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TABLE GROUNDWATER EXTRACTION AND TREATMENT SYSTEM ANALYTICAL DATA Former Chevron Service Station #9-5775 301 West Kettleman Lane Lodi, Califomia Sample Sample TPHg Benzene Toluene Ethyl- Total MtBE TBA DIPE EtBE TAME Ethanol Methanol EDB 1,2 -DCA Date Location l benzene Xylenes 1 ] { l 1 06106/01 )effluent <50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <0.50 <0.50 <0.50 <5.0 <50 <0.50 <0.50 06/13/01 Effluent <50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <0.50 <0.50 <0.50 <5.0 <50 <0.50 <0.50 06/20/01 Effluent <50 <0.50 <0.50 <d.SQ <0-50 <0.50 <5.0 <0.50 <0.50 <0.50 <5.0 <50 <0.50 <0.50 06/27/01 Effluent <50 <0.50 <0.50 <0.50 <0.50 <0.50 <5.0 <0.50 <0.50 <0.50 <5.0 <50 <0.50 <0.50 Discharge Limitation I ND <5.01 <5.0' 1 <5.0' <5.0' ND ND ND ND ND I --- --- ---- ---- EXPLANATIONS: ANALYTICAL LABORATORIES TPHS - Total Petroleum Hydrocarbons as Gasoline DiPE - Di -isopropyl ether Sequoia Analytical (ELAP # 1271, # 1624 and #12360) 1,2 -DCA - 1,2-Dichloroethane ELBE - Ethyl tertiary butyl ether KiffAnalytical ( FLAP #2236) MtBE- Methyl tertiary butyl ether TAME - Tertiary amyl methyl ether TBA - tert-Butyl-alcohol NA R Not analyzed for this constituent EAB - Ethylene dibromide ND - Not Detected or below method detection limits NOTES: ' Sum of benzene, toluene, ehtylbenzene and xylenes not to exceed 0.005 mglL (5 ppb). Sample collected after approximately 1,400 gallons of tap water was pumped through system during cleaning procedures. Sample included 2-butanaone and tetrahydrofu m which were quantified as TPHg. Sample collected after approximately 1,500 gallons ortap water were pumped through em during cleaning procedures. Tetrahydroruran reported as ND (<5.0). • .7 077.43452.57olGWEdw xls Page a of a