All grading work must be done in accordance with the provisions of this chapter, except that a permit, pursuant to the provisions of the chapter, shall not be required for the following work:
A. Excavation below finished grade for basements and footings of a building, retaining wall, swimming pool, or other structures authorized by a valid building permit. This shall not exempt any excavation having an unsupported height greater than five feet after the completion of such structure.
B. Excavation for cemetery graves.
C. Excavation when all of the following conditions are met:
1. The quantity is fifty cubic yards or less.
2. The depth is four feet or less.
3. The slope of the cut face is two feet horizontal to one foot vertical or less.
D. Fill when all of the following conditions are met:
1. The quantity is fifty cubic yards or less placed on ground sloping ten percent or less.
2. The height is four feet or less.
3. The slope of the fill embankment face is two feet horizontal to one foot vertical or less.
4. The existing drainage patterns are not altered.
E. Minor agricultural land leveling when the change in elevation is three feet or less.
F. Clearing vegetation when all of the following conditions are met:
1. The slope of the ground is ten percent or less;
2. The area to be cleared is one acre or less;
3. No land disturbance within one hundred feet of a watercourse or water body.
G. Grading in refuse disposal areas and sanitary landfills, and mining, quarrying, excavating, processing, and stockpiling of rock, sand, gravel, aggregate, or clay, as authorized by a use permit granted by the city, where the operation and conduct thereof is consistent with the grading standards set forth herein, and where the work does not block or divert any natural drainage way or increase runoff or sedimentation onto any adjacent or contiguous property. (Ord. 486 (part), 1986).