEG - diff locations from D&M A-F B N N Pacific Environmental Group (1991)* PEG - diff locations from D&M A-F C N N Pacific Environmental Group (1991)* PEG - diff locations from D&M A-F D N N Pacific Environmental Group (1991)* PEG - diff locations from D&M A-F E N N Pacific Environmental Group (1991)* PEG - diff locations from D&M A-F F N N Pacific Environmental Group (1991)* PEG - diff locations from D&M A-F NAT-1 N N Pacific Groundwater Group (2006)* NAT-2 N N Pacific Groundwater Group (2006)* NAT-3 N N Pacific Groundwater Group (2006)* NAT-4 N N Pacific Groundwater Group (2006)* NAT-5 N N Pacific Groundwater Group (2006)* NAT-6 N N Pacific Groundwater Group (2006)* EP-1 N N Pacific Groundwater Group (2006)* EP-2 N N Pacific Groundwater Group (2006)* EP-3 N N Pacific Groundwater Group (2006)* EP-4 N N Pacific Groundwater Group (2006)* EP-5 N N Pacific Groundwater Group (2006)* EP-6 N N Pacific Groundwater Group (2006)* EP-7 N N Pacific Groundwater Group (2006)* EP-8 N N Pacific Groundwater Group (2006)* EP-9 N N Pacific Groundwater Group (2006)* EP-10 N N Pacific Groundwater Group (2006)* EP-11 N N Pacific Groundwater Group (2006)* DUD_30C N N Anchor (2007)* DUD_31C N N Anchor (2007)* NOTES Boring log label is 13 Should be in PEG 1991 Environmental Investigation but boring logs are missing from Appendix * – Could not find boring log, but found analytical data associated with the location Terminal 108 Environmental Conditions Report FINAL Appendix C January 23, 2009 Page 2 REFERENCES AGI. 1992. Site assessment summary, site 64534097, 4525 Diagonal Avenue South, Seattle, Washington. Prepared for Chevron USA Products Company. Applied Geotechnology, Inc., Bellevue, WA. Anchor. 2007. Duwamish/Diagonal sediment remediation project 2005 monitoring report: Elliott Bay/Duwamish restoration program panel. Panel publication 40. Prepared for King County Department of Natural Resources and Parks Elliot Bay/Duwamish restoration program. Anchor Environmental, L.L.C., Seattle, WA. Dames & Moore. 1981. Report of site contamination, Chiyoda property. Prepared for Port of Seattle. Dames & Moore, Seattle, WA. Dames & Moore. 1989. Report of geotechnical services, proposed cement terminal, Seattle, Washington. Prepared for LaFarge Canada, Inc. Dames & Moore, Seattle, WA. Pacific Environmental Group. 1991. Letter dated January 3, 1991 to S. Bruce, Chevron USA, Inc., from E. Larsen and W. Crell, PEG, regarding soil landfarming at Chevron Site 4097. Pacific Environmental Group, Inc., Redmond, WA. Pacific Groundwater Group. 2006. T-108 interim groundwater and shoreline soil investigation final work plan. Prepared for Port of Seattle. Pacific Groundwater Group, Seattle, WA. Pacific Groundwater Group. 2007. Port of Seattle T-108 groundwater investigation final report. Pacific Groundwater Group, Seattle, WA. Terminal 108 Environmental Conditions Report FINAL Appendix C January 23, 2009 Page 3 LOCATION MAP Access Road (/) ~ "iii c o 0> '" is Office Trailer ,/ DO .C-1 PACifiC ENVIRONMENTAL GROUP, INC. PROJECT NO. 520-02.02 LOGGED BY: EL DRILLING METHOD: HSA SAMPLING METHOD: Splft Spoon CASING TYPE: Sch 40 PVC SLOT SIZE: 0.010" GRAVEL PACK: 10 X 20 SAND z WELL COMPLETION S~E z tJ:~iil F:I:! iS~ I:iiUl'>: ~z ClU]D.. zooS a.cc_ ~8 a::o::e::. LlJLlJ", w ... C:: z (!) i::>=' o.W WW oS W -' 0. ::;: « en () :E 0. « c:: CJ ~ 9 LITHOLOGY / REMARKS -' 6en 2 0 CLIENT: Chevron USA DATE DRILLED: 8-16-90 LOCATION: 4525 Diagonal Ave. HOLE DIAMETER: 8" HOLE DEPTH: 19' WELL DEPTH: 17' WELL DIAMETER: 2" W 0. CL Dp WELL! G-1 BORING NO. PAGE 1 OF 1 CLAY; dark grayish brown; silty; 10-20% fine gravel; stiff; no hydrocarbon-like odor. 4 6-l--¥ 4.6 10 @7.5': gray; wood fragments; soft; hydrocarbon-like 8 odor. 10-l--¥ 12+-1: o 5 OL ORGANIC CLAY; dark gray; silty; 20% peat; soft; no hydrocarbon-like odor. 14 16-!---f:: Wt o 1 18 20 22 @17.5': sitt interbeds; very soft; no hydrocarbon-like odor. BOTTOM OF BORING 19' LIP OF BOX STICKUP: 2.4' 24 26 28 30 32 34 36 38 40 42 44 Appendix C 4 PACiFIC ENViRONMENTAL GROUP, iNC. -1-----------------------1 LOCATION MAP -------Power Lines---FENCE-----·-T---I 4lIJ C-2:'E t ! w ~ 0 zo .:='" ~::2 ! PROJECT NO. 520-02.02 LOGGED BY: EL DRILLING METHOD: HSA SAMPLING METHOD: Split Spoon CASING TYPE: Sch 40 PVC SLOT SIZE: 0.010" GRAVEL PACK: 10 X 20 SAND WELL/ G-2 BORING NO. 1 PAGE 1 OF CLIENT: Chevron USA DATE DRILLED: 8-16-90 LOCATION: 4525 Diagonal Ave. HOLE DIAMETER: 8" HOLE DEPTH: 19' WELL DEPTH: 17' WELL DIAMETER: 2" Z Ql'5f .... z C!:j5iil .... CIl5: ill-a ZCIl..J ~~CIl - ~ Dp L?L -- I-- = -.. Mst -dJ=w-Y _w= z- 0.7 10 -Cl~ Z 1:':::::1--_cn~ « EO' - - - - .. .. - ~ o 6 o 4 o 2 - _ -WI . - --.. --. ---- a. « a: a. 1: ...J LITHOLOGY / REMARKS 0 (9 Ul _,-- :: SM . . SILTY SAND; black; 20-30% fines; fine grained; medium dense; hydrocarbon-like odor. 4.::1= :: -- .. : 8~-= ..~ @7.5': loose; hydrocarbon-like odor. ~- WI - « Ul W 0 ;;: 10-l--IJ· . ~ dJ-SZ F= en ::; 6 _ '-' ~ 0_ =::;:1-- - WW o!!::- ...J a. 2 -::2=t::- - iEr=a. w W 12~ ML 14--.1-16-+--1...1 18-1I=~ CL 20-1-.1-22+-1 -I-24+-1 SILT; dark gray; 20-30% fine sand; firm; hydrocarbon-like odor. CLAY; dark gray; silty; soft; no hydrocarbon-like odor. BOTTOM OF BORING 19' LIP OF BOX STICKUP: 2.54' -- 26+-1 -I-28 -I-30+-1 -- 32-+---1 -,..- 34-+---1 -'-36 --40-+---1 -42 -44-l----l 38 Appendix C 5 LOCATION MAP -------Power l.ines PACIFIC ENVIRONMENTAL GROUP, INC.-I WELL! C'r3 BORING NO. __ ~ PAGE 1 OF 1 PROJECT NO. 520-02.02 LOGGED BY: EL DRILLING METHOD: HSA SAMPLING METHOD: Split Spoon CASING TYPE: Sch 40 PVC SLOT SIZE: 0.010" GRAVEL PACK: 10 X 20 SAND CLIENT: Chevron USA DATE DRILLED: 8-16-90 LOCATION: 4525 Diagonal Ave. HOL.E DIAMETER: 8" HOLE DEPTH: 19' WELL DEPTH: 17' WELL DIAMETER: 2" LITHOLOGY I REMARKS __ .. - - ~- ~ I- 2 Dp 0 10 10.5 2 I- I.U 1==:= I.U ~-_ 01= - 1--..,.- Mst CJ ~ - ~~ - - - r- -- ~ -- - .- - - - ---- - - - --1---= ....::.. 8- @7.5': wood fragments; loose; hydrocarbon-like odor. -I-- : : 0 1 0 1 - _en-IV - = - WI - .. 10-1-- .. i== c:o If- SILTY SAND; dark gray; 30-40% fines; fine grained; trace gravel; medium dense; hydrocarbon-like odor. +- :: I.U _ wl:= I-::;;E o - 4- L SM 6-1-- .. 1-1-1:= I - Z F 1::;Dp Z -:-a= :: 12 ill- : @12.5': abundant wood fragments; loose; 14 _L~ CL" hydrocarbon-like odor. _'--~ CLAY; gray; siny; peaty; very soft; no hydrocarbon-like 16 ~ odor. 18~t=f% 20-- -22-- @17.5': no hydrocarbon-like odor. BonOM OF BORING 19' LIP OF BOX STICKUP: 1.63' -- 24-l---l -I-26-1-- -I-28-1-- -I-- 30-l---l -f-32--+---1 -I34 -I36-1- -I38-1f-40-- -- 42-- -- 44-- Appendix C 6 LOCATION MA~P r ~ ~ Crane ~ Paming --- -- _.---f';,ce -- WELL PACIFIC ENVIRONMENTAL GROUP, INC. PROJECT NO. 520-02.02 LOGGED BY: EL DRILLING METHOD: HSA SAMPLING METHOD: spm Spoon CASING TYPE: Sch 40 PVC SLOT SIZE: 0.010" GRAVEL PACK: 10 X 20 SAND BORING NO. PAGE 1 OF 1 CLIENT: Chevron USA DATE DRILLED: 8-16-90 LOCATION: 4525 Diagonal Ave. HOLE DIAMETER: 8" HOLE DEPTH: 15' WELL DEPTH: 15' WELL DIAMETER: 2" LITHOLOGY / REMARKS iEi=' a. w COMPLETION WELL/G-4 wW oi±:. - - ~ ~ ~ Dp ,... -ZE f- f-- _ LU o 3 I" '\ OF: Z_ WI ~ == _ .(Jj~ - WI ~ = Cl _. Z - i-- o 6 - -- - --- - 8-::1: :: o 2 -=..... ••••• - I--.f.i•• 12 Pt 14••••• 16-- -- --22-20-- --26--24-- 28-- -- - - - BOTTOM OF BORING 15' LIP OF BOX STICKUP: 0.83' 18-- 34-- --- PEAT; bn;>wn; very soil; no hydrocarbon-like odor. •• 30-- --- @7.5':fineto coarse grained; no hydrocarbon-like odor. ~.! --- .. 1 0 - - .. - - .. SILTY SAND; grayish brown; 15% lines; line grained; loose; no hydrocarbon-like odor. 6-'-- .. E:= u.:- ;:=00 - 4- L -::iiL: :: SM '-- .. ~- ~ ~_ .. 2 LU 1= -:::;EZ LU _ -- 32-- - --38-36-- -42-40-- -- 44-- Appendix C 7 i LOCATION MAP ! .-_. --' - . Power lInes~----. FENCE -----. WELL! G-S PACiFIC ENVIRONMENTAL GROUP, INC. BORING NO. PAGE 1 OF 1 w o zW PROJECT NO. 520-02.02 LOGGED BY: EL DRILLING METHOD: HSA SAMPLING METHOD: spm Spoon CASING TYPE: Sch 40 PVC SLOT SIZE: 0.010" GRAVEL PACK: 10 X 20 SAND lJ.. i C·5 Ie I [ ~ ,, WELL COMPLETION -' ~ _. LITHOLOGY / REMARKS - - f-- ~DP ::::: - - ~ ~ ~- w ~ z-.Qp - ifj~o-'y' 11.4 9 - I-«~ r I 8 .... -I- :: 16 - - -. - - - -- -- - --. -- -- .... 14~l: :: - - I - 2.1 - r-CJ)f;::: @7.S': very loose; hydrocarbon-like odor. 12-+-+· . -·Wl f-~~ .. ., ~SZ- ~ : : 8-=l ~ ~ 10 g:: }jj - SILTY SAND; black; 20-30% fines; fine to medium grained; loose; hydrocarbon-like odor. .. -I-- 2 SM 4-~ .. • f-- 28 :: 2-~ :: 6 _o~ ~_ I- CLIENT: Chevron USA DATE DRILLED: 8-16-90 LOCATION: 4525 Diagonal Ave. HOLE DIAMETER: 8" HOLE DEPTH: 19' WELL DEPTH: 17' WELL DIAMETER: 2" Wl o 2 "// 18~l~ CL 20+-l .122-1-I24-+---1 .1-26-+---1 28 CLAY; gray; trace sitt; peaty; very soft; hydrogen sulfide odor; no hydrocarbon-like odor. BonOM OF BORING 19' LIP OF BOX STICKUP: 2.75' -- -I30-+-1 -I-32-+---1 .1-34-+---1 .1-36-1--I-38-+---1 -I-40-+---1 --44-+-l 42-+-l Appendix C 8 WELL/ C-6 LOCATION MAP Gas Gas Pump Storage Pump Storage C-B ~ l'i> t 1>-,,0. S Ol7J.Q,° wf- a: z WELL COMPLETION i::1:! C) z ~~Ul 15~ tu(/)>: zCi59 a!6. « a::a:!:::. ~8 aU5a.. ~ ~ Dp W- y 0 1 - Wt 0 2 -f- r=~ 0 _ IWt - () 1:= - ~ ro~ to _ a ~ -z ~ !:::= LU - ~ ~ - = - - - - - - -- · · · -- - - - - -- W "- "- ~ CD 5(/) -- ··· . SM Ii=" "::; b: UJ LlJLlJ (/) 2 --::2ro f::=: !::";-- sz. - 0 5: 0 - LlJ - ~ - PROJECT NO. 520-02.02 LOGGED BY: EL DRILLING METHOD: HSA SAMPLING METHOD: Spitt Spoon CASING TYPE: Sch 40 PVC SLOT SIZE: 0.010" GRAVEL PACK: 10 X 20 SAND -' 4 - PAGE 1 OF 1 z OW_ I='-'I:i: g:~CD - PACIFIC ENViRONMENTAL GROUP, INC. BORING NO. . . ·. ·. ·. 4-I-- ·· .. 6- I-- · . ·. · ·. 8·. · . ·. ·. 10 l · ~OL - 1416 18 LITHOLOGY / REMARKS ....l l 12- CLIENT: Chevron USA DATE DRILLED: 8-16-90 LOCATION: 4525 Diagonal Ave. HOLE DIAMETER: 8" HOLE DEPTH: 15' WELL DEPTH: 15' WELL DIAMETER: 2" SILTY SAND; black; 20-30% fines; fine to medium grained; loose; no hydrocarbon-like odor. @7.S': very loose; no hydrocarbon-like odor. ORGANIC CLAY; dark gray; trace sin; abundant peat; very soft; hydrogen suffide odor; no hydrocarbon-like odor. BOTTOM OF BORING 15' -I-- -- 20- - --24 22 26 ·I-· I-- 28 · I-- 30- I-- -I--I-34 -- 32- I-- 36 - 38- - 40- ---: ......; 42- ......; ·- 44- ......; Appendix C 9 Equipment _--....:M=o~bi~le:..:B::.-6=·I Well Construction Summary 0; 0. (I) ~ (5 co If 0.4 .c II " Ci. 0.. E C3 «S Land Surface Elevation _ ._-..:;8::.::.8:..:f.:;::ee::::t_*__ Date 10(8(91 (f) 0...,...,..,.,""'".,..-------------------BROWN SAND (SPllo~, m.", fm' ,""oro, 10 5 0.4 Becomes black, wet at 9 feet. 8 10 :;\".:\. 0.0 15.0' ' - - - - ' 15.5' GRAY CLAY (Ol) soft, wet; with a trace of organic debris. 4 15 Groundwater not encountered during drilling. 20 *Temporary Benchmark = 8.35 feet 25 30 35 40 ~ log of Monitoring Well 7 Applied Geotechnology Inc. Geotechnical Engineering Geology & Hydrogeology JOB NUMBER DRAWN 15,582.022 SES Chevron/Site 64534097 Seattle, Washington APPROVED 6'eez. DATE 10 Aug 92 REVISED PLATE 83 DATE Appendix C 10 30 35 40 ~ Log of Monitoring Well 8 Applied Geotechnology Inc. Chevron/Site 64534097 Seattle. Washington Geotechnical Engineering Geology & Hydrogeology JOB NUMBER 15,582.022 DRAWN APPROVED DATE SES ae~ 10 Aug 92 REVISED PLATE 84 DATE Appendix C 11 Well Construction Summary Equipment Mobile B-61 Land Surface Elevation -7.3 feet * Date 10(8(91 o "'-l'"~"":"'~:}"'~'-:B-=R-=OC:-WC:-N--S-IL-=TY:-:-:S-A-:-N""O-(-S-M-)-Io-o-s-e,-m-o-i-st-;f-in-e-t-o-- _ B;i~ medium grained. ~:+ ~~ 3.0' 0.4 5.0' 5 .- ~ Co;.;.....:,..:..· ¥+.;<. 5- d!f ;:;~ t~ .;7•.,••.~ ~~ BROWN SANO (SP) loose, moist; medium grained. 9.58' 10/11/91 0.4 9 ,"- ~f~ :.:.~;~:::: ..~:..:.;.~..;. 0.4 15,0' 15,5' 4 15 - 2.2 2 0.4 2 0.0 2 20- :..:--=-- :::-::: :..-_-:.. -=--=-:.::-=--=--=-:.::-=-1--- GRAY BROWN SILT (ML) soft, moist; with a trace of root and wood debris. Becomes wet at 19 feet. Groundwater not encountered during drilling. - 25- 30- . 35- 40- ~ log of Monitoring Well 9 Applied Geotechnology Inc. Chevron/Site 64534097 Seattle, Washington Geotechnical Engineering Geology & Hydrogeology JOB NUMBER DRAWN APPROVED 15,582,022 SES C(!,tL DATE 10 Aug 92 REVISED PLATE 85 DATE Appendix C 12 Well Construction Summary E 0- .s, ::; 6 ~ 00 ~00 ooLZ Equipment Mobile B-61 Land Surface Elevation -10.1 feet· W .c 1i a. E • • Cl (/) Date 10/9/91 0 BROWN SILTV SAND (SM) loose, moist; fine to medium grained. 1.0' 1.5' 3.0' 5.0' 10.94' 10/11/91 20.0' 0.0 8 1.4 4 0.9 5 0.4 5 Becomes wet at 12 feet. 0.4 2 DARK BROWN BLACK SAND (SP) very loose, wet; medium grained, with some silt. 0.4 3 0.4 2 0.0 5 5 DARK GRAY SANDY SILT (ML) medium stiff, moist. Becomes black, with a trace of organics at 9.5 feet. 10 15 20 20.5' 22.5' Ii GRAY SANDY SILT (ML) medium stiff. wet; very fine sand. Groundwater not encountered during drilling. 25 30- 35 40 ~ log of Monitoring Well 10 Applied Geotechnology Inc. Chevron/Site 64534097 Seattle, Washington Geotechnical Engineering Geology & Hydrogeology JOB NUMBER DRAWN 15,582.022 SES APPROVED Cee.- DATE 10 Aug 92 REVISED PLATE 86 DATE Appendix C 13 Well Construction Summary Ea. -& ::;; > 0 " ~ ro a. 00 ~0 0 ffiG: Equipment Mobile 6-61 Land Surface Eievation -7.5 feet * ro 0. a. E oS ro 0 00 (f) Date 10(8(91 0 BROWN SilTY SAND (SM) loose, moist; fine to medium grained. 1.0' 1.5' 3.0' 5.0' 0.4 7 0.4 10 5 9.0' lD/8/91 Becomes black, saturated at 9.5 feet. 10 0.0 15.0' ' - - - - - ' 15.5' 2 15 GRAY CLAY (el) very soft, saturated; with a trace of organics. Groundwater encountered at 9 feet during drilling. 20 25 30 35 40 ~ log of Monitoring We1l1"! Applied Geolechnology Inc. Geotechnical Engineering Geology & Hydrogeology Chevron/Site 64534097 Seattle, Washington JOB NUMBER DRAWN APPROVED DATE 15,582.022 SES !fCc..., 10 Aug 92 REVISED PLATE 87 DATE Appendix C 14 Well Construction Summary E 0.£> ::l' > 0 :;; 000 300 m~ Equipment •. Mobile B-fi1 L.and SUrface Elevation -9.8 feet * W .c 0. E ClC> Damp, brown, gravelly SAND (SP) with trace silt and organics 1 Flush-mount, high-traffic, heavy-duty monument High strength concrete 8,9,15 2 2-inch PVC riser Hydrated bentonite 3 Damp, brown, gravelly SAND (SP); poor recovery; diesel odor in sampler 4 5,6,14 8-inch borehole 5 o z « (j) Wet, brown, silty SAND (SM); light hydrocarbon odor in sampler; trace gravel, shell fragements and broken glass 6 PGG-1A 4,5,9 7 2-inch 10-slot PVC screen (3.5 to 10 feet) Sand pack Lapis Lustre Monterey sand blend #39 8 Wet, gray, fine-medium SAND (SP) Water level 8.65 feet on 6/9/2006 9 4,2,1 10 I....J Wet, brown, sandy SILT with trace organics (ML-OL) (j) Project Name: T-108 Drilling Method: Hollow Stem Auger Driller: Andy Flanagan Firm: Cascade Drilling Consulting Firm: PGG Logged by: Glen Wallace Location: Terminal 108, Seattle, Washington Well Name: PGG-1 Ecology ID: APQ005 MP Elevation:15.04 Datum: MLLW Installed: 6/6/2006 Figure A-1 GEOLOGIC LOG AND AS-BUILT FOR WELL PGG-1 Port of Seattle T-108 Seattle, Washington JK0410, 6/6/2006 Appendix C 18 Blow Counts Soil Sample Unit Geology Depth (ft) 0 Log Damp, brown, medium SAND (SP); trace silt and gravel; poorly graded/sorted 1 Well Construction Flush-mount monument Concrete Hydrated bentonite 2 6,6,5 2-inch PVC riser 3 4 Damp, light gray, silty SAND (SM/SP); silt occurs as thin, irregular layers with oxidation at contact with sand o z « (j) 3,3,3 5 2-inch 10-slot PVC screen (3.5 to 10.5 feet) 6 Moist, dark gray, fine silty SAND (SP) with isolated fragments of tan silt; trace gravel 7 3,3,3 Sand pack Lapis Lustre Monterey Sand blend #39 8 Moist, dark gray sandy SILT (SM) with trace organics, trace shell fragments; light diesel PGG-2A odor in sampler 9 3,3,3 10 11 8-inch borehole I....J (j) 12 Water level 7.22 ft on 6/8/2006 Wet, dark gray, sandy SILT (OL/CL) with trace organics and mixed peaty layers; light PGG-2B diesel odor in sampler 6,5,5 Bentonite 13 14 Project Name: T-108 Drilling Method: Hollow Stem Auger Driller: Andy Flanagan Firm: Cascade Drilling Consulting Firm: PGG Logged by: Glen Wallace Location: Terminal 108, Seattle, Washington Well Name: PGG-2 Ecology ID: APQ002 MP Elevation:18.82 Datum: MLLW Installed: 6/5/2006 Figure A-2 GEOLOGIC LOG AND AS-BUILT FOR WELL PGG-2 Port of Seattle T-108 Seattle, Washington JK0410, 6/6/2006 Appendix C 19 Blow Counts Soil Sample Unit Geology Depth (ft) 0 Log Moist, brown-gray, fine SAND (SP); poorly sorted, poorly graded 1 2 Well Construction Flush-mount monument Concrete 2-inch PVC riser o z « (j) 5,6,5 Hydrated bentonite 3 4 I....J (j) 5 Wet, tan, SILT (CL) 4,4,4 Wet, brown, fine SAND (SP); faint paleosol at silt contact 6 2-inch 10-slot PVC screen (3.5 to 11 feet) Moist, gray, fine-medium SAND (SP) Water level 6.92 feet 6/8/2006 7 4,5,6 8 Sand pack Lapis Lustre Monterey Sand blend #39 o z « (j) Wet, gray, fine-medium SAND (SP); poorly sorted, poorly graded 9 1,2,3 10 8-inch borehole 11 Wet, brown SILT (OL); trace sand at top of sample; trace organics increase downwards 12 I....J (j) 1,1,2 Bentonite 13 Project Name: T-108 Drilling Method: Hollow Stem Auger Driller: Andy Flanagan Firm: Cascade Drilling Consulting Firm: PGG Logged by: Glen Wallace Location: Terminal 108, Seattle, Washington Well Name: PGG-3 Ecology ID: APQ004 MP Elevation: 13.26 Datum: MLLW Installed: 6/5/2006 Figure A-3 GEOLOGIC LOG AND AS-BUILT FOR WELL PGG-3 Port of Seattle T-108 Seattle, Washington JK0410, 6/6/2006 Appendix C 20 Blow Counts Soil Sample Unit Geology Depth (ft) 0 (jj « ASPHALT ..J GRAVEL > 0::: 1 Log Well Construction Flush-mount monument Concrete C> Damp, brown to dark brown, gravelly SAND (SP); trace organic material; no odor 2-inch PVC riser 10,18,11 2 Hydrated bentonite 3 Damp, grayish brown, med-fine SAND (SP); trace silt; homogeneous 4 4,4,4 5 Sand pack Lapis Lustre Monterey Sand blend #39 o z « (j) 6 Damp, gray, fine SAND (SP); trace silt 4,5,4 7 10-slot PVC screen (3.5 to 10 feet) 8 8-inch borehole Wet, gray,fine SAND (SP) 9 nr 10 I....J (j) Water level 9.47 feet on 6/8/2006 Wet, dark gray, SILT (MM); trace organics Project Name: T-108 Drilling Method: Hollow Stem Auger Driller: Andy Flanagan Firm: Cascade Drilling Consulting Firm: PGG Logged by: Glen Wallace Location: Terminal 108, Seattle, Washington Well Name: PGG-4 Ecology ID: APQ006 MP Elevation: 15.21 Datum: MLLW Installed: 6/6/2006 Figure A-4 GEOLOGIC LOG AND AS-BUILT FOR WELL PGG-4 CORRECTION Port of Seattle T-108, Seattle, WA JK0410, 6/6/2006 Appendix C 21 Blow Counts Soil Sample Unit Geology Depth (ft) Log Well Construction -3 -2 Yellow steel Stickup monument with 3 bollards. -1 0 Damp, brown silty SAND (SP); trace organics 1 Concrete 2 9,10,12 PGG-5A 3 4 o 2-inch PVC riser z « (j) 5 Hydrated bentonite 2,2,2 PGG-5B 6 Damp, gray, silty SAND; trace organics 7 Moist, gray med-fine SAND (SP) 8 1,1,1 PGG-5C 9 10 Moist, tan SILT 8-inch borehole I....J (j) nr PGG-5D 11 Moist interbedded tan SILT and and moist to wet gray fine SAND; trace organics 12 13 o z « (j) Moist, gray,fine-medium SAND nr PGG-5E 14 2-inch 10-Slot PVC Screen (8 to 18 feet) Moist, gray sandy SILT; trace gravel 15 I- 16 17 ....J (j) nr PGG-5F o z 18 19 Sand pack Lapis Lustre Monterey Sand blend #39 Wet, gray, fine-medium SAND (SP) « (j) I....J (j) 5,3,2 PGG-5G Wet, tan SILT with organics Water level 18.82 feet on 6/8/2006 Bentonite 20 Project Name: T-108 Drilling Method: Hollow Stem Auger Driller: Andy Flanagan Firm: Cascade Drilling Consulting Firm: PGG Logged by: Glen Wallace Location: Terminal 108, Seattle, Washington Well Name: PGG-5 Ecology ID: APQ007 MP Elevation: 22.81 Datum: MLLW Installed: 6/6/2006 nr = not recorded Figure A-5 GEOLOGIC LOG AND AS-BUILT FOR WELL PGG-5 Port of Seattle T-108 Seattle, Washington JK0410, 6/6/2006 Appendix C 22 Blow Counts Soil Sample Unit Geology Depth (ft) 0 Log Damp, brown, gravelly, medium-fine SAND (SP); poorly sorted, poorly graded 1 Well Construction Flush-mount monument Concrete 2-inch PVC riser 2 3 Hydrated bentonite o 16,30, 50.5 PGG-6A z « (j) Damp, gray, fine SAND (SP) 4 8,9,10 PGG-6B 5 8-inch borehole 6 Moist, brown, SILT (OL); trace organics I- 7 ....J 2-inch 10-Slot PVC Screen (3.5 to 12.5 feet) (j) 7,6,4 PGG-6C Moist, gray SAND (SP) 8 Moist to wet, gray fine-medium SAND (SP) with trace silt; poorly graded, poorly sorted 9 Sand pack Lapis Lustre Monterey Sand blend #39 Water level 9.63 feet on 6/8/2006 10 o z « (j) 3,3,4 PGG-6D 11 Moist, gray,fine-medium SAND 12 1,2,3 PGG-6E 13 (j) Wet, tan SILT with organics in sampler shoe Project Name: T-108 Drilling Method: Hollow Stem Auger Driller: Andy Flanagan Firm: Cascade Drilling Consulting Firm: PGG Logged by: Glen Wallace Location: Terminal 108, Seattle, Washington Well Name: PGG-6 Ecology ID: APQ003 MP Elevation: 15.03 Datum: MLLW Installed: 6/5/2006 Figure A-6 GEOLOGIC LOG AND AS-BUILT FOR WELL PGG-6 Port of Seattle T-108 Seattle, Washington JK0410, 6/6/2006 Appendix C 23 Blow Counts Soil Sample Unit Geology Depth (ft) 0 Log ASPHALT Dry, angular GRAVEL. 1 Well Construction Flush-mount monument Concrete Damp, brown, fine-medium SAND (SP); trace silt 2-inch PVC riser 2 13,8,14 PGG-7A Hydrated bentonite 3 4 Damp, gray, medium SAND (SP) 5 o z 4,4,4 PGG-7B « (j) Water level estimated at 6 feet ATD 6 Water level 6.56 feet on 6/9/2006 Wet, dark gray, medium SAND (SP) 7 3,3,4 PGG-7C 2-inch 10-slot PVC screen (4 to 10.5 feet) 8 9 Sand pack Lapis Lustre Monterey Sand blend #39 3,3,4 PGG-7D 10 Wet, light brown, SILT (ML/OL); trace organics 11 I- 8-inch borehole ....J (j) 12 nr PGG-7E 13 o z Wet, dark gray SAND (SP, SM); trace silt Hydrated bentonite « (j) 14 Project Name: T-108 Drilling Method: Hollow Stem Auger Driller: Andy Flanagan Firm: Cascade Drilling Consulting Firm: PGG Logged by: Glen Wallace Location: Terminal 108, Seattle, Washington Well Name: PGG-7 Ecology ID: APQ001 MP Elevation: 12.24 Datum: MLLW Installed: 6/5/2006 nr = not recorded Figure A-7 GEOLOGIC LOG AND AS-BUILT FOR WELL PGG-7 Port of Seattle T-108 Seattle, Washington JK0410, 6/6/2006 Appendix C 24 O£PTH 1M Hf,T 0 Boring A ELEVATION lq ~ ~M BROWN AND .~Y SILTY FINE TO 6 MEDIUM SAND (LOOSE) (FILL) ill . 5-- 4 10--- ~ BROWN AHD GRAY FINE TO ";i!! SP MEDIUM SAND (LOOSE) (fill) .. lolL J eRAY SILT WITH A TRACE Of ORGANIC MATERIAL (MED IUM STI rF') DARK GRAV SILTY FIHE TO MEDIUM SAND (VERY LOOSE) l1li 20 - ElE'VAiION 1() + o SM DARK BROWN AND BLACK SILTY FIN E I; TO HEDIUN SAnO·WllH OCCASIONAL III 5 2 15 Boring 6 OtP'l'H Ht F[[1 10 * If ,It 18'! 15 20 I W"' 25 BORING COMPLETED 10-26-81 GROUND WATER ENCOUNTERED AT DEPTH OF 10.7' ON 10-26-61 2" DIAMETER PVC WELL CASING INSTALLED TO DEPTH Of 19', SCREENED IN LOWER 5' 25 0 5 - mni ! 10 . 15 GRADES WITH A TRACE OF CLAY AHD TO VERY SOFT 3 III 20 BORING COMPLETED 10-26·81 GROUND WATER ENCOUNTERED AT DfPTH OF 13.4' ON lD-26-81 2S 2 11 DIAMETtR Pvc w£l.l. CASING JNSTAL.1.ED TO DEPTH or 20'. SCREENED IN LOWER 5' Key; 6 lolL DARK GRAY TO BRaWN SILTV FINE TO MEDIUM SAND WITH ORGANIC MATERIAL (VERY LOOSE) GRAY SILT WITH A TRACE OF ORGANIC HATERIAL (VERY SOFT) DEM"H 10 FEET ELEVATION 16 t SM BROWN AND DARK GRAY SILTY FINE ~ TO MED IUM SAND (VERV LOOSE) I (FILL) 5~ GRADES TO BLACK WITH LUMPS OF GRAY SILT AND ORGANIC MATERIAL 10 ~ ~Rf.~ GRADES TO MEOIUM DENSE lolL GRAV SANOV SILT (VERY SOFT) o 1 15 .. 2 20 - - 4 II LW.l.....1 BORING COMPLETED 10-26-81 GROUNO WATER ENCOUNTERED AT DEPTH OF 25 _ _.J 12.1' ON 10-27-81 2" DIAMETER PVC WELL CAS ING ItlSTALLED TO OEPTH Of 19'. SCREENED IN LOWER 5' Notes: 6LOWS REQUIRED TO DRIVE DAMES & MOORE SAMPLER ON, FOOT WITH A HAMMER WEIGHT Of 325 LBS. AND A STROKE OF 30 INCHES. r DARK GRAY AND BLACK SILT WITH Boring D ELEVATION 19 + SM BROWN AND BLACK S I lTV FINE Tlo 10 MEDIUM SAND WITH A TRACE OF II GRAVEL AND ORGANIC """ SP LOOSE) (fl LL) KATERIAL DARK GRAV AND BROWN fiNE TO ~EOIUM SAND (LOOSE) (FILL) ML GRAY SANOY SILT WITH A TRACE OF 2 ORGAN'C MATERIAL (MEDIUM STlf f) , ML "l:lL ORGAN IC MATERIAL (VERY 50FT) BORING COMPLETED to-26-8l GROUND WATER ENCOUNTERED AT DEPTH Of 11.2' ON 10-26-61 2" DIAMETER pvc WELL CASING INSTALLED TO DEPTH OF 19', SCREENED IN LOWER 5' Boring C OCPTH IN FEET LUHPS Of GRAY, CLAVEY SiLT (LOOSE) (FILL) GRADES WITH GRAVEL AND DECAYED DR~IC KATERIAL .. INDICATES DEPTH AT WHiCH UNDISTURBED DAMES. MOORE SAMPLE WAS EXTRACTED. a IHDICATES DEPTH AT WHICH DISTURBED DAMES & MOORE SAMPLE WAS EXTJW:T£O. 1. tHE DISCUSSIO~ IN THE TEXT OF THIS REPORT IS NECESSARY FOR A PROPER UNDERSTANDING OF THE NATURE OF THE SUBSuRFACE MATERIAL. 2. THE ELEVATIONS SNOWN HAVE BEEN ESTIMATED fROM MAPS AND SMOUlO 8E CONSIDERED APPROXIMATE; DATUM IS H.LW. lOG OF BORINGS 1910-058 Plate 2C Appendix 25 Pt:PTH IN mT o 5 10 15 Borlng E ELEVATION 16 t 8M DARK GRAY AND BROWN SILTY fl HE 4 TO MEDIUH SAND WITH OCCASION AL II LUMPS OF GRAY CLAYEY SILT (LOOSE) (F ILL) :::::: IiIP DAR~ GRAY FINE SA~D (LOOSE) :::::: (FI L~) ~ ---- ~ mm mm Ml GRAY SANDY SI~T 1 1 20 25 rt o Boring F "L ;;~~;;r~EL~E~Vr:AtT~10~Hfyl:'6mt:r-:w~m'V:SAAii ~ 8M .. :~: GP . GRAY SANOY SILT AND SilTY SAND !I~. \(STIFF TO KEDIUM OENSE) (FILL) 5 --.......j 7 4." SM COHCRETE RUBBl); (f I LLl II REDDISH-BROWN AND GRAY SILTY 8 8M fiN); TO MEDIUM SAND WITH 10 - - - j III OCCASIONAL LUMPS OF GRAY l1t\h;irl'l¥C~LA~Y!.EY~S.ILT (LOOSE) (FILL) lolL OARK GRAY fl NE SAND (LOOSE) (FILL) 15 - _ . GRAY SilT (SOFT) I GRADES TO VERY SOFT i (VERY SOFT) II DEPTH III flfT 20---I BORING COMPLETED 10-26-81 GROUNO WATER ENCOUNTERED AT DEPTH OF 8.5' ON 10-27-81 2" DIAMETER PVC WE~~ CASING INSTA~LED TO DEPTH OF 19'. SCREENED I N LOWER 5' WlBOWR~ILN-G.JCOMPlETED 25 - _ . . . I 10-26-81 GROUND WATER ENCOUNTERED AT DEPTH OF 7.7' ON 10-27-81 2" DIAMETER PVC I/El~ CASING INSTAllED TO DEPTH OF 19'. SCREENED IN LOWER 5' LOG OF BORINGS 191(}-()58 Appendix C Plate 326 Boring 88-1 Depth In Feet o r samPle Symbol Elevation 5 9' P-!II!I!II!l-,S="'p::-l 6· asphaltic concrete Brown to gray poorly graded .and (very loose to medium dense) (fill) 17'1,-87 J 1 J • 160'1,-30 15 : 38.'1,-82 19'1.-112 :. ] 1 34 '1,-84 • P1 Fibrous peat (very soft to .. 5 18%-116 soft) ., 55 4 ! M L Gray silt interbedded with grades medium dense hl n levels of silty sand tstiff) 60 21 • 24 '1,-105 25 56 lao ~ J.J ,SW Grar well graded sand with o~ ~b ~d 0 d~ 65 sil (loose to medium dense) Note:,enetration resistance at 2 'not representative 0 f material encountered. at> -]1 ~.o 30 24'1,-99 J[ Jl JI J grade. dense 50 3 20 ]1 "0 Water level at 10:00am on June 29, 1988 10 J1 1 r samp'e Symbol ,.18'1,-98 -- 1 _. grades with lenses of silt 5 Depth In Feet 10 d~ \:It> '-"-'_..JBoring terminated at 69.5 feet on J"'une 29, 1988 70 • p~o d~ ~b ~: 35 21'1,-110 2 .. • 8~ ~: d~ 75 \\t> Q 0 to 40 1'1 'c ..,. 80 Log of Borings --, Dame. & Moore Appendix C J I-J-O-b-N-o-.-1-7-"-0-5-.-0-0-·-1---0-1-·- 6 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - P - . - . - t - e - A27- --1..J JI J1 J J Boring 88-2 Depth in Feet o r III I ~ I'li I UL Elevation ·30' Black organic silt (very aoft to softJ b 35 20~·108 • Depth In Feet 40 ~~, 45 o~ ~b 10 • ~d( ~~ Q~ 10 35 Symbol 28~-94 ~ Gray we!1 graded sand with ANO BROWNISH-GRAY >llTY MfDtUM TO COARSE (VfRY lOQ)E}(FILl) • •, :;: 15---l • X GRADES TO VERY lOOSE I • ••• • ... :;: GRAY SANDY SILT WITH MEOIUM SAND AND OCCASIONAL ROUNDfO GRAVEL lO----j •• 25 __....J GROUND WATER ENCOUNTERfO AT OEPTH BORING 5 BORING 3 5---1 10----1 ;; WITH OC'::ASIONAL FINE GRAVEL (LOOSEl (Fill) ., • " ." 15----1 • I • 20---1 , GRADES COARSER AND • 10----1 •I 3 Sf' DARK GRAY FINE TO MEDIUM SAND (LOOSEl (fiLL) • ~ ;; GRADES SILlY MOTTlfD GRAY AND 8LACK CLAYEY SILT WITH ORGANIC MATERIAL {VERY 50FT TO 50FT) Ii LllllJ,L....J BORING GRADES TO DARKER GRAY COMPLETED 6-17-81 GROUND WATER ENCOUNTERfD AT DEPTH Of 17 FEET AT 1215 HRS, 6-17-81 25----' 18.5% _ 92 TO vEflY LOOSE I Q H[VAlluN 2Cl:t SM BROWNISH-GRAY 10 BLACK SILlY MEDIUM TO COARSE SAND WlTH OCCASIONAL GRAY CLAYEY Sit 1 LUMPS (vERY LOOSE TO LOOSE) (fiLL) Hf'lt-IION 1900 SM DARK GRAY SILTY fiNE TO MWIUM SAND 15.~o" 99 MATTeR (VeRY SOFT 1'O SOFl) .. lllUJJ_J80RING COMPUHO 6-17-81 NO GROUND WAl[1l [NCOUNHRfO SLIGHTLY CLAYEY aQRING COMPLETED 6-17-81 OF 104~ FEET AT 1115 HRS, 6-1]-81 ~ ~ GRAY CtAYEY Sltl WllH OeCAYfO ORGANIC ,j, (MEDIUM STIFF) GRADES TO SOFT AND 25 o_ _ ELEVATION 19o1. Ml.. DARK GRAY >ANOY >ILTWlTHA TRACE OF ORG"NIC MATTH (SOFT) (STIFF IN UPPER J FHl) (fiLL) £ 15----1 til o , l141111i.... .1GRAY CLAYEY SILT WITH ORGANIC • MATTER (>OFT) ",---; SORING COMPLETED 6-17-81 NO GROUND WATER ENCOUNTERED 25----' LOG OF BORINGS Dames & Moore Appendix C 31 Plate A2 I I BORING 8 BORING 6 0 _ _. , 8M 7 22.8"lro·96 20 .--., EL(VATION I~ • , •, •, •, •, •, • Ii DAR~ BROWNISH-GRAY SILTY MEDIUM TO 'lIlUij"",,+,C~O~ARst SAND (lOOS£) (fiLL) ARK GRAY FIN£ TO M{OIUM SAND WHH OCCASIONAL FINE ROUNDED GRAVEL {lOOS£} (fiLL) DARK GRAY SILTY FINE TO MEDIUM SAND WITH OCCASIONAL LUfN'S OF GRAY CLAYEY SILT AND A TRACE Of DECAYfD ORGANIC MATERIAL (\lOY LOOSE) (fiLL) ELEVATION 18dr • 5 5 ,. 19.3% • 103 " • .., •, •, • • 20 (SOFT) • • ELEVATION 1.::- 10 ~ 0 20 •, •, 8 • (LOOS£) (fiLl) 5 E ~ ~ GRADES WITH OCCASIONAL ROOTS •, • • •, •, • 8 12 10 ~ III 15 WITH A TRACE OF FINE GRAVEL AND ROOTS 19.5% - 103 , r £ 8M BROWNISH TO BLACK mTY MEOIUM SAND WITH OCCASIONAL fINE GRAvEL (VERY LOOSE TO lOOSE) (fill) III ~ 0 8M 8ROWNISH~GRA y TO 8LACK SIt TY SAND 19.6~~· 97 BORING COMPLEHD H8·61 GROUND WATER fNCOUNTHEQ AT DEP'TH OF 13.0 fEET AT 1000 HRS, 6-18-81 BORING 9 EHVATION 19t 5 GRADES SOfT J BORING 7 • , •, •, Ml GRAY CLAYEY SILT (VERY 50FT TO 50FT) 4 25 2 5 - -..... 0 GRADES TO DARKER GRAv J .... DARK GRAY CLAffY ORGANIC SILT WITH A TRACE Of DECAYfD ORGANIC MATHR 80RING COMPLETED 6-17-81 NO GROUND WAHR ENCOUNTERfD 0 8M BROWNISH-GRAY TO BLACK M£OIUM SAND WITH OCCASIONAL FINE GRAVEL (VERv LOOSE TO LOOSE) (M£OIUM DENSE IN Ul'PER " FEET) (FILL) 2J r. 15 7 .... GRADES TO BLACK WITH DfCAY[D ORGANIC MATERIAL GRAY CLAYEY SILT WITH OCCASIONAL DECAYED ORGANIC MATHIAl (SOFT) (MEDIUM STIff IN UPPER 2 HET) BORING COMPLETED 0-18.81 GROUNO WAHR ENCQUNTfRfO AT DEPTH Of 15.0 FEH AT 1-400 HRS, 0·18·81 BLACK COARSE SAND (LOOSE) (fill) GRADES FINER GRAY CI.AYEY SILT (SOfT) WRING COMPLETED 6·18-81 GROUND WATER ENCOUNTfRfD AT DEPTH 20 Of 16.0 fEET AT 0920 HRS, 6·18·81 15 LOG OF BORINGS Appendix C 32 ,.,." Dames & Moore -' 0 BORNG 10 BORING 12 ELEVATION 19:t ElEVATION l~ 8M • II 10 35.8% ~608 ~ ~ , , WITH A TRAC[ OF FINE GRAVEL AND OCCA~ SlaNAl LUWS OF GlV.Y ClAYEY SILT 4 33.6% - eo 15 GRADES WITH DECAYED ROon GRAY ClAYEY SILT (VERY SOFT) 4 II 4 I II ... , t' 73.2% - S4 g GRADES COARSER DARK GRAY TO IlLACK SILTY MEDIUM SAND WITH OCCASIONAL DECAYED ORGANIC fu Q " I GRADES sen II BLACK MEDIUM SAND (MEDIUM DfNSf) " II II SORING COMPLETED 6M18~81 GROUND WATER ENCOUNTER£D AT DEPTH OF 1,H FEE! AT 1445 HRS, 6-18 M81 80RING COMPLETfD 6~19M81 GROUND WATER ENCOUNTERED AT DEPTH OF 10.0 FEET AT 0820 HRS, 6M19-(l1 75 BORING 13 BORING 11 I OCCASIONAL LENSES OF FINe SAND II IJ 5 II ElEVATION 2$:t. 8M DARK GRAY TO BLACK SILTY fiNE TO MEDIUM SAND WITH A TRACE OF OKAyED ORGANIC MATERIAL (LOOSf, MEDIUM OENS-E) (FilL) ELEVATION 18:l< 0 8M 8ROWNISH~GRAY SILTY FINE S-AND WITH 6 OCCASIONAL LUMPS OF BROWN CLAYEY SIL T (VfRY LOOH TO lOOSf) (FilL) I GRADES TO DARK GRAY WITH LUMI'SOF BLACK ORGANIC MATERIAL II II " II 23,3~o·96 23.5% ~ 92 3 II 10 BLACK COARSE SAND (LOOSE) (MEDIUM DENSE IN UPPER t! HET) (FILL) 17 II . ~ " ~ I '" 75 £, II i. 6 II 15 II 4 II , ~ Q II II " Ml GRAY CLAYEY SIL T (MEDIUM STIFF) ... II 10 ~ !£" 7 II 15 GRAY CLAYEY SILT WITH ORGANIC MATUIAL (VERY SOfT) II '" GRADES TO MfDIUM STIFF BLACK SILTY MEDIUM SAND WITH OCCASIONAL DECAYED ORGANIC MATERIAL (LOOSE) (fILL) GRADES TO DARKER GRAY WITH LESS ORGANIC I 3% (except for metals, phenols and some miscellaneous extractable organics which are always compared to dry weight AETs). - Port_ of SeanIe Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 21 Yellow Highlight – parameter detected Italics – TOC <0.5% or >3%. * – Exceeds SQS-AET dry weight criteria. µg/kg – micrograms per kilogram # – Exceeds CSL-AET dry weigh criteria mg/kg – milligram per kilogram AET – apparent effects threshold PAH – Polycyclic Aromatic Hydrocarbon CSL – cleanup screening level PCB – Polychlorinated Biphenyls HPAH – high-molecular-weight Polycyclic Aromatic Hydrocarbon SQS – sediment quality standard - Port_ of SeanIe Terminal 108 Environmental Conditions Report SMS – Washington State Sediment Management Standards FINAL Appendix D January 23, 2009 Page 22 Table D-9. Summary of bank soil analytical chemistry (organic carbon normalized) – SMS screening conducted on August 17, 2005 CHEMICAL / SAMPLE INFORMATION DUD_30C DUD_31C Sample ID L36565-1 L36565-2 Depth Interval 0-3 cm 0-3 cm SMS SQS SMS CSL Conventionals (%) Total solids -- -- 83.2 95.3 Total Organic Carbon -- -- 1.05 0.377 Arsenic 57 93 6 JL 2.6 U Cadmium 5.1 6.7 0.18 U 0.28 Chromium 260 270 55.9 31 Copper 390 390 61.8 158 Lead 450 530 94.4 7.8 Mercury 0.41 0.59 0.468* 0.031 Silver 6.1 6.1 2.62JG 0.79 Zinc 410 960 61.9J 85.8 12 65 77.6*# 4.39 Naphthalene 99 170 1.52U 0.743U Acenaphthylene 66 66 1.52U 0.743U Acenaphthene 16 57 1.52U 0.743U Fluorene 23 79 1.52U 0.743U Phenanthrene 100 480 4.17 2.34 Anthracene 220 1200 1.52U 0.743U 2-Methylnaphthalene 38 64 1.52U 0.743U Total LPAH (SMS) 370 780 4.17 2.34 Fluoranthene 160 1200 10.7 5.99 Pyrene 1000 1400 9.41 5.17 Benzo(a)anthracene 110 270 3.9 2.22 Chrysene 110 460 5.24 3.93 Benzo(a)pyrene 99 210 4.51 3.63 Indeno(1,2,3-cd)pyrene 34 88 3.7 2.89 Dibenzo(a,h)anthracene 12 33 1.52U 0.875 Benzo(g,h,i)perylene 31 78 4.36 3.5 Metals (mg/kg) PCBs (mg/kg-OC) Total PCBs (SMS) LPAH (mg/kg-OC) HPAH (mg/kg-OC) - Port_ of SeanIe Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 23 DUD_30C DUD_31C Total benzofluoranthenes (SMS) CHEMICAL / SAMPLE INFORMATION 230 450 10.3 7.72 Total HPAH (SMS) 960 5300 52.1 35.9 1,4-Dichlorobenzene 3.1 9 0.152U 0.0743U 1,2-Dichlorobenzene 2.3 2.3 0.687 0.0743U 1,2,4-Trichlorobenzene 0.81 1.8 0.152U 0.0743U Hexachlorobenzene 0.38 2.3 0.305U 0.149U Dimethylphthalate 53 53 3.05U 1.49U Diethylphthalate 61 110 3.05U 1.49U Di-n-butylphthalate 220 1700 3.62J 2.41 Butylbenzylphthalate 4.9 64 3.05U 16.2* bis(2-Ethylhexyl)phthalate 47 78 13.1 10.4 Di-n-octylphthalate 58 4500 3.05U 1.49U Phenol 420 1200 1300J*# 14.7 2-Methylphenol 63 63 32U 5.6U 4-Methylphenol 670 670 32U 5.6U 2,4-Dimethylphenol 29 29 16U 2.8U Pentachlorophenol 360 690 81U 14U Dibenzofuran 15 58 1.52U 0.743U Hexachloroethane 3.9 6.2 0.771U 0.371U n-Nitrosodiphenylamine 11 11 3.05U 1.49U Benzyl alcohol 57 73 32U 5.6U Benzoic acid 650 650 846J*# 116 Chlorinated Hydrocarbons (mg/kg-OC) Phthalates (mg/kg-OC) Phenols (μg/kg) Misc Extractables (mg/kg-OC) Misc Extractables (μg/kg) Source: (Anchor 2007) Note: metals, phenols and some miscellaneous extractable organics are not compared to organic carbon normalized values but only to dry weight AETs regardless of the organic carbon value. Green Highlight – Exceeds TOC applicable criteria. Yellow Highlight – parameter detected * – Exceeds SQS-AET dry weight criteria. µg/kg – micrograms per kilogram # – Exceeds CSL-AET dry weigh criteria. mg/kg – milligrams per kilogram OC – organic carbon Italics – TOC <0.5% or >3%. PCB – Polychlorinated Biphenyls -- TOC undetected; not normalized PAH – Polycyclic Aromatic Hydrocarbon AET – apparent effects threshold SQS – sediment quality standard cm – centimeters SMS – Washington State Sediment Management Standards CSL – cleanup screening level - Port_ of SeanIe Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 24 Table D-10. Historical test pit soil sample results conducted on July 20, 1981 TP81-1 (mg/kg) TP81-2 (mg/kg) TP81-3 (mg/kg) TP81-4 (mg/kg) TP81-5 (mg/kg) TP81-6 (mg/kg) Depth (feet bgs) 9.5 10 10 9 8 5.5 Aroclors (1242 & 1254) 0.432 1.19 0.803 1.72 0.225 2.11 CHEMICAL ANALYTICAL METHOD Arsenic 6010/7000 6.3 12 9 5.2 4.4 4.2 Cadmium 6010/7000 0.63 0.54 0.54 0.64 0.58 0.69 Chromium 6010/7000 17 13 16 27 14 16 Lead 7240 16 14 17 33 16 18 Mercury 6010/7000 0.02 U 0.02 U 0.04 0.19 0.02 U 0.02 U Zinc 6010/7000 49 50 46 63 34 36 82.6 86.5 84.1 81.2 83 83.9 Total Solids Source: (Pacific Groundwater Group 2006) Green Highlight – Exceeds TOC applicable criteria. Yellow Highlight – parameter detected Investigation – Dames and Moore bgs – below ground surface mg/kg – milligram per kilogram PCB – Polychlorinated Biphenyls TP – test pit - Port_ of SeanIe Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 25 Table D-11. Historical soil sample results prior to land-farming, conducted July 19, 1990 CHEMICAL TPH-Gasoline ANALYTICAL METHOD EPA 8015 A (MG/KG) nd B (MG/KG) nd C (MG/KG) nd D (MG/KG) nd E (MG/KG) nd F (MG/KG) nd DETECTION LIMIT 25 Benzene EPA 8020 nd nd nd nd nd nd 0.05 – 0.062 Toluene EPA 8020 nd nd nd nd nd nd 0.05 – 0.062 Ethyl-Benzene EPA 8020 nd nd nd nd nd nd 0.05 – 0.062 Total Xylenes EPA 8020 nd nd nd nd nd nd 0.05 – 0.062 Source: (Pacific Environmental Group 1991) Yellow Highlight – parameter detected EPA – US Environmental Protection Agency mg/kg – milligram per kilogram nd – not detected TPH – total petroleum hydrocarbons - Port_ of SeanIe Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 26 Table D-12. Historical stockpile soil sample results after land-farming, conducted September 28, 1990 CHEMICAL ANALYTICAL METHOD SP-1 (COMPOSITE) (mg/kg) SP-2 (COMPOSITE) (mg/kg) SP-3 (COMPOSITE) (mg/kg) DETECTION LIMIT TPH-EPA 418.1 EPA 418.1 110 110 130 5 TPH-Gasoline EPA 8015 28 nd 10 1 Benzene EPA 8020 nd nd nd 0.05 Toluene EPA 8020 nd nd nd 0.1 Ethyl-Benzene EPA 8020 nd nd nd 0.1 Total Xylenes EPA 8020 nd nd nd 0.1 FINAL Appendix D January 23, 2009 Page 27 Source: (Pacific Environmental Group 1991) Note: This soil has reportedly been removed Yellow Highlight – parameter detected EPA – US Environmental Protection Agency mg/kg – milligram per kilogram nd – not detected TPH – Total Petroleum Hydrocarbons - Port_ of SeanIe Terminal 108 Environmental Conditions Report Table D-13. Historical stockpile soil sample results after land-farming, conducted November 6, 1990 SAMPLE ID Analytical Method TPH-EPA 418.1 (mg/kg) TPHGASOLINE (mg/kg) BENZENE (mg/kg) TOLUENE (mg/kg) EPA 418.1 EPA 8015 EPA 8020 EPA 8020 ETHYL-BENZENE (mg/kg) TOTAL XYLENES (mg/kg) EPA 8020 EPA 8020 SP-1 110 nd nd nd nd nd SP-2 130 nd nd nd nd nd SP-3 150 nd nd nd nd nd SP-3A 150 nd nd nd nd nd SP-4 96 nd nd nd nd nd SP-5 73 nd nd nd nd nd SP-6 160 nd nd nd nd nd SP-7 120 nd nd nd nd nd SP-8 170 nd nd nd nd nd SP-9 79 nd nd nd nd nd SP-10 83 nd nd nd nd nd SP-11 42 nd nd nd nd nd SP-12 190 nd nd nd nd nd Detection Limit 5 1 0.05 0.1 0.1 0.1 Source: (Pacific Environmental Group 1991) Note: This soil has reportedly been removed Yellow Highlight – parameter detected EPA – US Environmental Protection Agency mg/kg – milligram per kilogram nd – not detected TPH – Total Petroleum Hydrocarbons - Port_ of SeanIe Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 28 Table D-14. Historical stockpile soil sample results at the former Chiyoda site conducted June 21, 1989 and March 19, 1990 DATE (mg/kg) nd TOTAL XYLENES (mg/kg) 0.011c TPH (mg/kg) 212 BARIUM (mg/L) nd CADMIUM (mg/L) nd FUEL HYDROCARBONS (mg/kg) 63 / 110 FUEL TYPEa Diesel #2/turpentine SAMPLE ID WS-1b SAMPLED 6/21/1989 ES-1b 6/21/1989 nd nd 0.017 0.107 c 344 nd nd 53 / 670 Diesel #2/turpentine SP-N1 3/19/1990 nd nd nd 0.27 200 0.032 0.002 60 Gasoline SP-N2 3/19/1990 nd nd nd 0.14 180 0.077 0.003 nd SP-N3 3/19/1990 nd nd nd 1.2 230 0.046 nd 48 SP-N4 3/19/1990 nd nd nd nd 260 0.061 nd nd 3/19/1990 nd nd nd 0.056 410 0.061 nd 200 3/19/1990 nd nd nd 0.57 na na na na 3/19/1990 nd nd nd 0.49 360 0.071 nd 150 3/19/1990 nd nd nd 0.51 na na na na 3/19/1990 nd nd nd 0.18 810 0.044 nd 84 3/19/1990 nd nd nd 0.14 200 0.049 nd nd 3/19/1990 nd nd nd 0.15 230 0.062 nd nd SP-S1 SP-S1 d SP-S2 SP-S2 d SP-S3 SP-S4 SP-4A e TOLUENE (mg/kg) nd ETHYLBENZENE BENZENE (mg/kg) nd Source: (Thorne Environmental 1990) a Identified only if analyte detected b Samples taken from stockpile at service station site prior to being exported to the Chiyoda site c Individual isomers have been combined into a total xylene result d Sample analyzed twice by laboratory e Duplicate of sample S4 Yellow Highlight – parameter detected Analytical Method – EPA 8015 EPA – US Environmental Protection Agency mg/kg – milligram per kilogram na – not analyzed nd – not detected at the analytical detection limit of 25 mg/kg - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 29 Gasoline Gasoline Gasoline Gasoline Table D-15a. Analytical summary of groundwater sampling, round 1, conducted June 13 and 14, 2006, PGG-1 through PGG-5 CHEMICAL/SAMPLE INFORMATION ANALYTICAL METHOD a UNIT Coordinates a PGG-1 (6/13/06) PGG-1 (6/14/06) PGG-2 PGG-3 PGG-4 PGG-5 N: 209009.53 E: 1267978.45 N: 209009.53 E: 1267978.45 N: 208857.20 E: 1267450.88 N: 208484.34 E: 1267594.69 N: 208550.85 E: 1268179.67 N: 208967.95 E: 1267349.68 6.88 5.92 6.03 6.36 7.10 pH Temp °C 16.83 15.2 13.44 15.36 13.48 Dissolved Oxygen mg/L 0.5 1.74 1.36 2.32 0.47 Electrical Conductivity mS/cm 4.96 1.357 0.591 1.172 1.868 Oxidation Reduction Potential mV -290.2 84.5 -338.3 -210.4 -295.2 MTCA METHOD A Petroleum Hydrocarbons Gasoline Range HC NWTPH-Gx/8021B µg/L 50.0 U 50.0 U 50.0 U 50.0 U 50.0 U 1000 Benzene NWTPH-Gx/8021B µg/L 0.500 U 0.500 U 0.500 U 0.500 U 0.500 U 5 Toluene NWTPH-Gx/8021B µg/L 0.500 U 0.500 U 0.500 U 0.500 U 0.500 U 1000 Ethylbenzene NWTPH-Gx/8021B µg/L 0.500 U 0.500 U 0.500 U 0.500 U 0.500 U 700 Xylenes (total) NWTPH-Gx/8021B µg/L 1.000 U 1.000 U 1.000 U 1.000 U 1.000 U 1000 Diesel Range HC NWTPH-Dx mg/L 0.255 U 0.272 U 0.250 U 0.250 U 0.253 U 0.250 U 500 Lube Oil Range HC NWTPH-Dx mg/L 0.51 U 0.543 U 0.500 U 0.500 U 0.505 U 0.500 U 500 Arsenic EPA 6020 mg/L na 0.00628 0.00381 0.001 U 0.005 0.0107 0.005 Cadmium EPA 6020 mg/L na 0.001 U 0.001 U 0.001 U 0.001 U 0.001 U 0.005 Chromium EPA 6020 mg/L na 0.0078 0.00622 0.001 U 0.00538 0.00985 0.05 Copper EPA 6020 mg/L na 0.011 0.00316 0.00198 0.00791 0.00205 na Total Metals - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 30 UNIT PGG-1 (6/13/06) PGG-2 PGG-3 PGG-4 PGG-5 MTCA METHOD A Lead EPA 6020 mg/L na 0.0168 0.00249 0.001 U 0.00324 0.001 U 0.015 Nickel EPA 6020 mg/L na 0.00598 0.0381 0.0134 0.00816 0.00247 na Zinc EPA 6020 mg/L na 0.0747 0.36 0.0446 0.049 0.001 U na Arsenic EPA 6020-Diss mg/L na 0.00577 0.00378 0.00103 0.0104 0.0104 0.005 Cadmium EPA 6020-Diss mg/L na 0.001 U 0.001 U 0.001 U 0.001 U 0.001 U 0.005 Chromium EPA 6020-Diss mg/L na 0.00246 0.00455 0.00108 0.00892 0.00892 0.05 Copper EPA 6020-Diss mg/L na 0.001 U 0.00173 0.00155 0.00138 0.00138 Lead EPA 6020-Diss mg/L na 0.001 U 0.001 U 0.001 U 0.001 U 0.001 U 0.015 Nickel EPA 6020-Diss mg/L na 0.0031 0.0347 0.0111 0.0029 0.0029 na Zinc EPA 6020-Diss mg/L na 0.0249 0.435 0.0436 0.069 0.001 U na CHEMICAL/SAMPLE INFORMATION ANALYTICAL METHOD a a PGG-1 (6/14/06) Dissolved Metals Polychlorinated Biphenyls Aroclor 1016 EPA 8082 Mod µg/L na 0.100 U 0.100 U 0.100 U 0.100 U 0.100 U na Aroclor 1221 EPA 8082 Mod µg/L na 0.100 U 0.100 U 0.100 U 0.100 U 0.100 U na Aroclor 1232 EPA 8082 Mod µg/L na 0.100 U 0.100 U 0.100 U 0.100 U 0.100 U na Aroclor 1242 EPA 8082 Mod µg/L na 0.100 U 0.100 U 0.100 U 0.100 U 0.100 U na Aroclor 1248 EPA 8082 Mod µg/L na 0.100 U 0.100 U 0.100 U 0.100 U 0.100 U na Aroclor 1254 EPA 8082 Mod µg/L na 0.100 U 0.100 U 0.100 U 0.100 U 0.100 U na Aroclor 1260 EPA 8082 Mod µg/L na 0.100 U 0.100 U 0.100 U 0.100 U 0.100 U na Aroclor 1262 EPA 8082 Mod µg/L na 0.100 U 0.100 U 0.100 U 0.100 U 0.100 U na Aroclor 1268 EPA 8082 Mod µg/L na 0.100 U 0.100 U 0.100 U 0.100 U 0.100 U na Polycyclic Aromatic Hydrocarbons 1-Methylnaphthalene EPA 8270C-HVI µg/L 0.105 U 0.0952 U 0.286 0.0943 U 0.0952 U 0.0943 U na 2-Methylnaphthalene EPA 8270C-HVI µg/L 0.105 U 0.0952 U 0.0943 U 0.0943 U 0.0952 U 0.0943 U na Acenaphthene EPA 8270C-HVI µg/L 0.115 0.138 0.0943 U 0.0943 U 0.0952 U 0.0943 U na - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 31 a UNIT PGG-1 (6/13/06) PGG-1 (6/14/06) PGG-2 PGG-3 PGG-4 PGG-5 MTCA METHOD A µg/L 0.105 U 0.0952 U 0.0943 U 0.0943 U 0.0952 U 0.0943 U na EPA 8270C-HVI µg/L 0.105 U 0.0952 U 0.0943 U 0.0943 U 0.0952 U 0.0943 U na Benzo(ghi)perylene EPA 8270C-HVI µg/L 0.105 U 0.0952 U 0.0943 U 0.0943 U 0.0952 U 0.0943 U na Fluoranthene EPA 8270C-HVI µg/L 0.105 U 0.0952 U 0.0943 U 0.0943 U 0.0952 U 0.0943 U na Fluorene EPA 8270C-HVI µg/L 0.105 U 0.0952 U 0.111 0.0943 U 0.0952 U 0.0943 U na Naphthalene EPA 8270C-HVI µg/L 0.105 U 0.0952 U 0.136 0.0943 U 0.0952 U 0.0943 U na Phenanthrene EPA 8270C-HVI µg/L 0.105 U 0.0952 U 0.0943 U 0.0943 U 0.0952 U 0.0943 U na Pyrene EPA 8270C-HVI µg/L 0.105 U 0.0952 U 0.0943 U 0.0943 U 0.0952 U 0.0943 U na Benzo(a)anthracene EPA 8270C-HVI µg/L 0.0105 U 0.00952 U 0.00943 U 0.00943 U 0.00952 U 0.00943 U na Benzo(a)pyrene EPA 8270C-HVI µg/L 0.0105 U 0.00952 U 0.00943 U 0.00943 U 0.00952 U 0.00943 U na Benzo(b)fluoranthene EPA 8270C-HVI µg/L 0.0105 U 0.00952 U 0.00943 U 0.00943 U 0.00952 U 0.00943 U na Benzo(k)fluoranthene EPA 8270C-HVI µg/L 0.0105 U 0.00952 U 0.00943 U 0.00943 U 0.00952 U 0.00943 U na Chrysene EPA 8270C-HVI µg/L 0.0105 U 0.00952 U 0.00943 U 0.00943 U 0.00952 U 0.00943 U na Dibenz(a,h)anthracene EPA 8270C-HVI µg/L 0.0105 U 0.00952 U 0.00943 U 0.00943 U 0.00952 U 0.00943 U na Indeno(1,2,3-cd)pyrene EPA 8270C-HVI µg/L 0.0105 U 0.00952 U 0.00943 U 0.00943 U 0.00952 U 0.00943 U na CHEMICAL/SAMPLE INFORMATION ANALYTICAL METHOD Acenaphthylene EPA 8270C-HVI Anthracene a Source: (Pacific Groundwater Group 2007) a PGG-1 sampled on 6/13 and 6/14 to collect volume requested by laboratory. Green highlight – concentration exceeds MTCA Method A for groundwater Yellow highlight – parameter detected CSL – cleanup screening level EPA – US Environmental Protection Agency HC – hydrocarbons HVI – high volume injection J – parameter detected at the reported concentration; result qualifies as "estimated" due to unacceptable QA results µg/L – micrograms per liter mg/L – milligram per liter na – not applicable NWTPH-Dx – Northwest total petroleum hydrocarbons - diesel extractable - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 32 NWTPH-Gx – Northwest total petroleum hydrocarbons - gasoline extractable SQS – sediment quality standard SAIC – Science Applications International Corporation U – parameter not detected, associated number is the lab reporting limit - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 33 Table D-15b. Analytical summary of groundwater sampling, round 1, conducted June 13 and 14, 2006, PGG-6 through PGG-7 SAIC GROUNDBASED ON CSL SCREENING LEVELS BASED ON SQS MTCA METHOD A WATER CHEMICAL/SAMPLE INFORMATION ANALYTICAL METHOD UNIT Coordinates pH PGG-6 PGG-7 N: 208572.89 E: 1267423.01 N: 208171.87 E: 1267534.03 6.87 6.44 Temp °C 13.21 14.34 Dissolved Oxygen mg/L 0.36 1.56 Electrical Conductivity mS/c m 0.496 0.457 Oxidation Reduction Potential mV -117.6 -432.1 Petroleum Hydrocarbons Gasoline Range HC NWTPH-Gx/8021B µg/L 50.0 U 50.0 U na na 1000 Benzene NWTPH-Gx/8021B µg/L 0.500 U 0.500 U na na 5 Toluene NWTPH-Gx/8021B µg/L 0.500 U 0.500 U na na 1000 Ethylbenzene NWTPH-Gx/8021B µg/L 0.500 U 0.500 U na na 700 Xylenes (total) NWTPH-Gx/8021B µg/L 1.000 U 1.000 U na na 1000 Diesel Range HC NWTPH-Dx mg/L 0.253 U 0.250 U na na 500 Lube Oil Range HC NWTPH-Dx mg/L 0.505 U 0.500 U na na 500 Arsenic EPA 6020 mg/L 0.00166 0.00206 0.37 0.227 0.005 Cadmium EPA 6020 mg/L 0.001 U 0.001 U 0.0034 0.0026 0.005 Chromium EPA 6020 mg/L 0.001 U 0.00127 0.318 0.306 0.05 Total Metals - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 34 SAIC GROUNDWATER CHEMICAL/SAMPLE INFORMATION SCREENING LEVELS BASED ON SQS MTCA METHOD A ANALYTICAL METHOD UNIT PGG-6 PGG-7 BASED ON CSL Copper EPA 6020 mg/L 0.00112 0.00104 0.123 0.123 Lead EPA 6020 mg/L 0.001 U 0.001 U 0.013 0.011 0.015 Nickel EPA 6020 mg/L 0.00255 0.00242 na na na Zinc EPA 6020 mg/L 0.001 U 0.001 U 0.076 0.033 na Arsenic EPA 6020-Diss mg/L 0.00207 0.00234 0.37 0.227 0.005 Cadmium EPA 6020-Diss mg/L 0.001 U 0.001 U 0.0034 0.0026 0.005 Chromium EPA 6020-Diss mg/L 0.00149 0.00156 0.318 0.306 0.05 Copper EPA 6020-Diss mg/L 0.001 0.001 U 0.123 0.123 na Lead EPA 6020-Diss mg/L 0.001 U 0.001 U 0.013 0.011 0.015 Nickel EPA 6020-Diss mg/L 0.00268 0.00213 na na na Zinc EPA 6020-Diss mg/L 0.001 U 0.001 U 0.076 0.033 na Aroclor 1016 EPA 8082 Mod µg/L 0.100 U 0.100 U 2.4 0.44 na Aroclor 1221 EPA 8082 Mod µg/L 0.100 U 0.100 U na na na Aroclor 1232 EPA 8082 Mod µg/L 0.100 U 0.100 U na na na Aroclor 1242 EPA 8082 Mod µg/L 0.100 U 0.100 U na na na Aroclor 1248 EPA 8082 Mod µg/L 0.100 U 0.100 U 1.5 0.27 na Aroclor 1254 EPA 8082 Mod µg/L 0.100 U 0.100 U 0.86 0.16 na Aroclor 1260 EPA 8082 Mod µg/L 0.100 U 0.100 U 0.31 0.058 na Aroclor 1262 EPA 8082 Mod µg/L 0.100 U 0.100 U na na na Dissolved Metals Polychlorinated Biphenyls - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 35 SAIC GROUNDWATER CHEMICAL/SAMPLE INFORMATION SCREENING LEVELS BASED ON SQS MTCA METHOD A ANALYTICAL METHOD UNIT PGG-6 PGG-7 BASED ON CSL EPA 8082 Mod µg/L 0.100 U 0.100 U na na na 1-Methylnaphthalene EPA 8270C-HVI µg/L 0.0943 U 0.0943 U na na na 2-Methylnaphthalene EPA 8270C-HVI µg/L 0.0943 U 0.0943 U 7.1 7.1 na Acenaphthene EPA 8270C-HVI µg/L 0.0943 U 0.0943 U 9.3 2.6 na Acenaphthylene EPA 8270C-HVI µg/L 0.0943 U 0.0943 U 11 11 na Anthracene EPA 8270C-HVI µg/L 0.0943 U 0.0943 U 59 11 na Benzo(ghi)perylene EPA 8270C-HVI µg/L 0.0943 U 0.0943 U 0.029 0.012 na Fluoranthene EPA 8270C-HVI µg/L 0.0943 U 0.0943 U 17 2.3 na Fluorene EPA 8270C-HVI µg/L 0.0943 U 0.0943 U 7 2 na Naphthalene EPA 8270C-HVI µg/L 0.0943 U 0.0943 U 92 54 na Phenanthrene EPA 8270C-HVI µg/L 0.0943 U 0.0943 U 23 4.8 na Pyrene EPA 8270C-HVI µg/L 0.0943 U 0.0943 U 20 14 na Benzo(a)anthracene EPA 8270C-HVI µg/L 0.00943 U 0.00943 U 0.63 0.26 na Benzo(a)pyrene EPA 8270C-HVI µg/L 0.00943 U 0.00943 U 0.27 0.13 na Benzo(b)fluoranthene EPA 8270C-HVI µg/L 0.00943 U 0.00943 U 0.56 0.29 na Benzo(k)fluoranthene EPA 8270C-HVI µg/L 0.00943 U 0.00943 U 0.57 0.29 na Chrysene EPA 8270C-HVI µg/L 0.00943 U 0.00943 U 1.9 0.47 na Dibenz(a,h)anthracene EPA 8270C-HVI µg/L 0.00943 U 0.00943 U 0.013 0.0046 na Indeno(1,2,3-cd)pyrene EPA 8270C-HVI µg/L 0.00943 U 0.00943 U 0.033 0.013 na Aroclor 1268 PAHs Source: (Pacific Groundwater Group 2007) Green highlight – concentration exceeds MTCA Method A for groundwater Yellow highlight – parameter detected - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 36 CSL – cleanup screening level EPA – US Environmental Protection Agency HC – hydrocarbons HVI – high volume injection J – parameter detected at the reported concentration; result qualifies as "estimated" due to unacceptable QA results µg/L – micrograms per liter mg/L – milligram per liter MTCA – Model Toxics Control Act na – not applicable NWTPH-Dx – Northwest total petroleum hydrocarbons - diesel extractable NWTPH-Gx – Northwest total petroleum hydrocarbons - gasoline extractable PAH – Polycyclic Aromatic Hydrocarbon SQS – sediment quality standard SAIC – Science Applications International Corporation U – parameter not detected, associated number is the lab reporting limit - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 37 Table D-16. Analytical summary of groundwater sampling, round 2, conducted September 19 and 20, 2006 SAIC GROUNDCHEMICAL/SAMPLE INFORMATION ANALYTICAL METHOD CSL SCREENING LEVELS BASED ON SQS MTCA METHOD A WATER BASED ON UNIT Coordinates pH PGG-2 PGG-3 PGG-5 PGG-6 PGG-7 N: 208857.20 E: 1267450.88 N: 208484.34 E: 1267594.69 N: 208967.95 E: 1267349.68 N: 208572.89 E: 1267423.01 N: 08171.87 E:1267534.03 6.33 6.34 6.70 6.48 6.56 Temp °C 16.63 16.57 12.83 15.79 16.17 Dissolved Oxygen mg/L 0.9 0.53 0.56 0.92 0.47 Electrical Conductivity mS/cm 1.682 1.697 1.841 1.714 1.717 Oxidation Reduction Potential mV -72.8 47.2 -154.5 19.3 -47.9 Petroleum Hydrocarbons Gasoline Range HC NWTPHGx/8021B µg/L 80.0 U 80.0 U 80.0 U 80.0 U 80.0 U na na 1000 Benzene NWTPHGx/8021B µg/L 0.500 U 0.500 U 0.500 U 0.500 U 0.500 U na na 5 Toluene NWTPHGx/8021B µg/L 0.500 U 0.500 U 0.500 U 0.500 U 0.500 U na na 1000 Ethylbenzene NWTPHGx/8021B µg/L 0.500 U 0.500 U 0.500 U 0.500 U 0.500 U na na 700 Xylenes (total) NWTPHGx/8021B µg/L 1.000 U 1.000 U 1.000 U 1.000 U 1.000 U na na 1000 Diesel Range HC NWTPH-Dx mg/L 0.284 U 0.269 U 0.240 U 0.243 U 0.269 U na na 500 Lube Oil Range HC NWTPH-Dx mg/L 0.568 U 0.472 U 0.481 U 0.485 U 0.472 U na na 500 Arsenic EPA 6020 mg/L 0.00538 0.00156 0.00205 0.00228 0.00168 0.37 0.227 0.005 Cadmium EPA 6020 mg/L 0.001 U 0.001 U 0.001 U 0.001 U 0.001 U 0.0034 0.0026 0.005 Total Metals - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 38 SAIC GROUNDUNIT PGG-2 PGG-3 PGG-5 PGG-6 PGG-7 CSL SCREENING LEVELS BASED ON SQS Chromium EPA 6020 mg/L 0.0135 0.001 U 0.0135 0.001 U 0.001 U 0.318 0.306 Copper EPA 6020 mg/L 0.00533 0.001 U 0.00204 0.001 U 0.001 U 0.123 0.123 Lead EPA 6020 mg/L 0.0073 0.001 U 0.001 U 0.001 U 0.001 U 0.013 0.011 Nickel EPA 6020 mg/L 0.00948 0.00698 0.00637 0.00237 0.00144 na na Zinc EPA 6020 mg/L 0.0692 0.0101 0.0155 0.001 U 0.001 U 0.076 0.033 Arsenic EPA 6020Diss mg/L 0.00611 0.00188 0.00194 0.00208 0.00149 0.37 0.227 0.005 Cadmium EPA 6020Diss mg/L 0.001 U 0.001 U 0.001 U 0.001 U 0.001 U 0.0034 0.0026 0.005 Chromium EPA 6020Diss mg/L 0.0111 0.00166 0.0143 0.001 U 0.001 U 0.318 0.306 0.05 Copper EPA 6020Diss mg/L 0.00136 0.001 U 0.00149 0.001 U 0.001 U 0.123 0.123 Lead EPA 6020Diss mg/L 0.001 U 0.001 U 0.001 U 0.001 U 0.001 U 0.013 0.011 Nickel EPA 6020Diss mg/L 0.0062 0.0059 0.0043 0.00221 0.001 U na na Zinc EPA 6020Diss mg/L 0.0129 0.001 U 0.001 U 0.001 U 0.001 U 0.076 0.033 Aroclor 1016 EPA 8082 Mod µg/L 0.638 R 0.100 U 0.100 U 0.100 U 0.100 U 2.4 0.44 0.1 Aroclor 1221 EPA 8082 Mod µg/L 0.100 UJ 0.100 U 0.100 U 0.100 U 0.100 U na na 0.1 Aroclor 1232 EPA 8082 Mod µg/L 0.100 UJ 0.100 U 0.100 U 0.100 U 0.100 U na na 0.1 CHEMICAL/SAMPLE INFORMATION ANALYTICAL METHOD WATER BASED ON MTCA METHOD A 0.05 0.015 Dissolved Metals 0.015 Polychlorinated Biphenyls - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 39 SAIC GROUNDPGG-2 PGG-3 PGG-5 PGG-6 PGG-7 CSL SCREENING LEVELS BASED ON SQS µg/L 0.100 UJ 0.100 U 0.100 U 0.100 U 0.100 U na na 0.1 EPA 8082 Mod µg/L 0.100 UJ 0.100 U 0.100 U 0.100 U 0.100 U 1.5 0.27 0.1 Aroclor 1254 EPA 8082 Mod µg/L 0.100 UJ 0.100 U 0.100 U 0.100 U 0.100 U 0.86 0.16 0.1 Aroclor 1260 EPA 8082 Mod µg/L 0.100 UJ 0.100 U 0.100 U 0.100 U 0.100 U 0.31 0.058 0.1 Aroclor 1262 EPA 8082 Mod µg/L 0.100 UJ 0.100 U 0.100 U 0.100 U 0.100 U na na 0.1 Aroclor 1268 EPA 8082 Mod µg/L 0.100 UJ 0.100 U 0.100 U 0.100 U 0.100 U na na 0.1 1-Methylnaphthalene EPA 8270CHVI µg/L 0.204 U 0.0943 U 0.0943 U 0.0943 U 0.0943 U na na 2-Methylnaphthalene EPA 8270CHVI µg/L 0.204 U 0.0943 U 0.0943 U 0.0943 U 0.0943 U 7.1 7.1 Acenaphthene EPA 8270CHVI µg/L 0.204 U 0.0943 U 0.0943 U 0.0943 U 0.0943 U 9.3 2.6 Acenaphthylene EPA 8270CHVI µg/L 0.204 U 0.0943 U 0.0943 U 0.0943 U 0.0943 U 11 11 Anthracene EPA 8270CHVI µg/L 0.204 U 0.0943 U 0.0943 U 0.0943 U 0.0943 U 59 11 Benzo(ghi)perylene EPA 8270CHVI µg/L 0.204 U 0.0943 U 0.0943 U 0.0943 U 0.0943 U 0.029 0.012 Fluoranthene EPA 8270CHVI µg/L 0.204 U 0.0943 U 0.0943 U 0.0943 U 0.0943 U 17 2.3 Fluorene EPA 8270CHVI µg/L 0.204 U 0.0943 U 0.0943 U 0.0943 U 0.0943 U 7 2 CHEMICAL/SAMPLE INFORMATION ANALYTICAL METHOD Aroclor 1242 EPA 8082 Mod Aroclor 1248 WATER BASED ON UNIT PAHs - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 40 MTCA METHOD A SAIC GROUNDPGG-2 PGG-3 PGG-5 PGG-6 PGG-7 CSL SCREENING LEVELS BASED ON SQS µg/L 0.204 U 0.0943 U 0.0943 U 0.0943 U 0.0943 U 92 54 EPA 8270CHVI µg/L 0.204 U 0.0943 U 0.0943 U 0.0943 U 0.0943 U 23 4.8 Pyrene EPA 8270CHVI µg/L 0.204 U 0.0943 U 0.0943 U 0.0943 U 0.0943 U 20 14 Benzo(a)anthracene EPA 8270CHVI µg/L 0.0204 U 0.00943 U 0.00943 U 0.00943 U 0.00943 U 0.63 0.26 Benzo(a)pyrene EPA 8270CHVI µg/L 0.0204 U 0.00943 U 0.00943 U 0.00943 U 0.00943 U 0.27 0.13 Benzo(b)fluoranthene EPA 8270CHVI µg/L 0.171 R 0.00943 U 0.00943 U 0.00943 U 0.00943 U 0.56 0.29 Benzo(k)fluoranthene EPA 8270CHVI µg/L 0.129 R 0.00943 U 0.00943 U 0.00943 U 0.00943 U 0.57 0.29 Chrysene EPA 8270CHVI µg/L 0.0204 U 0.00943 U 0.00943 U 0.00943 U 0.00943 U 1.9 0.47 Dibenz(a,h)anthracene EPA 8270CHVI µg/L 0.177 R 0.00943 U 0.00943 U 0.00943 U 0.00943 U 0.013 0.0046 Indeno(1,2,3-cd)pyrene EPA 8270CHVI µg/L 0.16 R 0.00943 U 0.00943 U 0.00943 U 0.00943 U 0.033 0.013 Toxicity Equivalency Calculations Factor Benzo(a)anthracene 0.1 µg/L 0.00 0.00 0.00 0.00 0.00 na na Benzo(a)pyrene 1 µg/L 0.00 0.00 0.00 0.00 0.00 na na Benzo(b)fluoranthene 0.1 µg/L 0.017 R 0.00 0.00 0.00 0.00 na na Benzo(k)fluoranthene 0.1 µg/L 0.0129 R 0.00 0.00 0.00 0.00 na na Chrysene 0.01 µg/L 0.00 0.00 0.00 0.00 0.00 na na Dibenz(a,h)anthracene 0.4 µg/L 0.0708 R 0.00 0.0620 0.00 0.00 na na CHEMICAL/SAMPLE INFORMATION ANALYTICAL METHOD Naphthalene EPA 8270CHVI Phenanthrene - Port_ of Seattle WATER BASED ON UNIT Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 41 MTCA METHOD A SAIC GROUNDCHEMICAL/SAMPLE INFORMATION Indeno(1,2,3-cd)pyrene ANALYTICAL METHOD 0.1 PGG-2 PGG-3 PGG-5 PGG-6 PGG-7 CSL SCREENING LEVELS BASED ON SQS 0.016 R 0.00 0.0132 0.00 0.00 na na 0.1167 R 0.00 0.0756 0.00 0.00 na na WATER BASED ON UNIT µg/L Total Toxicity Equivalency Concentrations (µg/L) Source: (Pacific Groundwater Group 2007) PGG-1: coordinates N: 209009.53 E: 1267978.45, sample was dry, sampled on 6/13 and 6/14 to collect volume requested by lab. PGG-4: coordinates N: 208550.85 E: 1268179.67, sample was dry Green highlight – concentration exceeds MTCA Method A for groundwater Yellow highlight – parameter detected CSL – cleanup screening level EPA – US Environmental Protection Agency HC – hydrocarbons HVI – high volume injection J – parameter detected at the reported concentration; result qualifies as "estimated" due to unacceptable QA results µg/L – micrograms per liter mg/L – milligram per liter mS/cm – milliSiemens per centimeter MTCA – Model Toxics Control Act mV – millivolts PGG – Pacific Groundwater Group R – analytical result rejected based on unrepresentative sample quality and poor data quality, as the sample did not meet Standard Operating Procedures. SAIC – Science Applications International Corporation SQS – sediment quality standard NWTPH-Dx – Northwest total petroleum hydrocarbons - diesel extractable NWTPH-Gx – Northwest total petroleum hydrocarbons - gasoline extractable U – parameter not detected, associated # is the lab reporting limit UJ – parameter not detected at the associated reporting limit; analysis performed 44 days outside holding time - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 42 MTCA METHOD A Table D-17. Analytical summary of groundwater sampling, round 3, conducted February 19 and 20, 2007 CHEMICAL/SAMPLE INFORMATION ANALYTICAL METHOD UNIT Coordinates pH PGG-5 PGG-6 PGG-7 N: 208967.95 E:1267349.68 N: 208572.89 E:1267423.01 N: 208171.87 E: 1267534.03 6.44 6.43 6.24 Temp °C 12.33 11.76 10.78 Dissolved Oxygen mg/L 0.55 0.66 0.56 Electrical Conductivity mS/cm 3.486 1.505 0.646 mV -130.6 -177 -90.6 Oxidation Reduction Potential SAIC GROUNDWATER BASED ON CSL SCREENING LEVELS BASED ON SQS Petroleum Hydrocarbons Gasoline Range NWTPH-Gx/8021B µg/L 50.0 U 50.0 U 50.0 U na na Benzene NWTPH-Gx/8021B µg/L 0.500 U 0.500 U 0.500 U na na Toluene NWTPH-Gx/8021B µg/L 0.500 U 0.500 U 0.500 U na na Ethylbenzene NWTPH-Gx/8021B µg/L 0.500 U 0.500 U 0.500 U na na Xylenes (total) NWTPH-Gx/8021B µg/L 1.000 U 1.000 U 1.000 U na na Diesel Range NWTPH-Dx mg/L 0.236 U 0.248 U 0.243 U na na Lube Oil Range NWTPH-Dx mg/L 0.472 U 0.495 U 0.485 U na na Arsenic EPA 6020 mg/L 0.00172 0.00100 U 0.00115 0.37 0.227 Barium EPA 6020 mg/L 0.04900 0.01000 U 0.01000 U na na Cadmium EPA 6020 mg/L 0.00100 U 0.00100 U 0.00100 U 0.0034 0.0026 Chromium EPA 6020 mg/L 0.00884 0.00100 U 0.00149 0.318 0.306 Copper EPA 6020 mg/L 0.00158 0.00322 0.00100 U 0.123 0.123 Iron EPA 6010B mg/L 105.0 J 9.37000 J 10.6 J na na Lead EPA 6020 mg/L 0.00100 U 0.00100 U 0.00100 U 0.013 0.011 Total Metals - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 43 CHEMICAL/SAMPLE INFORMATION ANALYTICAL METHOD UNIT PGG-5 PGG-6 PGG-7 SAIC GROUNDWATER BASED ON CSL SCREENING LEVELS BASED ON SQS Manganese EPA 6020 mg/L 4.21 J 0.40800 J 0.291 J na na Nickel EPA 6020 mg/L 0.00100 U 0.00324 0.00133 na na Zinc EPA 6020 mg/L 0.01000 U 0.01110 0.01000 U 0.076 0.033 Mercury EPA 7470A mg/L 0.00020 U 0.00020 U 0.00020 U 0.0000074 0.0000052 Arsenic EPA 6020-Diss mg/L 0.00157 0.00100 0.00118 0.37 0.227 Barium EPA 6020-Diss mg/L 0.0400 0.01000 U 0.01000 U na na Cadmium EPA 6020-Diss mg/L 0.00100 U 0.00100 U 0.00100 U 0.0034 0.0026 Chromium EPA 6020-Diss mg/L 0.0105 0.00215 0.00177 0.318 0.306 Copper EPA 6020-Diss mg/L 0.00100 U 0.00209 0.00100 U 0.123 0.123 Iron EPA 6010B-Diss mg/L 37.8 J 9.07 J 11.8 J na na Lead EPA 6020-Diss mg/L 0.00100 U 0.00100 U 0.00100 U 0.013 0.011 Manganese EPA 6020-Diss mg/L 4.01 J 0.43000 0.272 na na Nickel EPA 6020-Diss mg/L 0.00100 U 0.00304 0.00119 na na Zinc EPA 6020-Diss mg/L 0.01000 U 0.01000 U 0.01000 U 0.076 0.033 Mercury EPA 7470A-Diss mg/L 0.00020 U 0.00020 U 0.00020 U 0.0000074 0.0000052 Aroclor 1016 EPA 8082 Mod µg/L 0.100 U 0.100 U 0.100 U 2.4 0.44 Aroclor 1221 EPA 8082 Mod µg/L 0.100 U 0.100 U 0.100 U na na Aroclor 1232 EPA 8082 Mod µg/L 0.100 U 0.100 U 0.100 U na na Aroclor 1242 EPA 8082 Mod µg/L 0.100 U 0.100 U 0.100 U na na Aroclor 1248 EPA 8082 Mod µg/L 0.100 U 0.100 U 0.100 U 1.5 0.27 Aroclor 1254 EPA 8082 Mod µg/L 0.100 U 0.100 U 0.100 U 0.86 0.16 Aroclor 1260 EPA 8082 Mod µg/L 0.100 U 0.100 U 0.100 U 0.31 0.058 Aroclor 1262 EPA 8082 Mod µg/L 0.100 U 0.100 U 0.100 U na na Dissolved Metals Polychlorinated Biphenyls - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 44 CHEMICAL/SAMPLE INFORMATION ANALYTICAL METHOD UNIT PGG-5 PGG-6 PGG-7 SAIC GROUNDWATER BASED ON CSL SCREENING LEVELS BASED ON SQS Aroclor 1268 EPA 8082 Mod µg/L 0.100 U 0.100 U 0.100 U na na Polycyclic Aromatic Compounds Acenaphthene EPA 8270C-HVI µg/L 0.0990 U 0.0980 U 0.0990 U 9.3 2.6 Acenaphthylene EPA 8270C-HVI µg/L 0.0990 U 0.0980 U 0.0990 U 11 11 Anthracene EPA 8270C-HVI µg/L 0.0990 U 0.0980 U 0.0990 U 59 11 Benzo(a)anthracene EPA 8270C-HVI µg/L 0.0099 U 0.0098 U 0.0099 U 0.63 0.26 Benzo(a)pyrene EPA 8270C-HVI µg/L 0.0099 U 0.0098 U 0.0099 U 0.27 0.13 Benzo(b)fluoranthene EPA 8270C-HVI µg/L 0.0099 U 0.0098 U 0.0099 U 0.56 0.29 Benzo(k)fluoranthene EPA 8270C-HVI µg/L 0.0099 U 0.0098 U 0.0099 U 0.57 0.29 Benzo(ghi)perylene EPA 8270C-HVI µg/L 0.0990 U 0.0980 U 0.0990 U 0.029 0.012 Chrysene EPA 8270C-HVI µg/L 0.0099 U 0.0098 U 0.0099 U 1.9 0.47 Dibenz(a,h)anthracene EPA 8270C-HVI µg/L 0.0099 U 0.0098 U 0.0099 U 0.013 0.0046 Fluoranthene EPA 8270C-HVI µg/L 0.0990 U 0.0980 U 0.0990 U 17 2.3 Fluorene EPA 8270C-HVI µg/L 0.0990 U 0.0980 U 0.0990 U 7 2 Indeno(1,2,3-cd)pyrene EPA 8270C-HVI µg/L 0.0099 U 0.0980 U 0.0099 U 0.033 0.013 1-Methylnaphthalene EPA 8270C-HVI µg/L 0.0990 U 0.0980 U 0.0990 U na na 2-Methylnaphthalene EPA 8270C-HVI µg/L 0.0990 U 0.0980 U 0.0990 U 31 18 Naphthalene EPA 8270C-HVI µg/L 0.0990 U 0.0980 U 0.0990 U 92 54 Phenanthrene EPA 8270C-HVI µg/L 0.0990 U 0.0980 U 0.0990 U 23 4.8 Pyrene EPA 8270C-HVI µg/L 0.0990 U 0.0980 U 0.0990 U 20 14 Source: (Pacific Groundwater Group 2007) Green highlight – concentration exceeds MTCA Method A for groundwater Yellow highlight – parameter detected CSL – cleanup screening level EPA – US Environmental Protection Agency J – parameter detected at the reported concentration; result qualifies as "estimated" due to unacceptable QA results - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 45 µg/L – micrograms per liter mg/L – milligram per liter mS/cm – milliSiemens per centimeter MTCA – Model Toxics Control Act mV – millivolts NWTPH-Dx – Northwest total petroleum hydrocarbons - diesel extractable NWTPH-Gx – Northwest total petroleum hydrocarbons - gasoline extractable PGG – Pacific Groundwater Group SQS – sediment quality standard SAIC – Science Applications International Corporation U – parameter not detected, associated # is the lab reporting limit - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 46 Table D-18. Analytical summary of groundwater sampling, round 4, conducted May 29 and 30, 2007 CHEMICAL/SAMPLE INFORMATION ANALYTICAL METHOD UNIT Coordinates pH SAIC GROUNDWATER BASED ON CSL SCREENING LEVELS BASED ON SQS PGG-5 PGG-6 PGG-7 N: 208967.95 E: 1267349.68 N: 208572.89 E: 1267423.01 N: 208171.87 E: 1267534.03 na na 6.14 6.13 6.00 na na Temp °C 12.94 13.33 14.15 na na Dissolved Oxygen mg/L 1.73 1.22 1.13 na na Electrical Conductivity mS/cm 2.352 0.7 0.318 na na Oxidation Reduction Potential mV -151.9 -52.2 -77.6 na na na na Petroleum Hydrocarbons Gasoline Range NWTPH-Gx/8021B µg/L 50.0 U 50.0 U 50.0 U na na Benzene NWTPH-Gx/8021B µg/L 0.500 U 0.500 U 0.500 U na na Toluene NWTPH-Gx/8021B µg/L 0.500 U 0.500 U 0.500 U na na Ethylbenzene NWTPH-Gx/8021B µg/L 0.500 U 0.500 U 0.500 U na na Xylenes (total) NWTPH-Gx/8021B µg/L 1.000 U 1.000 U 1.000 U na na Diesel Range NWTPH-Dx mg/L 0.236 U 0.236 U 0.236 U na na Lube Oil Range NWTPH-Dx mg/L 0.472 U 0.472 U 0.472 U na na na na Total Metals Arsenic EPA 6020 mg/L 0.00164 0.0012 0.0015 0.37 0.227 Cadmium EPA 6020 mg/L 0.001 U 0.001 U 0.001 U 0.0034 0.0026 Chromium EPA 6020 mg/L 0.012 0.001 U 0.001 U 0.318 0.306 Copper EPA 6020 mg/L 0.00136 0.00122 0.001 U 0.123 0.123 Lead EPA 6020 mg/L 0.001 U 0.001 U 0.001 U 0.013 0.011 Nickel EPA 6020 mg/L 0.00119 0.00159 0.001 U na na Zinc EPA 6020 mg/L 0.01 U 0.01 U 0.01 U 0.076 0.033 - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 47 UNIT PGG-5 PGG-6 PGG-7 SAIC GROUNDWATER BASED ON CSL EPA 7470A mg/L 0.005 U 0.005 U 0.005 U 0.0074 0.0052 Arsenic EPA 6020-Diss mg/L 0.00161 0.00132 0.00107 0.37 0.227 Cadmium EPA 6020-Diss mg/L 0.001 U 0.001 U 0.001 U 0.0034 0.0026 Chromium EPA 6020-Diss mg/L 0.0118 0.00161 0.00138 0.318 0.306 Copper EPA 6020-Diss mg/L 0.001 U 0.001 U 0.001 U 0.123 0.123 Lead EPA 6020-Diss mg/L 0.001 U 0.001 U 0.001 U 0.013 0.011 Nickel EPA 6020-Diss mg/L 0.001 U 0.00136 0.001 U na na Zinc EPA 6020-Diss mg/L 0.01 U 0.01 U 0.01 U 0.076 0.033 Mercury EPA 7470A-Diss mg/L 0.005 U 0.005 U 0.005 U 0.0074 0.0052 Aroclor 1016 EPA 8082 Mod µg/L 0.100 U 0.100 U 0.100 U 2.4 0.44 Aroclor 1221 EPA 8082 Mod µg/L 0.100 U 0.100 U 0.100 U na na Aroclor 1232 EPA 8082 Mod µg/L 0.100 U 0.100 U 0.100 U na na Aroclor 1242 EPA 8082 Mod µg/L 0.100 U 0.100 U 0.100 U na na Aroclor 1248 EPA 8082 Mod µg/L 0.100 U 0.100 U 0.100 U 1.5 0.27 Aroclor 1254 EPA 8082 Mod µg/L 0.100 U 0.100 U 0.100 U 0.86 0.16 Aroclor 1260 EPA 8082 Mod µg/L 0.100 U 0.100 U 0.100 U 0.31 0.058 Aroclor 1262 EPA 8082 Mod µg/L 0.100 U 0.100 U 0.100 U na na Aroclor 1268 EPA 8082 Mod µg/L 0.100 U 0.100 U 0.100 U na na CHEMICAL/SAMPLE INFORMATION Mercury ANALYTICAL METHOD SCREENING LEVELS BASED ON SQS Dissolved Metals Polychlorinated Biphenyls Polynuclear Aromatic Compounds Acenaphthene EPA 8270C-HVI µg/L 0.472 U 0.0943 U 0.0943 U 9.3 2.6 Acenaphthylene EPA 8270C-HVI µg/L 0.472 U 0.0943 U 0.0943 U 11 11 Anthracene EPA 8270C-HVI µg/L 0.472 U 0.0943 U 0.0943 U 59 11 - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 48 CHEMICAL/SAMPLE INFORMATION ANALYTICAL METHOD UNIT PGG-5 PGG-6 PGG-7 SAIC GROUNDWATER BASED ON CSL SCREENING LEVELS BASED ON SQS Benzo(a)anthracene EPA 8270C-HVI µg/L 0.0472 U 0.00943 U 0.00943 U 0.63 0.26 Benzo(a)pyrene EPA 8270C-HVI µg/L 0.0472 U 0.00943 U 0.00943 U 0.27 0.13 Benzo(b)fluoranthene EPA 8270C-HVI µg/L 0.0472 U 0.00943 U 0.00943 U 0.56 0.29 Benzo(k)fluoranthene EPA 8270C-HVI µg/L 0.0472 U 0.00943 U 0.00943 U 0.57 0.29 Benzo(ghi)perylene EPA 8270C-HVI µg/L 0.472 U 0.0943 U 0.0943 U 0.029 0.012 Chrysene EPA 8270C-HVI µg/L 0.472 U 0.00943 U 0.00943 U 1.9 0.47 Dibenz(a,h)anthracene EPA 8270C-HVI µg/L 0.0472 U 0.00943 U 0.00943 U 0.013 0.0046 Fluoranthene EPA 8270C-HVI µg/L 0.472 U 0.0943 U 0.0943 U 17 2.3 Fluorene EPA 8270C-HVI µg/L 0.472 U 0.0943 U 0.0943 U 7 2 Indeno(1,2,3-cd)pyrene EPA 8270C-HVI µg/L 0.0472 U 0.00943 U 0.00943 U 0.033 0.013 1-Methylnaphthalene EPA 8270C-HVI µg/L 0.472 U 0.0943 0.0943 na na 2-Methylnaphthalene EPA 8270C-HVI µg/L 0.472 U 0.0943 U 0.0943 U 31 18 Naphthalene EPA 8270C-HVI µg/L 0.472 U 0.0943 U 0.0943 U 92 54 Phenanthrene EPA 8270C-HVI µg/L 0.472 U 0.0943 U 0.0943 U 23 4.8 Pyrene EPA 8270C-HVI µg/L 0.472 U 0.0943 U 0.0943 U 20 14 Source: (Pacific Groundwater Group 2007) Green highlight – concentration exceeds MTCA Method A for groundwater Yellow highlight – parameter detected CSL – cleanup screening level EPA – US Environmental Protection Agency J – parameter detected at the reported concentration; result qualifies as "estimated" due to unacceptable QA results HVI – high volume injected µg/L – micrograms per liter mg/L – milligrams per liter mS/cm – milliSiemens per centimeter MTCA – Model Toxics Control Act - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 49 mV – millivolts na – not applicable NWTPH-Dx – Northwest total petroleum hydrocarbons - diesel extractable NWTPH-Gx – Northwest total petroleum hydrocarbons - gasoline extractable PGG – Pacific Groundwater Group SAIC – Science Applications International Corporation SIM – Simultaneous Ion Monitoring SQS – sediment quality standard U – parameter not detected, associated # is the lab reporting limit - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 50 Table D-19. Historical groundwater sample results for PCBs conducted October 11, 1991 and January 18, 1992 DATE AROCLOR 1016 8080 (µg/L) C-1 10/11/1991 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U C-1 1/18/1992 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U C-2 10/11/1991 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U C-2 1/18/1992 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U C-3 10/11/1991 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U C-3 1/18/1992 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U C-4 10/11/1991 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U C-4 1/18/1992 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U C-5 10/11/1991 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U C-5 1/17/1992 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U C-6 10/11/1991 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U C-6 1/18/1992 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U MW-7 10/11/1991 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U MW-7 1/18/1992 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U MW-8 10/12/1991 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U MW-8 1/17/1992 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U MW-9 10/11/1991 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U MW-9 1/17/1992 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U MW-10 10/11/1991 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U MW-10 1/17/1992 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U MW-11 10/11/1991 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U MW-11 1/17/1992 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U MW-12 10/11/1991 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U SAMPLE ID - Port_ of Seattle AROCLOR 1221 8080 (µg/L) AROCLOR 1232 8080 (µg/L) AROCLOR 1242 8080 (µg/L) AROCLOR 1248 8080 (µg/L) AROCLOR 1254 8080 (µg/L) AROCLOR 1260 8080 (µg/L) Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 51 DATE AROCLOR 1016 8080 (µg/L) MW-12 1/18/1992 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U MW-13 10/11/1991 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U MW-13 1/17/1992 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U MW-14 10/11/1991 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U MW-14 1/18/1992 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U SAMPLE ID AROCLOR 1221 8080 (µg/L) AROCLOR 1232 8080 (µg/L) AROCLOR 1242 8080 (µg/L) AROCLOR 1248 8080 (µg/L) AROCLOR 1254 8080 (µg/L) AROCLOR 1260 8080 (µg/L) Source: (Pacific Groundwater Group 2006) Green highlight – concentration exceeds MTCA Method A Unrestricted and/or Industrial Cleanup Level (WAC-173-340) Yellow highlight – parameter detected Investigation: AGI (Applied Geotechnology, Inc.) µg/L – micrograms per liter MTCA Method A: 0.1 MW – monitoring well U – parameter not detected; associated # is laboratory detection limit PCB –Polychlorinated Biphenyls - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 52 Table D-20a. Historical groundwater sample results for PAHs conducted October 11 and 12, 1991: C-1 through C-6 ANALYTICAL METHOD C-1 (µG/L) C-2 (µG/L) C-3 (µG/L) C-4 (µG/L) C-5 (µG/L) C-6 (µG/L) Naphthalene 8310 1.6 U 1.6 U 1.6 U 1.6 U 3 1.6 U Acenaphthylene 8310 1.3 0.25 U 0.25 U 7.6 0.25 U 0.25 U Acenaphthene 8310 0.17 U 0.21 0.17 U 0.17 0.17 U 0.17 U Fluorene 8310 0.09 U 0.09 U 0.09 U 0.09 U 0.5 0.09 U Phenanthrene 8310 0.66 0.13 0.2 0.12 U 0.16 0.12 U Anthracene 8310 0.19 0.11 0.38 0.1 U 0.28 0.1 U Fluoranthene 8310 0.6 0.22 0.38 0.16 U 0.16 U 0.16 U Pyrene 8310 0.65 0.14 0.37 0.14 U 0.14 U 0.14 U Benzo(a)anthracene 8310 0.28 0.12 0.25 0.057 U 0.057 U 0.057 U Chrysene 8310 0.42 0.16 0.3 0.051 U 0.051 U 0.051 U Benzo(b)fluoranthene 8310 0.099 0.16 0.3 0.072 U 0.072 U 0.072 U Benzo(k)fluoranthene 8310 0.2 0.12 0.3 0.068 U 0.068 U 0.068 U Benzo(a)pyrene 8310 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U Dibenzo(a,h)anthracene 8310 0.27 0.21 0.12 0.084 U 0.084 U 0.084 U Benzo(g,h,i)perylene 8310 0.084 U 0.084 U 0.084 U 0.084 U 0.084 U 0.084 U Indeno(1,2,3-cd)pyrene 8310 0.096 U 0.096 U 0.096 U 0.096 U 0.096 U 0.096 U Toxicity Equivalent Concentrations TEF Benzo(a)anthracene 0.1 0.042 0.016 0.03 0.00255 0.00255 0.00255 Benzo(a)pyrene 1 0.099 0.16 0.3 0.036 0.036 0.036 Benzo(b)fluoranthene 0.1 0.02 0.012 0.03 0.0034 0.0034 0.0034 Benzo(k)fluoranthene 0.1 0.00075 0.00075 0.00075 0.00075 0.00075 0.00075 CHEMICAL/SAMPLE INFORMATION - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 53 ANALYTICAL METHOD C-1 (µG/L) C-2 (µG/L) C-3 (µG/L) C-4 (µG/L) C-5 (µG/L) C-6 (µG/L) Chrysene 0.01 0.0027 0.0021 0.0012 0.00042 0.00042 0.00042 Dibenzo(a,h)anthracene 0.4 0.0168 0.0168 0.0168 0.0168 0.0168 0.0168 Indeno(1,2,3-cd)pyrene 0.1 0.0048 0.0048 0.0048 0.0048 0.0048 0.0048 Total cPAH Toxicity Equivalent Concentrations (TEQ) 0.19 0.21 0.38 0.06 0.06 0.06 MTCA Method C Total cPAH Cleanup Level (µg/L): 0.12 0.12 0.12 0.12 0.12 0.12 CHEMICAL/SAMPLE INFORMATION Source: (Pacific Groundwater Group 2006) Green highlight – concentration exceeds MTCA Method C for groundwater Yellow highlight – parameter detected Investigation: AGI (Applied Geotechnology, Inc.) cPAH – carcinogenic Polycyclic Aromatic Hydrocarbon µg/L – micrograms per liter TEF – Toxicity Equivalency Factor TEQ – toxic equivalent U – parameter not detected; associated # is laboratory detection limit - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 54 Table D-20b. Historical groundwater sample results for PAHs conducted October 11 and 12, 1991: Sample locations MW-7 through MW-14 MTCA METHOD C INDIVIDUAL NONCHEMICAL/SAMPLE INFORMATION ANALYTICAL METHOD MW-7 (µg/L) MW-8 (µg/L) MW-9 (µg/L) MW-10 (µg/L) MW-11 (µg/L) MW-12 (µg/L) MW-13 (µg/L) MW-14 (µg/L) CARCINOGENIC CLEANUP LEVEL Naphthalene100 8310 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 1.6 U 350 Acenaphthylene 8310 0.25 U 0.25 U 0.25 U 0.25 U 0.25 U 0.25 U 0.25 U 0.25 U na Acenaphthene 8310 0.17 U 0.17 U 0.17 U 0.17 U 0.17 U 0.17 U 0.17 U 0.17 U 2100 Fluorene 8310 0.09 U 0.09 U 0.29 0.09 U 0.09 U 0.09 U 0.09 U 0.09 U 1400 Phenanthrene 8310 0.12 U 0.12 U 0.72 0.5 0.12 U 0.12 U 0.12 U 0.12 U na Anthracene 8310 0.1 U 0.1 U 0.26 0.45 0.1 U 0.1 U 0.1 U 0.1 U 5250 Fluoranthene 8310 0.16 U 0.16 U 0.21 0.95 0.16 U 0.16 U 0.16 U 0.16 U 1400 Pyrene 8310 0.14 U 0.14 U 0.15 0.81 0.14 U 0.14 U 0.14 U 0.14 U 1050 Benzo(a)anthracene 8310 0.057 U 0.057 U 0.057 U 0.21 0.057 U 0.057 U 0.057 U 0.057 U na Chrysene 8310 0.051 U 0.051 U 0.051 U 0.44 0.051 U 0.051 U 0.051 U 0.054 na Benzo(b)fluoranthene 8310 0.072 U 0.072 U 0.072 U 0.32 0.072 U 0.072 U 0.072 U 0.072 U na Benzo(k)fluoranthene 8310 0.068 U 0.068 U 0.068 U 0.3 0.068 U 0.068 U 0.068 U 0.068 U na Benzo(a)pyrene 8310 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U 0.015 U na Dibenzo(a,h)anthracene 8310 0.084 U 0.084 U 0.6 0.21 0.084 U 0.084 U 0.084 U 0.084 U na Benzo(g,h,i)perylene 8310 0.084 U 0.084 U 0.084 U 0.084 U 0.084 U 0.084 U 0.084 U 0.084 U na Indeno(1,2,3-cd)pyrene 8310 0.096 U 0.096 U 0.096 U 0.096 U 0.096 U 0.096 U 0.096 U 0.096 U na Toxicity Equivalent Concentrations TEF Benzo(a)anthracene 0.1 0.00255 0.00255 0.00255 0.044 0.00255 0.00255 0.00255 0.0054 na Benzo(a)pyrene 1 0.036 0.32 0.036 0.036 na - Port_ of Seattle 0.036 Terminal 108 Environmental Conditions Report 0.036 FINAL 0.036 0.036 Appendix D January 23, 2009 Page 55 MTCA METHOD C INDIVIDUAL NONCHEMICAL/SAMPLE INFORMATION ANALYTICAL METHOD MW-7 (µg/L) MW-8 (µg/L) MW-9 (µg/L) MW-10 (µg/L) MW-11 (µg/L) MW-12 (µg/L) MW-13 (µg/L) MW-14 (µg/L) CARCINOGENIC CLEANUP LEVEL Benzo(b)fluoranthene 0.1 0.0034 0.0034 0.0034 0.03 0.0034 0.0034 0.0034 0.0034 na Benzo(k)fluoranthene 0.1 0.00075 0.00075 0.00075 0.00075 0.00075 0.00075 0.00075 0.00075 na Chrysene 0.01 0.00042 0.00042 0.006 0.0021 0.00042 0.00042 0.00042 0.00042 na Dibenzo(a,h)anthracene 0.4 0.0168 0.0168 0.0168 0.0168 0.0168 0.0168 0.0168 0.0168 na Indeno(1,2,3-cd)pyrene 0.1 0.0048 0.0048 0.0048 0.0048 0.0048 0.0048 0.0048 0.0048 na Total cPAH Toxicity Equivalent Concentrations (TEQ) 0.06 0.06 0.07 0.42 0.06 0.06 0.06 0.07 na MTCA Method C Total cPAH Cleanup Level (µg/L): 0.12 0.12 0.12 0.12 0.12 0.12 0.12 0.12 na Source: (Pacific Groundwater Group 2006) Green highlight – concentration exceeds MTCA Method C for groundwater Yellow highlight – parameter detected Investigation: AGI (Applied Geotechnology, Inc.) cPAH – carcinogenic Polycyclic Aromatic Hydrocarbon µg/L – micrograms per liter MTCA – Model Toxics Control Act na – not applicable PAH – Polycyclic Aromatic Hydrocarbon TEF – Toxicity Equivalency Factor TEQ – toxic equivalent U – parameter not detected; associated # is laboratory detection limit - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 56 Table D-21a. Historical groundwater sample results for PAHs conducted January 17 and 18, 1992: Sample locations C-1 through C-6 CHEMICAL/SAMPLE INFORMATION ANALYTICAL METHOD C-1 (µg/L) C-2 ( µg/L) C-3 (µg/L) C-4 (µg/L) C-5 (µg/L) C-6 (µg/L) Naphthalene 8310 0.14 U 0.14 U 0.14 U 0.14 U 1.3 0.14 U Acenaphthylene 8310 0.069 U 0.069 U 0.069 U 0.069 U 0.069 U 0.069 U Acenaphthene 8310 0.02 U 0.02 U 0.16 0.02 U 0.02 U 0.02 U Fluorene 8310 0.013 U 0.013 U 0.026 0.013 U 0.22 0.013 U Phenanthrene 8310 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U 0.019 U Anthracene 8310 0.014 U 0.014 U 0.027 0.014 U 0.03 0.014 U Fluoranthene 8310 0.025 U 0.046 0.06 0.025 U 0.055 0.025 U Pyrene 8310 0.014 U 0.084 0.11 0.014 U 0.041 0.014 U Benzo(a)anthracene 8310 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U Chrysene 8310 0.011 U 0.016 0.035 0.011 U 0.011 U 0.011 U Benzo(b)fluoranthene 8310 0.012 U 0.02 0.02 0.012 U 0.012 U 0.012 U Benzo(k)fluoranthene 8310 0.013 U 0.038 0.013 U 0.013 U 0.013 U 0.013 U Benzo(a)pyrene 8310 0.011 U 0.015 0.011 U 0.011 U 0.011 U 0.011 U Dibenzo(a,h)anthracene 8310 0.013 U 0.013 U 0.023 0.013 U 0.013 U 0.013 U Benzo(g,h,i)perylene 8310 0.011 U 0.028 0.011 U 0.011 U 0.011 U 0.011 U Indeno(1,2,3-cd)pyrene 8310 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U Toxicity Equivalent Concentrations TEF Benzo(a)anthracene 0.1 0.00055 0.0016 0.0035 0.00055 0.00055 0.00055 Benzo(a)pyrene 1 0.006 0.02 0.02 0.006 0.006 0.006 Benzo(b)fluoranthene 0.1 0.00065 0.0038 0.00065 0.00065 0.00065 0.00065 Benzo(k)fluoranthene 0.1 0.00055 0.0015 0.00055 0.00055 0.00055 0.00055 - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 57 CHEMICAL/SAMPLE INFORMATION ANALYTICAL METHOD C-1 (µg/L) C-2 ( µg/L) C-3 (µg/L) C-4 (µg/L) C-5 (µg/L) C-6 (µg/L) Chrysene 0.01 0.000065 0.000065 0.00023 0.000065 0.000065 0.000065 Dibenzo(a,h)anthracene 0.4 0.0022 0.0112 0.0022 0.0022 0.0022 0.0022 Indeno(1,2,3-cd)pyrene 0.1 0.0006 0.0006 0.0006 0.0006 0.0006 0.0006 Total cPAH Toxicity Equivalent Concentrations 0.01 0.04 0.03 0.01 0.01 0.01 MTCA Method C Total cPAH Cleanup Level (µg/L): 0.12 0.12 0.12 0.12 0.12 0.12 Source: (Pacific Groundwater Group 2006) Green highlight – concentration exceeds MTCA Method C for groundwater Yellow highlight – parameter detected Investigation: AGI (Applied Geotechnology, Inc.) cPAH – carcinogenic Polycyclic Aromatic Hydrocarbon µg/L – micrograms per liter MTCA – Model Toxics Control Act na – not applicable PAH – Polycyclic Aromatic Hydrocarbon TEF – Toxicity Equivalency Factor U – parameter not detected; associated # is laboratory detection limit - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 58 Table D-21b. Historical groundwater sample results for PAHs conducted January 17 and 18, 1992: Sample locations MW-7 through MW-14 ANALYTICAL METHOD MW-7 (µG/L) MW-8 (µG/L) MW-9 (µG/L) MW-10 (µG/L) MW-11 (µG/L) MW-12 (µG/L) Naphthalene 8310 0.14 U 0.14 U 0.56 0.14 U 0.14 U 0.14 U 0.14 U 0.14 U 350 Acenaphthylene 8310 0.069 U 0.069 U 0.069 U 0.069 U 0.069 U 0.069 U 0.069 U 0.9 na Acenaphthene 8310 0.041 0.09 0.02 U 0.02 U 0.02 U 0.17 0.02 U 0.02 U 2100 Fluorene 8310 0.028 0.049 0.13 0.013 U 0.013 U 0.057 0.013 U 0.029 1400 Phenanthrene 8310 0.022 0.065 0.13 0.019 U 0.019 U 0.041 0.019 U 0.022 na Anthracene 8310 0.014 U 0.015 0.014 U 0.014 U 0.014 U 0.019 0.014 U 0.017 5250 Fluoranthene 8310 0.025 U 0.035 0.025 U 0.027 0.025 U 0.029 0.025 U 0.046 1400 Pyrene 8310 0.014 U 0.036 0.014 U 0.022 0.014 U 0.04 0.014 U 0.033 1050 Benzo(a)anthracene 8310 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.03 U 0.068 na Chrysene 8310 0.011 U 0.016 0.011 U 0.011 U 0.011 U 0.012 0.011 U 0.035 na Benzo(b)fluoranthene 8310 0.012 U 0.012 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.029 na Benzo(k)fluoranthene 8310 0.017 0.015 0.013 U 0.013 U 0.013 U 0.014 0.029 0.058 na Benzo(a)pyrene 8310 0.011 U 0.013 0.011 U 0.011 U 0.011 U 0.011 U 0.011 U 0.072 na Dibenzo(a,h)anthracene 8310 0.013 U 0.016 0.013 U 0.013 U 0.013 U 0.013 U 0.013 U 0.054 na Benzo(g,h,i)perylene 8310 0.011 U 0.011 U 0.011 U 0.011 U 0.011 U 0.011 U 0.011 U 0.084 na Indeno(1,2,3-cd)pyrene 8310 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.012 U 0.063 na Toxicity Equivalent Concentrations TEF Benzo(a)anthracene 0.1 0.00055 0.0016 0.00055 0.00055 0.00055 0.0012 0.00055 0.0035 na Benzo(a)pyrene 1 0.006 0.012 0.006 0.006 0.006 0.006 0.006 0.029 na Benzo(b)fluoranthene 0.1 0.0017 0.0015 0.00065 0.0015 0.00065 0.0014 0.0029 0.0058 na Benzo(k)fluoranthene 0.1 0.00055 0.0013 0.00055 0.00055 0.00055 0.00055 0.00055 0.0072 na CHEMICAL/SAMPLE INFORMATION - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 59 MW-13 (µG/L) MW-14 (µG/L) MTCA METHOD C INDIVIDUAL NONCARCINOGENIC CLEANUP LEVEL MTCA METHOD C INDIVIDUAL NON- ANALYTICAL METHOD MW-7 (µG/L) MW-8 (µG/L) MW-9 (µG/L) MW-10 (µG/L) MW-11 (µG/L) MW-12 (µG/L) MW-13 (µG/L) MW-14 (µG/L) Chrysene 0.01 0.000065 0.00016 0.000065 0.000065 0.000065 0.000065 0.000065 0.00054 na Dibenzo(a,h)anthracene 0.4 0.0022 0.0022 0.0022 0.0022 0.0022 0.0022 0.0022 0.0336 na Indeno(1,2,3-cd)pyrene 0.1 0.0006 0.0006 0.0006 0.0006 0.0006 0.0006 0.0006 0.0063 na Total cPAH Toxicity Equivalent Concentrations 0.01 0.02 0.01 0.01 0.01 0.01 0.01 0.01 MTCA Method C Total cPAH Cleanup Level (µg/L): 0.12 0.12 0.12 0.12 0.12 0.12 0.12 0.12 CHEMICAL/SAMPLE INFORMATION Source: (Pacific Groundwater Group 2006) Green highlight – concentration exceeds MTCA Method C for groundwater Yellow highlight – parameter detected Investigation: AGI (Applied Geotechnology, Inc.) cPAH – carcinogenic Polycyclic Aromatic Hydrocarbon µg/L – micrograms per liter MTCA – Model Toxics Control Act na – not applicable PAH – Polycyclic Aromatic Hydrocarbon TEF – Toxicity Equivalency Factor U – parameter not detected; associated # is laboratory detection limit - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 60 CARCINOGENIC CLEANUP LEVEL na na Table D-22. Historical groundwater sample results for TPHs conducted October 11, 1991 and January 18, 1992 SAMPLE ID DATE GASOLINE (µG/L) MINERAL SPIRITS (µg/L) KEROSENE (µg/L) JET FUEL (µg/L) DIESEL (µg/L) FUEL OIL #6 (µg/L) LUBRICATING OIL (µg/L) BENZENE (µg/L) ETHYL BENZENE (µg/L) TOLUENE (µg/L) TOTAL XYLENES (µg/L) C-1 10/11/1991 10 U 10 U 10 U 10 U 10 U 10 U 100 U 0.3 U 0.3 U 0.3 U 0.5 U C-2 10/11/1991 10 U 10 U 10 U 10 U 160 10 U 100 U 0.3 U 0.3 U 0.3 U 0.5 U C-3 10/11/1991 10 U 10 U 10 U 10 U 40 10 U 100 U 0.3 U 0.3 U 0.3 U 0.5 U C-4 10/11/1991 10 U 10 U 10 U 10 U 53 10 U 100 U 0.3 U 0.3 U 0.3 U 0.5 U C-5 10/11/1991 57 10 U 10 U 10 U 130 10 U 100 U 0.9 3 0.6 3 C-6 10/11/1991 10 U 10 U 10 U 10 U 10 U 10 U 100 U 0.3 U 0.3 U 0.3 U 0.5 U MW-7 10/11/1991 27 10 U 10 U 10 U 53 10 U 100 U 0.3 U 0.3 U 0.6 0.7 MW-8 10/11/1991 39 10 U 10 U 10 U 140 10 U 100 U 0.3 U 0.3 U 0.3 U 0.5 U MW-9 10/11/1991 10 U 10 U 10 U 10 U 490 10 U 100 U 0.5 3 0.6 3 10/11/1991 10 U 10 U 10 U 10 U 67 10 U 100 U 0.3 U 0.3 U 0.3 U 0.5 U 10/11/1991 10 U 10 U 10 U 10 U 39 10 U 100 U 0.3 U 0.3 U 0.3 U 0.5 U MW-11 10/11/1991 10 U 10 U 10 U 10 U 10 U 10 U 100 U 0.3 U 0.3 U 0.3 U 0.5 U MW-12 10/11/1991 10 U 10 U 10 U 10 U 150 10 U 100 U 0.3 U 0.3 U 0.9 0.5 U MW-13 10/11/1991 10 U 10 U 10 U 10 U 10 U 10 U 100 U 0.3 U 0.3 U 0.3 U 0.5 U 10/11/1991 10 U 10 U 10 U 10 U 10 U 10 U 100 U 0.3 U 0.3 U 0.3 U 0.5 U 10/11/1991 10 U 10 U 10 U 10 U 38 10 U 100 U 0.3 U 0.3 U 0.3 U 0.5 U C-1 1/18/1992 10 U 10 U 10 U 10 U 10 U 10 U 100 U 0.3 U 0.3 U 0.3 U 0.5 U C-2 1/18/1992 10 U 10 U 10 U 10 U 10 U 10 U 100 U 0.3 U 0.3 U 0.3 U 0.5 U C-3 1/18/1992 10 U 10 U 10 U 10 U 10 U 10 U 100 U 0.3 U 0.3 U 0.3 U 0.5 U C-4 1/18/1992 10 U 10 U 10 U 10 U 10 U 10 U 100 U 0.3 U 0.3 U 0.3 U 0.5 U 1/18/1992 120 10 U 10 U 10 U 530 10 U 100 U 0.6 0.4 0.9 1 1/18/1992 10 U 10 U 10 U 10 U 590 10 U 100 U 0.6 2 2 4 C-6 1/18/1992 10 U 10 U 10 U 10 U 10 U 10 U 100 U 0.3 U 0.3 U 0.3 U 0.5 U MW-7 1/18/1992 10 U 10 U 10 U 10 U 10 U 10 U 100 U 0.3 U 0.3 U 0.3 U 0.5 U MW-8 1/18/1992 10 U 10 U 10 U 10 U 150 10 U 100 U 0.3 U 0.3 U 0.3 U 0.5 U MW-10 MW-10 Dup a MW-14 MW-14 Dup b C-5 C-5 Dup c - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 61 SAMPLE ID DATE GASOLINE (µG/L) MINERAL SPIRITS (µg/L) KEROSENE (µg/L) JET FUEL (µg/L) DIESEL (µg/L) FUEL OIL #6 (µg/L) LUBRICATING OIL (µg/L) BENZENE (µg/L) ETHYL BENZENE (µg/L) TOLUENE (µg/L) TOTAL XYLENES (µg/L) MW-9 1/18/1992 40 10 U 10 U 10 U 10 U 10 U 100 U 0.3 U 1 0.7 2 MW-10 1/18/1992 10 U 10 U 10 U 10 U 10 U 10 U 100 U 0.3 U 0.3 U 0.3 U 0.5 U MW-11 1/18/1992 10 U 10 U 10 U 10 U 10 U 10 U 100 U 0.3 U 0.3 U 0.3 U 0.5 U MW-12 1/18/1992 10 U 10 U 10 U 10 U 10 U 10 U 100 U 0.3 U 0.3 U 0.3 U 0.5 U MW-13 1/18/1992 10 U 10 U 10 U 10 U 10 U 10 U 100 U 0.3 U 0.3 U 0.3 U 0.5 U MW-14 1/18/1992 10 U 10 U 10 U 10 U 230 10 U 100 U 0.3 U 0.3 U 0.3 U 0.5 U MTCA Method A Cleanup Level na na na na 500 500 na 5 700 1000 1000 MTCA Method C Cleanup Level 800 na na na na na na 7.95 1750 3500 35000 Source: (Pacific Groundwater Group 2006) a MW-10 Dup is sample MW-15; b MW-14 Dup is Sample MW-16 for October 1991 sampling round. c C-5 Dup is Sample MW-15 for January 1992 sampling round. Green highlight – concentration exceeds MTCA Method C Industrial Cleanup Level (WAC-173-340) Yellow highlight – parameter detected Investigation: AGI (Applied Geotechnology, Inc.) Dup – duplicate MTCA – Model Toxics Control Act TPH = Total Petroleum Hydrocarbons U – parameter not detected; associated # is laboratory detection limit - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 62 Table D-23. Historical groundwater sample results for metals conducted October 11, 1991 and January 17, 1992 CHEMICAL/ SAMPLE DATE INFORMATION ANALYTICAL METHOD Antimony 10/11/1991 6010/7000 Arsenic 10/11/1991 6010/7000 Beryllium 10/11/1991 6010/7000 Cadmium 10/11/1991 6010/7000 Chromium MTCA C-2 C-3 C-4 C-5 C-6 MW-7 MW-8 MW-9 MW-10 MW-11 MW-12 MW-13 MW-14 METHOD C-1 C (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) MW-14 (Dup) (µg/L) 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 20 U 20 U 20 U 20 U 20 U 20 U 20 U 20 U 20 U 20 U 20 U 20 U 20 U 20 U 20 U 17.5 20 U 20 U 20 U 28 20 U 20 U 20 U 20 U 20 U 20 U 20 U 20 U 20 U 20 U 20 U 10/11/1991 6010/7000 105 (CrVI) 26 65 20 U 20 U 53 38 20 U 20 U 20 U 84 20 U 20 U 20 U 35 39 Copper 10/11/1991 6010/7000 1300 42 100 41 20 U 45 84 20 U 20 U 54 130 20 U 22 30 77 75 Lead 10/11/1991 7240 50 U 130 94 50 U 50 U 50 U 50 U 50 U 50 U 91 50 U 50 U 50 U 50 U 260 Mercury 10/11/1991 6010/7000 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U Nickel 10/11/1991 6010/7000 50 U 50 U 50 U 59 50 U 50 U 50 U 50 U 50 U 55 50 U 50 U 50 U 52 50 U Selenium 10/11/1991 6010/7000 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U Silver 10/11/1991 6010/7000 50 U 50 U 50 U 50 U 50 U 50 U 50 U 50 U Thallium 10/11/1991 6010/7000 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U Zinc 10/11/1991 6010/7000 140 480 90 150 130 210 270 Antimony 1/17/1992 6010/7000 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U Arsenic 1/17/1992 6010/7000 5U 7 5U 5U 5U 5U 5U 5U 5U 5U 5U 5U 5U 5U 5U Beryllium 1/17/1992 6010/7000 20 U 20 U 20 U 20 U 20 U 20 U 20 U 20 U 20 U 20 U 20 U 20 U 20 U 20 U 20 U Cadmium 1/17/1992 6010/7000 17.5 0.25 U 0.47 0.25 U 7.5 0.43 0.25 U 38 0.25 U 5.7 3.4 0.27 1.6 0.93 1.5 0.25 U Chromium 1/17/1992 6010/7000 105 (CrVI) 20 U 50 20 U 20 U 20 U 20 U 20 U 20 U 20 U 20 U 20 U 20 U 20 U 20 U 20 U Copper 1/17/1992 6010/7000 1300 20 U 66 20 U 20 U 20 U 20 U 200 20 U 20 U 20 U 20 U 20 U 20 U 20 U 20 U Lead 1/17/1992 7240 17 67 6 18 5U 5 7 5U 5U 5U 5U 5U 5U 5U 5U Mercury 1/17/1992 6010/7000 0.2 U 0.3 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U - Port_ of Seattle 5.25 700 10500 5.25 50 U 230 Terminal 108 Environmental Conditions Report 50 U 120 50 U 1600 50 U 160 50 U 210 FINAL 50 U 91 50 U 50 U 86 Appendix D January 23, 2009 Page 63 CHEMICAL/ SAMPLE INFORMATION DATE ANALYTICAL METHOD Nickel 1/17/1992 6010/7000 Selenium 1/17/1992 6010/7000 Silver 1/17/1992 Thallium Zinc MTCA C-2 C-3 C-4 C-5 C-6 MW-7 MW-8 MW-9 MW-10 MW-11 MW-12 MW-13 MW-14 METHOD C-1 C (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) 700 98 50 U 110 50 U 50 U 50 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 6010/7000 50 U 50 U 50 U 50 U 50 U 50 U 50 U 50 U 1/17/1992 6010/7000 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 1/17/1992 6010/7000 50 U 430 50 U 490 89 140 50 U 10500 50 U 50 U 50 U 130 50 U 50 U 50 U 120 50 U 1200 50 U 50 U 50 U 50 U 50 U 50 U 380 50 U 6200 50 U 50 U 50 U 170 1300 Source: (Pacific Groundwater Group 2006) Green highlight – concentration exceeds MTCA Method C Industrial Cleanup Level (WAC-173-340) Yellow highlight – parameter detected Investigation: AGI (Applied Geotechnology, Inc.) – Data appears to be total metals analyses, although AGI (1992) report does not explicitly state that samples were not filtered. # U – parameter not detected; # is laboratory detection limit CrVI – chromium six Dup – duplicate MTCA – Model Toxics Control Act WAC – Washington Administrative Code - MW-14 (Dup) (µg/L) Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 64 Table D-24. Historical groundwater sample results for metals and PCBs conducted June 5, 1984 CHEMICAL/SAMPLE INFORMATION WELL 84-1 (DUPL) A WELL 84-2 WELL 84-2 (DUPL) A WELL A B – – – 1.0 0.05 0.018 0.01 0.0018 0.0012 – 0.001 0.053 0.066 0.057 0.022 0.01 mg/L 0.048 0.045 0.15 0.016 0.005 Mercury mg/L – – 0.002 – 0.002 Zinc mg/L 0.22 0.27 0.28 0.14 Total Dissolved Solids mg/L 750 780 1400 11000 UNITS WELL 84-1 PCB µg/L – Arsenic mg/L 0.073 0.073 Cadmium mg/L 0.0015 Chromium mg/L Lead DETECTION LIMIT Source: (Dames & Moore 1984; Pacific Groundwater Group 2006) a Duplicate samples were tested for quality control check. 84-1 duplicate tested for metals only, 84-2 duplicated tested for PCB only. b Detection limit for water sample from Well A is 10 ppb – concentration is less than detection limit Blank – no test was performed Dupl – duplicate - Port_ of SeanIe Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 65 Table D-25. Historical seep sample results for metals and PCBs conducted June 5, 1984 CHEMICAL/SAMPLE INFORMATION DETECTION UNITS SEEP N SEEP S LIMIT PCB µg/L – – 1.0 Arsenic mg/L – – 0.01 Cadmium mg/L 0.0012 <0.001 0.001 Chromium mg/L – – 0.01 Lead mg/L 0.006 – 0.005 Mercury mg/L – – 0.002 Zinc mg/L 0.1 0.035 Total Dissolved Solids mg/L 6400 7300 Source: (Dames & Moore 1984; Pacific Groundwater Group 2006) – concentration is less than detection limit Blank – no test was performed Dupl – duplicate - Port_ of SeanIe Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 66 REFERENCES Anchor. 2007. Duwamish/Diagonal sediment remediation project 2005 monitoring report: Elliott Bay/Duwamish restoration program panel. Panel publication 40. Prepared for King County Department of Natural Resources and Parks Elliot Bay/Duwamish restoration program. Anchor Environmental, L.L.C., Seattle, WA. Dames & Moore. 1984. Progress report, consultation, soil and water test results, Duwamish Waterway property, Seattle, Washington, for Chiyoda International Corporation. June 25, 1984. Dames & Moore, Seattle, WA. Pacific Environmental Group. 1991. Letter dated January 3, 1991 to S. Bruce, Chevron USA, Inc., from E. Larsen and W. Crell, PEG, regarding soil landfarming at Chevron Site 4097. Pacific Environmental Group, Inc., Redmond, WA. Pacific Groundwater Group. 2006. T-108 interim groundwater and shoreline soil investigation final work plan. Prepared for Port of Seattle. Pacific Groundwater Group, Seattle, WA. Pacific Groundwater Group. 2007. Port of Seattle T-108 groundwater investigation final report. Pacific Groundwater Group, Seattle, WA. Thorne Environmental. 1990. Quantitative chemistry results for soils stockpiled at the Chevron U.S.A. Inc. Chiyoda site, Seattle, Washington. Prepared for Chevron U.S.A. Inc. Thorne Environmental, Inc. - Port_ of SeanIe Terminal 108 Environmental Conditions Report FINAL Appendix D January 23, 2009 Page 67 Appendix E Adjacent Property Analytical Information Table E-1. 1985 S Nevada St storm drain sediment solid sample results 1 Table E-2. Summary of PAH compounds in S Oregon St soil samples 2 Table E-3. Summary of PCBs Results in S Oregon St soil samples 4 Table E-4. Summary of petroleum hydrocarbon compounds in S Oregon St soil samples 5 Table E-5. Summary of metals in S Oregon St soil samples 6 Table E-6. Summary of PAH compounds in Oregon Street intertidal sediment samples 7 Table E-7. Summary of PCBs in S Oregon St intertidal sediment samples 9 Table E-8. Summary of petroleum hydrocarbon compounds in S Oregon St intertidal sediment samples 10 Table E-9. Summary of metals in S Oregon St intertidal sediment samples 11 Table E-10. Summary of PAH compounds in S Oregon St groundwater samples 12 Table E-11. Summary of PCBs in S Oregon St groundwater samples 13 Table E-12. Summary of petroleum hydrocarbon compounds and metals in S Oregon St 14 Summary of Duwamish/Diagonal CSO/SD source-tracing sediment data (metals and TPH) 15 Summary of Duwamish/Diagonal CSO/SD source-tracing sediment data (Phthalates, PCBs, and PAHs) 16 Detection frequencies and concentration ranges for pollutants in Duwamish/Diagonal CSO/SD stormwater, 1995 17 Storm drain sediment samples in Duwamish/ Diagonal CSO/SD system, 1985 18 Storm drain sediments in Duwamish/Diagonal SD, 1985 19 Table E-13. Table E-14. Table E-15. Table E-16. Table E-17. REFERENCES - Port_ of SeanIe 19 Terminal 108 Environmental Conditions Report FINAL Appendix E January 23, 2009 Page i - Port_ of SeanIe Terminal 108 Environmental Conditions Report FINAL Appendix E January 23, 2009 Page ii Table E-1. 1985 S Nevada St storm drain sediment solid sample results MEASURED CONCENTRATION SQS CSL Cadmium 12.3 5.1 6.7 Chromium 1,790E 260 270 Lead 1,330 450 530 Zinc 654E 410 960 CHEMICAL (mg/kg) Source: Ecology (2004) CSL – cleanup screening level E – estimated value mg/kg – milligram per kilogram SQS – sediment quality standard - Port_ of SeanIe Terminal 108 Environmental Conditions Report FINAL Appendix E January 23, 2009 Page 1 Table E-2. Summary of PAH compounds in S Oregon St soil samples SAMPLE IDENTIFICATIONS UNIT CARC/ NON CARC B06-1-1 B06-2-5 B06-2-7.5 B06-3-2.5 B06-3-5 B06-3-7.5 B06-4-1 B06-4-10 B06-4-12.5 B06-5-2.5 B06-5-5 mg/kg nc 0.0075 U 0.0088 U 24 4.2 0.0087 0.0083 U 0.019 0.0081 U 0.0072 U 0.092 0.0077 U 2-Methylnaphthalene mg/kg nc 0.0075 U 0.0088 U 35 4.8 0.010 0.0083 U 0.026 0.0081 U 0.0072 U 0.13 0.0077 U Acenaphthene mg/kg nc 0.021 0.0088 U 39 0.15 0.0098 0.0083 U 0.0075 0.0081 U 0.0072 U 0.015 0.0077 U Acenaphthylene mg/kg nc 0.0075 U 0.0088 U 0.93 0.045 0.0081 U 0.0083 U 0.017 0.0081 U 0.0072 U 0.0092 0.12 Anthracene mg/kg nc 0.031 0.0088 U 60 0.022 0.022 0.019 0.015 0.0081 U 0.0072 U 0.014 0.052 Benzo(g,h,i)perylene mg/kg nc 0.062 0.024 51 0.057 0.089 0.13 0.046 0.0081 U 0.0072 U 0.086 0.24 Fluoranthene mg/kg nc 0.16 0.049 210 0.12 0.14 0.25 0.11 0.0081 U 0.0072 U 0.13 0.22 a 1-Methylnaphthalene PAH COMPOUND Fluorene mg/kg nc 0.015 0.0088 U 40 0.17 0.0090 0.0083 U 0.0092 0.0081 U 0.0072 U 0.013 0.011 b mg/kg nc 0.0075 U 0.0088 U 72 0.97 0.012 0.012 0.027 0.0081 U 0.0072 U 0.025 0.0077 U Phenanthrene mg/kg nc 0.11 0.027 260 0.22 0.11 0.045 0.086 0.0081 U 0.0072 U 0.31 0.038 Pyrene mg/kg nc 0.16 0.058 220 0.12 0.17 0.40 0.16 0.0083 0.0087 0.17 0.32 Benzo(a)anthracene mg/kg c 0.080 0.023 80 0.064 0.077 0.23 0.068 0.0081 U 0.0072 U 0.086 0.32 Benzo(a)pyrene mg/kg c 0.089 0.030 83 0.066 0.12 0.29 0.053 0.0081 U 0.0072 U 0.075 U 0.39 Benzo(b)fluoranthene mg/kg c 0.11 0.035 80 0.090 0.12 0.25 0.077 0.0081 U 0.0072 U 0.13 0.46 Benzo(k)fluoranthene mg/kg c 0.039 0.012 25 0.019 0.042 0.081 0.023 0.0081 U 0.0072 U 0.075 U 0.15 Chrysene mg/kg c 0.13 0.038 110 0.20 0.13 0.31 0.14 0.0081 U 0.0072 U 0.40 0.51 Dibenz(a,h)anthracene mg/kg c 0.023 0.0088 U 12 0.023 0.024 0.039 0.017 0.0081 U 0.0072 U 0.075 U 0.089 Indeno(1,2,3-c,d)pyrene mg/kg c 0.059 0.019 43 0.039 0.076 0.11 0.035 0.0081 U 0.0072 U 0.075 U 0.22 Naphthalene Toxicity Equivalency Evaluation Benzo(a)anthracene TEF 0.1 0.008 0.002 8 0.006 0.008 0.02 0.007 0 0 0.009 0.03 Benzo(a)pyrene TEF 1 0.089 0.030 83 0.066 0.12 0.29 0.053 0 0 0 0.39 Benzo(b)fluoranthene TEF 0.1 0.01 0.004 8 0.009 0.01 0.03 0.008 0 0 0.01 0.05 Benzo(k)fluoranthene TEF 0.1 0.004 0.001 2.5 0.002 0.004 0.008 0.002 0 0 0 0.02 - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix E January 23, 2009 Page 2 SAMPLE IDENTIFICATIONS UNIT CARC/ NON CARC B06-1-1 B06-2-5 B06-2-7.5 B06-3-2.5 B06-3-5 B06-3-7.5 B06-4-1 B06-4-10 B06-4-12.5 B06-5-2.5 B06-5-5 Chrysene TEF 0.01 0.001 0.000 1.1 0.002 0.001 0.003 0.001 0 0 0.004 0.01 Dibenz(a,h)anthracene TEF 0.4 0.009 0 4.8 0.009 0.010 0.016 0.007 0 0 0 0.036 Indeno(1,2,3-c,d)pyrene TEF 0.1 0.006 0.002 4.3 0.004 0.008 0.01 0.004 0 0 0 0.02 SUM 0.13 0.039 111.7 0.10 0.16 0.38 0.08 0 0 0.03 0.55 MTCA Method A Soil (Industrial) 2 2 2 2 2 2 2 2 2 2 2 PAH COMPOUND a Source: (Pacific Groundwater Group 2007) a Analytical method: EPA 8270C/SIM b Naphthalenes cleanup levels for MTCA Method A Soil (Unrestricted) and (Industrial) are 5 mg/kg Green highlight – sum of toxic equivalents exceeds MTCA Method A Soil (Industrial) # U – parameter not detected; # – laboratory practical quantitation limit C – carcinogen EPA – US Environmental Protection Agency mg/kg – milligram per kilogram MTCA – Model Toxics Control Act NC – non-carcinogen PAH – Polycyclic Aromatic Hydrocarbon ppm – parts per million SIM – Simultaneous Ion Monitoring TEF – toxic equivalency factor - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix E January 23, 2009 Page 3 Table E-3. SAMPLE LOCATION B06-1 B06-2 B06-3 B06-4 B06-5 Summary of PCBs Results in S Oregon St soil samples SAMPLE (MG/KG) AROCLOR 1016 AROCLOR 1221 AROCLOR 1232 AROCLOR 1242 AROCLOR 1248 AROCLOR 1254 AROCLOR 1260 AROCLOR 1262 TOTAL PCBS B06-1-1 0.056 U 0.056 U 0.056 U 0.056 U 0.056 U 0.28 0.20 0.056 U 0.056 U 0.48 B06-1-5 0.061 U 0.061 U 0.061 U 0.061 U 0.061 U 0.061 U 0.061 U 0.061 U 0.061 U ND B06-1-12.5 0.060 U 0.060 U 0.060 U 0.060 U 0.060 U 0.060 U 0.060 U 0.060 U 0.060 U ND B06-1-20 0.068 U 0.068 U 0.068 U 0.068 U 0.068 U 0.068 U 0.068 U 0.068 U 0.068 U ND B06-2-5 0.066 U 0.066 U 0.066 U 0.12 0.066 U 0.37 0.30 0.066 U 0.066 U 0.79 B06-2-7.5 0.057 U 0.057 U 0.057 U 0.057 U 0.057 U 0.057 U 0.057 U 0.057 U 0.057 U ND B06-2-10 0.058 U 0.058 U 0.058 U 0.058 U 0.058 U 0.058 U 0.058 U 0.058 U 0.058 U ND B06-2-12.5 0.060 U 0.060 U 0.060 U 0.060 U 0.060 U 0.060 U 0.060 U 0.060 U 0.060 U ND B06-3-1 0.057 U 0.057 U 0.057 U 0.057 U 0.057 U 0.28 0.13 0.057 U 0.057 U 0.41 B06-3-2.5 0.054 U 0.054 U 0.054 U 0.054 U 0.054 U 0.054 U 0.054 U 0.054 U 0.054 U ND B06-3-5 0.061 U 0.061 U 0.061 U 0.061 U 0.061 U 0.061 U 0.061 U 0.061 U 0.061 U ND B06-3-7.5 0.063 U 0.063 U 0.063 U 0.063 U 0.063 U 0.063 U 0.063 U 0.063 U 0.063 U ND BO6-4-1 0.055 U 0.055 U 0.055 U 0.055 U 0.055 U 0.055 U 0.055 U 0.055 U 0.055 U ND B06-4-2.5 0.054 U 0.054 U 0.054 U 0.054 U 0.054 U 0.26 0.054 U 0.054 U 0.054 U 0.26 B06-4-10 0.061 U 0.061 U 0.061 U 0.061 U 0.061 U 0.061 U 0.061 U 0.061 U 0.061 U ND B06-4-12.5 0.054 U 0.054 U 0.054 U 0.054 U 0.054 U 0.075 0.054 U 0.054 U 0.054 U 0.075 B06-5-1 0.057 U 0.057 U 0.057 U 0.20 0.057 U 0.74 0.31 0.057 U 0.057 U 1.25 B06-5-2 0.056 U 0.056 U 0.056 U 0.056 U 0.056 U 0.056 U 0.50 0.056 U 0.056 U 0.50 B06-5-5 0.057 U 0.057 U 0.057 U 0.057 U 0.057 U 0.057 U 0.057 U 0.057 U 0.057 U ND B06-5-15 0.061 U 0.061 U 0.061 U 0.061 U 0.061 U 0.061 U 0.061 U 0.061 U 0.061 U ND MTCA Method A Soil (Industrial) Source: (Pacific Groundwater Group 2007) Green highlight – sum of PCBs exceeds MTCA Method A Soil (Industrial) Analytical method: EPA 8082 - AROCLOR 1268 Port_ of Seattle Terminal 108 Environmental Conditions Report 10 EPA – US Environmental Protection Agency mg/kg – milligram per kilogram MTCA – Model Toxics Control Act ND – non detect FINAL PAH – polycyclic aromatic hydrocarbon PQL – practical quantitation limit TEF – toxic equivalency factor U – parameter not detected; laboratory practical quantitation limit Appendix E January 23, 2009 Page 4 Table E-4. SAMPLE LOCATION B06-1 B06-2 B06-3 B06-4 B06-5 Summary of petroleum hydrocarbon compounds in S Oregon St soil samples NWTPH-GX/BTEX SAMPLE IDENTIFICATION (mg/kg) BENZENE B06-1-1 NWTPH-DX TOLUENE ETHYL BENZENE M,PXYLENE OXYLENE TPHGAS DIESEL RANGE LUBE OIL 0.020 U 0.044 U 0.044 U 0.044 U 0.044 U 4.4 U 28 U 760 B06-1-5 — — — — — — 150 U 4900 B06-1-12.5 — — — — — — 30 U 170 B06-1-20 — — — — — — 34 U 100 B06-2-5 0.020 U 0.063 U 0.063 U 0.063 U 0.063 U 6.3 U 62 580 B06-2-7.5 0.020 U 0.055 U 0.055 U 0.055 U 0.055 U 5.5 U 310 580 B06-2-10 0.020 U 0.044 U 0.044 U 0.044 U 0.044 U 4.4 U 29 U 100 B06-2-12.5 — — — — — — 30 U 60 U B06-3-1 0.020 U 0.048 U 0.048 U 0.048 U 0.048 U 4.8 U 28 U 170 BO6-3-2.5 0.020 U 0.045 U 0.045 U 0.045 U 0.045 U 4.5 U 4500 5400 B06-3-5 0.020 U 0.054 U 0.054 U 0.054 U 0.054 U 5.4 U 31 U 160 B06-3-7.5 0.020 U 0.047 U 0.047 U 0.047 U 0.047 U 4.7 U 31 U 90 B06-4-1 0.020 U 0.050 U 0.050 U 0.050 U 0.050 U 5.0 U 28 U 190 B06-4-2.5 0.020 U 0.099 U 0.099 U 0.099 U 0.099 U 9.9 U 27 U 95 B06-4-10 0.020 U 0.053 U 0.053 U 0.053 U 0.053 U 5.3 U 170 630 B06-4-12.5 0.020 U 0.042 U 0.042 U 0.042 U 0.042 U 4.2 U 27 U 100 B06-5-1 0.020 U 0.050 U 0.050 U 0.050 U 0.050 U 5.0 U 200 610 B06-5-2.5 0.020 U 0.049 U 0.049 U 0.049 U 0.049 U 4.9 U 28 U 500 B06-5-5 0.020 U 0.044 U 0.044 U 0.044 U 0.044 U 4.4 U 29 U 87 B06-5-15 0.020 U 0.053 U 0.053 U 0.053 U 0.053 U 5.3 U 31 U 61 U 0.03 7 6 9 9 100 2000 2000 MTCA Method A Soil (Industrial) Source: (Pacific Groundwater Group 2007) Green highlight – sum of PCBs exceeds MTCA Method A Soil (Industrial) # U – parameter not detected; # – laboratory practical quantitation limit mg/kg – milligram per kilogram MTCA – Model Toxics Control Act NWTPH-Dx – Northwest total petroleum hydrocarbons - diesel extractable NWTPH-Gx – Northwest total petroleum hydrocarbons - gasoline extractable TPH – total petroleum hydrocarbons - Port_ of SeanIe Terminal 108 Environmental Conditions Report FINAL Appendix E January 23, 2009 Page 5 Table E-5. SAMPLE LOCATION B06-1 B06-2 B06-3 B06-4 B06-5 Summary of metals in S Oregon St soil samples SAMPLE IDENTIFICATION ARSENIC (mg/kg) CADMIUM (mg/kg) COPPER (mg/kg) LEAD (mg/kg) NICKEL (mg/kg) ZINC (mg/kg) B06-1-1 11 U 0.63 27 24 13 49 B06-1-5 12 U 0.61 U 52 91 18 65 B06-1-12.5 12 U 0.60 U 13 6.0 U 8.6 24 B06-1-20 14 U 0.68 U 23 6.8 U 9.0 29 B06-2-5 13 U 0.66 U 19 6.6 U 4.4 20 B06-2-7.5 11 U 1.5 100 160 26 180 B06-2-10 12 U 0.58 U 22 13 10 30 B06-2-12.5 12 U 0.60 U 15 8.4 15 38 B06-3-1 11 U 1.9 25 25 11 120 B06-3-2.5 11 U 0.54 U 28 5.9 17 36 B06-3-5 12 U 1.4 110 180 29 310 B06-3-7.5 13 U 0.95 16 10 9.2 30 B06-4-1 11 U 0.82 64 46 33 2800 B06-4-2.5 11 U 0.54 U 35 33 11 60 B06-4-10 12 U 0.61 U 21 6.1 U 13 68 B06-4-12.5 11 U 0.54 U 12 5.4 U 7.5 26 B06-5-1 11 U 0.90 40 36 12 74 B06-5-2.5 11 U 0.56 U 36 33 30 110 B06-5-5 11 U 0.57 U 26 34 11 35 B06-5-15 12 U 0.61 U 10 6.1 U 9.1 19 20 2 MTCA Method A Soil (Industrial) 1000 Source: (Pacific Groundwater Group 2007) Green highlight – concentration exceeds MTCA Method A Soil (Industrial) mg/kg – milligram per kilogram MTCA – Model Toxics Control Act U – parameter not detected; # – laboratory practical quantitation limit - Port_ of SeanIe Terminal 108 Environmental Conditions Report FINAL Appendix E January 23, 2009 Page 6 Table E-6. Summary of PAH compounds in Oregon Street intertidal sediment samples PAH CONCENTRATIONS - DRY WEIGHT (mg/kg) PAH CONCENTRATIONS – TOC-NORMALIZED (mg/kg-OC) PAH COMPOUND IT-1-6 IT-2-6 IT-2-16 IT-3-6 IT-3-12 IT-1-6 IT-2-6 IT-2-16 IT-3-6 IT-3-12 1-Methylnaphthalene 0.0083 U 0.0063 U 0.081 0.0087 U 0.0088 U — — 3 — — SQS 2-Methylnaphthalene 0.0083 U 0.0063 U 0.13 0.0087 U 0.0088 U — — 5 — — 38 Acenaphthene 0.0083 U 0.0063 U 0.046 0.0087 U 0.0088 U — — 2 — — 16 Acenaphthylene 0.0083 U 0.0063 U 0.0078 U 0.0087 U 0.0088 U — — — — — 66 Anthracene 0.0083 U 0.0063 U 0.0078 U 0.0098 0.023 — — — 0 1 220 0.019 0.0063 U 0.0078 U 0.042 0.081 2 — — 2 3 31 Benzo(g,h,i)perylene Fluoranthene 0.020 0.0063 U 0.0078 U 0.069 0.14 2 — — 3 6 160 Fluorene 0.0083 U 0.0063 U 0.0098 0.0087 U 0.010 — — 0 — 0 23 Naphthalene 0.0083 U 0.0063 U 0.22 0.0087 U 0.0088 U — — 9 — — 99 Phenanthrene 0.0083 U 0.0063 U 0.0078 U 0.036 0.10 — — — 1 4 100 0.021 0.0063 U 0.0078 U 0.083 0.16 2 — — 3 6 1000 Benzo(a)anthracene 0.014 0.0063 U 0.0078 U 0.050 0.078 1 — — 2 3 110 Benzo(a)pyrene 0.022 0.0063 U 0.0078 U 0.051 0.095 2 — — 2 4 99 Benzo(b)fluoranthene 0.032 0.0063 U 0.0078 U 0.068 0.11 3 — — 3 4 230 (total) Benzo(k)fluoranthene 0.012 0.0063 U 0.0078 U 0.023 0.041 1 — — 1 2 Pyrene Chrysene 0.031 0.0063 U 0.0078 U 0.071 0.12 3 — — 3 5 110 Dibenz(a,h)anthracene 0.0083 U 0.0063 U 0.0078 U 0.013 0.026 — — — 1 1 12 Indeno(1,2,3-c,d)pyrene 0.016 0.0063 U 0.0078 U 0.036 0.068 1 — — 1 3 34 1.15 0.47 2.47 2.47 2.47 Estimated total organic content from PGG-5 and PGG-6 a analytical results and grain size (%) Source: (Pacific Groundwater Group 2007) a Intertidal sediment samples not analyzed for TOC. Soil samples from boreholes PGG-5 (200 feet southeast of intertidal samples) and PGG-6 (500 feet southeast of intertidal samples) analyzed for TOC. Estimated TOC for IT samples from PGG-5 and PGG-6 results based on comparable soil/sediment description. Green highlight – exceeds SQS Analytical method: EPA 8270C/SIM EPA – US Environmental Protection Agency - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix E January 23, 2009 Page 7 mg/kg-OC – mg/kg organic carbon (total organic carbon normalized) mg/kg – milligram per kilogram PAH –Polycyclic Aromatic Hydrocarbon PGG – Pacific Groundwater Group SIM – Simultaneous Ion Monitoring SQS – Sediment Quality Standards (WAC 173-204-320) TOC – total organic carbon U – parameter not detected; # – laboratory practical quantitation limit WAC – Washington Administrative Code — not calculated, PAH not detected Sample descriptions: IT-1-6: Brown silt with roots and organic material IT-1-12: Brown silt with organic material IT-2-6: Wet, gray, sand and gravel IT-2-16: Dark gray, wet, slightly sandy, organic smelling silt IT-3-6: Brown, sandy silt with trace gravel IT-3-12: Dark gray, moist, slightly sandy silt. - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix E January 23, 2009 Page 8 Table E-7. Summary of PCBs in S Oregon St intertidal sediment samples CHEMICAL (mg/kg) IT-1-6 IT-1-12 IT-2-6 IT-2-16 IT-3-6 IT-3-12 Aroclor 1016 0.063 U 0.066 U 0.052 U 0.058 U 0.065 U 0.066 U Aroclor 1221 0.063 U 0.066 U 0.052 U 0.058 U 0.065 U 0.066 U Aroclor 1232 0.063 U 0.066 U 0.052 U 0.058 U 0.065 U 0.066 U Aroclor 1242 0.063 U 0.066 U 0.052 U 0.058 U 0.065 U 0.066 U Aroclor 1248 0.063 U 0.066 U 0.052 U 0.058 U 0.065 U 0.066 U Aroclor 1254 0.063 U 0.066 U 0.052 U 0.058 U 0.065 U 0.066 U Aroclor 1260 0.063 U 0.066 U 0.052 U 0.058 U 0.065 U 0.066 U Aroclor 1262 0.063 U 0.066 U 0.052 U 0.058 U 0.065 U 0.066 U Aroclor 1268 0.063 U 0.066 U 0.052 U 0.058 U 0.065 U 0.066 U Total PCBs ND ND ND ND ND ND Source: (Pacific Groundwater Group 2007) Analytical method: EPA 8082 EPA – US Environmental Protection Agency mg/kg – milligram per kilogram ND – non detect PCB - polychlorinated biphenyl U – parameter not detected; # – laboratory practical quantitation limit - Port_ of SeanIe Terminal 108 Environmental Conditions Report FINAL Appendix E January 23, 2009 Page 9 Table E-8. Summary of petroleum hydrocarbon compounds in S Oregon St intertidal sediment samples NWTPH-GX/BTEX SAMPLE LOCATION Intertidal SAMPLE (mg/kg) BENZENE IT-1-6 IT-1-12 IT-2-6 NWTPH-DX TOLUENE ETHYL BENZENE M,PXYLENE OXYLENE TPHGAS DIESEL RANGE LUBE OIL — — — — — — 31 U 63 U — — — — — — 33 U 66 U — — — — — — 26 U 52 U — a 40 110 IT-2-16 — — — — — IT-3-6 — — — — — — 33 U 170 IT-3-12 — — — — — — 38 150 SQS not established under WAC 173-204 for diesel or lube oil Source: (Pacific Groundwater Group 2007) a Identified diesel fuel #2 by lab – parameter not analyzed NWTPH-Dx – Northwest total petroleum hydrocarbons - diesel extractable NWTPH-Gx – Northwest total petroleum hydrocarbons - gasoline extractable SQS – Sediment Quality Standards (WAC 173-204-320) TPH – total petroleum hydrocarbons U – parameter not detected; # – laboratory practical quantitation limit WAC – Washington Administrative Code - Port_ of SeanIe Terminal 108 Environmental Conditions Report FINAL Appendix E January 23, 2009 Page 10 Table E-9. SAMPLE LOCATION Intertidal SQS Summary of metals in S Oregon St intertidal sediment samples SAMPLE (mg/kg) ARSENIC CADMIUM COPPER LEAD NICKEL ZINC IT-1-6 13 U 0.63 U 29 53 14 48 IT-1-12 13 U 0.66 U 13 6.6 U 4.7 12 IT-2-6 10 U 0.52 U 120 5.2 U 22 77 IT-2-16 12 U 0.58 U 55 100 18 95 IT-3-6 13 U 0.65 U 84 190 22 150 IT-3-12 13 U 0.66 U 110 330 29 180 57 5.1 390 450 na 410 Source: (Pacific Groundwater Group 2007) na – not applicable SQS – Sediment Quality Standards (WAC 173-204-320) U – parameter not detected; # – laboratory practical quantitation limit WAC – Washington Administrative Code - Port_ of SeanIe Terminal 108 Environmental Conditions Report FINAL Appendix E January 23, 2009 Page 11 Table E-10. Summary of PAH compounds in S Oregon St groundwater samples UNIT CARC./NON CARC. B06-2 B06-5 1-Methylnaphthalene µg/L nc 0.18 0.095 U 2-Methylnaphthalene µg/L nc 0.27 0.095 U Acenaphthene µg/L nc 0.18 0.095 U Acenaphthylene µg/L nc 0.097 U 0.095 U Anthracene µg/L nc 0.12 0.095 U PAH COMPOUND Benzo(g,h,i)perylene µg/L nc 0.095 0.018 Fluoranthene µg/L nc 0.37 0.095 U µg/L nc 0.12 0.095 U µg/L nc 1.1 0.095 U Fluorene Naphthalene a Phenanthrene µg/L nc 0.48 0.095 U Pyrene µg/L nc 0.41 0.095 U Benzo(a)anthracene µg/L c 0.12 0.018 Benzo(a)pyrene µg/L c 0.14 0.019 Benzo(b)fluoranthene µg/L c 0.14 0.026 Benzo(k)fluoranthene µg/L c 0.048 0.0095 U Chrysene µg/L c 0.17 0.023 Dibenz(a,h)anthracene µg/L c 0.022 0.0095 U Indeno(1,2,3-c,d)pyrene µg/L c 0.076 0.013 Benzo(a)anthracene TEF 0.1 0.01 0.002 Benzo(a)pyrene TEF 1 0.14 0.019 Benzo(b)fluoranthene TEF 0.1 0.01 0.003 Benzo(k)fluoranthene TEF 0.1 0.005 0 Chrysene TEF 0.01 0.002 0.0002 Dibenz(a,h)anthracene TEF 0.4 0.009 0 Indeno(1,2,3-c,d)pyrene TEF 0.1 0.008 0.001 SUM: 0.19 0.02 MTCA Method A Groundwater 0.1 0.1 Toxicity Equivalency Evaluation Source: (Pacific Groundwater Group 2007) Analytical method: EPA 8270C/SIM a Naphthalenes cleanup level for MTCA Method A Groundwater is 160 µg/L Green highlight – sum of toxic equivalents exceeds MTCA Method A Groundwater c – carcinogen Carc. – carcinogen EPA – US Environmental Protection Agency µg/L – micrograms per liter MTCA – Model Toxics Control Act nc – non-carcinogen PAH – Polycyclic Aromatic Hydrocarbon TEF: toxicity equivalency factor U – parameter not detected; # – laboratory practical quantitation limit - Port_ of SeanIe Terminal 108 Environmental Conditions Report FINAL Appendix E January 23, 2009 Page 12 Table E-11. Summary of PCBs in S Oregon St groundwater samples UNITS B06-2 B06-5 Aroclor 1016 PCB µg/L (ppb) 0.048 U 0.048 U Aroclor 1221 µg/L (ppb) 0.048 U 0.048 U Aroclor 1232 µg/L (ppb) 0.048 U 0.048 U Aroclor 1242 µg/L (ppb) 0.048 U 0.048 U Aroclor 1248 µg/L (ppb) 0.048 U 0.048 U Aroclor 1254 µg/L (ppb) 0.053 0.070 Aroclor 1260 µg/L (ppb) 0.048 U 0.048 U Aroclor 1262 µg/L (ppb) 0.048 U 0.048 U Aroclor 1268 µg/L (ppb) 0.048 U 0.048 U Total PCBs 0.053 0.070 MTCA Method A Groundwater 0.1 0.1 Source: (Pacific Groundwater Group 2007) Analytical method: EPA 8082 µg/L – micrograms per liter MTCA – Model Toxics Control Act PCB – polychlorinated biphenyl ppb – part per billion PQL – practical quantitation limit U – parameter not detected; # – laboratory practical quantitation limit - Port_ of SeanIe Terminal 108 Environmental Conditions Report FINAL Appendix E January 23, 2009 Page 13 Table E-12. Summary of petroleum hydrocarbon compounds and metals in S Oregon St UNIT MTCA METHOD A GROUNDWATER B06-2 B06-5 µg/L 5 1.0 U 1.0 U Toluene µg/L 1,000 1.0 U 1.0 U Ethyl Benzene µg/L 700 1.0 U 1.0 U m,p-Xylene µg/L 1,000 1.0 U 1.0 U o-Xylene µg/L 1,000 1.0 U 1.0 U TPH-Gas µg/L 1,000 100 U 100 U Diesel Range mg/L 0.5 0.27 U 0.26 U Lube Oil mg/L 0.5 1.5 0.41 U Arsenic µg/L 5 5.7 3.0 U Cadmium µg/L 5 4.0 U 4.0 U Copper µg/L 10 U 10 U Lead µg/L 1.0 U 1.0 U Nickel µg/L 20 U 20 U Zinc µg/L 25 U 25 U CHEMICAL NWTPH-Gx/BTEX Benzene NWTPH-Dx Dissolved Metals (EPA 200.8) 15 Source: (Pacific Groundwater Group 2007) Green highlight – sum of toxic equivalents exceeds MTCA Method A Groundwater EPA – US Environmental Protection Agency µg/L – micrograms per liter mg/L – milligrams per liter MTCA – Model Toxics Control Act NWTPH-Dx – Northwest total petroleum hydrocarbons - diesel extractable NWTPH-Gx – Northwest total petroleum hydrocarbons - gasoline extractable ppb – parts per billion PQL – practical quantitation limit TPH – total petroleum hydrocarbons U – parameter not detected; # – laboratory practical quantitation limit - Port_ of SeanIe Terminal 108 Environmental Conditions Report FINAL Appendix E January 23, 2009 Page 14 Table E-13. Summary of Duwamish/Diagonal CSO/SD source-tracing sediment data (metals and TPH) TYPE COUNT Catch Basin 44 Right-of-way Catch Basin 36 In-line sediment grab 33 In-line sediment trap 45 Mean Range Mean Range Mean Range Mean Range ARSENIC 11 (3 – 40) 7.4 (2.5 – 30) 7.3 (2.5 – 23) 7.0 (3 – 25) COPPER 230 (29.6 – 1520) 115 (38.4 – 751) 89 (22.4 – 340) 138 (6.6 – 597) METALS (mg/kg dw) LEAD MERCURY 410 0.28 (10 – 5,830) (0.02 – 2.05) 161 0.15 (19 – 1,370) (0.02 – 1.17) 254 0.26 (15 – 4,910) (0.01 – 3.3) 116 0.20 (29 – 360) (0.025 – 2.8) ZINC 696 (54.9 – 3,940) 349 (84.7 – 966) 273 (85 – 718) 508 (162 – 1,930) Source: (Schmoyer 2008) Note: Summary statistics were calculated using one half the detection limit for non-detected values. CSO – combined sewer overflow dw – dry weight mg/kg – milligrams per kilogram SD – storm drain TPH – total petroleum hydrocarbons - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix E January 23, 2009 Page 15 TPHS (mg/kg dw) TPH - DIESEL TPH - OIL 4160 15,200 (0 – 46,000) (0 – 250,000) 1120 4,150 (130 – 6,400) (480 – 14,000) 1,630 56,300) (0 – 13,000) 605 2570 (0 – 1,900) (0 – 7,500) Table E-14. Summary of Duwamish/Diagonal CSO/SD source-tracing sediment data (Phthalates, PCBs, and PAHs) TYPE Catch Basin Right-of-way Catch Basin In-line sediment grab In-line sediment trap COUNT Mean 44 Range Mean 36 Range 33 45 Mean Range Mean Range BEP 37,300 (130 – 200,000) PHTHALATES, PCBS AND PAHS (µg/kg dw) BBP TOTAL PCBS HPAH 3,110 261 19,700 (19.5 – 18,000) (8.5 – 3,200) (95 – 256,800) LPAH 6,040 (57 – 44,965) 9,570 (740 – 48,000) 1,960 (0 – 8,900) 11,000 (0 – 67,000) 1,720 (19.5 – 37,000) 156 (0 – 900) 663 (0 – 3,400) 2,040 (155 – 13,800) 766 (0 – 8,250) 2,640 (0 – 19,750) 90 (9.5 – 670) 123 (0 – 1,000) 298 (22 – 3,250) 5390 (461.5 – 24,290) 3,120 (0 – 17,850) 12,300 (0 – 127,580) Source: (Schmoyer 2008) Note: Summary statistics were calculated using one half the detection limit for non-detected values. BEP – bis(2-ethylhexyl)phthalate BBP – butylbenzylphthalate CSO – combined sewer overflow dw – dry weight HPAA – high-molecular-weight polycyclic aromatic hydrocarbon LPAH – low-molecular-weight polycyclic aromatic hydrocarbon µg/L – micrograms per liter SD – storm drain PCB – polychlorinated biphenyl - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix E January 23, 2009 Page 16 Table E-15. Detection frequencies and concentration ranges for pollutants in Duwamish/Diagonal CSO/SD stormwater, 1995 DETECTION FREQUENCY CONCENTRATION (μg/L) Arsenic (total) PARAMETER 10/10 2–4 Cadmium (total) 10/10 0.4 – 1.3 Chromium (total) 10/10 2 – 22 Copper (total) 10/10 2 – 119 Lead (total) 10/10 9 – 68 Mercury (total) 1/10 0.3 Zinc (total) 10/10 50 – 225 Bis(2-ethylhexyl) phthalate 9/10 0.9 – 14.7 Butyl benzyl phthalate 5/10 0.79 – 1 Dimethyl phthalate 1/10 0.825 Di-n-butyl phthalate 1/10 9.13 Fluoranthene 1/10 0.84 PCBs 0/10 <0.26 – <0.5 Pyrene 1/10 0.998 Source: Ecology (2004) CSO – combined sewer overflow mg/kg – milligrams per kilogram PCB – polychlorinated biphenyl SD – storm drain - Port_ of SeanIe Terminal 108 Environmental Conditions Report FINAL Appendix E January 23, 2009 Page 17 Table E-16. Storm drain sediment samples in Duwamish/ Diagonal CSO/SD system, 1985 CHEMICAL Zinc (mg/kg) MEASURED CONCENTRATION SAMPLE MH1 SAMPLE MHU 293E 419E SQS 410 CSL 960 Organic compounds (mg/kg TOC) Acenaphthene 83E 63U 16 57 Fluorene 65E 54U 23 79 Phenanthrene 270E 49E 100 480 Total LPAH 574 379 370 780 Fluoranthene 230E 74E 160 1,200 Benzo(a)anthracene 210E 12E 110 270 Chrysene 240E 29E 110 460 Total benzofluoranthenes 350E 66E 230 450 Benzo(a)pyrene 140E 3.4E 99 210 Indeno(1,2,3-c,d)pyrene 170E 220U 34 88 Dibenzo(a,h)anthracene 47E 340U 12 33 Benzo(g,h,i)perylene 130E 200U 31 78 Total HPAH 1,697 1,001 960 5,300 1,2-Dichlorobenzene 39XE 270U 2.3 2.3 1,4-Dichlorobenzene 5,200XE 7,100X 3.1 9 Dimethyl phthalate 56E 40U 53 53 Dibenzofuran 45E 69E 15 58 Phenol 1,500E 75B 420 1,200 4-Methylphenol 5,900E 870E 670 670 Source: Tetra Tech as cited in Ecology (2004) B – compound detected in method blank – possible laboratory contamination CSO – combined sewer overflow E – estimated value HPAH– high-molecular-weight polycyclic aromatic hydrocarbon LPAH – low-molecular-weight polycyclic aromatic hydrocarbon mg/kg – milligrams per kilogram SD – storm drain TOC – total organic carbon U – Compound not detected at value shown X – Standard recovery <10 % - Port_ of SeanIe Terminal 108 Environmental Conditions Report FINAL Appendix E January 23, 2009 Page 18 Table E-17. Storm drain sediments in Duwamish/Diagonal SD, 1985 CHEMICAL Chromium UNITS mg/kg MEASURED CONCENTRATION 287E SQS 260 CSL 270 Zinc mg/kg 675E 410 960 Di-n-octyl phthalate mg/kg TOC 560ZE 58 4,500 Indeno (1,2,3-c,d)pyrene mg/kg TOC 85E 34 88 Source: Tetra Tech as cited in (Ecology 2004) CSL – cleanup screening level E – Estimated value mg/kg – milligrams per kilogram SD – storm drain SQS – sediment quality standard TOC – total organic carbon Z – Concentration corrected for blank contribution. Value still exceeds detection limit. REFERENCES Ecology. 2004. Lower Duwamish Waterway source control action plan for the Duwamish/Diagonal Way early action cleanup. No. 04-09-003. Washington Department of Ecology, Northwest Regional Office, Toxics Cleanup Program, Bellevue, WA. Pacific Groundwater Group. 2007. Soil and groundwater data report, Oregon Street right-of-way, Port of Seattle. Pacific Groundwater Group, Seattle, WA. Schmoyer B. 2008. Personal communication (e-mail to Jeffrey Fellows, Windward Environmental, regarding source data through December 2007, with Excel attachment: source_chemistry_thru_12-07b.xls). Seattle Public Utilities, Seattle, WA. June 3, 2008. - Port_ of SeanIe Terminal 108 Environmental Conditions Report FINAL Appendix E January 23, 2009 Page 19 Appendix F T-108 Reference Documentation (Electronic copies of references provided on accompanying CD) AUTHOR PUBLICATION DATE TYPE OF REFERENCE EPA Region 10 On-Scene Coordinator’s report on the Duwamish Waterway PCB spill USEPA, Region 10 2/12/1975 Spill response report Report includes details of the September 13, 1974 PCB spill from a transformer into the Duwamish Waterway and the subsequent cleanup efforts. Report includes maps of the spill area. Various notes and correspondences from Port of Seattle files regarding the PCB spill and cleanup Various 1974 Letters, maps, notes Various letters, notes, and maps regarding the cleanup of the Slip 1 PCB spill and attempt considerations of temporary disposal areas for dredged material. Excerpt of report regarding PCB spill from Ecology files unknown unknown Report excerpt, map Excerpt includes three pages plus a map from an unknown report on the PCB spill. Brown and Caldwell 1958 Report Report is a survey of drainage and sewage systems in the Seattle Metropolitan area. The Diagonal Way Sewage Treatment Plant is discussed in the report. Progress Report Consultation, Soil and Water Test Results, Duwamish Waterway Property, Seattle, Washington for Chiyoda International Corporation Dames and Moore 6/25/1984 Data report Data report discussing the collection of soil and water samples on the Chiyoda property. Report includes sampling of three wells, two seeps, and a sample from the Duwamish Waterway. Water and soil samples were analyzed for PCBs and metals. Includes map of sampling locations. Excerpts of soil sampling data reports on the eastern parcel of T-108 from an undated Dames and Moore report Dames and Moore unknown Data report excerpts Dames and Moore data report excerpt contains information on historical soil boring and test pit sampling at the approximate location of the sewage disposal pits and other locations on the eastern parcel of T-108. Based on sample identification numbers, the sampling may have occurred in 1984. Port of Seattle notes taken at time of property acquisition from Chiyoda unknown 7/12/1984 Notes Port of Seattle notes (hand-written) regarding PCB dredge disposal, taken at the time of property acquisition from Chiyoda Letter from J. Dohrmann, Port of Seattle, to A. McClellan, Bogle and Gates Port of Seattle 4/10/1984 Letter Letter from J. Dohrmann, Senior Environmental Planner, Port of Seattle, to A. McClellan, Bogle and Gates, recommending sampling TITLE 1974 PCB Spill and Dredge Disposal NOTES Diagonal Sewage Treatment Plant Metropolitan Seattle Sewerage and Drainage Survey Chiyoda-Related Information - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix F January 23, 2009 Page 1 TITLE AUTHOR PUBLICATION DATE TYPE OF REFERENCE NOTES at Chiyoda site. Mitigation Area SEPA Environmental Checklist Determination of NonSignificance (DNS) Port of Seattle 9/27/1985 SEPA Checklist SEPA Checklist DNS for construction of the T-108 mitigation area. Checklist includes project description and assessment. Letter from Kari Rokstad, Department of Ecology, to Robert Wells, Port of Seattle Kari Rokstad, Ecology 10/14/1985 Business letter Letter commenting on the mitigation project SEPA DNS. Letter from Don Vogt, Washington State Dept. of Natural Resources (DNR), to Robert Wells, Port of Seattle, regarding 4601 Diagonal Ave S. shallow water habitat Don Vogt, Washington State DNR 10/16/1985 Business letter Letter agreeing to Port’s SEPA DNS for mitigation area. Letter from George Blomberg, Port of Seattle, to Alisa Ralph, USACE regarding T-108, Intertidal Mitigation Excavation, Second Revision, Corps of Engineers Public Notice of Application Reference No. 071-OYB-2-010439 George Blomberg, Port of Seattle 1/19/1987 Business letter Letter regarding revisions to intertidal mitigation project plans. Terminal 108 Intertidal Mitigation Site Monitoring Plan Port of Seattle 1/1987 Report Background information on the T-108 mitigation area and monitoring program description. Includes three maps/plan sketches. Report attached to 1/19/1987 letter from George Blomberg to Alisa Ralph. Letter from George Blomberg, Port of Seattle, to Alisa Ralph, USACE with subject: Terminal 108 Intertidal Mitigation Excavation, Biological Monitoring Plan, Corps of Engineers Reference Number 071-OYB-2-010439 George Blomberg, Port of Seattle 1/30/1987 Business letter Letter includes monitoring protocol for the intertidal mitigation site. Letter from M.F. Palko, Department of Ecology, to the Port of Seattle regarding Water Quality Certification Public Notice No. 071-OYB-2-010439-R M.F. Palko, Department of Ecology 2/19/1987 Business letter Letter expressing compliance of mitigation project with several sections of the Federal Water Pollution Control Act and outlining several provisions to be met by the project to maintain compliance. Hydraulic Project Approval form attached to letter. Dredging maps for the mitigation area and notes associated with City of Seattle Master Use Permit (MUP) No. 8505031 unknown 1986 Maps and notes Maps showing mitigation area and construction notes discussing dredging and fill of mitigation site. Map of mitigation site shows small area of contaminated material to be removed to an upland disposal facility. Letter with attached sampling methods from Gary Mauseth, Northern Technical Services, to Doug Hotchkiss, Port of Seattle, regarding benthic sampling at Terminal 30/Diagonal Way, POS #P-03925 G. Mauseth 11/7/1985 Letter report “Diagonal Way” refers to the T-108 mitigation site. Benthic invertebrates were collected as part of the establishing monitoring plan for the mitigation project. Engineering drawings for the mitigation area and public access area Various Various (mid- 1980s through early-1990s) Engineering drawings Engineering drawings for the construction and maintenance of the mitigation area and associated public access area. - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix F January 23, 2009 Page 2 TITLE Pioneer Construction Aggregate Storage AUTHOR PUBLICATION DATE TYPE OF REFERENCE NOTES SEPA Environmental Checklist, DNS Port of Seattle 3/1985 SEPA checklist Port SEPA checklist for proposal to establish a temporary barge unloading and construction aggregate storage area on T-108. Project applicant is Pioneer Construction Materials Co. Correspondence between L. Taylor, Port of Seattle, and W. Justen, Seattle Dept. of Construction and Land Use (DCLU) L. Taylor, Port of Seattle and W. Justen, Seattle DCLU 1985 Business letters and map Letter discussing comments from Seattle Dept. of Construction and Land Use comments on the SEPA DNS for the aggregate storage area. Attached location map shows approximate location of proposed aggregate storage area and approximate location of former sewage lagoons. Report of Geotechnical Investigation, Port of SeattleTerminal 108 Site, Seattle, Washington Dames and Moore 9/7/1988 Report and map Report outlines the planned development for construction of a Lafarge facility on the western parcel of T-108, and information on geotechnical conditions at the site. Map is a plot plan showing the proposed locations of silos, a truck scale, and roadways associated with the development. Terminal 108, Bulk Cement Transshipment Facility, Port of Seattle SEPA Determination of Non-significance (DNS) of Proposed Action Port of Seattle 11/4/1988 SEPA form and maps SEPA DNS for proposed project to construct a bulk cement transshipment facility on the western parcel of T-108. Project proposal includes a barge moorage, upland storage silos and warehouse structures, rail and truck access and loading facilities, an office area, shoreline stabilization, and public access improvements for the shoreline. File includes map of T-108 and legal property description. City of Seattle Analysis and Decision of the Director of the Department of Construction and Land Use City of Seattle Land Use Division 11/4/1989 Analysis and Decision of the Director of the Department of Construction and Land Use form Description and analysis of the Master Use Permit for construction of a marine terminal for bulk cement transshipment at T-108. Attached Exhibit No. 4 is a Port of Seattle SEPA DNS for the proposed action. SEPA DNS of Proposed Action for Removal of Existing Dry Bulk Cement Storage Silos and Associated Upland Fixtures Port of Seattle 7/21/1999 SEPA DNS form Includes description of proposed action Seattle Dept. of Design, Construction, and Land Use Master Use Permit Notice of Decision (Application No. 9905283) for removal of trade fixtures at Lafarge facility Seattle Dept. of Design, Construction, and Land Use 8/10/1999 Master Use Permit Notice of Decision Master Use Permit to demolish existing structures and fixtures on Lafarge property. Permit includes letter from Ted Graham, Lafarge Corporation, to Bill Heath, Port of Seattle regarding Termination of Port of Seattle Lease No. 02454 0 STD, and correspondence from George Blomberg, Port of Seattle, regarding equipment removal and site closeout. Lafarge Bulk Cement Transshipment Facility - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix F January 23, 2009 Page 3 PUBLICATION DATE 8/10/1999 and 9/24/1999 TYPE OF REFERENCE Business letters J. Buening, Windward Environmental (recorded notes of telephone conversation with G. Blomberg) 7/11/2008 Personal communication G. Blomberg provided information on the historical use of a cement unloading pit and other operations at the Lafarge facility. Various Various (1989 and 1993) Engineering drawings Engineering drawings for the Lafarge facility, including plans for a cover building that was never constructed. Various Port of Seattle correspondences regarding the transfer of the western parcel of T-108 to Chevron U.S.A., Various 1984 Port of Seattle memorandums Correspondences include recommendations for environmental characterization of the site and a map of the site and historical sampling locations. Underground Storage Tank Removal and Excavation Report, Chevron Service Station No. 0083, Madison Street and Boren Avenue, Seattle, Washington Rittenhouse-Zeman & Associates, Inc. 5/9/1989 Report Underground storage tank removal report for a Chevron station on Boren Avenue. This excavation was the source of the soil that was landfarmed on T-108. Quantitative Chemistry Results for Soils Stockpiled at the Chevron U.S.A. Inc. Chiyoda Site, Seattle, Washington Thorne Environmental 6/1990 Report Report on sampling of soil stockpile stored and landfarmed on T-108 that originated from the underground storage tank excavation at a Chevron facility on Boren Avenue. Report includes data tables and map showing approximate soil stockpile location. Letter report from E. Larsen, Pacific Environmental Group, to S. Bruce, Chevron U.S.A., Regarding Soil Landfarming at Chevron Site 4097 E. Larsen, Pacific Environmental Group 1/3/1991 Letter report Letter report regarding background information for and details of the landfarming process conducted on T-108 by Chevron. The report also includes monitoring results of the soil after landfarming. Report includes data tables and maps of the landfarming area. Letter and report from Applied Geotechnology, Inc. to S. Bruce, Chevron U.S.A., Inc. entitled Proposal- Plan of Action Supplemental Site Assessment Chevron U.S.A. Site 4097, 4525 Diagonal Avenue South, Seattle, Washington Applied Geotechnology, Inc. 10/2/1991 Cover letter and report Plan of Action to assist Chevron in preparing a Corrective Action Plan (CAP) for the eastern parcel of T-108. Report includes site history and background information, site reconnaissance observations, and a summary of the nature and extent of contamination as understood at the time report was issued. Site Assessment Summary, Site 64534097, 4525 Diagonal Avenue S, Seattle, Washington Applied Geotechnology Inc. 8/6/1992 Cover letter (dated 2/17/1993), Report summarizes environmental assessments conducted on the eastern parcel of T-108 from1981 to 1992. Historical soil and groundwater data are presented in the report, as well as TITLE Letters from G. Blomberg, Port of Seattle, to Puget Sound Clean Air Agency (PSCAA) regarding Notice of Intent and Close-Out of Existing Dust Control Equipment Port of Seattle, Terminal 108, 4601 Diagonal Avenue South, Seattle, Washington, Case Number 9901092 AUTHOR G. Blomberg, Port of Seattle Personal communication (telephone call) from G. Blomberg, Port of Seattle, to J. Buening, Windward Environmental, regarding historical operations at the Lafarge facility Engineering drawings for the Lafarge facility NOTES Notice of close-out of existing dust control equipment (including four steel dry bulk cement storage silos and a pneumatic conveyor system) at the Lafarge Corporation property on T-108 and statement that structures do not contain asbestos. Chevron-Related Information - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix F January 23, 2009 Page 4 TITLE AUTHOR PUBLICATION DATE TYPE OF REFERENCE report and maps NOTES groundwater data collected by Applied Geotechnology as part of this investigation. Supplemental Site Investigation, Chevron U.S.A. Site 64534097, 4525 Diagonal Avenue South, Seattle, Washington-DRAFT Applied Geotechnology, Inc. (prepared for Chevron) 1/7/1992 Report Environmental investigation including soil and groundwater data for the eastern parcel of T-108. Copy is marked with comments from Doug Hotchkiss (Port of Seattle). Environmental Investigation Chevron U.S.A. Site No. 4097, 4525 Diagonal Avenue South, Seattle, Washington Pacific Environmental Group, Inc. 1/5/1991 Report Report on soil and groundwater investigation conducted on T-108 for Chevron U.S.A. Report includes maps and data tables. Letter from B. Bunch, CCI, to J. Bazemore, Port of Seattle J. Bazemore, CCI 12/9/1993 Business letter Letter regarding CCI’s Pollution Prevention Plan with attached Contingency Plan. Letter from B. Bunch, CCI, to B. Heath and J. Bazemore, Port of Seattle J. Bazemore, CCI 3/4/1994 Business letter Letter regarding pollution prevention measures at T-106 W. Attachments include a letter from A. Farr regarding Ecology’s NPDES Baseline General Permit for Stormwater Discharges and Port of Seattle guidance on preparing Surface Water Pollution Prevention Plans (SWPPPs), a portion of CCI’s contingency plan, and internal Port messages regarding T-106 and possible Port of Seattle Chevron Property Development Order of Magnitude Cost Estimate and Report TAMS Consultants, Inc. 5/22/1992 Report Report outlines container repair/storage yard development phases and associated costs, specifications for development of access road and new rail spur, and maps of project area including a groundwater elevation contour map. Appendix includes a geotechnical report by Dames and Moore dated 5/12/1992. Letter from D. Soike, Port of Seattle, to Port staff with subject: T-108, Chevron/Chiyoda Development for Container Care, Inc. (CCI), File EN 12.1.40 D. Soike, Port of Seattle 6/2/1992 Memorandum Memo discussing several items related to eastern parcel redevelopment. Memo discusses Chevron’s use of the property to store and “land farm” soils and soil testing results. Memo with subject: T-108 Development Railroad Access for CCI and Lafarge Files 12.1.40, 5.4.3, 5.4.5 D. Soike, Port of Seattle 7/13/1992 Memorandum Memo from D. Soike, Port of Seattle, to A. Lowe, Manager of Harbor Planning and Acquisition regarding permits obtained by the Port of Seattle from the City of Seattle to construct a railroad spur across Diagonal Ave S. Map: Railroad Crossing Diagonal Avenue S. Site Plan Port of Seattle 5/21/1992 Map Map showing railroad spur crossing Diagonal Avenue S. Preliminary Design and Cost Estimate, Proposed Development for Container Care, T-108/Chevron/ Chiyoda, Seattle, Washington Dames and Moore 6/23/1992 Report Includes information about subsurface conditions on the Chevron property, utilities present along S Oregon St., and additional information about the property redevelopment and access road to T106W. Environmental Checklist for T-108 Improvements Port of Seattle 6/23/1992 Environmental Contains details of the terminal redevelopment project. Terminal 108 Redevelopment and Container Care International (CCI) - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix F January 23, 2009 Page 5 TITLE AUTHOR PUBLICATION DATE TYPE OF REFERENCE Checklist form (Application No. 9203345) NOTES City of Seattle Dept. of Engineering Application for Utilities Permit to the Board of Public Works City of Seattle 7/2/1992 Utilities permit application form Permit granted for construction and maintenance of railroad spur track along and across Diagonal Ave S. Letter with subject: T-108- Lafarge Railroad Spur D. Soike, Port of Seattle 8/20/1992 Business letter Letter from D. Soike, Port of Seattle, to J. McAllister, Manager of Marine Real Estate, regarding railroad spur across Diagonal Ave S. Map of Terminal 106W and Terminal 108 showing a proposed paved road to cross S Oregon St. and link T108 with T-106W Port of Seattle No date visible on map Map Map of proposed access road between T-106W and T-108. Various Correspondences Regarding T-108 Rip-Rap Repair Various Various dates, 1992 and 199. Fax, business letters, notes Correspondences regarding rip-rap repair project at the public access area of T-108. Hydraulic Project Approval for Rip-Rap Repair project Washington State Department of Fisheries 10/5/1992 Permit approval form Approval and conditions of rip-rap repair project. Shoreline Substantial Development Master Use Permit, Attachment C.2 Port of Seattle 6/25/1992 Permit application Shoreline Substantial Development Master Use permit submitted to the City of Seattle for terminal redevelopment project. Permit application no. 9203345. Hydraulic Project Approval (HPA) form for riprap repair project at T-30 Washington State Department of Fisheries 10/5/1992 HPA form Hydraulic Project Approval (HPA) form for riprap repair project at T30; relevance to T-108? Letter from B. Hinkle, Port of Seattle, to B. Ritchie, Ecology, regarding T-108 Improvements, Environmental Checklist POS SEPA File Number (92-14) B. Hinkle, Port of Seattle 12/9/1992 Business letter Letter is in response to Ecology comments on the SEPA Checklist for the T-108 redevelopment; also mentions potential contamination along the north half of the S Oregon St right-of-way possibly originating from the Washington State Liquor Control Board property. Shoreline Management Act Permit for Shoreline Management Substantial Development, Conditional Use, or Variance, Application No. 9203345 City of Seattle Dept. of Construction and Land Use 12/31/1992 SMA permit SMA Substantial Development permit for future grading of 10,000 cubic yards of cut and fill for the improvement of an access road at T-108. Permit includes legal descriptions of T-108 parcels Seattle Department of Construction and Land Use Notice of Decision for Application No. 9203345 Seattle Department of Construction and Land Use 12/31/1992 City of Seattle Construction and Land Use Notice of Decision Analysis and decision regarding application for Shoreline Substantial Development permit, project Application No. 9203345; decision states that the permit is conditionally granted. Letter with subject: T-108 Development, S/MUP Permit Conditions for Engineering Response, City S/MUP Application No. 9203345, File No. ENG 12.1.40 D.Soike, Port of Seattle 1/12/1993 Business letter Letter from David Soike, Port of Seattle, to Michael Harr, CCI regarding the need for CCI to respond to several conditions of the City of Seattle S/MUP/building permit related to operations at T-108 - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix F January 23, 2009 Page 6 TITLE AUTHOR PUBLICATION DATE TYPE OF REFERENCE NOTES in order for the permit to be issued. Fax and letter from D. Soike, Port of Seattle, to D. Stuart, City of Seattle, and K. Jones, Manager, Engineering Street Use, Seattle Engineering Department Street Use D. Soike, Port of Seattle 4/12/1993 (fax) and 1/28/1993 (letter) Fax and business letter Fax regarding the street use permits and other necessary requirements to be met by the Port prior to the Oregon St. vacation and development project (part of terminal redevelopment plans). Letter regarding the proposed paved access road to be built across S Oregon Street to link T-108 and T-106W. Attached map includes location of proposed road, utilities in the S Oregon St right-of-way, T-108 property boundaries and tenant names, and adjacent property ownership/uses. Fax from D. Soike, Port of Seattle, to D. Stuart , City of Seattle D. Soike, Port of Seattle 4/13/1993 Fax with attachment(s) Fax regarding the street use permits to be met by the Port prior to the Oregon St. vacation and development project (related to terminal redevelopment project). Master Use and Construction Application and Permit, No. 668231 City of Seattle Dept. of Construction and Land Use 5/7/1993 Master Use and Construction application and permit form Permit for T-108 eastern parcel site development; contains basic summary of project activities. Letter from V. Simpson, Law Offices of Hillis Clark Martin and Peterson, to D. Soike, Port of Seattle, regarding T108 Chevron Site Redevelopment (DCLU #9203345) V. Simpson, Law Offices of Hillis Clark Martin and Peterson 5/6/1993 Business letter Letter regarding additional information requested by the Seattle Dept. of Construction and Land Use for Application No. 9203345 regarding the checker booth and load/unload platform. Letter from B. Hinkle, Port of Seattle, to D. Stuart, City of Seattle Dept. of Construction and Land Use regarding Shoreline Substantial Development Permit Application No. 9203345, Terminal 108 Improvements, and letter from B. Bunch, CCI, to B. Hinkle regarding CCI spill contingency plan B. Hinkle, Port of Seattle and B. Bunch, CCI 2/23/1993 (Hinkle letter) and 1/19/1993 (Bunch letter) Business letters Letter from B. Hinkle to D. Stuart provided in response to shoreline and SEPA conditions of approval necessary for issuance of Master Use Permit No. 9203345. Letter from B. Bunch to B. Hinkle includes excerpt of CCI contingency plan. Letter from David Soike, Port of Seattle, to Sarah Armstrong, Port of Seattle, regarding rip-rap repair at T108. Port of Seattle 2/23/1993 Letter from R. Krochalis, Seattle Dept. of Construction and Land Use, to the Port of Seattle, regarding posting and maintenance of Certificate of Occupancy Rick Krochalis, Seattle Dept. of Construction and Land Use Attached Certificate of Occupancy dated 3/9/1995 Business letter and attached certificate Letter contains Certificate of Occupancy for “B-2 Office Trailer Checker’s Booth”, Building Permit No. 668231. Letter from D. Soike, Port of Seattle, to B. Bunch, CCI, regarding Permit for T-108 Truck Entry Checkers Booth D. Soike, Port of Seattle 4/7/1995 Business letter Letter providing CCI with copies of City of Seattle permit for T-108 truck entry checkers booth, assumed to be Certificate of Occupancy for “B-2 Office Trailer Checker’s Booth”, Building Permit No. 668231. Baseline General NPDES Permit for Storm Water Department of 6/9/1993 NPDES Copy of the Port’s general industrial permit issued by Ecology on - Port_ of Seattle Terminal 108 Environmental Conditions Report Internal Port memorandum regarding rip-rap repair. FINAL Appendix F January 23, 2009 Page 7 PUBLICATION DATE TYPE OF REFERENCE general permit J. Krull, Department of Ecology 3/4/1994 NPDES general permit notice of termination Confirmation of Notice of Termination from Ecology to the Port of Seattle for NPDES permit held for discharge of construction site storm water during terminal redevelopment activities. Letter from V. Sutton, Ecology, to T. Sundesten, CCI, regarding Dangerous Waste Compliance Inspection at CCI (RCRA ID# WAD040197014) V. Sutton, Ecology 9/26/2001 Business letter with attached compliance report Letter states that there were several areas of non-compliance with Dangerous Waste Regulations identified at CCI during inspection on 8/14/2001; attached compliance report contains site photographs and inspection summary. Letter from R. Woods, City of Seattle, to T. Sundesten, CCI, regarding results from January 10, 2002 stormwater pollution prevention re-inspection R. Woods, City of Seattle 2/4/2002 Business letter and photographs Letter contains inspection results and attached photographs. Engineering Drawings related to terminal redevelopment Various Various (1992, 1993, and-1995) engineering drawings Multiple engineering drawings regarding several aspects of the T108 redevelopment project and CCI operations on T-108. T-108 Groundwater and Shoreline Soil Investigation Final Work Plan Pacific Groundwater Group 5/3/2006 Work plan Work plan for soil and groundwater investigation at T-108. Includes information on previous environmental investigations. Appendix A contains a letter report from Ward Crell, Pacific Environmental Group to Joe Hickey, Department of Ecology, regarding proposed landfarming activities by Chevron at the T-108 eastern parcel. Letter report includes analytical results from soil collected at the proposed landfarming area and from soil samples collected from the soil stockpiled to be landfarmed. Port of Seattle T-108 Interim Groundwater and Soil Investigation Pacific Groundwater Group 12/18/2006 Report Report includes results of an environmental investigation on T-108 including soil and groundwater sampling results. Report includes maps, well construction logs, Port of Seattle T-108 Groundwater Investigation Final Report Pacific Groundwater Group 10/8/2007 Report Report includes information on site history, description, and hydrogeology, groundwater flow information, and analytical results for groundwater samples collected over 4 rounds. Soil and Groundwater Data Report, Oregon Street Rightof-Way, Phase II Investigation Pacific Groundwater Group 1/8/2007 Report Results of Phase II environmental investigation of the Oregon St. Right-of-Way including bore logs, soil data, groundwater data, and intertidal sediment data Draft South Oregon Street 2006 Environmental Data Review and Summary Pacific Groundwater Group 2/10/2006 Report Environmental review of the South Oregon Street right-of-way, includes information on the historical drainage channel located in TITLE Discharges (associated with terminal redevelopment construction storm water) AUTHOR Ecology Letter from J. Krull, Ecology, to D. Soike, Port of Seattle, regarding Notice of Termination of Coverage under Baseline General NPDES Permit for Storm Water Discharges for construction stormwater discharges NOTES June 9, 1993 for stormwater discharges associated with construction econ T-108. Permit No. SO3001309 Environmental Investigations Conducted for the Port of Seattle - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix F January 23, 2009 Page 8 TITLE AUTHOR PUBLICATION DATE TYPE OF REFERENCE NOTES approximately the location of the road right-of-way. ConGlobal Lease and NPDES Permit Lease Agreement between the Port of Seattle and ConGlobal Industries Port of Seattle 4/3/2008 Lease agreement Lease agreement between the Port of Seattle and ConGlobal Industries for ConGlobal’s occupancy of T-108. Letter from N. Winters, Ecology, to J. Banks, ConGlobal, regarding ConGlobal’s Coverage under the Industrial Stormwater General Permit N. Winters, Ecology 4/24/2008 Business letter Business letter grants coverage for ConGlobal under NPDES Industrial Stormwater General Permit, Permit No. SO3-010569. Letter includes information on stormwater sampling requirements. ConGlobal Industries Stormwater Pollution Prevention Plan (SWPPP) Weston Solutions 5/8/2008 Pollution prevention plan SWPPP prepared by Weston Solutions for ConGlobal Industries. Plan includes facility and site layout information, materials inventory, information on best management practices (BMPs), and guidance for stormwater sampling and inspections. Source Control Summary Document for Duwamish/Diagonal Sediment Cleanup Project King County (received from Jeff Stern) 2/28/2007 Informal report (not known whether formally published) Background information regarding the Duwamish/Diagonal sediment area early action cleanup and source control information for properties and outfalls surrounding the cleanup area. Duwamish/Diagonal CSO/SD Sediment Remediation Project Closure Report Anchor Environmental, LLC, EcoChem, Inc. 7/27/2005 Report Closure report documenting work conducted during sediment remediation at the Duwamish/Diagonal. Describes dredging, transport, disposal, and capping methods utilized between November 2003 and March 2004. Duwamish/Diagonal CSO/SD Cleanup Study Report King County Dept. of Natural Resources and Parks, Anchor Environmental, LLC, EcoChem, Inc. 10/2005 Report Presents information on sediment sampling within the cleanup area and results of recontamination modeling to refine final delineation of cleanup area and select the sediment cleanup design. Report includes information on the Diagonal Sewage Treatment Plant. Duwamish/Diagonal CSO/SD Sediment Remediation Project 2005 Monitoring Report Anchor Environmental, LLC 5/2007 Report Report presents the results of the March and April 2005 Duwamish/Diagonal CSO/SD cleanup area sediment cap monitoring. Report includes results for two bank soil samples collected along the T-108 shoreline. Federal Center South Property Review Ecology not reported Phase I Environmental Site Assessment, Federal Center South Herrera Environmental 7/2001 Report Phase I Environmental Site Assessment for Federal Center South. Investigation includes a review of historical environmental Reports Related to the Duwamish/Diagonal Sediment Cleanup Area Environmental Investigations for Surrounding Properties - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix F January 23, 2009 Page 9 TITLE AUTHOR Consultants PUBLICATION DATE TYPE OF REFERENCE NOTES information for the property and a review of regulatory database listings. Pinnacle Geosciences 10/28/2005 Report Phase I Environmental Site Assessment for a portion of T-106W. Investigation includes a review of historical environmental information for the property and a review of regulatory database listings. Duwamish Industrial Area Hydrogeologic Pathways Project: Duwamish Basin Groundwater Pathways Conceptual Model Report Booth and Herman 4/1998 Report Report includes information on the geologic history of the Duwamish Valley and information on regional stratigraphy, which is applicable to conditions at T-108. Lower Duwamish Waterway Outfall Survey Herrera Environmental Consultants 1/2004 Summary report and inventory spreadsheet Summary report presents the purpose and methods of the survey; spreadsheet includes the outfall data (inventory). Lower Duwamish Waterway Source Control Strategy Ecology 1/2004 Report Document outlining Ecology’s strategy for implementing source control in the LDW. Source Control Action Plan for the Duwamish/Diagonal Way Early Action Cleanup area Ecology 12/2004 Report Report includes information on the properties surrounding the sediment cleanup area (including T-108), and the outfalls in the vicinity of the sediment cleanup area. King County and Seattle Public Utilities Source Control Program for the Lower Duwamish Waterway, June 2005 Progress Report King County Department of Natural Resources and Parks and Seattle Public Utilities 6/2005 Report Report documenting City of Seattle and King County source control efforts in the Lower Duwamish Waterway. Report includes information on business inspections, source-tracing sample collection, and atmospheric deposition monitoring, among other activities, within the LDW basin. Combined Sewer Overflow Control Program, 2005-2006 Annual Report King County Department of Natural Resources and Parks 10/2006 Report Annual report on the frequency and volume of CSO events in the LDW between June 2005 and May 2006. Report also provides an overview of King County’s CSO control program. Engineering Drawings of Water Main Extension , Diagonal Avenue S Port of Seattle 12/1989 Engineering drawings As-built engineering drawings for water main extension to Diagonal Avenue S. Engineering Drawings for T-108 Shoreline Stabilization Port of Seattle 1989 and 1990 Engineering drawings Engineering drawings showing area of shoreline stabilized with riprap. Phase I Environmental Site Assessment, T-106W, Building 1 LDW-Related Information Other Engineering Drawings - Port_ of Seattle Terminal 108 Environmental Conditions Report FINAL Appendix F January 23, 2009 Page 10
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