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• • CAMBRIA <br /> Table 1 AdtLtional Groundwater Analytical Data,Shell-branded Service Station 1071 North Main Street,Manteca Caltforrua <br /> Sample Date Ethanol TBA D1PE EDB 12 DCA ETBE TAME Methanol MTBE 8020 MTBE 8260 <br /> 1D Sampled (Ag l) (A911) (LSA) (µg11) (AO) ,.,.._ (ttg/1) (PgA) (PgA) (Itg1l) (Jtg1l) <br /> MW 3 28 Apr 98 <500 <100 <20 NA NA <20 <20 <1000 63 69 <br /> M W 3 28 Jul 98 <500 <100 <20 <0 50 <0 50 <20 <20 <1000 44 45 <br /> M W 3 07 Oct 98 <500 <100 <20 <0 50 <0 50 <20 <20 <1000 11 97 <br /> M W 3 28 Jan 99 <500 <100 <20 <0 50 <0 50 <20 <20 <2 000 <25 <20 <br /> M W 3 08 Apr 99 <100 <20 0 <1 00 <0 500 <0 500 <1 00 <1 00 <1000 <5 00 230 <br /> MW 3 22 Jul 99 <500 <10D <2 00 <0 500 <0 500 <2 00 <2 00 <1000 449 343 <br /> M W 3 13 Oct 99 <500 <100 <2 00 <0 500 <0 500 <2 00 <2 00 <1 000 <2 50 <2 00 <br /> M W 3 06 Jan-00 <1000 <200 <2 00 <0 500 <0 500 <2 00 <2 00 <1 000 <2 50 <2 00 <br /> MW 3 I1 Apr-00 <200 <200 <100 <100 <1 00 <1 00 <1 00 <1 000 468 176 <br /> MW3 27 Jul 00 <400 <200 <100 <100 <0500 <100 <100 <1000 <250 <100 <br /> M W 3 10-Oct-00 <2 000 <400 <20 0 <100 <100 <20 0 <20 0 <1000 472 350 <br /> M W 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 <20D <5 00 <5 00 <5 00 <5 00 <5 00 NA NA <5 00 <br /> MW 3 11 Jul 01 <500 110 <20 <20 <20 <2 0 <2 0 <1000 NA 150 <br /> M W 3 25 Oct 01 <500 <50 <20 <20 <20 <2 0 <2 0 NA NA <0 50 <br /> M W 3 15 Jan 02 <500 <50 <5 0 <20 <20 <5 0 <5 0 NA NA <5 0 <br /> M W 3 l 1 Apr-02 <500 <50 <2 0 <20 <20 <2 0 <2 0 NA NA 13 <br /> MW 29 Jul 02 <500 <50 <2,0 <20 <20 <20 <2.0 NA NA <050 <br /> Abbreviations and Nates <br /> NA=Not analyzed or not available <br /> <x=Not detected at method detection lint of x <br /> µgA=Micrograms per Inter(parts per billrnn) <br /> 12 DCA=12 dtchlotnethane by EPA Method 8010 or equivalent <br /> EDB=Ethylene dtbromrde(1 2 dibromoethaae)by EPA Method 8010 or equivalent <br /> MTBE=Methyl ten butyl ether by EPA Methods 8020 and 8260 as indicated <br /> TBA=Ten butyl alcohol(I butawt)by EPA Method 8260 <br /> DIPE=D==Sopropyl ether by EPA Method 82W <br /> ETRE=Ethyl ten butyl ether by EPA Method 8260 <br /> TAME=Ten amyl methyl etherby EPA Method 8260 <br /> dup=Duplicate sample <br /> a a Sample re analyzed pas=hold acne results should be coostdeted estimates <br /> Methanol by modified EPA Method 8015 or equtvalent <br /> Ethanal and t Butanol by EPA Method 8260 <br /> 0323 Page 2 of 2 <br />