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In addition to general building ventilation and heat requirements applicable to a shooting range facility, the shooting range shall be provided with an engineered ventilation and exhaust system that complies with OSHA Lead Standard for General Industry, 29 C.F.R. 1910.1025 and that prevents the build-up of noxious gases caused by the discharge of firearms. The shooting range ventilation and exhaust system shall conform to the following requirements:
(a) The ventilation air supply system shall provide a horizontal laminar air flow from floor to ceiling at the firing line of 75 fpm. The minimum allowable range laminar air flow shall be 50 fpm. from the firing line to the bullet trap. The laminar flow of air shall be directed away from shooters at the firing line downrange towards the backstop/bullet trap area.
(b) The entire shooting range shall be maintained at a slightly negative pressure with respect to adjacent areas to prevent the escape of contaminants from the shooting range. Exhaust air shall exceed supplied air by a minimum of 10%.
(c) The shooting range shall be designed and constructed with separation walls, doors, windows and assemblies with related gaskets and sealing materials sufficient to close off the shooting range from the shooting range facility and adjacent spaces to provide the air pressures required for the shooting range ventilation and exhaust system to operate correctly.
(d) Where a shooting range facility contains multiple shooting ranges, each shooting range shall be provided with a separate ventilation and exhaust system.
(e) The supply and exhaust systems shall be electrically interlocked to turn on each system at the same time.
(f) The shooting range ventilation and exhaust system shall be a totally separate system isolated from any other ventilation and exhaust system which serves the ancillary spaces of the shooting range facility or building.
(g) The ventilation and exhaust system shall be commissioned prior to initial operation and a regular schedule of maintenance and system adjustment shall be included in the description of the ventilation and exhaust system as part of the permit application. For purposes of this subsection (g), “commissioned” has the same meaning ascribed to that term in American Society of Heating, Refrigeration, and Air-conditioning Engineers Guideline 0-2005. The shooting range ventilation and exhaust system shall be operated and maintained in conformance with the submitted schedules and procedures.
(h) The shooting range ventilation and exhaust systems shall be either:
(1) a 100% total exhaust/purge system utilizing 100% fresh make up air. All air from the shooting range shall be completely exhausted. The exhausted air shall be filtered and cleaned to remove lead particulate before exhausting to the open atmosphere. Twenty-five percent of the airflow shall be exhausted 15 feet downrange from the firing line and the other 75% shall be exhausted at the apex of the backstop/bullet trap. The ventilation system shall operate at one fan speed only and shall be designed and provided with automatic sensors and controls, where required, to monitor and ensure the performance and safety of the system; or
(2) an air cleaning re-circulation system that re-circulates up to a maximum of 75% of the air and cleans and exhausts a minium of 25% of the air in the shooting range. The air re-circulation system shall be designed and provided with primary and secondary filters, high efficiency particulate air (HEPA) filters, electronic precipitators or other air filtering and cleaning technology, as reviewed and approved by the commissioner pursuant to subsection 13-96-1210(k), to remove lead particulate from the re-circulated air before re-introduction into the shooting range. System exhaust fans may operate at variable speeds. The ventilation system shall be designed and provided with automatic sensors and controls, where required, to monitor and ensure the performance and safety of the system.
(i) New technology or designs for shooting range ventilation and exhaust systems not authorized in this code shall be reviewed and approved by the committee on standards and tests prior to installation.
(j) All other ventilation, refrigeration and heating systems for the shooting range facility shall conform to the requirements of Chapter 18-28.
(k) The shooting range shall be provided with heating and cooling for the comfort of shooting range patrons and staff. Where the heating or cooling system is not a component of the ventilation and exhaust system, such as radiant heating or geothermal sourcing, one heating or cooling system in the shooting range facility is permitted.
(l) All ventilation and exhaust equipment, ducts and appurtenances shall be located and installed to allow ready maintenance and inspection.
(Added Coun. J. 7-6-11, p. 3073, § 8; Amend Coun. J. 9-8-11, p. 7262, § 4)
(a) Every shooting range facility shall meet all applicable plumbing code requirements of Chapter 18-29.
The occupancy calculation to determine the required number of plumbing fixtures for the shooting range facility shall be as provided in Chapter 13-56.
(b) The discharge of any waste from the shooting range shall be in compliance with all applicable local, state or federal laws or standards, and shall comply with the requirements of Articles 7, 8 and 11 of Chapter 18-29 to prevent the discharge of any prohibited waste from entering into any sewer, watercourse, natural outlet or waters.
(c) Interceptors or separators shall be installed to recover solids from metal particles, metal chips, shavings, plaster, stone, clay, sand, cinder, ashes, glass, gravel, oily or greasy residual waste and similar materials in separating lighter than water waste from heavier than water waste or waste from soiled water to prevent such matter from entering the drain line. The size, type, location and construction material of each interceptor and of each separator shall be designed and installed in accordance with the manufacturer's instruction, the rules and regulations promulgated by the departments of water management and health, and the requirements of Section 18-29-1003 based on the anticipated conditions of use. All interceptors and all separators shall be installed in an accessible location to permit the convenient removal of the lid and internal contents and to permit service and maintenance. Unless otherwise approved, all interceptors and separators shall have an inspection manhole located outside on private property to permit observation, measurement and sampling downstream of the interceptors or separators.
(d) Waste that does not require treatment or separation need not be discharged into any interceptor or separator and may be in a separate line until after the interceptor or separator but must connect to the building sewer before the public way. Waste from the shooting range facility which does not have a lead contamination level of more than 0.5 mg/L is not required to discharge into an interceptor or separator.
(e) Grease traps approved by the department of buildings shall have the waste retention capacity indicated in Table 18-29-1003.3.6 for the flow-through rated indicated.
(Added Coun. J. 7-6-11, p. 3073, § 8; Amend Coun. J. 11-16-11, p. 13798, Art. II, § 6; Amend Coun. J. 6-25-14, p. 83727, § 9)
(a) Every shooting range facility shall be constructed with a system II (battery pack) emergency lighting in conformance with the requirements of Section 14E-7-700.
(b) The shooting range shall be constructed to be free of excessive glare and major differences in light levels. Floors and ceilings shall be designed to provide light reflection.
(c) The lighting design and construction of every shooting range shall include the following:
(1) General lighting shall provide uniform light levels over the entire range area and adjoining areas;
(2) Local lighting shall supplement general lighting along the firing line to provide better visibility;
(3) Semi-direct lighting shall be provided to direct 60 to 90 percent of the lighting on the target.
(Added Coun. J. 7-6-11, p. 3073, § 8; Amend Coun. J. 9-6-17, p. 55278, Art. II, § 36)
The commissioner is authorized to promulgate rules and regulations for the administration and enforcement of this Article, including rules and regulations pertaining to the construction and permit requirements of shooting ranges and shooting range facilities.
(Added Coun. J. 7-6-11, p. 3073, § 8)