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 1016 - CONSTRUCTION REQUIREMENTS FOR ALL EDA
Section Env-Wq 1016.04 - Type of Stone for Conventional Stone-and-Pipe Beds or Trenches
Current through Register No. 13, March 27, 2025
(a) The pipe, laid in a bed or trench of sufficient width and depth, shall be supported by approved septic stone as specified in (b), below.
(b) Approved septic stone shall be clean, uniformly-sized washed crushed stone, washed rock, or similar aggregate sized as specified in Table 1014-2, below.
(c) Approved septic stone shall be certified by its producer or distributer as meeting the sieve size and percent passing by weight requirements specified in Table 1014-2, below, based on testing done in accordance with test method T11 as published by AASHTO:
Table 1016-2: Approved Septic Stone Requirements
Sieve Size |
Percent Passing By Weight |
2 inches |
100 |
1.5 inches |
90 - 100 |
3/4 inch |
0 - 20 |
#4 |
0 - 5 |
#200 |
0 - 2 |
(See Revision Note at chapter heading for Env-Wq 1000) #9086, eff 2-9-08