Arizona Administrative Code for Onsite Wastewater Treatment Systems which is part of the Aquifer Protection Permit Program: Title 18. Environmental Quality, Chapter 9. Department of Environmental Quality - Water Pollution Control, Articles 1, 2, 3, 4
Paper copies
Available through Secretary of State, Public Services Division, 1700 W. Washington Street, Floor 7, Phoenix, AZ 85007-2808
Cost ~$14, current price list of all Arizona Administrative Code (A.A.C.) Titles and Chapters is available online