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• Cumulative Table of Well Data and Analytical Results Vertical Measurements are In feet Analytical results are In parts per billion(ppb) a Groundapt - - DATE Head Water To Notes TPH- Benzene Toluene Ethyl- Xylene MTBE Elev Elev Water Gasoline Benzene 490217 06/27/94 265 -1395 1660 -- 90 09 0 5 05 ND -- 09/29/94 2 65 -1511 1776 -- 64 ND 0 7 ND 06 -- 12/08/94 265 -1466 1731 -- 55 0 6 <0 5 <0 5 <0 5 -- 03/08/95 2 65 -1233 1498 90 <0 5 <0 5 <0 5 <0 5 -- 06/01/95 265 -1092 1357 -- <50 <0 5 <0 5 <0 5 <0 5 -- 09/11/95 265 -1285 1550 -- 100 <0 5 <0 5 <0 5 <0 5 -- 12/05/95 265 -1325 1590 -- 110 <0 5 <0 5 <0 5 <0 5 -- 03/18/96 2 65 -897 11 62 -- <50 <0 5 <0 5 <0 5 <0 5 -- 06/18/96 265 -9 21 11 86 -- <50 <0 5 <0 5 <0 5 <0 5 <5 0 09/24/96 265 -9 21 11 86 -- 2200 21 <0 5 2 6 <0 5 1500 12/04/96 265 -11 00 1365 -- 1200 3 0 <1 0 <1 0 <1 0 2500 02/25/97 2 65 -670 9 35 - 120 <0 5 <0 5 <0 5 <0 5 1200 05/06/97 265 -748 1013 -- <50 <0 5 <0 5 <0 5 <0 5 3500 09/29/97 265 -1023 1211 -- <1000 <10 <10 <10 <10 1700 11/25/97 265 -1011 1276 91 <0 5 <0 5 <0 5 <0 5 1600- 03/26/98 600-03/26/98 265 -3 95 660 ""` <50 53 <0 5 <0 5 <0 5 520-C' x-10 tr� %2 60) #10 02/25/97 -- -- -- -- <50 <0 5 <0 5 <0 5 <0 5 <5 0 06/18/97 -- -- -- <50 <0 5 <0 5 <0 5 <0 5 <5 0 09/29197 -- -- -- -- <50 <0 5 <0 5 <0 5 <0 5 <5 0 11/25/97 -- - -- "" <50 <0 5 <0 5 <0 5 <0 5 <2 5 03/26/98 -- - - "" <50 <0 5 <0 5 <0 5 <0 5 <2 5 `10 p C't sz/w MTBE and TAME by EPA 8260 were detected with respective values of 2100 and 65 ppb Ethanol,t-Butanol, DIPE;and ETBE by EPA 8260 and Methanol by EPA 8020 were not detected,see lab report for detection limits " MTBE, Ethanol,t-Butanol, DIPS.TAME and ETBE by EPA 8260 and Methanol by EPA 8020 were not detected,see lab report for detection limits See Table of Additional Analyses Blaine Tech Services,Inc 980326-G-1 tst-Q 1998 Monitoring at Chevron 9-4275 2905 W Benjamin Holt Dr,Stockton,CA 13