Pajaro Valley Unified School District


A sizable groundwater plume consisting of methyl tertiary butyl ether (MtBE) was discovered while investigation a gasoline release at the Pajaro Valley School District’s maintenance yard. We assisted the district by delineating the MtBE in shallow and deep groundwater bearing zones, and by installing and operating a groundwater extraction and treatment system. The treatment system consisted of a bioreactor and series-connected carbon units. Treated groundwater was discharged to the storm drain under a National Pollution Discharge Elimination System (NPDES) permit. Importantly, we were able to secure funding for the school district from the California Underground Storage Tank (UST) Insurance Fund so that the district was reimbursed for past and current work.

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