If project grading requires the removal or importation of more than 10,000 cubic yards of dirt, soil, sand, gravel, rock, clay, decomposed granite or other similar material from or to a lot, and if more than 20 occupied dwelling units in single-family dwellings, multiple-family dwellings or mobile homes, or any combination thereof, or a hospital or accredited public school by the Education Code of the State of California is located within a parallel corridor 300 feet wide on each side of and measured from the edge of the existing right-of-way of the streets forming the proposed transport route, and within a distance equal to the extent of such route, or, within a distance of 2,640 feet, whichever is less, measured from the proposed point of access to such project, then a person shall not engage in project grading in any zone unless such a person either:
A.
Obtains a Conditional Use Permit; or
B.
Submits a plot plan to the Director, who shall approve the plan upon finding that the proposed project grading will comply with the requirements of this Division. The plan approval shall be valid for the time stated by the Director. If no time is stated, such approval shall be good for one (1) year. If the Director finds that there is good cause shown, and that the applicant, in moving material pursuant to such approval, has not violated this or any other ordinance or statute, he may extend the duration of such approval for not more than one (1) year if the applicant files a request for such extension prior to the expiration date of his original approval. Only one (1) extension may be granted.
If more than one hundred thousand (100,000) cubic yards of material are to be moved, and the project is not in conjunction with construction, maintenance or repair by a governmental agency, such person shall obtain a Conditional Use Permit.