New Hampshire Code of Administrative Rules
Env - Department of Environmental Services
Subtitle Env-Ws - Division of Water
Chapter Env-Ws 300 - NEW HAMPSHIRE DRINKING WATER RULES
Part Env-Ws 372 - DESIGN STANDARDS FOR SMALL COMMUNITY WATER SYSTEMS
Section Env-Ws 372.24 - Appurtenances and Installation of Storage Tanks
Current through Register No. 13, March 27, 2025
(a) All small community water systems and those NTNC water systems important to public health as specified in Env-Ws 372.02(g) shall comply with this section.
(b) All water storage tanks shall have drains. All water storage tanks installed outdoors shall be totally backfilled to minimize damage to the tank coating, and any damage to the exterior coating during construction shall be repaired prior to tank backfill. Water storage tanks shall be located above the seasonal high ground water table to prevent possible flotation when empty. Proposals to bury the water storage tank into or below the water table shall not be acceptable.
(c) Atmospheric water storage tanks shall have a downward turned "U" vent with fine mesh screening to prevent the entry of small living things such as insects and small animals.
(d) To help ensure the integrity of water storage tanks, all buried steel water storage tanks shall:
(e) Atmospheric water storage tanks shall be equipped with a capped filler pipe, which shall be lockable if located on the exterior of the tank, to accommodate tank truck water delivery. Atmospheric water storage tanks existing as of January 1, 1996shall have filler pipes installed by January 1, 2007.
(f) All water storage tanks larger than 500 gallons and installed after January 1, 1996 shall have a name plate identifying the following:
(See Revision Note at chapter heading Env-Ws 300) #6521, eff 6-4-97; ss by #8360, INTERIM, eff 6-4-05, EXPIRES: 12-1-05; ss by #8496, eff 11-30-05
