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31-0329 Table 1 Summary of Results of Ground Yater Sampling Chevron Service Station No. 9-6465 5608 North Pershing Avenue, Stockton, California I Concentrations in parts per billion (ppb) aa:aamaasaaasasmaaaasaaamaeaaaam:aaaaasaaaasaasaaaammaaaaaaaazaaaaasasasaazaaxas:ssaxaaavaaaa�tczzaaxaeaaasaRaxazsaaaaxaaaaa HELL DATE OF CASING DEPTH GROUND TPH-G B T E X 1,2-DCII LAB ID SAMPLING/ ELEVATION TO WATER MONITORING WATER ELEVATION aaaaasaaaaasaaasaasasaasaasaaa:asasaaaaa:aaaaaaamasaaaasaaaaaasamsaasaaaaagorasaasasaasasaazsaaaxaaeamaaaaaxa:aaaaaaaaaaasica MW-4 02/04/88 7 75 26 78 -19.03 MD<1000 1 a 0 6 ND<0.5 ND<0.5 --- B & C MW-4 06/14/89 7.75 27 87 -20.12 ND-1000 ND<O 5 ND<O 5 ND<0.5 ND<0.5 --- a & C MW-4 09/14/88 7.75 29.57 -21 82 150 2 8 MD<1 ND<1 ND<1 N04 1 CCAS MW-4 12/16/88 7 75 30.81 -23.06 330 1 MD<1 ND<1 ND<1 MD<0.1 CCAS MY-40 12/16/86 7.75 30.81 -23.06 200 0.9 MD<1 ND<1 MD<1 MD<0.1 CGS MI-4 03/23/89 7 75 30.81 -23 06 ND<500 ND<O 5 ND<O 5 00.5 ND<O 5 --- SAL MW-4 07/19/89 7 75 32.63 -24 88 N0<500 98 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<O 3 ND<0.3 ND<O 3 MD<0.6 GTEL MW-4 05/09/90 7 45 --- --- ND<50 ND<O 3 ND<0.3 ND<O 3 ND<0.6 --- GTEL MY-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-4* 07/21/91 7 45 36.73 -29 28 --- - .__ --- -__ .-_ NA MW-4* 10/17/91 7.45 37.08 -29.63 --- --- --- _-- _-_ --_ NA NW-4* 01/09/92 7.45 37 00 -29.55 --- --- --- NA NW-4 03/19/92 7.45 35 20 -27.75 ND<50 ND-c0.5 0 7 ND<0.5 ND<O 5 --- SAL NW-4A 03/19/90 8 10 34 58 -26 48 --- --- --- --- --- --- MA MY-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 --- MD<O 3 ND<0.3 ND4 3 ND<O 6 --- GTEL MW-4A 08/17/90 8.10 36.67 -28 57 ND<50 ND<0.3 ND<0.3 ND<O 3 ND<0.6 --- GTEL MW-4A 10/22/90 8.10 27.20 -19 10 ND<50 ND<0.3 MD<0.3 ND<0.3 ND<O 6 --- GTEL 14W-4AD 10/22/90 8.10 27 20 -19.10 ND<50 ND<0.3 ND<0 3 ND<O 3 ND<0.6 --- GTEL NW-4A 01/19/91 a 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 14W-4A 07/21/91 8.10 38.11 -30.01 ND<50 ND<0.5 ND<O 5 ND<O 5 ND<O 5 --- SAL Mi-4A 10/17/91 8.10 38.23 -30.13 ND<50 ND<O 5 ND<0.5 ND<O 5 ND<0.5 --- SAL MW-4A 01/09/92 8 10 36 56 -28.46 ND<50 ND-0 5 ND<O 5 ND<0.5 ND<0.5 --- SAL NW-4A 03/19/92 8 10 35 88 -27.78 ND<50 ND<O 5 ND<O 5 ND<0.5 ND<0.5 --- SAL 24-Apr-92 Page 3