Section 58.01.17.605 - REUSE FACILITY: DESIGN AND CONSTRUCTIONThe design and construction of new reuse facilities, or existing facilities undergoing material modification, must comply with these rules and applicable provisions of IDAPA 58.01.16, "Wastewater Rules."
01.Distribution Pipelines. a. Recycled water mains are treated as non-potable mains when considering their separation from potable water mains. Recycled water mains are treated as potable water mains when separated from sewer mains.b. When a system proposes using an alternative to the distribution pipeline requirements in these rules, IDAPA 58.01.08, "Idaho Rules for Public Drinking Water Systems," or IDAPA 58.01.16, "Wastewater Rules," the design engineer submits data to the Department for review and approval to demonstrate that installing an alternative will protect human health and the environment.02.Pumping Stations. a. Protect potable water used as seal water for recycled water pump seals from backflow using a Department-approved backflow prevention device or air gap.b. Ensure no direct connection is made between the potable and recycled water system. If it is necessary to put potable water into the recycled water distribution system, provide a Department-approved reduced pressure principal device or air gap to protect the potable water system.c. Equipment or facilities such as tanks, temporary piping or valves, and portable pumps used or considered for use with recycled water may not be used with potable water or sewage. Any equipment or facilities such as tanks, temporary piping or valves, and portable pumps used or considered for use with sewage may not be used with recycled water or potable water.03.Requirements for Class A Recycled Water.a. Distribution System. i. Where Class A recycled water will be provided by pressure pipeline, use the following guidance: current edition of "Recommended Standards for Wastewater Facilities - Great Lakes-Upper Mississippi River Board of State Sanitary Engineers," "AWWA Manual M24" Chapter 4 for dual water systems, and current edition of "Idaho Standards for Public Works Construction."ii. Irrigation systems proposed for conversion from non-Class A recycled water to Class A recycled water use will be reviewed on a case-by-case basis to evaluate the protection of human health and the environment. (1) Existing water lines converted to use with Class A recycled water or a combination of Class A recycled water and irrigation water must be accurately located, pressure tested, and leakage tested before conversion in coordination with the Department. Use AWWA Standard(s) for pressure and leakage testing of drinking water lines to be converted.(2) Physically disconnect the pipeline from any potable water lines and bring into compliance with applicable cross-connection rules as stated in IDAPA 58.01.08, "Idaho Rules for Public Drinking Water Systems" and meet minimum separation requirements.(3) If the existing lines meet water supplier and Department approval based on these rules, the lines will be approved for Class A recycled water distribution. If compliance of the system (accurate location, pressure testing, and verification of no cross-connections) cannot be verified with record drawings, testing, televising, or otherwise, uncover the lines and inspect, identify, or otherwise verify compliance to the Department's satisfaction before use. Retrofit accessible portions of the system to meet the provisions of these rules.(4) After converting the water or irrigation line to a Class A recycled water line, mark the lines as stated in Subsection 603.01.a.iii.iii. If either an in-line type or end-of-line type blow-off or drain assembly is installed in the system, submit a plan for proposed discharge locations to the Department for review and approval.iv. Mixing Class A recycled water with other irrigation waters may be conducted pipe-to-pipe if both the other irrigation water source and the Class A source are protected by Department-approved backflow devices. Class A recycled water may be mixed with other irrigation water in an unlined pond if the Class A recycled water is permitted for ground water recharge. Class A recycled water that is permitted for irrigation only and not ground water recharge may be mixed with other irrigation water only in a lined pond. Water from these mixed ponds may then be used for permitted Class A uses.v. Operators of Class A recycled water distribution systems, including operators of distribution systems that use a combination of Class A recycled water and other irrigation waters, operators of the distribution system from the wastewater treatment plant to the point of compliance or point of use or point of sale, as applicable, and operators employed by buyers of the Class A recycled water for subsequent use, including home occupants, must sign a utility user agreement from the utility providing the Class A recycled water that states the user understands the origin of the effluent and the concept of agronomic rate for applying the Class A recycled water. Include these requirements in contracts for sale of Class A recycled water for subsequent use. Individual homeowners are allowed to operate or maintain Class A recycled water distribution systems. Providers of the Class A recycled water must offer a public education program within its service area to teach potential customers the benefits and responsibilities of using Class A recycled water.b. Surface water features, such as landscape impoundments used for Class A recycled water, that are not lined or sealed to prevent seepage may be approved if ground water quality standards for ground water protection are met.c. The Department approves the use of the following filter technologies to comply with these rules:i. Technologies approved and listed in the State of California Alternative Treatment Technology Report for Recycled Water.ii. The Department may approve filtration technologies other than those referenced in Subsection 605.03.c.i. if a written request is submitted with the product information. Approval of these filtration technologies will be in accordance with procedures in the State of California Alternative Treatment Technology Report for Recycled Water.d. The Department may require certain types of Class A recycled water filtration facilities to install and operate a filter-to-waste system that operates each time a filter starts up. Filter-to-waste systems automatically filter to waste until the effluent meets the required turbidity standard.e. Reliability and Redundancy Standards. i. Treatment systems must treat maximum day flow for the season in which Class A recycled water is produced and provide one (1) of the following alternative back-up systems: (1) Another permitted disposal option; or(2) Diversion to adequate lined storage capable of storing Class A recycled water during a malfunction or emergency.ii. An alternative back-up system is automatically activated if turbidity exceeds or chlorine residual drops below the instantaneous required value for more than five (5) minutes, or if the alternative filtration/disinfection system is not achieving its required 5-log removal/inactivation of virus for more than five (5) minutes. The maximum number of times a facility could exceed on this basis is twice in one (1) week, and both times must be immediately reported. Failure to report or exceeding more than twice in one (1) week are sufficient grounds for the Department to shut down the system for inspection and repair.iii. Redundant monitoring equipment and automatic by-pass equipment must be provided.iv. Standby power is sufficient to maintain all treatment and distribution works or to meet the requirements for an alternative back-up system for the Class A recycled water facilities. f. New Class A recycled water systems defined as public utilities in Sections 61-104 (Corporation), 61-124 (Water System), 61-125 (Water Corporation), and 61-129 (Public Utility), Idaho Code, are governed by and must meet the requirements of Chapter 1, Title 61, Idaho Code, Public Utilities Law, and IDAPA 31.01.01, "Rules of Procedure of the Idaho Public Utilities Commission." In any conflict arising out of the application of these rules and IDAPA 31.01.01, follow IDAPA 31.01.01.Idaho Admin. Code r. 58.01.17.605