Not knowing your location makes it difficult to give you a good answer for a company to do the evaluation. However you might want to look at making sure at least one supervisor has completed the OSHA #511 General Industy Outreach course and something like the National Safety Council's Fundametal of Industrial Hygiene, that might provide you with the in house capability for an ongoing evalluation of chemical exposure. If that isn't what you're looking for you might check the National Safety Council website for consulting services. Also the OSHA website has a variety of e-tools and program templates that might be of help.
Source: http://www.nsc.org/products...