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HomeMy WebLinkAboutWQ0008799_Final Permit_20001227State of North Carolina Department of Environment and Natural Resources Division of Water Quality James B. Hunt, Jr., Governor Bill Holman, Secretary Kerr T. Stevens, Director December 27, 2000 � � r NCDENR NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL. RESOURCES MR. GREGORY R. BOOZER, EXECUTIVE VICE PRESIDENT OF MANUFACTURING DAN RIVER, INC. POST OFFICE BOX 261 DANVILLE, VIRGINIA 24543 Subject: Dear Mr. Boozer: Permit No. WQ0008799 Dan River, Inc. Harris, NC Finishing Plant Distribution of Residuals from the Treatment of Other Wastewater Rutherford County In accordance with your request received on April 24, 2000 as well as the additional information received on August 11, 2000 and October 19, 2000, we are forwarding herewith Permit No. WQ0008799, dated December 27, 2000, to Dan River, Inc. for the operation of a program to distribute residuals from the treatment of other wastewater. The product is a residual that is generated from the treatment of industrial wastewater at Dan River, Inc.'s finishing plant located in Harris, North Carolina. This permit is being modified to approve the distribution/land application of the residual on unspecified fields. Note that the residuals shall not be referred to as "biosolids" or as meeting the Class A requirements as stipulated in 40 CFR Part 503 in marketing them to potential recipients. Therefore, since many conditions in this permit are new or have been changed significantly, please take time to review this document thoroughly. As always, pay particular attention to the monitoring and reporting requirements contained in this permit. Failure to establish an adequate system for collecting and maintaining the required operational information will result in future compliance problems. This permit shall be effective from the date of issuance until November 30, 2003; shall void Permit No. WQ0008799, issued December 1, 1998; and shall be subject to the conditions and limitations as specified therein. If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory hearing upon written request within 30 days following receipt of this permit. This request must be in the form of a written petition, conforming to Chapter 150B of North Carolina General Statutes, and filed with the Office of Administrative Hearings, 6714 Mail Service Center, Raleigh, North Carolina 27699-6714. Unless such demands are made, this permit shall be final and binding. 1617 Mail Service Center, Raleigh, North Carolina 27699-1617 Telephone (919) 733-5083 Fax (919) 715-6048 An Equal Opportunity Affirmative Action Employer 50% recycled/10% post -consumer paper If you need additional information concerning this mat&plecontactMs. Shannon Mohr Thornburg at (919) 733-5083, extension 353. Sinc Kerr T. Stevens - cc: Southern Soil Builders, Inc. Rutherford County Health Department Asheville Regional Office, Water Quality Section Asheville Regional Office, Groundwater Section Central Offices Groundwater Section Technical Assistance and Certification Unit Non -Discharge Compliance/Enforcement Unit 2 NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES RALEfGH PERMIT FOR THE DISTRIBUTION/LAND APPLICATION OF RESIDUALS FROM THE TREATMENT OF OTHER WASTEWATER In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as amended, and other applicable Laws, Rules, and Regulations PERMISSION IS HEREBY GRANTED TO Dan River, Inc. Rutherford County FOR THE operation of a program for the distribution/land application of residuals from the treatment of other wastewater. The program shall result in the distribution of up to 290 dry tons per year of residuals generated from the treatment of industrial wastewater at the Dan River, Inc.'s finishing plant in Harris, North Carolina. The program shall be operated such that no discharge of waste to surface waters occurs, pursuant to the application received on April 24, 2000 as well as the additional information received on August 11, 2000 and October 19, 2000 and in conformity with the project plan, specifications, and other supporting data subsequently filed and approved by the Department of Environment and Natural Resources and considered a part of this permit. This permit shall be effective from the date of issuance until November 30, 2003; shall void Permit No. WQ0008799, issued October 1, 1998; and shall be subject to the following specified conditions and limitations: I. PERFORMANCE STANDARDS 1. The program for the distribution/land application of the residual product shall be effectively maintained and operated as a non -discharge system to prevent the discharge of any wastes to waters of the state resulting from the operation of this program. 2. This permit shall become voidable in the event of failure of the distribution/land application program to protect the assigned water quality standards of the surface waters and groundwater adequately. 3. The issuance of this permit shall not relieve the Permittee of the responsibility for damages to surface or groundwater resulting from the operation of the distribution/land application program. 4. In the event that the distribution/land application program is not operated satisfactorily, including the creation of nuisance conditions, the Permittee shall cease distributing/land applying the residuals, shall contact the Asheville Regional Office, and shall take any immediate corrective actions as may be required by the Division of Water Quality (Division). 5. Diversion or bypassing of untreated residuals or leachate from the wastewater and/or residuals treatment facilities shall be prohibited. All leachate shall be reused as a wetting agent for the processing of residuals or routed to the headworks of the wastewater treatment facility. 6. A copy of this permit and a spill prevention and control plan shall be maintained in all residuals transport and application vehicles. 7. No residuals shall be stored at any location other than at the wastewater treatment facility at any time, unless approval has been requested and obtained from the Division. 8. The following buffer zones shall be maintained when distributing/land applying the residuals under the conditions of this permit: a. 400 feet from residences or places of public assembly under separate ownership for surface application method; however, the buffer zone requirement may be reduced to a minimum of 100 feet upon written consent of the owner (i.e., consent forms shall be maintained by the Permittee for a minimum of five years following the distributionlland application event); b. 200 feet from residences or places of public assembly under separate ownership for subsurface residual injection method; however, the buffer zone requirement may be reduced to a minimum of 100 feet upon written consent of the owner (i.e., consent forms shall be maintained by the Permittee for a minimum of five years following the distribution/land application event); c. 100 feet from any public or private water supply source, waters classified as SA or SB, and any Class I or Class II impounded reservoir used as a source of drinking water for both methods; d. 100 feet from any streams classified as WS or B, any other stream, canal, marsh or coastal waters and any other lake or impoundment for surface application; e. 50 feet from any streams classified as WS or B, any other stream, canal, marsh or coastal waters and any other lake or impoundment for subsurface application; f. 50 feet from property lines for both surface and subsurface application methods; g. 50 feet from public right of ways for both surface and subsurface application methods; h. 10 feet from upslope interceptor drains and surface water diversions for both surface and subsurface application methods; and i. 25 feet from downslope interceptor drains, surface water diversions, groundwater drainage systems, and surface drainage ditches for both surface and subsurface application methods. 9. Specific residual application area boundaries shall be clearly marked prior to and during distribution/land application. 10. Maximum slope for the distribution/land application of residuals shall be 10 percent for surface application and IS percent for subsurface application. II. OPERATION A_ AND MAINTENANCE RE, OUTREMENTS 1. The facilities and program shall be properly maintained and operated at all tinges. 2 2. Upon classification of the facilities by the Water Pollution Control System Operators Certification Commission (WPCSOCC), the Permittee shall employ a certified operator to be in responsible charge (ORC) of the residuals distribution/land application program. The operator shall hold a certificate of the type classification assigned to the residuals distribution/land application program by the WPCSOCC. The Permittee shall also employ a certified back-up operator of the appropriate type to comply with the conditions of 15A NCAC 8G.0202. All residuals distributed/land applied under the conditions of this permit shall be land apRlied only by a person currently certified as a land application/residuals operator. 3. No residuals other than the following shall be approved for distribution/land application in accordance with this permit: - Permit Volume Source County Number (dry tons/ ear Dan River, Inc.' Rutherford NPDES Permit No. NC0083275 290 Harris, North Carolina Finishing Plant Only residuals derived from the treatment of industrial wastewater shall be approved for distribution/land application in accordance with this permit. It is the Division's understanding that domestic wastewater generated from Dan River Inc.'s Harris, North Carolina Finishing Plant is treated and disposed of through an on-site conventional sub -surface system. Septage removed from wastewater treatment/storage units associated with this system shall be removed off-site and properly disposed. Under no circumstance, shall this septage be introduced to the plant treating the industrial wastewater. A modification to this permit shall be requested to and approved by the Division if there is a desire to combine the domestic and industrial wastewater sources prior to treatment. 3. No other residual product other than that from the source specified in Condition II. 3. above shall be distributed/Iand applied under the conditions of this permit. The Permittee shall request and obtain a permit amendment from the Division for each additional source prior to acceptance into the distribution/land application program. 4. For the residuals to be distributed/land applied, the residuals shall be essentially pathogen -free, as evidenced by the testing of seven separate and representative samples of the residuals for the presence of fecal coliform in accordance with Condition Ill. 3. of this permit. Distributionfland application of the residuals shall be strictly forbidden if any sample results in a fecal coliform density of 1,000 most probable number (MPN) or coliform forming units (CFU) per gram of total dry solids. Note that utilization of the geometric mean shall not be allowed to meet this condition. 5. For the residuals to be distributed/] and applied, the following shall be satisfied: The Ceiling Concentrations (i.e., on a dry weight basis) and the Pollutant Monthly Average Concentrations (i.e., on a dry weight basis) shall be maintained: Ceiling Monthly Average Concentrations Concentrations Parameters m m Arsenic 75 41 Cadmium 85 39 Copper 4,300 1,500 Lead 840 300 Mercury 57 17 Molybdenum 75 ---- Nickel 420 420 Selenium 100 100 Zinc 7,500 2,800 6. All residuals shall be adequately stored to prevent leachate runoff prior to and following treatment. The residuals may be stored in an elevated silo, placed on a concrete pad, kept under shelter, or covered until such time as it is distributed/land applied. If an alternative storage site is to be used, approval shall first be obtained from the`Division. 7. Adequate provisions shall be taken to prevent wind erosion and surface runoff from conveying pollutants from the residuals treatment, storage and/or distribution/land application fields onto adjacent property or into any surface waters. 8. A suitable, non -direct food chain, vegetative cover crop shall be maintained on all fields to receive distributed/land applied residuals. When distributing/land applying the residuals, the application rates of plant available nitrogen (PAN) shall not exceed the following, unless prior approval has been requested and obtained from the Division: Crop PAN (pounds/acre/year Crop PAN (pounds/acre/year) Alfalfa Bermuda Grass (Hay, Pasture) Blue Grass Corn (Grain) Corn (Silage) Cotton Fescue 200 Milo 100 220 Forest (Hardwood, Softwood) 75 120 Small Grain (Wheat, Barley, Oats) 100 160 Sorghum, Sudex (Pasture) 180 200 Sorghum, Sudex (Silage) 220 70 Soybeans 200 250 Timothy, Orchard, & Rye Grass 200 Surface -applied residuals shall be plowed or disced in within 24 hours after distribution/land application on fields with no cover crop established. An acceptable cover crop shall be established within 30 days of the distribution/laud application event. 10. For fields that are prone to flooding or those that are within the 100 -year flood elevation, residuals shall be distributed/land applied only during periods of dry weather. The residuals shall be incorporated into the soil within 24 hours after distribution/land application. 11. Residuals shall not be distributed/land applied during inclement weather or until 24 hours following a rainfall event of 0.5 -inch or greater in 24 hours. Any emergency distribution/land application measures shall first be approved by the Division. 12. Residuals shall not be distributed/land applied to any field that is flooded, frozen, or snow covered. 13. Adequate provisions shall be taken to control public access to fields during active use. 14. All recipients of the distributed/land applied residuals shall be provided with an information/data sheet that contains the following minimum .information: a. The name, address, and telephone number of the person who prepared the residuals. b. The name, address, and telephone number of the person distributing/land applying the residuals. e. A description of the source of or the process by which the residuals were generated. d. A summary of the results from the most recent round of residuals sampling/monitoring. e. A summary of the volume of residuals distributed/land applied per acre. f. A summary of the nutrients (i.e., PAN, phosphorus, and potassium) applied per acre. g. A list of recommendations to the recipient of the residuals regarding field use, soil testing, pH adjustment, and other relevant agronomic information. 4 III. MONITORING AND REPORTING REQUIREMENTS 1. Any monitoring (i.e., including groundwater, surface water, residuals, soil, orplant tissue analyses) deemed necessary by the Division to ensure protection of the environment shall, be established and an acceptable sampling and reporting schedule shall be followed. 2. Proper records shall be maintained by the Permittee tracking all distribution/land application activities. The Permittee shall be responsible for developing and maintaining a consistent field numbering/identification system. Records shall contain, but shall not be necessarily limited to, the following information: a. Source of residuals; b. Date of residual application; Information regarding the location of residual application (i.e., fieid owner name, address, and telephone number; approximate field location; field number, etc.); d. Method of application; e. Weather conditions (i.e., sunny, cloudy, raining, etc.); f. Soil conditions (i.e., dry, wet, frozen, etc.); g. Type of crop or crops to be grown on field; h. Volume of residuals applied in gallons per acre, dry tons per acre, or kilograms per hectare; and i. Annual totals of dry tons per acre of residuals, annual pounds per acre of plant available nitrogen (PAN), and annual pounds per acre of phosphorus applied to each field. 3. All residuals included in this permit shall be monitored by the Perinittee for compliance with Condition IL 4. of this permit. The results of all analyses shall be maintained on file by the Permittee for a minimum of five years. For the first calendar year following this permit's issuance, each batch of residuals shall be tested prior to distribution/land application. A batch shall be defined as a continuous application of residuals for three (3) consecutive days. If each batch complies with the limits set forth in Condition 11.4., then the monitoring frequency may be reduced to an annual basis. Note, however, if the wastewater treatment plant is reseeded from a facility that treats domestic wastewater (i.e., Town of Forest City) for any reason (i.e., upset of the biological process, etc.), the Permittee shall test each batch of residuals prior to distribution/land application for another calendar year, and the monitoring frequency may be reduced only as described above. 4. A residuals analysis shall be conducted annually from the date of permit issuance and any time that a change in the manufacturing process of the finishing plant occurs. The results of all residuals analyses shall be maintained on file by the Permittee for a minimum of five years. If distribution/land application occurs at a frequency less than every annually, a residuals analysis will be required for each instance of distribution/land application. The residuals analysis shall include, but shall not necessarily be limited to, the following parameters: Aluminum Ammonia -Nitrogen Arsenic Cadmium Calcium Copper Lead Magnesium Mercury Molybdenum Nickel Nitrate -Nitrite Nitrogen Percent Total Solids pH Phosphorus Potassium Selenium Sodium Total Kjeldahl Nitrogen Zinc Plant Available Nitrogen (by calculation) After the residuals have been monitored for two years at the above frequency, the Permittee may submit a request to the Division for a permit modification for the reduction of the frequency of monitoring for pollutant concentrations, but in no case shall the frequency of monitoring be less than once per year when residuals are distributed/land applied. 5. A Toxicity Characteristics Leaching Procedure (TCLP) analysis shall be conducted by the Permittee annually. The TCLP analysis shall include the following parameters (i.e., note the regulatory level in milligrams per liter in parentheses): Arsenic (5.0) Cadmium (1.0) Chlorobenzene (100.0) o -Cresol (200.0) Cresol (200.0) 1,2-Dichloroethane (0.5) Endrin (0.02) Hexachlorobenzene (0.13) Lead (5.0) Methoxychlor (10.0) Pentachlorophenol (100.0) Silver (5.0) Trichloroethylene (0.5) 2,4,5 -TP (Silvex) (1.0) Barium (100.0) Benzene (0.5) Carbon tetrachloride (0.5) Chlordane (0.03) Chloroform (6.0) Chromium (5.0) m -Cresol (200.0) p -Cresol (200.0) 2,4-D (10.0) 1,4 -Dichlorobenzene (7.5) 1, 1 -Dichloroethylene (0.7) 2,4-Dinitrotoluene (0.13) Heptachlor (and its hydroxide) (0.008) Hexachlaro-1,3-butadiene (0.5) Hexachloroethane (3.0) Lindane (0.4) Mercury (0.2) Methyl ethyl ketone (200.0) Nitrobenzene (2.0) Pyridine (5.0) Selenium (1.0) Tetrachloroethylene (0.7) Toxaphene (0.5) 2,4,5 -Trichlorophenol (400.0) 2,4,6 -Trichlorophenol (2.0) Vinyl chloride (0.2) After the residuals have been monitored annually for two years, the Permittee may submit a request to the Division for a permit modification to reduce the frequency of the TCLP analysis. in no case, however, shall the frequency of TCLP monitoring be less than once per permit cycle when residuals are distributed/land applied. 6. Three copies of all required monitoring and reporting requirements as specified in Condition III. 1., Condition III. 2., Condition III. 3., Condition 111. 4., and Condition III. 5. shall be submitted annually on or before March I" of the year following the distribution/land application event to the following address: NC Division of Water Quality Water Quality Section Non -Discharge Compliance/Enforcement Unit 1617 Mail Service Center Raleigh, North Carolina 27699-1617 7. Noncompliance Notification: The Permittee shall report by telephone to the Asheville Regional Office, telephone number (8 28) 251- 6208, as soon as possible, but in no case more than 24 hours or on the next working day following the occurrence or first knowledge of the occurrence of any of the following: a. Any occurrence with the residuals distribution/land application program that results in the distribution/land application of significant amounts of wastes which are abnormal in quantity or characteristic. b. Any failure of the residuals distribution/land application program resulting in a release of material to surface waters. c. Any time that self-monitoring information indicates that the residuals distribution/land application program has gone out of compliance with the conditions and limitations of this permit or the parameters on which the program was designed. d. Any process unit failure, due to known or unknown reasons that renders the residuals distribution/land application program incapable of adequate residual treatment. e. Any spillage or discharge from a vehicle or piping system during transportation of residuals. Persons reporting such occurrences by telephone shall also file a written report in letterform within five days following first knowledge of the occurrence. This report shall outline the actions taken or proposed to be taken to ensure that the problem -does not recur. IV. GROUNDWATER REQUIREMENTS 1. No residuals shall be applied to any field when the vertical se aration between the residuals and the water table is less than three feet. Verification of the water table elevation by soil borings shall be conducted on all fields within 24 hours prior to application of residuals. After verification of the water table is concluded, the soil borings shall be filled in with native soil to decrease the chance of residuals contaminating the surficial aquifer. 2. The COMPLIANCE BOLTNDARY for the disposal system is specified by regulations in 15A NCAC 2L (i.e., Groundwater CIassifications and Standards). The Compliance Boundary for disposal systems constructed after December 31, 1983 is established at either (1) 250 feet from the waste disposal area, or (2) 50 feet within the property boundary, whichever is closest to the waste disposal area. An exceedance of Groundwater Quality Standards at or beyond the Compliance Boundary is subject to immediate remediation action in addition to the penalty provisions applicable under North Carolina General Statute § 143-215.6A(a)(1). In accordance with 15A NCAC 2L, a REVIEW BOUNDARY is established around disposal systems midway between the Compliance Boundary and the perimeter of the waste disposal area. Any exceedance of standards at the Review Boundary shall require remediation action on the part of the Permittee. 3. Any groundwater quality monitoring, as deemed necessary by the Division, shall be provided. V. INSPECTIONS The Permittee or his designee shall inspect the residuals storage, transport, and treatment facilities to prevent malfunctions and deterioration, operator errors and discharges which may cause or lead to the release of wastes to the environment, a threat to human health, or a nuisance. The Permittee shall maintain an inspection log or summary including at least the date and time of inspection, observations made, and any maintenance, repairs, or corrective actions taken by the Permittee. This log of inspections shall be maintained by the Permittee for a period of five years from the date of the inspection and shall be made available to the Division or other permitting authority, upon request. 2. Any duly authorized officer, employee, or representative of the Division may, upon presentation of credentials, enter and inspect any property, premises or place on or related to the treatment site or facility at any reasonable time for the purpose of determining compliance with this permit; may inspect or copy any records that must be kept under the terms and conditions of this permit; and may obtain samples of groundwater, surface water, or leachate. VI. GENERAL CONDITIONS L This permit shall become voidable unless the distribution/land application activities are carried out in accordance with the conditions of this permit, the supporting materials, and in the manner approved by this Division. 2. This permit shall be effective only with respect to the nature and volume of residuals described in the application and other supporting data. 3. This permit shall not be automatically transferable. In the event that there is a desire for the facilities and/or program to change ownership or a name change of the Permittee, a formal permit request shall be submitted to the Division accompanied by documentation from the parties involved and other supporting materials as may be appropriate. The approval of this request shall be considered on its merits and may or may not be approved. 4. Failure to abide by the conditions and limitations contained in this permit may subject the_ Permittee to an enforcement action by the Division in accordance with North Carolina General Statute §143-215.6A through § 143-215.6C. 5. The annual administering and compliance fee shall be paid by the Permittee within 30 days after being billed by the Division. Failure to pay the fee accordingly may cause the Division to initiate action to revoke this permit as specified by 15 NCAC 2H .0205 (c)(4). 6. The issuance of this permit shall not preclude the Permittee from complying with any and all statutes, rules, regulations, or ordinances that may be imposed by other government agencies (i.e., local, state, and federal) which have jurisdiction. 7. The Permittee, at least six months prior to the expiration of this permit, shall request its extension. Upon receipt of the request, the Commission shall review the adequacy of the facilities described therein, and if warranted, shall extend the permit for such period of time and under such conditions and limitations a$ it may deem appropriate. S. This permit may be modified, or revoked and reissued to incorporate any conditions, limitations, and monitoring requirements the Division deems necessary in order to adequately protect the environment and public health. Perrot issued tWLINA enty-seventh day of December, 2000 NORTH E NTAL MANAGEMENT COMMISSION Kerr T. Stevens, Director Division of Water Quality By Authority of the Environmental Management Commission Permit Number WQ0008799 WATER POLLUTION CONTROL SYSTEM OPERATORS CERTIFICATION COMMISSION CLASSIFICATION RATING SHEET FOR WATER POLLUTION CONTROL SYSTEMS FACILITY INFORMATION: MAILING ADDRESS: o c 2 6 / IJ qAI V1& . I/%� z� , COUNTY:41-671 ' zd CONTACT PERSON: �Nt r� rc �c TELEPHONE: ( 02,P) 2 41R - 203 7 PERMIT NO: _DEO P7 q4 Check One: NC WQ �� HEALTH DP ORC: TELEPHONE:(100)t//--_5 2 7 RATING INFORMATION: (Before completing this section, please refer to pages 2-4) PERMITTED FLOW: MGD BNR? YES NO CHECK CLASSIFICATION: WASTEWATER: 1 2 3 4 COLLECTION: 1 2 3 4 SPRAY IRRIGATION SUBSURFACE LAND APPLICATION i-� PHYSICAL/CHEMICAL GRADE I GRADE II RATED BY:REGION: DATE: D G REGIONAL OFFICE TELEPHONE NUMBER: ('l{ZV—G ZO F. EXT: 2 72 Classification of Biolop-ical Water Pollution Control Treatment Systems: Grade I Biological WPCS - Septic tanklsand filter systems - Biological Iagoon systems - Constructed wetlands and associated appurtenances Grade II Biological WPCS - Systems that utilize an activated sludge or fixed growth process with a permitted flow less than or equal to 0.5 million gallons per day (mgd) Grade III Biological WPCS - Systems that utilize an activated sludge or fixed growth process with a permitted flow of greater than 0.5 through 2.5 million gallons per day (mgd) - Grade 11 systems that are required to achieve biological nutrient reduction Grade 1V Biological WPCS - Systems that utilizing an activated sludge or fixed growth process with a permitted flow of greater than 2.5 million gallons per day (mgd) - Grade III systems that are required to achieve biological nutrient reduction * Biological Nutrient Reduction - The reduction of total nitrogen or total phosphorous by an activated sludge or fixed growth process as required by the facilities permit. Classification of Collection Water Pollution Control Systems: (whichever provides lowest grade) Same grade as biological water pollution control system. Grade of system: Based on population served: 1,500 or Less = Grade I 1,501 to 15,000 = Grade II 15,001 to 50,000 = Grade III 50,001 or more = Grade IV Classification of Spray Irrigation Water Pollution Control Systems: Systems which utilize spray irrigation for the reuse or disposal of wasterwater. These systems include: septic tanks, sand filter, oil/water separators, lagoons, storage basins, screening, sedimentation. Systems other than those listed above shall be subject to additional classification. Classification of Land Application of Residuals Systems: ✓ Systems permitted and dedicated for land application of residuals that are produced by a water pollution control system or contaminated soils. Classification of Physical/Chemical Water Pollution Control Treatment Systems: Grade I Physical/Chemical: Any water pollution control system that utilizes a primarily physical process to treat wastewater. This classification includes groundwater remediation systems. ** Grade II Physical/Chemical: Any water pollution control system that utilizes a primarily chemical process to treat wastewater. This classification includes reverse osmosis, electrodialysis, and ultrafiltration systems. ** ** Any water pollution control system that utilizes a phyicaUchemical process to enhance an activated sludge orfixed growth process, shall not be subject to additional classification. Classification of Subsurface Water Pollution Control Systems: Systems which utilize the soil for subsurface treatment and disposal of wastewater and/or are required to have a certified operator under 15A NCAC 18A.1961. *** *** Any subsurface system that has as part of its treatment process a water pollution control systems that may be classif ed under Rules .0302 through .0307 of this section shall be subject to addional classification. Definitions Activated Sludge - shall mean a biological wastewater treatment process in which predominantly biodegradable polluntants in wastewater are absorbed, or adsorbed by living aerobic organisms and bacteria. Chemical Process - shall mean a_wastewater pollution control system process consisting exclusively of the addition of chemicals to treat wastewater. Collection System - shall mean a continuous connections of pipelines, conduits, pumping stations, and other related constructions used to conduct wastewater to the water pollution control system. Electrodialysis System - shall mean a system utlizing a selective separation of dissolved solids process that is based on electrical charge and diffusion through a semipermeable membrane. Physical Process - shall mean any water pollution control system process consisting of electrodialysis, adsorption, absorption, air stripping, gravimetric sedimentation, floation, and filtration as a means of treatment. Reverse Osmosis System - shalI mean a system which utilizes solutions and semipermable membranes to separate and treat wastewater. Ultrafiltration System - shall mean a system which utilizes a membrane filter to remove pollutants from wastewater. Water Pollution Control System - shall mean any system for the collection, treatment, or disposal of wastewater and is classified under the provision of G.S. 90A-37. Nose: Please refer to G.S. 90A-37 for additional information and definitions.