Gentleman: Allow me to make a comment. First, I am a 30 year OSHA veteran, retired and now run my own safety and health consulting firm. I am currently working with a client who wants to build/design a "Spray Room". Without getting into much detail, I want to make everyone aware of the fact that the applicable OSHA regulations can be confusing. There are two main concerns with this operation and addressed in the OSHA regs. 1. Health (employee) concerns addressed in both 29 CFR 1910.94 (ventilation) and 29 CFR 1910.1000 (Chemical-Allowable Limits).
2. Safety (building structure-property damage) addressed in 29 CFR 1910.107 (Spray Painting Operations). You have to be very careful in the design and operational procedures. To confuse it a little more, complying with one regulation does not automatically bring you in compliance with the other, and once you ensure the inside is in compliance, you then have to ensure whatever you are dumping outside (ventilating) complies with Local and National EPA regs. Not to confuse the issue, but these are valid concerns you must be aware of. If you have any questions, you can email me at: jpleseganich@msn.com. I check my email daily, but may not check this site often. Take care.