N.J. Admin. Code § 7:9A-5.6

Current through Register Vol. 56, No. 21, November 4, 2024

Section 7:9A-5.6 - Excessively coarse horizons and substrata

(a) Criteria for recognition of excessively coarse horizons or substrata are as follows:

1. Soil horizons or substrata which have a coarse fragment content greater than 50 percent by volume shall be considered excessively coarse regardless of their measured permeability or percolation rate.

2. Sand textured soil horizons or substrata containing no greater than 50 percent coarse fragments by volume, and no less than 15 percent coarse fragments by volume (20 percent coarse fragments by weight), shall be considered excessively coarse if they are composed primarily of coarse-very coarse sand (from 0.5 to two millimeters in diameter) and lack detectable amounts (two percent or more) of silt and clay. Soils which lack detectable amounts of silt and clay are soils which are dominantly gritty to the touch, lack cohesion when moist, lack stickiness when wet and do not stain the fingers when rubbed in the hand.

3. When doubt exists as to whether a horizon or substratum should be considered excessively coarse, the administrative authority may require a soil permeability or percolation test to be performed within the horizon or substratum in question. Soil horizons or substrata which are tested shall be considered excessively coarse when the measured permeability is faster than 20 inches per hour or the measured percolation rate is faster than three minutes per inch. Alternatively, soil texture may be verified by textural analysis as prescribed in 7:9A-6.3.

N.J. Admin. Code § 7:9A-5.6

Amended by R.2012 d.066, effective 4/2/2012.
See: 43 N.J.R. 478(a), 44 N.J.R. 1047(a).
In (a)1, substituted "coarse" for "course"; and in (a)2, substituted "containing no greater" for "which contain less", and inserted "coarse fragments", ", and no less than 15 percent", and "by volume (20 percent coarse fragments by weight),".