Document 3JN9BzQpX470dYQRJgr1Q3QED

Interoffice Communication To From A. H. Sather J. V. Uptain Date April 6, 1977 Subject MARCH, 1977 SUMMARY OF VCM PERSONNEL DOSIMETRY Foilwing is the VCM personnel dosimetry summary for March, 1977. Sampling frequency was reduced by approximately 67% on March 1st, according to plan. 17 samples were taken, with one result above 1.0 ppm. Range, PPM Number % 0. 0-0.5 0. 5-1.0 1.0-5.0 5.0+ 15 88.24 1 5.88 1 5.88 0 0.00 17 100.00 The overexposure of 1.01 ppm occurred to a Vinyl Reactor Shift Supervisor, who was engaged in preparing a VCM transfer pump for maintenance work. He was wearing a supplied air respirator at the time. A shift in the sampling results distribution occurred as expected (see attached "Personnel Dosimetry Trends" plot). jf Attachment c: GGD, DEPT. HEADS Houston, ODS - Ponca City SAL 000108396