Contracted by Hickory Springs Mfg. Co. (Conover, NC), Prestige Fabricators (Asheboro, NC), Olympic Products (High Point, NC), and Foamex LP (Cornelius, NC) to conduct ambient sampling of toluene diisocyanate (TDI) near each facility. This study paralleled an ambient TDI sampling study being conducted by the Center for Disease Control (CDC) and the North Carolina Department of Health and Human Services (NCHHS). Results were used to compare and contrast the results of the CDC/NCHHS study. A total of 63 days were sampled for all locations using a sampling protocol developed by the CDC specifically for this study. Single Point Monitors measured TDI for 8-hour and 15-minute averaging periods to ultimately collect samples on filter media prepared for a modified National Institute for Occupational Safety and Health (NIOSH) method 5525 analysis. No samples sent for analysis indicated concentrations above the Liquid Chromatography/Mass Spectrometry detection limit of 0.005 micrograms per sample.
