Dioxin Registry report of the Dow Chemical Company, Midland, Michigan

The report included a description and history of the processes, personnel, and records systems found during an evaluation of the operations at the Dow Chemical Company (SIC-2865, SIC-2869), Midland, Michigan. From 1935 to 1983, the company produced several chemicals including, 2,4,5-trichlorophenol (2,4,5-TCP), several derivatives of 2,4,5-TCP, pentachlorophenol (PCP), and several derivatives of PCP. The company records for general personnel, medical, workers' compensation, industrial hygiene and analytical dioxin data provide an excellent base from which work histories can be constructed and potential exposures to 2,3,7,8-tetrachlorodibenzo-p-dioxin (1746016) (TCDD) and hexachlorodibenzo-p-dioxins can be estimated. Area and personal air samples showed that workers involved in the production of these chemicals were exposed to the raw materials, intermediates, products, and more than likely waste materials. Surface wipe samples indicated the potential for skin exposure as well. Workers who worked in one or more of the processes with potential exposures were considered suitable for inclusion in the Dioxin Registry.