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Cumulative Table of Well a and Analytical Results Vertical Measurements are in feet Analytical results are In parts per billion(ppb) Ig Well Ground Depth DATE Head Water To Notes TPH- Benzene Toluene Ethyl- Xylene MTBE ; ' Elev Elev Water Gasoline Benzene MW-8 01/18/94 1 18 -1484 1602 -- 51 ND ND ND ND - 06/27/94 1 18 -1415 1533 -- ND ND ND ND ND -- 09/29/94 1 18 -1537 16 55 -- ND ND ND ND ND -- 12/08/94 1 18 -1502 1620 Anomalous 110* 35 <0 5 <0 5 <0 5 i 01131!95 1 18 -1352 1470 Anomalous 140* <0 5 <0 5 <0 5 <0 5 -- 03/08/95 1 18 -1280 1398 -- 70 <0 5 <0 5 <0 5 0 7 -- 06/01/95 1 18 -11 23 1241 -- 220 09 <0 5 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 45N - 380 5 0 1 2 0 9 <0 5 03/18/96 1 18 -9 54 1072 -- 920 4 5 <0 5 13 <0 5 -- 06/18/96 1 18 -11 60 1278 - 230 <0 5 <0 5 <0 5 <0 5 11 I 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 a 02/25/97 1 18 -690 808 - 200 <0 5 <0 5 <0 5 0 8 13 05/06/97 1 18 -7 80 8 98 - 90 <0 5 <0 5 <0 5 <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 11 66 ** 170 35 <0 5 <0 5 <0 5 '** 03/26/98 1 18 -396 514 ** <50 <0 5 <0 5 <0 5 <0 5 <2 5 06/24/98 1 18 -594 7 12 ** <50 <0 5 <0 5 <0 5 <0 5 <2 5 09/10/98 1 18 -789 907 -- <50 <0 5 <0 5 <0 5 <0 5 <2 5 12/17/98 1 18 -774 8 92 -- <50 <0 5 <0 5 <0 5 <0 5 <2 5 03/10/99 1 18 -592 7 10 I, -- <50 <0 5 <0 5 <0 5 <0 5 <2 5 06/22/99 1 18 -631 749 - <50 <0 5 <0 5 <0 5 <0 5 <2 0 I 11 3 r F, 7 II , '�I *Hydrocarbons were found in the range of gasoline,but do not resemble a gasoline fingerprint **See Table of Additional Analyses M No value for MTBE could be determined,see lab report F yy1 ' k T f Blaine Tech Services, Inc 990622-R-1 2nd-Q 1999 Monitoring at Chevron 9-4275 2905 W Benjamin Holt Dr,Stockton,CA 14