Laserfiche WebLink
Air Sparging Pilot Test Related Activities Report and Remedial Action Work Plan <br />Former Countryside Market, Stockton, California April 30, 2015 <br />1.0 INTRODUCTION <br />On behalf of the California Regional Water Quality Control Board (CRWQCB) and the Department <br />of General Services (DGS), The Source Group, Inc. (SGI) has prepared this Air Sparging Pilot Test <br />Related Activities Report and Remedial Action Work Plan (Report) for the Former Countryside <br />Market located at 10848 Copperopolis Road, Stockton, California, referred to as Emergency <br />Abandonment and Recalcitrant (EAR) Site No. R10-129 (Site, Figure 1). This Report has been <br />completed to detail well installation activities for air sparging (AS) feasibility test, AS results, and <br />propose a final remedial action plan (RAP) that will best cleanup petroleum hydrocarbons within <br />the former underground storage tank (UST) area. Well installation and pilot testing activities were <br />completed as proposed in SGI's Feasibility Study and Interim Remedial Action Plan (IRAP) (SGI, <br />2013c), which was approved by the CRWQCB in correspondence dated January 22, 2014 <br />(Appendix A). The proposed remedial approach and design presented in this Report is generally <br />consistent with the strategy presented in the IRAP, which also included a conceptual site model, an <br />evaluation of remedial technologies, and proposed feasibility testing. A summary of field activities, <br />test results, and remedial action work plan is presented in the following sections. <br />The scope of work included: <br />Pre-mobilization activities including procurement and contracting, agency coordination, <br />permitting, and utility clearances; <br />Installation of one observation well, one vapor well and two AS test wells, including soil <br />sampling and well development; <br />Completion of two separate AS pilot tests over two days, which included groundwater and <br />soil vapor sampling; <br />Evaluation of test data, and preparation of this summary/pilot test report; and, <br />Engineering evaluation and preparation of recommended remedial well construction and <br />well layout. <br />1.1 Report Organization <br />The remainder of this document is organized into the following sections: <br />Section 2.0: Background and Physical Setting <br />This section presents a summary of the Site setting, including a brief description of the local <br />hydrogeologic conditions and previous investigation activities. <br />Section 3.0: Well Installation Activities <br />This section presents a summary of well installation activities at the Site, including pre-mobilization <br />activities, soil sampling and analytical results. <br />1-1 The Source Group, Inc.