Document VJDQNkNDzeQaa1D1Ea0Zq3bop

Mr. R. W. Sailer January 10, 1975 Mr. M. E. Eisenhour VCM Exposure Leva La, Sue pens ion/Non-Solvent Vinvle Department Based on eight-hour TWA personnel monitoring results, observations and data from vinyl chloride VFA analyzer, the following statements can be made for the Suspension/Non-Solvent Vinyl Area at Texas City. The unit Is not meeting the 8-hour TWA limit of 1 ppm as proposed in the OS HA permanent standard. The estimated work place exposure has normally been about 5-10 ppm. Recent Incomplete data obtained since equipment revisions to stop routine releases of several VCM containing streams to the atmosphere indicate substantial improvement to below 5 ppm. Additional experience and data are needed to verify this. Specifically, the typical workplace exposure levels are normally as follows: Bldg. 120/174 Control Rooms; less than 1 ppm. Suspension Autoclaves, second level: less than 5 ppm. Suspension Autoclaves, first level: less than 10 ppm. Non-Solvent Autoclaves, second level: less than 5 ppm. Non-Solvent Autoclaves, first level: less than 5 ppm. Compressor Room: less than 10 ppm less than 25 ppm at 95 percent of time (problem area). Tank Area 4: less than 5 ppm less than 25 ppm at 97 percent of time. UCC 091107 VCM Exposure Levels, Suspeas ion/Non-Solvent VinVls Department 2. Drying Area (outside): less then 10 ppm (besed on carbon tube data only). Pilot Plant; less than 5 ppm * less than 25 ppm at 99+ percent of time. UCC 091108