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,Cv:ATC <br /> A S S O C I A T E S I N C <br /> TPHg in groundwater <br /> ' = (5,700+50)12 uq TPHg x 1 kg x 3.78 L x 5,280 gal x 24 hours <br /> 1 L Water 1,000,000,000 ug 1 gal 6.5 hours 1 day <br /> = 0.21 kg TPHq x 2.2 Ib = 0.47 pounds of TPHg removed per day <br /> day 1 kg <br /> BTEX in groundwater <br /> (1,656+3.5)/2 u BTEX x _ 1 kq x 3.78 L x 5,280 gal x 24 hours <br /> i <br /> 1 L Water 1,000,000,000 ug 1 gal 6.5 hours 1 day <br /> ' = 0.06 kq BTEX x 2.2 Ib = 0.13 pounds of BTEX removed per day <br /> day 1 kg <br /> 3_6 Treatment and Disposal of Pumping Test Generated Water <br /> On January 30 and 31, and February 1, 2002, the approximately 5,500 gallons of water extracted <br /> during the pumping test and step drawdown test was filtered through granular activated carbon <br /> and discharged to the City of Lodi sanitary sewer system. Three water samples were taken from <br /> the effluent stream of the carbon treatment system. Sample containers were then labeled with <br /> sample identification, placed on ice, and shipped under chain-of-custody to State-certified Argon <br /> Laboratories for chemical analysis of TPHg by EPA method 8015, BTEX by EPA method 8020, <br /> ' and MTBE, ETBE, DIPE, TBA, TAME, 1,2-DCA, and EDB by EPA method 8260. <br /> Groundwater analytical results are summarized in Table 2, and laboratory data sheets are <br /> ' presented in Appendix C. <br /> Following completion of the treatment of the extracted groundwater, the canisters of granular <br /> ' activated carbon used in the treatment were sampled for analysis, profiled for disposal, and <br /> transported from the site. <br /> ' 4.0 DISCUSSION <br /> The groundwater extraction pilot test yielded a pumping rate of approximately 13.54 gpm and a <br /> ' ROI of approximately 90 feet. In accordance with the removal rates calculated in Section 3.5, <br /> approximately 0.16 pounds of TPHg and BTEX were removed during the 6.5-hour groundwater <br /> pumping pilot test. Assuming that a permanent groundwater extraction pump would be installed <br /> ' in. well EW-I, the ROI would .extend beyond the southern edge of the.site beneath Kettleman <br /> Lane in the downgradient direction. Installation of a groundwater extraction and treatment <br /> ' system would likely prevent groundwater from migrating off-site. <br /> w:%259571reportslpumptest.doe 5 <br />