Your company has several employees who are working along a conveyor line to clean up an over spill of product by manually shoveling the materials. The conveyor belt is located outdoors and will take several days to clean up. Given the following data Wet Bulb Temperature = 88°F; Dry Bulb Temperature = 93°F; and Globe Temperature = 91°F, calculate the WBGT Index.

Due to the heat, the employees are only exposed for 190 minutes at this temperature over an 8-hour workday. Assume a 75°F exposure for the remaining 290 minutes.

Provide a recommendation on the work/rest cycle. Include any assumptions in the analysis.