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STATE OF WASHINGTON
DEPARTMENT OF ECOLOGY
Northwest Region Office
PO Box 330316, Shoreline, WA 98133-9716 • 206-594-0000
November 9, 2023
Andrew Van Gordon, Associate Planner
Planning Division
City of Renton
1055 S Grady Way, 6th Floor
Renton, WA 98057
Re: Dreamliner LLC Mixed Use
File# LUA23-000355, Ecology SEPA# 202305189
Dear Andrew Van Gordon:
Thank you for the opportunity to provide comments on the State Environmental Policy Act
(SEPA) notice of application utilizing the optional mitigated determination of nonsignificance
(ODNS/NOA-M) process for the Dreamliner LLC Mixed Use project. Based on review of the
checklist associated with this project, the Department of Ecology (Ecology) has the following
comments:
Section B. Environmental Elements, subsection 7. Environmental Health:
The proposed project is located west of one site listed on the Model Toxics Control Act (MTCA)
Confirmed and Suspected Contaminated Sites List - SDS Partners site (cleanup site ID 9972,
facility site ID 63618514) at 307 Airport Way S. The SDS Partners site has petroleum
hydrocarbon contamination confirmed in soil and groundwater. Groundwater in this area
appears to be shallow at less than 20 feet deep.
If contaminated groundwater from the SDS Partners site has reached the proposed project
location, the project parcel will be considered part of the MTCA site. In this case, petroleum
contamination at the proposed project location should be characterized to ensure protection of
workers and future residents and mitigation of MTCA liability. The mitigation measure could
include (1) removal and proper disposal of contaminated soil and/or groundwater from the
proposed project location: (2) worker health and safety measure, including air monitoring.
EXHIBIT 9DocuSign Envelope ID: 23F4BD16-5184-4ACD-B93D-53CB9BFD13D7
Andrew Van Gordon
November 9, 2023
Page 2
Please provide potential environmental health issues and appropriate mitigation measures in
this subsection.
Thank you for considering these comments from Ecology. If you have any questions or would
like to respond to these comments, please contact Jing Song from the Toxics Cleanup Program
at (425) 229-2565 or by email at jing.song@ecy.wa.gov.
Sincerely,
Kelli Price
SEPA Coordinator
Sent by email: Andrew Van Gordon, avangordon@rentonwa.gov
Uploaded to the online comment portal
ecc: Jing Song, Ecology
DocuSign Envelope ID: 23F4BD16-5184-4ACD-B93D-53CB9BFD13D7