I posted this in the General Forum but it may be valuable (and easier to find) here.
If you are going to attempt to do your own system READ THIS BOOK FIRST as you have a responsibility to your own health and the health of the environment.
That said, this isn't rocket science. Lloyd Kahn and folks do a great job of explaining both the science and art of poop management in a fully "engrossing" manner.
The Septic System Owner's Manual, by Lloyd Kahn, Blair Allen and Julie Jones. From Shelter Publications in Bolinas, CA, www.shelterpub.com (http://www.shelterpub.com/_shelter/_septic/bulletin_board.html)
(https://i56.photobucket.com/albums/g166/jraabe/septic.jpg)
Where was this book when Nethog got started earlier this year? lol