As I explained above, I called the number for the San Francisco office to inquire about having a mold inspection done, and how much it would cost to have that done. I don't know who I talked to, except he was very knowledgeable and he said that in order to get an estimate, I would have to give him information about where the mold was, what type of mold I thought it was, and where I lived (since they also charged by mileage). When I explained that it was black mold on the under side of the deck, mainly on the support structure; he said that I didn't need their services. If the deck was in good shape, all I needed was a handyman (wearing a mask!) sand off a little of the deck. Mold will only penetrate wood by 1/64", so a little sanding, then seal off the boards, either with a stain or paint. Once you seal it, the mold won't come back. If you don't seal it, the mold will reappear within 5 years. I was very impressed that they turned down a job like that and took the time to explain to me what needs to be done, in detail. I think this is the first time I've ever had a vendor let me go without selling me something!