N.H. Code Admin. R. Env-Wq 1508.12

Current through Register No. 25, June 20, 2024

Section Env-Wq 1508.12 - Pretreatment Practices: Vegetated Filter Strips

Vegetated filter strips shall comply with the following:

(a) The vegetative cover type of the filter strip shall be forest, meadow, or a combination of forest and meadow;

(b) The overland flow length to the filter strip shall not exceed 75 feet for impervious surfaces and 150 feet for pervious surfaces;

(c) Longitudinal slopes shall be no less than 0.5 percent and no greater than 15 percent; and

(d) The vegetated filter strip shall be at least 25 feet long and as wide as the area draining to the strip.

N.H. Code Admin. R. Env-Wq 1508.12

(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.