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Table 1 - Summary of VES Chemical Analytical Data <br /> Unocal Service Station No 6981 <br /> 4707 Pacific Avenue <br /> Stockton, California <br /> i4 <br /> Wellhead Influent Sample Results Effluent Sample Results <br /> Date TPH TPH Benzene Benzene Toluene Ethylbenzene Xylenes MtBE �TPHg TPHg Benzene Benzene Toluene Ethylbenzene Xylenes <br /> {mglm) my (mglm3) {ppmv) {mglm3) {mglm3) (mg1m3) (mglm3) {ppmv) (mglm) (pp <br /> (mg/m3) (mg/m3) (m8/m3) <br /> {pp } <br /> 09-20-00 240 63 <0 50 <0 14 <0 50 0 85 0 75 9 3 <2 0 <0 5 <0 010 <0 003 0 23 0 13 0 79 <br /> a9-28-00 170 45 <0 10 <0 03 <0 10 0 20 0 40 72 <2 0 <0 5 <0 010 <0 003 <0 010 <0 010 <0 010 <br /> <1 00 <0 29 <1 00 <1 00 <1 00 <10 0 <100 <2 6 <0 100 <0 029 <0 100 <0 100 <0 100 <br /> 10-25-00 295 78 <br /> 10-30-00 160 42 <0 50 <0 14 <0 50 <0 50 <0 50 3 7 <10 <26 <0 10 <0 029 <a to <a io 0 23 <br /> 11-28-00 293 77 <0 250 <0 07 0 864 0 823 5 04 <2 50 246 6 5 0 0352 001 0 387 0 705 451 <br /> 12-01-00 170 45 <0 50 <0 14 <0 50 <0 50 <0 50 <2 5 <10 <26 <0 10 <0 029 <0 10 <0 10 0 38 <br /> 12-15-00 180 47 <0 50 <0 14 <0 50 090 <050 3 8 <2 0 <0 5 <0 10 <0 029 <0 100 <0 100 <0 <br /> too1 <br /> 12-21-00 200 53 <0 50 <0 14 0 65 0500 GO 0500 [a 0500 0 500 <0 0 <2 6 0 0500 <00 1 <br /> 1 <0 0500 <0 0500 <0 0500 <br /> 01-23-01 <100 <2 6 <0 0500 <0 01 <0 <br /> 01-31-01 System down due to mechanical failure <br /> 06-21-01 <10 0 <2 6 <0 1000 <0 03 <0 1000 <0 10000 <0 10000 <0 500 <10 0 <2 6 <0 1000 <0 03 <0 1000 <0 1000 <0 1000 <br /> 07-02-01 <10 0 <26 <0 1000 <003 <0 1000 <br /> mg/m3 = milligrams per cubic meter <br /> ppmv = parts per million by volume <br /> TPHg = Total Petroleum Hydrocarbons as gasoline <br /> MtBE = methyl tent-butyl ether <br /> NA = not analyzed for this constituent <br /> 1 System shut down on 10/26/97 due to the failure of the flame detector The flame detector was replaced on 1215197, and the system operated approximatley 3 hours <br /> Influent and effluent samples were collected to confirm detector operation and destruction effeciency,then the system was shut down pending reciept of analytical data <br /> Dilution valve control motor replaced and system restarted on 12/21/97 <br /> 2 Sample of effluent inadvertently not collected on 3122199 <br /> 5 Sample also analyzed for methyl tert-butyl ether(<100 mg/m3) <br /> 6 Sample also analyzed for methyl tert-butyl ether(<0 50 mglm3) <br /> 7 Service station facilities were removed Power to VES originally came off the main breaker panel for the service station Station demolition required a new service <br /> drop from power company, which was not completed until August 2000 <br /> Stockton R981 •124 04 r <br />