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Table 5 Historical Groundwater Analytical Results-Fu el Oxygenates Results In Micrograms per Liter(ug1L or ppb) . Time Oil Company-Property 04-049 14000 East Highway 88 Lockeford,California WELL DATE ID SAMPLED MtSE TBA DIPE EtBE TAME 1,2-DCA EDB (ug1L) (uglL) ug/L) (ug1L) (ug/L) uglL ug/L MW-1 07/14/99 ND(5 0) ND(250) ND(5 0) ND(5 0) ND(5 0) 11/24/99 ND(50) ND(2500) ND(50) ND(50) ND(50) - - 02l17/00 NS NS NS NS NS NS NS 06/01/00 NS NS NS NS NS NS NS 08/18/00 NS NS NS NS NS NS NS 11/04/00 NS NS NS NS NS NS NS 01/11/01 ND(250) ND(12500) ND(250) ND(250) ND(250) NA NA 04/27/01 NS NS NS NS NS NS NS 08/20/01 NS NS NS NS NS NS NS 11/28/01 NS NS NS NS NS NS NS 03/04/02 ND(50) ND(500) ND(50) ND(50) ND(50) NA NA 05/16/02 ND(5 0)' ND(50)' ND(5 0)' ND(5 0)' ND(5 0)' NA NA 07/25/02 NS NS NS NS NS NS NS 11/12/02 ND(5 0) ND(50) ND(5 0) ND(5 0) ND(5 0) NA NA 01/16/03 15 ND(5 0) ND(0 5) ND(0 5) ND(0 5) NA NA 05/15/03 ND(0 5) ND(5 0) ND(0 5) ND(0 5) ND(0 5) NA NA 07/24/03 05 ND(5 0) ND(0 5) ND(0 5) ND(0 5) NA NA 10/20/03 NS NS NS NS NS NS NS 01/05/04 NS NS NS NS NS NS NS 04/01/04 NS NS NS NS NS NS NS 07/23/04 06 ND(5 0) ND(0 5) ND(0 5) ND(0 5) NA NA 10/04/04 08 ND(5 0) ND(0 5) ND(O 5) ND(0 5) NA NA MW-2 07/14/99 07 ND(25) ND(0 5) ND(0 5) ND(0 5) _= 11/24/99 27 ND(25) ND(0 5) ND(0 5) ND(0 5) 02/17/00 ND(0 5) ND(25) ND(0 5) ND(O 5) ND(0 5) 06/01/00 15 ND(25) ND(0 5) ND(0 5) ND(0 5) - - 08/18/00 11 ND(25) ND(0 5) ND(0 5) ND(0 5) -- -- 11/04/00 08 ND(25) ND(0 5) ND(0 5) ND(0 5) 08 ND(0 5) 01/11/01 ND(0 5) ND(25) ND(0 5) ND(0 5) ND(O 5) NA NA 04/27/01 ND(O 5) ND(5 0) ND(0 5) ND(0 5) ND(0 5) NA NA 08/20/01 ND(0 5) ND(5 0) ND(0 5) ND(0 5) ND(0 5) NA NA 11/28/01 ND(0 5) ND(5 0) ND(0 5) ND(0 5) ND(0 5) NA NA 03/04/02 ND(0 5) ND(5 0) ND(O 5) ND(0 5) ND(O 5) NA NA 05/16/02 07 ND(5 0) ND(0 5) ND(0 5) ND(0 5) NA NA 07/25/02 ND(0 5) ND(5 0) ND(0 5) ND(0 5) ND(0 5) NA NA 11/12/02 ND(0 5) ND(5 0) ND(0 5) ND(0 5) ND(0 5) NA NA 01/16/03 ND(0 5) ND(5 0) ND(0 5) ND(0 5) ND(0 5) NA NA 05/15/03 ND(0 5) ND(5 0) ND(0 5) ND(0 5) ND(O 5) NA NA 07/24/03 ND(0 5) ND(5 0) ND(0 5) ND(O 5) ND(0 5) NA NA 10/20/03 ND(O 5) ND(5 0) ND(0 5) ND(0 5) ND(0 5) NA NA 01/05/04 ND(0 5) ND(5 0) ND(0 5) ND(0 5) ND(0 5) NA NA 04/01/04 ND(0 5) ND(5 0) ND(O 5) ND(0 5) ND(0 5) NA NA 07/23/04 ND(0 5) ND(5 0) ND(0 5) ND(0 5) ND(0 5) NA NA 10/04/04 ND(0 5) ND(5 0) ND(0 5) ND(0 5) ND(0 5) NA NA Notes ug/L=micrograms per Liter 1 2 DCA=1,2 dichloroelhane MtBE=Methyl Tert-Butyl Ether EDB=1 2 dibromoethane TBA=Tert-Butanol ND=Not Detected at or above the reported detection limits DIPE=Di-isopropyl Ether NS=Not Sampled EtBE=Ethyl tert-Butyl Ether NA=Not Analyzed ' TAME=Tert-Amyl Methyl Ether Elevated reporting levels are due to high concentration of non-target analytes requiring sample dilution . 1) Well was reportedly dry during gauging on 10/20/03 115/04 and 411104 2) Water levels dropped 0 35'within monitoring well MW-10 following initial gauging of site wells The well was not sampled ' an 10/20/03 due to an insufficient amount of water in the well 3) Grab sample 4) Insufficient amount of water to sample well Listed concentrations were analyzed via EPA Method 8260 11Time 00\Lo0kef0rdlTab1eslSCM&Asmt Tbls xis Page 1 of 5