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TABLE 1 GROUNDWATER EXTRACTION SYSTEM ANALYTICAL DATA Former Chevron Service Station 9-5775 301 West Kettleman Lane Lodi, California TPHg = Total Petroleum Hydrocarbons as Gasoline 1,2 -DCA= 1,2-Dichloroethane MtBEw Methyl tertiary butyl ether TBA = tort -Butyl -alcohol EDB = Ethylene dibromide DIPE = Di -isopropyl ether EtBE = Ethyl tertiary butyl ether TAME = Tertiary amyl methyl ether NA = Not analyzed for this constituent ND = Not Detected or below method detection limits 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. Sequoia Analytical (ELAP #1271, #1624 and #12360) Kiff Analytical ( ELAP #2236) Lancaster Laboratories (ELAP # 2116) Sample collected after approximately 1,500 gallons of tap water were pumped through system during cleaning procedures. Tatrahydrofuran reported as ND (<5.0). Sample collected for Qualatative analysis (Kiff Analytical) ---sample collected for Qualatative analysis (Lancaster Laboratories) Influent sample collected on May 6, 2003, not submitted for chemical analvsis. I:1Chevron1957751TableslGWE-Monthly.xls 12 of 12 04/03/02 EFFL <50 <0.5 <0.5 <0.5 <0.5 <0.5 <5.0 <0.5 <0.5 <0.5 <50 <200 <0.5 04/09/02 EFFL <50 <0.5 <0.5 <0.5 <0.5 <0.5 <5.0 <0.5 <0.5 <0.5 <50 <200 <0.5 <0.5 <0.5 04/19/02 EFFL <50 <0.5 <0.5 <0.5 <0.5 <0.5 <5.0 <0.5 <0.5 <0.5 <50 <200 <0.5 <0.5 04/23/02 EFFL <50 <0.5 <0.5 <0.5 <0.5 <0.5 <5.0 <0.5 <0.5 <0.5 <50 <200 <0.5 <0.5 04/30/02 EFFL <50 <0.5 <0.5 <0.5 <0.5 <0.5 <5.0 <0.5 <0.5 <0.5 <50 <200 <0.5 <0.5 05/07/02 EFFL <50 <0.5 <0.5 <0.5 <0.5 <0.5 <5.0 <0.5 <0.5 <0.5 <5.0 <50 <0.5 <0.5 05/14/02 EFFL <50 <0.5 <0.5 <0.5 <0.5 <0.5 <5,0 <0.5 <0.5 <0.5 <5.0 <50 <0.5 <0.5 05/21/02 EFFL <50 <0.5 <0.5 <0.5 <0.5 <0.5 <5.0 <0.5 <0.5 <0.5 <5.0 <50 <0.5 <0.5 05/29/02 EFFL <50 <0.5 <0.5 <0.5 <0.5 <0.5 <5.0 <0.5 <0.5 <0.5 <5.0 <50 <0.5 <0.5 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 <50 <0.5 <0.5 06/11/02 EFFL <50 <0.5 0.60 <0.5 <0.5 <0.5 <5.0 <0.5 <0.5 <0.5 <5,0 <50 <0.5 <0.5 06/18/02 EFFL <50 <0.5 <0.50 <0.5 <0.5 <0.5 <5.0 <0.5 <0.5 <0.5 <5.0 <50 <0.5 <0.5 06/25/02 EFFL <50 <0.5 4.50 <0.5 <0.5 <0.5 <5.0 <0.5 <0.5 <0.5 <5.0 <50 <0.5 <0.5 07/02/02 EFFL <100 <2.0 <2.0 <2.0 <2.0 <2.0 <10 <2.0 <2.0 <2.0 <50 <100 <2.0 <2.0 07/16/02 EFFL <100 <2.0 <2.0 <2.0 <2.0 <2.0 <10 <2A <2,0 <2.0 <50 <100 <2.0 <2.0 07/30/02 EFFL <50. <2. <2. <2. <2. <2. <10. <2. <2. <2. <100. <400. <2. <2. 08/13/02 EFFL <100, <2. <2. <2. <2. <2. <10. <2. <2. <2. <100. <400. <2. <2. 08/28/02 EFFL <100, <2. <2. <2. <2. <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. 124102 EFFL <50. <2, <2. <2. <2. <2. <10. <2. <2. <2. <100. <400. <2. <2. 38/02 EFFL <100. <2. <2. <2. <2. <2. <10. <2. <2. <2. <100. <400. <2. <2. _..22/02 EFFL <100. <2. <2. <2. <2. <2. <10. <2. <2. <2. <100. <400. <2. <2. 11/05/02 EFFL <50. <0.5 <0.5 <0.5 <0.5 <2. <10. <2. <2. <2. <100. <400. <2. <2. 11/20/02 EFFL <50. <2. <2. <2. <2. <2. <10. <2. <2. <2. <100. <400, <2. <2. 12/03/02 EFFL <100. <2. <2. <2. <2. <2. <10, <2. <2. <2. <100. <400. <2. <2. 12/17/02 EFFL <50. <2. <2. <2. <2. <2. <10. <2. <2. <2. <100, <400. <2. <2. 01/07/03 EFFL <100. <2. <2. <2. <2. <2. <10. <2. <2. <2. <100. <400. <2. <2. 01/21/03 EFFL <100, <2. <2. <2. <2. <2. <10. <2. <2. <2. <100. <400. <2. <2. 02/04/03 EFFL <100. <2. <2. <2. <2. <2. <10. <2. <2. <2. <100. <400. <2. <2. 02/19/03 EFFL <100. <2. <2. <2. <2. <2. <10. <2. <2. <2. <100. <400, <2. <2. 03/05/03 EFFL <50. <2. <2. <2. <2. <2. <10. <2. <2. <2. <100. <400. <2. <2. 03/18/03 EFFL <50. <2. <2. <2. <2. <2. <10. <2. <2. <2. <100. <400. <2. <2. 04/01/03 EFFL <50. <2. <2. <2. <2. <2. <10. <2. <2, <2. <100. <400. <2. <2. 04/15/03 EFFL <50. <2. <2. <2. <2. <2. <10. <2. <2. <2. <100, <400. <2. <2. 05/06/03 EFFL <50. <0.5 <0.5 <0.5 <0.5 <0.5 <5. <0.5 <0.5 <0.5 <50. <400. <0.5 <0.5 05/20/03 1 EFFL <50, <2. <2. <2. <2. <2. <10. <2. <2. <2. <100. <400. <2. <2. )ischar a Limitation ND <5.01 <5.01 <5.01 <5.01 ND ND I ND ND ND ND I ND I ND ND TPHg = Total Petroleum Hydrocarbons as Gasoline 1,2 -DCA= 1,2-Dichloroethane MtBEw Methyl tertiary butyl ether TBA = tort -Butyl -alcohol EDB = Ethylene dibromide DIPE = Di -isopropyl ether EtBE = Ethyl tertiary butyl ether TAME = Tertiary amyl methyl ether NA = Not analyzed for this constituent ND = Not Detected or below method detection limits 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. Sequoia Analytical (ELAP #1271, #1624 and #12360) Kiff Analytical ( ELAP #2236) Lancaster Laboratories (ELAP # 2116) Sample collected after approximately 1,500 gallons of tap water were pumped through system during cleaning procedures. Tatrahydrofuran reported as ND (<5.0). Sample collected for Qualatative analysis (Kiff Analytical) ---sample collected for Qualatative analysis (Lancaster Laboratories) Influent sample collected on May 6, 2003, not submitted for chemical analvsis. I:1Chevron1957751TableslGWE-Monthly.xls 12 of 12