Document 3eGgM9VD5rkRnVxO5BJNxeQq0

uf a> Dfri PAMESVIIiE AUl SJUIPUNG PROGRAM Sumary of Results to Date "ny 15* 1973 R b C EIV " D 13/j<.j \ MEDICAL DEPARTMENT A program to sample and an&Jyze the atmosphere in the work ing areas of the plant where employees night be exposed to monomer Vapors was begun in Deoaaber* 1972# using sampling equipment brought to Paines* ville by Dr0 t/ D. Harrisb Purchase of our own sampling equipment and new chromatograph columns has* with the assistance of sampling by the Process Engineers* resulted in a more detailed survey of atmospheric composition* The data are presented in the attached table* Due to priority given to a TUP sampling program for the past several months* the chromatograph has not been available much of the time to run analyses for Viqyl chloride in the atmosphere* Xt 13 planned that a second chromatograph will be purchased to allow each instrument to be dedicated to a single use* This will avoid the excessive change over time currently encountered when switching from one column to another* Also tabulated below are data obtained on vapor samples in and around certain pieces of equipment where explosive mixtures might developo This work was done at the reqaest of the Vinyl Chloride Safety Association* The lower explosive limit for vinyl chloride is 1$ by vol ume or 82*500 ppm by weight in air* Hone of the areas sampled showed any danger from readying the lover explosive limit* The TLV for vinyl chloride was exceeded in only one area where personnel work; That was Inside an SD reactor during clcaningo This result cannot be said to be typical* Other areas over the 200 ppm TLV were bank and dryer exhaust streams where personnel are not located* The TLV for viryl acetate was grossly exceeded in the area around the Derrick screen while running Marvinol 56 As Is the case with reactor oloaning, however, personnel are in this atmosphere for a relatively short time The TLV for THF was also greatly exceeded in the area around the Rototherm and again this is not an area normally populated* URL 13465 CBl/twp Attachment CCs BRL tnu CHK HAM HClf MCJ QJH Rl/K REH CJU JDP ^"br. U D, Harris - Oxford