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31-0308 Table 1 Summary of Results of Ground hater Sampling Chevron Service Station # 9-4275 2905 hest Benjamin Holt Drive, Stockton, California Concentrations in parts per billion (ppb) -E X 1,2 1,2 1,3 1,4 F113 ICE LAB WELL DATE Of TOP OF DEPTH - GROUND - TPH-G TOG B T DCA DCB DCB DCB ID SAMPLING/ CASING TO WATER MONITORING ELEVATION HATER ELEVATION 2 0 10 ... --- 20 CCAS MW-5 03/22/89 3.79 17 18 -13 39 4000 ND<30D0 35 23^ 110 760 ND< --- _-- "D<1 CCAS MW-5 06/12/89 3.79 17.80 -14.01 900 --- 24 2 2 53 ND<0.2 ND<0.2 --- - - ND<1 --- CCAS MW-5 09/07/89 3 79 19.11 -15.32 410 --- 15 4 12 50 ND<0 2 ND<0 2 --- --- ND<1 •-- CCAS MW-5D 09/07/89 3 79 19.11 -15 32 380 --- 15 4 11 90 ND<0,2 ND<0.2 24 22 100 590 --- --- --- --- --- --- PACE MW-5 12/18/89 3.79 18.63 -14.84 2900 --- _-- -_- --- _-- --- PACE MW-5 03/20/90 3 79 18.19 -14 40 3400 --- 37 29 120 630 65 89 200 1200 --- --- _.. -__ -__ .__ PACE MW-5 07/03/90 3.79 19 43 -15 64 5500 --- 55 82 190 1100 ... --- --- --- --- PACE KW-5 10/19/90 3 79 20 04 -16 25 5900 _._ 26 51 140 830 --- --- _.. --- --- --- SAL MW-5 01/17/91 3.79 19 98 -16.19 4900 6800 18 51 21 790 --- 11 3 1 110 --- --- SAL MW-5 D3/19/91 3.7'9 --- --- 60 65 190 800 --- --- --- --- --' SAL MW-5 07/18/91 3 79 19.72 -15.93 7600 --- _._ MW-5 10/31/91 3 79 20.20 -16.41 2600 --- 44 24 64 310 ND<D.5 ND<0.5 ND<0.5 ND<0.5 --- 1_0 SAL MW-5 01/16/92 3.79 19.60 -15.81 5400 ___ 120 72 250 1000 --- --- --- --- --- --- SAL MW-5D 01/16/92 3.79 19 60 -15 81 4700 110 63 230 960 __. SAL -- --- MW-5 03/17/92 3 79 18.53 -14.74 1100 --- 18 13 52 _�_ __� __- ___ --- SAL MW-5 06/29/92 3.79 20 18 -16 39 850 18 9 0 25 200 --- --- SAL MW-5 12/10/92 3 79 20.78 -16.99 1200 --- 49 16.0 64 200 --- --- --- --- --- 1 Page 5 15-Jan-93