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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_ Well rounDepth oto DATE Head Water To Notes TPH Benzene Toluene Ethyl- Xylene TPH- MTBE EPA 1,2-DCA Phenol Oil& Cr Ca Pb Ni Zn Elev Elev Water Gasoline Benzene Diesel 8270 Grease MW-1 03/23/95 1038 -23 22 3360 - - -- -- - -- - 05/26/95 1038 -21 91 3229 340 67 <0 5 11 7 2 170* - - 79 14 <5000 44 -- 15 59 110 08/15/95 1038 -21 40 31 78 57 12 <0 5 079 067 54* - - 5 8 <5 0 <5000 150 9 2 150 260 11/16/95 1038 -2047 3085 - 4900 750 <12 100 150 650` - 17 8 3 <5000 <10 -- <100 <50 20 02/27/96 1038 -19 06 2944 -- 1200 130 <2 5 45 28 500* -- 17 <5 0 <5000 <10 <100 <50 33 05/15/96 1038 -1748 2786 240 3 8 <0 5 21 <0 5 -- 19 -- -- -- -- -- - -- -- 06/19/96 10 38 -1703 2741 -- -- -- -- -- 350* -- <5 0-<10 15 <5 0 <5000 <10 <100 <50 20 08122/96 1038 -1668 2706 - 3500 590 <10 <10 270 1800* 510 *" 33 43 <5000 <10 <100 <50 17 11/25/96 1038 -1627 2665 6400 800 <10 140 550 1300* 110 <5 0-<10 81 12 7900 <10 -- <100 <50 35 05/19/97 1038 -13 56 2394 -- 8600 WOO <20 420 430 1600* 1900 *" 49 32 <5000 <10 - <100 <50 210 08/21/97 1038 -1420 24 58 - 5900 1100 <10 340 330 1000* 1300 ***' 44 9 3 <5000 <10 -- <100 <50 120 11/17/97 1038 -1517 2555 5000 780 <10 180 150 1400* 1300 + 14 77 17,000 <10 - <5 0 <50 35 11/17/97 1038 -1517 2555 EPA 8260 ++ -- -- -- -- -- -- 1800 -- -- -- -- -- -- -- -- -- 02/09/98 10 3B -2205 3243 620 110 1 8 15 23 130* 280 <5 0-<10 8 2 <5 0 <5000 <10 -- <100 <50 85 05/21/98 1038 -919 1957 - <50 <0 5 <0 5 <0 5 <0 5 500' 41 <5 0-<10 <0 5 <5 0 <5000 <10 -- <100 <50 180 05121/98 1038 -919 1957 EPA 8260 ++ -- -- - -- -- -- 4 9 -- -- -- -- -- -- -- -- 08/11/98 -08/11/98 1038 -9 00 1938 1200 71 4 5 2 0 79 1000* 300 " 47 <5 0 5500 <10 -- <50 <50 270 11/09/98 1038 -1014 2052 -- 2400 420 <10 12 30 600* 7000 +++ 47 <5 0 <5000 <10 - <5 0 <50 150 02/17/99 i 0 38 -927 1965 -- 87 <0 5 0 77 0 6 <0 5 220* 80 <10-<50 096 -- <5000 <10 <10 <5 0 <30 43 7 05/25/99 10 38 -874 i9 12 - <50 <0 5 <0 5 <0 5 <0 5 140* 210 <5 0-<50 2 9 <5 0 <1000 <10 <10 <20 10 140 08/18/99 W 38 -9 81 2019 - 198 11 5 638 911 182 359 1560 -- 3 41 -- <5000 <10 <10 <100 <50 113 08/27/99 1038 -1013 20 51 - -- -- -- -- -- AA -- <5 0-<10 -- <5 0 -- -- Chromatogram pattern indicates an unidentified hydrocarbon "*2-Methylnaphtalene and Naphthalene were 8 7 and 33 ppb respectively 2-Methylnaphtalene and Naphthalene were 8 7 and 50 ppb respectively **** Naphthalene was detected at 34 ppb +2-Methylnaphtalene and Naphthalene were 5 3 and 35 ppb respectively ++Ethanal,t-Butanol, DIPE,TAME and ETBE by EPA 8260 were not detected,see lab report for detection limits +++Naphthalene was detected at 6 8 ppb ADiethylphthalate was detected at 6 9 ppb ^A Due to laboratory error, TPH-Diesel was not analyzed Blaine Tech Services,Inc 990818 X 1 3rd-0 1999 Monitoring at Chevron 9-2033 508 W Charter Way,Stockton,CA 1