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r <br /> i <br /> R <br /> Table 2 - Summary of VES Operation <br /> Unocal Service Station No 6981 <br /> 4707 Pacific Avenue <br /> Stockton, California <br /> • <br /> Wellhead Influent Effluent Destruction Effie <br /> Date Flow Rate TPHg MTPHg Cumulative Benzene MBenzene Cumulative Flow Rate TPHg MTPHg Benzene MBenzene TPHg Benzene <br /> (scfm) (ppmv) (lbs/day) MTPHg (ppmv) (lbs/day) MBenzene (scfm) (ppmv) (lbs/day) (ppmv) (lbs/day) (%) (%) <br /> 09-22-94 629 1,529 30 0 44 0 8 0 2924 <3 027 003 0 003 9981 9993 <br /> 10-07-94 1496 1,147 54 681 38 17 20 1621 <3 015 003 0 001 9975 9992 <br /> 11-08-94 1281 1,376 56 2,238 47 18 68 1755 <3 016 003 0 002 9979 99 94 <br /> 12-11-94 111 4 1,081 38 3,612 16 0 5 101 1386 20 086 0 02 0 001 9820 99 89 <br /> 01-09-95 1363 1,609 70 4,413 28 1 1 125 2587 42 346 024 0 018 9738 9916 <br /> 01-22-95 System shut down for modification from thermal to catalytic mode <br /> 05-16-95 1137 2,004 72 5,417 37 1 2 141 1973 134 8 41 287 0165 9329 92 31 <br /> 05-23-95 System shut down due to destruction efficiency less than 95% <br /> Ibslday=pounds per day <br /> MBenzene=mass of benzene <br /> MTPHg=mass of TPHg <br /> ppmv=parts per million by volume <br /> scfm=standard feet per minute <br /> 4855 02-5 <br />