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F e ! !{� Cumulative Table of Well Data and Analytical Results _ Vertical Measurements are in feet Analytical results are In parts per billion(ppb) Well Ground Depth DATE Head Water To Notes TPH- Benzene Toluene Ethyl- Xylene MTBE 1! Elev Elev Water Gasoline Benzene MW=8 01/18/94 1 18 -1484 1602 - 51 ND ND NO ND -- 06/27/94 1 18 -1415 1533 NO NO ND NO ND -- 09/29/94 1 18 --1537 16 55 ' NO ND ND ND NO -- 1 12!08194 1 18 -1502 1620 Anomalous 110* 35 <05 <0 5 <0 5 -- 01/31/95 1 18 -1352 1470 Anomalous 140" <0 5 <05 <0 5 <0 5 -- 03/08/95 1 18 -1280 1398 - 70 <0 5 <05 <0 5 0 7 -- 06/01/95 1 18 -11 23 1241 - 220 0 9 <05 1 6 0 7 -- 09/11/95 1 18 -1305 1423 1000 <1 0 <1 0 4 0 <1 0 -- 12/05/95 1 18 -1327 14 45 , 380 5 0 1 2 0 9 <0 5 03/18/96 1 18 -954 1072 -- 920 4 5 <05 13 <0 5 -- 06/18/96 1 18 -11 60 1278 -- 230 <0 5 <0 5 <0 5 <0 5 11 09/24/96 1 18 -11 37 1255 -- 240 <0 5 <0 5 <0 5 <0 5 14 12/04/96 1 18 -11 04 1222 '` - 200 <0 5 <0 5 <0 5 <0 5 24 02/25/97 1 18 -6 90 8 08 - 200 <0 5 <0 5 <0 5 0 8 13 05/06/97 1 18 -780 8 98 - 90 <0 5 <0 5 <05 <0 5 18 09/29/97 1 18 -1054 11 72 370 32 0 7 <0 5 <0 5 18 11/25/97 1 18 -1048 1166 ' "" 170 35 <0 5 <0 5 <0 5 *`* 03126!98 1 18 -396 514 **'`* <50 <0 5 <0 5 <0 5 <05 <2 5 ; 06/24/98 1 18 -594 712 ***' <50 <05 <0 5 <0 5 <0 5 <2 5 r 09/10/98 1 18 -789 907 - <50 <0 5 <0 5 <0 5 <0 5 <2 5 12/17/98 1 18 -774 892 t <50 <0 5 <05 <0 5 <0 5 <2 5 I! I' i I II r I I I 11 *Hydrocarbons were found in the range of gasoline, but do not resemble a gasoline fingerprint ** MTBE by EPA 8260 was detected at 19 ppb Ethanol,t-Butanol, DIPE, TAME and ETBE by EPA 8260 and Methanol by EPA 8020 were not detected see lab report for detection limits ' *"No{Ivalue for MTBE could be determined, see lab report See Table of Additional Analyses u Blaine Tech Services Inc 981217C2 4th-Q 1998 Monitoring at Chevron 9-4275 2905 W Benjamin Holt Dr Stockton CA 13 I u i 7 t