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Lake Shore ‘s View on Ventilation Lake Shore ‘s View on Ventilation meaning importance design training testing conclusion and considerations 2

- Ventilation is the renewing and circulating of a supply of fresh air in an interior space. This process can be done naturally (open doors and windows), mechanically (fans) or both. 3

-low workplace morale and higher absenteeism -tiredness, lethargy -headaches -dry itchy skin and eye irritation 4

Lake Shore’s cutting room contains three(3) core saws which are in operation 5-6 days per week. Good ventilation is produced with two(2) exhaust fans and two(2) replacement air intakes. The two fans can move air at 1770 cubic feet per min. The cutting room is 3360 cubic feet. This gives us a good air exchange rate. 5

6 two (2) industrial rated exhaust fans two (2) replacement air intakes three (3) core saws

- Each saw is equipped with a shop-vac. The intake hose is attached to the hood while the vacuum exhausts directly outside. - each core cutter undergoes quantitative fit testing with a half mask style respirator (MSA, North) with replacement particulate filters (P 100) and trained in the selection, care and use. - Direction and quantity of water used during the cutting process also controls the amount of air contaminants. 7

8 properly fitted mask large capacity shop-vac

Having a ventilation in place will not mean a thing unless it is used and used properly. Part of LSG’s training includes an explanation as to how to and why to use the ventilation system in the cutting room. A prevention measure requesting employees to perform inspections and cleanings ensures the system runs and will continue to run efficiently. 9

- The cutting room at LSG has gone through many changes over a few years which included adding a saw and operator. We needed to ensure the ventilation system still operated efficiently. A smoke test was performed and it was indicated our system functions extremely well. So well, air sampling units were set up and should those results validate the operation of the ventilation system, masks may not be needed to be worn by the cutters, increasing the level of comfort in the workplace. 10

Please keep in mind this presentation is based on LSG’s view on ventilation and the steps we have taken to improve the IAQ of our cutting room. Ventilations needs will vary but some things to consider when designing a system should include; -size of room -amount of contaminant generating equipment -number of operators -positioning of fans -positioning of air intakes 11

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