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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) Wolf roupDepth -- Iota DATE Head Water To Notes TPH- Benzene Toluene Ethyl- Xylene TPH- MTBE EPA 1,2-DCA Phenol Oil& Cr Pb Nl Zn Elev Elev Water Gasoline Benzene Diesel 8270 Grease MW-1 --- 03/23/95 1038 -2322 3360 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 05/26/95 10 38 - -21 91 3229 -- 340 67 <0 5 11 72 170` -- -- 7 9 14 <5000 44 15 59 110 08115/95 1038 -21 40 31 78 -- 57 12 <0 5 079 067 54' -- -- 58 <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 -1906 29 44 -- 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 1038 -1703 2741 -- -- -- -- -- 350' --<5 0-<10 15 <5 0 <5000 <10 <100 <50 20 08/22/96 1038 -1668 2706 -- 3500 590 <10 <10 270 1800' 510 33 43 <5000 <10 <100 <50 17 11/25/96 1038 -1627 2665 84QO 800 <10 140 550 13Q0' 110<50-<10 81 12 7900 <10 <100 <50' 35 05/19/97 1038 -13 56 23 94 -- 8600 1700 <20 420 430 1600" 1900 "'" 49 32 <5000 <10 <100 <50 210 08/21/97 1038 -1420 2458 -- 5900 1100 <10 340 330 1000' 1300 "" 44 9 3 <5000 <10 <100 <50 120 11/17/97 1038 -1517 25 55 -- 5000 780 <10 180 150 1400' 1300 + 14 77 17,000 <10 <50 <50 35 11/17/97 1038 -1517 25 55 EPA 8260++ -- -- -- -- -- 1800 -- -- -- -- -- -- -- -- 02/09/98 1038 -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` 4 1 <5 0-<10 <0 5 <5 0 <5000 <10 <100 <50 180 05/21/98 1038 -919 1957 EPA 8260++ -- -- -- -- -- -- 4 9 -- -- -- -- -- -- -- -- 08/11/98 1038 -9 00 1938 -- 1200 71 4 5 2 0 79 1000" 300 ^ 47 <5 0 5500 <10 <5 0 <50 270 11/09/98 1038 -1014 2052 2400 420 <10 12 30 600' 7000 +++ 47 <5 0 <5000 <10 <50 <50 150 ' Chromatogram pattern indicates an unidentlied 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 ++Ethanol,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 ^Diethylphthalate was detected at 6 9 ppb I I I Blame Tach Services,Inc 981109-T-2 4th-0 1098 Monitoring at Chevron 9-2033 508 W Charter Way,Stockton,CA 1