Location: Eastern Michigan

A client purchased a business which conducted vapor degreasing and metal finishing. During the removal of a small underground storage tank (UST) at this facility, a release from a UST containing listed hazardous waste was documented.

The UST was found to be connected to the drains from the vapor degreasing area. MDEQ requested that soil samples be analyzed for the presence of chlorinated solvents. Chlorinated solvents were found to be present at concentrations above applicable criteria.

Further investigation defined an area of impacted soil to extend from the former UST excavation zone under the building and also toward a private street. Groundwater was found only in the former excavation zone as perched infiltration water.

Subsequently, BLDI supported a successful cost recovery against the former owner of the property as well as developed documentation to support the implementation of a limited remedial action plan (RAP).

After successful resolution of technical issues with MDEQ, the RAP was implemented. The remedy utilized soil vapor extraction of the permeable soils and a groundwater removal and treatment process to address perched water. The concrete floor inside the building and a designed landscaping provided an engineering control.

The remedial system was operated for a period of less than two years. At the end of the period the soil and groundwater concentrations met the cleanup criteria provided in the RAP and the system was shutdown.

BLDI developed data and met with the client and purchaser to integrate the RAP into the sale of the facility. Annual inspection and maintenance of the engineering control is on-going.

Project Category:
Environmental Engineering
Environmental Due Diligence