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1 <br /> I <br /> proposed an "extended purge" or limited groundwater extraction of the affected wells. This <br /> may result in the reduction of the remaining residual petroleum hydrocarbons in the <br /> groundwater. <br /> GeoAudit proposes to extract groundwater from MW-1, MW-4 and MW-5. Initially, <br /> approximately 300 to 500 gallons of water will be removed from MW-1. After completing <br /> the limited pumping of MW-1, approximately 100 gallons of water each will be removed <br /> ' from MW-4 and MW-5. Extracted groundwater will be stored on-site in an above ground <br /> "Baker" tank. After sampling, the extracted groundwater will be disposed in an appropriate <br /> manner. <br /> After pumping is completed,water samples will be collected from MW-1, MW-4 and MW-5. <br /> All samples will be collected using disposable plastic bailers. Each water sample will be <br /> ' placed in EPA vials and 1-liter amber bottles and stored on ice. The samples will be <br /> transported under chain-of-custody to a state-certified laboratory for analysis. Samples will <br /> ' be analyzed for TPH.as gasoline and diesel and BTE&X in accordance with EPA methods <br /> 80151n and 602. The results will be summarized in the next quarterly report. <br /> ' It is our understanding that the Manna Pro facility, located to the south of the site, has <br /> recently completed an aquifer pump test. GeoAudit is currently researching the Manna Pro <br /> site. Information generated from the Manna Pro aquifer test will be assumed to be true for <br /> the subject site. Therefore, a full scale pump test is not needed for the Western Lift site. <br /> 4.0 PROCEDURES <br /> To complete the proposed scope of work, the following procedures will be performed: <br /> t1 Notification of the PHS/EHD at least 48-hours prior to initiation of the limited <br /> groundwater extraction. <br /> ' re static water level in each well prior to groundwater extraction. <br /> 2} Measure P <br /> 3) A submersible pump will be used to remove approximately 300 to 500 gallons of <br /> water from MW-1. An average pumping rate of one (1) gallon per minute is <br /> expected. <br /> 3) Measure temperature, pH and conductivity in extracted groundwater (initial 50 <br /> gallons) to document well stabilization. <br /> 4) Store all extracted groundwater in a temporary above-ground (Baker type) storage <br /> tank. <br /> 5) Decontaminated submersible pump.Use submersible pump to remove approximately <br /> W"dA.-PA41.100"LM 2 <br /> I <br />