Success Story #72

Homes of Merritt (Soil and Groundwater Impact, UST Program):

Briefly, EI was retained by the client to take over an assessment/remediation project connected with a release of petroleum from a leaking underground storage tank (LUST). Prior consultants had determined the secondary source soils were inaccessible and that there was free phase petroleum present on the groundwater. EI reassessed the available data, and based on that review implemented a two phased remedial approach. The first phase removed the secondary source soils and free-phase petroleum through excavation. Prior site studies had incorrectly identified contaminants in "rock", and were therefore not amenable to excavation. Our assessments showed these materials to be partially weather rock, and by utilizing a larger excavator, were removed. These activities cleared the way for the installation of an air sparge/soil vapor extraction system (AS/SVE). Approximately six months after system start-up, dissolved phase hydrocarbon concentrations have been reduced by 98 to 99%.

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