Sec. 39-52. - General requirements.

(a)

All public swimming pools shall be equipped with a recirculation system consisting of pumps, hair and lint catcher, filters, disinfection equipment and necessary pipe connections to the inlets and outlets. Adequate provision shall be made for backwashing filters. The recirculation system shall be designed for at least a six-hour turnover of the swimming pool water.

(b)

A complete recirculation system shall be installed at public wading pools which cannot be served adequately by an adjacent swimming pool recirculation system. The recirculation system shall provide a pool volume turnover rate of once in three (3) hours or less.

(Ord. No. 4739-95)

Sec. 39-53. - Inlets.

The inlets for recirculation shall be submerged and be located to produce uniform circulation of water throughout any public swimming pool, without the existence of dead spots. Wall inlets shall be located on not more than twenty-foot centers entirely around the perimeter of the pool. Bottom inlets shall be spaced, depending on the pool dimensions, so as to produce uniform water circulation. Each inlet shall be designed as an adjustable orifice or provided with a valve.

(Ord. No. 4739-95)

Sec. 39-54. - Filtration system generally.

(a)

The recirculation system shall be equipped with a filtration system that will filter the entire content of a I [inlet] within six (6) hours or less at the rate of three (3) gallons or less per square foot of filter area for rapid sand filter and twenty (20) gallons or less per square foot of filter area for high-rate sand filters. Pressure filters shall be equipped with readily accessible air relief valves and with an access hole large enough to permit inspections, maintenance and repair work. Each pressure filter system shall be equipped with a pressure gauge, at least four (4) inches in diameter, on the inlet and outlet (unless the system is designed for one (1) gauge and is approved by the National Sanitarian Foundation or equivalent), to indicate the pressure in pounds per square inch; and a sight glass that can be easily removed for cleaning shall be provided on the waste discharge line. Gravity type filters shall be equipped with loss-of-head gauges.

(b)

The filtration rate for diatomaceous earth filters and similar equipment may not exceed one and one-half (1½) gallons per square foot of filter area with six (6) hours' turnover of pool volume, unless continuous slurry feed is provided, in which case the rate shall not exceed three (3) gallons per square foot of filter area.

(c)

Arrangements of equipment shall be provided for application of filter aid and proper precoating and cleaning of filter elements. All filters shall be so designed and capable of being cleaned or backwashed by use of the washwater pump and the manipulation of valves. In view of the constant change of design of such equipment, it will be necessary to evaluate each system individually and approval or rejection will be at the discretion of the health officer, based upon the need for protecting the health and safety of those using the pool.

(Ord. No. 4739-95)

Sec. 39-55. - Filter room.

(a)

Any room containing the filtration equipment, pumps and other recirculation system appurtenances for a public swimming pool shall be finished in a light color and be provided with a minimum twenty (20) foot candles of illumination and ventilation. The floor of the filter room shall be designed to provide for adequate drainage. Any facility for discharging filter backwashing water onto the filter room floor is strictly prohibited. Adequate provision shall be made for disposal of backwash water and collection and disposal of filter media. All the recirculation equipment in this room shall be installed so that it is easily convenient to operate and repair. All entrances below ground surface shall be by stairway. Adequate headroom shall be provided above all pressure filters. The filter room shall be maintained in a neat and orderly fashion and shall not be used for storage of potentially hazardous or toxic chemicals other than those necessary for the operation of the pool.

(b)

A placard shall be prominently displayed in the filter room provided for in this section, showing the following data: Size of pool in feet and volume in gallons; capacity of filters in square feet and gallons per minute; capacity of pumps in gallons per minute at the appropriate head in feet; head loss at which filters should be backwashed; and any other operating data the operator or health officer considers pertinent to the swimming pool.

(Ord. No. 4739-95)

Sec. 39-56. - Pumping equipment.

The pumping equipment of a public swimming pool shall have sufficient capacity to discharge the volume of water for the required turnover of the pool against the maximum head of the recirculation system. The pump used for backwashings and filters shall have sufficient capacity to backwash the unit at the rate of at least twelve (12) gallons per minute per square foot of filter area.

(Ord. No. 4739-95)

Sec. 39-57. - Hair and lint catcher.

The hair and lint catcher of a recirculation system required by this division shall be installed ahead of the filter pump and be designed and located so that it can be easily and simply dismantled for cleaning and inspection.

(Ord. No. 4739-95)

Sec. 39-58. - Rate of flow indicator.

The recirculation system required by this division shall be equipped with a rate of flow indicator reading in gallons per minute and so located so as to indicate the rate of flow of filtered water returned to the pool. The rate of flow indicator shall also be capable of indicating the rate of backwash in gallons per minute in sand or anthracite coal filters.

(Ord. No. 4739-95)

Sec. 39-59. - Suction cleaners.

(a)

A suction cleaner shall be provided for each public swimming pool. Where the suction cleaner is operated by the recirculating pump, a device shall be provided for throttling the flow from the pool outlet and the suction cleaner line shall be connected through the hair and lint catcher.

(b)

The suction cleaner required by this section shall be used at such times as are necessary to maintain the floor of the swimming pool free from all visible sediment.

(Ord. No. 4739-95)

Sec. 39-60. - Chemical feeding and testing equipment generally.

(a)

Means shall be provided for regulating the feeding of chemicals to the water in the recirculating system required by this division. The installation of mechanically operated, positive, chemical feeders or open type chemical machines is required. The installation of closed type solution pots is prohibited. Hand feeding of chlorine is strictly prohibited.

(b)

Each public swimming pool shall be provided with satisfactory equipment for determination of hydrogen-ion concentration ranging from 6.8 to 8.0. Satisfactory equipment shall be provided for determination of residual chlorine content ranging from 0.1 to 1.0 ppm. In swimming pools using isocyanurate chlorine compounds or similar types of chlorination, an approved test kit for checking the cyanuric acid content of the pool water must be provided. Such kit shall be capable of reading from 0.1 to 2.0 ppm. All isocyanurate chlorine compounds and equipment must be approved by the National Sanitation Foundation Testing Laboratory, Inc. The use of orthotolidine-type test kits is prohibited.

(Ord. No. 4739-95)

Sec. 39-61. - Disinfection equipment; chlorinator room.

(a)

All public swimming pools shall be provided with approved chlorine-feeding equipment. The chlorinating equipment shall be capable of applying a dose up to six (6) ppm of chlorine, at the rate of circulation. Chlorine gas-feeding equipment and chlorine gas cylinders shall be installed in an enclosed space or room separate from the filter room equipment and shall be equipped with a door capable of being locked. This chlorinator room shall be equipped with a forced draft fan exhausting to the outside from floor level and shall have a fresh air inlet vent located near the ceiling. The exhaust fan shall be capable of exhausting the contents of this room in three (3) minutes.

(b)

Unless topography makes it difficult or impossible, the chlorinator room shall be located above ground level and below deck level of the pool. The chlorine gas tanks shall be protected from direct sunlight and fastened in place during storage and use. A canister type gas mask for chlorine or a gas mask with a supply of oxygen under positive pressure or compressed air, either of which have been approved by the United States Bureau of Mines, shall be provided where chlorine gas is being utilized. The canister for the chlorine gas mask shall be replaced after each use or removal of the seal or, if not used, before the manufacturer's expiration date. The gas mask shall be accessible to, but outside of, the chlorinator room.

(Ord. No. 4739-95)

Sec. 39-62. - Chemical content of water.

(a)

The chlorine equipment shall be operated so as to maintain a free available chlorine content of not less than one (1.0) ppm nor more than three (3.0) ppm at all points throughout the public swimming pool water. In pools using isocyanurate chlorine compounds, the free available chlorine content of the pool shall be one (1.0) to three (3.0) ppm and the cyanuric acid content shall be forty (40) to sixty (60) ppm. Cyanuric acid content must never exceed one hundred (100) ppm at any time.

(b)

The hydrogen-ion concentration (pH) in a public swimming pool should be maintained on the alkaline side at a point between a pH of 7.2 and 7.8.

(c)

Chemicals other than chlorine, isocyanurate chlorine compounds, sodium or calcium hypochlorite, lime, soda, ash, aluminum sulfate and hydrochloric acid shall not be used to treat public swimming pool water, without permission from the health officer.

(Ord. No. 4739-95)

Sec. 39-63. - Operation of filters; clarity of water.

The filters for a public swimming pool shall be operated twenty-four (24) hours per day during the season the pool is in use. At all times when the pool is in use, the main drain(s) on the bottom of the pool shall be clearly visible from the deck around the pool.

(Ord. No. 4739-95)

Sec. 39-64. - Public spas and hot tubs.

There is hereby adopted by reference in the city the publication "Health and Safety Guidelines for Public Spas and Hot Tubs," dated April, 1981, as revised January, 1985, published by the United States Department of Health and Human Services, Public Health Service, Center for Disease Control, Atlanta, Georgia. Copies of this publication shall be available in the office of the city clerk.

(Ord. No. 4739-95)