N.H. Admin. Code § Env-Wq 1506.05

Current through Register No. 44, October 31, 2024
Section Env-Wq 1506.05 - Sediment Control Methods: Erosion Control Mix (ECM); ECM Berms
(a) Erosion control mix berms shall be:
(1) Used only in areas where erosion will occur in the form of sheet erosion only and there is no concentration of water in a channel or other drainage way above the berm;
(2) Installed following the contour of the land as closely as possible;
(3) Used only if the area upslope of the berm has a slope of less than 5%; and
(4) At least 12 inches high and at least 2 feet wide.
(b) Erosion control mix shall:
(1) Have an organic portion between 25% and 65%, dry weight basis that is:
a. Fibrous and elongated such as from shredded bark, stump grindings, composted bark, or equivalent manufactured products; and
b. Not comprised of wood chips, bark chips, ground construction debris, or reprocessed wood products;
(2) Not contain silts, clays, or fine sands;
(3) Have a particle size by weight of 100% passing a 3-inch screen, 90% to 100% passing a 1-inch screen, 70% to 100% passing a 0.75-inch screen, and 30% to 75% passing a 0.25-inch screen; and
(4) Have a pH between 5.0 and 8.0.

N.H. Admin. Code § Env-Wq 1506.05

(See Revision Note #1 at chapter heading for Env-Wq 1500) #9343, eff 1-1-09

Amended by Volume XXXVII Number 32, Filed August 10, 2017, Proposed by #12342, Effective 8/15/2017, Expires 8/15/2027.