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1 2 Gradually increase flow until breakthrough is achieved <br />' 3 Record pressure at which flow first starts <br /> 4 increase sparge flowrate (if possible) to 4 cfrn. <br /> 5 Initiate iii ection of helium at a rate of 2 cfm at a matched pressure to the injected sparge air <br />' 6 During the test measure every 15 minutes <br /> Air flowrate, helium flowrate, and pressure at sparge well <br />' ►Depth to water in monitoring wells <br /> Soil gas samples in wells (Helium and VOCs) <br /> Pressure in observation wells <br /> 7 Sparge oror until readings stabilize Test can be re at er applied <br />' pressures <br /> �r <br /> 8 Stop test and perform the following <br />' Depth to water in all wells <br /> Collect groundwater and vapor samples from MW1 Submit groundwater samples <br /> to Sequoia for laboratory analysis of TPHgBTEX <br /> 9 Initiate vapor extraction on well Record applied vacuum and flowrate m�2 and <br /> induced vacuum, flowrate, and DTW in observation wells_ <br />' 10 After steady state conditions are achieved or 30 minutes, initiate Air Sparge <br />' 11 Monitor flow, temperature, influent and effluent concentrations with FID, vacuum, and <br /> pressure for extraction and observation wells at 15 minute intervals <br />' 12 If positive pressure responses are observed, increase the vacuum extraction. <br /> 13 Collect influent vapor sample from_-VW2 at end of test for analysis of TPHgBTEX <br />' 14 After test is completed,perform the following <br /> • Record depth-to-water at all locations <br />' 15 Samples to Sequoia Analytical(pickup at office 5 00) <br />' 16 Pack up equipment and secure site <br />