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Table 1 HISTORICAL GROUNDWATER ANALYTICAL RESULTS AND MONITORING DATA • CHEVRON SERVICE STATION NO.9-0557 139 SOUTH CENTER STREET,STOCKTON,CALIFORNIA WELL ID! ETHYL- ELEVATION BENZENE .TOLUENE BENZENE XYLENES FECAL DTW. SPT V.fTE ' l (TOC_} DATE (aqb)_ (ppb) -�E 1 pbl �(pvb ppb COLIFORM feet feet feet MW-1 11.17 03/08/91 250 13 62 47 1,400. 43.89 0.00 -32;72:. 06/27/91 31 3.1 18 8.4 1,300 NO 44.17 0,00 -33.00 09/12/91 40 6.8 8.6 11.0 1,700 - 44.57 0.00 33.40 12/06/91 46 NO ND 12.0 1,700 -- 44.80 0.00 -33.63 04103/92 67 8.3 9.6 .14 1,900 140 43.451 0.00 32.28 MW-2 11.76 03/08/91 140 9.0 7 33 290 -- 44.51 0.00 -32.85 06/27/91 140 8.0 1.5 32 11800 ND 44.88 0.00: 33.12 09/12/91 140 7.8 6.7 27 2,200 - 45.33 0.00 -33.57 12/06/91 190 6.2 5.7 32 2,100 -- 45.49 0.00 : -33.73 04/03/92 430 16 6.8 57 2,500 40 44.20 0.00 -32.44 MW-3 11.78 03/08/9i 0.5 NO NO NO NO -- 44.28 0.00 -32.50 06/27/91 NO NO NO 2.5 130 -- 44.61 0.00 -32.83 09/12/91 NO NO NO 0.5 82 -- 44.98. 0.00` 33.20. 12/06/91 NO NO NO NO 85" -- 45.091 0.00 -33.31 04/03/92 NO ND NO NDI NO - 43.79 . 0.00 w32.01' MW-4 12.30 03/08/91 NO ND NO NO NO -- 44.75 0.00 -32.45 06/27/91 NO NO NO NO NO -- 45.08 0.0.0 X32,78 09/12/91 NO NO NO NO NO - 45.47 0.00 -33.17 12/06/91 NO NO NO NO NO - 45.57 0.00 =33.27 04 03 2I NDI NO , ND NQ1 ND 44.28 __Q400_L 31.98 EXPLANATION TPH-G =Total Petroleum Hydrocarbons as Gasoline(ppb) DTW= Depth to water SPT W Separate-phase hydrocarbon thickness WTE = Water table elevation TOC=Top of casing Fecal coliforms measured in organisms per 100 ml NO = Not detected at or above the minimum quantitation limit -- = Not analyzed = Non-standard gasoline pattern in chromatogram Note: See laboratory reports for minimum quantitation limits. GARTAB 1.wKt _ GROUNDWATER TECHNOLOGY