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 1010 - SEPTIC TANKS
Section Env-Wq 1010.04 - Backfill and Bedding For Septic Tanks

Universal Citation: NH Admin Rules Env-Wq 1010.04

Current through Register No. 13, March 27, 2025

(a) Bedding material beneath a septic tank shall:

(1) Consist of at least 4 inches of sand or crushed stone placed on a firm and uniform base;

(2) Be level and compacted so as to prevent differential settling of the ground underneath the tank; and

(3) Not bear on boulders or rock edges or any aggregate in excess of 3 inches in size.

(b) Backfill around a septic tank shall be:

(1) Placed in lifts as specified by the tank manufacturer, but in no case greater than 12 inches; and

(2) Compacted in a manner that does not damage the structural integrity of the tank.

(See Revision Note at chapter heading for Env-Wq 1000) #9086, eff 2-9-08; ss by #9904-A, eff 4-16-11

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