Document 5R0adgME3vJgNbnQ98YDQMdD

Interoffice Communication From Date Subject A. H. Sather J. V. Uptain"^* September 14, 1978 VCM DOSIMETRY FOR AUGUST, 1978 conoco Below are the VCM dosimetry results for August, 1978. 72 samples were taken, 13 (18%) of which indicated overexposures. Range, PPM 0.0 - 0.5 0.5 - 1.0 1.0 - 5.0 5.0+ No. Samples 44 15 11 2 72 % 61.11 20.83 15.28 2.78 100.00 Detailed results of overexposures are shown on the attached table. As can be seen, two (2) tasks were found that appear to pose exposure hazards; i.e.; changing VCM filters and reactor condensor brushing. The former has been a respirator-required job, although the latter hasn't. The 3M disposable respir ator is being considered for condensor brushing. Only one overexposure was seen in the control room this month. Rerouting of fresh air ducting to the room is underway and is expected to be completed by the end of September. In spite of investigation, no specific causes could be found for 3 of the 13 overexpostfres. * ^ Jerald Uptain * jf Attachments c: Plant Manager Department Heads D. A. Kuhn J. J. Hall 0. D. Steffey ipu j I-S H- K'T-Pr i. ;Ah1 .-c.tM-b*'-. -- sviir, : ,-.ii.--.i-: ;......... -..r. VAB.0001041351 A Date 8/2 8/5 8/6 8/10 8/13 8/14 8/15 8/19 8/22 8/24 8/24 8/25 8/29 TABLE I VCM DOSIMETRY FOR AUGUST, 1978 Job Classification 8-Hr. TWA Exposure, PPM Cause Maintenance Mechanic Vinyl Operator Vinyl Shift Supervisor Maintenance Mechanic Vinyl Utility Yard Operator Maintenance Mechanic Vinyl Operator Maintenance Mechanic Vinyl Utility Maintenance Mechanic Vinyl Operator 1.1 1.0 2.1 6.9 1.7 1.0 6.7 3.02 2.78 1.59 3.07 1.11 Inexplicable; worked in main shop al1 day. No specific cause found. Worked near leaking seal on VCM charge pump. Brushing reactor condensor. Changing VCM filters. Hooking/unhooking VCM railcar. Repairing valve on VCM Compressor. Changing VCM filters. No specific cause found. No specific cause found. Brushing reactor condensor. Cleaning up Sweco overflow. Vinyl Lead Operator 1.56 Worked in vinyl control room all day. TM -*-v ft'-- iw:trr rvr -fr-rfri. idLk..: v.lil- r h'.'- n VAB.0001041352