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CAMBRIA <br /> Table 1 Additional Groundwater Analytical Data,Shell-branded Service Station,2575 Country Club Boulevard,Stockton,California <br /> Sample Date RIPE ET13E TAME TBA Methanol Ethanol EDB Volatile Organics by EPA 8260 <br /> (pg/-) (pg/-) (pg/-) (NS/-) (Pg/L) (pgA-) {NPS-) <br /> RW 1A 02-Dec 97 <2 000 <2 000 <2 000 <100 000 82,000 <500 000 NA <br /> RW IA 29-Jan-98 <5 000 <5 000 <5 000 <250 000 100 000 <1,200 000 NA <br /> j RW-lA 23 Apr-98 <20 <20 5,300 00 <1 000 110 000 <5 000 NA <br /> RW-lA 29-Jul-98 <5 000 <5 000 <5 000 <250 000 110 000 <1,250,000 NA <br /> RW-lA 06 Oct-98 <4 000 <4,000 4 300 <200 000 98 000 <I 000 000 NA <br /> RWAA 27-Ian-99 <10,000 <10,000 <10,000 <500 000 180 000 <2 500 000 NA <br /> RW-1A 15-Apr-99 <2 000 <2 000 2200 <200 000 49 000 <3,000,000 NA <br /> RWAA 27-Jul-99 <2,500 <2,500 4,040 <250 000 15 200 <1,250 000 NA <br /> RWAA 28-Oct-99 <2,500 <2 500 2 830 <250 000 <10,000 <1,250,000 NA <br /> RW-lA 28-Jan-00 <1,430 <1,430 2 370 <143 000 <10,000 <714,000 NA <br /> RW-lA 18-Apr-00 <2 000 <2 000 3 110 <100 000 <20,000 <1 000,000 NA <br /> RW-lA 28-Jul-00 <10000 <10000 <10000 NA <20000 NA <10000 <br /> DIPE TAME and EDB wen analyzed outside of EPA <br />� recommended hold time <br /> RW-1A 19-Oct-00 <1,250 <1,250 <l 250 <62 500 <101 000 NA NA WE TAME TBA and ETBE were analyzed outside of EPA <br /> recommended hold time <br /> RW-lA 11-Ian-01 <200 <200 1520 <20000 <500 NA NA <br /> RW-lA 12-Apr-01 <100 <100 1,730 <10000 <20000 NA NA <br /> RW-IA 30 Oct-01 <200 <200 1 300 14 000 <350 000 NA NA <br /> RW-lA 09-Jan-02 <200 <200 1900 11000 <I000000 <2000 NA <br /> RWAA 11 Oct 02 <100 <100 860 5 900 <10000 NA NA <br /> RW-lA 06 Jan-03 <25 <25 380 1700 <2500 NA NA <br /> RW-IA 10-Apr-03 <50 <50 540 3 700 <10000 NA NA <br /> RW-1A 17-Jul-03 <80 <80 I30 4,200 <500 NA NA <br /> RW-IA(DUP) 02 Sep 97 <5 000 <5 000 <5 000 <250 000 240 000 <1 250000 NA Not detected except Benzene 14000 Toluene 18000 and Total <br /> Xylenes 13000 ppb <br /> RW IA(DUP) 02-Dec-97 <2 500 <2 500 <2 500 <120 000 77 000 <620 000 NA <br /> Cal Trans Well Down,Country Club @ Plymouth <br /> Cal Trans 05-Sep-97 <2 0 <2 0 <2 0 <100 <1 000 <500 NA Not detected except for Tolutne 190 ppb <br /> Cal Trans 02 Dec-97 <20 <2 0 <2 0 <100 <1 000 <500 NA <br /> Cal Trans 29 Jan-98 <2 0 <20 <2 0 <100 <1 000 <500 NA <br /> Cal Trans 23 Apr 98 <2 0 <20 <2 0 <100 <1 000 <500 NA <br /> Cal Trans 29 Jul 98 <2 0 <2 0 <2 0 <100 <1 000 <500 NA <br /> Cal Trans 06 Oct 98 <2 0 <2 0 <2 0 <100 <I 000 <500 NA <br /> Cal Trans 27-Jan 99 <2 0 <2 0 <2 0 <100 <2 000 <500 NA <br /> Cal Trans 15-Apr-99 <2 00 <2 00 <2 00 <200 <1 000 <3 000 NA <br /> 0783 Page 6 of 11 <br />