N.J. Admin. Code § 19:66-7.5

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

Section 19:66-7.5 - Drainage design standards

(a) General requirements for drainage are as follows:

1. Drainage plans shall be signed and sealed by a New Jersey-licensed professional engineer.

2. Stormwater management systems shall be designed in accordance with N.J.A.C. 7:7, Coastal Zone Management Rules, and 7:8, Stormwater Management.

3. When a land development activity is otherwise exempt from CAFRA review, non-point source impacts to water quality should be minimized to the fullest extent practicable, including, incorporating nonstructural measures, such as:

i. Protect areas that provide water quality benefits or areas particularly susceptible to erosion and sediment loss;

ii. Minimize impervious surfaces and break up or disconnect the flow of runoff over impervious surfaces;

iii. Maximize the protection of natural drainage features and vegetation;

iv. Minimize the decrease in the "time of concentration" (the time it takes for runoff to travel from the hydraulically most distant point of the drainage area to the point of interest within a watershed) from pre-construction to post-construction;

v. Minimize land disturbance including clearing and grading;

vi. Minimize soil compaction;

vii. Provide low-maintenance landscaping that encourages retention and planting of native vegetation and minimizes the use of lawns, fertilizers, and pesticides;

viii. Provide vegetated open-channel conveyance systems discharging into and through stable vegetated areas; and

ix. Provide other source controls to prevent or minimize the release of pollutants from the site into stormwater runoff, such controls include, but are not limited to:

(1) Site design features that help to prevent accumulation and discharge of trash and debris in drainage systems;

(2) Site design features that help to prevent and/or contain spills or other harmful accumulations of pollutants at industrial or commercial developments;

(3) When establishing vegetation after land disturbance, applying fertilizer in accordance with the requirements established under the Soil Erosion and Sediment Control Act, N.J.S.A. 4:24-39 et seq., and implementing rules;

(4) The use of plastic under landscaped or gravel areas are prohibited. All sub-gravel liners shall be made of filter cloth or other permeable material; and

(5) Any driveway shall be pitched to drain all runoff onto permeable areas of the site.

N.J. Admin. Code § 19:66-7.5

Adopted by 50 N.J.R. 217(a), effective 1/2/2018