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TABLE 3 GROUNDWATER EXTRACTION SYSTEM ANALYTICAL DATA Former Chevron Service Station 9 5775 301 West Kettleman Lane Lodi, Califomia Sample Sample TPHg Benzene Toluene Ethyl- Total, INtBE TBA Date Location benzene- Xylenes 06/04/02 EFFL <50 <0.5 <0.5 <0.5 <0.5 <0.5 <5.0 <0.5 <0.5 <0.5 <5.0 <5.0 <50 <50 <0.5 <0.5 <0.5 <0.5 06/11/02 EFFL <50 <0.5 0.60 <0.5 <0.5 <0.5 X5.0 <0.5 <0.5 <0.5 <0.5 <0.5 <5.0 <50 <0.5 c0.5 06/18/02 EFFL <50 <0.5 <0.50 <0.5 <Q,5 <0.5 <5.0 <0.5 <D.5 <0.5 <5.0 <50 <0.5 <0.5 06/25/02 EFFL <5Q <0.5 c0.50 <0.5 <0.5 <0.5 <5.0 <0.5 <2.0 <2.0 <50 <100 <2.0 <2.0 07/02/02 EFFL <100 <2.0 <2.0 <2.0 <2.0 <2,0 <10 <2.0 <2.0 <2.0 <2.Q <5D <i00 <2.0 <2.0 07/16/02 EFFL <100 <2.0 <2.0 <2.0 <2.0 <2.0 <10 <2. <2. <400. <2. <2. 07/30/02 EFFL c50. a2. <2. <2. <2. c2. <10. c2• <2• c2. <100, <400. <2. <2. 8/13/027 EFFL <100. <0.50 1.1 <0.50 <1.5 <2. <10. <z. <2. <2. <iQa. <400. <2. <2. 8128102' EFFL <100. <0.50 2.4 3.1 <1.5 <2. <10. <2. <2. <2. <100. <400. <2. <2. 09/12/02 EFFL <50. <2. <2. <2. <2. <2. <10. <2. <2. <2. <100. <400. <2. <2. 09/24/02 EFFL c50. <2• <2. <2. <2. <2. <10. <2. c2. <2. <100. <400. c2. <2. 10/08/02 EFFL <100. <2. <2. <2. <2. <2. <10. c2. <2. <2. <100. <400, <2. 10/22/02 EFFL <100. <2. <2. c2. <10. <2. <2. <2. <10Q. <400. <2. <2. 11/05/02 EFFL <50. <0.5 <0.5 <0.5 <0.5 <2. <2. <2. <1100- 11/20/02 EFFL <50. <2. <2. <2. <2. <2. <10. <10. <2. <2. c2. <100. <400. <2. <2. 12/03/02 EFFL <100. <2. <2. <2. <2. <2. <2. <2. <2. <100. <400. <2. <2. 12/17/02 EFFL <50. c2. <2. c2. <2. f2. <10. Discharge Limitation ND <5.0` <5.0 <5.0 <5.0 ND ND ND ND ---- ANALYTICAL LABORATORIES EXPLANATIONS_ Sequoia Analytical (ELAP #1271, #1624 and #12360) TPHg = Total Petroleum Hydrocarbons as Gasoline RIPE = Di -isopropyl ether Ki1f Analytical (FLAP #2238} 1 1,2-Dichloroethane Dichloertiary ELBE = Ethyl tertiary butyl ether Lancaster Laboratories (ELAP # 2116) N ,`ethyl butyl ether TAME = Tertiary amyl methyl ether TBA- lert-Butyl-alcohol NA =Not analyzed for this constituent ND = Not Detected or below method detection limits EDB = Ethylene dibromide Sum of benzene, toluene, ehtylbenzene and xylenes not to exceed 0.005 mg/L (5 ppb). Sample collected after approximately 1.400 gallons of tap water was pumped through system during cleaning procedures. Sample Included 2-butanaone and tetrahydrofuran which were quantified as TPHg. Sample collected after approximately 1,500 gallons of tap water were pumped through system during cleaning procedures. Teirahydroluran reported as ND (<5.0). Split sample collected for 4ualatative analysis (Kiff Analytical} Split sample collected for Qualatative analysis (Lancaster Laboratories) BTEX constituents analyzed by EPA 8021 B F GW Edw Page 12 of 12