All chemicals added to water being treated for use in a public water system for human consumption shall comply with ANSI/NSF Standard 60. Evidence for this requirement shall be met if the chemical shipping container labels or material safety data sheets include:
(a) Chemical name, purity and concentrations, Supplier name and address, and
(b) Labeling indicating compliance with ANSI/NSF Standard 60.
(6) Storage, Safe Handling and Ventilation of Chemicals.
All requirements of the Utah Occupational Safety and Health Act (UOSHA) for storage, safe handling and ventilation of chemicals shall apply to public drinking water facilities. The designer shall incorporate all applicable UOSHA standards into the facility design, however, review of facility plans by the Director under this Rule shall be limited to the following requirements:
(a) Storage of Chemicals.
(i) Space shall be provided for:
(A) An adequate supply of chemicals,
(B) Convenient and efficient handling of chemicals,
(C) Dry storage conditions.
(ii) Storage tanks and pipelines for liquid chemicals shall be specific to the chemicals and not for alternates.
(iii) Chemicals shall be stored in covered or unopened shipping containers, unless the chemical is transferred into a covered storage unit.
(iv) Liquid chemical storage tanks must:
(A) Have a liquid level indicator, and
(B) Have an overflow and a receiving basin or drain capable of receiving accidental spills or overflows, and meeting all requirements of R309-525-23, and
(C) Be equipped with an inverted "J" air vent.
(v) Acids shall be kept in closed acid-resistant shipping containers or storage units.
(b) Safe Handling.
(i) Material Safety Data Sheets for all chemicals utilized shall be kept and maintained in prominent display and be easily accessed by operators.
(ii) Provisions shall be made for disposing of empty bags, drums or barrels by an acceptable procedure which will minimize operator exposure to dusts.
(iii) Provisions shall be made for measuring quantities of chemicals used to prepare feed solutions.
(c) Dust Control and Ventilation.
Adequate provision shall be made for dust control and ventilation.
(7) Feeder Design, Location and Control.
(a) General Feeder Design.
General equipment design, location and control shall be such that:
(i) feeders shall supply, at all times, the necessary amounts of chemicals at an accurately controlled rate, throughout the anticipated range of feed,
(ii) chemical-contact materials and surfaces are resistant to the aggressiveness of the chemicals,
(iii) corrosive chemicals are introduced in a manner to minimize potential for corrosion,
(iv) chemicals that are incompatible are not fed, stored or handled together.
(v) all chemicals are conducted from the feeder to the point of application in separate conduits,
(vi) spare parts are available for all feeders to replace parts which are subject to wear and damage,
(vii) chemical feeders are as near as practical to the feed point,
(viii) chemical feeders and pumps operate at no lower than 20 percent of the feed range,
(ix) chemicals are fed by gravity where practical,
(x) be readily accessible for servicing, repair, and observation.
(b) Chemical Feed Equipment.
Where chemical feed is necessary for the protection of the consumer, such as disinfection, coagulation or other essential processes:
(i) a minimum of two feeders, one active and one standby, shall be provided for each chemical,
(ii) the standby unit or a combination of units of sufficient capacity shall be available to replace the largest unit during shut-downs,
(iii) where a booster pump is required, duplicate equipment shall be provided and, when necessary, standby power,
(iv) a separate feeder shall be used for each non-compatible chemical applied where a feed pump is required, and
(v) spare parts shall be available for all feeders to replace parts which are subject to wear and damage.
(c) Dry Chemical Feeders.
Dry chemical feeders shall:
(i) measure feed rate of chemicals volumetrically or gravimetrically, and
(ii) provide adequate solution water and agitation of the chemical in the solution tank.
(d) Feed Rate Control.
(i) Feeders may be manually or automatically controlled, with automatic controls being designed to allow override by manual controls.
(ii) Chemical feed rates shall be proportional to flows.