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31-0329 Table 1 Summary of Resuits of Ground Water Sampling Chevron Service Station No 9-6465 5608 North Pershing Avenue, Stockton, California Concentrations in parte per billion (ppb) aaaaaazaazaaazazaaaa:aaaaaazaasazzzazasazzazzaszaaaaaaaaasaaaaazaaaaazzaazz:ezzasaaaaetaas3a:asazaaaaazazszsaazzaazzzzzzaaa■ WELL DATE Of CASING DEPTH GROUND TPH-G B T E X 1,2-DCA LAB ID SAMPLING/ ELEVATION TO WATER MONITORING WATER ELEVATION zazxzasassasaazaazaaa:aaaazaa=czzzzusaasaszzzasazaaasaaaaeaaaraaaaazaxzazzazaazs-,=:=s.zzaaaaaaaaazaaaasaasasaaszzzsaaaaa MW-1 02/04/88 7.86 26.85 -18.99 NO-0000 21 1.9 ND<0.5 13 --- B & C MW-1 06/28/88 7.86 27.93 -20.07 ND<1000 ND<0.5 ND<0.5 ND<0.5 ND<0.5 --- B & C MW-1 09/14/88 7.86 29.58 -21.72 530 120 49 15 79 0.4 CCAS MW-1* 12/16/88 7.86 --- --- --- --- _-- --- --- --- NA MW-1* 03/23/90 7.86 --- --- ... --- --- --- --- ... NA MW-1* 07/19/89 7.86 30 29 -22 43 _-- --_ --- --- --- ... NA NW-1* 10/05/89 7.86 30.24 -22 38 ... ... ... --- --- ... NA MW-1* 07/04/90 7 86 30.20 -22 34 --- --- --- --- --- --- NA MW-1* 10/22/90 7.86 .-- --- --- --_ --- --- --- --- NA MW-1* 01/19/91 7.86 30 15 -22.29 --- --- --- --- --- --- NA MW-1* 07/21/91 7.86 30.14 -22.28 --- --- --- -_- --- --- NA MW-1* 10/17/91 7.86 30.10 -22 24 --- --- --- .-_ .-- __- NA MW-1* 01/09/92 7.86 30.06 -22.20 ... -_- --- --- --- NA MW-1* 03/19/92 7.86 30.07 -22 21 --- --- --- --- --- --- NA MW-1# 07/01/92 7.86 --- --- --- --- --- --- - --- NA MW-2 02/03/88 7.99 27.17 -19.18 ND<1000 ND<O 5 ND<0.5 ND<0.5 ND<0.5 --- B & C MW-2 06/28/88 7.99 27.93 •19.94 ND<1000 ND<O 5 MD<O 5 ND<0.5 ND<0.5 --- B & C MW-2 09/14/88 7.99 30.03 -22.04 350 99 29 11 44 0 3 CCAS MW-2 12/19/88 7.99 31.44 -23.45 1000 340 30 N0<10 50 ND<10 CCAS MW-2 03/23/90 7.99 31.46 -23 47 1360 780 23 5.5 27 --- SAL MW-2 07/19/89 7.99 33.43 •25.44 80000 6500 2800 280 2000 _-- SAL MW-2** 09/08/89 7.99 --- --- 8000 8100 2300 440 2200 --- SAL MW-2 10/05/89 7.99 33.94 -25.95 58000 13000 6500 1200 6800 --- PACE MW-2 04/11/90 7.99 --- --- --- 2 ND<0.3 ND<0.3 ND<0.6 --- GTEL MW-2 05/09/90 7.99 --- --- 61 ND<O 3 ND<0.3 ND<0.3 2 --- GTEL MW-2 07/04/90 7.99 34.08 -26 09 --- --- --- ___ --- --- NA MW-2* 10/22/90 7.99 --- --- --- --- --- --- NA MW-2* 01/19/91 7.99 34.11 -26.12 --- --- --- ... --- --- NA MW-2* 07/21/91 7.99 34.14 -26.15 --- --- --- --- --- --- NA MW-2* 10/17/91 7.99 34 22 -26.23 --- --- --- --- --- --- NA MW-2* 01/09/92 7.99 34 14 -26.15 --- --- - --- --- --- NA MW-2* 03/19/92 7.99 34.16 -26.17 --- --- --- - --- --- NA MW-20 07/01/92 7.99 --- ... --- --- --- --- --- --- NA 06-Aug-92 Page 1