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I 30-0136-01 TABLE 1 Summary of Results of Ground Water Monitoring and Sampling Former Mobil bit Bulk Plant 03-343 500 East Grantllnr Road, Tracy, California Concentrations in parts per billion (ppb) saxxsaaxxxmaaxzxzxasaxsx=x'33xxxxxxxaaxxx�Yx3aaxsxxxasxx�*'1.aaaaxxxxsssa22Sxxsax4:xaxxsa2224x22IDaSxaxS��2222S2C=SSSzsS22si2siiSS2SssS22s2SSzsisszSsss2s2ssizsiZs WELL DATE OF TOP OF DEPTH GROUND TPH-G TPH-D B T E X ORGANIC FECAL LAI to SAMPLING/ CASING TO WATER LEAD COLIFORM MONITORING ELEVATION HATER ELEVATION (MPN/100011) ssxzsszsxxcSrixxzsacsx2xxsasxxxxssascxxzazsass::acczxzzsassszz:as2s2zzasaszzasssasszs:asssssccscsxszaassszssssssssazzsasssszzaacss7psssrnaczaassssssssssxs AW-1 10/02/90 32.97 11.65 21.32 ND<50 ND<50 ND<0.3 ND<0.3 ND<0.3 ND<0.3 ND<10 ND<2.2 AEL AW-1 11/21/90 32.97 --- --- --- --- --- --- --- --- --- 11 PACE ND AW-1 02/06/91 32.97 11.48 21.49 ND<50 ND<200 ND<0.5 ND<0.5 <0.5 %D-(O.5 <5 0.5 ND00 ND<2 AEL AW-1 05/07/91 31.54 11.37 20.17 w<50 ND-c50 ND<0.3 ND<0.3 ND<0.3 ND<0.3 --- ND<2 SAL AW-1 08/21/91 31.54 11.28 20.26 ND<30 ND<50 ND<0.30 ND<0.30 ND<0.30 ND<0.30 --- --- SEC AW-1 11126/91 31.54 11.90 19.64 ND<30 480 tt* ND<0.30 ND<0.30 ND<0.30 N04.30 "' SEQ AW-1 O2/21/92 31-54 11_64 19.90 MD<30 ND<50 N0<0.30 ND<0.30 ND<0.30 N0<0.30 --- --- SEG AW-1 04/07/92 32.96 11.55 21.11 ND<30 ND<50 ND<0.30 ND<0.30 ND<0.30 ND<0.30 --- --- SEG Ail-1 06124192 32.96 17.84 21.12 ND<30 ND<50 ND<0.30 ND<0.30 ND<0.30 ND<0.30 --- --- SEC AU-2 10/02/90 33.16 11.37 21.79 NO<50 ND<50 ND<0.3 ND<0.3 ND<0.3 ND<0.3 ND<10 ___ AEL AW-2 02/06/91 33.16 11.30 21.86 ND<50 ND<200 ND<O.5 ND<0.5 ND<0.5 ND<0.5 ND<500 AEL Aw-2 05/07/91 32.68 10.94 21.74 ND<50 ND<50 ND<0.3 ND<0.3 ND<0.3 ND10.3 --- . SAL AW-2 08/21/91 32.68 10.96 21.72 ND<30 ND<50 ND<0.30 ND<0.30 ND<0.30 ND<0.30 --- SEC Aw-2 11/26/91 32.68 11.53 21.15 ND<30 99 ""* ND<0.30 ND<0.30 ND<0.30 ND<0.30 --- --- SEQ AW-2 02/21/92 32.68 11.10 21.58 ND<30 ND<50 ND<0.30 ND<0.30 ND<0.30 ND<0.30 --- ... SEQ AW-2 D4/07/92 33.18 11.41 21.77 ND<30 ND<50 ND<0.30 ND<0.30 ND<0.30 ND<0.30 --- --- SEC AU-2 04/24/92 33.18 11.40 21.78 ND<30 ND<50 ND<0.30 ND<0.30 ND<0.30 ND<0.30 --- ... sea AW-3 10/02/90 32.62 11.42 21.20 4200 10000 0.5 3.5 4.9 21 ND<10 ND<2.2 AEL AW-3 11/21/90 32.62 --- ... --- --- --- --- ... ... ND<2 PACE AW-3 02/06/91 32.62 11.73 20.89 ND<300 9800 ND<2.5 ND<2.5 ND<2.5 ND<5.0 ND<500 ND<2 AEL Aw-3 05/07/91 32.18 11.14 21.04 210 * ND<50 ND<0.3 ND<0.3 0.3 0.8 ND<2 SAL AW-3 08/21/91 32.18 11.05 21.13 620 "* 22000 "* ND<0.60 ND<0.60 ND<0.60 0.70 SEA --- AW-3 11/26/91 32.18 11.67 20.51 610 •* 2600 ND<0.30 ND<0.30 ND<0.30 0.48 SEC AW-3 02/21/92 32.18 11.37 20.81 ND<30 ND<50 ND<0.30 ND40.30 ND<0.30 ND4.30 ... --- SEC AW-3 04/07/92 32.68 11.63 21.05 ND<30 75 ND<0.30 ND<0.30 ND<0.30 ND<0.30 --- --- SEC AW-3 04/24/92 32.68 11.62 21.06 120 ** 1400 ND<0.30 ND<0.30 ND<0.30 ND<0.30 --- --- SEC 15-May-92 Page 1 of 3