Document 0gRZ5R0VMoz699BYb0JawYjJM

FROM!UISTA MFG HOUSTON YUto Chemical Company TO: UINVL INSTITUTE 900 ThnftodftMdlo Houston, T#koi 77079 (713) 588-3000 r7u 9.0. Box 19079 Houston, Texas 77224 Fox (713} 568*3236 1 July 5, 1990 A tO. T* OX DfcBATdO UDOK1N6 Meredith Scheck The Vinyl Institute 155 Route 46 West Wayne, NJ 07470 tOOUt-O ~ cottar Mo\j Dear Meredith, We are being told by the State of Mississippi the unit risk factor for VCH is 4.2 x 10'5/inicrograa/in^. Multiplication of the unit risk factor by the fcnceline concentration provides a worst case estimate of risk from a particular facility. As state air toxic programs become prevalent, the unit risk factor will bo more of an issue. I am interested in others' experience or knowledge on what factor is being used to estimate risk from their facilities. If you could poll the members 1 would appreciate it. Sincerely, \ Joe Ledvina 1 VAB.0001154170