Each swimming pool shall be provided with an approved first-aid kit which fulfills the minimum requirements of the American Red Cross and the following additional safety equipment: A rescue tube for lifesaving for each lifeguard on duty; A reaching pole of adequate length as determined by pool size; A backboard designed for medical emergency use that is equipped with straps and a head immobilizer; A cot with blankets; A whistle (one per guard); and A dust pan and brush for glass removal. Each swimming pool shall be provided with a telephone within the pool enclosure with all emergency numbers listed. All swimming pools using gas chlorine for disinfecting pool water shall have available a gas mask currently approved by the National Institute of Occupational Safety and Health (NIOSH). This mask must not be stored in the gas chlorine room. All chemicals kept on the pool premises shall be stored in a safe manner. No glass containers shall be allowed within the pool enclosure. No situation considered by the County Health Officer to be a safety hazard shall be permitted to exist at any swimming pool.