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' TABLE 3 GROUNDWATER EXTRACTION SYSTEM . ANALYTICAL DATA ' Former Chevron Service Station 9-5775 301 West Kettleman Lane Lodi, Califomia r Sample Sample TPHg Benzene Toluene Ethyl- Total MtBE TBA DIPE EtBE TAME Ethanol Methanol EDB 1,2 -DCA Date Location benzene Xylenes ( ) ( ( ) ( ( ) ( ) ( ) ( ) 06/04/02 EFFL <50 <0 5 <0 5 <0 5 <0 5 <0 5 <5 0 <05 <0 5 <05 <50 <50 <0 5 <0 5 06/11/02 EFFL <50 <0 5 060 <0 5 <0 5 <0 5 <5 0 <0 5 <0 5 <0 5 <50 <50 <0 5 <0 5 06/18/02 EFFL <50 <0 5 <0 50 <0 5 <0 5 <05 <5 0 <0 5 <0 5 <0 5 <5 0 <50 <0 5 <0 5 06/25/02 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 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 <2 0 <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 e400 <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 09/24/02 EFFL <50 <2 <2 <2 <2 <2 <10 <2 <2 <2 <100 <400 <2 <2 10/08/02 EFFL <100 <2 <2 <2 <2 <2 <10 <2 <2 <2 <100 <400 <2 <2 10/22/02 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 01/21M3 EFFL <100 <2 <2 <2 <2 <2 <10 <2 <2 <2 <100 <400 <2 <2 02104/03 EFFL <100 <2 <2 <2 <2 <2 <10 <2 <2 <2 <100 <400 <2 <2 02119103 EFFL <100 <2 <2 <2 <2 <2 <10 <2 <2 <2 <100 <400 <2 <2 0 3 EFFL <50 <2 <2 <2 <2 <2 <10 <2 <2 <2 <100 <400 <2 <2 3 EFFL <50 <2 <2 <2 <2 <2 <10 <2 <2 <2 <100 <400 <2 <2 ischar a Limitation i ND <5 0' <5 0' <5 0' <5 0' I ND I ND ND ND NO ---- I ---- -- ---- EXPLANATIONS ANALYTICAL LABORATORIES g = Total Petroleum Hydrocarbons as Gasoline DIPS = Dfisopropyl ether Sequoia Analytical (ELAP #1271 #1624 and #12360) DCA =1,2 Dichbroethane E1BE = Ethyl tertiary butyl ether Kot Analytical (ELAP #2236) MtBE= Methyl tertiary butyl ether TAME = Tertiary amyl methyl ether Lancaster Laboratories (ELAP # 2116) TBA = tert Butyl-aioohol NA = Not analyzed for this constituent B = Ethylene drbromide ND = Not Detected or below method detection limits TES Sum of benzene toluene ehtylbenzens and xylenes not to exceed 0 005 mglL (5 ppb) pie collected after approximately 1,400 gallons of tap water was pumped through system during cleaning procedures pie 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 Tetrahydrofuran reported as ND (<5 0) Split sample collected for Qualitative analysis (Kiff Analytical) pill sample collected for Qualitatnre analysis (Lancaster Laboratories) IGwe-qpr Page 12 of 12