I have a vehicle maintenance garage. It has a typical two exhaust system configuration. The main MUA and associated exhaust fan control the level of CO, NOx, etc. in the space such that the level of contaminates never gets to toxic levels. The second exhaust system consists of snorkels that directly attach to the vehicle exhaust pipe. This system doesn't dilute the exhaust therefore Exception c., "Systems exhausting toxic, flammable, paint, or corrosive fumes or dust".

I am of the opinion that the general make-up air and exhaust system controls the system such that the exhaust is not at the point of being toxic and the exception doesn't apply?

Christopher R Jones, P.Eng.
T+ 1 416-644-0252

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