Laserfiche WebLink
;�E 1 <br /> GROUND WATER MONITORING DATA <br /> Exxon Service Station 7-3708 <br /> 2705 Country Club Boulevard <br /> Stockton, California <br /> Ground <br /> Reference Depth to Water Ethyl- Total TPPH as Oxygenate <br /> Monitoring Elevation Ground Elevation Benzene Toluene benzene Xylenes gasoline MTBE Compounds <br /> Well Date (11) Water(ft) (ft) (µg/L) (pglL) (µg/L) (n/L) (µgr-) (µgr-) (1,42) Comments <br /> VEW-1 03/05/99 NM 797 NC <0 5 78 <0 5 <0 5 87' <2 5 NA No LPH or sheen <br /> (Screened <br /> 5-13 ft bsg) <br /> VEW-3 03/05/99 NM 703 NC <0 5 <0 5 <0 5 <0 5 <50 <2 5 NA No LPH or sheen <br /> I <br /> (Screened <br /> 3-10 ft bsg) <br /> Total volatile hydrocarbons Relerence elevation =Elevation relative to mean sea level <br /> b Result is an estimated value because it exceeds the linear range Depth to ground water =Measured from notch/mark on north edge ofwell casing <br /> }igrL =Micrograms per]tier <br /> ` Atypical chromatograms with unidentified peak(s)within the range of gasoline hydrocarbons Chlorinated TPPH-Total purageble petroleum hydrocarbons or total petroleum hydrocarbons(TPH)by EPA Method 8015 Modified <br /> hydrocarbons arc suspected. A ground water sample collected from morutoruig well MW-6 on April 17 1992 <br /> MTSB=Methyl tertiary butyl ether by EPA Method 8020,except as noted <br /> contained chlorobenzene and 1,2 dichlorobenzene Oxygenate compounds=sample analyzed for ethanol t butanol,MTBE,di isopropyl ether,ethyl tertiary butyl ether,and t <br /> Atypical chromatogram Analysis ofthts sample by EPA Method 624 on April 17,1992(past EPA aroyl methyl ether by EPA Method 8260 Alt analytes were reported below the laboratory detection limit,except as noted <br /> recommended LPH=Liquid phase petroleum hydrocarhms <br /> holding tune),was positive for the following chlorinated hydrocarbons vrnylchlonde,cis 1 2 dichloroetliene NS=Not sampled <br /> tnctdoroethane and tetrachloroethane These peaks resulted in a postttve fuel hydrocarbon result NA=Not analyzed <br /> Atypical diromatogram Four unknown peaks were observed causing a positive fuel hydrocarbon reqult NM=Not measured <br /> C9dorimated hydrocarbons are suspected NC=Not calculated <br /> f Atypical chromatogram An unknown peak was observed between MTBE and benzene <br /> Chlormeted hydrocarbons are suspected <br /> I Atypical duornatogam, Analysis of this sample by EPA Method 624 on April 17 1992(past <br /> EPA mco meaded holduig time),was positive for the following chlorinated hydrocarbons <br /> W robenzene and 1,2-dichlorobenzene <br /> a MTBE concentratrens by EPA Method 8260 <br /> i Unidentified hydrocarbon in the C6 C12 range <br /> { <br /> I <br /> (Page 9 of 9) 93-809 xis <br />