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• Tab Summary of Ground WaterN9 Analyses and M Former Mobil Oil Bulk Plant 04-343 500 Bast Grantline Road Tracy,California Well Date of Casing Depth to Ground TPH-G TPH-D Benzene Toluene Ethyl- Total Fecal Lead Phenol Diethyl2-HEX lab ID Sampling Elevation Water Water (ppb) (ppb) (ppb) (ppb) benzene Xylenes oolofomt (ppb) (ppb) Phthalate (ppb) (fast) (feet) Elevation (ppb) (ppb) (ppb) (ppb) Tsai AW-1 10!02190 32.57 11.65 21.32 ND<50 ND<50 ND<0.3 ND<0.3 ND<0.3 ND<0.3 NDQ2 ND<10 - --- - AEL 11121190 - - - - - - - - 11 - - -- Paas 02/06/91 11.48 21.49 ND<50 ND<200 ND<0.5 ND<0.5 ND<0.5 ND<0.5 NDQ ND<500 - - - AEL 05107/91 31.54 11.37 20.17 ND<50 ND<50 ND<0.3 ND<0.3 ND<0.3 ND<0.3 NDQ - - - _. SAL 08/21/91 11.28 2026 ND<30 ND<50 ND<0.30 ND<0.30 ND<0.30 ND<0.30 - - - -- - SEQ 11126181 11.90 19.64 ND40 480 ND<0.30 ND<0.30 ND<0.30 ND<0.30 -- - - - - SEQ 02121192 11.64 19.90 ND40 ND<50 ND<0.30 ND<0.30 ND<0.30 ND<0.30 -- - - - - SEQ 04107192 32.96 11.85 21.11 ND<30 ND<50 ND<0.30 ND<0.30 ND<0.30 ND<0.30 - -- - - - SEQ 04124192 11.84 21.12 ND40 ND<50 ND<0.30 ND<0.30 ND<0.30 ND<0.30 --- - - - - SEQ 0720192 11.86 21.10 ND<50 N0<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 -- - - - - SEQ 10121192 11.94 21.02 ND<50 ND<50 ND<0.6 ND<0.5 ND<0.5 ND<0.5 - - .- - -- SEQ 0122193 1129 21.67 ND<50 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 -- - NDQ.0 NDQ.O ND<5.0 SEQ f 04/02193 11.61 21.35 ND<50 ND<50 ND<0.6 ND<0.5 ND<0.5 ND<0.5 - --- - - ..-- sea 0527193 11.62 21.34 ND<50 ND<50 ND<0.5 ND<0,5 ND<0.5 ND<0.5 - - - - SEQ AW-2 10/02190 33.16 11.37 21.79 NDa50 ND<50 ND<0.3 ND<0.3 ND<0.3 ND<0.3 - ND<10 - - AEL 02106191 11.30 21.86 ND<50 ND000 ND<0.5 ND<0.5 ND<0.5 ND4.5 - ND<500 - --- - AEL 05/07191 32.68 10.94 21.74 ND<50 ND<50 ND<0.3 ND<0.3 ND<0.3 ND4.3 - - - SAL 08121191 10.96 21.72 ND<30 ND<50 ND4.30 ND<0.30 ND<0.30 ND<0.30 - -- - - - SEQ 11x26191 11.53 21.15 ND40 99 ND<0.30 ND<0.30 ND<0.30 ND<0.30 - - --. - -- SEQ 02/21192 11.10 21.58 ND40 ND<50 ND<0.30 ND<0.30 ND<0.30 ND<0.30 - -•- - - - SEQ 04107192 33.18 11.41 21.77 ND<30 ND<50 ND<0.30 ND<0.30 NN0.30 NDc0.30 - - --- - -- SEQ 0424192 11.40 21.78 NN30 ND<60 ND<0.30 ND<0.30 ND<0.30 ND<0.30 - - - - - SEQ 07/20192 11.50 21.68 ND<50 ND<50 ND<0.6 ND<0.5 ND<0.5 ND4.5 - - - - - SEQ 10121192 11.61 21.57 ND<50 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 - - - - - SEQ 0122193 10.66 22.62 ND<50 ND<50 ND<0.5 ND<0.5 ND<0.6 ND<0.5 - - NDQ.0 MOLD ND<S.0 SEQ 04102193 11.06 22.12 ND<50 ND<W ND<0.5 ND<0.5 ND<0.5 ND<0.5 - - - - - SEQ 0527193 11.16 1 22.03 1 ND<50 I ND<50 I ND<0.5 I ND<0.5 I ND<0.5 I ND<0.5 - - -- - - SEQ NOTES: ppb - Pens per billion WA Top of casing elevations were surveyed In reference to a raboad spike set in an TPH-G a total petroleum hydrocarbons as gasoline Island on the approximate centerline of East Grantline Road 19.5 feet west kora the T 3H-D = lotal petroleum hydrocarbons as diesel centerline of the railroad spur tracks. ND a not detected at delection limits stated In ofkW laboratory reports A I wells resurveyed on AprH 7,1992 by Land IrrprovementServices.Apr#7,and 24, not mdln easureot analyzedlnot applicable 1992 data reflect resurveyed elevatlons. 2,-HEX a 2-Nexen-1-d(E) ' • sample reported as not matdring typical gaadne pattern a sampled reported as not appearing tD contain gasoline AEL = Amedcan Environmental Laboratories,Ina 4 SAT. = Superior Analytical laboratories,Inc. SEQ = Sequoia Analytical Page 1 of 5 30-IM W TABLE sn.roa