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CAMBRIA Table 1 Additional Groundwater Analytical Data,Shell-branded Service Station,2575 Country Club Boulevard,Stockton,California Sample Date Ethanol TBA D1PE ETBE TAME Methanol EDB Volatile Organics by EPA 8260 (AgIL) (1191-) (AglL) (I+gft-) OWL) (µ8I-) OWL) (AgfL) MW 5 27-Jul 99 <1250,000 <250000 Q1500 <2500 5,100 <20000 NA MW-5 28-Oct-99 <1 000,000 1200 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 <250 000 28,200 <500 <500 920 <20 000 NA DIPS,TAME and EDB were analyzed outside of EPA MW-5 28Jul-00 NA NA <10000 <10,000 <10000 <20000 <10000 recommended hold time MW 5 19-Oct-00 NA <100,000 <2 000 <2,Q00 <2 000 RIPE TAME,TBA and)TBE were analyzed outside of EPA <20 OW NA recommended hold tune MW-5 11 Jan-01 NA 120 000 <200 <200 1090 120 000 NA MW 5 12-Apr-01 NA <10,000 <100 <100 457 <20000 NA MW 5 30.Oct-01 NA 28 000 <200 <200 1,600 <1000,000 NA MW 5 09-Jan-02 <1,000 30 000 <100 <100 770 <400,000 NA MW-5 18-Jul-02 NA 4 900 <100 <100 120 <10 000 NA MW 5 11 Oct 02 NA 20,000 <250 <250 2,200 <50,000 NA I 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 4500 <10 <10 2500 71,000 NA MW-5(DUP) 29-Jul-98 <2,500 000 <500 000 <10 000 <10000 <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 02Sep-97 <500 <100 <2 0 <20 <2 0 <1,000 NA Not detected MW-6 02 Dec-97 <500 <100 <20 <20 <2 0 MW 6 29-San-98 <500 <100 <20 <20 <20 <1000 NA MW 6 23-Apr 98 <500 <100 <2 0 <2 0 <20 <1,000 NA MW-6 29-Jul-98 <1,250 1250 <5 0 <5 0 <5 0 <1 000 NA MW-6 06-Oct 98 <500 <100 <20 <20 <20 <1 000 NA MW-6 27 Jan-99 <500 <100 <20 <20 <20 <2,0W NA MW-6 15 Apr-99 <3 000 <200 <2 00 <2 00 <2 00 <1,000 NA MW 6 27 Jul 99 <1,000 <200 <2 00 <2 00 <2 00 <1,000 NA MW 6 28-Oct 99 4,000 <200 <2 00 <2 00 <2 00 4,000 NA MW-7 02Sep-97 <500 <100 <2 0 <2 0 <20 <1,000 NA Not detected MW 7 02-Dec-97 <500 <100 <2 0 <2 0 <2 0 <1000 NA MW 7 29-Jan-98 <500 <100 <20 <20 <20 <1,000 NA MW-7 23-Apr 98 <500 <100 <20 <20 <20 <1000 NA MW-7 29-Jul-98 <500 <100 <20 <20 <20 <1,000 NA MW-7 06-Oct-98 <500 <100 <2 0 <2 0 <2 0 <1,000 NA MW 7 27-Jan 99 NA NA NA NA NA 12000 NA MW-7 15-Apr-99 <3 000 <200 <2 00 <2 00 <2 00 <1 000 NA MW 7 27-Jul-99 NA NA NA NA NA <1000 NA MW-7 27 Jul 99 NA NA NA NA NA <1000 NA MW-7 28 Oct-99 NA NA NA NA NA <l 000 NA I 0783 Page 2 of 9