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TABLE 9 0 Groundwater Monitoring and Analytical Data ARCO Service Station No 2130 7906 North EI Dorado Street,Stockton, California Elevation Top of Static Water Groundwater Ethyl- Total Well TOC Screen Level Elevation TPHg Benzene Toluene benzene Xylene MtBE Number Date (feet msl) (ft btc) (ft btc) (feet msl) Pg/L P91L Pg/L Pg/L Pg/L PgIL MW 10 3/13/2002 NM NM NE Well Covered (Cont'd) 6/18/2002 NM NM NE Well Covered 9/11/2002 NM NM NE Well Covered 12118/2002 NM NM NE Well Covered 3/6/2003 NM NM NE Well Covered 6/11/2003 NM NM NE Well Covered 9/25/2003 Well Destroyed VW 1 5/20/1997 NM 4400 4416 NE 340,000 330 540 2 100 13,000 <1,200 9/1/1998 NM 4175 NE NA NA NA NA NA NA 12/2/1998 NM 38 43 NE NA NA NA NA NA NA 3/31/1999 NM 3891 NE NA NA NA NA NA NA 6/4/1999 NM 3578 NE NA NA NA NA NA NA 9/2/1999 NM 4030 NE NA NA NA NA NA NA 11/2911999 NM 3849 NE NA NA NA NA NA NA 3/16/2000 NM 3452 NE NA NA NA NA NA NA 6/26/2000 NM 3708 NE NA NA NA NA NA NA 9/28/2000 NM 4134 NE NA NA NA NA NA NA 12/19/2002 NM 41 59 NE 810 <5 0 <5 0 59 130 6 4[2] 3/6/2003 NM 3869 NE 350 0 92 <0 5 21 6 8 25[2] 6/11/2003 NM 3795 NE <50 <0 5 <0 5 <0 5 <0 5 8 4[21 9/24/2003 NM 4196 NE 51 <0 5 <0 5 <0 5 <0 5 8 7[21 12/10/2003 NM 4097 NE 170 18 <05 6 8 is 13[21 VW 2 12/19/2002 NM 4100 NE 120 12 <0 50 <0 50 <0 50 <0 50[2] 3/6/2003 NM 3875 NE 220 1 3 <0 5 <0 5 <0 5 <0 5[2] 6/11/2003 NM 3808 NE 53 <0 5 <0 5 <0 5 <0 5 <0 5[2] 9/24/2003 NM 4212 NE 110 092 <0 5 <0 5 <0 5 <0 5[2] 12/10/2003 NM 4099 NE 300 13 <0 5 <0 5 <0 5 <0 5[2] VW-3 12/19/2002 NM 4158 NE <50 10 <0 50 38 10 8 9[21 3/6/2003 NM 3923 NE 120 12 <0 5 4 0 31 14[2] 6/11/2003 NM 3876 NE <50 <0 5 <0 5 <0 5 <0 5 2 6[2] 9/24/2003 NM 4274 NE <50 <0 5 <0 5 <0 5 <0 5 5 4[21 12!1012003 NM 4160 NE 78 11 <05 <0 5 <0 5 5 0[2] K 1Wprocess\A SP AAC05021301QuarterfyM QTR 0342130 GWMR 4003 9 of 13