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 1506 - METHODS FOR EROSION AND SEDIMENT CONTROL DURING TERRAIN ALTERATION ACTIVITIES
Section Env-Wq 1506.02 - Erosion Control Methods: Vegetation

(a) Stones and trash shall be removed from the area to be seeded so as not to interfere with the seeding;

(b) On slopes 4:1 or steeper, final preparation of the area to be seeded shall include creating grooves in the soil perpendicular to the direction of the slope to catch seed and reduce runoff;

(c) If needed to ensure growth, fertilizer or other organic soil amendments shall be applied during the growing season;

(d) Fertilizer applied to any area within 100 feet of any river, stream, pond, or lake shall be low phosphate, slow release nitrogen fertilizer only;

(e) Fertilizer applied to any area that is subject to RSA 483-B, the Comprehensive Water Quality Protection Act (Act), shall meet or be more protective of water quality than the minimum standards of the Act;

(f) Runoff shall be diverted from the seeded area;

(g) Subject to (h) below, seeding shall occur prior to September 15th of the year in which the area being seeded was disturbed;

(h) Areas seeded between May 15th to August 15th shall be covered with hay or straw mulch meeting the criteria of Env-Wq 1506.01(a) through (c); and

(i) If vegetated growth covering at least 85% of the disturbed area is not achieved prior to October 15th, one or more additional erosion control methods shall be implemented.