Document Y9GQK94J3D5aVn4evyzM1w9KN

DOW CHEMICAL U.S.A. December 11, 1981 LOUISIANA DIVISION P. O. BOX ISO PLAQUEMINE. LOUISIANA 70764 604 3B6-8000 \ i To: J. D. Weldon Cy Barrios Ron Usle Bill Ledford LHC I Vapor Monitoring For Benzene - 12-8-81 Classification * Lab Material Controller Operation Specialist Sr. Operator Tech. Janitor S. Supervisor Operation Spec. /L' William Herrick Lab - LHC III ss 8 Hour TWA PPM Benzene 0.03 0.0l< 0.09 0.33 0.01 0.06 0.07 roH o* PPM Toluene 0.01 0.01 0.05 .01 0.01 0.01 V: N DO 097852 CONFIDENTIAL AN operating UNIT OF THE DOW CHEMICAL COMPANV