Laserfiche WebLink
' 26 April 2002 <br /> AGE-NC Project No 95-0173 <br /> Page 2 of 8 <br /> for stabilization at regular purge-volume intervals using either an Oakton or a Hydac water analyzer <br />' Field data and logs are Included in Appendix A Purged groundwater 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 /> tFollowing well purging,ground water levels in the wells achieved a minimum of 80 percent recharge <br /> prior to sample collection except for wells MW-11 and MW-13 which had been purged "dry" <br />' Ground water samples were collected from the purged wells utilizing new,disposable polyethylene <br /> bailers and transferred into 40-m1 EPA-approved VOA vials containing 0 5 ml 18% hydrochloric <br /> acid as a sample preservative Care was taken to ensure that visible air bubbles were not present in <br />' the vials after filling and capping Ground water sample containers were labeled with the well <br /> designation, date, time, and sampler's initials <br /> 2 3 LABORATORY ANALYSIS OF GROUND WATER SAMPLES <br /> lie After labeling,each ground water sample was logged on a chain-of-custody form,placed in a chilled <br /> container and transported to a California Department of Health Services (DHS)-certified laboratory <br /> to be analyzed for <br />' Total petroleum hydrocarbons quantified as gasoline (TPH-g) by EPA Methods <br /> 1 Y <br /> P5030/8015M, <br /> • Benzene,toluene,ethylbenzene and xylene(BTEX)and methyl tertiary-butyl ether(MTBE) <br /> by EPA Method 8020, and <br /> • The fuel additives tertiary butanol (TBA), di-isopropyl ether (RIPE), ethyl tert butyl ether <br /> (ETBE), tert amyl methyl ether (TAME) and MTBE by EPA Method 8260 Modified, 1,2- <br /> dichloroethane (1,2-DCA) and ethylene dibromide (EDB)by EPA Method 8260 <br /> z n CnT7 v e vni2 FXTR A C T1QN/1N_STTT T ATR SPARGE SYSTEM <br /> J•v• i..svaJu • •a+ v��a. <br /> Between 01 October and 31 December 2001 (fourth quarter 2001), SVE remediation was in <br /> continual operation at the site, utilizing a Solleco Ecat 250 catalytic converter vapor extraction <br /> system to apply an induced vacuum to wells VW-1 through VW-7,during this time,IAS remediation <br /> also continued, with air sparging through wells MW-1 through MW-3 and AW-1 through AW-7 <br /> tSVE and IAS procedures for the site were described in the AGE-prepared Remedial Action Work <br /> • Plan dated 30 December 1998, and approved by the SJCEHD by letter dated 20 April 1999 <br /> Advanced CeoEnvironmental,Inc <br />