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1 <br /> Ms Lori Duncan Project No 880-039 IA <br /> June 18, 2003 <br /> Page 6 <br /> VW-3S at a combined flow rate of approximately 25 cubic feet per minute (cfm) The <br /> sparge test was conducted by infecting air into the bottom of well VW-313 and then well <br />' VW-2D Helium was infected into well VW-3D during part of the test, to act as a tracer <br /> gas During the sparge test, air was injected at a rate of approximately 6 cfm at pressures <br /> of 5 to 7 pounds per square inch (psi) <br /> Data collection during the test include the following <br /> Air and helium flow rates were measured with flow meters manifolded to <br /> the injection line <br /> • Real-time vapor-phase VOC concentrations were screened in the field <br /> using a Photo Ionization Detector (PID) at the two vadose wells VW-2 and <br /> VW-3, and at the total influent port of the SVE system <br /> • Tracer gas influence in surrounding wells was measured utilizing a helium <br /> detector <br /> G Dissolved oxygen in groundwater was measured in surrounding wells at <br /> multiple points throughout the test <br /> 1 o Influent soil-vapor samples were sent to an analytical laboratory for <br /> quantification Soil-vapor samples were analyzed for TPHg by EPA <br /> Method TO-3, and for BTEX and MtBE by EPA Method TO-15 <br /> Groundwater Extraction Pump Test <br /> On April 8, 2003, Shaw conducted a groundwater extraction pump test During the test, <br /> groundwater was extracted from well MW-4RS using a submersible pump <br /> Groundwater extracted during the test was stored on-site in a portable Baker Tank <br /> Data collection during the test include the following <br /> • Groundwater flow rate was measured using a portable flow meter <br /> Groundwater levels were measured at multiple points throughout the test <br /> 1 <br /> 1IISACRFP1\COMMON1saeDP120031Prj'ZBO 8800381A 3ae doc <br />