Boston Environmental & Engineering provided us quick and professional response regarding to our request, their associated staffs coordinated the whole test & analysis process in a very organized and corresponded way. Their staff came in with good responsibilities, provided us very useful chemical information, and instructions based on our conditions, let us know should there be any rooms for further improvements. Also, they took samples carefully and tried good efforts to make things in a very organized way. Combined both samples and the lab result, they put all these info into the report to make it clear and professional to tell us the current conditions about our operation and should there be any future rooms for improvement. In general they did a great job on this air quality investigation, and we do recommend their service!