New Hampshire Code of Administrative Rules
Env - Department of Environmental Services
Subtitle Env-Wq - Water Quality and Quantity Programs
Chapter Env-Wq 1000 - SUBDIVISIONS; INDIVIDUAL SEWAGE DISPOSAL SYSTEMS
Part Env-Wq 1018 - BEDS AND TRENCHES
Section Env-Wq 1018.01 - Construction of Beds
Universal Citation: NH Admin Rules Env-Wq 1018.01
Current through Register No. 13, March 27, 2025
(a) Concrete chamber beds shall be as specified in Env-Wq 1017.02(a).
(b) For a conventional stone-and-pipe system, the following shall apply:
(1) The bed shall consist of a minimum of 12
inches of stone total, with a minimum of 6 inches of stone under the pipes and
a minimum of 2 inches of stone over the pipes; and
(2) The pipes shall be laid evenly spaced a
maximum of 5 feet on center with 2.5 feet of septic stone from the pipes to the
outside of the bed.
(c) The bed for a chamber or LDGP system shall be as specified in the most recent manufacturer's design manual approved by the department.
(See Revision Note at chapter heading for Env-Wq 1000) #9086, eff 2-9-08
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