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' 13 January 2006 <br /> AGE-NC Project No 99-0592 <br />' Page 2 of 4 <br />' disposal <br /> In addition, the on-site domestic well was purged and sampled To purge the large domestic well, <br />' a drain valve was opened on the water storage tank and the pump was allowed to cycle on and off <br /> for approximately 15 minutes <br />' 22 COLLECTION OF GROUND WATER SAMPLES <br />' The depth to water in the monitoring wells was re-measured following purging to assure a minimum <br /> of 80%recharge prior to sampling Water samples were retrieved from each purged monitoring well <br /> using a plastic bailer To sample the domestic well,a sampling port was opened at the well head and <br />' samples were collected from the port while the pump was operating Each sample was transferred <br /> into three laboratory-supplied 40-milliliter(ml)EPA-approved volatile organic analysis(VOA)vials <br /> containing 0 5 ml 18% hydrochloric acid solution as a sample preservative <br /> The samples were labeled, placed in a chilled container, and transported under chain of custody to <br /> Cal Tech Environmental Laboratories(CTEL),a California Department of Health Services (DHS)- <br /> certified analytical laboratory, for analysis The samples were analyzed for <br /> • Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA <br />' Method 8015M, and <br /> • Benzene,toluene,ethylbenzene,and total xylenes(BTEX)and the fuel additives di-isopropyl <br />' ether(DIPE),ethyl tertiary-butyl ether(ETBE),methyl tertiary-butyl ether(MTBE),tertiary- <br /> amyl methyl ether (TAME), tertiary-butanol (TBA), 1,2-dibromo ethane (EDB), <br /> 1,2-dlchloroethane (1,2-DCA), ethanol, and methanol in accordance with EPA Method <br /> 8260B, and <br /> • Trichloroethene(TCE)and tetrachloroethane(PCE)in accordance with EPA Method 8260B <br /> f <br /> 3.0. FINDINGS <br /> Ground water elevation, flow direction, and gradient were determined from field data collected <br /> on16 March 2005 Laboratory analysis of ground water samples were used to quantify the impact <br /> to ground water <br /> I <br /> IAdvanced GeoEnvironmental,Inc <br />