Grading and erosion control in Newport Beach

Newport Beach's code: Excavation for footings of a building, retaining wall or other structure under a valid building permit (not fill made from it, or an excavation left unsupported or unstable); excavation less than two feet deep, or not creating a cut slope greater than four feet in height and steeper than two horizontal to one vertical, and less than fifty (50) cubic yards on one site; fill not exceeding fifty (50) cubic yards on any one site, placed on natural undisturbed terrain flatter than five horizontal to one vertical or less than three feet deep and not intended to support structures (only when the work does not create an adverse erosion, drainage, groundwater or slope condition) (§ 15.10.030); A grading and erosion control plan is required. (Within the Newport Bay drainage catchment area, unless the Building Official waives it in writing.) (§ 15.10.060).