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hi ` 1T. 0 December 2001.. AGE'NC'Pr6jectNo.'9501-14 Page;3 of 4 � f, '�;. - - •£ ' j - . .y j. - Fig„ 2.2. • 'EXTRACTED WATER"SAMPLING PROCEDURES Approxirrlat1.ely 4,000'gallons of purged water were generated during the pump test. Duriiig'the pump. �? test;three sets of a grab samples were-collected prior to discharge'into the tank utilizing three 407mi ' EPA-approved.volatile;organic analysis (VOA) vials.containing 0.5 ml 18% hydrochloric acidras a sample preservative. The three samples were collected at 12:30 pm(4 Hour); 4:30 pm,(8 hours) and - at the termination of the test 8:30;pm.(12 hours). Following sample collection, each preserved sample was logged on a chain-of-custody' form, placed in a chilled container and transported to a California Department of Health Services (DHS)-certified , laboratory for analysis for:' Total petroleum hydrocarbons quantified as gasoline and, diesel (TPH-g and.TPH-d, respectively)by EPA Method 8015 Modified and- ; '12• Benzene, toluene, ethylbenzene and xylene (BTEX) and methyl-tertiary butyl ether (MTBE) . by EPA Method 80 20. . • Volatile organic,compounds(VOCs) -specifically fuel additives;ethylene dibromide(EDB), ' 1,2-dichloroethane (1,2-DCA), tertiary butanol(TBA), di-isopropyl ether(DIPE), ethyl tert butyl ether (ETRE), tert amyl.methyi ether (TAME), and confirmation of MTBE,by EPA -Method 8260 Modified. 2.2.1.. Extracted Water Analytical Results The results of the laboratory analysis detected TPH=ss .at a maximum concentration-of 1,200 microgramsper,liter (ug/1}. BTEX compounds were detected in the-grab ground water samples at t concentrations as high as 55 Mgll (kylene). Various VOCs.were detected. Cis-1,2-DCA and vinyl chloride were detected at'coricentrations as high-as 1.7 ggll and 1.6µg11,respectively.-The laboratory reports (McCampbell Analytical Inc. Lab I.D. 76961 'and 769.62), Quality Assurance and Quality. Control data and chain-of-custody forms are presented in Appendix F. •2.3. PURGED GROUND WATER DISPOSAL , . On 11 September 2001, the � � ound water extracted during the pumping test waspumped from the. _ aboveground storage Baker"tankinto a vacuum tnick,(supplied by American Valley Waste Oil), the. purged water was transported off site under hazardous waste manifest to Industrial Service Oil Co. ' Inc., a waste treatment facility,located. in Los'Angeles, California. Docurnentation:.and uniform Advanced GeoEnvironnienia!Inc.