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Oklahoma Administrative Code (Last Updated: March 11, 2021) |
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TITLE 252. Department of Environmental Quality |
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Chapter 656. Water Pollution Control Facility Construction Standards |
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Subchapter 27. Water reuse |
SECTION 252:656-27-4. Distribution systems
Latest version.
- (a) Cautionary language required. The following cautionary language is required for reclaimed water piping, valves, outlets and appurtenances in distribution systems.(1) Effective July 1, 2012, all reclaimed water piping, valves, outlets and appurtenances in distribution systems shall be colored purple (Pantone 522).(2) Effective July 1, 2012, reclaimed water piping in a distribution system shall be embossed or integrally stamped on opposite sides every 3 feet with a warning that includes the following language: "CAUTION: RECLAIMED WATER-DO NOT DRINK."(3) All reclaimed water piping installed prior to July 1, 2012, that does not comply with this subsection shall, at a minimum, be identified with above-ground signs containing the cautionary language in (2) of this subsection together with the international "Do Not Drink" symbol:(A) every 300 feet;(B) at every change in direction;(C) in the road easement on both sides of the road at every road crossing; and(D) at every outlet.(b) Hose bibs and yard hydrants. Hose bibs shall be located in locked, below-grade vaults. Reclaimed water hose bibs, yard hydrants and/or similar outlets shall be equipped with a warning sign containing the cautionary language required in (a)(3) of this Section.(c) Distribution pipes. Reclaimed water distribution pipes shall be designed and constructed to meet the requirements for sanitary sewer pipes in of 252:656-5-2, 252:656-5-3, 252:656-5-4 and 252:656-5-5.(d) Pumping stations and force mains. Pumping stations and force mains shall be designed and constructed in accordance with 252:656-7-1 through 4, with the following exceptions:(1) Pump openings less than three inches (3") may be allowed when settled or filtered reclaimed water is pumped.(2) Water reuse systems with the ability to divert all reclaimed water to the wastewater's permitted discharge point, without operator assistance, may be exempt from the requirement to equip the lift station with emergency wet well storage, backup power supply or duplicate pumps.(e) Reclaimed water flushing system. Reclaimed water distribution systems shall be designed with all appurtenances necessary to adequately flush the distribution system to prevent slime growth and the regrowth of pathogens. Flushing plans shall be developed for all reclaimed water distribution systems and submitted for DEQ approval. Flushing plans shall also be included in reclaimed water systems' O&M manuals [see 252: 656-3-10] and in suppliers' DEQ approved inspection programs [see 252:627-1-5(f)]. All flushing systems shall include at a minimum:(1) provisions for disposal of flushed water that prevent bypasses and discharges to waters of the state or elsewhere; and(2) air gaps designed pursuant to 252:656-9-2 for all discharges to sanitary sewers.