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Table 3: <br /> /aRCAD 1 S for nat.r.f.- <br /> and <br /> Historical Groundwater Monitoring and Analytical Data tuinatuis <br /> Former ARCO Service Station No.6100 <br /> Notes: <br /> GRO=Gasoline range organics <br /> B=Benzene <br /> T=Toluene <br /> E=Ethylbenzene <br /> X=Total xylenes <br /> MTBE=Methyl tertiary butyl ether <br /> TBA=Tertiary butyl alcohol <br /> DIPE=Di-isopropyl ether <br /> ETBE=Ethyl tertiary butyl ether <br /> TAME=Tert-amyl methyl ether <br /> 1,2-DCA =1,2-Dichloroethane <br /> EDB=1,2-Dibromoethane <br /> D.O.=Dissolved Oxygen;rounded to the nearest tenth prior to first quarter 2008 <br /> SPH=Separate-phase hydrocarbons <br /> TOC=Top of casing(surveyed) <br /> Calc.GW Elev.=Calculated groundwater elevation=TOC-Depth to Water+0.75'(Measured SPH Thickness);assuming a specific gravity of 0.75 for SPH <br /> ft-MSL=feet above mean sea level <br /> mg/L=Milligram per liter <br /> pg/L=Microgram per liter <br /> <=Analyte was not detected above the specified method reporting limit <br /> -=Not measured or analyzed <br /> ABN=Well abandoned;no sampling performed <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 pattem 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 /> NP=Well not purged prior to sampling <br /> NS=Well not sampled <br /> SPH=Well not sampled due to the presence of separate phase hydrocarbons(SPH) <br /> VOL=Well not sampled due to insufficient volume of water in well <br /> HD= The chromatographic pattern was inconsistent with the profile of the reference fuel standard. <br /> NM=Not measured.SPH thicknesses in wells MW-1 and MW-15 were re-gauged with a longer interface probe on December 18,2014. SPH was not detected in well MW-1 and sheen was observed in well MW-15. <br /> Results through the first quarter 2004 include purgeable hydrocarbons in the carbon range of C6-C10 <br /> Refer to the reports in which data was first presented for more information on historical data <br /> BTEX,MTBE,and oxygenates analyzed by EPA Method 8260B since 10 2001 <br /> Beginning in the first quarter 2008,the carbon range for GRO was changed from C4-C12 to C6-C12 <br /> Table 2 and 3-Current and Historical GW Data 10 2017.xlsx 38/38 <br />