Go to the EPA site and look in the "verified technologies" section...I posted this site earlier and I'll dig it out and send it to you...
I'll also make sure it's posted in the I-Box, if it isn't already.
"the EPA does recommend technologies, like RCCH. It's through their "Verified Technologies" program where they not only recommend, but they publish the company's Verification Report, Statement Test/Quality Assurance Plans and Verification Protocols"
All verifiable facts, open to anyone...