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1 <br />' 28 October 2005 <br /> AGE-NC Protect No 95-0130 <br />' Page 3 of 13 <br />' 3/8-inch diameter,length-discrete polyethylene hose equipped with a ball-valve water tip through the <br /> specific water-charged screened section A Watera Hydro-Lift 11 pump equipped with a mechanical <br /> arm was utilized to surge the polyethylene hose Temperature,pH and conductivity were measured <br />' for stabilization at regular purge-volume intervals from each well using the Oakton water analyzer <br /> Field data and logs are in Appendix B The purged ground water was transferred to the interim <br /> ground water pump-treat remediation system holding tank for treatment and disposal <br /> I <br /> 2 2 GROUND WATER SAMPLING <br /> Ground water samples were collected from wells MW-1, MW-2, MW-3, MW-5 through MW-8, <br /> VW-1 C,VW-2A and VW-3A utilizing a dedicated polyethylene tubing and poured directly into 40- <br /> ml EPA-approved volatile organic analysis (VOA) vials containing 0 5 ml 18% hydrochloric acid <br /> as a sample preservative Care was taken to ensure that visible air bubbles were not present in the <br /> vials after filling and capping Ground water sample containers were labeled with the well <br />' designation, date, time, and sampler's initials <br /> I • 2 3 LABORATORY ANALYSIS OF GROUND WATER SAMPLES <br />' Each ground water sample was logged on a chain of custody form, placed in a chilled container and <br /> transported to Cal Tech Environmental Laboratories (CTEL), a California Department of Health <br /> Services (DHS)-certified laboratory for analysis for <br />' • Total petroleum hydrocarbons quantified as gasoline (TPH-g) by EPA Method 8015M and <br /> • Benzene, toluene, ethylbenzene and xylenes (BTEX), 1,2-Dichloroethane (1,2-DCA), <br />' ethylene dibromide (EDB),methyl-tertiary butyl ether(MTBE),tertiary butanol (TBA), di- <br /> isopropyl ether(DIPE),ethyl tert butyl ether(ETBE)and tert amyl methyl ether(TAME)by <br /> EPA Method 8260B <br /> I <br /> I24 QUARTERLY GROUND WATER MONITORING FINDINGS <br /> Ground water elevation, flow direction and gradient were determined from field data collected on <br /> I 06 June 2005 The contaminant impact to ground water was quantified by laboratory analysis of <br /> water samples <br /> I <br /> • <br /> Advanced GeoEnvironmemai,Im, <br />