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0 30-30 Table 1 Summary of Results of Ground Water Sampling Chevron Service Station # 9-6465 5608 North Pershing Drive Stockton California Concentrations in parts per billion (ppb) WELL DATE OF CASING DEPTH GROUND TPH-G B T E X EDC LAB ID SAMPLING/ ELEVATION TO WATER MONITORING WATER ELEVATION MW-1 02-04-68 7 86 26 85 -16 99 ND(1000 21 1 9 ND(O 5 13 --- B & C MW-1 06-28-88 7 86 27 93 -20 07 ND<1000 ND40 5 ND40 5 ND(O 5 ND<O 5 --- B & C MW-1 09-14-88 7 86 29 58 -21 72 530 120 49 15 79 0 4 CCAS MW-1' 12-16-88 7 66 --- --- --- --- --- --- --- --- NA MW-1' 03-23-89 7 86 --- --- --- --- --- --- --- --- NA MW-1` 07-19-89 7 86 30 29 -22 43 --- --- _-- ___ --- --- NA MW-1' 10-05-89 7 86 30 24 -22 38 --- --- --- --- --- --- NA MW-i• 07-04-90 7 86 30 20 -22 34 --- --- --_ --- --- --- NA MW-16 10-22-90 7 86 --- --- --- --- --- --- --- --- NA MW-2 02-03-88 7 99 27 17 -19 18 ND<1000 ND<O 5 ND(O 5 ND(O 5 ND<O 5 --- S & C MW-2 06-28-88 7 99 27 93 -19 94 ND(1000 ND(O 5 ND0 5 ND40 5 ND(O 5 --- 8 & C MW-2 09-14-88 7 99 30 03 -22 04 350 99 29 11 44 0 3 CCAS MW-2 12-19-88 7 99 31 44 -23 45 1000 340 30 ND<10 50 ND410 CCAS MW-2 03-23-B9 7 99 31 46 -23 47 1360 780 23 5 5 27 --- SAL MW-2 07-19-89 7 99 33 43 -25 44 80000 6500 2800 280 2000 --- SAL MW-229 09-08-89 7 99 --- --- 8000 8100 2300 440 2200 --- SAL MW-2 10-05-89 7 99 33 94 -25 95 58000 13000 6500 1200 6800 --- PACE MW-2 04-11-90 7 99 --- --- --- 2 ND(O 3 ND<O 3 ND(O 6 --- GTEL MW-2 05-09-90 7 99 --- --- 61 ND(O 3 ND(O 3 ND40 3 2 --- GTEL MW-2 07-04-90 7 99 34 08 -26 09 --- --- --- --- --- --- NA MW-29 10/22/90 7 99 --- --- --- --- --- --- --- --- NA MW-2A 03-19-90 7 97 34 84 -26 87 NA NA NA NA NA --- NA MW-2A 04-01-90 7 97 35 04 -27 07 NA NA NA NA NA --- NA MW-2A 04/11/90 7 97 NA NA --- 2 ND(O 3 ND(O 3 ND40 6 --- GTEL MW-2A 05-09-90 7 97 35 58 -27 61 61 ND(O 3 ND(O 3 ND(O 3 2 --- GTEL MW-2A 08-17-90 7 97 37 13 -29 16 160 0 6 ND<O 3 ND(O 3 ND40 6 --- GTEL MW-2A 10-22-90 7 97 37 56 -29 59 ND<50 0 7 0 B ND(O 3 0 6 --- GTEL MW-3 02-04-88 8 49 27 59 -19 10 ND41000 ND(O 5 ND<O 5 ND0 5 ND40 5 --- B & C MW-3 06-28-88 8 49 28 66 -20 17 ND(1000 ND40 5 ND(O 5 ND(O 5 ND(O 5 --- B & C MW-3' 12-16-88 8 49 --- --- --- --- --- --- --- --- NA MW-3' 03-23-89 8 49 --- --- --- --- - --- --- --- NA MW-3' 07-19-89 8 49 29 88 -21 39 --- --- --- --- --- --- NA MW-3' 10-05-89 8 49 29 55 -21 06 --- --- --- --- --- --- NA MW-3' 07-04-90 8 49 --- --- --- --- --- --- --- --- NA MW-3" 10-22-90 8 49 --- --- --- --- --- --- --- NA I 16-Jan-91