5. (25 pts) While working at a wood processing treatment plant in Dudley, North Carolina, your job is the supervisor of pressure treating lumber. In working in this process of the plant, you are subject to the chemical formaldehyde. Formaldehyde average concentration is 1.3105ug/m3. Potency factor for formaldehyde is 2.1102/mg/kg-day a) (5 pts) What is your increase in cancer if you continue to work in the pressure treating process for your entire life? b) (5 pts) It is estimated that 800,000 workers in the United States in the wood processing plant similar to this plant's operation. How many deaths above the background cancer rate would be expected due to their occupation? c) ( 5 pts) Of the 800,000 workers in the wood processing plant, how many people would be expected to die of cancer? d) (10 pts) Suppose the workplace air also contains arsenic in the air with an average concentration of 0.00002mg/m3. Would the hazard quotient index suggest that this is a safe level of exposure? Rfd for formaldehyde is 0.2mg/kg-day