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30 March 2005 <br /> . AGE-NC Project No 95-0130 <br /> Page 3 of 13 <br /> Appendix B The purged ground water was transferred to the ground water remediation system <br /> 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, MW-5 through MW-8, <br /> VW-1C,VW-2A and VW-3A utilizing a dedicated polyethylene tubing and poured directly into the <br /> 40-m1 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 /> 23 LABORATORY ANALYSIS OF GROUND WATER SAMPLES <br /> Each round water sample was logged on a chain of custody form laced in a chilled container <br /> g P gg Y >P 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(DIPS),ethyl tert butyl ether(ETBE)and tent amyl methyl ether(TAME)by <br /> EPA Method 8260B <br /> 2 4 QUARTERLY GROUND WATER MONITORING FINDINGS <br /> Ground water elevation, flow direction and gradient were determined from field data collected on <br /> 03 December 2004 The contaminant impact to ground water was quantified by laboratory analysis <br /> of water samples <br /> I2 4 1 GROUND WATER ELEVATION AND GRADIENT <br /> The measured depths to ground water from the purged wells were between 44 73 and 46 04 feet <br /> below the top of the well casings Ground water elevations were calculated to be between 29 15 <br /> • (MW-8) feet and 29 82 (MW-6B) feet below mean sea level (MSL) Generally, ground water <br /> Advanced GeoEnvironmental,Inc <br /> I <br />