This ordinance attempts to minimize the ecological disturbances resulting from development of land. In particular, this ordinance sets up guidelines and requirements for the use of such erosion/sedimentation control structures as stormwater screenings and silt fences. The ordinance requires that developers obtain a grading permit before beginning work on a site, and that they draw up grading and drainage plans certified by engineers, detailing how erosion will be controlled and how trees will be protected.