8e Memo Industrial Wastewater System Segregation Meters
COMMISSION AGENDA MEMORANDUM Item No. 8e ACTION ITEM Date of Meeting February 9, 2021 DATE: January 29, 2021 TO: Stephen P. Metruck, Executive Director FROM: Eileen Francisco, Interim Director Aviation Facilities and Capital Programs Wayne Grotheer, Director Aviation Project Management SUBJECT: Budget Increase Request Industrial Wastewater System Segregation Meters (CIP #C800655) Amount of this request: $1,615,000 Total estimated project cost: $3,889,000 ACTION REQUESTED Request Commission authorization for the Executive Director to increase the project budget for the Industrial Wastewater System (IWS) Segregation Meters project at Seattle-Tacoma International Airport (Airport). The amount of this request is $1,615,000 for a revised total estimated project cost of $3,889,000. EXECUTIVE SUMMARY This project will install four Total Organic Carbon (TOC) analyzers in the Industrial Wastewater System conveyance serving the Airfield and Terminal Areas of the Airport. These new TOC analyzers will provide operational data for the Port of Seattle Industrial Wastewater Treatment Plant (IWTP). Plant operations will use the TOC analyzer data to manage wastewater treatment and reduce the discharge of wastewater sent to Valley View Sewer District sanitary sewers and King County South Wastewater Treatment Plant. Additional budget is requested to support the installation of two additional (total of four) TOC analyzers, as well as a new concrete encased duct bank for TOC analyzer power and control connectivity. Prior Commission action on January 22, 2019, authorized the installation and necessary budget for only two TOC meters and did not provide for a concrete encased duct bank. JUSTIFICATION The Airport's IWS TOC analyzer project one of a series of projects that King Country Industrial Waste Program approved in order to comply with the future effluent limits to King County South Treatment Plant and remain in compliance with King County Industrial Waste Permit and State National Pollutant Discharge Elimination System (NPDES) Permit. Template revised January 10, 2019. COMMISSION AGENDA Action Item No. _8e___ Page 2 of 5 Meeting Date: February 9, 2021 The two additional TOC analyzers are necessary for data precision and the effective segregation of influent. The concrete encased duct bank has been deemed necessary to ensure aircraft operations and that subsequent high pavement loading will not damage below grade cabling. The 2016 King County permit required the Port to identify measures to meet future reduced effluent limitations. This IWS Segregation Meters project is the first of a series of approved capital program improvements to improve IWTP efficiency and comply with the 2025 reduced effluent limitations. Diversity in Contracting The Woman and Minority Business Enterprise (WMBE) aspirational goal is 10% for the construction project. Along with the establishment of the goal, Diversity in Contracting staff will be outreaching to WMBE firms to inform them of the upcoming opportunities within this procurement. DETAILS The IWS manages the Airport's stormwater associated with industrial activities from aircraft fueling, aircraft deicing, and maintenance operations. The IWS includes collection and conveyance, runoff storage, and the Industrial Wastewater Treatment Plant. The IWTP is highly effective in treating fuel-related stormwater pollutants. However, the plant is not capable of reducing the high Biochemical Oxygen Demand (BOD) caused by aircraft deicing operations. Runoff with BOD concentrations below those found to impact receiving water quality can be discharged directly to Puget Sound after treatment for fuel-related contamination under the Airport's NPDES permit. High BOD runoff must be pumped to the King County South Treatment Plant via the Valley View Sewer District for secondary treatment and discharge. The IWTP's discharges to King County are performed under a separate Industrial Waste Discharge Permit issued by the King County Department of Natural Resources. The installation of the four in-line TOC meters will allow the IWTP operators to continuously monitor influent water quality and effectively segregate high BOD runoff. Using the information provided by the influent TOC analyzers allows the plant operators to separate high BOD water into two lagoons (4-million-gallon capacity) and low BOD water into one much larger lagoon (76- million-gallon capacity). This project will efficiently reduce the waste water volumes discharged to Valley View Sewer District and to the King County South Treatment Plant by segregating the wastewater prior to lagoon storage. The existing influent TOC detection system has been abandoned due to technology, accessibility and maintainability issues. TOC is not currently measured until after influent water enters one of the high BOD lagoons 1 (1.5-million-gallon capacity) and is processed through the IWTP. Because the BOD is not measured until after it enters the lagoon this leads to inefficiencies by significant Template revised June 27, 2019 (Diversity in Contracting). COMMISSION AGENDA Action Item No. _8e___ Page 3 of 5 Meeting Date: February 9, 2021 dilution and increases the volume of wastewater captured and sent to Valley View Sewer District sanitary sewers and to the King County South Treatment Plant. Scope of Work Install four Total Organic Carbon analyzers into the Industrial Wastewater System that will sample wastewater prior to lagoon storage. (1) Purpose, segregation of High and Low Biochemical Oxygen Demand (BOD/Aircraft Deicer). (2) Regulatory Requirement ensures the Port fulfills the King County Industrial Waste Permit. (3) Ensure the Port remains in compliance with the NPDES Permit. Schedule Activity Commission design authorization 2017 Q2 Design start 2019 Q1 Commission construction authorization 2019 Q1 Construction start 2021 Q2 In-use date 2021 Q4 Cost Breakdown This Request Total Project Design $442,000 $972,000 Construction $1,173,000 $2,917,000 Total $1,615,000 $3,889,000 ALTERNATIVES AND IMPLICATIONS CONSIDERED Alternative 1 Do not install four new TOC Meters Cost Implications: $450,000 in capital costs spent to date would need to be expensed. Pros: (1) No further capital costs required. Cons: (1) The Port of Seattle would not be in compliance with King County Industrial and Washington Department of Ecology permits. Template revised June 27, 2019 (Diversity in Contracting). COMMISSION AGENDA Action Item No. _8e___ Page 4 of 5 Meeting Date: February 9, 2021 (2) IWTP will continue to mix low and high BOD wastewater and discharge that wastewater for treatment at a higher cost to Port of Seattle. (3) Does not ensures the Port of Seattle meets King County Discharge Permit restrictions and the Port will not be in alignment with the All Known Available and Reasonable Methods of Treatment initiative. This is not the recommended alternative. Alternative 2 Install four new TOC analyzers Cost Implications: $3,857,000 in capital is required. Pros: (1) The IWTP will be able to segregate high and low BOD wastewater and minimize the discharged wastewater that requires treatment to Valley View Sewer District sanity sewers and King Country South Wastewater Treatment Plant. (2) The Port of Seattle remains in compliance with King County and Washington Department of Ecology permits. (3) The Port of Seattle meets King County Discharge Permit restrictions and is in alignment with the All Known Available Reasonable Methods of Treatment initiative. Cons: (1) Requires a capital investment of $3,857,000. This is the recommended alternative. FINANCIAL IMPLICATIONS Cost Estimate/Authorization Summary Capital Expense Total COST ESTIMATE Original estimate $900,000 $0 $900,000 Previous changes net $1,342,000 $32,000 $1,374,000 Current change $1,615,000 0 $1,615,000 Revised estimate $3,857,000 $32,000 $3,889,000 AUTHORIZATION Previous authorizations $2,242,000 $32,000 $2,274,000 Current request for authorization $1,615,000 $0 $1,615,000 Total authorizations, including this request $3,857,000 $32,000 $3,889,000 Remaining amount to be authorized $0 $0 $0 Template revised June 27, 2019 (Diversity in Contracting). COMMISSION AGENDA Action Item No. _8e___ Page 5 of 5 Meeting Date: February 9, 2021 Annual Budget Status and Source of Funds This project (CIP #C800655) was included in the 2021 2025 capital budget and plan of finance as a business plan prospective project with a total budget of $2,242,000. The budget increase is due to support the installation of two additional (total of four) TOC analyzers as well as a new concrete encased duct bank for TOC analyzer power and control connectivity. The budget was transferred from the Aeronautical Allowance C800753, resulting in no net change in the Aviation capital budget. The funding source for this project is revenue bonds. Financial Analysis and Summary Project cost for analysis $3,857,000 Business Unit (BU) Industrial Waste System Utility Effect on business performance NOI after depreciation will increase due to inclusion of (NOI after depreciation) capital (and operating) costs in airline rate base. IRR/NPV (if relevant) N/A CPE Impact $.02in 2022 Future Revenues and Expenses (Total cost of ownership) Installing these TOC meters will reduce the risk of mixing high BOD wastewater to Lagoon 3. When Lagoon 3 results into high BOD wastewater, additional sewer charges can reach up to $400,000. Although without adequate lagoon capacities, there will always be a risk of mixing high BOD wastewater at Lagoon 3. The long-term costs will be minimized by incorporating newer more energy efficient equipment and components that meet the Ports mechanical and electrical design standards for operational costs and optimum energy utilization. Maintainability will be improved by installation of equipment with a useful life span of 20-30 years. ATTACHMENTS TO THIS (1) Presentation slides PREVIOUS COMMISSION ACTIONS OR BRIEFINGS January 22, 2019 The Commission authorized a budget increase of $1,132,000 for the design and construction for an estimated total cost of $2,274,000. June 27, 2017 The Commission authorized design and construction for an estimated cost of $1,142,000. Template revised June 27, 2019 (Diversity in Contracting).
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