Connection of swimming pools, spas, hot tubs, and their associated equipment, whether public or private, to sanitary sewers shall not be permitted unless, and until, a permit from the District is obtained therefor. A permit giving permission for connection of the pool or equipment shall require that they be separated from the sewer by an air gap and a sump. The maximum size discharge out of the sump is to be four-inch I.D. pipe. The discharge water from pool draining activities must have a pH between 6.0 and 9.0 and a record of the pH must be kept to certify that the discharge is complying with the discharge limits of the District. (Ord. 85 §2, 1995; Ord. 72 §1, 1991; Ord. 64 §2; Ord. 37 §2, 1983; Ord. 3 §5.3, 1973)