Document 6bbBvRKbKRypXd1erNB1xNGb4

Building B-101 Dow U.S.A. The Dow Chemical Company 2301 N. Brazosport Blvd Freeport, Texas 77541-3257 OCCUPATIONAL HEALTH SUMMARY REPORT LOCATION: PERIOD COVERED: CHLORINATED ETHANE PRODUCTS CONTRACTORS July 8 -12, 1991 MEDICAL: C. K. Browdy, M.D. / Occupational Health Associate ItztU Date INDUSTRIAL HYGIENE: 'K)A: M. A. Blue Industrial Hygienist 11-13- 5 / Date APPROVED: Director, Occupational Health // - /J -f/ Date REVIEWED: cc: D. E. Cragar J. H. Saunders, M.D. J. H. Lippman Summary File Date OCCUPATIONAL HEALTH SUMMARY REPORT This is a voluntary participation program. Four individuals have been identified as having one or more years work experience in the Chlorinated Ethane Products area. Four individuals were examined between July 8-12, 1991, for a 100% participation rate. The Chemical and Physical Agent Inventories (CPAI) for Chlorinated Ethanes products (CEP), CEP Maintenance, CHLOROTHENE* Solvents, CEP Process Development Lab, Beta Tri/Vinylidene, and CEP Unit Services show that the chemical and physical agents of greatest concern are 1,1,2-trichloroethane, 1,1,2,2-tetrachloroethane, 1,1dichloroethane, 1,1,1,2-tetrachloroethane, vinylidene chloride, chlorine, ethylene dichloride, methyl chloroform (technical), Prelete, Aerothene TT Inhibitor, CHLOROTHENE* Industrial Solvent, CHLOROTHENE* SM, DOWCLENE* LS Solvent, Aerothene TT, ethyl , chloride, 1,4-dioxane, vinyl chloride, 1,1,1-trichloroethane, asbestos, cristobalite (SI02), quartz, and noise. Based on a review of current Industrial Hygiene monitoring data described below , the Boilermaker/Welder and Painter job classifications are followed on the Noise Medical Surveillance Requirement (MSR). The Control C Operators, PRG Control C Operators, and the Control B Operators will be followed by liver profiles because of exposure to vinylidene chloride above the Threshold Limit Value for two years. The remaining job classifications will be followed on the periodic core examination. The 1990 Industrial Hygiene monitoring data is summarized in I. H. Report No. A24-3447-90C. Eight-hour time-weighted average exposures for vinyl chloride, vinylidene chloride, 1,1-dichloroethane, 1,1,1-trichloroethane, ethylene dichloride, 1,1,2-trichloroethane, 1,1,1,2-tetrachloroethane, and 1,1,2,2-tetrachloroethane were well below the recommended exposure guidelines. Short-term personal exposures were monitored during specific job activities including vinylidene chloride drumming and tank car loading procedures, line openings, and methyl ether hydroquinone (MEHQ) addition. Exposures were within acceptable guidelines for all chemicals except vinylidene chloride. The acceptable guideline for vinylidene chloride was exceeded during vinylidene chloride drumming and tank car loading, filter changing, and during MEHQ addition. Full face air purifying respirators with organic vapor/acid gas cartridges (OVAG) CO NFIDENTIAL r &s i 50972 Chlorinated Ethane Products Page 2 were used during the opening of the MEHQ additive pot and half face air purifying respirators with OVAG cartridges were used during vinylidene chloride drumming. After the monitoring data was received, the use of full face airline respirators was implemented for vinylidene chloride drumming. The 1988 Noise Survey is summarized in I. H. Report No. A243126CN. Personal eight-hour time-weighted average exposures were less than 85 decibels on the A-scale for all monitored job classifications except the Painters and Boilermaker/Welders. The Painters and Boilermaker/Welders are in the Texas Operations Hearing Conservation Program. There are 19 TSCA 8(d) chemicals present. They are asbestos, 1,1,2trichloroethane, 1,1,2,2-tetrachloroethane, 1,1-dichloroethane, 1,1,1trichloroethane, 1,1,1,2-tetrachloroethane, ethylene dichloride, hexachlorobutadiene, perchloroethylene, ethyl chloride, 1,3dioxolane, dimethoxymethane, chloroform, methylene chloride, hydroquinone, phenol, toluene, methyl ethyl ketone, and methyl isobutyl ketone. There were four audiograms done. There were no standard threshold shifts as defined by the OSHA Noise Standard. One individual has limitation of respirator usage based on initial screening of the medical examination data. Please see the attached list for medical limitation of respirator usage. If these medical restrictions interfere with an individual's job requirements, further evaluation should be arranged to fully assess the need for medical limitation of respirator usage. The liver is considered the main target organ for vinylidene chloride and the other chlorinated hydrocarbons present. One individual of the four tested had minimal elevation of two of the five liver enzyme tests done. This individual has a medical reason for these minimal elevations. Attachment Trademark of The Dow Chemical Company C O N F ID E N T IA L cn oi o co co*-4 ATTACHMENT November 11, 1991 MEDICAL LIMITATION OF RESPIRATOR USAGE may wear a respirator for escape only. The following three individuals have no medical limitation of respirator usage: