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30.0136-01 Table 1 Summary of Results of Ground Water Sampling Former Mobil oil Bulk Plant 03-343 500 East Grantline Road, Tracy, California Concentrations in parts per billion (ppb) sass:sassassss:::sasssssssssasassssszssssssssezzszzsssassascsassssssssssssscsas:zsauusssssssassasssassssssss:ac::zscssssssssssssssszsaszzsssasazsz WELL DATE OF CASING DEPTH GROUND TPN-D TPH-G B. T E X FC Pb LAB 10 SAMPLING/ ELEVATION TO WATER MONITORING WATER ELEVATION zazazzesszsasssassss:azss�sxxszsssaesasssszes�ss�sssasserssssssszsszszssassaszsssasssaaassssssszzszsssesssszssassssssssessesszsssesasassssszssssz I AW-1 10/02/90 32.97 11.65 21.32 ND40 ND40 ND<0.3 ND<0.3 ND<0.3 NO<0.3 ND<2.2 ND<10 AEL AW-1 11/21/90 32.97 --- --- --- --- -._ ... --- --- 11 --- PACE AW-1 02/06/91 :52.97 11.48 21.49 ND<200 ND<50 ND<0.5 ND<0.5 N0<0.5 ND<0.5 NO<20 ND<SOO AEL AW-1 05/07/91 :51.54 11.37 20.17 ND<50 ND<50 NO<0.3 ND<O.3 ND<0.3 ND<0.3 MDQ* --- SAL AW-1 08/21/91 31.54 11.28 20.26 ND<50 ND<30 ND<0.30 ND40.30 ND<0.30 ND<0.30 --- --- SEC AW-1 11/26/91 31.54 11.90 19.64 480 ND<30 ND<0.30 ND<0.30 NO<0.30 ND<0.30 --- --- SEC AW-1 02/21/92 :51.54 11.64 19.90 ND<50 ND<30 ND<0.30 ND<0.30 ND<0.30 ND<0.30 --- •-• SEC Alf-2 10/02/90 :53.16 11.37 21.79 ND<50 ND<50 NDco.3 ND<O.3 N0<0.3 ND<0.3 --- MDC 10 AEL AW-2 02/06/91 :53.16 11.30 21.86 ND<200 ND-c50 ND<0.5 ND<0.5 ND-K0.5 ND<O.5 --- ND400 AEL AW-2 05/07/91 52.68 10.94 21.74 ND<50 ND<50 ND-c0.3 NDcO.3 N94.3 N0<0.3 --- --- SAL A11-2 08/21/91 :52.b8 10.96 21.72 ND<50 ND<30 NDc0.30 ND<0.30 ND<0.30 NDcO.30 -•- --- SEC AW-2 11/26/91 32.68 11.53 21.15 99 ND<30 ND<0.30 ND40.30 ND<0.30 ND<0.30 --- --- SEQ AW-2 02/21/92 :52.68 11.10 21.58 ND<50 ND<30 ND<0.30 ND<0.30 ND<0.30 ND<0.30 --- --- SEQ I { Alf-3 10/02/90 32.62 11.42 21.20 10000 4200 0.5 3.5 4.9 21 ND<2.2 ND<10 AEL AW-3 11/21/90 32.62 --- - - ... --- --- --- N0<2 PACE AW-3 02/06/91 32.62 11.73 20.89 9800** ND<300 NO Q.5 ND<2.5 ND<2.5 ND<5.0 NOQ0 ND<500 AEL AW-3 05/07/91 32.18 11.14 21.04 NDc50 210*** NO<0.3 ND<0.3 0.3 0.8 ND<2* --- SAL AW-3 08/21/91 32.18 11.05 21.13 22000*** 620*** ND<0.60*** ND<0.60*** ND<0.60*** 0.70*** --- --- SEC AW-3 11/26/91 32.18 11.67 20.51 2600 610 ND<0.30 ND0.30 ND<0.30 0.48 --- --- SEQ AV-3 02/21/92 32.18 11.37 20.81 ND<50 ND<30 ND<0.30 ND<0.30 ND<0.30 ND<0.30 --- --- SER AW-4 10/02/90 32.67 10.99 21.68 ND<50 ND450 NO-0.3 ND<0.3 ND<0.3 ND<O.3 --- ND<10 AEL AW-4 02/06/91 32.67 10.86 21.81 ND<200 ND<50 ND<0.5 ND4.5 NOcO.5 NO<O.5 --- ND<500 AEL AW-4 05/07/91 :52.76 10.54 22.22 ND<50 ND<50 ND<0.3 ND-c0.3 ND<0.3 ND<0.3 --- --- SAL AW-4 08/21/91 32.76 10.60 22.16 MD-60 ND<30 ND<0.30 ND<0.30 ND<0.30 ND<o.30 --- --- SEQ AW-4 11/26/91 32.76 11.14 21.62 100 ND<30 ND<0.30 ND<0.30 ND<0.30 ND<0.30 --- --- SEQ AW-4 02/21/92 32.76 10.69 22.07 ND<50 NO-00 ND<0.30 ND<0.30 ND4.30 ND<0.30 --- --- SEC AW-5 05/07/91 30.61 10.21 20.40 MD<50 NO<50 ND<0.3 ND<0.3 ND<0.3 NO<0.3 NDc2 --- SAL { M AW-5 08/21/91 :50.61 10.07 20.54 ND<50 ND<30 ND<0.30 ND<0.30 ND<0.30 ND<0.30 --- ... SEQ AW-5 11/26/91 30.61 10.69 19.92 370 ND<30 ND<0.30 ND<0.30 ND<0.30 ND<0.30 --- --- SEQ AW-5 02/21/92 30.61 10.43 20.18 ND<50 ND<30 90<0.30 ND<0.30 ND<0.30 ND<0.30 --- --- SEQ I i I I 19-Mar-92 Page 1 I, i