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1 <br /> • Collect an influent and effluent vapor sample after approximately 15 minutes of operation <br />' for laboratory analysis of TPHgBTEX and oxygenates by EPA method TO-14 (Samples <br /> to Sun Star) <br /> • Collect an influent sample at the end of the test for laboratory analysis of TPHgBTEX <br /> 1and oxygenates by EPA method TO-14 (Samples to Sun Star) <br /> • Vapor extract for one to two hours Continue operation as long as possible until field <br /> readings stabilize or a maximum of four hours <br /> • Shut down blower and call Modesto <br /> LONG TERM VAPOR EXTRACTION TEST <br /> September 19 2003 <br />' The purpose of the vapor extraction test is to determine the radius of influence A long term <br /> VET will, be performed using well VE3 VET will be performed the second day <br /> Pre-test Procedures <br /> • Measure depth-to-water in extraction well (VE3) and all observation wells (VE2, VE1, <br /> MW3, 4, 2, 6, 1, and 9) <br /> • At extraction wellhead VE3, install PVC riser and all piping to connect to blower <br /> • Install pitot tube, gauges, temperature gauge, etc for monitoring influent stream <br /> • Install monitoring caps on all observation wells, hookup magnehelic gauges set to zero <br /> • Record vacuum or pressure readings at all monitoring points prior to testing <br /> Vapor Extraction Test Procedures <br /> j * Start up blower, initiate vapor extraction at low flow and step up flow rate/vacuum <br /> throughout the test at 30 to 60 minute intervals if possible <br />' • Monitor flow, temperature, influent and effluent concentrations with PID, vacuum, and <br /> pressure for extraction and observation wells at 15 minute intervals <br /> • Monitor response in observation wells at 15-minute intervals <br />' • Check knockout drum regularly, empty as needed Reduce/flow vacuum if pulling to <br /> much water <br /> • Collect an influent and effluent vapor sample after approxnnately 15 minutes of operation <br />' for laboratory analysis of TPHgBTEX and oxygenates by EPA method TO-14 (Samples <br /> to Sun Star) <br />' • Collect an influent sample at the end of the test for laboratory analysis of TPHgBTEX <br /> and oxygenates by EPA method TO-14 (Samples to Sun Star) <br /> • Vapor extract for two to four hours Continue operation as long as possible until field <br />' readings stabilize or a maximum of six hours <br /> • Shut down blower and call Modesto <br /> • Pack up equipment and secure site <br /> AFLORES/GREER/VETPILOT DOC <br /> r <br />