Location: Michigan

As part of the sale of a former gas station property, BLDI was retained to implement a corrective action plan with a stipulated 90 day completion schedule. BLDI was retained on Day 10 of the 90 day completion window.

The key cleanup issue was the continued presence of gasoline constituents in soil above soil saturation (Csat) and volatilization to indoor air inhalation criteria. These concentrations require corrective action per State of Michigan closure requirements and contractual obligations.

The purchaser and their consultant emphasized the need to excavate soil to a depth of 40 feet along a state urban highway with fiber optic immediately adjacent to the subject excavation. BLDI developed supporting documentation to support the selected corrective action of enhanced soil vapor extraction (SVE) using alternating extraction and injection points would be more effective and timely in achieving the desired cleanup goals. The enhanced SVE system used a double blower system including the use of air pre-heated to approximately 140 degrees F. The soil met the cleanup goal within the stipulated completion deadline.

At the same time, BLDI developed data which supported approval of the claim under the insurance policy for the underground storage tank system.

BLDI submitted documentation to the State of Michigan and received the requested no further action letter within two weeks of submittal.

MDEQ audited the closure and approved closure of all environmental media that was completed in 2007.

Project Category:
Environmental Engineering