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' 19 July 2002 <br /> AGE-NC Project No 95-0173 <br />' Page 2 of 8 <br />' Field data and logs are Included in Appendix A Purged ground water was containerized in 55-gallon <br /> drums and was stored on-site in an area lacking general public access <br /> 2 2 GROUND WATER SAMPLING <br /> Following well purging, ground water levels in the wells achieved a minimum of 80 percent recharge <br /> prior to sample collection Subsequently, ground water samples were collected from the purged wells <br /> utilizing new, disposable polyethylene bailers and transferred Into 40-m1 EPA-approved VOA vials <br /> containing 0 5 ml 18% hydrochloric acid as a sample preservative Care was taken to ensure that <br /> visible air bubbles were not present in the vials after filling and capping Ground water sample <br /> containers were labeled with the well designation, date, time, and sampler's initials <br /> 2 3 LABORATORY ANALYSIS OF GROUND WATER SAMPLES <br /> After labeling, each ground water sample was togged on a chain-of-custody form, placed in a chilled <br /> I container and transported to a California Department of Health Services (DHS)-certified laboratory <br /> to be analyzed for <br /> I • Total petroleum hydrocarbons quantified as gasoline (TPH-g) by EPA Methods <br /> 5030/8015M, <br /> • Benzene, toluene, ethylbenzene and xylene(BTEX) and methyl tertiary-butyl ether(MTBE) <br /> by EPA Method 8020, and <br /> • Tertiary butanol (TBA), di-isopropyl ether (DIPE), ethyl tert butyl ether (ETBE), by EPA <br /> Method 8260 Modified <br />' Due to an oversight, 1,2-dichloroethane (1,2-DCA) and 1,2-dibromoethane (DB) were not analyzed <br /> this quarter <br /> 1A a-1llii i7 ♦ TAT T�TTT ♦ 11TiAATliAT•C17TiT ♦iT RT 1 T/1T 7[ TTTT <br /> J.11. 3V1L V Hr"Im it 111 ILL ll 1 ll.l1\/llr-�711 U I-111C arHl«ii, a i a i i.1Vl <br /> Between 31 December 2001 and 29 March 2002 (first quarter), SVE remediation was in continual <br /> operation at the site, utilizing a Solleco Ecat 250 catalytic converter vapor extraction system to apply <br /> an induced vacuum to wells VW-1 through VW-7, during this time,IAS remediation also continued, <br /> with air sparging through wells MW-I through MW-3 and AW-1 through AW-7 SVE and IAS <br /> IAdvanced GeoEnvironmental,Inc <br />