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• i r CAMBRIA Table 1 Additional Groundwater Analytical Data,Shell-branded Service Station,2575 Country Club Boulevard,Stockton,California Sample Date Ethanol TBA DIPE ETRE TAME Methanol EDB Volatile Organics by EPA 8260 (uan-) (Iign-) (Ilan-) (ugti-) (u8R-) WIL) WIL) (ug2) MW-5 27-Jul-99 <1,250000 <250 000 <2,500 <2 500 5 100 <20 000 NA MW-5 28-Oct 99 <1,000,000 <200 000 <2,000 <2 000 3 490 <10000 NA MW-5 28 Jan 00 <625 000 <125,000 <1 250 <1,250 3 020 <10000 NA MW-5 18 Apr-00 <250000 28,200 <500 <500 920 <20000 NA MW 5 28 Jnl-00 NA NA <10 000 <10,000 <10 000 <20 000 <10,000 DIPE TAME and EDB were analyzed outside of EPA recommended hold time MW 5 19-Oct-00 NA <100000 <2,000 <2,000 <2 000 110,000 NA DIPE TAME TBA and ETBE were analyzed outside of EPA recommended hold time MW-5 11 Jan 01 NA <20 000 <200 <200 1 090 <20,000 NA MW 5 12-Apr-01 NA <10,000 <100 <100 457 <20,000 NA MW-5 30-Oct-01 NA 28,000 <200 <200 1,600 <1,000 000 NA MW 5 09-Jan-02 <1,000 30,000 <100 <100 770 <400,000 NA MW-5(DUP) 29-Jan-98 <2 500 000 <500 000 <10 000 <10 000 <10 000 300 000 NA MW-5(DUP) 23-Apr-98 <2 500 <500 <10 <10 2 500 71 000 NA MW-5(DUP) 29 Jul 98 <2 500 000 <500,000 <10 000 <10 000 <10 000 170 000 NA MW-5(DUP) 06-Oct-98 <1 250 000 <250,000 <5 000 <5 000 <5 000 120 000 NA MW-6 02-Sep-97 <500 <100 <2 0 <2 0 <2 0 <1,000 NA Not detected MW 6 02-Dec 97 600 <100 <20 <20 <2 0 <1,000 NA MW-6 29 Jan-98 <500 <100 <20 <20 <2 0 <1 000 NA MW-6 23-Apr-98 600 <100 <2 0 <20 <2 0 <1,000 NA MW-6 29-Jul-98 <1 250 <250 <5 0 <5 0 <5 0 <1 000 NA MW-6 06-Oct 98 <500 <100 <20 <20 110 <1,000 NA MW 6 27-Ian 99 <500 <100 <20 <20 <20 <2,000 NA MW-6 15 Apr 99 <3,000 <200 <2 00 <2 00 <2 00 <1000 NA MW 6 27 Jul-99 <1,000 <200 <2 00 <2 00 <2 00 <1000 NA MW-6 28 Oct-99 <1 000 <200 <2 00 <2 00 <2 00 <1,000 NA MW-7 02-Sep-97 <500 <100 <2 0 <2 0 <20 <1000 NA Not detected MW-7 02-Dec 97 <500 <100 <20 <2 0 <20 <1,000 NA MW-7 29-Jan-98 <500 <100 <20 <2 0 <2 0 <1000 NA MW-7 23-Apr-98 600 <100 <20 <20 <20 <1000 NA MW 7 29-Jul-98 <500 <100 <20 12 0 <2 0 <1 000 NA MW 7 06-Oct 98 600 <100 <20 110 <2 0 <1 000 NA MW 7 27 Jan-99 NA NA NA NA NA <2,000 NA MW-7 15 Apr 99 <3 000 1200 <2 00 <2 00 <2 00 <1 000 NA MW-7 27 Jul-99 NA NA NA NA NA <l 000 NA MW 7 27-Jul-99 NA NA NA NA NA <1000 NA MW 7 28-Oct-99 NA NA NA NA NA <1000 NA 0783 Page 2 of 9