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30-329 Table 1 Summary of Results of Ground Water Sampling Chevron Service Station 0 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-3 02/04/88 8 49 27.59 -19 10 ND(1000 ND<O 5 NOW 5 ND(O 5 ND<O 5 --- 8 & C MW-3 06/28/88 6 49 28 66 -20 17 ND(1000 ND(0 5 ND(O 5 ND(0 5 ND(0 5 --- 8 a 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 MW-3* 01/19/91 8 49 29 79 -21 30 --- --- --- --- --- --- NA MW-4 02/04/88 7 75 26 78 -19 03 ND(1000 1 8 0 6 ND(O 5 ND(0 5 --- 8 a C MW-4 06/14/89 7 75 27 87 -20 12 ND(1000 ND(O 5 ND<O 5 ND(0 5 ND<O 5 --- B E C MW-4 09/14/88 7 75 29 57 -21 82 150 2 8 ND<1 ND(1 ND(1 ND<O 1 CCAS MW-4 12/16/88 7 75 30 81 -23 06 330 1 ND<l ND(1 ND(1 ND<O 1 CCAS MW-4D 12/16/88 7 75 30 61 -23 06 200 0 9 ND<1 ND<1 ND<1 ND<O.1 CCAS MW-4 03/23/89 7 75 30 81 -23 06 ND<500 NOW 5 ND(0 5 ND(0 5 ND(0 5 --- SAL MW-4 07/19/89 7 75 32 63 -24 88 ND(500 96 0 8 ND(0 5 10 --- SAL MW-4* 10/05/89 7 45 34 25 -26 80 --- --- - --- --- --- NA MW-4 04/11/90 7.45 --- --- --- ND(0 3 ND<O 3 ND(O 3 NOW 6 --- GTEL MW-4 05/09/90 7 45 --- --- ND(50 ND(0 3 ND(0 3 ND(0 3 ND(0 6 --- GTEL MW-4 07/04/90 7 45 35 08 -27 63 ND(50 6 ND(0 3 ND(O 3 ND(0 6 --- GTEL MW-4* 10/22/90 7 45 --- --- --- -_- --- --- --- --- NA MW-4* 01/19/91 7 45 36.62 -29 17 --- --- --- --- --- --- NA MW-4A 03/19/90 8 10 34 58 -26 48 --- --- --- --- --- --- NA MW-4A 04/01/90 8 10 34 76 -26 66 --- --- --- --- --- --- NA MW-4A 04/11/90 8.10 --- --- --- --- - --- --- --- NA MW-4A 05/09/90 8.10 35 31 -27 21 --- ND(O 3 ND(0 3 ND(0 3 ND(O 6 --- GTEL MW-4A 08/17/90 8.10 36.67 -28 57 ND(50 ND<O 3 ND<O 3 ND(0 3 ND(0 6 --- GTEL MW-4A 10/22/90 8 10 27 20 -19 10 ND(50 ND<O 3 NOW 3 ND(0 3 ND<O 6 --- GTEL MW-4AD 10/22/90 8 10 27.20 -19 10 ND<50 ND(0 3 ND(0 3 ND(0 3 ND<O 6 --- GTEL MW-4A 01/19/91 8 10 37 52 -29 42 130 1 4 2 15 --- SAL MW-4AD 01/19/91 8 10 37 52 -29 42 140 2 5 2 17 --- SAL 08-Mar-91 Page 2