- Asbestos Survey
- Cost Recovery and Allocation Support
- Cleanup Action Plan Development and Permitting
- Remedial Investigation
- Phase II ESA
- Pre-Purchaser Agreements
- Soil and Groundwater Characterization and Investigation
- Remedial Excavation
- UST Investigation, Decommissioning, and Remediation
EPI assisted our Client to prepare this Chevron-branded gasoline station and minimart for redevelopment into a tunnel-type car wash. Redevelopment activities included an asbestos survey, and removing existing underground storage tanks (USTs) containing fuel and associated piping and dispensing equipment. The property is in a mixed-use area of commercial and residential properties in the South Hill area of the City of Puyallup, Washington.
Concurrent with redevelopment activities, EPI conducted an interim remedial action to address petroleum impacts to soil and groundwater. These impacts resulted from historical releases of petroleum products from USTs and associated components that were removed and replaced in 1987.
The interim remedial action removed the existing USTs and excavated the petroleum-impacted soil. In 2014, EPI supervised the removal of three USTs and associated equipment. Petroleum-impacted soil was excavated and disposed off-site at a landfill. To prepare for future contingent groundwater remediation actions, a low-cost infiltration gallery was installed before the excavation was backfilled. This system could be used for different remedial options including injection of chemical media, air sparging, ozone injection, or groundwater extraction.
Prior to remedial actions, EPI prepared and submitted an interim work plan and proposal to the responsible party for pre-approval. EPI then assisted the client with invoicing and cost-recovery from the responsible party.
The property was redeveloped as a tunnel-type carwash. Groundwater monitoring wells were reinstalled after redevelopment activities were completed and EPI continues quarterly groundwater monitoring.