Ken J, The National Small Flows Clearinghouse (NSFC) published the result of a study performed on several hundred Aerobic Treatment Systems (ATS) in West Virginia. The paper is in one of the year 2000 issues of the NSFC Small Flow Quarterly Magazine. The NSFC Website address is:
http://www.nesc.wvu.edu/nsfc/NSFC_Publications.html
I recommend that you read this study before you decide to invest in this high cost, energy intensive, alternative on-site sewage treatment system. JWA
[Edited by John Aldrich on 13 August 2001]