|(a) A scrap tire storage site shall be designed so that the health, welfare and safety of operators, transporters, and others who may utilize the site are maintained. (b) A registered scrap tire storage site may store scrap tires or tire pieces using outdoor or indoor tire piles or enclosed and lockable containers, or a combination of any of the aforementioned methods. Registered scrap tire storage sites shall be limited to a maximum of three piles of whole used or scrap tires on the ground. (1) Tire piles consisting of scrap tires or tire pieces shall be no greater than 15 feet in height, nor shall the pile cover an area greater than 8,000 square feet. Existing storage sites with variances to the 8,000 square foot pile size limit may maintain the approved pile size if approved in writing by the local fire marshal in the fire plan under the current registration. Approval from the executive director and the local fire marshal will be required to maintain existing pile sizes greater than 8,000 square feet with renewal or amended application requests. (2) Scrap tires or tire pieces may be stored in any enclosed building or other type of covered enclosure. Where applicable, local fire prevention codes must be met and appropriate precautions taken. Indoor storage piles or bins shall not exceed 12,000 cubic feet with a 10-foot aisle space between piles or bins. (3) Scrap tires or tire pieces may be stored in trailers provided the trailer is totally enclosed and lockable. (c) There shall be a minimum separation of 40 feet between outdoor piles consisting of scrap tires or tire pieces. This 40-foot space shall be designated as a fire lane that totally encircles the tire piles and shall be an all-weather road. Provisions shall be made for all-weather access from publicly- owned roadways to the scrap tire storage site, and from the entrance of the site to unloading and storage areas used during wet weather. The design (a cross-section), location, maintenance, and all- weather serviceability of interior access roads/fire lanes shall be addressed in the overall facility design and in the Site Operating Plan, and shall be indicated on the Site Layout Plan with appropriate design notes. At a minimum, these roadways shall have minimum 25-foot turning radii, shall be capable of accommodating firefighting vehicles during wet weather, and shall meet applicable local requirements and specifications. An estimate shall be provided of the number, size, and maximum weight of vehicles expected to use the site daily. The open space between buildings and outdoor tire piles consisting of scrap tires or tire pieces shall be a minimum of 40 feet; kept open at all times and maintained free of rubbish, equipment, tires, or other materials. In the event that a variance for supersize piles is approved by the executive director, the minimum fire lane separation shall be at least 40 feet. Upon coordination with the local fire marshal, the distance may be increased, as necessary, to protect human health and safety. Storage sites registered before January 1, 1998 may maintain setbacks less than 40 feet under the current registration if approved in writing by the local fire marshal in the fire plan. (d) Outdoor piles consisting of scrap tires or tire pieces and entire buildings used to store scrap tires or tire pieces shall not be within 40 feet of the property line or easements of the scrap tire storage site. This setback line shall be kept open at all times and maintained free of rubbish, equipment, tires, or other materials. The executive director may grant a variance to the 40-foot property line or easement if the setback line meets the other applicable requirements of this subchapter and the applicant provides a written statement to the executive director from the local fire marshal that the distance that is the subject of the variance is adequate for fire fighting purposes. In the event that a variance for supersize piles is approved by the executive director, the minimum setback from property lines or easements will be 40 feet. Storage sites registered before January 1, 1998 may maintain setbacks less than 40 feet under the current registration if approved in writing by the local fire marshal in the fire plan. (e) Scrap tires shall be split, quartered, or shredded within 90 days from the date of delivery to the scrap tire storage site. The executive director may grant a variance from this requirement if the executive director finds that circumstances warrant the exception. Off-the-road tires that are used on heavy machinery, including earthmovers, loader/dozers, graders, agricultural machinery and mining equipment are exempt from this requirement. Truck tires shall not be classified as off-the-road tires and thus are not exempt from this requirement. Appropriate vector controls shall be used at a frequency based upon type and size of piles, weather conditions and other applicable local ordinances. (f) Access to the facility shall be controlled to prevent unauthorized activities. The facility shall be completely fenced with a gate that is locked when the facility is closed. A scrap tire storage site shall be enclosed by a chain-link type security fence at least six feet in height. (g) The scrap tire storage site shall have an adequate fire protection system using fire hydrants or a firewater storage pond or tank at the facility. The capacity of a firewater storage pond or tank shall be of sufficient size for firefighting purposes and shall be in conformance with all local and state fire code requirements. (h) The scrap tire storage site shall have large capacity dry chemical fire extinguishers located in strategically-placed enclosures throughout the entire site, equally spaced within the facility to provide quick access from any location within the facility. The minimum number of fire extinguishers or fire hydrants for each scrap tire storage site shall be one per acre. (i) If necessary, suitable drainage structures or features shall be provided to divert the flow of rainfall runoff or other uncontaminated surface water within the scrap tire storage site to a location off-site. (j) Each site shall conspicuously display at the entrance a sign at least 1 1/2 feet by 2 1/2 feet in size with clear, legible letters stating the name of the scrap tire storage site using the words "scrap tire site," the commission registration number, and operating hours. (k) A scrap tire storage site located within a designated 100-year floodplain area shall be designed with adequate environmental protection. The owner/operator shall demonstrate that the tire storage area will not restrict the flow of the 100-year flood, reduce temporary water storage capacity of the floodplain, or result in a washout of tires, tire pieces or other material so as to pose a hazard to human health and the environment. (l) The scrap tire storage site shall be designed in accordance with all local building codes, fire codes, and other applicable local codes.