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 1014 - EFFLUENT DISPOSAL AREAS: SOILS, SET-BACKS
Section Env-Wq 1014.02 - Poorly Drained Soils
Current through Register No. 13, March 27, 2025
Poorly drained soils shall be identified as hydric soils that have aquic conditions in the upper part and one or more of the following for any soil texture:
(a) Within 10 inches of the top of the mineral soil material and directly under an A or Ap horizon, a horizon with a depleted or gleyed matrix;
(b) Within 20 inches of the top of the mineral soil material and directly underlying a thick or very thick dark A or Ap horizon, a horizon with a depleted or gleyed matrix which is 4 inches or more in thickness;
(c) A matrix chroma of 2 or less that extends to a depth of 20 inches below the top of the mineral soil material, with a dark A or Ap horizon that is directly underlain by a horizon with a matrix value of less than 4, and, within 12 inches of the top of the mineral soil material or directly underlying the A or Ap horizon, whichever is shallower, 2% or more redoximorphic features that extend to the shallower of:
(d) A spodic horizon and, within 6 inches of the top of the mineral soil material, an E horizon with 2% or more redoximorphic features or a stripped matrix that is directly underlain by a spodic horizon with either of the following:
(e) A spodic horizon and a Bh or Bhs horizon greater than 2 inches thick which is:
(f) A spodic horizon and, within 10 inches of the top of the mineral soil material and directly underlying a dark A or Ap horizon, one of the following:
(g) If sandy and no spodic horizon, either of the following:
(h) No spodic horizon, and within 10 inches of the top of the mineral soil material and directly underlying a dark A or Ap horizon, a horizon with 5 % or more redox depletions and within 20 inches of the top of the mineral soil material a horizon with a depleted or gleyed matrix;
(i) No spodic horizon, and within 15 inches of the mineral soil material and directly underlying a greater than 10 inch, less than 15 inch, very dark Ap horizon, a horizon with 5% or more redox depletions and within 20 inches of the top of the mineral soil material a horizon with a depleted or gleyed matrix;
(j) A very dark A or Ap horizon less than 10 inches thick and directly underlain by a horizon with matrix color due to wetness of chroma 3 or less with 10% or more redoximorphic features, and:
(See Revision Note at chapter heading for Env-Wq 1000) #9086, eff 2-9-08