Representative TDI air sample data from the cutting area for a 6-week period between November and December 2010 is shown in Figure 1. While most levels are below the LOD (0.1 ppb), brief intermittent TDI exposures were noted, the majority of these below 5 ppb. A 6-day period within the 6-week period shows several peak exposures in the cutting area on production days between 10 am and 2 pm(peak production time periods) and non-detectable airborne TDI levels during non-production hours (e.g. weekends). Consistent with the fixed- point air sample monitoring, the limited personal quantitative air sampling performed on 7 different workers in the foaming hall and cutting area all showed TDI levels below the LOD (data not shown).