The former NORTAR/American Tar Company site received a ranking of 1 (highest risk) by the Washington State Department of Ecology because of the large volume of chlorinated solvents and carcinogenic polycyclic aromatic hydrocarbon (PAH)-containing coal tars and mineral spirits historically released to soil and shallow groundwater. In addition, pentachlorophenol (PCP) was confirmed in the soil; because PCP is an F-027 land-banned waste under the Resource Conservation and Recovery Act (RCRA), the high potential disposal costs were stalling future development.

To address these issues, SoundEarth personnel conducted a $1.5 million Formal Brownfield Cleanup Project under the state’s Model Toxics Control Act. Notably, SoundEarth prepared a Contained-Out proposal that received approval from Ecology, enabling off-site disposal of the contaminated soil at a RCRA Subtitle C landfill under Ecology’s Contingency Management Option. In addition, SoundEarth employees prepared a cleanup action plan, public participation plan, prospective purchaser agreement proposal, and engineering design document, as well as assisted with the negotiation of a Prospective Purchaser Agreement Consent Decree. Following implementation of the cleanup action plan, Ecology referred to the project as “one of the fastest Consent Decree cleanups in our history.” A Notice of Completion was received for soil within one week of completing the soil excavation and four quarters of groundwater monitoring. The site was delisted less than two years following project startup.

To address these issues, SoundEarth personnel conducted a $1.5 million Formal Brownfield Cleanup Project under the state’s Model Toxics Control Act. Notably, SoundEarth prepared a Contained-Out proposal that received approval from Ecology, enabling off-site disposal of the contaminated soil at a RCRA Subtitle C landfill under Ecology’s Contingency Management Option. In addition, SoundEarth employees prepared a cleanup action plan, public participation plan, Prospective Purchaser Agreement proposal, and engineering design document, as well as assisted with the negotiation of a Prospective Purchaser Agreement Consent Decree. Following implementation of the cleanup action plan, Ecology referred to the project as “one of the fastest Consent Decree cleanups in our history.” A Notice of Completion was received for soil within one week of completing the soil excavation and four quarters of groundwater monitoring. The site was delisted less than two years following project startup.