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CAMBRIA <br /> Table 1 Additional Groundwater Analytical Data,Shell-branded(Independent)Service Station,1071 North Main Street,Manteca,California , <br /> Sample Date Ethanol TBA DIPE EDB 1,2-DCA ETBE TAME Methanol MTBE 8020 MTBE 8260 <br /> ID Sampled (ug/1) (Ag11) (ug11) (Rgn) (ugfl) (ugfl) (Ag1l) (11911) (ugll) (Itgll) <br /> MW-3 28 Apr 98 <500 <100 <20 NA NA <20 <20 <1000 63 69 <br /> MW-3 28-Jul-98 <500 <100 <20 <0 50 <0 50 <2 0 <20 <1,000 44 45 <br /> MW-3 07-Oct-98 <500 <100 <2 0 <0 50 <0 50 <2 0 <20 <1 000 11 97 <br /> MW-3 28-Jan 99 <500 <100 <2 0 <0 50 <0 50 <2 0 <2 0 <2 000 <2 5 <20 <br /> MW-3 08 Apr 99 <100 <20 0 <1 00 <0 500 <0 500 <1 00 <1 00 <1 000 <5 00 230 <br /> MW-3 22^Jul-99 <500 <100 <2 00 <0 500 4)500 <2 00 <2 00 <1000 449 343 <br /> MW-3 13 Oct-99 <500 <100 <2 00 <0 500 <0 500 <2 00 <2 00 <1000 <2 50 <2 00 <br /> MW-3 06-Jan-00 <1 000 <200 <2 00 <0 500 <0 500 <2 00 <2 00 <1 000 <2 50 <2 00 <br /> MW-3 11-Apr 00 <200 <20 0 <1 00 <100 <100 <100 <100 <1000 468 176 <br /> MW 3 27 Jul-00 <400 <200 <100 <100 <0500 <100 <100 <1,000 <250 <100 <br /> MW 3 10-Oct-00 <2,000 <400 <20 0 <10 0 <100 <20 0 <20 0 <1 000 472 350 <br /> MW 3 23 Jan-01 <0 60 230 <0 60 NA <0 60 <0 60 068 <60 NA 340 <br /> MW 3 26-Apr 01 <500 <200 <5 00 <5 00 <5 00 <5 00 <5 00 NA NA <5 00 <br /> MW-3 Ii Jul-01 <500 110 <20 <20 <20 <20 <20 <1,000 NA 150 <br /> MW 3 25-Oct-01 <500 <50 <20 <20 <20 <2 0 <2 0 NA NA <0 50 <br /> MW 3 15 Jan-02 <500 <50 <50 <2 0 <2 0 <5 0 <5 0 NA NA <5 0 <br /> Abbreviations and Nates <br /> NA=Not analyzed or not available <br /> <x=Not detected at method detection limit of x <br /> Ag11=Micrograms per liter(parts per billion) <br /> 1 2 DCA=i 2-drehloroethane by EPA Method 8010 or equivalent <br /> EDS=Ethylene dtbromtde(1 2-dtbromcethane)by EPA Method 8010 or egtuvalent <br /> MTBE=Methyl tent butyl ether by EPA Methods 8020 and 8260 as indicated <br /> TBA=Ten butyl alcohol(t-butnaol)by EPA Method 8260 <br /> DIPS=DL isopropyl ether by EPA Method 8260 <br /> ETBE= Ethyl tert-butyl ether by EPA Method 8260 <br /> TAME=Tert amyl methyl ether by EPA Method 8260 <br /> dup=Duplicate sample <br /> a=Sample re-analyzed past hold time results should be considered estimates <br /> Methanol by modified EPA Method 8015 or equivalent <br /> Ethanol and t Butanol by EPA Method 82W <br /> 0323 Page 2 of 2 <br />