N.J. Admin. Code § 7:14A-9.12

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

Section 7:14A-9.12 - Application requirements for NJPDES-DGW permits for sanitary landfills

(a) In addition to the information required pursuant to 7:14A-4.3, an applicant for a NJPDES-DGW sanitary landfill monitoring permit shall ensure that the Department has in its possession maps, cross sections and reports as follows. Maps may be combined if all required features are clearly shown.

1. A location map:

i. The site shall be located on a U.S. Geological Survey 7.5 minute series Topographic Quadrangle. The quadrangle shall be the most recent revision.

ii. The site shall be shown by legal boundaries surveyed by a New Jersey licensed land surveyor indicating roadways, adjacent property ownerships and all inhabited structures and facilities within one half mile of site boundaries.

2. A topographic map(s):

i. The topographic map of the facility shall have a horizontal scale of at least one inch equals 200 feet and a contour interval of five feet. Contour elevations shall be based on established N.J. Geological Control Survey Datum and the map shall be keyed into the New Jersey State plane coordinate systems. The topographic map(s) shall indicate original, existing, and proposed topography.

ii. An additional topographic map shall indicate all surface waters within one-half mile of the sanitary landfill site and all water supply reservoirs and public recreational bodies of water within one mile of the landfill boundary;

3. A ground water supply map showing the depth and location of wells within one-half mile radius and all public supply wells or wells permitted to pump over 100,000 gallons per day or 70 gallons per minute within 1 1/2 miles of the proposed sanitary landfill shall be plotted. Pump capacity or diversion allocation for all wells yielding greater than 70 gallons per minute shall be reported and keyed to the map. All occupied buildings, including private dwellings, within one-half mile radius of the proposed sanitary landfill facility shall be plotted and identified as to type (for example, industrial, commercial, or residential). The service areas, if any, of municipal or community water supply systems shall be identified;

4. A detailed geologic map of the entire site, including all the area outside the sanitary landfill site boundary to a distance of one-half mile. The base data for this map shall be compiled by a geologist. The scale of the geologic map shall be at least one inch equals 400 feet and shall show the following information:

i. Bedrock outcrops;

ii. The dip and strike of sedimentary formations and foliation trends and dip angles of igneous and metamorphic rocks;

iii. Fault(s) and prominent shear zone(s) trends;

iv. Joint or fracture trends in bedrock outcrops including dip angles;

v. The trend direction of solution channels in carbonate rocks and sink holes;

vi. The location of any active or abandoned mine workings; and

vii. A geologic report describing the major characteristics of the formation(s), including thickness, lithology, structural features, degree of weathering, and amount of overburden;

5. Geologic cross-section(s) and fence diagrams, preferably in three dimensions, showing the spatial relationship of the sanitary landfill, the geology, the monitoring wells, any other engineered site improvements, or other significant features that influence the interpretation of analytical results and explanations;

6. Soils map and borings:

i. A soils map shall be submitted with a scale of at least one inch equals 400 feet. Soils information should be drawn from the U.S.D.A. Soil Conservation Service Report(s) with site specific soils data determined by a soil scientist using the U.S.D.A. textural classification system on data obtained from the required borings and other available data.

ii. A sufficient number of borings necessary to determine soil characteristics, depth to bedrock (where applicable), permeability and ground water elevations shall be drilled. Where, in the judgment of the Department, submitted information is insufficient to adequately evaluate the site, additional and/or deeper borings, supplemented by excavations, test pits or geophysical methods will be required.

(1) Subsurface data obtained by borings shall be collected by split spoon drive method, shelby tube or diamond bit coring. Auger borings are not acceptable.

(2) All borings shall be a minimum depth of 10 feet below the seasonally high water table. In no case shall borings be less than 20 feet below the lowest elevation by the sanitary landfill.

(3) Split spoon, shelby tube and diamond bit core samples shall be labeled and properly stored for a minimum period of one year from the date of the permit application.

(4) Profiles shall be shown for each boring giving the depths and texture of each soil stratum or horizon and the elevation of any ground water or aquifer encountered, and shall include the date each boring was taken;

7. A hydrogeologic report shall be provided for the site and for a one-half mile radius of the proposed site. The hydrogeologic report shall include:

i. A piezometric map based upon stabilized ground water elevations below the site showing direction(s) and rate(s) of ground water flow and an indication as to whether the ground water is unconfined, confined (artesian) or both for the proposed sanitary landfill;

ii. A generalized piezometric map based upon available data including, but not limited to, existing topography, surface drainage and existing well data, shall be provided for the area within one-half mile radius of the site boundary;

iii. A survey of wells identified on the ground water supply map prepared pursuant to (b)3 above including the use, approximate yield, and depth of each well; and

iv. All public water supplies and wells capable of pumping over 70 gallons per minute or 100,000 gallons per day within a 1 1/2 mile radius of the sanitary landfill, including an assessment of the potential impact on those supplies by the sanitary landfill;

8. Maps showing the location of all existing and proposed ground water monitor wells; and

9. Results of leachate generation calculations provided by performing a water balance calculation such as the Hydrologic Evaluation of Landfill Performance (HELP) Model, EPA/600/9-94/xxx, U.S. Environmental Protection Agency Risk Reduction Engineering Laboratory, Cincinnati, OH.

N.J. Admin. Code § 7:14A-9.12