N.J. Admin. Code § 7:14A-7.15

Current through Register Vol. 56, No. 23, December 2, 2024

Section 7:14A-7.15 - Additional requirements for applications for NJPDES-DGW permits for disposal of dredged spoil

(a) In addition to the general requirements for discharge to ground water permits in 7:14A-7.9, an applicant for a NJPDES Discharge to Ground Water permit for land application of dredged spoil shall submit to the Department the information as required in this section.

(b) The applicant shall provide a proposed dredged spoil disposal plan containing the following components:

1. An engineering design and construction plan, including at a minimum;

i. A description of proposed pre-construction site work, grading, and foundation preparation;

ii. A description of characteristics of liners or other foundation materials;

iii. Results of stability analyses of dikes and berms with respect to operational stresses; and

iv. A description of the onsite and offsite transportation system, including transportation of dredged spoil to the site, routing, loading/unloading, and construction and maintenance of roads;

2. An operation/maintenance plan that includes:

i. A plan that details the filling sequence;

ii. A plan detailing staging, and interim storage of materials prior to disposal into the confined upland site;

iii. Provisions for dust control, and control of fugitive dust emissions; and

iv. Use of intermediate and final cover;

3. A Ground Water Protection Program demonstrating that the disposal of dredged spoil will not contravene the Ground Water Quality Standards of N.J.A.C. 7:9C. The Ground Water Protection Program shall identify and discuss the monitoring system to be employed pursuant to 7:14A-7.6(b) in consideration of the following:

i. With the exception of facilities which qualify for the monitoring style in 7:14A-7.6(d)1, the maximum leachate concentration of the dredged spoil shall be determined by subjecting an adequate number of samples to leaching tests. The determination of what constitutes an adequate number of samples shall be in accordance with a statistical method, as described in 7:14A-7.7 above. Leaching tests shall be performed according to the methods described by the U.S. Army Corps of Engineers, Waterways Experiment Station (WES), or other test approved by the Department.

ii. With the exception of facilities which qualify for the monitoring style in 7:14A-7.6(d)1, the leachate volume shall be estimated using the Hydrologic Evaluation of Landfill Performance (HELP) Model, EPA/600/9-94/xxx, U.S. Environmental Protection Agency Risk Reduction Engineering Laboratory, Cincinnati, OH.

iii. When the results of (b)3i and ii above indicate that the quality of the leachate shall exceed the ground water quality standards, the plan shall include a ground water flow and solute transport model that can demonstrate that the annual discharge of contaminants in the leachate will not result in contravention of the ground water quality standards; and

4. A closure/post closure care plan, that describes in detail:

i. The final cover to be used;

ii. A program to maintain the berms and dikes;

iii. Plans to maintain or control vegetation; and

iv. Plans to limit access using fences, and gates, etc.; and

v. A financial plan that describes in detail how the closure improvements shall be maintained for 30 years.

N.J. Admin. Code § 7:14A-7.15