Kerry Clark wonders about the Maryland legality of ETO for sterilzing AFB-contaminated equipment. Since the agency doing the work is the Maryland Department of Agriculture (and they own the chamber), I would consider it highly unlikely that they are doing anything illegal under U.S. or state law. Everyone I know (including myself) who has used the chamber has reported good results. If there is general interest in the process, I will try to get our State's Chief Apiary Inspector to write a few words on ETO fumigation, which I can then post. But, according to Kerry, it appears that what our Canadian friends need to know about the ETO process is that it's illegal for them. Be thankful you have Formic Acid for mites (we don't). W. G. Miller Gaithersburg, MD Gathersburg, MD