§ 38-225. Requirements for interactive water amusements.

(a)

Water supply. All water utilized by the facility shall be from a potable source approved by the department and all water fixtures shall be provided with approved backflow/backsiphonage devices.

(b)

Sewage disposal. Sewage and wastewater shall be disposed of by methods approved by the department.

(c)

Facilities.

(1)

If provided, each bathhouse shall meet the following fixture schedule based on anticipated patron loads:

Commodes: 1 per 75 males; 1 per 50 females

Diaper change tables: 1 per 100 males; 1 per 100 females

Hand basins: 1 per 100 males; 1 per 100 females

Showers: 1 per 50 males; 1 per 50 females

Urinals: 1 per 75 males

Floors shall be easily cleanable and slip-resistant; carpeting is prohibited in restrooms and wet areas. Walls in wet areas shall be easily cleanable and mold and mildew resistant. Ventilation shall be adequate to prevent odors and condensation. Hose bibs shall be provided to wash floors. Adequate floor drains shall be provided to allow for good drainage. Each hand basin shall be provided with single-use soap and towels. Hot and cold water shall be provided to each basin and shower through a mixing faucet. Hot water shall be between 90° and 120° Fahrenheit. Female bathhouses shall be provided with covered waste containers at each commode. Mirrors, if provided, shall be shatter-resistant.

(2)

If provided, restroom floors shall be easily cleanable and slip-resistant; carpeting is prohibited. Ventilation shall be adequate to prevent odors and condensation. Each hand basin shall be provided with single-use soap and towels; hot and cold water shall be provided to each basin through a mixing faucet. Hot water shall be between 90° and 120° Fahrenheit. Female restrooms shall be provided with covered waste containers at each commode. Mirrors, if provided, shall be shatter-resistant. All restrooms shall provide one diaper change table.

(d)

Water amusement structure.

(1)

A continuous clear deck of six feet minimum width shall be provided around the splash pad and shall be protected from surface run-off. The deck shall be constructed of slip resistant materials and provide no hazard to bare feet; there shall be no tripping hazards. The deck shall be sloped not less than one-quarter-inch per foot nor greater than three-eighths-inch per foot away from the spray pad to deck drains or to grade. All drains, ports, recessed receptacles, etc., shall be covered by an approved method. Wood, carpeting, and surfaces that retain water are prohibited.

(2)

If provided, deck drains shall drain to an approved wastewater disposal system. The drain system shall have a six-inch air gap between the drain discharge and the sanitary sewer. There shall be no connection between the deck drains and the re-circulation or spray systems. Deck drain covers shall have openings not exceeding one-half-inch in width. Drain covers shall be firmly affixed and shall not be able to be removed without the use of tools.

(3)

Electrical wiring not in conduit shall not pass within 20 feet horizontally of the amusement splash pad, deck, or feature devices. All electrical equipment shall meet all applicable state and local codes. All electrical outlets within 50 feet of the spray pad/deck shall be ground fault circuit interrupter (GFCI) protected.

(4)

All re-circulation equipment and facilities, chemical feeder areas, chemical storage, and related areas shall be secured from unauthorized access. Equipment rooms or areas shall be designed to prevent ground or surface water intrusion. Equipment rooms within buildings shall have approved floor drains and proper ventilation.

(5)

If provided, fencing shall be chain link or equivalent barrier with a minimum of 48 inches in height. Picket type fences shall have pickets spaced no greater than four inches apart. The fence bottom shall be no greater than four inches above grade; the top rail shall be no greater than 43 inches above grade. The fencing shall be designed to be difficult to climb.

(6)

Feature devices shall be constructed of durable, cleanable, inert, non-splintering materials and shall present no sharp or pointed aspects to patrons. Feature devices shall be designed so that limb entrapment does not occur. Spray devices protruding above pad level shall be easily visible and present no tripping hazard. Bucket devices shall be no higher than 12 feet or less than ten feet and contain a volume of less than two gallons. Discharge velocities from spraying devices shall not exceed twenty feet per second (= 20 fps). Device nozzle openings in the pad or nozzle openings on devices that are accessible to patrons shall not exceed one-half-inch in width. Fogging or misting devices that produce finely atomized water droplets shall be directly connected to a potable water source only. There shall be no submerged inlets or cross-connections for fogging or misting devices.

(7)

The spray pad shall be constructed of concrete or other approved material; the pad finish shall be slip resistant, easily cleanable, and present no sharp edges, tripping, cratering, or other hazards to bare feet. All parts of the pad shall be sloped, not less than one-quarter-inch per foot nor greater than three-eighths-inch per foot to drain(s). The design of the pad shall prevent water pooling. Pads with steps, risers, platforms or other changes in elevation shall be conspicuously identified in contrasting markings or coloration. The spray pad shall be of sufficient size so that the water from the feature devices impacts entirely on the spray pad under still air conditions.

(8)

All interactive water amusements that operate after dusk shall provide a minimum of five candle feet of illumination on the splash pad and surrounding deck. Overhead lighting shall not extend over the splash pad and deck areas. Lighting subject to water splash shall not exceed 15 volts; the exposed portion of the light shall be shatter-resistant and temperature shock resistant.

(9)

Sufficient hose bibs shall be provided to adequately flush the facility spray pad and deck with potable water.

(10)

Interactive water amusements constructed within buildings shall be designed with adequate ventilation to prevent mold, mildew, and condensation accumulation.

(e)

Re-circulation system/sanitizing/filtration. A re-circulation system shall be provide consisting of a pump, filter, chlorinator. The re-circulation system water, once filtered and chemically disinfected, shall be discharged to the collector tank at the point most distal from the feature pump suction supply. The re-circulation system shall be designed to operate 24 hours per day regardless of whether the feature system is operating. Combined systems are prohibited. All equipment shall be NSF approved and designed for swimming pool or similar use.

(1)

Re-circulation system pump(s) shall be designed to provide a 30-minute turnover rate at 50 feet of total dynamic head (50 ft. TDH) as indicated by the pump curve. Pumps shall be self-priming or located below the hydraulic gradient. A strainer shall be provided immediately before the suction port of all pumps; strainers shall not be required on vacuum filtration systems. Multiple speed pumps, split systems, and pump timers are prohibited. Multiple pumps shall be wired so that one cannot operate independently of the other.

(2)

All piping shall be NSF approved flexible or rigid Schedule 40 PVC or greater, or equivalent. Suction piping shall be sized so that the velocity does not exceed six feet per second (= 6 fps); pressure piping shall be sized so that the velocity does not exceed ten feet per second (= 10 fps). The piping shall be installed in a manner to allow complete draining.

(3)

Filters.

a.

A diatomaceous earth (D.E.) filter flow rate shall not exceed one and one half gallons per minute per square foot of filter surface area (= 1.5 gpm/ft ). Backwash wastewater shall discharge to a sanitary sewer or other approved disposal system through a six-inch or greater air gap.

b.

A high rate sand filter flow rate shall not exceed fifteen gallons per minute per square foot of filter surface area (= 15 gpm/ft ). A sight glass, pressure gauge(s), and air-bleeding device shall be provided. The backwash rate shall equal the filtration rate. Backwash wastewater shall discharge to a sanitary sewer or other approved disposal system through a six-inch or greater air gap.

c.

Rapid rate sand filters and cartridge filters are prohibited.

(4)

An automatic chlorinator shall be provided for the treatment of the re-circulation system water with chlorine (hypochlorous acid). The device shall meet NSF standards. The device shall be installed according to the manufacturer's directions and shall be capable of meeting the disinfecting standard for chlorine in subsection 38-7(f)(4). Elemental (gas) chlorine, cyanurate chlorine, polyhexamenthyl biquanide and polyhexamethyl biquanide systems are prohibited.

(5)

If provided, the heater shall have an automatic thermostat that will not allow the water to exceed 104° Fahrenheit. A heater bypass shall be provided with valves and piping sized the same as the return face piping between the filter and collector tank.

(6)

A flow meter that reads in gallons per minute shall be provided. The flow meter shall be installed per the manufacturer's instructions.

(7)

The collection system shall consist of spray pad drains, screens, collector tank, return pipe, and auto-fill system.

a.

Spray pad drains shall have a minimum of two interconnected gravity drains. All spray pad primary drain piping shall discharge to the collector tank through a screening mechanism. Secondary piping and valves shall be provided so that the spray pad wastewater may be diverted to a sanitary sewer or other approved disposal system through a six-inch air gap. Screened water shall discharge into the collector tank at the point most distal from the feature pump line. Drain piping shall be sized so that the water velocity does not exceed three feet per second (= 3 fps). Grate openings shall not exceed one-half-inch in width. Drain covers shall be firmly affixed and shall not be able to be removed without the use of tools. Direct suction drains are prohibited.

b.

A screen or similar device to intercept spray pad wastewater debris shall be provided before the collector tank. The screen shall be easily accessible for cleaning and servicing.

c.

A collector tank shall be provided to receive the gravity flow wastewater from the splash pad and treated water from the re-circulation system pump(s). The tank shall be watertight and constructed of inert, corrosion resistant materials. The tank shall be capable of withstanding all anticipated loading under both empty and full conditions. The tank shall be located to limit ground or surface water intrusion other than from the spray pad. The operating water storage volume of the collector tank shall be five times the feature device system pump(s) output at thirty feet of total dynamic head (30' TDH) as indicated by the pump curve; actual dynamic head loss calculations may be submitted in lieu of pump curve estimates. The minimum collector tank operating water storage volume shall not be less than 2,000 gallons. The collector tank shall be designed to be easily cleanable. An adequately sized waste drain shall be provided at the lowest point of the tank or a sump pump utilized. The waste drain piping shall discharge to a sanitary sewer or other approved waste disposal system through a six-inch air gap. The tank shall be constructed or set so as to provide a minimum one-quarter-inch per foot slope toward the waste drain port. An adequately sized overflow waste pipe shall be provided. The overflow pipe shall waste to a sanitary sewer or other approved waste disposal system through a six-inch air gap.

d.

An auto-fill device(s) to automatically control the water level in the collector tank shall be provided. The device(s) shall provide potable water through an approved two diameter (2X) air gap or through an approved reduced pressure zone (RPZ) device provided for that purpose only. The volume of water provided shall be sufficiently sized for all anticipated draw down conditions.

e.

Valves shall be provided to control water flow and to isolate major system components. Valves shall be sized to equal the diameter of the pipe specify for that location within the system.

(8)

There shall be no hydraulic connection between the feature system pump piping and the re-circulation system pump piping. The feature pump system shall be supplied with an automatic cut-off if the re-circulation system pump fails. The feature pump suction supply shall originate in the collector tank at the point most distal from the feature water return line.

(Ord. No. O-07-5-103, § 1, 6-25-07)