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' 10 December 2001 • AGE NC Project No 95-0143 ' Page 8 of 10 3 2 3 Extracted Water Sampling Procedures Approximately 11,150 gallons of purged water were generated during the aquifer ground water ' pumping test Following the pumping test, a grab ground water sample was collected from the 20,000 gallon Baker tank using a new, clean, plastic disposable bailer The sample was transferred into three 40-m1 EPA-approved VOA vials containing 0 5 ml 18% hydrochloric acid as a sample ' preservative Following sample collection, the preserved sample was logged on a chain.-of-custody form, placed in a chilled container and transported to MAI for the following analyses • TPH-g by EPA Method 8015M, and 9 BTEX and MTBE by EPA Method 8020 3 2 4 Extracted Water Analytical Results '• The grab ground water sample contained TPH-g at a concentration of 120,000 fig/l BTEX compounds were detected in the sample at concentrations of 4,000 gg/I benzene, 26,000 gg/l ' toluene, 2,200 4g/l ethylbenzene and 19,000 gg/I xylenes Laboratory results are summarized on Table 3 The laboratory report (MAI Lab ID 72391) and chain.-of-custody forms are presented in Appendix L 3 2 5 Extracted Ground Water Disposal On 02 August 2001, the ground water extracted during the pumping test was pumped from the aboveground storage Baker tank into a vacuum truck(supplied by American Valley Waste Oil),the purged water was transported off-site under a hazardous waste manifest to Industrial Service Oil Co Inc , a waste treatment facility located in Los Angeles, California Documentation and uniform hazardous waste manifests for disposal of the pump test extracted water is contained in Appendix M 4.0. SUMMARY AND CONCLUSIONS The implications from the two aquifer ground water pumping tests are Ile During the 24-hour constant pumping rate(8 gpm)test, groundwater draw-down of at least IAdvanced GeoEnvironmentai,Inc