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CAMBRIA <br /> Table 1.Additional Groundwater Analytical Data,Shell-branded Service Station,3725 Tracy Boulevard,Tracy,California ,a <br /> Sample Date Ethanol Tertiary Di-Isopropyl Ethyl Tertiary Butyl Tertiary Amyl Methanol Volatile Organics <br /> Butanol Ether Ether Methyl Ether by EPA 8260 <br /> ID Sampled OWL) (ug(L) (ug/L) (ug/L) (ug/L) OWL) (ug/L) <br /> MW-3A 05-Mar-99 NA NA NA NA NA <1,000 NA <br /> MW-3A 01-Jun-99 NA NA NA NA NA <10,000 NA <br /> MW-3A 30-Aug-99 NA NA NA NA NA <1,000 NA <br /> MW-3A 07-Dec-99 NA NA NA NA NA <1,000 NA <br /> BF-I 24-Oct-01 <500 21,000 <2.0 <2.0 2.4 <2,500 NA <br /> BF-1 28-Oct-02 NA NA NA NA NA <1,000 NA <br /> BF-1 28-Apr-03 <500 NA NA NA NA NA NA <br /> BF-1 30-JuI-03 <50 NA NA NA NA NA NA <br /> RW 30-Jan-03 <500 <50 <2.0 <2.0 <2.0 <1,000 None detected <br /> Abbreviations and Notes: <br /> All analyses performed by EPA Method 8260E <br /> NA=NotAnalyzed <br /> <x=Not detected at reporting limit x <br /> (DUP)=Duplicate sample <br /> *=The original wells,MW-1 through MW-3,were decommissioned in July 1990 during station reconstruction. <br /> They were replaced by MW-1A through MW-3A in August 1990. <br /> 0813 Page 2 of 2 <br />