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HomeMy WebLinkAboutNC0025305_Draft Permit_20060524Michael F. Easley, Governor May 24, 2006 Dear Ms. Suttenfield: The draft permit contains the following changes from the terms contained in your current permit: A permit re-opener condition regarding nutrient management has been added to the permit. An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper Enclosed with this letter is a copy of the draft permit for your facility. Please review the draft very carefully to ensure thorough understanding of the conditions and requirements it contains. cc: NPDES Unit file RRO - Surface Water Protection Section If you have any questions or comments concerning this draft permit, call me at (919) 733-5083, extension 547. Monitoring requirements have been added for Total Kjeldhal Nitrogen and Nitrates + Nitrites pursuant to the Division’s Cape Fear River Basin permitting strategy, which is primarily concerned with the discharge of nutrients and oxygen consuming wastes. Sincerely, Robert L. Sledge Point Source Branch William G. Ross Jr., Secretary North Carolina Department of Environment and Natural Resources Phone (919) 733-7015 Fax (919)733-2496 Alan W. Klimek, P.E. Director Division of Water Quality Customer Service 1-877-623-6748 Ms. Nancy D. Suttenfield University of North Carolina 300 South Building Campus Box 1000 Chapel Hill, NC 27599-1000 Subject: Draft NPDES Permit Permit NCOO253O5 UNC Cogeneration Facility Orange County Please submit any comments to me no later than 30 days following your receipt of the draft permit. Comments should be sent to the address listed at the bottom of this page. If no adverse comments are received from the public or from you, this permit will likely be issued in July 2006, with an effective date of September 1, 2006. & sh r OneNorth Carolina Naturally /Til in > (L/UUft.*- North Carolina Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 Internet: www.ncwaterqualitv.org Location: 512 N. Salisbury St. Raleigh, NC 27604 ermit NC0025305 PERMIT University of North Carolina at Chapel Hill is hereby authorized to discharge wastewater from a facility located at the to receiving waters designated as an unnamed tributary to Morgan Creek in the Cape Fear River Basin This permit shall become effective. This permit and authorization to discharge shall expire at midnight on July 31, 2011. Signed this day. DRAFT in accordance with effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, Hl and IV hereof. In compliance with the provision of North Carolina General Statute 143-215.1, other lawful standards and regulations promulgated and adopted by the North Carolina Environmental Management Commission, and the Federal Water Pollution Control Act, as amended, the STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY TO DISCHARGE WASTEWATER UNDER THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM Alan W. Klimek, P.E., Director Division of Water Quality By Authority of the Environmental Management Commission UNC Cogeneration Facility West Cameron Avenue Chapel Hill Orange County Permit NC0025305 SUPPLEMENT TO PERMIT COVER SHEET The University of North Carolina at Chapel Hill is hereby authorized to: 1. 2. 3. i All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby revoked. As of this permit issuance, any previously issued permit bearing this number is no longer effective. Therefore, the exclusive authority to operate and discharge from this facility arises under the permit conditions, requirements, terms, and provisions included herein. This permit does not relieve the permittee from responsibility for compliance with any other applicable federal, state, or local law, rule, standard, ordinance, order, judgement, or decree. This permit is being issued with the understanding that UNC-Chapel Hill’s operation of this facility will be primarily as a non-discharge facility. If the Orange Water and Sewer Authority (OWASA) cannot accept the wastewater and stormwater, then authorization is given for the discharge to the above mentioned creek for a period of time. It should be the understanding of UNC-Chapel Hill that the option to discharge should be used only in cases in which wasteflow exceeds the amount permitted by OWASA. Continue to operate an existing wastewater treatment facility consisting of an oil/water separator, equalization basin, caustic rapid mix tank, polymer feed system, two settling tanks, acid rapid mix tank, Parshall flume (Outfall 001), and a stormwater detention pond on the west side of the site (Outfall 002) and a stormwater detention pond on the east side of the site (Outfall 003) located at UNC Cogeneration Facility, West Cameron Avenue, Chapel Hill in Orange County, and Discharge from said treatment works at the location specified on the attached map into an unnamed tributary to Morgan Creek, which is a classified WS-IV NSW waterbody in the Cape Fear River Basin. Any other wastewater, stormwater associated with industrial activities, and/or point source discharges to surface waters of the state are prohibited unless covered by another permit, authorization or approval. 0| NorthMAP NOT TO SCALE 03-06-06 D22NE/Chapel Hill.NC UNC - Chapel Hill NC0025305 Cogeneration Facility WWTP :uiBrtith 35OI54’22” 79°03’39” WSIV-NSW unnamed tributary to Morgan Creek N’lVjtis Sub-Basin: Quad #: NC00025305 - UNC Chapel Hill Latitude (001): Longitude(OOl): Stream Class: Receiving Stream: 'r ■ W r—-fV /v/zf <46r> -mi ■ i A -& f-^4-'(r^ll M?tII \ !a OTi "-^' 2 ■? sM^5 /i ^Ty w ■'/B' P®^ Permit NC0025305 A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - DRAFT MONITORING REQUIREMENTSLIMITS Sample Location1Monthly Average 0.0922 MGD EffluentFlow GrabWeekly 1. 5. There shall be no discharge of floating solids or visible foam in other than trace amounts. EFFLUENT CHARACTERISTICS 3. 4. Instantaneous Maximum This facility is being approved as a non-discharge facility with the option of an emergency discharge should OWASA be unable to handle the wasteflow from the facility. The monitoring requirements listed above only need to be completed upon discharge from this facility. If an actual discharge does not occur during a given month, then report such on the monthly monitoring reports. Sampling only needs to be completed at time of a discharge. Measurement Frequency Continuous Sample Type Recording 30.0 mg/L 15.0 mg/L 100 mg/L 20.0 mg/L 250 mg/L 250 mg/L 2/Week Weekly Weekly Weekly Weekly Weekly Weekly Weekly Quarterly Quarterly Quarterly Quarterly Episodic Weekly Weekly Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Effluent, Upstream, Downstream Effluent Effluent Effluent Effluent Effluent Effluent Effluent Effluent Effluent Effluent Effluent Effluent Effluent Effluent Effluent, Upstream, Downstream Total Residual Chlorine3 Total Suspended Solids (TSS) Oil and Grease_________ Chlorides_____________ Sulfates______________ Copper______________ Iron_________________ Zinc________________ Total Nitrogen4 (mg/L)_____ TKN________________ NOs-N + NOz-N_________ Total Phosphorus________ Acute Toxicity5__________ pH6_________________ Conductivity Temperature (gC)2 During the period beginning on the effective date of this permit and lasting until expiration, the Permittee is authorized to discharge from outfall 001 (Lcnv Volume Waste, Coal Pile Runoff, Stormwater Runoff [Fuel Storage Area]). Such discharges shall be limited and monitored by the Permittee as specified below: Notes: Sample locations: Upstream - upstream at vault prior to reaching unnamed tributary; Downstream- downstream at convenient site prior to reaching Morgan Creek. 2. The temperature of the effluent shall be such as not to cause an increase in the temperature of the receiving stream of more than 2.8°C and in no case cause the ambient water temperature to exceed 32°C. Chlorine shall be monitored if chlorine is added to any wastestream. TN = TKN + NO3-N + NO2-N, where TN is Total Nitrogen, TKN is Total Kjeldahl Nitrogen, and NO3-N and NO2-N are Nitrate and Nitrite Nitrogen, respectively. Acute toxicity (24 hr, fat head minnow test) shall be performed on an episodic basis. See Part A.(4.) 6. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored weekly at the effluent by grab sample. •ermit NC0025305 A. (2.) STORMWATER MONITORING REQUIREMENTS/Analytical Monitoring - DRAFT LIMITS Units SDO 1. 2. 3. 4. STORMWATER DISCHARGE CHARACTERISTICS Cut-off Concentration^ Measurement Frequency^ Sample Type Sample Location^ 30.0 120.0 100.0 Annual Annual Annual Annual Annual Annual Grab Grab Grab SDO SDO SDO MG Inches Minutes Mg/I Mg/I Mg/I Total Flow4 Total Rainfall4 Event Duration Oil and Grease COD________ TSS For purposes of the stormwater sampling required in this permit, all samples shall be collected from a discharge resulting from a representative storm event (See Part A.(7)). During the period beginning on the effective date of the permit and lasting until expiration or expansion, the Permittee is authorized to discharge from outfall(s) serial numbers 002 and 003 (Stormwater). Such discharges shall be limited and monitored by the permittee as specified below: MONITORING REQUIREMENTS Notes: Cutoff Concentration. For each parameter, the arithmetic mean of all analytical sampling results collected during the first year of the permit shall be calculated for each individual outfall and compared to the cut-off concentrations listed. If the arithmetic mean is below the specified cut-off concentration for a given parameter, then the facility is not required to continue annual analytical monitoring for that parameter at the outfall during the term of the permit unless a significant change in facility operations or configuration occurs. If a cut-off concentration results in discontinued analytical monitoring at an individual discharge outfall, the permittee is required to maintain facility operations that ensure the continuation of stormwater runoff quality. Measurement frequency. Once per year. The facility must perform analytical sampling during the first full year and last year of the permit term regardless of cut-off concentration conditions. Analytical results from sampling during the final year of the permit term must be submitted with the permit renewal application. Failure to monitor storm events in accordance with the specified frequency shall constitute a violation of this permit. Sample Location. Samples to be collected at each stormwater discharge outfall (SDO) unless representative outfall status has been granted. If a facility has multiple discharge locations with substantially identical stormwater discharges that are required to be sampled, the Permittee may petition the Director for representative outfall status. If it is established that the stormwater discharges are substantially identical and the permittee is granted representative outfall status, then sampling requirements may be performed at a reduced number of outfalls. For each sampled representative storm event the total precipitation, storm duration, and total flow must be monitored. Total flow shall be either: (a) measured continuously, (b) calculated based on the amount of area draining to the outfall, the amount of build-upon (impervious) area, and the total amount of rainfall, or (c) estimated by the measurement of flow at 20 minute intervals during the rainfall event (not to exceed three hours). Permit NC0025305 A (3). STORMWATER MONITORING REQUIREMENTS/ Qualitative Monitoring - DRAFT Qualitative monitoring requires a qualitative inspection of each stormwater outfall, regardless of representative outfall status, for the purpose of evaluating the effectiveness of the Stormwater Pollution Prevention Plan and assessing new sources of stormwater pollution. No analytical tests are required. Qualitative monitoring of stormwater outfalls does not need to be performed during a representative storm event. Notes: 1. Measurement Frequency. The first qualitative monitoring event during the term of the permit must be performed during the initial analytical monitoring event. All subsequent qualitative monitoring will be performed twice per year, once in the spring (April - June) and once in the fall (September - November). Sample Location: SDO- Stormwater Discharge Outfall. Stormwater Discharge Characteristics________________________ Color_________________________________ Odor_________________________________ Clarity________________________________ Floating Solids__________________________ Suspended Solids_______________________ Foam_________________________________ Oil Sheen______________________________ Other obvious indicators of stormwater pollution Measurement Frequency1 Semi-Annual Semi-Annual Semi-Annual Semi-Annual Semi-Annual Semi-Annual Semi-Annual Semi-Annual Sample Location2 SDO SDO SDO SDO SDO SDO SDO SDO ermit NC0025305 A.(4.) ACUTE TOXICITY MONITORING (EPISODIC) Should any test data from either these monitoring requirements or tests performed by the North Carolina Division of Water Quality indicate potential impacts to the receiving stream, this permit may be re-opened and modified to include alternate monitoring requirements or limits. The permittee shall conduct FIVE acute toxicity tests using protocols defined as definitive in E.P.A. Document EPA/600/4-90/027 entitled “Methods for Measuring the Acute Toxicity of Effluents to Freshwater and Marine Organisms.” The monitoring shall be performed as a Fathead Minnow (Pimephales promelas) 24 hour static test. Effluent samples for self-monitoring purposes must be obtained below all waste treatment. Sampling and subsequent testing will occur during the first five discrete discharge events after the effective date of this permit. After monitoring of the first five toxicity tests, the permittee will conduct one test annually, with the annual period beginning in January of the next calendar year. The annual test requirement must be performed and reported by June 30. If no discharge occurs by June 30, notification will be made to the Division by this date. Toxicity testing will be performed on the next discharge event for the annual test requirement. Test data shall be complete and accurate and include all supporting chemical/physical measurements performed in association with the toxicity tests, as well as all dose/response data. Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for disinfection of the waste stream. NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism survival and appropriate environmental controls, shall constitute an invalid test and will require immediate follow-up testing to be completed no later than the last day of the month following the month of the initial monitoring. Attention: Environmental Sciences Section North Carolina Division of Water Quality 1621 Mail Service Center Raleigh, N.C. 27699-1621 The parameter code for this test is TAE6C. All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge Form (MR-1) for the month in which it was performed, using the appropriate parameter code. Additionally, DWQ Form AT-1 (original) is to be sent to the following address: Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Section no later than 30 days after the end of the reporting period for which the report is made. Permit NC0025305 A.(5.) STORMWATER POLLUTION PREVENTION PLAN a. (1) (2) (3) (4) (5) b. (1) A general location map (USGS quadrangle map, or appropriately drafted equivalent map), showing the facility's location in relation to transportation routes and surface waters, and the name of the receiving water(s) to which the stormwater outfall(s) discharges. If the discharge is to a municipal separate storm sewer system, the name of the municipality and the ultimate receiving waters, and accurate latitude and longitude of the point(s) of discharge must be shown. A narrative description of storage practices, loading and unloading activities, outdoor process areas, dust or particulate generating or control processes, and waste disposal practices. A list of significant spills or leaks of pollutants that have occurred at the facility during the 3 previous years and any corrective actions taken to mitigate spill impacts. Certification that the stormwater outfalls have been evaluated for the presence of non­ stormwater discharges. The certification statement will be signed in accordance with the requirements found in Part H, Section B.l 1. A study addressing the technical and economic feasibility ofchanging the methods of operations and/or storage practices to eliminate or reduce exposure of materials and processes to stormwater. Wherever practicable the permittee should consider covering storage areas, material handling operations, manufacturing or fueling operations to prevent materials exposure to stormwater. In areas where elimination of exposure is not practicable, the stormwater management plan shall document the feasibility of diverting the stormwater runoff away from areas of potential contamination. A site map (or series of maps) drawn to scale with the distance legend indicating location of industrial activities (including storage of materials, disposal areas, process areas, and loading and unloading areas), drainage structures, drainage areas for each outfall and activities occurring in the drainage area, building locations and impervious surfaces, the percentage of each drainage area that is impervious. For each outfall, a narrative description of the potential pollutants which could be expected to be present in the regulated stormwater discharge. The permittee shall develop a Stormwater Pollution Prevention Plan, herein after referred to as the Plan. The Plan shall be considered public information in accordance with Part II, Section E.10. of this permit. The Plan shall include, at a minimum, the following items: Site Plan: The site plan shall provide a description of the physical facility and the potential pollutant sources which may be expected to contribute to contamination of regulated stormwater discharges. The site plan shall contain the following: Stormwater Management Plan: The stormwater management plan shall contain a narrative description of the materials management practices employed which control or minimize the exposure of significant materials to stormwater, including structural and non-structural measures. The stormwater management plan, at a minimum, shall incorporate the following: Permit NC0025305 (2) (3) (4) c. d. e. f. Preventative Maintenance and Good Housekeeping Program: A preventative maintenance program shall be developed. The program shall document schedules of inspections and maintenance activities of stormwater control systems, plant equipment and systems. Inspection of material handling areas and regular cleaning schedules of these areas shall be incorporated into the program. The Stormwater Pollution Prevention Plan shall identify a specific position(s) responsible for the overall coordination, development, implementation, and revision to the Plan. Responsibilities for all components of the Plan shall be documented and position(s) assignments provided. A narrative description of Best Management Practices (BMPs) to be considered such as, but not limited to, oil and grease separation, debris control, vegetative filter strips, infiltration and stormwater detention or retention, where necessary. The need for structural BMPs shall be based on the assessment of potential of sources contributing significant quantities of pollutants to stormwater discharges and data collected through monitoring of stormwater discharges. Inspection schedules of stormwater conveyances and controls and measures to be taken to limit or prevent erosion associated with the stormwater systems. A schedule to provide secondary containment for bulk storage of liquid materials, storage of Section 313 of Title III of the Superfund Amendments and Reauthorization Act (SARA) water priority chemicals, or storage of hazardous materials to prevent leaks and spills from contaminating stormwater runoff. If the secondary containment devices are connected directly to stormwater conveyance systems, the connection shall be controlled by manually activated valves or other similar devices [which shall be secured with a locking mechanism] and any stormwater that accumulates in the containment area shall be at a minimum visually observed prior to release of the accumulated stormwater. Accumulated stormwater shall be released if found to be uncontaminated. Records documenting the individual making the observation, the description of the accumulated stormwater and the date and time of the release shall be kept for a period of five years. Training schedules shall be developed and training provided at a minimum on an annual basis on proper spill response and cleanup procedures and preventative maintenance activities for all personnel involved in any of the facility's operations that have the potential to contaminate stormwater runoff. Facility personnel (or team) responsible for implementing the training shall be identified in the plan. Spill Prevention and Response Plan: The Spill Prevention and Response Plan shall incorporate a risk assessment of potential pollutant sources based on a materials inventory of the facility. Facility personnel (or team) responsible for implementing the plan shall be identified in the plan. A responsible person shall be on-site at all times during facility operations that have the potential to contaminate stormwater runoff through spills or exposure of materials associated with the facility operations. Permit NC0025305 g- h. i. A.(6.) STORMWATER MINIMUM MONITORING AND REPORTING REQUIREMENTS a. b. Plan Amendment: The permittee shall amend the Plan whenever there is a change in design, construction, operation, or maintenance which has a significant effect on the potential for the discharge of pollutants via a point source to surface waters. The Stormwater Pollution Prevention Plan shall be reviewed and updated on an annual basis. The director may notify the permittee when the Plan does not meet one or more of the minimum requirements of the permit. Within 30 days of such notice, the permittee shall submit a time schedule to the Director for modifying the Plan to meet minimum requirements. The permittee shall provide certification in writing (in accordance with Part HI, Standard Conditions, Section B.l 1.) to the Director that the changes have been made. Visual monitoring as required in A(4) Stormwater Monitoring Requirements/Qualitative Monitoring shall be performed in addition to facility inspections. Implementation: Implementation of the Plan shall include documentation of all monitoring, measurements, inspections, maintenance activities and training provided to employees, including the log of the sampling data. Activities taken to implement BMPs associated with the industrial activities, including vehicle maintenance activities, must also be recorded. All required documentation shall be kept on-site for a period of five years and made available to the Director or his authorized representative immediately upon request. Facility Inspections: Inspections of the facility and all stormwater systems shall occur at a minimum on a semiannual schedule, once in the fall (September - November) and once during the spring (April - June). The inspection and any subsequent maintenance activities performed shall be documented, recording date and time of inspection, individual(s) making the inspection and a nanative description of the facility's stormwater control systems, plant equipment and systems. Records of these inspections shall be incorporated into the Stormwater Pollution Prevention Plan. If a facility has multiple discharge locations with substantially identical stormwater discharges that are required to be sampled, the permittee may petition the Director for representative outfall status. If it is established that the stormwater discharges are substantially identical and the permittee is granted representative outfall status, then sampling requirements may be performed at a reduced number of outfalls. Visual monitoring for color, odor, solids, foam, outfall staining, visible sheens and dry weather flow shall be performed at all stormwater discharge outfall locations. All visual monitoring shall be documented and records maintained with the Stormwater Pollution Prevention Plan. The initial visual monitoring event shall be performed simultaneously with the first analytical monitoring event and documentation of only this initial visual monitoring event shall be submitted along with the required analytical monitoring submittal. Minimum monitoring and reporting requirements are as follows unless otherwise approved in writing by the Director of the Division of Water Quality: Permit NC0025305 c. (1) (2) d. e. f. (1)All other discharges that are authorized by an NPDES permit. (2) (3)Discharges resulting from fire-fighting. g- A.(7.) STORMWATER DEFINITIONS 1. Best Management Practices (BMPs) Samples analyzed in accordance with the terms of this permit shall be submitted on forms approved by the Director no later than January 31 for the previous year in which sampling was required to be performed. Analytical results from sampling during the final year of the permit term shall be submitted with the permit renewal application. If the detention pond detains the runoff generated by one inch of rainfall for 24 hours, visual observations for color, foam, outfall staining, visible sheens and dry weather flow are required, but analytical sampling shall not be required. If the detention pond discharges only in response to a storm event exceeding a 25-year, 24-hour storm, the pond shall be considered a non-discharging stormwater control system and not subject to NPDES requirements, unless the discharge causes a violation of water quality standards. Foundation drains, air-conditioner condensate without added chemicals, springs, waterline and fire hydrant, water from footing drains, flows from riparian habits and wetlands, fire-fighting training and fire system testing. Measures or practices used to reduce the amount of pollution entering surface waters. BMPs may take the form of a process, activity, or physical structure. For purposes of the stormwater sampling required in this permit, all samples shall be collected from a discharge resulting from a representative storm event (See definitions in Part II, Section A). Failure to monitor storm events in accordance with the specified frequency shall constitute a violation of this permit. If the stormwater runoff is controlled by a detention pond, the following sampling requirements shall apply: This permit regulates stormwater discharges associated with industrial activity. Non­ stormwater discharges which shall be allowed in the stormwater conveyance system are: If the storm event monitored and reported in accordance with this permit coincides with a non­ stormwater discharge, the permittee shall separately monitor and report all parameters as required under the non-stormwater portion of this permit and provide this information with the stormwater discharge monitoring report. Permit NC0025305 2. Bulk Storage of Liquid Products 3. Landfill 4. Point Source Discharge of Stormwater 5. Representative Storm Event 6. Secondary Containment 7. Section 313 Water Priority Chemical A chemical or chemical category which: a. b. That meet at least one of the following criteria:c. (1) Spill containment for the contents of the single largest tank within the containment structure plus sufficient freeboard to allow for the 25-year, 24-hour storm event. Liquid raw materials, manufactured products, waste materials or by-products with a single above ground storage container having a capacity of greater than 660 gallons or with multiple above ground storage containers located in close proximity to each other having a total combined storage capacity of greater than 1,320 gallons. A disposal facility or part of a disposal facility where waste is placed in or on land and which is not a land treatment facility, a surface impoundment, an injection well, a hazardous waste long-term storage facility or a surface storage facility. Any discernible, confined and discrete conveyance including, but not specifically limited to, any pipe, ditch, channel, tunnel, conduit, well, or discrete fissure from which stormwater is or may be discharged to waters of the state. Is present at or above threshold levels at a facility subject to SARA title DI, Section 313 reporting requirements; and A storm event that measures greater than 0.1 inches of rainfall and that is preceded by at least 72 hours in which no storm event measuring greater than 0.1 inches has occurred. A single storm event may contain up to 10 consecutive hours of no precipitation. For example, if it rains for 2 hours without producing any collectable discharge, and then stops, a sample may be collected if a rain producing a discharge begins again within the next 10 hours. Is listed in 40 CFR 372.65 pursuant to Section 313 of Title HI of the Superfund Amendments and Reauthorization Act (SARA) of 1986, also titled the Emergency Planning and Community Right-to-Know Act of 1986; Is listed in Appendix D of 40 CFR part 122 on either Table II (organic priority pollutants), Table III (certain metals, cyanides, and phenols) or Table IV (certain toxic pollutants and hazardous substances); ermit NC0025305 (2) (3) 8. Significant Materials 9. Significant Spills 10. Stormwater Associated with Industrial Activity 11. Stormwater Runoff 12. Grab Sample 13. Visible Sedimentation 14. Municipal Separate Storm Sewer System The flow of water which results from precipitation and which occurs immediately following rainfall or as a result of snowmelt. Solid particulate matter, both mineral and organic, that has been or is being transported by water, air, gravity, or ice from its site of origin which can be seen with the unaided eye. Is listed as a hazardous substance pursuant to section 311(b)(2)(A) of the CWA at 40 CFR 116.4; or Is a pollutant for which ERA has published acute or chronic water quality criteria. The discharge from any point source which is used for collecting and conveying stormwater and which is directly related to manufacturing, processing or raw material storage areas at an industrial site. Facilities considered to be engaged in "industrial activities" include those activities defined in 40 CFR 122.26(b)(14). The term does not include discharges from facilities or activities excluded from the NPDES program. Includes, but is not limited to: releases of oil or hazardous substances in excess of reportable quantities under section 311 of the Clean Water Act (Ref: 40 CFR 110.10 and CFR 117.21) or section 102 of CERCLA (Ref: 40 CFR 302.4). An individual sample collected instantaneously. Grab samples that will be directly analyzed or qualitatively monitored must be taken within the first 30 minutes of discharge. A stormwater collection system within an incorporated area of local self-government such as a city or town. Includes, but is not limited to: raw materials; fuels; materials such as solvents, detergents, and plastic pellets; finished materials such as metallic products; raw materials used in food processing or production; hazardous substances designated under section 101(14) of CERCLA; any chemical the facility is required to report pursuant to section 313 of Title IH of SARA; fertilizers; pesticides; and waste products such as ashes, slag and sludge that have the potential to be released with stormwater discharges. Permit NC0025305 15. Rinse Water Discharge 16. Stormwater Pol 1 ution Prevention Plan 17. Ten Year Design Storm 18. Total Flow 19. 25-year, 24 hour storm event A. (8.) PERMIT RE-OPENER: NUTRIENT CONTROLS The discharge of rinse water from equipment cleaning areas associated with industrial activity. Rinse waters from vehicle and equipment cleaning areas are process wastewaters and do not include washwaters utilizing any type of detergent or cleaning agent. A comprehensive site-specific plan which details measures and practices to reduce stormwater pollution and is based on an evaluation of the pollution potential of the site. The maximum 24 hour precipitation event expected to be equaled or exceeded on the average once in ten years. Design storm information can be found in the State of North Carolina Erosion and Sediment Control Planning and Design Manual. The flow corresponding to the time period over which the entire storm event occurs. Total flow shall be either; (a) measured continuously, (b) calculated based on the amount of area draining to the outfall, the amount of built-upon (impervious) area, and the total amount of rainfall, or (c) estimated by the measurement of flow at 20 minute intervals during the rainfall event. The maximum 24-hour precipitation event expected to be equaled or exceeded, on the average, once in 25 years. The Division may, upon written notification to the Permittee, re-open this Permit in order to incorporate or modify effluent limitations, monitoring and reporting requirements, and other permit conditions when it deems such action is necessary to implement nutrient management requirements such as those established through rulemaking or USEPA approval of TMDL(s).