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T <br /> Groundwater Analytical Res..Oxygenate Compounds <br /> Chevron Service Station#9-9840 <br /> 4344 Waterloo Road T <br /> Stockton,California <br /> WELL ID1 METHANOL ETHANOL TBA MTBE RIPE ETRE TANTE <br /> DAT9 { N b) (Pb) ( d) (Ppb) WN (Ppb) <br /> MW-3 <br /> 12/23/98 <1,000 <500 <100 <2 0 <2 0 <2 0 <2 0 <br /> 03/19/99 <1,000 <3,000 <200 <2 0 <2 0 <2 0 <2 0 <br /> 06/11/99 <1,000 <500 <100 <2 0 <2 0 <20 <2 0 <br /> 09/20/99 <1,000 <1,000 <200 <2 0 <2 0 <20 <2 0 <br /> 12/03/99 <1,000 <1,000 <200 <2 0 <2 0 <2 0 <2 0 <br /> 03/09/00 <1,000 <1,000 <100 331 <2 0 <2 0 <2 0 <br /> 06/22/00 <1,000 <500 <100 <2 0 <2 0 <2 0 <2 0 <br /> 12/14/00 <1,0002 <500 <50 <2 0 <2 0 <2 0 <2 0 <br /> 02/23/01 <1,000 <500 <50 <2 0 <20 <2 0 <2 0 <br /> 05/17/01 <1,000 <500 <20 <2 0 <2 0 <2 0 <2 0 <br /> 07/23/01 <1,000 <500 <20 <2 0 <20 <2 0 <2 0 <br /> 10/05/01 <1,000 <500 <100 <2 <2 <2 <2 <br /> EXPLANATIONS <br /> Groundwater laboratory analytical results prior to June 22,2000,were compiled from reports prepared by Blaine Tech Services,Inc <br /> T13A=Tertiary butyl alcohol <br /> MTBE=Methyl ternary butyl ether <br /> DIPE=Di-isopropyl ether <br /> ETBE=Ethyl tertiary butyl ether <br /> TAME=Tertiary amyl methyl ether <br /> (ppb)=Parts per billion <br /> Laboratory report indicates this sample was originally analyzed within holding time Re-analysis for confirmation or dilution was performed past the <br /> recommended holding time <br /> z Laboratory report indicates this sample was analyzed outside of EPA recommended hold time <br /> ANALYTICAL METHODS <br /> EPA Method 8015(Modified)for Methanol <br /> EPA Method 8260 for Oxygenate Compounds <br /> 9-9840 xls/#386846 5 As of 10/05/01 <br />