in Calif. is California Microbial in Los Angeles, Ca. THe owner is Rich Valdez. He is excellent. The mold test kits from Home Depot are not really reliable. When you open the plastic container any air that gets in can have mold. To test properly you have to test the air indoors, with the windows closed for a certain amount of time and compare it with an air sample from outside taken at the same time as the indoor sample. I'm sorry to answer so late. I just saw your post. Let me know if you're going to call him. Best wishes!