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HomeMy WebLinkAboutWQ0011614_Final Permit_19971010State of North Carolina Department of Environment, Health and Natural Resources Division of Water Quality jawdftl James B. Hunt, Jr., Governor Wayne McDevitt, Secretary C) E H N Fl A. Preston Howard, Jr., P.E., Director October 10, 1997 Edward M. Gore, Sr., President Ocean Ridge Farms, Inc. 351 Ocean Ridge Parkway Ocean Isle Beach, North Carolina 28469 Subject: Permit No. WQ0011614 Ocean Ridge Farms, Inc. Ocean Ridge Plantation Wastewater Spray Irrigation Brunswick County Dear Mr. Gore: In accordance with the amendment request received April 30, 1997, we are forwarding herewith Permit No. WQ0011614, dated October 10, 1997, to Ocean Ridge Farms, Inc. for the construction and operation of the subject wastewater treatment and spray irrigation facilities. This permit is being amended as requested to allow the construction and operation of two additional 150,000 GPD wastewater treatment phases which will bring the total wastewater treatment and reuse capacity to 400,000 GPD. Please be advised, as soon as possible but at least 180 days prior to land applying residuals from the subject wastewater treatment facility, the land application permit issued to S & B Maintenance, WQ0000783, shall be amended to include the residuals from the Ocean Ridge Farms, Inc. WWTP. This permit shall be effective from the date of issuance until. December 31, 2000, shall void Permit No. WQ0011614 issued November 22, 1996, and shall be subject to the conditions and limitations as specified therein. Please pay particular attention to the monitoring requirements in this permit. Failure to establish an adequate system for collecting and maintaining the required operational information will result in future compliance problems. If any parts, requirements, or Iimitations contained in this permit are unacceptable, you have the right to request an adjudicatory hearing upon written request within thirty (30) days following receipt of this permit. This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, P.O. Drawer 27447, Raleigh, NC 27611-7447. Unless such demands are made this permit shall be final and binding. P.O, Box 29635, Raleigh, North Carolina 27626-0535 Telephone (919) 733-5083 FAX (919) 733-0719 An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer paper One set of approved plans and specifications is being forwarded to you. If you need additional information concerning this matter, please contact Mr. Michael D. Allen at (919) 733-5083 extension 547. Sincerel -LA. Preston Howard, Jr., P.E. cc: Brunswick County Health Department Houston and Associates, P.A. Wilmington Regional Office, Water Quality Section Wilmington Regional Office, Groundwater Section Bob Cheek, Groundwater Section, Central Office Technical Assistance and Certification Unit Non -Discharge Compliance/Enforcement Unit NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION DEPARTMENT OF ENVIRONMENT, HEALTH AND NATURAL RESOURCES RALEIGH SPRAY IRRIGATION SYSTEM PERMIT 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 Ocean Ridge Farms, Inc. Brunswick County FOR THE construction and continued operation of a 400,000 GPD wastewater collection, treatment, and spray irrigation system. The wastewater collection system will consist of a pressure sewer collection system having two hundred and fifty-eight (258) 12 GPM pump stations with simplex pumps and high water alarms to serve individual residential units, a 25 GPM pump station with duplex pumps and high water alarms to serve the clubhouse, approximately 14,206 linear feet of 2-inch pressure sewer, approximately 3,531 linear feet of 3-inch pressure sewer, approximately 5,920 linear feet of 4-inch pressure sewer, approximately 1,155 linear feet of 6-inch pressure sewer, and a 525 GPM influent pump station with duplex pumps, high water alarms, and approximately 7,700 linear feet of 8-inch force main. The wastewater treatment system will be built in three phases: The existing Phase I consists of a 100,000 GPD wastewater treatment plant having a 28,903 gallon flow equalization basin with dual 100 GPM pumps and an 80 CFM blower, a manually cleaned bar screen, flow splitter box, dual 62,500 gallon fine bubble aeration basins with three 290 CFM blowers, dual 13,284 gallon clarifiers, a 22,620 gallon aerated sludge holding tank, dual bed media filters each with 34.5 square feet of surface area, a 1,436 gallon dosing tank with dual 190 GPM pumps, UV disinfection, continuous on-line monitoring and recording for turbidity, and continuous on-line monitoring and recording for flow. ' Phases IT and III will each consist of a 150,000 GPD wastewater treatment plant having a 37,500 gallon flow equalization chamber with dual 100 GPM pumps and a 100 CFM blower, a manually cleaned bar screen and flow splitter box to be built in Phase II which will eventually serve the entire facility, a single 187,600 gallon fine bubble aeration basin with three.415 CFM blowers, dual 15,115 gallon clarifiers, a 30,000 gallon aerated sludge holding tank, dual bed media filters each with 52.0 square feet of surface area, a 3,030 gallon dosing tank with dual 260 GPM pumps, UV disinfection, continuous on-line monitoring and recording for turbidity, and continuous on-line monitoring and recording for flow. The wastewater treatment facility also consists of a dual power source, a 500,000 gallon lined five-day detention pond, a proposed 1,500,000 gallon lined five-day detention pond, and a 105 GPM pump station with duplex pumps, high water alarms, and approximately 3,000 linear feet of 4-inch force main to transport the reclaimed water to the storage pond. The spray irrigation facility shall consist of a 6,500,000 gallon storage pond, a 1,880 GPM pump station with duplex pumps, high water alarms, and approximately 3,540 linear feet of 10-inch force main to transport reclaimed water to the golf course irrigation wet well, and approximately 5,340,000 square feet of spray fields (existing golf course). The wastewater collection, treatment and reuse systern will serve two hundred and fifty-eight (25& 3- bedroom residential units and one (1) clubhouse in the Ocean Ridge Plantation, Phase I, with no discharge of wastes to the surface waters, pursuant to the application received October 21, 1996, and in conformity with the project plan, specifications, and other supporting data subsequently filed and approved by the Department of Environment, Health and Natural Resources and considered a part of this permit. This permit shall be effective from the date of issuance until December 31, 2000, shall void Permit No. WQ0011614 issued November 22, 1996, and shall be subject to the following specified conditions and limitations: I. PERFORMANCE STANDARDS 1. Upon completion of construction and prior to operation of this permitted facility, a certification must be received from a professional engineer certifying that the permitted facility has been installed in accordance with this permit, the approved plans and specifications, and other supporting materials. Mail the Certification to the Non -Discharge Permitting Unit, P.O. Box 29535, Raleigh, NC 27626-0535. 2. The Wilmington Regional Office, telephone number (910) 395-3900, shall be notified at least forty-eight (48) hours in advance of operation of the installed facilities so that an in - place inspection can be made. Such notification to the regional supervisor shall be made during the normal office hours from 8:00 a.m. until 5:00 p.m. on Monday through Friday, excluding State Holidays. 3. The spray irrigation facilities shall be effectively maintained and operated at all times so that there is no discharge to the surface waters, nor any contamination of ground waters which will render them unsatisfactory for normal use. In the event that the facilities fail to perform satisfactorily, including the creation of nuisance conditions or failure of the irrigation area to adequately assimilate the wastewater, the Permittee shall take immediate corrective actions including those actions that may be required by the Division of Water Quality (Division), such as the construction of additional or replacement wastewater treatment and disposal facilities. 4. The issuance of this permit shall not relieve the Permittee of the responsibility for damages to surface or groundwaters resulting from the operation of this facility. 5. The residuals generated from these treatment facilities must be disposed in accordance With General Statute 143-215.1 and in a manner approved by the Division. 6. Diversion or bypassing of the untreated wastewater from the treatment facilities is prohibited. 7. The following buffers shall be maintained: a) 100 feet between wetted area and water supply wells, b) 100 feet between wetted area and waters classified as SA, c) 25 feet between wetted area and surface waters not classified as SA, d) 100 feet between wastewater treatment units and wells, and e) 50 feet between wastewater treatment units and property lines. 2 Public access to the irrigation sites shall be controlled during active site use. Such controls may include the posting of signs showing the activities being conducted at each site. A sign shall be posted in plain sight in the club house showing these activities. II. OPERATION AND MAINTENANCE REQUIREMENTS The facilities shall be properly maintained and operated at all times. Upon classification of the facility by the Water Pollution Control System Operators Certification Commission (WPCSOCC), the Permittee shall employ a certified wastewater treatment plant operator to be in responsible charge (ORC) of the wastewater treatment facilities. The operator must hold a certificate of the type and grade at least equivalent to or greater than the classification assigned to the wastewater treatment facilities by the WPCSOCC. The Permittee must also employ a certified back-up operator of the appropriate type and grade to comply with the conditions of 15A NCAC 8A .0202. The ORC of the facility must visit each Class I facility at least weekly and each Class II, III, and IV facility at least daily, excluding weekends and holidays, and must properly manage and document daily operation and maintenance of the facility and must comply with all other conditions of 15A NCAC 8A .0202. Once the facility is classified, the Permittee must submit a letter to the WPCSOCC which designates the operator in responsible charge within thirty days after the wastewater treatment facilities are 50% complete. 3. A suitable vegetative cover shall be maintained on the spray irrigation areas. 4. Irrigation shall not be performed during inclement weather or when the ground is in a condition that will cause runoff. 5. Adequate measures shall be taken to prevent wastewater runoff from the spray field. 6. The facilities shall be effectively maintained and operated as a non -discharge system to prevent the discharge of any wastewater resulting from the operation of this facility. 7. The application rate shall not exceed a cumulative loading of 62.4 inches over any twelve (12) month period at an instantaneous application rate not to exceed 0.05 inches per dose. 8. No type of wastewater other than that from Ocean Ridge Plantation and the surrounding area shall be sprayed onto the irrigation area. 9. The Permittee shall provide for the pump station(s) and force main(s) the following items: a. Pump on/off elevations located so that 2-8 pumping cycles may be achieved per hour in any centralized pump station serving more than one building. b. At least 24 hours of storage capacity above the high water alarm activation level for any simplex pump station serving a single building. c. An air relief valve located at all high points along the force main. d. A screened vent for the wet well. e. Fillets located in the wet well(s) at the intersection of the flooring and sidewalls. f. Three feet of cover (minimum) over the force main or the use of ferrous material where three feet cannot be maintained. g . Sufficient devices which will protect the pump station from vandals. h. Flood protection if the pump station is located below the 100-year flood elevation. 10. The permittee shall maintain on hand for immediate installation a supply of spare, fully operational pump units of each type used in the pressure sewer system. The number of pumps on hand shall not be less than 10 percent of the number of installed units or one unit, whichever is greater. 11. Each individual pump station'shall be clearly and conspicuously posted with the telephone number of the owner/operator of the pressure sewer system and instructions to call the number in the event of high water alarm activation. 12. All wastewater shall be routed to the five-day holding pond should the limit for fecal coliform (daily maximum concentration of 25 per 100 ml) or turbidity (instantaneous maximum of 10 NTU) be exceeded, until such time that the problems associated with the treatment capability of the wastewater treatment plant have been corrected. The wastewater in the five-day holding pond shall be pumped back to the treatment plant for retreatment or treated in the five-day pond prior to discharge to the storage pond. MONITORING AND REPORTING REQUIREMENTS 1. Any monitoring (including groundwater, surface water, soil or plant tissue analyses) deemed necessary by the Division to insure surface and ground water protection will be established and an acceptable sampling reporting schedule shall be followed. 2. As an indicator of proper operation and maintenance, the facility shall produce an effluent in compliance with the following limitations: Parameter Monthly Averagea Daily (Instantaneous) Maximum Flow BOD5 (5-day, 20°C) NH3 as N TSS Fecal Coliform Turbidity 400,000 GPDd 10 mg/l 4 mg/1 5 mg/1 14 per 100 mlb 15 mg/1 6 mg/1 10 mg/1 25 per 100 ml 10 NTU a Monthly averages for all but fecal coliform shall be the arithmetic mean of all samples collected during the reporting period. b Monthly average for fecal coliform shall be the geometric mean of all samples collected during the reporting period. Daily maximum shall be the maximum value of all samples collected during the reporting period. d The monthly average shall not exceed 100,000 GPD for Phase I, 200,000 for Phase I and II together, and 400,000 GPD with all phases constructed and operational. The effluent from the subject facilities shall be monitored, by the Permittee, at the point prior to discharge to the storage pond for the following parameters: Parameter SamplingSgmpling Point Sampling Frequency Type of Sam le Flow Turbidity BOD5 (5-day, 20°C) NH3 as N TSS Fecal Coliform Settleable Matter NO3 TDS TOC Chloride Influent or Effluent Continuous Recording Effluent Continuous Recording Effluent *2/Month Composite Effluent *2/Month Composite Effluent *2/Month Composite Effluent of first pond *2/Month Grab Effluent Daily Grab Effluent Triannually Grab Effluent *Triannually Grab Effluent *Triannually Grab Effluent *Triannually Grab 4 The effluent pH shall not be less than 6.0 standard units nor greater than 9.0 standard units. 2/Month sampling frequency only during the months of April through October. During the remainder of the year, these parameters shall be monitored monthly. Triannually sampling shall be conducted during March, July, and November. If Groundwater sampling indicates or predicts problems with the compliance with Groundwater Standards, this permit will be modified to include additional and/or more restrictive limitations. 3. Adequate records shall be maintained by the Permittee tracking the amount of wastewater disposed. These records shall include, but are not necessarily limited to the following information: a. date and time of irrigation, b. volume of wastewater irrigated, c . zone irrigated, d. length of time zone is irrigated, e. continuous weekly, monthly, and year-to-date hydraulic (inches/acre) loadings for each zone, f . weather conditions, and g . maintenance of cover crops. 4. Three (3) copies of all operation and disposal records (as specified in condition III 3) on Form NDAR-1 shall be submitted on or before the last day of the following month. Three (3) copies of all effluent monitoring data (as specified in condition III 2) on Form NDMR-1 shall be submitted on or before the last day of April, August, and December. All information shall be submitted to the following address: NC Division of Water Quality Water Quality Section Non -Discharge Compliance/Enforcement Unit Post Office Box 29535 Raleigh, North Carolina 27626-0535 5. A record shall be maintained of all residuals removed from this facility. This record shall include the name of the hauler, permit authorizing the disposal or a letter from a municipality agreeing to accept the residuals, date the residuals were hauled, and volume of residuals removed. 6. A maintenance log shall be maintained at this facility including but not limited to the following items: a. Daily sampling results including settleable matter and dissolved oxygen in the aeration basin and at the clarifier weir. b . Visual observations of the plant and plant site. c. Record of preventative maintenance (changing of filters, adjusting belt tensions, alarm testing, diffuser inspections and cleanings, etc.).. d . Date of calibration of flow measurement device. e. Date and results of power interruption testing on alternate power supply. 5 7. Noncompliance Notification: The Permittee shall report by telephone to the Wilmington Regional Office, telephone number (910) 395-3900, 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 at the wastewater treatment facility which results in the treatment of significant amounts of wastes which are abnormal in quantity or characteristic, such as the dumping of the contents of a sludge digester; the known passage of a slug of hazardous substance through the facility; or any other unusual circumstances. b. Any process unit failure, due to known or unknown reasons, that render the facility incapable of adequate wastewater treatment such as mechanical or electrical failures of pumps, aerators, compressors, etc. c. Any failure of a pumping station, sewer line, or treatment facility resulting in a by-pass directly to receiving waters without treatment of all or any portion of the influent to such station or facility. d. Any time that self -monitoring information indicates that the facility has gone out of compliance with its permit limitations. Persons reporting such occurrences by telephone shall also file a written report in letter form within five (5) days following first knowledge of the occurrence. This report must outline the actions taken or proposed to be taken to ensure that the problem does not recur. IV. GROUNDWATER„ REQUIREMENTS Monitor wells MW-1, MW-2, and MW-3 (depicted on Attachment A) shall be sampled initially after construction and thereafter every March, July, and November for the following parameters: Water Level pH Chloride Total Phosphorous Fecal Coliforms Total Dissolved Solids (TDS) Total Ammonia Total Organic Compounds (TOC) Nitrate (NO3) Volatile Organic Compounds - In November only using one of the following: (A) Standard Method 6230D, PQL at 0.5 ug/L or less (B) Standard Method 621OD, PQL at 0.5 ug/L or less (C) EPA Method 8021, Low Concentration, PQL at 0.5 ug/L orless (D) EPA Method 8260, Low Concentration, PQL at 0.5 ug/L or less (E) Another method with prior approval by the Groundwater Section Chief Any method used must meet the following qualifications: (1) A laboratory must be DWQ certified to run any method used. (2) The method used must, at a minimum, include all the constituents Iisted in Table VIH of Standard Method 6230D. (3) The method used must provided a PQL at 0.5 ug/L or less which must be supported by laboratory proficiency studies as required by the DWQ Laboratory Certification Unit. Any constituents detected above the MDL but below the PQL at 0.5 ug/L must be qualified (estimated) and reported. 2 If any volatile organic compounds are detected by the methods listed, then the Wilmington Regional Office Groundwater Supervisor, telephone number (910) 395-3900, must be contacted immediately for further instructions regarding any additional follow-up analyses required. The results of all initial and follow-up analyses must be submitted simultaneously. The measurement of water levels must be made prior to sampling for the remaining parameters. The depth to water in each well shall be measured from the surveyed point on the top of the casing. The measuring points (top of well casing) of all monitoring wells shall be surveyed to provide the relative elevation of the measuring point for each monitoring well. If TOC concentrations greater than 10 mg/1 are detected in any downgradient monitoring well, additional sampling and analysis must be conducted to identify the individual constituents comprising this TOC concentration. If the TOC concentration as measured in the background monitor well exceeds 10 mg/l, this concentration will be taken to represent the naturally occurring TOC concentration. Any exceedances of this naturally occurring TOC concentration in the downgradient wells shall be subject to the additional sampling and analysis as described above. The results of the sampling and analysis must be received on Form GW-59 (Groundwater Quality Monitoring: Compliance Report Form) by the Groundwater Section, Permits and Compliance Unit, P.O. Box 29578 Raleigh, N.C. 27626-0578 on or before the last working day of the month following the sampling month. 2. The COMPLIANCE BOUNDARY and REVIEW BOUNDARY for the spray irrigation areas shall be established at the property boundary in accordance with 15A NCAC 2H .0219 (k)(1)(C)(I)(III). 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 General Statute 143-215.6A(a)(1). 3. The COMPLIANCE BOUNDARY for the disposal system (storage pond) is specified by regulations in 15A NCAC 2L, Groundwater Classifications and Standards. The Compliance Boundary is for the disposal system 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 General Statute 143-215.6A(a)(1). In accordance with 15A NCAC 2L, a REVIEW BOUNDARY is established around the 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. 4. Any additional groundwater quality monitoring, as deemed necessary by the Division, shall be provided. V . INSPECTIONS Adequate inspection, maintenance, and cleaning shall be provided by the Permittee to insure proper operation of the subject facilities. 2. The Permittee or his designee shall inspect the wastewater treatment and disposal 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 keep 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 three years from the date of the inspection and shall be made available upon request to the Division or other permitting authority. 3. 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 disposal 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 maintained under the terms and conditions of this permit, and may obtain samples of groundwater, surface water, or leachate. VI. GENERAL CONDITIONS This permit shall become voidable unless the facilities are constructed in accordance with the conditions of this permit, the approved plans and specifications, and other supporting data. 2. This permit is effective only with respect to the nature and volume of wastes described in the application and other supporting data. 3. This permit is not transferable. In the event there is a desire for the facilities to change ownership, or there is a name change of the Permittee, a formal permit request must be submitted to the Division accompanied by an application fee, documentation from the parties involved, and other supporting materials as may be appropriate. The approval of this request will 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 to 143-215.6C. 5. The issuance of this permit does not preclude the Permittee from complying with any and all statutes, rules, regulations, or ordinances which may be imposed by other government agencies (local, state, and federal) which have jurisdiction. 6. A set of approved plans and specifications for the subject project must be retained by the Permittee for the life of the project. 7. The annual administering and compliance fee must be paid by the Permittee within thirty 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). 8. The Permittee, at least six (6) months prior to the expiration of this permit, shall request its extension. Upon receipt of the request, the Commission will review the adequacy of the facilities described therein, and if warranted, will extend the permit for such period of time and under such conditions and limitations as it may deem appropriate. 9 The Operational Agreement previously signed (attached) between the Permittee and the Environmental Management Commission has been incorporated herein by reference and is a condition of this Permit. Noncompliance with the terms of the Operational Agreement shall subject the Permittee to all sanctions provided by North Carolina General Statute 143- 215.6A to 143-215.6C for violation of or failure to act in accordance with the terms and conditions of this Permit. Permit issued this the tenth day of October, 1997 NORTH C LINA ENVIRONMENTAL MANAGEMENT COMMISSION A. Preston Howard, Jr., P.E., Director Division of Water Quality By Authority of the Environmental Management Commission Permit Number WQ0011614 Permit No. WQ0011614 October 10, 1997 ENGINEER'S CERTIFICATION I, , as a duly registered Professional Engineer in the State of North Carolina, having been authorized to observe (periodically, weekly, full time) the construction of the project, , for the Project Name Location Permittee hereby state that, to the best of my abilities, due care and diligence was used in the observation of the construction such that the construction was observed to be built within substantial compliance and intent of this permit, the approved plans and specifications, and other supporting materials. Signature Date Registration No. 10 J � gliead I 31S t6 47 I ,iitf 1 - B � 01d haliaite Ch 111 •\ �nIE � I s I'll - 3, •�, � :' i} g -- Co un � y '1 } � Ir`, �.tF1 �.. -'�— �• 05 9itGpCf t 4 Motel -: �� - • f 17 Grissettoum :, - 1171',-' � ..—�s-'ai_.— �-` -�- • `-� �--'-off �, �� l .i`.�\, / + +.... ,;1 1 l _ _ _ ^ ..� . �--mot'. �:.},� �/ — . •�� � � - r 11 t } r. I 'I �� '�- - +•'`' _ isle I ' . Or .. �� r` 45 JI Pit usejj 7,7 .17 b- �} I �-1 �• - V — — so Pleasant Vie WHO �� - \"�� �� r- yr� �• � � cm so 52 .11163 ��\ , , r � � �1 � �' �'•� ' �.! ; �'� I� 1 �-f en pit 1` ss Pleasant View Gem y �' �-"�•�� 1� j � yt• —ASit ' l \ , �T�pdns ATTACHMENT A suevEnrec SAW -A OCEAN RIDGE FARMS, INC. OCEAN RIDGE PLANTATION`+' ` WASTEWATER SPRAY IRRIGATION SYSTEM , BRUNSWICK COUNTY PERMIT NO. W00011614 L'w (MW) MONITOR WELLS �. bt+�o7mr- I 1 r 1 R STATE OF NORTH CAROLINA COU TY OF BR�lswzc t Permit No. �a This AGREEMENT made pursuant to G.S. 143-215.1 (di) and entered into this 30th day of AUGUST , 19 96 , by and between the North Carolina Environmental Management Commission, an agency of the State of North Carolina, hereinafter Down as the COMMISSION; and OCEAN R= FAMZ, INC. , a corporation/general partnership registered/licensed to do business in the State of North Carolina, hereinafter known as the DEVELOPER. WITNESSETH: 1. The DEVELOPER is the owner of the certain lands lying in BgrNgWrX County, upon which it is erecting and will erect dwelling units and other improvements, said development to be known as OCEAN RIDGE PLANTATION (hereinafter the Development). ne— DEVE nPER dts - - - U system with pumps, wasrew=r treatment . y Ll yy ,i11r3 tV 1..U1�i7LL Y1rL C1 vACaL,:A LVi.l u.�(11L works and/or disposal facilities (hereinafter Disposal System) to provide sanitary sewage disposal to serve the Development on said lands. 3. The DEVELOPER has applied to the COMMISSION for the issuance of a permit pursuant to G.S. 143- 215.1 to construct, maintain, and operate the Disposal System. 4. The DEVELOPER has created or shall create unit ownership in said dwellings units, other improvements and lands through filing of a Declaration of Unit Ownership (hereinafter Declaration), pursuant to Chapter 47C of the North Carolina General Statutes. 5. The DEVELOPER has caused to be formed or will cause to be formed at the time of filing of the Declaration, the (Unit Owners AssociatiQn} OCEAN RIDGE N STER ASSOCIA , (here:._ fter �, ssociatiori) a non-profit corporation organized and existing under and by the virtue of the laws of the State of North Carolina, for the purpose, among others, of handling the property, affairs and business of the Development; of operating, maintaining, re -constructing and repairing the common elements of :he lands and improvements subject to unit ownership, including the Disposal System; and of collecting dues and ass-ssrnents to provide funds for such operation, maintenance, re -construction and repair. 6. The COMMISSION desires to assure that the Disposal System of the Development is properly constructei., maintained and operated in accordance with law and permit provisions in order to protect the quality of the waters of the State and the public interest therein. NOW, THEREFORE, in consideration of the promises and the benefits to be derived by each of the parJes hereto, the COMMISSION and DEVELOPER do hereby mutually agree as follows: 1. The DEVELOPER shall 1onstruct the Disposal System in accordance with the permit and plans and specifications hereafter issued and approved by the COMMISSION; and shall thereafter properly operate and maintain such systems and facilities in accordance with applicable permit provisions and law. 2. The DEVELOPER shall not transfer ownership and/or control of the Disposal System to the Association until construction has been completed in accordance with the permit and approved plans, and the staff of the Division of Environmental Management has inspected and approved of the facilities. In order to change the name of the permit holder, the DEVELOPER roust request that the permit be reissued to the Association. The request must include a copy of the Association Bylaws and De;claratdon. 3. The DEVELOPER shall not transfer, convey, assign or otherwise relinquish or release its responsibility for the operation and maintenance of its Disposal System until a permit has been reissued to the DEVELOPER"s successor. 1,400 copies of this document were printed at a cost of $40.46, or S0.029 per copy. 4. The DEVELUYhtt stiall provrae in trie Ueclarauon ana Association rsyiaws that me 1nspUsal 6yZ�X.11 anu appurtenances thereto are part of the common elements and shall thereafter be properly maintained and - , , operated inconformity with law and the provisions of the permit for construction, operation, repair, and ' maintenance of the system and facilities. The Declaration and Bylaws shall identify the entire wastewater treatment, collection and disposal system as a common element which will receive the highest priority for . expenditures by the Association except for Federal, State and local takes, and insurance. f S. The DEVELOPER shall provide in the Declaration and Association Bylaws that the Disposal System will maintained out of the common expenses. In order to assure that there shall be funds readily available to repair, maintain or construct the Disposal System, beyond the routine operation and maintenance expenses, the Declaration and Association Bylaws shall provide that a fund be created out of the common expenses. Such fund shall be !�s .arate from the routine maintenance allocated for the facility and shall be part of the yearly budget. 6. In the event the common expense allocation and separate fund are not adequate for the construction, repair, and m datenance or the Disposal System, the Declaration and Association Bylaws shall provide for special assessments to cover such necessary costs. There shall be no limit on the amount of such assessments, and the Declaration and, Bylaws shall provide that such special assessments can be made as necessary at any time. 7. - If a wastewater collection system and wastewater treatment and�or disposal facility provided by any city, town, village, county, water and sewer aLthorities, or other unit of government shall hereinafter become available to serve the Development, the DEVELOPER shall take such action as is necessary to cause the existing and future wastewater of the Development to be accepted and discharged into said governmental system; and shall convey or transfer as much of the Disposal System, and such necessary easements as the governmental unit may require as condidon of accepting the Development's wastewater. Recognizing that it would be contrary to the public interest and to the public health, safety arti welfare for the Association to enter into voluntary disEolution without having made adequate provision for the continued proper maintenance, repair and operation of its Disposal System, the DEVELOPER shall provide in the Association Bylaws that the Association shall not enter into voluntary dissolution without first having transferred its said system and facilities to some person, corporation or Other r,ntity acceptable to and approved by the COMMISSION by the issuance of a permit. 9. The agreements set forth in numbered paragraphs 1, 2, 3, 4, 5, 6, 7, and S above shall be conditions of any permit issued by the COMMISSION to the DEVELOPER for the construction, maintenance, repair and operation of the Disposal System. 10. A copy of this agreement shall be filed at the Register of Deeds in the County(ies) where the Declaration is filed and in the offices of the Secretary of State. of North Carolina with the Articles of Incorporation of the Association. IN WITNESS WHEREOF, this agreement was executr-,i in duplicate originals by the duly authorized representarive of the parties hertto on the day and year •written as indicated by each of the parties narned below: FOR THE ENVIRONMENTAL MANAGEMENT COMMISSION L_ n)� 4C� A. Preston H ' ard, Jr., P.E. Director Division of nmental Management (Date) OCEAN RIDGE FARMS, INC. Name of veloper/Company Sign t EDWARD M. GORE, SR., PRESID= Print Name and Title (Date) 2 RATING SCALE FOR CLASSIFICATION OF WATER POLLUTION CONTROL SYSTEMS Name of Facility: ��'i✓ nl %1 i7� r P,P, to t�( Owner or Contact Person: C Mailing Address: -3.,7 = si Zi ,- f6 5' County: R L4 t�,t S Telephone: Ft b 2- 7 7 Zr Present Classification:L New Facility Existing Facility NPDES Per. No. NC00 Nondisc. Per. No.WQ / — Health Dept.Per No. Rated by: _ S:1r=GIL Telephone: Date: Reviewed by: Heaith Dept, Telephone: Regional Office Telephone: Central Office Telephone: ORC: Grade. Telephone: Check C€assification(s): Subsurface t'/ Spirrigatlon Land Application Wastewater Classification: (Circle One) I II 111 IV Total Points: `i! •��t � : t< l � 1 I: : Iu �lI r�i ■ � : ��.. �i i� �l ;4 � � 1� :.►'► Imo.. ��.,� � 1. �►'. �i JIB i.l.. SUBSURFACE CLASStFICAT10N (check all units that apply) I._septic tanks 2. pump tanks 3. siphon or pump -dosing systems 4. sand filters 5. grease traplinterceptor 6. oil/water separators 7. gravity subsurface treatment and disposal: a. pressure subsurface treatment and disposal: SPRAY IRRIGATION CLASSIFICATION (check all units that apply) I. -preliminary treatment (definition no. 32 ) 2. lagoons 3. septic tanks 4. pump tanks 5, pumps 6. sand filters 7. grease trapinterceptor 8. oil/water separators 9. disinfection 10. chemical add0ion for nutrient/algae control II. spray irrigation of wastewater In addition to the above classifications, pretreatment of wastewater In excess of these components shFll be rated using the point rating system and will require , an operator with an appropriate dual certification. LAND APPLICATION/RESIDUALS CLASSIFICATION (Applies only to permit holder) 1. Land application of biosolids, residuals or contaminated soils on a designated site. WASTEWATER TREATMHYT FACILITY CLASSIFICATION The following systems shall be assigned a Class I classification, unless the flow is of a significant quantity or the technology is unusually complex, to require consideralion by the Commission on a case -by -case basis: (Check if Appropriate) t. OiUwaler Separator Systems consisting only of physical separation, pumps and disposal; 2. Septic Tank)Sand Fifter Systems consisting only of septic tanks, dosing apparatus, pumps,sand filters, disinfection and direct discharge; 3. Lagoon Systems consisting only of preliminary treatment, lagoons, pumps, disinfection, necessary chemical treatment for algae or nutrient control, and direct discharge; 4. Closed400p Recycle Systems; 5. Groundwater Remediation Systems consisting only of oil/water separators, pumps, air -stripping, carbon adsorption, disinfection and disposal; 6. Aquaculture operations with discharge to surface waters; 7. Water Plant sludge handling and back -wash water treatment; 8. Seafood processing consisting of screening and disposal. 9. Single-family discharging systems, with the exception of Aerobic Treatment Units, will be classified if permitted afler July 1, 1993 or ff upon inspection by the Division, it is found that the system is not being adequately operated or maintained. Such systems will be notified of the classification or reclassification by the Commission, in writing. The following scale is used for rating wastewater treatment facilities: (circle appropriate pointa) ' REM POINTS ( 1) Industrial` Pretreatment Units or Industria€ Pretreatment Program (sea definition No. 33)...................................................4 (2) DESIGN I LOW OF PLANT IN gpd [not applicable to norl-contaminaled cooling wafers, sludge handling facilities for water purification plants, total€y closed cycle systems(see definition No. 11), and facilities consisting only of hem (4)(d) Or Items (4)(d) and (11)(d)] 0 - 20,000................................................................................................................................................1 20,001 . 50,000 ......................................................................................................................................2 50.001 - iQ0,000....................................................................................................................................3 100,001 - 250,000...................................................................................................................................4 250,001 - 500,000................................................................................................................................0 500,001 - 1,000,000...............................................................................................................................8 1,000,001 - 2.000,000...........................................................................................................................10 2.000,001 (and up) rate 1 point additional for each 200,000 gpd capacity up to a maximum of .................30 Design Flow (gpdy (3) PRELIMINARY UNiTS/PROCESSES (see definition No.32) (a) SwScreens ........................ or (b) Mechanical Screens, Static Screens or Comminuting Devices..........................................................................2 (c) Grit Removai................................................................................:.............................................................1 or (d) Mechanical or Aerated Grit Removal.............................................................................................................2 (e) Flow Measuring Device................................................................................................................................1 (1) Or Instrumented Flow Measurement.............................................................................................................. (g) Preaeratlon.......... ........................................... :.............. .... .................................................................... (h) Influent Flow Equalization........................................................................................................................ .2) (I) Grease or Oil Separators - Gravity_ ................ ...................... ....... ................ . . ..................... .................... 2 Mechanical.. .... . ................................................................ 3 DissolvedAir FlotalIan............................................................................................................................... 8 O) Prechlorinatlon..........................................................................................................................................5 (4) PRIMARY TREATMENT LNtrS(PROCESSES (a) Septic Tank (sea definition No. 43)..........................................................................................:.................2 (b) imhoff Tank..............................................................................................................................................5 (c) Primary Clarifiers.........................................................................................................................................5 (d) Settling Ponds or Settling Tanks for Inorganic Non -toxic Materials (sludge handling facilities for water purification plants, sand, gravel, stone, and other mining operations except recreational activities such as gem orgold mining)........................................................................................................................................2 (5) SECCNOARY TREATME ?, T LiVnWROCESSES (a) Carbonaceous Stage {i) Aeratlon-High Purity Oxygen System............................................................................. DiffusedAir System......................................................................... ............................ 195, Mechanicaf Air System (fixed, flcating or rotor).._.............................................................. 3 Separate Sludge ReaeralIon............................................................................................3 (fl} Trickling Filter HighRate............................................................. ..........7 StandardRate................................................................:..............................................3 PackedTower................................................................................................................5 (ill) Biological Aerated Fitter or Aerated Biological Fiher............................................................10 (€v) Aerated Lagoons..........................................................................................................10 (v) Rotating Biological Contactors......................................................................................10 (vi} Sand Filters -Intermittent biological..................................................................................2 Recirculating biologlcM.....................................................................................................3 (v11) Stabilization Lagoons.................................................................................................... 9 (vlii) Clarifier......................................................................................................................... (Ix) Singie stage system for combined carbonacaous removal of SOD and nitrogenous removal by nitrification (sea definition No. 12)(Points for this ham have to be in addition to hams (5)(a)(1) through (5)(a)(viil), utilizing the extended aeration process (see deflnhlon No.3a).........................................(2 r utilizing other than the extended aeration process............................................................ (x) Nutrient add'hions to enhance 800 removal......................................................................5 (x1) Biological Culture ('Super Bugs')addition........................................................................5 (b) Nitrogenous Stage (I} Aeration - High Purity Oxygen System.............................................................................20 DiffusedAir System............................_..........................................................................1 0 Mechanical Air System (fixed, floating or rolor).... ............................................. ................ I Separate Sludge Reaeration.............................................................................................3 (li) Trickling Fitter -High Rate...................................................................................................7 StandardRate...............................................................................................................5 PackedTower................................................................................................................5 (iii) Biological Aerated Fiffer or Aerated Biological Filter.............................................................1 0 (iv) Rotating Biological Contactors ........... ............... •................................... ........................ 10 (v) Sand Fitter - Intermittent biological...................................................................................2 Recirculating biological.....................................................................................................3 (VI) Claffiier...........................................................................................................................5 (6) TERTIARY ORADVANCED TREATMENT LN;7S+PROCESSES (a) Activated Carbon Bads . without carbon regeneration...................................................................................................Fa withcarbon regeneration...... ............................................... __ ...................................... . ...... 15 (b) Powdarad or Granular Activated Carbon Feed - without carbon rageneratfon.................................................................................................5 -with carbon reganerafton.....................................................................................................1 5 (c) Air stripping..............................................................................................................................................5 (d) Denhrificatlon Process, .............. ............................................... .... __ ............................................ ........ 10 (0) Electrodlalysis.......................................................... - .5 ................................................................................. . (1) Foam Separation........................................................................................................................................5 (g) ton Exchange................................................................._.........................................................................5 (h) Land Application of Treated Effluent (see dotrnitlon NO. 22b) (not applicable for sand, gravel, stone and other similar mining operations) by high rate Infiltration ..........................................................................4 (I) Mlcroscreens.............................................................................................................................................5 i11 Phosphorous Removal by Biological Processes (See deRnttlon No. 26).........................................................20 (k) Polishing Ponds - without aeration............................................................................................................2 Withaeration.................................................................................................................4 (1) Post Aeration - cascade..............................................................................................................................0 diffused or mechanical.........................................................................................................2 (m) Reverse Osmosis.........................................................................................................................................5 (n) Sand or Mixed -Media Filters - low rate...........................................................---.................................... high rate................................................................... . tf (a) Treatment processes for removal of metal or cyanide...................................................................................1 5 (p) treatment processes for removal of toxic materiels other than metal or cyanide..............................................1 5 (7) SLUCG E TREATMENT (a) Sludge Digestion Tank - Heated (anaerobic)...............................................................................................10 Aerobic................... .................. ................. ........................ ................................... ....................... - CaD Unheated(anaerobic), .......... _ .......... ....................... .... _ ......... .......................................................... 3 (b) Sludge Stabilization (chemical or thermal) ........................... ....................................................... .............. J 5� (c) Sludge Drying Beds - Gravity......................................................................................................................2 VacuumAssisted......................................................................................................................................5 (d) Sludge E1uirlation......................................................................................................................................5 (e) Sludge Conditioner (chemical or ihermal).....................................................................................................5 (f ) Sludge Thickener (gravity)..........................................................................................................................5 (g) Dissolved Air Flotation Unit (not applicable to a unit rated as(3)(i))............................... .............................. a (h) Sludge Gas Utilization (including gas storage).............................................................................................2 (I) Sludge) Holding Tank - Aerated...................................................................................................................5 Nor-aerated.............................................................................................................................................2 ()) Sludge Incinerator (not Including activated carbon regeneration).. .............................................................. 10 (k) Vacuum Filter, Centrifuge, or Fitter Press or other similar dewalering devices...................................................1 0 { 8 } RESIDUALS UTILIZATION/DfSPOSAL (inducting incinerated ash) (a) Lagoons..................................................................................................................................................2 (b) Land Application (surface and subsurface) (see definition 22a) by contracting to a land application operator or landfill operator who holds the land application permit orlandfill permit......................................................................................................................................C} (c) Dedicated Landfill(burial) by the permittee of the wastewater treatment facility...............................................5 (a) Chlorination..............................................................................................................................................5 (b) Dechlodnation...........................................................................................................................................5 (c) Ozone...................................................................................................................................................... (d) Radiation................................................................................................................ ............. I ................ -5 (1 0) CHEMICAL ADDITION SYSTEM(S) ( see definition No. 9) [not appilcable to chemical additions rated as Item (3 @' (5)(a)(xi), (6)(a), (6)(b), (7)(b), (7)(0). (9a), (9)(b) or (9)(c) 5 points each; List....................................................................................................................................5 .................................................................................................. ........ 5 ...........................................................................................................................I........5 ........................................................................................................ .5 (1 1) MISCELLANEOUS UN[TS/PROCESSES (a) Holding Ponds, Holding Tanks or Settling Ponds for Organic or Toxic Materials Including wastes from mining operations containing nitrogen or phosphorus compounds in amounts signiflcanily greater than Is common fordomestic wastewater........................................................... ................................................................. 4 (b) Effluent Flow Equalization (not applicable to storage basins which are inherent In land application systems) ...... 2 (c) Stage Discharge (not applicable to storage basins Inherent In land application systems) .............................. — (d) Pumps........................................................................................................................ --.... (6) Stand -By Power Supply............................................................. (1) Thermal Pollution Control Device.................................................................................................................3 TOTAL POINTS... ............................................ ­ ....... I .............. — CLASSIFICATION -6-4/ ClassI...........................................................................................................5-25 Points ClassII.........................................................................................................26.50 Points classIII ... ...... ........ ......................................... ................. .......... ................... 51-65 Paints ClassN.............................. ......................................................................... 66-Up Points Facilities having a rating of one through four points, Inclusive, do not require a certified operator. Facilities having an activalod sludge procoss will be assigned a minimum ctassifcation of Class 11. Facilities having treatment processes for the removal of metal or cyanide will be assigned a minimum classiflcatfon of Class 11. Facilities having treatment processes for the biological removal of phosphorus will be assigned a minimum classification of Class III. .0004 DEFINITIONS The following defirthlons shall apply throughout this Subchapter. (1) Activated Carbon Beds. A physlcal/chemica[ method for reducing soluble organic material from wastewater effluent; The column -type beds used In this method wifl have a flaw rate varying from two to eight gallons per minute per square foot and may be either upflow or downtlow carbon beds, Carbon may or may not be regenerated on the wastewater treatment plant site; (2) Aerated Lagoons. A basin in which all solids are maintained In suspension and by wh;ch biological oxidation or organic matter Is reduced through artificially accelerated transfer of oxygen on a ifow-through basis; (3) Aeration. A process of bringing about Intimate contact between air or high purity oxygen in a liquid by spraying, agitation or dlffuslon;(3a) Extended Aeration. An activated sludge process utilizing a minimum hydraulic detention time of 18 hours. (4) Agdcufturally managed site, Any site on which a crop Is produced, managed, and harvested (Crop Includes grasses, grains, trees, etc.); (5) Air Stripptng. A process by which the ammonium ion Is first converted to dissolved ammonia (pH adjustment) with the ammonia then released to the atmosphere by physical means; or other similar processes which remove petroleum products such as benzene, toluene, and xylene; (6) Carbon Reganeratiom The regeneratlon of exhausted carbon by the use of a furnace to provide extremely high temperatures which volatilize and oxidize tt'a absorbed Impurities; (7) Carbonaceous Stage. A stage of wastewater treatment designed to achieve 'secondary' effluent limits; (8) Centrfuge. A mechanical device In which centrifugal force Is used to separate solids from liquids or to separate liquids of different dens",fas; (9) Chemical Addition Systems- The addition o1 chemical(s) to wastewater at an application point for purposes of improving solids removal, pH adjustment, alkalinity control, etc.; the capability to experiment with differem chemicals and different application points to achieve a specific result will be considered one system-, the capability to add chamical(s) to dual units will be rated as one system; capability to add a chemical at a different appllcation'points for different purposes will result In the systems being rated as separate systems; (10) Chemical Sludge CondliloNng. The addition of a chemical compound such as Ilme, farrlc chloride, or a polymer to wet sludge to coalesce the mass prior to its application to a dewatering device; (11) Closed Cycle Systems Use of holding ponds or holding tanks for containment of wastewater containing Inorganic, non -toxic materials from sand, gravel, crushed stone or other similar operations. Such systems shall carry a maximum of two points regardless of pumping iacilitles or any other appurtenances; (12) Combined Removal of Carbonaceous BOD and Nitrogenous Removal by Nitrification- A single stage system required to achieve permit etfluenf limits on 8OC and ammonia nitrogen within the same biological reactor, (13) Dechlorinallon. The partial or complete reduction of residual chlorine In a liquld by any chemical or physical process; (14) Denitriiicatlon Process. The conversion of nitrate -nitrogen to nitrogen gas; (15) Electrodlaiysis. Process for removing Ionized salts from water through She use of ion -selective Ion -exchange membranes; (16) Filter Press. A process operated mechanically for partially dewatering sludge; (17) Foam Separation. The planned frothing of wastewater or wastewater effluent as a means of removing excessive amounts of datergent materials through the introduction of air in the form of tine bubbles; also called foam fractionation; (18) Grit Removal. The process of removing grit and other heavy mineral matter from wastewater; (19) Imhoff Tank. A deep two story wastewater lank consisting of an upper sedimentation chamber and a Sower sludge digestion chamber. (20) Instrumented Flow Measurement, A device which Indicates and records rate of flow; (21) Ion Exchange. A chemical process in which ions Irom two different morecules are exchanged; (22) Land application. (a) Sludge Disposal. A final sludge disposal method by which wet sludge may be applied to land either by spraying on the surface or by subsurface injection (i.e.. chisel plow); (not applicable for types of sludge described In (11) of this Rula); (b) Treated Effluent. The process of spraying treated wastewater onto a land area or other methods of application of wastewater onto a land area as a means of final disposal or treatment; (23) Microscreen. A low speed, continuously back -washed, rotating drum fitter operating under gravity conditions as a polishing method for removing suspended solids from allluerii; (24) Nitrification Process. The biochemical conversion of unoxldized nitrogen (ammonia and organic nitrogen) to oxidized nitrogen (usually nitrate); (25) Nitrogenous Stage. A separate stage of wastewater treatment designed for the specific purpose of converting ammonia nitrogen to nitrate nitrogen; (26) Phosphate Hemnval, Biological. The removal of phosphorus from wastewater by an oxic/anoxic process designed to enhance luxury uptake of phosphorus by the microorganisms; (27) Polishing Pond. A holding pond fallowing secondary treatment with sufficient detention time to allow settling of finely suspended solids; (28) Post Aeration. Aeration following conventional secondary treatment units to increase effluent D.O. or for any other purpose; (29) Post Aeration. (Cascade) A polishing method by which dissolved oxygen is added to the offluerd by a nonmechanicai, gravity means of flowing dawn a series of steps or weirs; The flow occurring across the steps or weirs moves in a fairly thin layer and the operation of the cascade requires no operator adjustment; thus, zero points are assigned even though this Is an essential step to meeting the limits of the discharge permit; (3C) Powdered to Granular Activated Carbon Feed. A biophysical carbon process that utilizes biological activity and organic absorption by using powdered or granular activated carbon; Virgin or regenerated carbon is feed controlled into the system; (31) Preaeration. A tank constructed to provide aeration prior to primary treatment; (32) Preliminary Units. Unit operations in the treatment process, such as screening and comminution, that prepare the liquor for subsequent major operations; (33) Industrial Pretreatment. (a) Pro -treatment Unit, Industrial. The conditioning of a waste at its source before discharge, to remove or to neutralize substances in)udous to sewers and treatment processes or to effect a partial reduction in load on the treatment process which is operated by the same governing body as the wastewater traaimant plant being rated; b) Pre-treatment Program, Industrial - must be a State or EPA required program to receive points on the rating shoot; (34) Primary Clarifiers. The first settling tanks through which wastewater is passed In a treatment works for the purpose of removing settleable and suspended solids and BCD which Is associated with the solids; (35) Pumps. All influent, effluent and in -plant pumps; (36) Radiation, Disinfection or steriifzation process utilizing devices emitting uftravfolet or gamma rays; (37) Reverse Osmosis- A treatment process in which a heavy contaminated liquid is pressurized through a membrane forming nearly pure liquid free from suspended solids; (38) Rotating Biological Contractors. A fixed biological growth process in which wastewater flows through tanks in which a series of partially submerged circular surfaces are rotated; (39) Sand Filters: (a) Intermittent Biological. Filtration of effluent following septic tanks, lagoons, or some other treatment process In which further biodecompositlon is expected to produce desired etfluents; Hydraulic loading rates on these filters are computed in gpd/ac and have a resulting law gpm/st (less than one); b) Recirculating biological - the same type of sand filter as defined in Subparagraph (39) (a) of this Rule with the added oapabilily to recycle effluent back through the sand filter; (40) Sand or Mixed -Media Fitters. A polishing process by which effluent limits are achieved through a further reduction of suspended solids; (a) low rate •- gravity, hydraulically loaded fltter with loading rates In the one to three gpnvsf range; (b) high rate -- a pressure, hydraulically loaded filler with loading rates in the five gpm/sf range; At any rate, the loading rate will exceed three gprrvsf; (41) Secondary Clarifiers- A tank which follows the biological unit of treatment plant and which has the purpose of removing sludges associated with the biological treatment units; (42) Saparate Sludge Reaeration. A part of the contact stabillzation process where the activated sludge Is transferred to a tank and aerated before returning it to the contact basin; (43) Septic Tank, A single -story settling tank in which settled sludge is in contact with the wastewater flowing through the tank; shall not be applicable for septic tank systems serving single family residences having capacity of 2.000 gallons or less which discharge to a nitrification field; (44) Sludge Digestion. The process by which organic or volatile matter and sludge is gasified, I)quefied, mineralized or convened into more stable organic mailer through the activity of living organisms, which Includes aerated holding tanks; (45) Sludge Drying Beds. An area comprising natural or arlfSfcial layers of porous materials upon which digested sewage sludge is dried by drainage and evaporation- (46) Sludge Eluldation. A process of sludge conditioning In which certain constituents are removed by successive washings with fresh water or plant effluent; (47) Sludge Gas Uilization. The process of using sewage gas for the purpose of heating buildings, driving engines, etc.; (48) Sludga Holding Tank (Aerated and Nonaerated). A tank utilized for small wastewater treatment plants not containing a digester In which sludge may be kept fresh, and supernatant withdrawn prior to a drying method (i.e. sludge drying beds); This may be done by adding a small amount of air simply to keep the sludge fresh, but not necessarily an amount that would be required to achieve stabilization of organic matter. A nonaerated tank would simply be used to decant sludge prior to dewatering and would not allow long periods (several days of detention) without resulting odor problems; (49) Sludge Incinerators. A furnace designed to bum sludge and to remove all moisture and combustible materials and reduce the sludge to a sterile ash; (50) Sludge Stabilization (Chemical or Thermal). A process to make treated sludge less odorous and putrescble, and to reduce the pathogenic organism co,.nlant; This may be done by pH adjustment, chlorine dosing, or by heat treatment; (5 1 ) Sludge Thickener. A type of sedimentation tank In which the sludge is permitted to settle and thicken through agitation and gravity; (52) Stabilization Lagoon. A type of oxidation lagoon in which biological oxidation of organic matter Is effected by nalurai transfer of oxygen to the water from air (not a polishing pond); (53) Stand -By Power Supply. On site or portable electrical generating equipment; {54) Static Screens. A stationary screen designed to remove solids, including non-bfodegradabia particulate (floatable solids, suspended solids and BOD reduction) from municipal and industrial wastewater treatment systems; (55) Tortfary Treatment. A stage of treatment following secondary which is primarily for the purpose of effluent polishing; A settling lagoon or sand or coal filter might be employed for this purpose; (56) Thermal Pollution Control Device. A device providing for the transfer of haal from a fluid flowing In tubes to another fluid outside the tubes, or vice versa; or other meads of regulating liquid temperatures; (57) Thermal Sludge Conditioner. A conditioning process by which heat Is added for a protracted period of time to Improve the dowaterabiMy of sludge by the sclubilizing and hydraultzing of the smaller and more highly hydrated sludge particles; (58) Toxic Materials. Those wastes of c.,omblrallorLs of wastes, Including disease -causing agents which after discharge and upon exposure, Ingestion, Inhalation or assimilation into arty organism, either directly from the environment or Indirectly by ingestion through food chains, will cause death, disease, behavioral abnormalities, cancer, genetic mutations, physiological malfunctions (including malunctions in reproduction) or physical deformations, in such organisms or their offspring; Toxic materials Include, by way of Illustration and not limitation: lead, cadmium, chromlum, mercury, vanadium, arsenic, zlnc, or1ho-n)1ro-chlorobenzene (C)NCB), polychlodnated biphenyis (PCBs) and dlchlorodiphenyi irichloroethane (DDT); and any other materials that have or may hereafter be determined to hal. toxic properties; (59) Trickling Filler. A biological treatment unit consisting of a material such as broken stone or rock over which wastewater is distributed; A high rate trickling filter is one which operated at between 10 and 30 mgd par acre. A low rate trickling filter Is one which is designed to operate at one to lour mgd per acre; (60) Trickling Fitter (Packed Tower). A plug flow type of operatlon In which wastewater flows down through successive layers of media or filtrate material; Organic matortal is removed continually by the active biological fixed growth In each successive layer. This method may produce 'secondary' quality effluent, or may be adapted to produce a ril"led effluent; (61) Vacuum Fitter, Conlrifuges, or Fitter Presses. Devices which are designed to remove excess water from either digested or undigested sludge prior to dispo: al or further treatment.