Stone berm level spreaders shall comply with the following:

1. (a) The level spreader shall discharge to a vegetated receiving area with the capacity to convey the discharge without erosion;

2. (b) The receiving area shall:

   1. (1) Have a slope of less than 15%; and
   2. (2) Be stable prior to construction of the level spreader;

3. (c) The level spreader shall:

   1. (1) Be a 6-inch deep trapezoidal trough; and
   2. (2) Have a minimum bottom width of 3 feet;
4. (d) The level spreader base and top of berm shall be at 0% grade;
5. (e) The level spreader side slopes and berm side slopes shall be 2:1 or flatter;

6. (f) The berm shall:

   1. (1) Be at least 18 inches high; and
   2. (2) Have a top width of at least 2 feet; and

7. (g) The stone used in the berm shall be graded within the following limits:

   1. (1) 100% by weight shall pass the 12-inch sieve;
   2. (2) From 84% to 100% by weight shall pass the 6-inch sieve;
   3. (3) From 68% to 83% by weight shall pass the 3-inch sieve;
   4. (4) From 42% to 55% by weight shall pass the 1-inch sieve; and
   5. (5) From 8% to 12% by weight shall pass the number 4 sieve;

Source. #9343, eff 1-1-09; amd by #9817-A, eff 12-1-10; ss by #12342 (formerly Env-Wq 1508.17); ss by #13758, eff 9-28-23 (formerly Env-Wq 1508.18); ss by #14472, eff 1-19-26, EXPIRES: 1-19-36