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CAMBRIA Table l Additional Groundwater Analytical Data,Shell-branded Service Station 2575 Country Club Boulevard Stockton California Sample Date Ethanol TBA DIPE ETBE TAME Methanol EDB Volatile Organics by EPA 8260 (µe/W (u€/W (uglL) (pg/L) (hg/L) (ug/L) (Pg1L) (µs/L) MW-5 29 Jan 98 <2500000 <500000 <10000 <10000 <10000 470000 NA MW-5 23-Apr 98 <2500 <500 11 <10 2600 76000 NA MW 5 29 Jul-98 <2500000 <500000 <t0000 <10000 <10000 130000 NA MW 5 06-Oct-98 <1250000 <250000 <5000 <5000 <5000 89000 NA MW 5 27 Jan-99 <2500000 <500000 <0000 <10000 <10000 290000 NA MW-5 15 Apr-99 <7500000 <500000 <5000 <5000 5080 200000 NA MW-5 27-Jul 99 <1250000 <250000 <2500 <2500 5100 <20000 NA MW-5 28 Oct-99 <1000000 <200000 <2000 <2000 3490 <10000 NA MW-5 28 Jan 00 <625000 <125000 <1250 <1250 3020 <10000 NA MW 5 18 Apr 00 <250000 28200 <500 <500 920 <20000 NA MW 5 28 Jul 00 NA NA <10000 <10000 <10000 <20000 <10000 DIPE TAME and EDB were analyzed outside of EPA recommended hold time MW 5 19 Oct 00 NA <100000 <2000 <2000 <2000 <20000 NA LUE TAME TBA and ETBE were analyzed outside of EPA recommended hold time MW-5 I.I.-Ian 01 NA <20,000 <200 <200 1090 <20000 NA MW 5(DUP) 29 Jan-98 <2500000 <500000 <10000 <10000 <10000 300000 NA MW-5(DUP) 23-Apr-98 4500 <500 <10 <10 2500 71000 NA MW-5(DUP) 29 Jul 98 <2500000 <500000 <10000 <10000 <10000 170000 NA MW 5(DUP) 06 Oct 98 <1250000 <250000 <5000 <5000 <5000 120000 NA MW-6 02-Sep-97 <500 <100 <20 <2 0 <20 <1000 NA Not detected MW-6 02-Dec-97 <500 <100 <20 4 0 <20 <1000 NA MW-6 29 Jan-98 <500 <100 <20 <2 0 <20 <1000 NA MW-6 23 Apr 98 <500 <100 <20 <20 <20 <1000 NA MW-6 29 Jul-98 <1250 <250 <50 <5 0 <50 <1000 NA MW-6 06-Oct 98 <500 <I00 4 0 <20 <20 <1000 NA MW-6 27 Jan-99 <500 <100 <20 <20 <20 <2000 NA MW-6 15 Apr-99 <3000 400 <2 00 <2 00 <2 00 <1000 NA MW 6 27-Jul 99 <1000 <200 <2 00 <2 00 <2 00 <1000 NA MW 6 28 Oct-99 <1000 <200 <2 00 <2 00 <2 00 <1000 NA 0783 Page 2 of 10