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Tab* • <br /> Groundwater Analytical Results <br /> Chevron Service Station#9-8264 <br /> 3775 Tracy Boulevard <br /> Tracy,California <br /> 2,4- 2- 4- EPA MTBE <br /> DATE Dam MnPht MnPht Nap Phenol Cd Cr Ni Pb Zn 8260 Methanol Ethanol TSA (EPA 8260) DIPE ETBE TAME <br /> (ppb) (ppb) (ppb) b) (ppb) b) (ppb) C b) b) (Pb) (Ppb) (ppb) (ppb) __(ppb) (ppb) (ppb) (ppb) ( b) <br /> MW-3 <br /> 08/27/97 __ _- __ _ _ __ _ <2 0-<5 0 <1000 <500 <100 130 <2 0 <2 0 <2 0 <br /> 11/24/97 - -- - - -- - - -- -- <1200 <250 290 <5 0 <5 0 <5 0 <br /> 06/09/98 - -- - - - - <500 <100 120 <2 0 <2 0 27 <br /> 0811019$ - -- - - <500 <100 100 <2 0 <2 0 <2 0 <br /> 02/02/00 -- - - -- -- -- <100000 <20000 14100 <200 <200 450 <br /> MW-4 <br /> 08/27/97 <2 0-<5 0 <1000 <500 <100 20 <2 0 10 <2 0 <br /> 11/24/97 - - - - -- -- - -- -- <500 <100 24 <2 0 2 8 <2 0 <br /> 06109198 - - -- <2500 <500 590 <10 <10 47 <br /> 08110198 -- -- -- - - <4150 <830 1100 <17 <17 150 <br /> 02/02/00 - -- - - -- - - - - - <100000 <20000 15100 <200 <200 422 <br /> EXPLANATIONS <br /> Groundwater laboratory analytical results prior to May 18,2000,were compiled from reports prepared by Blaine Tech Services,Inc <br /> 2,4-Dim=2,4-Dimethylphenol Cr=Chromium MTBE=Methyl tertiary butyl ether =Not Analyzed <br /> 2-MnPhi=2-Methylphenol Ni=Nickel DIPE=Di-isopropyl ether (ppb)=Parts per billion <br /> 4-MnPht=4-Methylphenol Pb=Lead ETBE=Ethyl tertiary butyl ether <br /> Nap=Naphthalene Zn=Zinc TAME=Tertiary amyl methyl ether <br /> Cd=Cadmium TBA=Tertiary butyl alcohol <br /> I Laboratory report indicates calcium was detected at 130,000 ppb <br /> ANALYTICAL METHODS <br /> Dissolved Metals by EPA 200 Series Methods <br /> Volatile Organic Compounds by EPA Method 801011 <br /> Semivolatile Organic Compound by EPA Method 8270B <br /> 9 8264 xls/#386854 7 As of 02/21/01 <br />