Document 6BqGaax0Z9o7kRkO8oRnLOvko

CHEMICALS INDUSTRIES /INTEROFFICE LAKE CHARLES TO Phil Trew FROM ^ob McCorquodale DATE SUBJECT February 15, 1978 VDC/VDCM Exposure Hope this is what you had in mind: Areas or jobs that, in the past, offer a high risk for exposure to VDC/VDCM: EDC/MC Lead Operator - MC Operator - EDC/MC Auxiliary Operator Shipping Department Loader - Loader Helper. Sample round (Aux.) - Running hqome sample (Aux.) recharging hqimne tank (Aux.) - Clearing DH S VDCM still retailers (L.O. and MC operator) >- Phasing off H2O on DH, VDCM, and VDC still reflux drums - (MC Oper.) Unplugging hqmme addition rotomaters (MC 8 L.O) Unplugging seal flush rotomaters on VDC S VDCM pumps - (L.O. 8 M.C.) Clearing of vessels for entry and or repair - (MC S L.O. & Aux.) Breaking into vessels for repair - (Maintenance) - Blasting tubes, vessels and lines - (Hydrotest - 777) Routine loading - (Loader & Loader Helper). The frequency on these jobs vary from every two hours for sampling to several months for reboiler cleaning. The exposure is obviously determined by procedure and care. The results from monitoring should define the truly hazardous areas. Please call if I can be of any further help. BM/bb SL 084824