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s i <br /> 40gi <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station#2093 <br /> 3425 Tracy Blvd Tracy CA <br /> Well Depth Groundwater Groundwater Product Ethyl Xylenes <br /> Weil Date Elevation to Water Elevat€on Elevation Thickness TPHg Benzene Toluene benzene (total) MtBE DO <br /> Number Sampled (ft MSL) (fl TOC) (fl MSL) Change(ft) (n) (ppb) (ppb) (ppb) (ppb) {ppb) (ppb) (m IL) <br /> T$1 12/19/2001 <50 <0 50 <0 50 <0 50 <0 50 — <br /> QTCB 3/14/2002 <50 <0 S0 <0 50 <0 50 <0 50 — <br /> Notes <br /> TPHg=Total petroleum hydrocarbons as gasoline <br /> MTBE=Methyl tert butyl ether <br /> DO=Dissolved oxygen <br /> ft=feet <br /> MSL=mean sea level <br /> TOC=top of casing <br /> ppb=parts per billion <br /> mglL=milligrams per lifer <br /> PlNP=purged/not purged <br /> TB 1=Trip Blank <br /> =analyzed using EPA Method 6260 <br /> ^=groundwater elevation corrected by adding 0 77 X product thickness <br /> <=below given laboratory detection limit <br /> =not measured or analyzed(In case of product thickness none found) <br /> (a)=tap of casing altered and casing not resurveyed water level measured from highest point of casing <br /> =Hydrocarbon pattern is present In the requested fuel quantitation range but not resemble the pattern of the requested fuel <br /> Beginnino 2nd quarter 2002 the analytical data validation is summarized in the text <br /> K LZ BP ARC010200140i OTR OMT"t_2,3 7d@ <br />