Section 3106B — California Building Code (Title 24, Part 2)

SPECIAL REQUIREMENTS FOR SPRAY GROUNDS

3106B Spray grounds. All applicable provisions of this chap- ter shall apply to a spray ground unless specifically addressed in this section.

3106B.1 All parts of the spray ground shall be designed and constructed so that there are no safety hazards.¶

constructed so that there are no safety hazards.

3106B.2 Walking surface.¶

A minimum 4-foot wide walking surface shall extend around the perimeter of the splash zone of a spray ground.

3106B.3 The recirculation system shall be in operation at all¶

times that the spray ground is open for use and shall have a minimum of four turnover cycles prior to opening for proper disinfection and filtration.

3106B.4 There shall be no standing water within the splash zone.¶

zone.

3106B.5 Nozzles that spray from the ground level shall be¶

flush with the ground with openings no greater than ¹ /2 inch.

PUBLIC POOLS

Spray ground water features that extend above the ground must be clearly visible.

3106B.6 The splash zone shall be sloped so that only water¶

from the spray ground water feature flows back to the surge basin. Areas adjacent to the splash zone shall be sloped away from the spray ground to deck drains or other surface water disposal systems.

3106B.7 All foggers and misters that produce finely atomized¶

mists shall be supplied directly from a potable water source and not from the surge basin.

3106B.8 When multiple pumps are used the control systems¶

for the spray ground water feature pump and recirculation system pump shall be electrically interconnected so that when the recirculation pump is off the spray ground water feature pump also is off.

3106B.9 The spray ground shall have a surge basin or treat-¶

ment tank constructed of materials which are inert, corrosion resistant, nontoxic and watertight including materials such as concrete, fiberglass, high density polyethylene, stainless steel or other materials as approved by the enforcing agent which can withstand all anticipated loadings under full and empty conditions as determined by an engineer or architect who has experience working on public pools.

3106B.10 The total volume of the surge basin shall be at least¶

4,000 gallons or a minimum of three times the gallons per minute flow rate of all the spray ground pumps and the recir- culation pump combined, whichever is higher.

3106B.11 The turnover time shall be one-half hour or less.¶

3106B.12 The suction intake for the spray ground or water¶

feature pump in the surge basin shall be located adjacent to the recirculation return line.

3106B.13 When separate pumps are used, the suction intake¶

for the recirculation pump shall be located in the lowest por- tion of the surge basin and on the opposite side from the suc- tion intake for the spray ground pump.

3106B.14 The surge basin shall be designed to have easy¶

access for cleaning and inspection. The basin shall have at least one ladder access and shall have at least one 3-foot by 3-foot access opening. Lids shall be locked or require a tool to open.

3106B.15 The surge basin shall be equipped with an auto-¶

matic make up water fill device through an air gap or be pro- tected by an approved backflow prevention device in accordance with Chapter 6 of the California Plumbing Code.

3106B.16 Ultraviolet light disinfection shall be used to sup-¶

plement disinfection methods required in this chapter unless another treatment process is provided that has been deter- mined by a nationally recognized testing laboratory to be capable of providing at least the equivalent level of reduction of cryptosporidium as the ultraviolet light disinfection system specified in this section. The ultraviolet light disinfection unit shall comply with the applicable requirements established by the NSF/ANSI 50-2010 performance standard effective August 2010.

3106B.17 An accurately calibrated ultraviolet light intensity¶

meter that has been properly filtered to restrict its sensitivity

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PUBLIC POOLS

to the disinfection spectrum shall be installed in the wall of the disinfection chamber at the point of greatest water depth from the light source.

3106B.18 The ultraviolet light unit shall be located on the¶

recirculation system and shall be installed to provide treated water directly to the spray features.

3106B.19 The ultraviolet light disinfection system must be¶

equipped with an automatic shutdown system that inactivates the water feature pump if the ultraviolet dosage rate drops below 40 mJ/cm ² .

3106B.20 Artificial lighting shall be provided at all spray¶

ground pads which are used at night or which do not have adequate natural lighting so that all portions of the spray pad and deck may be seen easily. Lighting that may be exposed to the feature pool water shall be installed in accordance with the manufacturer’s specifications and the California Electri- cal Code.

3106B.21 A means of diverting runoff from the splash zone¶

shall be installed on the spray ground drainage piping before the surge basin to divert water to the storm drainage system when the spray ground is not in operation.

3106B.22 A removable and cleanable catch screen or basket¶

shall be installed on the spray ground drainage system before it enters the reservoir to prevent larger debris from collecting in the surge basin.