SITE INFORMATION AND CORRESPONDENCE

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f EXECUTIVE SUMMARY This document summarizes the Final Remediation Plan for two former underground fuel storage tank sites.located on the property at the western extreme of West Weber Avenue in Stockton, California. The remediation is being conducted by ERM-West, Inc. on behalf of Catellus Development Corporation and under the supervision of the Environmental Health Division of San Joaquin County Public Health Services. Ia 3, The remedial activities address two specific site locations at the ij following addresses on the West Weber prop • 1515 West Weber Avenue: Former Tank Site #1; and • 1325 West Weber Avenue: Former Tank,'§ite 42. Underground fuel storage tanks were removed from both sites and, releases of petroleum products from the underground storage tanks were detected. The extent of the constituents in soil and ground water has been characterized at both sites. a For site soils, the remedial alternative is ov erez'cavation and on-site aeration of hydrocarbon-containing soils. The soil remediation process will encompass the following steps: ' excavation; excavation confirmation sampling; excavation backfilling; soil aeration; and aeration confirmation sampling. No excavation will be conducted beneath the buildings. An attempt will be made to collect soil samples from beneath the buildings in areas where the affected soils appear to t extend below the building to determine the mass of residual hydrocarbons present beneath the building (if any is present). For ground water, the remedial alternative I entails the extraction of a fixed volume of hydrocarbon-containing ground water from both sites, aeration of the extracted water, and discharge)to the sewer. If necessary, the extracted ground water may first be polished with liquid-phase activated carbon prior to discharge to the sewer. x ii .a