A. There shall be filed with each urban lot split subdivision a grading plan showing graded building site elevations and grading proposed for the creation of building sites or for construction or installation of improvements to serve the subdivision. The grading plan, together with the original topography contours, may be shown on an exhibit to the urban lot split map. The grading plan shall indicate approximate earthwork volumes of proposed excavation and filling operations. In the event no grading is proposed, a statement to that effect shall be placed on the urban lot split map. In no event shall grading pursuant to an application submitted under this chapter exceed fifty (50) cubic yards. The grading plan shall comply with Section 25.16.01.