New Hampshire Code of Administrative Rules
Env - Department of Environmental Services
Subtitle Env-Wq - Water Quality and Quantity Programs
Chapter Env-Wq 1500 - ALTERATION OF TERRAIN
Part Env-Wq 1508 - PERMANENT METHODS FOR PROTECTING WATER QUALITY
Section Env-Wq 1508.16 - Pretreatment Practices: Deep Sump Catch Basins

Universal Citation: NH Admin Rules Env-Wq 1508.16

Current through Register No. 13, March 27, 2025

Deep sump catch basins shall comply with the following:

(a) The contributing area shall not exceed 0.25 acres of impervious area;

(b) The distance from the bottom of the outlet pipe to the bottom of the catch basin shall be at least 4 feet;

(c) The diameter of the catch basin shall be at least 4 feet; and

(d) A hooded outlet pipe shall be provided that extends at least one foot below the bottom of the outlet pipe.

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

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