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' 19 January 2006 <br /> AGE-NC Project No 99-0592 <br />' Page 2 of 4 <br /> and logs are included in Appendix A Purged water was stored on-site in 55-gallon Department of <br />' Transportation(DOT)-approved drums pending proper 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 /> I <br /> 22 COLLECTION OF GROUND WATER SAMPLES <br />' The depth to water in monitoring well MW-4 was re-measured following purging to assure a <br /> minimum of 80% recharge prior to sampling Water samples were retrieved from each purged <br />' monitoring well using a plastic bailer To sample the domestic well, a sampling port was opened at <br /> the well head and samples were collected from the port while the pump was operating Each sample <br /> was transferred into three laboratory-supplied 40-milliliter (ml) EPA-approved volatile organic <br />' analysis (VOA) vials 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) and diesel (TPH-d) in <br /> accordance with EPA Method 8015M, and <br />' Benzene,toluene,ethylbenzene,and total xylenes(BTEX)and the fuel additives di-isopropyl <br /> ether(DIPE),ethyl tertiary-butyl ether(ETRE),methyl tertiary-butyl ether(MTBE),tertiary- <br /> amyl methyl ether (TAME), tertiary-butanol (TBA), 1,2-dibromoethane (EDB), <br /> 1,2-dichloroethane (1,2-DCA), ethanol, and methanol in accordance with EPA Method <br /> 8260B, and <br /> • At the direction of EHD Trichloroethene(TCE) and tetrachloroethene (PCE) in accordance <br /> with EPA Method 8260B <br /> 3.0. FINDINGS <br /> Ground water elevation, flow direction, and gradient were determined from field data collected on <br /> 06 September 2005 Laboratory analysis of ground water samples were used to quantify the impact <br /> to ground water <br /> • <br /> Advanced GeoEnvironmentak,Inc <br />