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Work Plan For Well Installation and Feasibility Testing 4 <br /> Ranch Market Site 23569 South Santa Fe Road Riverbank California September 13 2000 <br /> supplemental fuel An air compressor will be used to conduct the air sparging portion of the <br /> test <br /> 5.1 Permitting <br /> SECOR will prepare and submit a letter of notification to the San Joaquin County Air Pollution <br /> Control District of the proposed two day soil vapor extraction/air sparging (SVE/AS) <br /> feasibility test <br /> 5.2 Pre-SVE Test Monitoring <br /> Prior to starting the SVE test the depth to water will be monitored in the six soil vapor <br /> extraction wells, one air sparge well, monitoring wells MW-1, MW-2, MW-3, and MW-4 <br /> Dissolved oxygen readings will also be collected from the wells using a down-hole dissolved <br /> oxygen meter <br /> 5.3 Soil Vapor Extraction Feasibility Test <br /> SECOR will conduct a 12-hour SVE feasibility test at the Site The six SVE wells will be <br /> plumbed into a manifold that will allow soil vapor to be extracted from a single well or all six <br /> wells at one time The manifold will allow measurement of the extracted vapor flow rate and <br /> concentration of volatile hydrocarbons from the individual extraction wells and the combined <br /> well field <br /> Soil vapor will be extracted from well V-1, V-2, and V-5 during three individual well tests <br /> lasting 3 hours and extracted from all six vapor wells for an additional 3 hours The following <br /> parameters will be monitored and recorded during the feasibility test at the noted frequency <br /> • Vacuum and extraction flowrate readings every 15 to 30 minutes, <br /> • Induced vacuum/pressure in the adjacent vapor wells as noted below, <br /> • Dissolved oxygen (DO) in the adjacent vapor wells, air sparge well, and four <br /> groundwater monitoring wells prior to termination of each of the four vapor extraction <br /> tests presented below, <br /> • The depth-to-groundwater(DTW)levels will be measured and recorded to the nearest <br /> 0 01 foot using an electronic water level indicator in wells AS-1, MW-1, MW-2, MW- <br /> 3, and MW-4 prior to termination of each of the four vapor extraction tests presented <br /> below, <br /> File Ranh Mwket\PeporWRbWdlnstal FewibihtyI WKP wpd <br />