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• Table 2 - Summar VES Operation • <br /> Unocal Service Station No 6981 <br /> 4707 Pacific Avenue <br /> Stockton, California <br /> Destruction <br /> Hour Wellhead Influent Effluent Effic <br /> Date Meter Flow Rate TPHg MTPHg Cumulative Benzene MBenzene Cumulative Flow Rate TPHg MTPHg Benzene MBenzene TPHg <br /> Reading (scfm) (ppmv) (lbs/day) MTPHg (ppmv) (lbs/day) MBenzene (scfm) (ppmv) (lbs/day) (ppmv) (lbs/day) M <br /> 05-24-99 16789 595 448 8 14,429 2615 0 453 176 1646 24 12 <0 17 <0 008 9471 <br /> 05-26-99 16835 72 1 13 0 14,438 002 00003 176 1843 18 1 1 0 016 00009 -4264 <br /> 05-26-99 System shut down due to low influent concentrations <br /> 06-19-99 16835 596 219 4 14,438 920 0 1596 176 1628 17 09 0 086 00041 92 17 <br /> 06-21-99 16883 901 23 1 14,442 066 00173 177 185 7 26 1 6 0 078 00042 -1494 <br /> ElpinnnfilM. <br /> lbs/day = 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 /> i System shut down on 10/26/97 due to the failure of the flame detector The flame detector was replaced on 1215/97, 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 reciept of analytical data Dilution valve control <br /> motor replaced and system restarted on 12/21/97 <br /> Sample of effluent inadvertently not collected on 3122199 <br /> 3 Sample bag for effluent sample deflated during transport to laboratory <br /> Stockton to 6981 ids 140124 04 <br />