15A NCAC 02T .1604 APPLICATION SUBMITTAL
(a) Site Description and Incident Information shall be provided by the applicant to the Division including the following:
(1) The applicant shall identify the site by name, address, permit number, and incident number assigned by the oversight agency, if applicable.
(2) The applicant shall briefly describe the site, noting pertinent site information including:
(A) contaminants of concern;
(B) sources and dates of the contaminant release;
(C) remedial actions to date;
(D) current land use; and
(E) potential receptors.
(b) Soils Evaluation. For systems with proposed discharge within seven feet of land surface and above the seasonal high water table, a soil evaluation of the disposal site shall be provided to the Division by the applicant. If required by G.S. 89F, a soil scientist shall submit this evaluation. This evaluation shall be presented in a report that includes the following components:
(1) Field description of soil profile. Based on examinations of excavation pits or auger borings, the following parameters shall be described by individual diagnostic horizons to a depth of seven feet below land surface or to bedrock:
(A) thickness of the horizon;
(C) color and other diagnostic features;
(E) internal drainage;
(F) depth, thickness, and type of restrictive horizons;
(H) cation exchange capacity; and
(I) presence or absence and depth of evidence of any seasonal high water table.
Applicants shall dig pits if necessary to evaluate of the soils at the site.
(2) Recommendations concerning annual and instantaneous loading rates of liquids, solids, other wastewater constituents, and amendments. Annual hydraulic loading rates shall be based on in-situ measurement of saturated hydraulic conductivity in the most restrictive horizon.
[Note: The North Carolina Board for Licensing of Soil Scientists has determined, via letter dated December 1, 2005, that preparation of soils reports pursuant to this Paragraph constitutes practicing soil science under G.S. 89F.]
(c) Hydrogeologic Evaluation. A hydrogeologic evaluation prepared by a Licensed Geologist, License Soil Scientist, or Professional Engineer if required by Chapters 89E, 89F, or 89C respectively of the disposal site shall be provided to the Division by the applicant. This evaluation shall be conducted to a depth that includes the depth of existing contamination and the total depth of the injection wells or infiltration galleries. This evaluation shall be based on borings for which the numbers, locations, and depths are sufficient to define the components of the hydrogeologic evaluation. In addition to borings, other techniques may be used to investigate the subsurface conditions at the site. These techniques may include geophysical well logs, surface geophysical surveys, and tracer studies. This evaluation shall be presented in a report that includes the following components:
[Note: The North Carolina Board for Licensing of Geologists, via letter dated April 6, 2006, North Carolina Board for Licensing of Soil Scientists, via letter dated December 1, 2005, and North Carolina Board of Examiners for Engineers and Surveyors, via letter dated December 1, 2005, have determined that preparation of hydrogeologic description documents pursuant to this Paragraph constitutes practicing geology under G.S. 89E, soil science under G.S. 89F, or engineering under G.S. 89C.]
(1) a description of the regional and local geology and hydrogeology;
(2) a description, based on field observations of the site, of the site topographic setting, streams, springs and other groundwater discharge features, drainage features, existing and abandoned wells, rock outcrops, and other features that may affect the movement of the contaminant plume and treated wastewater;
(3) changes in lithology underlying the site;
(4) depth to bedrock and occurrence of any rock outcrops;
(5) the hydraulic conductivity, transmissivity, and storativity including specific yield if an aquifer is unconfined of the affected aquifers;
(6) depth to the seasonal high water table;
(7) a discussion of the relationship between the affected aquifers of the site to local and regional geologic and hydrogeologic features; and
(8) a discussion of the groundwater flow regime of the site focusing on the relationship of the plume and remediation system to groundwater receptors, groundwater discharge features, and groundwater flow media.
(d) Demonstration of Hydraulic Control. Computer modeling or predictive calculations based on site-specific conditions shall be provided to the Division by the applicant to demonstrate that operation of the system will not cause or contribute to:
(1) the migration of contaminants into previously uncontaminated areas, and
(2) a violation of the groundwater standards at the compliance boundary.
(e) Maps and Cross-Sections. If required by G.S. 89C, a professional land surveyor shall provide location information on boundaries and physical features not under the purview of other licensed professions. Site plans or maps shall be provided to the Division by the applicant depicting the location, orientation and relationship of facility components including:
[Note: The North Carolina Board of Examiners for Engineers and Surveyors has determined, via letter dated December 1, 2005, that locating boundaries and physical features, not under the purview of other licensed professions, on maps pursuant to this Paragraph constitutes practicing surveying under G.S. 89C.]
(1) a scaled map of the site, with site-specific topographic contour intervals and showing all facility-related structures and fences within the treatment, storage, and disposal areas;
(2) locations of all test auger borings or inspection pits;
(3) the location of all wells, including usage and construction details if available; designated wellhead protection areas; ephemeral, intermittent, and perennial streams; springs; lakes; ponds; other surface drainage features; and other site activities or features that may involve possible exposure to contamination within 500 feet of all waste treatment, storage, and disposal sites;
(4) setbacks as required by Rule .1606 of this Section;
(5) delineation of the property boundaries, review boundaries, and compliance boundaries;
(6) the horizontal and vertical extent of the contaminant plume for each of the contaminants of concern, including isoconcentration lines and plume cross-sections;
(7) cross-sections depicting soil and rock layers and features to a depth including the depth of existing contamination and the total depth of the injection wells or infiltration galleries; and
(8) hydrologic features such as potentiometric surface / water table contours and the direction of groundwater flow.
(f) Engineering design documents. If required by G.S. 89C, a professional engineer shall prepare these documents. The following documents shall be provided to the Division by the applicant:
[Note: The North Carolina Board of Examiners for Engineers and Surveyors has determined, via letter dated December 1, 2005, that preparation of engineering design documents pursuant to this Paragraph constitutes practicing engineering under G.S. 89C.]
(1) engineering plans for the entire system, including treatment, storage, application, and disposal facilities and equipment except those previously permitted unless they are directly tied into the new units or are critical to the understanding of the complete process;
(2) specifications describing materials to be used, methods of construction, and means for ensuring quality and integrity of the finished product; and
(3) plans that include construction details of recovery, injection, and monitoring wells and infiltration galleries.
(g) Operating and Monitoring Plans. An operation and monitoring plan shall be provided to the Division by the applicant. These documents shall be specific to the site and include:
(1) The operating plan shall include:
(A) the operating schedule including any periodic shut-down times;
(B) required maintenance activities for all structural and mechanical elements;
(C) all consumable and waste materials with their intended source and disposal locations;
(D) restrictions on access to the site and equipment; and
(E) compliance with Rule .1605(b) of this Section.
(2) The monitoring plan shall include:
(A) the monitoring wells that will be sampled,
(B) the constituents for which those samples will be analyzed, and
(C) the schedule for sampling.
History Note: Authority G.S. 143-214.2(b); 143-215.1; 143-215.1A;
Eff. September 1, 2006;
Readopted Eff. September 1, 2018.