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HomeMy WebLinkAboutWQ0005842_Final Permit_19920331State of North Carolina Department of Environment, Health and Natural Resources Division of Environmental Management 512 North Salisbury Street - Raleigh, North Carolina 27626-0535 James G. Martin, Governor William W. Cobey, Jr., Secretary Mr. Tom L. Davis, Superintendent Carteret County Board of Education Post Office Drawer 600 Beaufort, North Carolina 28516 Dear Mr. Davis: George T. Everett, Ph.D Director March 31, 1992 Subject: Permit No. WQ0005842 Carteret County Schools West Carteret High School and Morehead Elementary School Subsurface Disposal System Carteret County In accordance with your application received November 19, 1991 we are forwarding herewith Permit No. WQ0005842 dated March 31, 1992 to Carteret County Board of Education for the construction and operation of a 35,400 GPD low pressure pipe subsurface wastewater disposal system. This permit shall be effective from the date of issuance until March 31, 1997 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 limitations contained in this permit are unacceptable to you, 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, P.O. Drawer 27447, Raleigh, NC 27611-7447. Unless such demands are made this permit shall be final and binding. Regional Offices Asheville Fayetteville Mooresville Raleigh Washington Wilmington Winston-Salem 704/251-6208 919/486-1541 704/663-1699 919/571-4700 919/946-6481 91.91395-3900 919/896-7007 Pollution Prevention Pays P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone 919-733-7015 An Equal Opportunity Aff=ative Action Employer One set of approved plans and specifications is being forwarded to you. If you need additional information concerning this matter, please contact Mr. John Seymour at 919/ 733-5083. Sincerely, oaj"-"'�o ' George T verett cc: Carteret County Health Department Wilmington Regional Office, Water Quality Wilmington Regional Office, Groundwater Groundwater Section, Jack Floyd Training and Certification Unit Stroud Engineering, P.A, Facilities Assessment Unit NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION DEPARTMENT OF ENVIRONMENT, HEALTH AND NATURAL RESOURCES RALEIGH SUBSURFACE DISPOSAL 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 Carteret County Board of Education Carteret County `ai7;7�I1:t� construction and operation of a 35,400 GPD subsurface wastewater disposal system consisting of approximately 650 linear feet of 8 inch gravity sewer, a dual pump 260 GPM pump station with high water alarms and 3,560 feet of 6 inch force main to serve Morehead Elementary School; a dual pump 220 GPM influent pump station with high water alarms and 60 feet of 4 inch force main (receiving flow from Morehead Elementary School and the existing gravity system flow from West Carteret High School), new influent inlet screen with screenings catch trough, an aerated 20,000 gallon surge tank with existing dual 45 CFM blowers and new dual 40 GPM surge pumps with new surge control box (converted from existing package treatment plant); a new two way splitter box, two new parallel package treatment plants each with an 18,000 gallon aeration basin, and dual 1,500 gallon hopper clarifiers; three 90 CFM blowers (to serve both plants), a 6,500 gallon aerated sludge digester tank (converted from the existing surge tank), an existing dosing tank, two existing 64 foot by 34 foot surface sand filters to be renovated, a 1,300 gallon baffled stilling tank with a flow recorder (converted from the existing chlorine contact tank), a new 100 kw emergency generator, a new dual pump 50 GPM pump station with high water alarms and 770 feet of 2 inch force main, a 2,285 gallon dosing tank with four 550 GPM dosing pumps and high water alarms, eight 140 foot by 80 foot low pressure pipe subfields totaling 89,600 square feet (each field having thirty-two, 70 foot long, 11/4 inch distribution laterals), and all associated piping, valves, controls, equipment and appurtenances to serve West Carteret High School and Morehead Elementary School with no discharge of wastes to the surface waters, pursuant to the application received November 19, 1991 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 March 31, 1997 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. Mail the Certification to the Permits and Engineering Unit, P.O. Box 29535, Raleigh, NC 27626-0535. 2. The Wilmington Regional Office, phone no. 919/ 395-3900 shall be notified at least forty- eight (48) hours in advance of backfilling 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. In the event that the facilities fail to perform satisfactorily, including the creation of nuisance conditions, the Permittee shall take immediate corrective action, including those as may be required by this Division, such as construction of additional or replacement wastewater treatment or 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. This permit shall become voidable if the soils fail to adequately absorb the wastes and may be rescinded unless the facilities are installed, maintained, and operated in a manner which will protect the assigned water quality standards of the surface waters and ground waters. 6. Adequate measures shall be taken to divert stormwater from the disposal area and prevent wastewater runoff from the subsurface disposal field. 7. The sludge generated from these treatment facilities must be disposed of in accordance with General Statute 143-215.1 and in a manner approved by the North Carolina Division of Environmental Management. 8. A usable green area shall be maintained for wastewater disposal. The green area shall have the capability of accommodating the average daily flow of the facility being served without exceeding the loading rates of the green area. A "green area" as defined in 15 NCAC 2H .0404(g)(7) is an area suitable for waste disposal, either in its natural state or which has been modified by planting a vegetative cover of grasses or low growing shrubbery. 9. Diversion or bypassing of the untreated wastewater from the treatment facilities is prohibited. 10. The following buffers shall be maintained: a) 100 feet between disposal area and any public or private water supply including wells b) 100 feet between disposal area and "SA and SB" classified surface waters C) 50 feet between disposal area and any stream, lake, river or natural drainageway d) 50 feet between disposal area and property lines e) 10 feet between disposal area and surface water interceptor drains or diversions (upslope) f) 25 feet between disposal area and surface water interceptor drains or diversions (downslope) and groundwater drainage systems. 1. The facilities shall be properly maintained and operated at all times. 0] 2. Upon classification of the facility by the Certification Commission, 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 Certification Commission. The Permittee must also employ a certified back-up operator of the appropriate type and grade to comply with the conditions of Title 15A, Chapter 8A, .0202. The ORC of the facility must visit each Class I facility at least weekly and each Class 11,111, 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 Title 15A, Chapter 8A, .0202. Once the facility is classified, the Permittee must submit a letter to the Certification Commission which designates the operator in responsible charge within thirty days after the wastewater treatment facilities are 50% complete. 3. The application rates to the disposal field shall not exceed 0.40 gallons/ day/ square foot. 4. 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. 5. No traffic or equipment shall be allowed on the disposal area except while installation occurs or while normal maintenance is being performed. 6. A suitable cover shall be maintained on the LPP field(s) and the field(s) shall be routinely mowed. The clippings shall be periodically removed to prevent the build-up of thatch. 7. The screenings removed from the wastewater treatment plant shall be properly disposed of in a sanitary landfill. 8. An automatically activated standby power supply shall be on site and operational at all times. If a generator is employed as the alternate power supply, it shall be tested weekly by interrupting the primary power source. 9. The flow measurement device shall be calibrated annually by a representative of a firm which is routinely engaged in the calibration of flow measurement devices. Records of the calibration, including all information pertinent to the calibration, shall be available during any inspection by Division staff. 10. Diffusers shall be cleaned as needed to assure adequate aeration. Records of maintenance shall be maintained by the permittee. III. MDNITQRING AND REPORTING RE0jJ1R 1. Any monitoring deemed necessary by the Division of Environmental Management to insure surface and ground water protection will be established and an acceptable sampling reporting schedule shall be followed. 3 2. The low pressure lines shall be maintained as necessary (including purging of the lines and pressure testing) in order to ensure that they remain free of obstructing materials and that the pressure head on the laterals remains within the design specifications. The highest and lowest laterals on each subfield shall be checked (and adjusted as necessary) annually to ensure that the pressure heads are within the approved specifications. If adjustments are necessary to the highest and lowest laterals, the remaining laterals in that subfield shall also be checked and adjusted to the approved specifications. Adequate records showing all maintenance shall be maintained by the Permittee. These records should include but are not limited to the following: Items Inspection Frequency a) Individual dosing pump operation Monthly b) Individual field rotation Monthly c) High water alarms Monthly d) Residual pressure on highest and lowest lateral on each subfield Annually 3. As an indicator of proper operation and maintenance, the facility shall produce an effluent in compliance with the following limitations: Parameter Monthly Averagea Daily Maximumb Flow MGD 0.0354 BOD$ 10 mgll 15 mg/1 NH3 as N 4 mg/l 6 mg/1 TSS 20 mg/l 30 mg/1 a Monthly average shall be the arithmetic mean of all samples collected during the reporting period. b Daily maximum shall be the maximum value of all samples collected during the reporting period. The effluent from the subject facilities shall be monitored by the Permittee at the point prior to discharge to the subsurface disposal field for the following parameters: Location of Measurement Sample Parameter _ _ Sampling Points Frequency Tlype BODS, 5 -day, 20C Effluent *2/Month Composite NH3 as N Effluent *2/Month Composite TSS Effluent *2/Month Composite Fecal Coliform Effluent *2/Month Grab Flow Influent or Effluent Continuous Recording Settleable Matter Effluent Daily Grab Residual Chlorine Effluent Daily Grab NO3 Effluent **Triannually Grab TDS Effluent **Triannually Grab TOC Effluent **Triannually Grab Chloride Effluent **Triannually Grab 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. Dunn; remainder of the year, these parameters shall be monitored monthly. 2 ** Triannual sampling frequency shall correspond with triannual monitoring of wells requirec Groundwater monitoring conditions. If Groundwater sampling indicates or predicts problems with the compliance with Groundw Standards, this permit will be modified to include additional and/or more restrictive limitations. 4. Three copies of all operation and maintenance records (as specified in condition III 2) and all effluent monitoring data (as specified in condition III 3) shall be submitted on or before the last day of the following month to the following address: NC Division of Environmental Management Water Quality Section Facility Assessment Unit PO Box 29535 Raleigh, NC 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 residual chlorine, 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 LPP lines were purged and pressures equalized. e. Date of calibration of flow measurement device. f. Date and results of power interruption testing on alternate power supply. 7. Nolgomplianee Notification: The Permittee shall report by telephone to the Wilmington Regional Office, telephone no. 919/ 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 basin or tank; 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 of all or any portion of the influent to such station or facility. 5 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 15 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. 1. Any groundwater quality monitoring as deemed necessary by the Division of Environmental Management shall be provided 2. The hard pan in the LPP field shall be scarified or removed within the distribution trench and the trench backfill should be properly compacted. V. INSPECTION 1. 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 of Environmental Management or other permitting authority. 3. Any duly authorized officer, employee, or representative of the Division of Environmental Management may, upon presentation of credentials, enter and inspect any property, premises or place on or related to the disposal site and 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; or may obtain samples of groundwater, surface water, or leachate. VI. GENERAL CONDITIONS 1. This permit shall become voidable unless the facilities are constructed in accordance with the conditions of this permit, the approved plans, 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 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 of Environmental Management 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. R 4. A set of approved plans and specifications for the subject project must be retained by the applicant for the life of the project. 5. The annual administering and compliance fee must be paid by the Permittee within thirty (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. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to an enforcement action by the Division of Environmental Management in accordance with North Carolina General Statute 143-215.6A to 143-215.6C. 7. The subject wastewater treatment and disposal facilities shall be connected to an operational publicly owned wastewater collection system within 180 days of its availability to the subject facilities, if the subject wastewater treatment or disposal facilities are in noncompliance with the terms and conditions of this non -discharge permit or the governing statutes or regulations. Prior to the initiation of these connection activities, appropriate approval must be received from this Division. 8. 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. 9. 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. Permit issued this the 31st day of March 1992 NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION GLA George T. , erett, Direr Division of nvironmen Management By Authority of the Environmental Mana ement Commission Permit Number WQ0005842 7 Permit No. WQ0005842 March 31, 1992 Engineers 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, Project Name Location for the 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 the approved plans and specifications. Signature Registration No. Date 8 �-x!7 F� ,, 1�'e�i �.�rt_- � _+�= = _ _--�--�J� �� sem_ �"'•, ��. -- *:e °• '� �"'*'- - r - -- _ _ - - -�- - -+:r_. r - 370000 •a !�y'" 5 i.' -{ y= -- F ~ a _ �^- —t- - FEET /\ WEST CARTERET HIGH SCHOOL WWTP s-� NON—DISCHARGE PERMIT NO. WQ0005842 ort % rse ' I. ' QUAD SHEET: MANSFIELD, N. C. 43 V (rail�Iark 1177 er 4 ��� .Y� - - -- • �4 - Z •'� AtA.'4S rC � • 70 Fi. a 1 •• 4•: • ••'VC 5 • ;' .�•. •�• :�� ter, i- 1, 1 01 he•}. •J�. I:,• ••�• moi+ .. • •� —s �• i C r _ • - --_,- �p . �- ' /•• ' •� r 1-b ` �. r _ X44 70 _ r aDaybearnn fNTRACOASTAL apace : ` 0 Daybescon WA rERWAY �c Daybeacono Dolphins ' ' '"43 fl 0 U N D 42'30„ Aisle Pik 2 �pR .� ° .p•' ` � `��..'<'�� - � �R i `„- -ri ter.- ,,� � i � Goff Comae?i1 - - t O ra ra iler `i It i __ •lam I _ - _�^ _ - - -/ i-� _ ?5 _.....�..... �.. .............-.......�... •s Lvnd+ng RATING SCALE FOR CLASSIFICATION OF FACILIT/IES Name of Plant: 6 Owner or Contact Pers:n: �� cA f f? Mailing Address: cJ County: ��,ef Z�C re f Telephone: -� NPDES Permit. No, NC00-3ege Issue Date: Expiration Date:/L/ 13 %j Water Quality Permit t.a.WQ000 LZlssue Date: Expiration Date:-/-/ T Rated By: z6V_51/jTASD� Date: Reviewed By (Regional fTWTPC): Zk Reviewed By (Train & Cert): ORC: Grade: Plant Class (Circle one) I II III IV ITEM PO=':PS (5) SECONDARY TREATMENT UNITS (a) Carbonaceous Stage ;1) Industrial Pretreatment Units and/or 4 Industrial Pretreatment Program (i) Aeration - High Purity oxygen System...... Diffused Air System 00 (See Definition No, 33) .............. Mechanical Air system )fixed, floating, or rotor)..............a (2) DESIGN FLOW OF PLANT IN GPD separate Sludge Reaeration ........ 3 (Not applicable to non -contaminated cooling (ii) Trickling Filter - High Rate ................. waters, sludge handling facilities for water Standard Rate.............5 purification plants, totally closed cycle Packed Tower..............5 systems (definition No. 111, and facilities (iii) Biological Aerated Filter or Aerated consisting only of item (a)(d) or Biological Filter ..........................10 Jtems (4)(d) and (11)(d). (iv) Aerated Lagoons .............................10 (v) Rotating Biological Contactors..............10 0 -- 20,000 ........................... ' _ (vi) Sand Filters - Intermittent'BiolooicE........ 2 20,001 -- 50,000 .................................9 Recirculating Biclogicai...... 3 50,001 -- 100,000 ................ ......... I ...... . 100,001 -- 250,000...... ........ ................. .., (vii) Stabilization Lagoons ........................g (viii) Clarifier ................................... 250,001 -- 500,000 .................................5 (ix) Single stage system for combined 500,001 -- 1,000,000 .................................a carbonaceous removal of BOD and 1,000,001 -- 2,000,000 .................................3 nitrogenous removal by nitrification 2,000,001 (and up) -- Late I point additional fcr each (See definition No. 12) (F.•ints for 100,000 GPD capacity up to a this system are in addition to items maximum3D (5)(a)(i) through (5)(a)(viii)...............8 (of Design Flow (GPD): / p� (x) Nutr_ent Additions To Enhance BCD Removal .... 5 (xi) Bic::gical,Culcure ("Super Bugs") addition (3) PRELIMINARY UNITS (See definition No. 32) to enhance organic compound removal ......... 5 (b) Nitrogeno:a Stage (a) Bar Screens........ .............................. ! (1) Aerz_ion - High Purity Oxygen Syster......... 20 or Diffused Aeration................10 (b) Mechanical Screens, Static Screens or Mechanical Air System (fined, Comminuting Devices................................2 floating, or rotor) .............. 6 or Separate Sludge Reaeraticn........ 3 (c) Grit Removal.......................................1 (ll) Tric:;ling Filter - High Rate ................. 7 or Standard Rate.............5 (d) Mechanical or Aerated Grit Removal.................2 Packed Tower ........... ...5 (e) Flow Measuring Device ................................ (iii) Bio:=gical Aerated Filter or Aerated or (f) Instrumented Flow Measurement ..................... _ Bic_ogical Filter ..........................10 (iv) Rota_ing Biological Contactors .............. 10 (g) Preaeration................................ ...... 2 (v) Sand Filter - Intermittent Biological ......2 (h) Influent Flow Equalization.... ............... Recirculating Biological ....... 3 (i) Oil or Grease Separators -- Gravity ............... (vi) Clarifier .................................... 5 Mechanical.............3 DAF....................3 (6) TERTIARY OR A- ANC£ TREATMENT UNITS (a) Activated Carbon Beds - (4) PRIMARY TREATMENT UNITS Without Carbon Regeneration..............5 (a) Septic flank (See definition No. 43)... .............2 With Carbon Regeneration................15 'b) Imhoff Tank.....................................5 (b) Powdered cr Granulated Activated Carbon Feed - :) Primary Clarifiers... .._ .................5 Without Carbon Regeneration............ .5 ,d) Settling Ponds or Settling Tanks for With Carbon Regeneration................15 Inorganic Nontoxic Materials (sludge (c) Air Stripe''ng.................... .................5 handling facilities for water purification (d) Denitrification Process (Separate Process) ........ 10 plants, sand, gravel, stone, and other such (e) Electrodia;.ysis....................................5 mining operations except recreational (f) Foam Separetion....................................5 activities such a5 gem or gold mining..............2 (g) Ion Exchance....................................... 5 9 2� ,h) Lar." Appl_cation of Treated Effluent (See Defln tion No. 22b) ('lot Applicable For sand, graysl, stone, and tther similar mining operations: (i) On Agriculturally Managed Sites (Ser. Definition No. a) . .........................10 (ii) By Efgh Rate Infiltration On Non - Agriculturally Manaced Sites (Include: Rotary Distributors and Similar Purpc-e Fixer Nozzle Systems; .. ...........4 (iii) By Subsurface Disposal (Includes L. -a Pressure Pipe SystecS and Gravity Systems Except Plants Consisting of Septic Tank and Nitrification Lines Only). (i) Microscreens....................................... 5 (j) Phosphorus Removal By Biological Process (See Definition No. 26) ..........................20 (k) Polishing ?ends - Without Aeration .................2 With Aeration....................5 (1) Post Aeration - Cascade ............... ............0 Diffused or Mechanical.............5 (m) Reverse OEm3sis................................. (n) Sand or V✓ xad Media Filters - Low Raze............ 2 .1 High Rate............ (o) Treatment Process For Remc•:al of Nezal Or Cyanide.. .....................................15 (p) Treatment Process For Remc7al Of Tox-'c Materials other Than Meta'_ or Cyanide ............ 15 (7) SLUDGE TREATMENT 10 (a) Sludge Digestion Tank - Heated ................ 5 Aerobic .................. Unheated.. ...........3 (b) Sludge Stabilization (Cher..'cal or T`.ermal)........ 10 (c) Sludge Drying Beds - Gray^_y....................... vacuo- Assisted ............... 5 (d) SledgeElutriation ................................. (e) Sludge Conditioner (Chemical or Thermal) ...........5 (f) Sludge Thickener (Gravity) ........... ........... {g) Dissolved Air Flotation U. -.-'t (Not Applicable B To A Unit Rated As (3)(i)` .............•••• ...... Sludge Gas Utilization (Ir.-luding Gas Storage)..; Sludge Holding Tank - Aerated ................... Non-aerated.._ ....• Sludge Incinerator (Not ln. luding )kctivated 10 Carbon Regeneration) ....................•••.•" (k) Vacuum Filter, Centrifuge, Filter Press or „ 10 other similar,dewatering devices ............... ($) SLUDGE DISPOSAL (Including Incinerated Ash) (a) Lagoons............ I ..................... .........Z (b) Land Application (Surface and Subsurface) (See Definition No. 22a) Where the -facility holds the land application 10 permit...................................... - By contracting to a land application operator who holds the land application �^ permit ....................................... 2 Land application of sludge by a contractor who does not hold the permit for the ilit where the sludge (11) MISCELLANEOUS UNITS (a) Holding Ponds, Holding Tanks, or Settling Ponds For Organic or Toxic Materials Including Wastes From brining Cperations Containing Nitrogen and/or Phosphorus Compounds in Amounts Significantly Greater Than Is Common for Domestic Wastewater).............4 (b) Effluent Flow Equalization {Nz.t Applicable To Storage Basins Inherent To :and Application Systems).... ....................2 (c) Stage Discharge (Not Applicable To Storage (d) Basins Inherent To Land Application Systems). Pumps ............................................ (e) Standby Power Supply ..... ........................ (f) Thermal Pollution Control Devi:e...................3 TOTAL POINTS1 CLASSIFICATION Class I ......................5 - 25 Points lassI . .............. . .....26 - 50 Points TI -ass I 1 ............... .....51 - 65 Points Class IV........................66 - up Points Facilities having a rating of cne through four points, inclusive, do not require a certified oterator. Classification of all other facilities requires a comparable grade operator in responsible charge. Facilities hev'.ng an activated sludge process will be assigned a minimum classification of Cless 1I. Facilities haling treatment processes for the removal of metal or cyanide w,11 be assigned a minimum classification of Class II. Facilities having treatment processes for the biological removal of phosphc.-us will be assigned a minimum classification of Class III. rv, 4 !� 5S wastewater treatment Lac y 10 is generated..... ............................. . (c) Landfill (Burial) -.4 ........ 5 (9) DISINFECTION (a) Chlorination ............................... (b) Dechlorination .................I......_...: 5 T ` (c) ozone ..................................... 5 (d) Radiation.. ................................. 10) CHEMICAL ADDITION SYSTEMS) (See Definition No. 9) (Not Applicable to Chemical Additions Rated As Item (6)(a)' ((b), (7)(e), (9){b}, or (9)(c) 5 points each ................5 .....................5 .....................5 5(9