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• Table 1 - Summary of VEOemlcal Analytical Data <br /> Unocal Service Station No 6981 <br /> 4707 Pacific Avenue <br /> Stockton, California <br /> Wellhead Influent Sample Results Effluent Sample Results <br /> Date TPHg TPHg Benzene Benzene Toluene Ethylbenzene Xylenes TPHg TPHg Benzene Benzene Toluene Ethylbenzene Xylenes <br /> (mglm,) (ppmv) (mg/m') (ppmv) (mg/m3) (mg/ml) (mg/m) (mg/ml) (ppm ) (ME/M) (ppmv) (Mglm') (mem') (mg/in') <br /> 12-05 98` 830 219 <10 <0 3 <10 5 53 <10 <3 <0 10 <0 03 <0 10 <0 10 <0 10 <br /> 1221 97 System restarted <br /> 12-29-97 850 224 <50 <1 4 <5 0 64 88 <10 <3 <0 10 <0 03 <0 i0 <0 10 <0 10 <br /> 01-26-98 1,300 343 <5 0 <1 4 <5 0 77 110 <10 <3 <0 10 <0 03 <0 10 <0 10 <0 10 <br /> 02 27 98 1,900 501 <2 5 <0 7 3 8 18 95 <10 <3 <0 10 <0 03 <0 10 <0 10 <0 10 <br /> 03-25-98 450 119 <1 0 <0 3 <10 37 50 15 4 <0 10 <0 03 <0 10 <0 10 021 <br /> 04-20-98 850 224 <0 5 <0 1 <0 5 3 5 67 44 12 <0 10 <0 03 <0 10 <0 to 067 <br /> 0527-98 480 127 <0 5 <0 1 <0 5 15 25 64 17 <0 to <0 03 <0 10 <0 10 019 <br /> 06-30-98 170 45 <0 1 <0 03 <0 1 19 6 3 45 12 <0 10 <0 03 <0 10 <0 10 <0 10 <br /> Explanation <br /> mg/m3=milligrams per cubic meter <br /> ppmv=parts per million by volume <br /> TPHg=Total Petroleum Hydrocarbons as gasoline <br /> `System shut down on 10/26/97 due to the failure of the flame detector The flame detector was replaced on 1215197,and <br /> the system operated approximatley 3 hours Influent and effluent samples were collected to confirm detector operation <br /> and destruction effeciency,then the system was shut down pending rectept of analytical data Dilution valve control <br /> motor replaced and system restarted on 12!21/97 <br /> I <br /> dJunocal/4855/698IRPT XIS 140124 04 <br />