Section Env-Wq 1508.17 - Groundwater Recharge Practices The following methods shall be acceptable methods for infiltrating groundwater, provided that all method-specific criteria are met:
(a) Infiltration practices in accordance with Env-Wq 1508.07;(b) Filtering practices in accordance with Env-Wq 1508.08 that infiltrate into the native soil below the practice; and(c) Other groundwater recharge practices, including but not limited to permeable surfaces, modular concrete paving blocks, modular concrete or plastic lattice, cast-in-place concrete grids, soil enhancement technologies, and other materials such as gravel, cobbles, wood, mulch, brick, or natural stone, provided that the following criteria are met: (1) The practice shall completely drain within 72 hours;(2) Bedrock and the SHWT shall be at least one foot below the base of the practice; and (3) Prior to adding a factor of safety, the underlying soil has a design infiltration rate of 0.5 inches per hour or more, as calculated per Env-Wq 1504.14.N.H. Admin. Code § Env-Wq 1508.17
(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 1508.16) (see Revision Note #4 at chapter heading for Env-Wq 1500).