R18-9-B205. Treatment Performance Requirements for an Existing Facility

For a sewage treatment facility that is an existing facility defined in A.R.S. § 49-201(18), the BADCT shall conform with the following: 1. The designer shall identify one or more design improvements that brings the facility closer to or within the treatment performance requirements specified in R18-9- B204, considering the factors listed in A.R.S. § 49- 243(B)(1)(a) and (B)(1)(c) through (h); 2. The designer may eliminate from consideration alternatives identified in subsection (1) that are more expensive than the number of gallons of design flow times $1.00 per gallon; and 3. The designer shall select a design that incorporates one or more of the considered alternatives by giving preference to measures that will provide the greatest improvement toward meeting the treatment performance requirements specified in R18-9-B204.