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1 <br />' 20 March 2006 <br /> .; AGE-NC Project No 95-0130 <br />' Page 4 of 13 <br /> data and logs are in Appendix A The purged ground water was transferred to the interim ground <br />' water pump-treat remediation system holding tank for treatment and disposal <br />' 2 2 GROUND WATER SAMPLING <br />' Ground water samples were collected from wells MW-1,MW-2,MW-3,and MW-5 through MW-8 <br /> utilizing a dedicated polyethylene tubing and poured directly into the 40-m1 EPA-approved volatile <br /> organic analysis (VOA) vials containing 0 5 ml 18% hydrochloric acid as a sample preservative <br /> Care was taken to ensure that visible air bubbles were not present in the vials after filling and <br /> capping Ground water sample containers were labeled with the well designation, date, time, and <br /> sampler's initials <br /> Ground water samples were collected for VW-1C, VW-2A and VW-3A at independent sampling <br /> ports located near the pump-and-treat holding tank, each SVE well was allowed to be operational <br /> for at least 30 minutes prior to collecting samples directly into the sample containers <br /> 23 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 />' 24 QUARTERLY GROUND WATER MONITORING FINDINGS <br /> Ground water elevation, flow direction and gradient were determined from field data collected on <br />' 06 December 2005 The contaminant impact to ground water was quantified by laboratory analysis <br /> of water samples <br /> 2 4 1 GROUND WATER ELEVATION AND GRADIENT <br /> • <br /> Advanced GeoEavironmental,Inc <br />