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CAMBRIA <br /> Table 1 Additional Groundwater Analytical Data,Shell-branded Service Station,2494 East Fremont Street,Stockton,California <br /> Sample Date <br /> DIPE ETBE TAME TBA 1,2-DCA EDB Ethanol Methanol <br /> (AgIt) (ttg/1) (ugh) ULWO (Ag1l) ('Ug/1) (ugn) (ggll) _ <br /> S-1 22-Nov-99 <200 <200 <200 <20,000 NA NA x00,000 NA <br /> S-1 28-Nov-01 <50 <50 <50 <500 NA NA <500 NA <br /> S-2 11-May-98 <2 0 <2 0 <2 0 <100 NA NA <500 <1000 <br /> S-3 I I-May-98 <2 0 <2 0 <2 0 <100 NA NA <500 <1000 <br /> S-4 18-Feb-00 127 <1 00 <1 00 <20 0 123 <0 500 <100 <1000 <br /> S-4 03-May-00 773 <2 00 <2 00 <100 806 <2 00 <1000 NA <br /> S-4 02-Aug-00 7 16* <1 00* <1 00* <20 0* 7 50* <1 00* NA NA <br /> S-4 20-Nov-00 90 <0 50 <0 50 <5 0 10 <0 50 NA NA <br /> S-4 05-Feb-01 852 <2 00 <2 00 <200 <2 00 <2 00 NA NA <br /> S-4 14-May-Ol 820 <0 50 <0 50 <5 0 90 <0 50 NA NA <br /> i <br /> S-4 30-Aug-01 70 <2 0 <2 0 <50 12 <2 0 NA NA <br /> S-4 28-Nov-01 73 <2 0 <2 0 <50 10 C2 0 <500 NA <br /> S-4 18-Feb-02 53 <2 0 <2 0 <50 83 <2 0 NA NA <br /> S-4 01-May-02 69 a 0 <2 0 <50 140 <2 0 NA NA <br /> S-4 08-Aug-02 63 <2 0 <2 0 <50 13 <2 0 NA NA <br /> Abbreviations and Notes <br /> NA=Not analyzed <br /> <x=Not detected at detection limit of x <br /> Kgll=Micrograms per liter(parts per billion) <br /> I <br /> *=Sample analyzed outside of EPA recommended hold time <br /> I <br /> Ethanol,Tertiary butanol(TBA), di-isopropyl ether(DIPE), 1 2-Dibromoethane(EDB) 12-Dichloroethane(1,2-DCA), <br /> ethyl tertiary butyl ether(ETBE),and tertiary aroyl methyl ether(TAME)by EPA Method 8260B <br /> Methanol by EPA Method 8015(Modified) <br /> I <br /> I <br /> 0797 Page 1 of 1 <br />