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Table 1 - Summary of VES Chemical Analytical Data <br /> Unocal Service Station No 6981 <br /> 4707 Pacific Avenue <br /> Stockton, Califomia <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 /> (mg/m) (ppmv) (Mg/m) (ppmv) (mg/M3) (mg/m) (mgtm) (mgtm3) (ppmv) (mg/m) (ppmv) (mg/m) (mgtm) (mglm) <br /> 09-22-94 5,800 1,529 153 44 452 66 227 <11 <3 0 108 <0 03 0152 <0 109 0109 <br /> 10-07-94 4,350 1,147 132 38 493 37 118 <11 <3 0108 <0 03 <0111 <0109 <0109 <br /> 11-08-94 5,220 1,376 164 47 238 26 118 <11 <3 0106 <003 <0111 <0109 <0109 <br /> 12-11-94 4,100 1,081 57 16 320 58 220 74 20 0 060 002 12 1 1 64 <br /> 01-09-95 6,100 1,609 99 28 640 120 560 160 42 083 024 15 57 29 <br /> 01-22-95 System shut dorm for modification from thermal to catalytic mode <br /> 05-16-95 7,600 2,004 130 37 580 96 330 510 134 10 287 30 29 84 <br /> 05-23-95 System shut down due to destruction efficiency less than 95% <br /> 12-19-95 1,000 264 20 6 28 3 11 <10 <3 <0 050 <0 01 011 <0 050 00089 <br /> 01-24-96 5,700 1,503 56 16 540 89 440 15 4 <010 <0 03 <010 <010 010 <br /> 02-26.96 1,500 396 <10 <3 120 20 93 58 15 <010 <0 03 030 <010 31 <br /> 03-26-96 1,800 475 <10 <3 150 30 150 26 7 <010 <0 03 <010 <010 071 <br /> 0423-96 1,600 422 <010 <0 03 160 38 180 <10 <3 <010 <0 03 <0 10 <010 059 <br /> 05-28-96 1,300 343 <2 0 <0 6 96 34 170 33 9 <010 <0 03 <010 <010 019 <br /> 06-25-96 3,200 844 <10 <3 210 89 480 16 4 <010 <0 03 029 010 057 <br /> mglm'=milligrams per cubic meter <br /> ppmv=parts per million by volume <br /> TPHg=Total Petroleum Hydrocarbons as gasoline <br /> 485502-8 <br />