Document 3QRV1ML07J9GZwBk5mJYekqv3

TO from date REFERENCE SUBJECT MR R A PARK POTTSTOWN P J ELDRETH PERRYVILLE FEBRUARY 27, 1980 INTEROFFICE AMBIENT VINYL CHLORIDE CONCENTRATION - PERRYVILLE PLANT V Per our phone conversation of February 25, 1980 regarding the ambient vinyl chloride concentrations in air throughout the regu lated areas of the plant, the following is offered As I mentioned we do not maintain any records which would make this information readily available Our fixed monitoring system is not programmed to provide average exposures for each area or point monitored and our personnel monitoring program is set up to determine personnel (TWA) exposures only Therefore, without going into a great deal of detail or sum marizing several thousand print-out charts from the fixed monitoring system, I will try to address your question m rather general terms Although the V/C levels are approximations, I do believe they are realistic and fairly accurate as far as the normal and routine V/C concentrations are in Polymerization I and II In Polymerization I a normal vinyl chloride level or background level will range from l-5ppm in approximately 80% of the work areas This does not include the reactor, inside exposure, during the cleaning operation During a routine shift X would estimate that at least one monitoring point would be alarming at the 5~25ppm level, almost continuously The 25ppm and above alarm is seldom activated, but two or three alarms during an eight-hour shift w~ouI~d"nofTbe unusual As for the Polymerization II operation, the normal vinyl chloride background level is much lower I would suspect that l-2ppm would be normal with an occasional excursion above 5ppm when the operator opens a filter pot for cleaning or while he is obtaining a resin sample from the reactor On very rare occasions or during a system malfunction you may see the 25ppm and above alarm activated, but again, this would be rare and certainly not routine for the E-Resin operation I know this is rather vague and somewhat evasive, but as I men tioned earlier, it would require several days to summarize and analyze the numerous monitoring charts to gather the exact informa tion you are seeking I hope this will at least give you a pretty good idea as to what the area V/C levels are throughout the Perryville Plant You should keep in mind that these ambient V/C levels are for areas only and do not reflect what the employee (TWA) exposure would be for that particular work area PJE/sad cc Mr P J Foley 1 Mr L G Clouthier <f P J ELDRETH OCC 014664 TO FROM date REFERENCE SUBJECT MR R A PARK POTTSTOWN P J ELDRETH PERRYVILLE FEBRUARY 27, 1980 IFoiPcgetJoa (f) INTEROFFICE AMBIENT VINYL CHLORIDE CONCENTRATION - PERRYVILLE PLANT Per our phone conversation of February 25, 1980 regarding the ambient vinyl chloride concentrations in air throughout the regu lated areas of the plant, the following is offered As I mentioned we do not maintain any records which would make this information readily available Our fixed monitoring system is not programmed to provide average exposures for each area or point monitored and our personnel monitoring program is set up to determine personnel (TWA) exposures only Therefore, without going into a great deal of detail or sum marizing several thousand print-out charts from the fixed monitoring system, I will try to address your question m rather general terms Although the V/C levels are approximations, I do believe they are realistic and fairly accurate as far as the normal and routine V/C concentrations are in Polymerization I and II In Polymerization I a normal vinyl chloride level or background level will range from l-5ppm in approximately 80% of the work areas This does not include the reactor, inside exposure, during the cleaning operation During a routine shift I would estimate that - at ^Least one monltorJLnq point would be alarming at the 5-25ppm level, almost continuously The 25ppm and above alarm is seldom activated, but two or three alarms during an eight-hour shift would not be unusual As for the Polymerization II operation, the normal vinyl chloride background level is much lower I would suspect that l-2ppm would be normal with an occasional excursion above 5ppm when the operator opens a filter pot for cleaning or while he is obtaining a resin sample from the reactor On very rare occasions or during a system malfunction you may see the 25ppm and above alarm activated, but again, this would be rare and certainly not routine for the E-Resin operation I know this is rather vague and somewhat evasive, but as I men tioned earlier, it would require several days to summarize and analyze the numerous monitoring charts to gather the exact informa tion you are seeking I hope this will at least give you a pretty good idea as to what the area V/C levels are throughout the Perryville Plant You should keep in mind that these ambient V/C levels are for areas only and do not reflect what the employee (TWA) exposure would be for that particular work area PJE/sad cc Mr P J Foley SMT1A Mr L G Clouthier P J ELDRETH OCC 014665