Ecology invites you to review and comment on the periodic review for the Pacific Car & Foundry
site located at 1400 N 4th St, Renton, WA 98057.
The Pacific Car & Foundry Site is an approximately 82-acre industrial property owned by PACCAR Inc. The property is currently occupied by a truck plant. Soil cleanup actions were conducted in the 1990s, including stabilization of contaminated soils.
A periodic review is conducted every five years after a cleanup action when institutional controls are used as part of the remedy. The purpose of the periodic review is to evaluate current site conditions and to ensure continued protection of human health and the environment.
The 2021 Periodic Review concluded (see document for complete details):
- The remedy appears to have significantly reduced impacts to groundwater, but groundwater cleanup levels (CULs) for arsenic and vinyl chloride have not been achieved in all compliance wells at the conditional points of compliance. Monitoring must continue as long as contaminants are present above CULs. The cleanup action is considered an interim action until CULs are met at the conditional point of compliance. Therefore, the periodic review fails at this time. However, the remedy continues to be protective of human health and the environment with regards to preventing exposure to contaminated soils via ingestion and direct contact.
- Arsenic exceeds the groundwater hot spot action level (HSAL), which is set at the Maximum Contaminant Level (MCL), in compliance wells LW-9S and MW-3I. Therefore, the cause of the elevated arsenic in groundwater needs to be evaluated per the Contingency Plan.
- Surface water CULs for copper, hexavalent chromium, lead, and zinc have not been consistently achieved in stormwater sampling locations SW-3, SW-5, and SW-6 at the conditional point of compliance. Monitoring must continue as long as contaminants are present above CULs. The cause of the elevated metals in stormwater needs to be evaluated per the Contingency Plan.
- The 1994 amended consent decree required PACCAR Inc. to record an amended Restrictive Covenant with the King County Auditor’s Office, but a recorded copy could not be found. A recorded copy of the amended Restrictive Covenant needs to be provided to Ecology.
Ecology will review comments received during the comment period and make recommendations for suggested changes. The periodic review will become final if no significant changes are made.
Please note that this comment form is for the purpose of submitting a comment to Ecology. Commenter contact information is optional. Contact information is necessary if you want to receive future notices or responses related to this topic.