HomeMy WebLinkAboutC_No Action Engineer Letter
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November 12, 2019
Jill Ding
City of Renton
Community and Economic Development
1055 S. Grady Way
Renton, WA 98057
SUBJECT: ENVIRONMENTAL REMEDIATION CERTIFICATION FOR OCCUPANCY
601 MONSTER ROAD SW BUILDING/LUA18-000237
Dear Ms. Ding:
This letter fulfills Mitigation Measure #3 in the Environmental (SEPA) Determination of Non -
Significance – Mitigated (DNS-M) for the 601 Monster Road project.
Mitigation Measure #3 calls for Prologis to provide a No Further Action (or equivalent) letter from
the Voluntary Cleanup Program (VCP) of the Washington State Department of Ecology (Ecology)
confirming compliance with the Model Toxics Control Act (MTCA) and any other applicable
cleanup law, prior to any occupancy of this site and prior to the issuance of a Temporary or Final
Certificate of Occupancy.
Prologis is remediating the site as an independent action under Ecology’s VCP. Under this
process, Ecology review and issuance of a No Further Action determination for the Site will not
occur until after completion of at least 1 year of groundwater monitoring following site
remediation. This Ecology review will occur after occupancy of the new building at the property.
My certification of the environmental remediation is submitted as an equivalent letter to fulfill
Mitigation Measure #3.
As a Professional Engineer in Washington State, I am overseeing this cleanup action. I certify that
the 601 Monster Road property is being remediated in full compliance with MTCA and other
applicable cleanup laws. The “Prologis-Monster Road Site – Soil and Groundwater Remediation”
action has been completed in accordance with plans, specifications, and permit requirements.
Confirmation samples were collected from the sidewall and bottom of the excavation as
required, and final analytical results confirmed that applicable soil cleanup levels required by
MTCA were reached in all areas of the excavation. Notification of completion of the Soil and
Groundwater Remediation was provided to City of Renton on May 16, 2019.
Following the excavation and backfill, a heavy duty vapor intrusion barrier designed to prevent
potential transmission of volatile organic compounds was installed as a precautionary measure
over the excavated area and other areas where new building slab is being installed.
Jill Ding, City of Renton
November 12, 2019
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I certify that there are no conditions related to site contamination that would affect safe
occupancy of the new building on the property.
Sincerely,
Kate Snider, PE
Principal
2020