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TABLE 2 <br /> Historical Groundwater Monitoring&Analytical Data <br /> ARCO Service Station No.2186 <br /> 3212 N.California Street,Stockton,CA <br /> Notes: <br /> GRO=Gasoline range organics <br /> B=Benzene <br /> T=Toluene <br /> E=Ethylbenzene <br /> X=Total xylenes <br /> MTBE=Methyl tert-butyl ether <br /> TBA=Ter[-butyl alcohol <br /> DIPE=Di-isopropyl ether <br /> ETBE=Ethyl tert-butyl ether <br /> TAME=Tert-amyl methyl ether r <br /> 1,2-DCA =1,2 Dichioroethane <br /> EDS=1,2-Dibromoethane <br /> D.O.=Dissolved Oxygen <br /> DTW=Depth to Water <br /> GWIE=Calculated groundwater elevation=TOC-Depth to Water+0.75*(Measured SPH Thickness);assuming a specific gravity of 0.75 for SPH <br /> SPH=Separate phase hydrocarbons <br /> TOC=Top of casing(surveyed) <br /> ft-MSL=feet above mean sea level <br /> µglL=Micrograms per liter <br /> mglL=Miltograms per liter <br /> <=Analyte was not detected above the specified laboratory reporting limit <br /> -=Not measured or analyzed <br /> J=Estimated value(less than the method reporting limit and greater than or equal to the method detection limit) <br /> N=Identity of contaminant uncertain(hydrocarbon pattern atypical of indicated analyte);see lab report <br /> R=Data rejected(data determined to be unreliable by laboratory) <br /> DRY=Well dry during gauging;not sampled <br /> INA=Well inaccessible;not sampled <br /> NS=Well not sampled <br /> VOL=Well not sampled due to insufficient volume of water in well <br /> May 2004-The site was surveyed by Morrow Surveying. <br /> 02186 2Q07 Tables.As Page 14 of 14 SFCOR <br />