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r Work Plan For Well Installation and Feasibility Testing 5 Ranch Market Site,23569 South Santa Fe Road Riverbank,California September 13 2000 • Contaminant concentration in extracted vapor stream using a flame ionization detector (FID) at the air treatment inlet (pre-dilution) approximately every 30 minutes and contaminant concentrations in the air treatment outlet port approximately every 60 minutes, • Lower explosive levels (LELs) in extracted vapor stream using an LEL meter at the air treatment inlet (pre-dilution) approximately every 60 minutes, and, • Vapor samples will be collected from the extracted vapor prior to the air treatment inlet (pre-dilution) prior to termination of each of the four vapor extraction tests presented below, • The samples will be submitted to a California-certified laboratory for the analysis of TPHg, BTEX, and MTBE by EPA Method 8260B . A total of four separate soil vapor extraction tests are detailed below S VE Test#1 3 hour Vapor Extraction Test Using Well V-2 Induced Vacuum Monitoring Points- V-4 distance from V-2 is 10 feet V-3 distance from V-2 is 15 feet V-1 distance from V-2 is 20 feet V-5 distance from V-2 is 24 feet V-6 distance from V-2 is 40 feet The Extraction flow rate and influent FID readings will be collected from V-2 every 15 to 30 minutes One influent soil vapor sample, VE-V-2, will be collected prior to termination of the test SVE Test#2 3 hour Vapor Extraction Test Using Well V-1 Induced Vacuum Monitoring Points- V-5 and V-2 distance from V-1 is 20 feet V-4 distance from V-1 is 25 feet V-6 distance from V-1 is 30 feet V-3 distance from V-1 is 35 feet 51e Rwt h MwketlReponslRb-Wellinstal FrasibtLtyl WICP wpd