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06 November 2002 <br /> AGE-NC Project No 98-0432 <br /> Page 4of8 <br />' Prior to initiation of the test, the depth-to-ground water was measured in extraction well EW-1 and <br /> in the monitoring wells using a Solmst water level meter After depth measurements, 7/8-inch <br /> diameter,model 3001 Solmst Levelogger pressure transducers were deployed in wells EW-1,MW-1, <br />' MW-3 and MW-9 Each pressure transducer was pre-programed prior to the pumping test to log <br /> water levels at one-minute intervals <br /> 3 2 EXTRACTED WATER SAMPLING PROCEDURES <br />' During the pumping test,three grab ground water samples were collected prior to discharge into the <br /> 4,000-gallon tanks, the three samples were collected at 4 15 pm (sample 06-12-02), 11 15am <br /> (sample 06-13-02) and at the termination of the test at 11 15 am (sample 06-14-02) The samples <br />' were collected in three 40-m1 EPA-approved volatile organic analysis(VOA)vials containing 0 5 ml <br /> 18% hydrochloric acid as a sample preservative and one 1-liter amber bottle Following sample <br /> collection, each preserved sample was properly labeled, logged on a chain-of-custody form,placed <br />' in a chilled container and transported to a California Department of Health Services(DHS)-certified <br /> laboratory for analysis for <br /> - TPH-g and TPH-d by EPA Method 8015 Modified, <br /> BTEX and MTBE by EPA Method 8021 and <br /> - Fuel additive compounds DIPE,ETBE,MTBE, TAME, TBA,methanol, ethanol, EDB and <br /> 1,2-DCA in accordance with EPA Method 8260 Modified <br /> I <br /> 33 EXTRACTED GROUND WATER DISPOSAL <br />' On 13 and 14 June 2002 the ground water extracted during the pumping tests was pumped from the <br />' aboveground storage tank into a vacuum truck(supplied by American Valley Waste Oil),the purged <br /> water was transported off-site under non-hazardous waste manifest to Central Valley Water <br /> Recovery Co Inc , a waste treatment facility located in Riverbank, California Documentation and <br />' uniform hazardous waste manifest for disposal of the pump test purged water is contained in <br /> Appendix F <br />' 4.0. FINDINGS <br /> The subsurface soil profile,ground water aquifer characteristics and aquifer response underlying the <br /> site was characterized from field data Contaminant impact to soil and ground water samples was <br /> assessed by laboratory analysis <br /> Advanced GeoEnviron mental,Inc <br />