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HomeMy WebLinkAboutWQ0006822_Final Permit_19930325State of North Carolina Department of Environment, Health and Natural Resources Division of Environmental Management 512 North Salisbury Street • Raleigh, North Carolina 27604 James B. Hunt, Jr., Governor March 25, 1993 Mr. B. L. Brantley, President Jiffy Mart, Incorporated 316 Charlotte Street Rocky Mount, North Carolina 27804 Jonathan B. Howes, Secretary Subject: Permit No. WQ0006822 Jiffy Mart, Incorporated Groundwater Remediation Jiffy Mart - Hines Street Wilson, NC Wilson County Dear Mr. Brantley, In accordance with your application received July 31, 1992, we are forwarding herewith Permit No. WQ0006822, dated March 25, 1993, to Jiffy Mart, Incorporated for the subject groundwater remediation system. This permit shall be effective from the date of issuance until February 28, 1998, 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 919/395-3900 919/761-2351 Pollution Prevention Pays P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone 919-733-7015 An Equal Opportunity Affirmative Action Employer One set of approved plans and specifications is. being forwarded to you. If you need additional information concerning this matter, please contact 1VIs: Angel-a°Y:,Griffin,at 919/ 733-5093. Sincerely, 2 A. Prest Howard, Jr., P.E. Director cc: Wilson County Health Department Raleigh Regional Office, Water Quality Section Raleigh Regional Office, Groundwater Section Jack Floyd, Groundwater Section Bruce D. Reilly, P. E., Edgerton Environmental Services, Inc. Facilities Assessment Unit Training and Certification NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION DEPARTMENT OF ENVIRONMENT, HEALTH AND NATURAL RESOURCES RALEIGH INFILTRATION GALLERY 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 Jiffy Mart, Incorporated Wilson County FOR THE construction and operation of 3,600 GPD groundwater remediation system consisting of a 400 gallon aeration tanks, a 100 gallon equalization tank, two (2) 100 pound granular activated carbon units, a 270 gallon dosing tank and two (2) transfer tanks, two (2) subsurface fields, one (1) 30 feet by 50 feet and one (1) 10 feet by 100 feet, and all necessary pumps, valves and appurtenances to serve Jiffy Mart, Inc., Wilson, NC facility with no discharge to the surface waters, pursuant to the application received July 31, 1992 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 February 28,1998, and shall be subject to the following specified conditions and limitations: I. PERFORMANCE STANDARDS I. 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 and the approved plans and specifications. Mail the Certification to the Permits and Engineering Unit, P.O. Box 29535, Raleigh, NC 27626-0535, 2. The Raleigh Regional Office, telephone number (919) 571-4700, 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. 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. 4. 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 the construction of additional or replacement treatment or disposal facilities. 5. 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. 6. Any 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. 7. Diversion or bypassing of the untreated groundwater from the treatment facilities is prohibited. II. OPERATION AND MAINTENANCE REQUIREMENTS 1. The facilities shall be properly maintained and operated at all times. 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 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 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 5017o complete. 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. III. MONITORIN(I AND REPORTING REQUIREMENTS 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. 2. Noncompliance Notification: The Permittee shall report by telephone to the Raleigh Regional Office, telephone number (919) 571-4700, 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: 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. N 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 is not in 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. IV. GROUNDWATER REQUIREMENTS 2 Groundwater monitoring wells MW-1, MW-2, MW-3, MW-4, MW-5, and MW-6 shall be sampled every March, .Tune, September, and December for the following parameters: Water Level Benzene Toluene Total Xylenes Methyl Tert-Butyl Ether Ethylbenzene 1, 2-Dibromomethane EDB 1, 2-Dichlorethane Polynuclear Aromatic Hydrocarbons (PAH) Lead EPA Method 602 EPA Method 602 EPA Method 602 EPA Method 602 EPA Method 602 EPA Method 602 EPA Method 601 EPA Method 601 EPA Method 610 or 625 EPA Method 239.2 or Standard Method 304 The water level shall be made prior to sampling for the remaining parameters. The results of the sampling and analysis shall be sent on form GW-59 within 30 days of sample collection. The influent and effluent from the treatment system shall be sampled once every two (2) weeks for the first three moths and monthly thereafter for the parameters specified below: Water Level Benzene Toluene Total Xylenes Methyl Tert-Butyl Ether Ethylbenzene 1, 2-Dibromomethane EDB 1, 2-Dichlorethane Polynuclear Aromatic Hydrocarbons (PAH) Lead EPA Method 602 EPA Method 602 EPA Method 602 EPA Method 602 EPA Method 602 EPA Method 602 EPA Method 601 EPA Method 601 EPA Method 610 or 625 EPA Method 239.2 or Standard Method 304 The results of the sampling shall be sent to the Groundwater Section in the Raleigh Regional Office within 30 days of sample collection. 3. Any groundwater quality monitoring as deemed necessary by the Division of Environmental Management shall be provided. 4. The Compliance Bound for the disposal system is specified by regulations in 15 NCAC 2L, Groundwater Classifications and Standards. An exceedance of Groundwater Quality Standards beyond the Compliance Boundary is subject to penalty provisions applicable under General Statute 143-215.6(1)a. The sale of property, by the Permittee, which is within or contiguous to the disposal system site may alter location of the Compliance Boundary. For facilities permitted on or after December 30, 1983, the Compliance Boundary is established at the lesser of 250 feet from the infiltration gallery, or 50 feet within the property boundary. If the title to any property which may affect the location of the Compliance Boundary is changed, the Permittee shall notify the DEM Director within 14 days. The Director shall then establish a modified Compliance Boundary which will be done as a modification to the Permit. The REVIEW BOUNDARY for the disposal system is specified by regulations in 15 NCAC 2L, Groundwater Classifications and Standards. A REVIEW BOUNDARY is established around disposal systems midway between the Compliance Boundary and the perimeter of the waste disposal area. When the concentration of any substance equals or exceeds the maximum allowable concentration of that substance at the REVIEW BOUNDARY, as determined by monitoring, the permittee shall either (i) demonstrate, through predictive calculations or modeling, that natural site conditions, facility design and operational controls will prevent a violation of standards at the Compliance Boundary; or, (ii) submit a plan for the alteration of existing site conditions, facility design or operational controls .that will prevent a violation of standards at the Compliance Boundary, and implement that plan upon its approval by the Director. 5. All components of the groundwater recovery, treatment and disposal system shall be properly weather -proofed to prevent freezing and failure of the system. 6. The groundwater recovery treatment and disposal system shall be inspected weekly. If it is determined that the system is malfunctioning, all repairs should be made as soon as possible and reported to the Raleigh Regional Office. 7. Two (2) weeks prior to system start-up, the Permittee shall notify the Division of Environmental Management's Raleigh Regional Office that operation is about to commence. V . INSPECTIONS 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 groundwater recovery and treatment facilities to prevent malfunctions and deterioration, operator errors and discharges which may cause or lead to the release of wastes to the environment, a threat to human health, or a nuisance. The Permittee shall 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 pernnitting 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 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 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. 4. The Permittee shall obtain a well construction permit from the Raleigh Regional Office prior to construction of the recovery wells. 5. A set of approved plans and specifications for the subject project must be retained by the Permittee for the life of this project. 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 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). 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. 5 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 25th day of March, 1993 NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION C LG rY�. C Ca -VI -�I ' xl�-, A. Preston H ward, Jr., P.11., Director Division of vironmental Management By Authority of the Environmental Management Commission Permit No, WQ0006822 6 Permit No. WQ0006822 March 25, 1993 Engineer's Certification 1, , 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 Date Registration No CAROLINA VAL RESOURCES WILS(-)IN UUAL DEVELOPMENT NORTH CAROLINA—W -CAROLINA 7.5 MINUTE SERIES 5W S ROADSJ .-735 236 55' NW/4 WILSON 15' au, 147� 238 2 330 000 FEET 239 'Toisnot 4911 4 `ice All 6 Police't -\ IRO L-L 104 V Tower C.le'int`enit�' A I. c llaRl)0j, .'_ . 7 T L ...... mapi e" • ler • -7.1 Tr Park & Qc -�N f � . ailer V OR 2 ��40. A luf jor if ff 4 :Tech Institlit X, .1 Fm Eastern NC E e7m L N for D —on 7, - t 0 60 n -po. Cent 4* -4.4 c L—j— R' h , Fie lit, _3 F A M4 04 9 P, P, L /Literary J, —tWfe Ol Wifutead c h 49 StRxrneM Sch j �S ToRest Haven Radio !w aa.. Tourers I S ewag sa _GrawJ 31 41 'Drive- in t urina4 A % cs VV Lff 5 '� ALyn 'A, 1-4— i i VIKING TIRE STORE L � �FFr I�'j4rf A G.whcild��tr /Su�.+c�A �qf�n �,t,oh caLMfy �bop��22��1✓tsZXf LEGEND_ e9 -- MONITORING WELL LOCATION TYPE III MONITOR WELL LOCATION RECOVERY WELL LOCATION lylw-5 9 LPP INFILTRATION FIELD jI __ DETAINING WALL _ 4 SIDeWJ�� 9 MW-3 NOTE: NOT FOR CONSTRUCTION I I w I ly I j �II I I I JI I Is s I� STORE .411 FISLfWFI TRATION I; s _ I I I I SIDEWALK j Ii l i PROPERTY MIv_z � II MW—fii i I MIT— I I W y � HINES STREET 0 15 30 45 60 7--1 I r-1 � T 0 1 � REMEDIATION SYSTEM LAYOUT JIFFY MART FIGURE 3 SCALE: 1" = 30' T T ENVIRONMENTAL 1 SERVICES, INC. WILSON, NORTH CAROLINA PROD. No.223-001-01 RATING SCALE FOR CLASSIFICATION OF FACILITIES Name of Plant: i Rw M a4, Owner or Contact Person: f' L, ra,7 Mailing Address: 3/(a Cha�(o�i� 6 Cet -- 1261C Mlittrla� /llG 2 J` County: w•t Telephont9��'7� NPDES Permit No. NCOO Nondisc. Per_ No IVAOO,los22 IssueDate: Expiration Date: Zb 9 Existing Facility----- New Facility— L/ Rated By: a airy e�6/1 Date: 3 Reviewed (Train. & Cert.) Reg. Office Reviewed (Train. & Cert.) Central Office ORC Grade Plant Class: (circle one) I I1 ill IV Total Points ITEM POINTS (5) SECONDARY TREATMENT UNITS (a) Carbonaceous Stage 1 ( } industrial Pretreatment Units and/or (i)Aeration - High Purity Oxygen System ..... 20 industrial Pretreatment Program Diffused Air System ......... 10 (see definition No. 33) 4 Mechanical Air System (fixed, (2) QF,$IQNN FLOW OF PLANT IN GPD floating or rotor) .............. (not applicable to non -contaminated cooling waters, sludge Separate Sludge Reaeration ..... 3 handling facilities for water purification plants, totally (ii) Trickling Filter closed cycle systems (def. No. 11), and facilities High Rate ................... 7 consisting only of Item (4) (d) or Items (4) (d) and (11) ( 0 - 20,000 Standard Hate ............... 5 .......................... Packed Tower............... 5 20.001 -- 50,000.......................... 2 (iii) Biological Aerated Filter or Aerated 50.001 -- 100,000 ............. .... .. 3 Biological Filter ........ . ............. 10 100,001 -- 250,000 ..................... . .... 4 (iv) Aerated Lagoons ..................... 10 250,001 -- 500,600.......................... 5 . 500,001-.1,000,000 .......................... 8 (v) Rotating Biological Contactors .......... 110 1,000.001 -- 2,000,000 ........................ 10 2,000.001 (and up) - rate i point additional for each (vi) Sand Filters- 200,000 gpd capacity up to a intermittent biological ..... 2 maximum of 300 ����� Design Flow recirculating biological ..... 3 (gpd) : i (vn) Stabilization Lagoons ................... 5 (3) PRELIMINARY UNITS (see definition no. 32) (viii)Clarifier . . . . . ......................... 5 (a) Bar Screens ................................ 1 (ix) Single stage system for combined or carbonaceous removal of BOD and (b) Mechanical Screens, Static Screens or nitrogenous removal by nitrification Comminuting Devices ........... ............. 2 (see def. No. 12) (Points for this item (c) Grit Removal ............................... 1 have to be in addition to items (5) (a) or (f) through (5) (a) (viff) ................. 8 (d) Mechanical or Aerated Grit Removal ........... 2 (x) Nutrient additions to enhance SOD (e) Flow Measuring Device ....... 6 ............... 1 removal .. ...... .................. 5 or (xi) Biological Culture (`Super Bugs') addition (f) instrumented Flow Measurement .............. 2 to enhance organic compound removal ..... 5 (g) Preaeration .. 6 ............ 6 ................ 2 (b) Nitrogenous Stage (h) Influent Flow,Equalization 0 (i) Aeration - High Purity Oxygen System ..... 20 ................... Diffused Air System ........... 10 (i) Grease or Oil Separators - Gravity .......... 2 Mechanical Air System (fixed, Mechanical .......... 3 floating, or rotor) ...... Dissolved Air Flotation. 8 Separate Sludge Reaeralion ..... 3 Q) Prechlorination .............................. 5 (ir) Trickling Filter - High Rate .............. 7 (4) PRIMARY TREATMENT UNITS Standard Rate ............ 5 (a) Septic Tank (see definition no. 43) .. . ........... 2 Packed Tower ............ 5 (b) Imhoff Tank .................................. 5 (iii) Biological Aerated Filter or Aerated (c) Primary Clarifiers ............................ 5 Biological Filler .. ......... , ... 10 (d) Settling Ponds or Settling Tanks for Inorganic (iv) Rotating Biological Conlaclors ............ 10 Non -toxic Materials (sludge handling facilities (v) Sand Filter - for water purification plants, sand, gravel, intermilfenl biological ........ 2 stone, and other mining operations except recirculating biological ........ 3 recreational activities such as gem or gold (v i) Clarifier ................................ 5 mining) ...................................... 2 4111111, (6) TERTIARY OR ADVANCED TREATMENT UNIT (a}, Activated Carbons Beds - withoul carbon regeneration .................. with carbon regeneration ........... ..... . (b) Powdered or Granular Activated Carbon Feed - "thout carbon regeneration ................. with carbon regeneration .................... (c) Air Stripping .......................... . (d) Denitrilication Process (separate process) .... . (e) Etectradialysis ............................. . (0 Foam Separation ............................. (g) Ion Exchange ................................ (h) Land Application of Treated Effluent (see definition no. 22b) (not applicable for sand. gravel, stone and other similar mining operations) (i) on agricuflurally managed sites (See del. No. 4)............................... . (if) by high rate inrfttration on non -agriculturally managed sites (includes rotary distributors and similar fixed nozzle systems) ........... (M) by subsurface disposal (includes low pressur pipe systems and gravity systems except at plants consisting of septic tank and nitrifica- tionlines only) ............................. (i) Microscreens.................................. {j) Phosphorus Remo -tat by Biological Processes (See def. No.26) ............................ (k) Polishing Ponds - without aeration ....... with aeration .......... (1) Post Aeration - cascade .............. diffused or mechanical ... (m) Reverse Osmosis ............................... (n) Sand or Mixed -Media Filters - low rate ........... high rate .......... (a) Treatment processes for removal of metal or cyanide.................................... (p) Treatment processes for remaval of toxic materials other than metal or cyanide ......... (10) XCHEMICAL ADDITION SYSTEM (S) (See definition No. 9) S (not applicable to chemical additions rated as item (a) (xi), (6) (a), (6) (b), (7) (b), (7) (e), (b), or 19) (c) 5 points each: List: 5 15 5 10 5 5 5 10 4 5 20 2 5 0 5 5 2 5 15 i5 I SLUDGE TREATMENT (a) Siudge Digestion Tank - Heated ............... 10 Aerobic ............... 5 Unhealed ... ......... 3 (b) Sludge Stabilization (chemical or thermal) ....... 5 (c) Sludge Drying Beds - Gravity... .......... 2 Vacuum Assisted ....... 5 (d) Sludge Elutriation ............................. 5 (e) Sludge Conditioner (chemical or thermal) ........ 5 (1) Sludge Thickener (gravity) ...................... 5 (g) Dissolved Air Flotation Unit (not applicable to a unit rates as (3) () ......... S (h) Sludge Gas Utilization (including gas storage) .... 2 (i) Sludge Holding Tank - Aerated ................ 5 Non -aerated ............ 2 (j) Sludge incinerator - (not including activated carbon regeneration) ..... 10 (k) Vacuum Filter, Centrifuge or Filter Press or other similar dewatering devices .................... 10 (8) SLUDGE DISPOSAL (including incinerated ash) (a) Lagoons ..... ...... .......................... 2 (b) Land Application (surface and subsurface) (see definition 22a) where the facility holds the land app. permit ... 10 -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 wastewater treatment facility where the sludge•is generated ......... 10 (c) Landfilled (burial) ............................ 5 (9) DISINFECTION (a) Chlorination ............................. 5 (b) Dechlorination ........................ 5 (c) Ozone .............................. 5 (d) Radiation .......................... 5 (11) MISCELLANEOUS UNITS (a) Holding Ponds, Holding Tanks or Settling Ponds for Organic or Toxic Materials including wastes from mining operations containing nitrogen and/or phosphorous compounds in amounts significantly greater than is common for domestic wastewater .......... 4 (b) Effluent Flow Equalization (not applicable to storage basins which are inherent in land application systems). 2 (c) Stage Discharge (not appticable to storage basins inherent in land application systems ....................................... 5 (e) Stand-by Power Supply _,._......... ............ 3 (f) Thermal Pollution Control Device ............................................. 3 TOTAL POINTS CLASSIFICATION Class I.........................5 - 25 Points Class 26- 50 Points Class III .._...... ........... ........ _._.» _ .. 51- 65 Points Class IV ............. 66- Up Points Facilities having a rating of one through lour points, inclusive, do not require a certified operator. Classification of all other facilities requires a comparable grade operator in responsible charge. Facilities having an activated sludge process wilt be assigned a minimum classification of Class 11. Facilities having treatment processes for the removal of metal or cyanide will be assigned a minimum classification of Class It. Facilities having treatment processes for the biological removal of phosphorus will be assigned a minimum classification of Class Ill. In -plant processes and related control equipment which are an integral part of industrial production shall not be considered waste treatment. Likewise, discharges of wastewater from residences having a design flow of 1,000 gpd or less, shall not be subject to rating. ADDITIONAL QOMMENT,