PORT OF SEATTLE 
MEMORANDUM 
COMMISSION AGENDA               Item No.      4g 
ACTION ITEM 
Date of Meeting    October 10, 2016 
DATE:    September 19, 2016 
TO:      Ted Fick, Chief Executive Officer 
FROM:   Don Robbins, Senior Environmental Program Manager, Environment and
Sustainability Department 
SUBJECT:  Interlocal Agreement (ILA) with the City of Burien 

ACTION REQUESTED 
Request Commission authorization for the Chief Executive Officer to execute an interlocal
agreement with the City of Burien supporting the relocation of the Lora Lake Apartment
stormwater line. 
SYNOPSIS 
The Port is required by a state consent decree to relocate a stormwater line that crosses through
the Lora Lake Apartments remediation site in order to complete necessary contaminated soil
excavations and prepare the site for future redevelopment. Under this ILA, the Port will
contribute up to $278,000 towards a City of Burien stormwater retrofit project that will include
relocation of the line. The project will enhance water quality in Miller Creek and continue our
partnership with the City of Burien. 
There is no funding requested with this action. The $278,000 was included in the Commission's
authorized funding on September 13, 2016, for the Lora Lake Apartment remediation project. 
BACKGROUND 
A stormwater line currently crosses through the Lora Lake Apartment remediation site. The line
is within the contaminated soil excavation zone. The line conveys stormwater from 83 acres
within the City of Burien upland from the Apartment site and discharges into Lora Lake. The
stormwater pipe conveys runoff containing contaminants typical of urban development. The
Lora Lake remediation project must have this stormwater line relocated in order to complete the
contaminant excavation. Future site redevelopment will also be enhanced by the line relocation. 
The Port initially planned to relocate the pipe on-site along the northern edge of the Apartment
parcel as part of the Apartment site remedial construction contract. Under this alignment, the
stormwater line would continue to discharge into what would be the remediated Lora Lake. Port
costs to relocate the pipe on-site as part of the remediation project are estimated at $278,000.
During consent decree negotiations, the Department of Ecology indicated that the Port, as
property owner, would be required to monitor stormwater discharges into the future remediated

Template revised May 30, 2013.

COMMISSION AGENDA 
Ted Fick, Chief Executive Officer 
September 19, 2016 
Page 2 of 5 
Lora Lake and would be held liable for potential future recontamination associated with that
stormwater. 
In order to address this long-term cost and liability, the Port initiated negotiations with Ecology
and the City of Burien. As resolution, Ecology agreed to issue Burien a $1,455,632 water quality
grant funding a project that would treat runoff from the upland 83 acres with a stormwater line
relocation that avoids the Apartment site, and would no longer discharge into the Lora Lake
parcel. Although this grant would fund construction of the treatment system it is not sufficient to
fund construction of the entire stormwater line relocation.
Under this ILA, the Port would pay to the City an amount equal to the difference between the
City of Burien's final project cost and the amount provided by the Ecology Water Quality Grant
up to a maximum of $278,000, which is equivalent to the cost the Port would incur if we were to
replace the line after the contamintated soil is removed. 
PROJECT JUSTIFICATION AND DETAILS 
The ILA with the City of Burien provides an effective mechanism to relocate the stormwater line
off of the Lora Lake remediation site at a cost not to exceed that which the Port would incur if it
were to relocate the pipe itself. Relocating the line off-site, as part of the City water quality
retrofit project,  moves the pipe off of Port property avoiding any conflicts with future
redevelopment, and enhancing the parcel's value. In addition, the relocated stormwater line
would not discharge into the future remediated Lora Lake parcel, thereby eliminating long-term
monitoring costs and liability associated with potential recontamination. Port funding towards
the City effort would not exceed those costs currently in the authorized Lora lake remediation
project. 
FINANCIAL IMPLICATIONS 
There are no costs associated with this requests. Funds associated with this ILA will be paid
from the Lora Lake Apartment Site Remediation project. All Lora Lake Apartment Site
Remediation project costs will be accounted for as environmental remediation liabilities and
charged to expense in accordance with Port Policy AC-9. The Airport Development Fund will
be the funding source.
STRATEGIES AND OBJECTIVES 
This ILA will support the strategic objective of accomplishing cleanup of the Port's property,
with the intent of returning it to productive use. Without incurring additional cost to the Port,
this ILA will also support the Port's community partnerships through its support of a regional
stormwater retrofit project. 


Revised March 28, 2016  pjw

COMMISSION AGENDA 
Ted Fick, Chief Executive Officer 
September 19, 2016 
Page 3 of 5 
ALTERNATIVES AND IMPLICATIONS CONSIDERED 
Alternative 1 - Port replaces the existing stormwater line on the Lora Lake Apartment site as
part of site remediation. 
Cost Implications: $278,000 to replace pipe on site plus additional construction cost associated
with water management. 
Pros: 
(1)  Removes risk of stormwater relocation delaying Apartment site remediation. 
Cons: 
(1) Continued risk of recontaminating Lora Lake Parcel along with inherent liabilities. 
(2) Stormwater line and associated easement on Apartment Parcel will inhibit future
redevelopment. 
(3) Does not support Burien and Department of Ecology's regional effort to treat
stormwater impacting Miller Creek. 
This is not the recommended alternative 
Alternative 2 - Authorize execution of an ILA with the City of Burien providing a mechanism to
fund stormwater trunk line relocation off of the Lora Lake Apartment site. 
Cost Implications: Up to a maximum of $278,000 
Pros: 
(1) Eliminates the need to manage stormwater entering the site during the remediation
project 
(2) Eliminates possibility of recontamination of the Lora Lake Parcel of the cleanup site
and inherent liabilities 
(3) Enhances the redevelopment potential of the Apartments Parcel. 
(4) Supports Burien and Department of Ecology's regional effort to treat stormwater
impacting Miller Creek, and enhances water quality in Miller Creek. 
Cons: 
(1) Burien relocation must occur prior to remediation. 
This is the recommended alternative. 
ATTACHMENTS TO THIS REQUEST 
Interlocal agreement between the Port of Seattle and City of Burien for relocation of
stormwater line. 
PREVIOUS COMMISSION ACTIONS OR BRIEFINGS 
September 13, 2016  The Port Commission authorized advertisement and execution of 
a major works construction contract for the environmental remediation at the Lora Lake
Apartment Site and Lora Lake Property with a total project cost of $24,300,000, and
increase the Environmental Reserve Liability by $4,800,000.

Revised March 28, 2016  pjw

COMMISSION AGENDA 
Ted Fick, Chief Executive Officer 
September 19, 2016 
Page 4 of 5 

December 8, 2015  The Port Commission authorized spending of environmental
remediation liability funds for 2016 in the amount of $13,900,000 and approved a fiveyear
spending plan of $71,700,000 for the Environmental Remediation Liability
Program for the Seaport, Real Estate, and Aviation Divisions for 2016-2020, including
the Lora Lake Apartment site. 
July 14, 2015  The Port Commission authorized execution of a revised Consent
Decree for the design and implementation of the environmental remediation for the
Lora Lake Apartments Site, design of environmental remediation at the site, and
amendment of the Floyd|Snider Service Agreement to complete additional design work
for an estimated amount of $985,000. 
December 9, 2014  The Port Commission authorized a five-year spending plan of
$64,088,000 for the Environmental Remediation Liability (ERL) Program for the
Seaport, Real Estate, and Aviation Divisions for 2015-2019; and environmental
remediation liabilities funds for 2015 in the amount of $36,804,000. $16,804,000 is
forecasted to be spent in 2015 and an amount estimated not to exceed $20,000,000 of
the remaining funds approved in the five-year plan will be obligated to be spent 2016.
The Lora Lake Apartments Property was included in that authorization request. 
September 24, 2013  The Port Commission authorized execution of a Consent Decree
for design and implementation of the environmental remediation design and preparation
of construction documents for Lora Lake Apartment Site and Lora Lake Parcel. 
December 4, 2012  The Port Commission authorized an amendment to the 2009
Agreed Order, design and preparation of construction documents and amendment of the
professional services agreement for environmental remediation at Lora Lake
Apartments to $4.4 million. 
December 4, 2012  The Port Commission authorized 2013 expenditure of $44,179,000
from Port Environmental Reserve funds, for environmental remediation including the
Lora Lake Apartments Property. 
December 6, 2011  The Port Commission authorized 2012 expenditure of $56,500,000
from Port Environmental Reserve funds, for environmental remediation including the
Lora Lake Apartments Property. 
June 9, 2009  The Port Commission authorized execution of an agreed order with
Ecology, issued under MTCA, for environmental investigation and remediation of the
Lora Lake Apartments Site. 


Revised March 28, 2016  pjw

COMMISSION AGENDA 
Ted Fick, Chief Executive Officer 
September 19, 2016 
Page 5 of 5 
May 5, 2009   The Port Commission authorized procurement of environmental
consulting services to support the Port's implementation of the Lora Lake Apartments
Property remediation. 
















Revised March 28, 2016  pjw