New Jersey Administrative Code
Title 7 - ENVIRONMENTAL PROTECTION
Chapter 14A - NEW JERSEY POLLUTANT DISCHARGE ELIMINATION SYSTEM
Subchapter 7 - REQUIREMENTS FOR DISCHARGES TO GROUNDWATER (DGW)
Section 7:14A-7.15 - Additional requirements for applications for NJPDES-DGW permits for disposal of dredged spoil
Universal Citation: NJ Admin Code 7:14A-7.15
Current through Register Vol. 56, No. 18, September 16, 2024
(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.
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