Section Env-Wq 1508.13 - 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. Admin. Code § Env-Wq 1508.13
(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.Amended by Number 41, Filed October 12, 2023, Proposed by #13758, Effective 9/28/2023, Expires 9/28/2033 (formerly Env-Wq 1508.12) (see Revision Note #4 at chapter heading for Env-Wq 1500).