Document n9GnrogB3GzEmQavpEk07zBpz

Interoffice Communication To A. H. Sather From J. V. Uptain Date April 27, 1979 Subject VCM DOSIMETRY - MARCH, 1979 conoco Following are the results of VCM dosimetry during March, 1979. 74 samples were taken, 7 (9.5%) of which indicated overexposure. Range, PPM 0.0 - 0.5 0.5 - 1.0 1.0 - 5.0 5.0+ No. Samples 60 7 6 1 74 1 81.08 9.46 8.11 1.35 100.00 Details of the overexposures are shown in the attached table. The Honeywell Continuous Monitor strip chart was examined for comparison against the 3/10/79 result of 1.2 ppm. The chart showed no evidence of VCM in the control room on that, day. herald V. Uptain jf Attachments c: Plant Manager, Department Heads D. A. Kuhn, J. J. Hall, 0. D. Steffey |Wj II4&IP. |: I -h-j VAB.0001041321 - Ii*iifri TABLE I VCM OVEREXPOSURES FOR MARCH, 1979 Date 3/2/79 3/10/79 3/12/79 3/16/79 3/17/79 3/27/79 3/29/79 Job Classification Maintenance Mechanic 8-Hour TWA Overexposure, 2.5 Vinyl Reactor Lead Operator 1.2 Maintenance Shift Mechanic 1.0 Maintenance Mechanic 1.7 Vinyl Reactor Chief Operator 6.2* Vinyl Dryer Utility 16.4* Vinyl Dryer Operator 1.7 * Respiratory protection worn during overexposure. A Cause Specific cause not discovered. Worked in control room entire period. Repaired #2 Centrifuge (V-10 area). Specific cause not discovered. Specific cause not reported. Changed VCM filters and flushed out blowdown tank. Specific cause not discovered. VAB.0001041322