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Air Sparging Pilot Test Related Activities Report and Remedial Action Work Plan <br />Former Countryside Market, Stockton, California April 30, 2015 <br />All soil cuttings, well development groundwater, and decontamination water generated during <br />drilling and well installation will be contained and stored in U.N.-approved, 55-gallon drums for <br />appropriate disposal via a licensed waste contractor. <br />6.3.1 Soil Vapor Extraction Piping <br />SGI will install 2-inch diameter schedule-40 PVC to the proposed SVE well locations. The SVE <br />wells will be connected to a manifold within an equipment compound where they will be connected <br />to an extraction and treatment system. The preliminary design specifications for the proposed <br />system are as follows: <br />Above-grade SVE conveyance piping from wellheads to a central manifold in an equipment <br />compound; <br />20 horsepower vapor extraction blower with approximate 200 scfm flow capacity; <br />Vacuum rated knock-out tank with automated level controls, and transfer pump; <br />Vacuum—relief valve; <br />Three 3,000-pound vapor-phase granular activated carbon (GAO) vessels in-series; and <br />Alarms/shutdowns/auto-dialers/controls. <br />6.4 Permitting <br />Prior to the installation of the AS/SVE treatment system, an Authority to Construct/Permit to <br />Operate (ATC/PTO) permit will be acquired from the San Joaquin Valley Air Pollution Control <br />District (SJV-APCD). In addition, building, fire, electrical, and mechanical permits will be obtained <br />from the City of Stockton or San Joaquin County, as needed. <br />6.5 Health and Safety Activities <br />Field activities will be completed with safety as a primary concern. The existing Site-specific Health <br />and Safety Plan (HASP) will be updated to include the proposed Site activities in accordance with <br />OSHA regulations 29 CFR 1910.120. The HASP will be prepared to cover proposed Site activities, <br />including but not limited to remediation system construction, and operations and maintenance. SGI <br />personnel, as well as all other on-Site subcontractors and regulatory personnel, will be required to <br />familiarize themselves with and sign the HASP, observe the HASP-specified protocols, and identify <br />and minimize potential safety hazards. <br />6.6 System Startup <br />The proposed AS/SVE system will operate in accordance with the applicable permits and the <br />HASP. Continuous operation of the AS/SVE system (24 hours a day, 7 days a week) is planned. <br />Sparging/extraction may be temporarily discontinued at one or more wells to optimize system <br />performance (e.g., minimize stagnation zones between wells). <br />6-4 The Source Group, Inc.