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TABLE 4 VAPOR EXTRACTION SYSTEM ANALYTICAL RESULTS, EXXON RS 7-0137, STOCKTON, CALIFORNIA <br /> Sample Concentration (pg/L) <br /> Location Date TPH-g Benzene Toluene Ethyl Benzene Total Xylenes <br /> Influent 02/21/97 380 18 31 3 34 <br /> 02/27/97 52 0 064 043 052 5 6 <br /> 04/04/97 1,200 < 005 11 18 130 <br /> 05/06/97 130 < 025 0 84 094 8 6 <br /> Intermediate 02/21/97 NM NM NM NM NM <br /> 02/27/97 NM NM NM NM NM <br /> 04/04/97 920 1 8 7 < 005 < 0 05 <br /> 05/06/97 < 10 < 0 1 < 0 1 < 0 1 < 0 1 <br /> Effluent 02/21/97 < 5 < 0 05 0 18 < 0 05 029 <br /> 02/27/97 < 5 < 005 031 0 056 038 <br /> 04/04/97 24 0 1 0 054 < 0 05 029 <br /> 05/06/97 < 10 < 0 1 < 01 < 0 1 < ) <br /> pg/L- micrograms per liter <br /> TPH-g- Total Petroleum Hydrocarbons as gasoline <br /> NA -Not Analyized <br /> 1-1projects151501 371publi0o10I37air els Page 1 of Pages) <br />