A school site shall be of sufficient size to accommodate safe access, parking, drainage, and security and shall have an adequate source of water and appropriate means of effluent disposal. Safe Access. A school site shall be configured for safe and controlled access that separates pedestrian traffic from vehicular traffic. If buses are used to transport students, then bus loading and unloading areas shall be separated from vehicular-traffic areas wherever possible. Dedicated student drop-off and pickup areas shall be provided for safe use by student passengers arriving or departing by automobile. Parking. A school site shall include a surfaced area that is capable of being maintained, stable, firm, slip resistant, and large enough to accommodate 1.5 parking spaces per full-time-equivalent employee and one student space per ten high school students. Alternative parking may be approved after the sufficiency of parking at the site is reviewed by the IAC based on the following criteria: Availability of street parking around the school; Availability of any nearby parking lots; Availability of public transit; Number of staff who drive to work on a daily basis; and Average number of visitors on a daily basis. Drainage. A school site shall be configured such that runoff does not undermine the structural integrity of the school buildings located on-site or create flooding, ponding, or erosion resulting in a threat to health, safety, or welfare. Security. All schools shall have safe and secure site fencing or other barriers with accommodations for safe passage through openings to protect students from the hazards of traffic, railroad tracks, animal nuisance, and steep slopes.