Section 64585 - Design and Construction(a) Each distribution reservoir shall meet the following: (1) Any reservoir coatings or linings shall be installed in accordance with manufacturer's instructions;(2) Vents and other openings shall be constructed and designed to prevent the entry of rainwater or runoff, and birds, insects, rodents, or other animals;(3) At least one sampling tap shall be available to enable representative sampling of the water in the reservoir that will be entering the distribution system; the tap shall be protected against freezing, if necessary; and(4) A reservoir shall not be designed, constructed, or used for any activity that creates a contamination hazard.(b) The water supplier shall submit to the State Board for review the design drawings and specifications for each proposed distribution reservoir prior to its construction. Each new distribution reservoir shall be: (1) If it is a tank, constructed in accordance with American Water Works Association (AWWA) standards, which are hereby incorporated by reference, as follows: AWWA D100-05 (Welded Carbon Steel Tanks for Water Storage), D102-03 (Coating Steel Water-Storage Tanks), D103-97 (Factory-Coated Bolted Steel Tanks for Water Storage), D110-04 (Wire-and Strand-Wound, Circular, Prestressed Concrete Water Tanks), and D120-02 (Thermosetting Fiberglass-Reinforced Plastic Tanks);(2) Constructed of an impervious material that prevents the movement of water into or out of the reservoir;(3) Covered with (A) A rigid structural roof made of impervious material that prevents the movement of water or other liquids into or out of the reservoir; or(B) A floating cover designed, constructed, and maintained in conformance with the AWWA California-Nevada Section's "Reservoir Floating Cover Guidelines" (April 1999), AWWA Manual M25 (2000), and AWWA D130-02 (Flexible-Membrane Materials for Potable Water Applications), which are hereby incorporated by reference.(4) Equipped with at least one separate inlet and outlet (internal or external), and designed to minimize short-circuiting and stagnation of the water flow through the reservoir;(5) Equipped with drainage facilities that allow the tank to be drained and all residual sediment removed, and an overflow device. The reservoir drainage facilities and overflow device shall not be connected directly to a sewer or storm drain and shall be free of cross-connections;(6) Equipped with controls to maintain and monitor reservoir water levels;(7) Equipped to prevent access by unauthorized persons;(8) Designed to allow authorized access and adequate lighting of reservoir interior for inspections, cleaning or repair;(9) Equipped with isolation valves, and designed and operated to allow continued distribution of water when the reservoir is removed from service. The isolation valves shall be located within 100 feet of the reservoir. For a reservoir used to meet the disinfectant contact time requirements of chapter 17 (Surface Water Treatment), bypass lines shall be blind-flanged closed during normal operations;(10) Designed and constructed to prevent the entry of surface runoff, subsurface flow, or drainage into the reservoir;(11) Designed to prevent corrosion of the interior walls of the reservoir;(12) For a subsurface reservoir, (A) Protected against flooding (both reservoir and vents);(B) Equipped with underdrain facilities to divert any water in proximity to the reservoir away from the reservoir;(C) Sited a minimum of 50 feet horizontally from a sanitary sewer and 100 feet horizontally from any other waste facilities and any force main;(D) Constructed so as to have the reservoir bottom located above the highest anticipated groundwater level, based on a site investigation that includes actual measurements of the groundwater level during peak rainfall periods; extraction wells shall not be used to influence the highest anticipated groundwater level;(E) Provided with a minimum of two groundwater level monitoring wells drilled to a depth at least 20 feet below the reservoir bottom and sited within 100 feet and on opposite sides (upgradient and downgradient) of the reservoir; and(F) If the roof is to be buried and have a function (e.g., recreation, landscape, parking) in addition to covering the reservoir: 1. Designed and constructed pursuant to AWWA D110-04 (Wire-Strand-Wound, Circular, Prestressed Concrete Water Tanks), which is hereby incorporated by reference;2. Equipped with an impervious connection, such as a pvc waterstop, between the wall and buried roof; and3. Watertight, sloped for drainage and coated with a damp proofing material.Cal. Code Regs. Tit. 22, § 64585
1. New article 6 (section 64585) and section filed 2-8-2008; operative 3-9-2008 (Register 2008, No. 6).
2. Change without regulatory effect amending subsection (b) and NOTE filed 6-2-2015 pursuant to section 100, title 1, California Code of Regulations (Register 2015, No. 23). Note: Authority cited: Sections 116271, 116350 and 116375, Health and Safety Code. Reference: Sections 116275, 116375 and 116535, Health and Safety Code.
1. New article 6 (section 64585) and section filed 2-8-2008; operative 3-9-2008 (Register 2008, No. 6).
2. Change without regulatory effect amending subsection (b) and Note filed 6-2-2015 pursuant to section 100, title 1, California Code of Regulations (Register 2015, No. 23).