1. (a) The finished grade over the bed shall:

   1. (1) Extend for a minimum of 3 feet horizontally beyond the bed before starting to slope; and
   2. (2) Be covered by 4 to 6 inches of loam suitable for seeding, or other stable surface material.
2. (b) The sides of a raised EDA shall taper at a 3:1 slope, except that a slope of 2:1 may be used if necessary to maintain the side slopes on-lot or to avoid an existing permanent structure or other features such as trees.

3. (c) Side slopes shall be stabilized by being covered with:

   1. (1) At least 3 inches of loam that is seeded immediately;
   2. (2) At least 3 inches of bark mulch; or
   3. (3) Other material that will prevent erosion and lead to long-term stability of the slopes without interfering with ventilation, such as an erosion control blanket.

Source. (See Revision Notes #1 and #2 at chapter heading for Env-Wq 1000) #11184, eff 10-1-16; ss by #14486, eff 2-1-26, EXPIRES: 2-1-36