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31-0329 Table 1 Summary of Results of Ground Water Sampling Chevron Service Station No. 9-6465 5608 North Pershing Avenue, Stockton, California Concentrations in parts per billion (ppb) asaswsaaswsssrsarrrppapwwwswsssssrassassrarppapppppspswarswrssa:ppassararraraapaaasrrrrpapaaapssaasasraapwwwpawsraarrrapass WELL DATE OF CASING DEPTH GROUND TPH-G B T E x 1,2-DCA LAB ID SAMPLING/ ELEVATION TO WATER MONITORING WATER ELEVATION a�sasaaaaaaatsaanpaaaaaaasasssassrarapaapsaasawarssaasaaaaaaaaapaaaaaaaaaaaaaassaacscassaassasssraasssssaxssaaassasasassasaa MW-9 03/19/90 8.48 --- --- --- --- --- --- --- --- NA MW-9 04/11/90 8.48 --- --- --- ND<0.3 ND<0.3 ND<0.3 ND<0.6 --- GTEL MW-9 05/09/90 8.48 36.74 .28.26 ND<50 ND-c0 3 ND<0 3 ND<0.3 ND<0.6 --- GTEL MW-9 08/17/90 8.48 38.56 -30.08 ND<50 ND<0.3 ND<0.3 ND<0.3 ND<0.6 --- GTEL MW-9 10/22/90 8.48 38.93 -30.45 ND<50 1 1 ND<0.3 1 --- GTEL NW-9 01/19/91 8 48 39.09 -30 61 120 0.6 2 2 10SAL MW-9 07/21/91 8.48 39.75 -31.27 ND<50 ND<0.5 ND<0.5 ND<O.5 ND<0.5 .-- SAL MW-9 10/17/91 8.48 39.96 -31.48 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 --- SAL NW-90 10/17/91 8.48 39.96 -31.48 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 --- SAL MW-9 01/09/92 8.48 38.89 -30.41 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 --- SAL MW-9 03/19/92 8.48 37.44 -28 96 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ... SAL 14W-9 07/01/92 8.48 39.32 -30.84 ND<50 ND<0.5 ND<O 5 ND<0.5 ND<0.5 --- SAL MW-9 09/16/92 8.48 40.64 -32.16 ND<50 ND<0.5 ND<O 5 ND<0.5 ND<0.5 --- SAL NW-10 03/19/90 7.41 --- --- --- --. ._. --- --- --- NA MW-10 04/11/90 7.41 --- --- --- ND<0.3 ND<0.3 ND<0.3 ND<0.6 --- GTEL MW-10 05/09/90 7.41 35.38 -27.97 ND<50 ND<0.3 ND<0.3 ND<0.3 ND<0.6 --- GTEL NW-10 10/22/90 7.41 37.35 -29.94 ND<50 1 1 ND<O.3 1 ... GTEL NW-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 NDc50 ND0.5 ND<0.5 ND<0.5 ND<0.5 --- SAL NW-10 10/17/91 7.41 38.22 -30.81 ND<50 ND<0.5 ND<0.5 ND<0.5 NDcO.5 --- SAL NW-10 01/09/92 7.41 36.44 -29.03 ND<50 ND<0.5 ND<0 5 ND<0.5 ND<0.5 --- SAL NW-100 01/09/92 7.41 36.44 -29.03 ND<50 ND<0.5 ND4 5 ND<O.5 ND<0.5 --- SAL MW-10 03/19/92 7.41 35.84 -28.43 ND<50 ND<0.5 ND<O 5 ND<0.5 NO<0.5 --- SAL NW-10 07/01/92 7.41 37.58 -30.17 ND<50 N040.5 ND40 5 NDc0.5 NO<0.5 --- SAL MW-10 09/16/92 7.41 38.86 -31.45 ND<50 ND40.5 ND4 5 ND<0.5 ND<0.5 --- SAL 27-Oct-92 Page 8