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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-"_____ -1 ,2-DCA LAB IDSAMPLING/ ELEVATION TO WATER MONITORING WATER ELEVATION MW-7 06/28/88 8 69 28 08 -19 39 ND<1000 ND<O 5 ND<O 5 ND<O 5 ND(O 5 --- 8 & C MW-7 09/14/88 8 69 29 22 -20 53 270 ND(O 1 ND(1 ND(1 ND(1 0 2 CCAS MW-7 12/19/88 8 69 32 24 -23 55 370 1 5 ND<O 1 ND(O 1 0 5 --- CCAS MW-7 03-23-89 8 69 32 24 -23 55 ND(500 3 2 0 5 0 7 3 4 ---- SAL MW--7* 07/19/89 8 69 32 66 -24 17 --- --- --- --- --- --- NA MW-7* 10/05/89 8 69 32 91 -24 22 --- --- --- ---- --- ---- NA MW-7 07/04/90 8 69 32 86 -24 17 --- --- --- --- --- --- NA MW-7* 10/22/90 8 69 --- --- --- ---- _ - --- -__ NA MW-7* 01/19/91 8 69 32 88 -24 19 - --- ---- --- --- --- NA MW-7* 07/21/91 8 69 32 88 -24 19 --- -- --- --- - --- NA MW-8 03/19/90 9 32 36 61 -27 29 --- --- --- --- --- --- NA MW-8 04/01/90 9 32 36 79 -27 47 --- --- --- --- --- --- NA MW-8 04/11/90 9 32 --- --- --- ND<O 3 ND(O 3 ND<O 3 ND<O 6 --- GTEL MW-8 05/09/90 9 32 37 47 -28 15 ND(50 ND<O 3 ND<O 3 ND<O 3 ND<O 6 --- GTEL MW-8 08/17/90 9 32 39 59 -30 27 120 0 3 ND<O 3 ND<O 3 ND<O 6 --- GTEL MW-8 10/22/90 9 32 40 00 -30 68 78 1 0 8 ND<O 3 ND<O 6 --- GTEL MW-8 01/19/91 9 32 40 10 -30 78 250 2 8 5 31 --- SAL MW-8 07/21/91 9 32 40 77 -31 45 140 ND<O 5 ND<O 5 ND<O 5 ND(O 5 --- SAL MW-8D 07/21/91 9 32 40 77 -31 45 ND<50 ND(O 5 ND(0 5 ND(O 5 ND<O 5 --- SAL MW-9 03/19/90 8 48 --- --- --- --- --- -- --- --- NA MW-9 04/11/90 8 48 --- --- --- ND(0 3 ND<O 3 ND(O 3 ND<O 6 --- GTEL MW-9 05/09/90 8 48 36 74 -28 26 ND(50 ND<O 3 ND<O 3 ND<O 3 ND(O 6 --- GTEL MW-9 08/17/90 8 48 38 56 -30 08 ND<50 ND<O 3 ND<O 3 ND<O 3 ND<O 6 --- GTEL MW-9 10/22/90 8 48 38 93 -30 45 ND(50 1 1 ND<O 3 1 --- GTEL MW-9 01/19/91 8 48 39 09 -30 61 120 0 6 2 2 10 --- SAL MW-9 07/21/91 8 48 39 75 -31 27 ND<50 ND<O 5 ND<O 5 ND(O 5 ND<O 5 --- SAL MW-10 03/19/90 7 41 --- --- --- ---- --- --- --- --- NA MW-10 04/11/90 7 41 --- --- --- ND<O 3 ND<O 3 ND<O 3 ND<O 6 --- GTEL MW-10 05/09/90 7 41 35 38 -27 97 ND(50 ND<O 3 ND<0 3 ND(O 3 ND(O 6 --- GTEL MW-10 10/22/90 7 41 37 35 -29 94 ND<50 1 1 ND(O 3 1 --- GTEL MW-10 01/19/91 7 41 37 50 -30 09 110 0 7 3 2 12 --- SAL MW-10 07/21/91 7 41 38 09 -30 68 ND(50 ND(O 5 NO(O 5 ND<O 5 ND<O 5 --- SAL 28-Aug-91