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. A S S D C I A T E S I N C <br /> with an air sparge test conducted on vapor well VW-2d The locations of these wells are shown on <br /> Figure 2 <br /> Ung Term Va or Extraction Test <br /> Vapor we VW-1 Il be used as the extraction well for the long term vapor extraction test VW-1 is <br /> located between former tank numbers 1, 2, and 3 number 4 and is screened from 15 to 30 feet <br /> below ground surface (bgs) Vapor well VW-2s, -2d, VW-4, VW-5s, and VW-5d and <br /> groundwater wells MW-1, MW-3, and RW-1 wi a used as observation wells The IC engine will be <br /> operated on VW-1 fo two to f'�our��ho��ur��s,+ while the chap a in induced vacuum response at the <br /> observation wells is mora arm ee exl�action flow rate w�e adjusted until the maximurn-flowtie, <br /> and applied vacuum can be determined After the IC engine has operaeed for 15 minutes,6 influent <br /> ec <br /> vapor sample will be collected for laboratory analysis A sond sampl� will also be collected for <br /> laboratory analysis after the IC engine has operated for 90 minutes, as well as eflluen apor sample <br /> from the IC engine A photoionization detector (PID) will be used to monitor petroleum hydrocarbon <br /> vapor concentrations from the extraction well during the vapor test and during vapor sampling <br /> Air Sparge Test---, \ <br /> Vapor well VW-2d 11 be used as the air sparge well for the air sparge test VW-2d is located <br /> adjacent to�fo r tank number 3 Vapor ells VW-1, VW-2s,,VW4, VW-5s, and VW-5d and <br /> groundwater well MW-1, MW-3, and 1-W-1 will be used as observation wells Pnor to beginning the <br /> air sparge test, a vapor and groundwater sample will be collected from wells VW-2d and VW-3 to <br /> establish baseline concentrations A 5 horsepower regenerative will be operated on VW-2d for <br /> two hours as the blower injects air and helium into the well Helium used as a tracer in the <br /> grain water to aid in the determination of an elective radius o i e Helium concentrations <br /> will be measured in the observation wells with a helium detecto After the test is completed, vapor and <br /> groundwater samples will be collected from well VW-2d an VW to evaluate the reduction or <br /> increase in petroleum hydrocarbon concentrations rk <br /> � UAB I <br /> Short Term Vapor Extraction Test in Coniunction With Air S ar a Test <br /> A short term vapor extraction test will be con in conjunction with an air sparge test using well <br /> -5 as the vapor extraction well and w l VW-2d the air sparge well The remaining wells will <br /> be used as observation wells This test performed to collect additional data to assist in <br /> determining the effective radius of influence, and to determine the petroleum hydrocarbon <br /> concentrations extracted from these wells The IC engine will be operated on well VW-5s and the <br /> blower will be operated on well VW-2d for 30 minutes Induced vacuum changes will be monitored in <br /> the observation wells After 30 minutes of operation a vapor and groundwater sample will be collected <br /> from well VW-5s for laboratory analysis <br /> w 162574162574 011943671veswkp doc 3 <br />