Laserfiche WebLink
TABLE 2-Continued <br /> GROUND WATER SAMPLE ANALYTICAL RESULTS <br /> Concentrations in micrograms per liter(µg/L) <br /> Former Exxon Service Station No.7-3708 <br /> 2705 Country Club Boulevard <br /> Stockton,California <br /> Monitoring Ethyl- Total TPPH as <br /> Well Rats Benzene Toluene benzene Xylenes oasoline MTBE <br /> MW-7 05/31/94 <0.5 <0.5 <0.5 <0.5 <50 NA <br /> 08/30/94' <0.5 <0.5 <0.5 <0.5 <50 NA <br /> 11/22/94' <0.5 <0.5 <0.5 <0.5 <50 NA <br /> 01/12/95' <0.5 <0.5 <0.5 <0.5 <50 NA <br /> 03/31/95 NS NS NS NS NS NS <br /> 04/05/95 <0.5 <0.5 <0.5 <0.5 <50 NA <br /> 07/14/95 <0.5 <0.5 <0.5 <0.5 <50 NA <br /> 10/05/95 <0.5 <0.5 <0.5 <0.5 <50 NA <br /> 04/02/96 NS NS NS NS NS NS <br /> 07/31/96 <0.5 <0.5 <0.5 <0.5 <50 NA <br /> 10/23/96 <0.5 <0.5 <0.5 <0.5 <50 <5.0 <br /> 02/07/97 <0.5 <0.5 <0.5 <0.5 <50 NA <br /> MW-8 05/31/94 <0.5 <0.5 <0.5 <0.5 <50 NA <br /> 08/30/94' <0.5 <0.5 <0.5 <0.5 <50 NA <br /> 11/22/94' <0.5 <0.5 <0.5 <0.5 <50 NA <br /> 01/12/95' <0.5 <0.5 <0.5 <05 <50 NA <br /> 03/31/95 NS NS NS NS NS NS <br /> 04/05/95 <0.5 <0.5 <0.5 <0.5 <50 NA <br /> 07/14/95 <0.5 <0.5 <0.5 <0.5 <50 NA <br /> 10/05/95 <0.5 <0.5 <0.5 <0.5 <50 NA <br /> 04/02/96 <0.5 <0.5 <0.5 <0.5 <50 NA <br /> 07/31/96 <0.5 <0.5 <0.5 <0.5 <50 NA <br /> 10/23/96 <0.5 <0.5 <0.5 <0.5 <50 <5.0 <br /> 02/07/97 <0.5 <0.5 <0.5 <0.5 <50 NA <br /> ` Total volatile hydrocarbons <br /> s Result is an estimated value because it exceeds the linear range. <br /> ` Atypical chromatogram with unidentified peak(s)within the range of gasoline hydrocarbons. Chlorinated hydrocarbons <br /> are suspected. A ground water sample collected from monitoring well MW-6 on April 17,1992,contained chlorobenzene <br /> and 1,2-dichlorobenzene. <br /> Atypical chromatogram. An�Analysis of this sample EPA Method 624 on April 17, 1992(Past EPA recommended holding <br /> time),was positive for the following chlorinated hydrocarbons: vinylchloride,cis-1,2dichloroethene,trichloroethane and <br /> tettachlorethane. These peaks resulted in a positive fuel hydrocarbon result <br /> ` Atypical chromatogram. Four unknown peaks were observed causing a positive fuel hydrocarbon result Chlorinated <br /> hydrocarbons are suspected. <br /> r Atypical chromatogram. An unknown peak was observed between MTBE and benzene. Chlorinated hydrocarbons are <br /> suspected <br /> 8 Atypical chromatogram. Analysis of this sample by EPA Method 624 on April 17, 1992(past EPA recommended holding <br /> time)was positive for the following chlorinated hydrocarbons: chlorobenzene and 1.2-dichlorobenzene. <br /> TPPH = Total purgeable petroleum hydrocarbons by DHS LUFI' Method or total petroleum hydrocarbons <br /> (TPH)by EPA Method 8015 Modified <br /> MTBE = Methyl tertiary butyl ether. <br /> NA = Not analyzed <br /> NS = Not sampled <br /> LRP005.809 <br />