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II FROM GETTLER-RYAN INC . PHONE NO . 916 631 1317 Nov . 13 1998 04 : 18PM P3 ! - i� TABLE 2 . GROUNDWATER CHEMICAL ANALYTICAL DATA Chevron Station #9-3232 8660 Lower Sacramento Road Stockton, California Ethyl- Total Well ID/ Date DTW GWE TPHg Benzene Toluene benzene Xylenes MTBE TOC ft Collected ft . mel WN b b b b b MW-1/ 99. 17 11 /4/98 31 . 93 67.24 1 , 100 13 < Lo 43 < 1 . 0 24/ < 2.0' MW-2/ 99.91 11 /4/98 36. 07 63 . 84 120,000 23 ,000 18,000 4,300 15,000 < L000/ < 2002 MW-3/ 99.00 11 /4/98 35 . 22 63 . 78 18,000 2,900 720 17100 29500 < 125/ < 403 Trip Blank 11 /4/98 < 50 < 0. 50 < 0. 50 < 0. 50 < 0. 50 < 2. 5 Explauatinn• TOC = Top of casing elevation Analytical lahauWry. (ft) = feet Sequoia Analytical (SLAP #1210) DTW = Depth to Water GWE = Groandwater elevation Analytical Methods msl = Measurement referc=ed relative to mean sea level TPHg/BTBX/MTBE = EPA Method 8015 Mort/8020 TPHg = Total Petroleum Hydrocarbons as gasoline BTBX = benzene, toluene , ethylbenzene, total xylenes MTBE = Methyl-tert-butyl-ether ppb = parts per billion = not applicable t MTBE result confirmed by EPA Method 8260. Sample also analyzed for the oxygenates ethanol ( < 500 ppb) , text-butanol ( < 100 ppb) , di-isopropyl ether ( < 2. 0 ppb), ethyl tert-butyl ether ( < 2.0 ppb) , tort-amyl methyl ether ( < 2. 0 ppb). 2 MTBE result confirmed by EPA Method 8260. Sample also analyzed for the oxygenates ethanol ( < 50,000 ppb), tert-butanol ( < 10,000 ppb) , rd-isopropyl ether ( < 200 ppb), ethyl text-butyl ether ( < 200 ppb) , and tert amyl ether ( < 200 ppb) . 3 MTBE result confirmed by EPA Method 8260. Sample also analyzed for the oxygenates ethanol ( < 10 ,000 ppb, tent-butanol ( < 2,000 ppb) , di-isopropyl ether ( < 40 ppb), ethyl text-butyl ether ( < 40 ppb), and tent-amyl methyl ether ( < 40 pp 346463.01