I have a hard time understanding the thought process of jumping into the middle of something that one has very little understanding and less training. I do Mold Assessment work as my profession. I just do not understand what the thinking is except that it is a revenue souce for ProLab to market a petri dish that one sets out on the counter and then sends into the lab for reading. What you get back from them is useless information - there are mold spores floating all around you all the time indoors and out. What settles into the petri dish just happens to be what is floating around and some or perhaps most of what settles came in the front door with you. Testing without a reason is a useless effort and the results will have no meaning especially if you do not understand what your reading.

I would suggest that you if you need to direct your client to the store let them purchase what ever kit/kits they want and conduct whatever the tests require and let them struggle with the results - The further you stay away from all of that the better you will be. When the results come in and they call you direct them to to the American IAQ Council website and find someone qualified in their area to help them. 1-800-942-0832 The American Indoor Air Quality Council

I have not directed any of this toward you personally just think that the best help for someone is to be talking to someone that can really help them.

Regards
Greg D. Dames
National ThermoGraphic Inspections
Pacific Mold Assessment