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HomeMy WebLinkAboutNCS000554_Buck CTCC Draft Permit_20120323STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY PERMIT TO DISCHARGE STORMWATER UNDER THE NATIONAL POLLUTANT DISCHARGE El NATION SYSTEM NCS000554 In compliance with the provisions of North Carolina oral St F143 -215 1, other lawful standards and regulations promulgated and adopted b orth Carolina Environmental Management Commission, and the Federal Water lut' n 6 ntrol Act, as amended, Duke En gar, , inas, LLC is hereby authoriz to is , e stormwater from a facility located at Buck bust urbine Combined Cycle Station 385 Dukevllle Road Salisbury, NC Rowan Couniy to receiving waters designated as The Yadkin River (Upper Portion of High Rock Lake), a class WS -V stream in the Yadkin -Pee Dee River Basin, in accordance with the discharge limitations, monitoring requirements, and other conditions set forth in Parts I, II, III, IV, V and VI hereof. Note Draft Permit Dates are Approximate This permit shall become effective April 1, 2012. This permit and the authorization to discharge shall expire at midnight on March 31, 2017 Signed this day of March 23, 2012 for Coleen H. Sullins Director Division of Water Quality By the Authority of the Environmental Management Commission Permit No NCS000554 TABLE OF CONTENTS PART I INTRODUCTION Section A: Individual Permit Coverage Section B: Permitted Activities Section C: Location Map PART II MONITORING, CONTROLS, AND LI S FO PERMITTED DISCHARGES Section A: Stormwater Pollution Prevention PI Section B: Analytical Monitoring Requir e Section C: Qualitative Monitoring R uir en s Section D: On -Site Vehicle . � to c Monitoring Requirements PART III STANDARD i DITI S FOR NPDES STORMWATER INDIVIDUAL PERMITS Section A: Compliance and Liability 1. Compliance Schedule 2 Duty to Comply 3. Duty to Mitigate 4 Civil and Criminal Liability 5. Oil and Hazardous Substance Liability 6. Property Rights 7. Severability 8. Duty to Provide Information 9. Penalties for Tampering 10 Penalties for Falsification of Reports Section B: General Conditions 1 Individual Permit Expiration 2. Transfers 3. Signatory Requirements i Permit No NCS000554 4. Individual Permit Modification, Revocation and Reissuance, or Termination 5. Permit Actions Section C: ' Operation and Maintenance of Pollution Controls 1. Proper Operation and Maintenance 2. Need to Halt or Reduce Not a Defense 3. Bypassing of Stormwater Control Facilities Section D: Monitoring and Records 1. Representative Sampling 2 Recording Results 3. Flow Measurements 4. Test Procedures 5. Representative Out 6. Records Retent'o , 7. Inspe on n n Section E: Reporting Re em , is 1. Dis arge M storing Reports 2. Su. m ' eports 3. Avai a ility of Reports 4. Non - Stormwater Discharges 5. Planned Changes 6 Anticipated Noncompliance 7 Spills 8. Bypass 9. Twenty -four Hour Reporting 10. Other Noncompliance 11. Other Information PART IV LIMITATIONS REOPENER PART V ADMINISTERING AND COMPLIANCE MONITORING FEE REQUIREMENTS PART VI DEFINITIONS Permit No NCS000554 PART I INTRODUCTION SECTION A: INDIVIDUAL PERMIT COVERAGE During the period beginning on the effective date of the permit and lasting until expiration, the permittee is authorized to discharge stormwater associated with industrial activity. Such discharges shall be controlled, limited and monitored as specified in this permit. If industrial materials and activities are not exposed to precipitation or runoff as described in 40 CFR § 122 26(g), the facility may qualify for a No Eeifo sion from NPDES stormwater discharge permit requirements Any owner or opera obtain a No Exposure Certification must submit a No Exposure Certificatio th Division; must receive approval by the Division; must maintain no exposur s authorized to discharge under a valid NPDES stormwater permit; and must o Exposure Exclusion once every five (5) y ears SECTION B: PERMITTED A Until this permit expires or is *1el &ae Yce"�dd� the permittee is authorized to discharge stormwater to the surface wate lina or separate storm sewer system that has been adequately treated and managed ' -c with the term s and conditions of this individual permit. All stormwater disch es sha - in accordance with the conditions of this permit. Any other point source disc, urface waters of the state is prohibited unless it is an allowable non - stormwater d ge or is covered by another permit, authorization, or approval. The stormwater discharges allowed by this individual permit shall not cause or contribute to violations of Water Quality Standards. This permit does not relieve the permittee from responsibility for compliance with any other applicable federal, state, or local law, rule, standard, ordinance, order, judgment, or decree. Part 1 Page 1 of 2 SECTION C: LOCATION MAP Permit No NCS000554 k Q z�- , �'Vtl 0 tt -Tw M. R 'J 1k W- # -N&" ��R 0 N, A% 20— LF �A -7 vi. �­N Y ,' gj ' ' ( • l'i J'' ` ^ V II C f ,1 IJ ' r 1f Y -. •II+ �r \'`' `. 1 11 �`- f _Yrr Ir A" 16. x �A Buck Combustion Turbine Combined Cycle Facility q _A; P 71, S M5 `� r' 4 IA �"}j - ,'_'^,"- ;�I '�°. -_i +.. , 1•, .r � 4.14'°.i' � L f s _ ?', `�. } 'r -- -r'r_ -� C� Z. 4 1_4 Jim rl�J•_ 'r � ,�'�,�•Wnr.x- y_J!'''' ^(,�'. 'iI •Jr= -; Rq��, c,. ;4 —_� l4JI'' _ _ �I �tr� y =:f�- .+'-._ '' ?rL'f _�'��r+�� ir�lr F� '�) 01, ji f. OIL k_1 f�m: fl R)I iI' JIM- L q I ':�/ �; I It . i r J IT, , NCS000554 Duke Energy Carolinas,, LLC Buck CTCC Station Latitude: 350 42' 30" N All, R. E Longitude: 8011 22' 40" IN County: Rowan S Receiving Stream: Yadkin River Stream Class: %,VS-V map sc,31e 1;24,000 1 Sub-basin: 03-07-04 (Yadkin River Basin) Facility Location Paq 1. Paae 2 02 Permit No NCS000554 PART II MONITORING, CONTROLS, AND LIMITATIONS FOR PERMITTED DISCHARGES SECTION A: STORMWATER POLLUTION PREVENTION PLAN The Permittee shall develop a Stormwater Pollution Prevention Plan, herein after referred to as the Plan This Plan shall be considered public information in accordance with Part III, Standard Conditions, Section E, Paragraph 3 of this individual permit. The Plan shall include, at a minimum, the following items: 1. Site Plan. The site plan shall provide a description of the physical facility and the potential pollutant sources which may be expect d t tribute to contamination of stormwater discharges. The site plan shall con in t fo ,lowi (a) A general location map (USGS quadra J ap or appropriately drafted equivalent map), showing the facilit ' to do in relation to transportation routes and surface waters, the name of t ee in ater(s) to which the stormwater outfall(s) discharges, or if the sch g is a municipal separate storm sewer system, the name of the mu a y a the ultimate receiving waters, and accurate latitude a d Ion ' e oint(s) of discharge The general location map (or alternate eh e 'te ap shall identify whether each receiving water is impaired (on the s t N 0 d ist of impaired waters) or is located in a watershed for c T , - has been established, and what the parameter(s) of concern are (b) A narrative d se , , n of storage practices, loading and unloading activities, outdoor process areas, dust or particulate generating or control processes, and waste disposal practices. A narrative description of the potential pollutants which could be expected to be present in the stormwater discharge from each outfall (c) A site map drawn to scale (including a distance legend) showing: the site property boundary, the stormwater discharge outfalls, all on -site and adjacent surface waters and wetlands, industrial activity areas (including storage of materials, disposal areas, process areas, loading and unloading areas, and haul roads), site topography, all drainage features and structures, drainage areas for each outfall, direction of flow in each drainage area, industrial activities occurring in each drainage area, buildings, existing BMPs, and impervious surfaces. The site map must indicate the percentage of each drainage area that is impervious. (d) A list of significant spills or leaks of pollutants that have occurred at the facility during the three,(3) previous years and any corrective actions taken to mitigate spill impacts. (e) 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 III, Standard Conditions, Section Part II Page 1 of 10 Permit No NCS000554 B, Paragraph 3. The permittee shall re- certify annually that the stormwater outfalls have been evaluated for the presence of non - stormwater discharges. 2. 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 nonstructural measures. The stormwater management plan, at a minimum, shall incorporate the following: (a) Feasibility Study. A review of the technical and economic feasibility of changing the methods of operations and /or storage practices to eliminate or reduce exposure of materials and processes to stormwater. Wherev > practical, the permittee shall prevent exposure of all storage areas, materia �h, #Oling operations, and manufacturing or fueling operations I ea- here elitpination of exposure is not practical, the stormwater manage nt n ' 611� x ument the feasibility of diverting the stormwater runoff away o areas o otential contamination. (b) Secondary Containment Require Is d ' e` ords Secondary containment is required for- bulk storage of li d e , storage in any amount of Section 313 of Title III of the Super f , A, en ents and Reauthorization Act (SARA) water priority chemicals; ' stogy any amount of hazardous substances, in order to prevent a s 'lls stormwater runoff. A table or summary of all c ,ja < , stored materials and their associated secondary containment areab tained. If the secondary containment devices are connected to st wate veyance systems, the connection shall be controlled by manually ivated Ives or other similar devices (which shall be secured closed with aalo echanism), and any stormwater that accumulates in the containment a all be at a minimum visually observed for color, foam, outfall staining, visible sheens and dry weather flow, prior to release of the accumulated stormwater. Accumulated stormwater shall be released if found to be uncontaminated by any material. 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. (c) BMP Summary. A listing of site structural and non - structural Best Management Practices (BMP) shall be provided The installation and implementation of BMPs shall be based on the assessment of the potential for sources to contribute significant quantities of pollutants to stormwater discharges and data collected through monitoring of stormwater discharges. The BMP Summary shall include a written record of the specific rationale for installation and implementation of the selected site BMPs. The BMP Summary shall be reviewed and updated annually. 3. Spill Prevention and Response Plan. The Spill Prevention and Response Plan (SPRP) shall incorporate an assessment of potential pollutant sources based on a materials inventory of the facility. Facility personnel (or the team) responsible for implementing the SPRP shall be identified in a written list incorporated into the SPRP and signed and dated by each individual acknowledging their responsibilities for the plan. A responsible Part 11 Page 2 of 10 Permit No NCS000554 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. The SPRP must be site stormwater specific. Therefore, an oil Spill Prevention Control and Countermeasure plan (SPCC) may be a component of the SPRP, but may not be sufficient to completely address the stormwater aspects of the SPRP. The common elements of the SPCC with the SPRP may be incorporated by reference into the SPRP. 4. Preventative Maintenance and Good Housekeeping Program. A preventative maintenance and good housekeeping program shall be developed. The program shall list all stormwater control systems, stormwater discharge outfalls, all on -site and adjacent surface waters and wetlands, industrial activity areas (including material storage areas, material handling areas, disposal areas, process areas, oi-Aing and unloading areas, and haul roads), all drainage features and structure , d exli nP strtactural BMPs The program shall establish schedules of inspectio activities of stormwater control systems, as w facility systems that present a potential for st Inspection of material handling areas and ,u be incorporated into the program. Tim y c inspections, maintenance, and house n in the SPPP. _ nt Kipment, nd housekeeping cilit l facility areas, and exposure or stormwater pollution. ,` F#ing schedules of these areas shall with the established schedules for recorded in writing and maintained Employee Training. TraiTr4q,g o j� shall be developed and training provided at a minimum on an annual b r ci y personnel with responsibilities for spill response and cleanup, preventat' e main ce activities, and for any of the facility's operations that have the potentialo cont , inate stormwater runoff. Facility personnel (or team) responsible for impl � � - ' e training shall be identified, and their annual training shall be documented signature of each employee trained. 6. Responsible Party 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 assignments provided. 7 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 to surface waters. All aspects of the Stormwater Pollution Prevention Plan shall be reviewed and updated on an annual basis. The annual update shall include an updated list of significant spills or leaks of pollutants for the previous three years, or the notation that no spills have occurred. The annual update shall include written re- certification that the stormwater outfalls have been evaluated for the presence of non - stormwater discharges. Each annual update shall include a documented re- evaluation of the effectiveness of the BMPs listed in the BMP Summary of the Stormwater Management Plan. 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 Part II Page 3 of 10 Permit No NCS000554 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 I11, Standard Conditions, Section B, Paragraph 3) to the Director that the changes have been made. 8. Facility Inspections. Inspections of the facility and all stormwater systems shall occur as part of the Preventative Maintenance and Good Housekeeping Program at a minimum on a semi - annual schedule, once during the first half of the year (January to June), and once during the second half (July to December), with at least 60 days separating inspection dates (unless performed more frequently than semi - annually). These facility inspections are different from, and in addition to, the stormwater discharge characteristic monitoring required in Part 11 B and C of this permit. A. 9. Implementation. The permittee shall im shall include documentation of all moni activities, and training provided to empl of actions taken to implement BMPs asp vehicle maintenance activities. Such do five years and made available to the Dir, immediately upon request. , Part 11 Page 4 of 10 of the Plan ie=n'>s spections, maintenance Mlog of the sampling data and industrial activities, including 1 be kept on -site for a period of ;tor's authorized representative Permit No NCS000554 SECTION B: ANALYTICAL MONITORING REQUIREMENTS Analytical monitoring of stormwater discharges shall be performed as specified in Table 1. All analytical monitoring shall be performed during a measurable storm event. The required monitoring will result in a minimum of ten analytical samplings being conducted over the term of the permit at each stormwater discharge outfall (SDO). A measurable storm event is a storm event that results in an actual discharge from the permitted site outfall The previous measurable storm event must have been at least 72 hours prior. The 72 -hour storm interval does not apply if the permittee is able to document that a shorter interval is representative for local storm events during the sampling period, and obtains approval from the local DWQ Regional Office. See definitions for more information Table 1. Analvtical MonitorinLy Requirement Discharge, Charact_er stics� _ ITnits Measurement Fr�equenc�yl' �! � Sample t M Sample Woc�'" 1 tion` Total Suspended Solids mg /L e - ual Grab SDO Non -Polar Oil & Grease / TPH [EPA Method 1664 (SGT -HEM)] /1 &4 Vmi-annual Grab SDO H s da semi- annual Grab SDO Total Rainfall4 inch semi - annual Rain Gauge - Footnotes I Measurement Frequency Twic ear during a measurable storm event 2 Grab samples shall be collected within the first 30 minutes of discharge 3 Sample Location Samples shall be collected at each stormwater discharge outfall (SDO) unless representative outfall status has been granted 4 For each sampled measurable storm event the total precipitation must be recorded An on -site rain gauge or local rain gauge reading must be recorded The permittee shall complete the minimum ten analytical samplings in accordance with the schedule specified below in Table 2 A minimum of 60 days must separate Period 1 and Period 2 sample dates unless monthly monitoring has been instituted under a Tier Two response. Part 11 Page 5 of 10 Permit No NCS000554 Table 2. Monitorine Schedule Monitoring perriogdi'2 Sample Number `fj Start `� En4 Year 1 — Period 1 1 July 1, 2012 December 31, 2012 Year 1 — Period 2 2 January 1, 2013 June 30, 2013 Year 2 — Period 1 3 July 1, 2013 December 31, 2013 Year 2 — Period 2 4 January 1, 2014 June 30, 2014 Year 3 — Period 1 5 July 1, 2014 December 31, 2014 Year 3 — Period 2 6 January 1, 2015 June 30, 2015 Year 4 — Period 1 7 July 1, 2015 December 31, 2015 Year 4 — Period 2 8 January 1, 2016 June 30, 2016 Year 5 — Period 1 9 July 1, O1 _ December 31, 2016 Year 5 — Period 2 10 Jana_ 7 March 31, 2017 Footnotes 1 Maintain semi- annual monitoring during permit renem Permit, the permittee has submitted an application for the permittee will be considered for renewed covera monitoring until the renewed permit is issued 2 If no discharge occurs during the sampling per , t "No Flow" within 30 days of the end of the -m h If Athelexpiration of the Individual coverage before the submittal deadline, scant must continue semi- annual fte must submit a monitoring report indicating mg period The permittee shall report the an .. ihal u from each sample within the monitoring period. The permittee shall compare monitori s s e benchmark values in Table 3. The benchmark values in Table 3 are not pe imits hould be used as guidelines for the permittee's Stormwater Pollution Preve i n Plan PPP). Exceedences of benchmark values require the permittee to increase monit i ase management actions, increase record keeping, and /or install stormwater Best Man t Practices (BMPs) in a tiered program. See below the descriptions of Tier One and Tier Two. Table 3. Benchmark Values for Analvtical Monitoring DisckarggCha�r °acteristics Units Benchmark Total Suspended Solids (TSS) mg /L 100 Non -Polar Oil & Grease / TPH mg /L 15 [EPA Method 1664 (SGT -HEM)] pH standard 6 - 9 Part 11 Page 6 of 10 Permit No NCS000554 PAW RiMe"MORPSWIN If: The first valid sampling results are above a benchmark value, or outside of the benchmark range, for any parameter at any outfall, Then: The permittee shall 1 Conduct a stormwater management inspection of the facility within two weeks of receiving sampling results. 2 Identify and evaluate possible causes of the benchmark value exceedence 3 identify potential and select the specific source controls, operational controls, or physical improvements to reduce concentrations of the parameters of concern, or to bring concentrations within the benchmark range 4 Implement the selected actions within two months of the ' s ction. 5. Record each instance of a Tier One response in the m ate ollut n Prevention Plan Include the date and value of the benchmark exceedence, t SCe ct► d , the personnel conducting the inspection, the selected actions, and the date the se actions were ►m lemented yM Tier Two , wIf: During the term of this permit, the first valid s pli re from two consecutive monitoring periods are above the benchmark values, or outside e rich ark range, for any specific parameter at a specific discharge outfall, Then: The permittee shall 1 Repeat all the required acts ou 'n;consecutive above in Tier One. 2 Immediately institute mo ly mon g for all parameters at every outfall where a sampling result exceeded the benchmar lue f wo consecutive samples Monthly (analytical and qualitative) monitoring shall contra three sample results are below the benchmark values or within the benchmark range 3 If no discharge occurs during the sampling period, the permittee is required to submit a monthly monitoring report indicating "No Flow" to comply with reporting requirements 4 Maintain a record of the Tier Two response in the Stormwater Pollution Prevention Plan During the term of this permit, if the valid sampling results required for the permit monitoring periods exceed the benchmark value, or are outside the benchmark range, for any specific parameter at any specific outfall on four occasions, the permittee shall notify the DWQ Regional Office Supervisor in writing within 30 days of receipt of the fourth analytical results. DWQ may but is not limited to • require that the permittee revise, increase, or decrease the monitoring frequency for the remainder of the permit, • require the permittee to install structural stormwater controls, • require the permittee to implement other stormwater control measures, or • require that the permittee implement site modifications to qualify for the No Exposure Exclusion. Part II Page 7 of 10 Permit No NCS000554 This site discharges to impaired waters experiencing problems with copper, turbidity, and excessive nutrient loading. If a Total Maximum Daily Load (TMDL) is approved for this segment of the Yadkin River and /or High Rock Lake, the permittee may be required to monitor for the pollutant(s) of concern in the future and submit results to the Division of Water Quality. The Division will consider the monitoring results in determining whether additional BMPs are needed to control the pollutant(s) of concern to the maximum extent practicable. If additional BMPs are needed to achieve the required level of control, the permittee will be required to (1) develop a strategy for implementing appropriate BMPs, and (2) submit a timetable for incorporation of those BMPs into the permitted Stormwater Pollution Prevention Plan. SECTION C: QUALITATIVE MONITORING REQ Qualitative monitoring requires a visual inspection representative outfall status and shall be performed monitoring event. Qualitative monitoring is for the Stormwater Pollution Prevention Plan (SPPP) and In the event an atypical condition is noted document the suspected cause of the con discovery. This documentation ; & be � i Table 4. Qualitative Mo outfall regardless of I m "Table 4, during the analytical evaluating the effectiveness of the w sources of stormwater pollution ler discharge outfall, the permittee shall actions taken in response to the i the SPPP. Discharge Characteristics I Wonitoring Location2 Color 0000 semi- annual SDO Odor semi - annual SDO Clarity semi- annual SDO Floating Solids semi - annual SDO Suspended Solids semi - annual SDO Foam semi - annual SDO Oil Sheen semi- annual SDO Erosion or deposition at the outfall semi - annual SDO Other obvious indicators of stormwater pollution semi - annual SDO Footnotes I Measurement Frequency Twice per year during a measurable storm event, for each year until either another permit is issued for this facility or until this permit is revoked or rescinded If at the end of this permitting cycle the permittee has submitted the appropriate paperwork for a renewal permit before the submittal deadline, the permittee will be considered for a renewal application The applicant must continue semi- annual monitoring until the renewed permit is issued See Table 2 for schedule of monitoring periods through the end of this permitting cycle Part 11 Page 8 of 10 Permit No NCS000554 2 Monitoring Location Qualitative monitoring shall be performed at each stormwater discharge outfall (SDO) regardless of representative outfall status SECTION D: ON -SITE VEHICLE MAINTENANCE MONITORING REQUIREMENTS Facilities which have any vehicle maintenance activity occurring on -site which uses more than 55 gallons of new motor oil per month when averaged over the calendar year shall perform analytical monitoring as specified below in Table 5. This monitoring shall be performed at all stormwater discharge outfalls which discharge stormwater runoff from vehicle maintenance areas, and in accordance with the schedule presented in Table 2 (Section B). All analytical monitoring shall be performed during a measurable storm event. Table 5. uiremen Vehicle Maintenance pH standard sdME 11 � ' 1 Grab SDO Non -Polar Oil & Grease / TPH [EPA Method 1664 (SGT -HEM)] mg /L Al i- ual Grab SDO Total Suspended Solids m / i- annual Grab SDO Total Rainfall4 c -s semi - annual Rain gauge New Motor Oil Usaae sj '0' semi- annual Estimate - Footnotes 1 Measurement Frequency Twi •e r ye urmg a measureable storm event, for each year until either another permit is issued for this facility runt' is permit is revoked or rescinded If at the end of this permitting cycle the permittee has submitted the appropriate paperwork for a renewal permit before the submittal deadline, the permttee will be considered for a renewal application The applicant must continue semi- annual monitoring until the renewed permit is issued See Table 2 for schedule of monitoring periods through the end of this permitting cycle 2 If the stormwater runoff is controlled by a stormwater detention pond a grab sample of the discharge from the pond shall be collected within the first 30 minutes of discharge from the pond 3 Sample Location Samples shall be collected at each stormwater discharge outfall (SDO) that discharges stormwater runoff from area(s) where vehicle maintenance activities occur 4 For each sampled measureable storm event the total precipitation must be recorded An on -site or local rain gauge reading must be recorded Monitoring results shall be compared to the benchmark values in Table 6. The benchmark values in Table 6 are not permit limits but should be used as guidelines for the permittee's Stormwater Pollution Prevention Plan (SPPP). Exceedences of benchmark values require the permitee to increase monitoring, increase management actions, increase record keeping, and /or install stormwater Best Management Practices (BMPs), as provided in Part II Section B. Part 11 Page 9 of 10 Permit No NCS000554 Table 6. Benchmark Values for Vehicle Maintenance Analytical Monitoring Discharge CharacteristicsU,nx Benchmark pH standard 6 - 9 Non -Polar Oil & Grease / TPH [EPA Method 1664 (SGT -HEM)] mg /L 15 Total Suspended Solids mg /L 100 Part 11 Page 10 of 10 Permit No NCS000554 PART IIi STANDARD CONDITIONS FOR NPDES STORMWATER INDIVIDUAL PERMITS SECTION A: COMPLIANCE AND LIABILITY Compliance Schedule The permittee shall comply with Limitations and Controls specified for stormwater discharges in accordance with the following schedule Existing Facilities already operating but applying for permit coverage for the first time The Stormwater Pollution Prevention Plan shall be developed and implemented within 12 months of the effective date of the initial permit and updated thereafter on an annual basis Secondary containment, as specified in Part 11, Section A, Paragraph 2(b) of this permit, shall be accomplished withipt,12 months of the effective date of the initial permit issuance New Facilities applying for coverage for the first time d exi in- acr previously permitted and applying for renewal under this permit The Stormwate ution Pr ion Plan shall be developed and implemented prior to the beginning of discharges from op anon of the industrial activity and be updated thereafter on an annual basis Secondary cot nm t, a specified in Part 11, Section A, Paragraph 2(b) of this permit shall be accomplished prior to eg ing =of discharges from the operation of the industrial activity Existing facilities previously permitted and controls contained in this *ther(T'r effective immediately upon isPollution Prevention Plan for the effective date of the initi Vcej thereafter on an annual basO Sea shall be accomplished pr A to the Duty to Comply AKAppI&O renewal All requirements, conditions, limitations, Je t ne P elements in this permit renewal) shall become • ificate of Coverage New elements of the Stormwater re al shall be developed and implemented within 6 months of Pf Coverage issued pursuant to this General Permit and updated ,ontamment, as specified in Part III, Paragraph 2(b) of this permit mg of discharges from the operation of the industrial activity The permittee must comply with all conditions of this individual permit Any permit noncompliance constitutes a violation of the Clean Water Act and is grounds for enforcement action, for permit termination, revocation and reissuance, or modification, or denial of a permit upon renewal application The permittee shall comply with standards or prohibitions established under section 307(a) of the Clean Water Act for toxic pollutants within the time provided in the regulations that establish these standards or prohibitions, even if the permit has not yet been modified to incorporate the requirement b The Clean Water Act provides that any person who violates a permit condition is subject to a civil penalty not to exceed $25,000 per day for each violation Any person who negligently violates any permit condition is subject to criminal penalties of $2,500 to 25,000 per day of violation, or imprisonment for not more than 1 year, or both Any person who knowingly violates permit conditions is subject to criminal penalties of $5,000 to $50,000 per day of violation, or imprisonment for not more than 3 years, or both Also, any person who violates a permit condition may be assessed an administrative penalty not to exceed $10,000 per violation with the maximum amount not to exceed $125,000 [Ref Section 309 of the Federal Act 33 USC 1319 and 40 CFR 122 41(a) ] Part III Page 1 of 8 Permit No NCS000554 Under state law, a daily civil penalty of not more than ten thousand dollars ($10,000) per violation may be assessed against any person who violates or fails to act in accordance with the terms, conditions, or requirements of a permit [Ref NC General Statutes 143 -215 6A] Any person may be assessed an administrative penalty by the Director for violating section 301, 302, 306, 307, 308, 318 or 405 of the Act, or any permit condition or limitation implementing any of such sections in a permit issued under section 402 of the Act Administrative penalties for Class I violations are not to exceed $10,000 per violation, with the maximum amount of any Class I penalty assessed not to exceed $25,000 Penalties for Class ii violations are not to exceed $10,000 per day for each day during which the violation continues, with the maximum amount of any Class 11 penalty not to exceed $125,000 Duty to Mitigate The permittee shall take all reasonable steps to minimize or pre ny discharge in violation of this individual permit which has a reasonable likelihood of adv�rse a ting huynan health or the environment 4 Civil and Criminal Liability Except as provided in Part III, Section C of this pe t ega ing ypassmg of stormwater control facilities, nothing in this individual permit shall be constru MR. ve t permittee from any responsibilities, liabilities, or penalties for noncompliance purs nt t G 43 -215 3, 143 -215 6A, 143 -215 613, 143- 215 6C or Section 309 of the Federal Act, 3 S 319. Furthermore, the permittee is responsible for consequential damages, such as is loll en t he responsibility for effective compliance may be temporarily suspended Oil and Hazardous Substance L - ili Nothing in this individual rmit shal construed to preclude the institution of any legal action or relieve the permittee from any rep nsibilit liabilities, or penalties to which the permittee is or may be subject to under NCGS 143 -215 75 t se .. ection 311 of the Federal Act, 33 USC 1321 6 Property Rights The issuance of this individual permit does not convey any property rights in either real or personal property, or any exclusive privileges, nor does it authorize any injury to private property or any invasion of personal rights, nor any infringement of Federal, State or local laws or regulations 7 Severability The provisions of this individual permit are severable, and if any provision of this individual permit, or the application of any provision of this individual permit to any circumstances, is held invalid, the application of such provision to other circumstances, and the remainder of this individual permit, shall not be affected thereby 8 Duty to Provide Information The permittee shall furnish to the Director, within a reasonable time, any information which the Director may request to determine whether cause exists for modifying, revoking and reissuing, or terminating the permit issued pursuant to this individual permit or to determine compliance with this individual permit The permittee shall also furnish to the Director upon request, copies of records required to be kept by this individual permit 9 Penalties for Tampering Part III Page 2 of 8 Permit No NCS000554 The Clean Water Act provides that any person who falsifies, tampers with, or knowingly renders inaccurate, any monitoring device or method required to be maintained under this individual permit shall, upon conviction, be punished by a fine of not more than $10,000 per violation, or by imprisonment for not more than two years per violation, or by both If a conviction of a person is for a violation committed after a first conviction of such person under this paragraph, punishment is a fine of not more that $20,000 per day of violation, or by imprisonment of not more than 4 years, or both 10 Penalties for Falsification of Reports The Clean Water Act provides that any person who knowingly makes any false statement, representation, or certification in any record or other document submitted or required to be maintained under this individual permit, including monitoring reports or reports of compliance or nonjwripliance shall, upon conviction, be punished by a fine of not more than $10,000 per violation, or b iwTsonment for not more than two years per violation, or by both A MR, n SECTION B: GENERAL CONDITIONS i Individual Permit Expiration The permittee is not authorized to d►scharg er a ex ration date In order to receive automatic authorization to discharge beyond the a t►o . e permittee shall submit forms and fees as are required by the agency autho a to i ue erm later than 180 days prior to the expiration date Any permittee that has not requeste en a le t 180 days prior to expiration, or any permittee that does not have a permit after the exp►rat►o d n quested renewal at least 180 days prior to expiration, will be subjected to enforcement pr dures s pr vided in NCGS § 143 -215 36 and 33 USC 1251 et seq 2 Transfers This permit is not transfer o any person except after notice to and approval by the Director The Director may require modification or revocation and re►ssuance of the permit to change the name and incorporate such other requirements as may be necessary under the Clean Water Act The Permittee is required to notify the Division in writing in the event the permitted facility is sold or closed. 3 Signatory Requirements All applications, reports, or information submitted to the Director shall be signed and certified All applications to be covered under this individual permit shall be signed as follows (1) In the case of a corporation by a principal executive officer of at least the level of vice - president, or his duly authorized representative, if such representative is responsible for the overall operation of the facility from which the discharge described in the permit application form originates, (2) In the case of a partnership or limited partnership by a general partner, (3) In the case of a sole proprietorship by the proprietor, (4) In the case of a municipal, state, or other public entity by a principal executive officer, ranking elected official, or other duly authorized employee Part I I I Page 3 of 8 4 Permit No NCS000554 All reports required by the individual permit and other information requested by the Director shall be signed by a person described above or by a duly authorized representative of that person A person is a duly authorized representative only if (1) The authorization is made in writing by a person described above, (2) The authorization specified either an individual or a position having responsibility for the overall operation of the regulated facility or activity, such as the position of plant manager, operator of a well or well field, superintendent, a position of equivalent responsibility, or an individual or position having overall responsibility for environmental matters for the company (A duly authorized representative may thus be either a named individual or any individual occupying a named position ), and (3) The written authorization is submitted to the Any person signing a document under certification "I certify, under penalty of law, that this direction or supervision in accordance v properly gather and evaluate the inform, persons who manage the system, or t information, the information subm i and complete I am aware that a ar including the possibf fi es d i on shall make the following all attachments were prepared under my de Wned to assure that qualified personnel tt Based on my inquiry of the person or ectly responsible for gathering the st of my knowledge and belief, true, accurate, penalties for submitting false information, for knowing violations " The issuance of this mdrvi al permit &s not prohibit the Director from reopening and modifying the individual permit, revoke Wndreis mg the indivi dual permit, or terminating the individual permit as allowed by the laws, rule ions contained in Title 40, Code of Federal Regulations, Parts 122 and 123, Title 15A of the na Administrative Code, Subchapter 2H 0100, and North Carolina General Statute 143 -215 1 et al Permit Actions The permit may be modified, revoked and reissued, or terminated for cause The notification of planned changes or anticipated noncompliance does not stay any individual permit condition SECTION C: OPERATION AND MAINTENANCE OF POLLUTION CONTROLS Proper Operation and Maintenance The permittee shall at all times properly operate and maintain all facilities and systems of treatment and control (and related appurtenances) which are installed or used by the permittee to achieve compliance with the conditions of this individual permit Proper operation and maintenance also includes adequate laboratory controls and appropriate quality assurance procedures This provision requires the operation of back -up or auxiliary facilities or similar systems which are installed by a permittee only when the operation is necessary to achieve compliance with the conditions of this individual permit Need to Halt or Reduce Not a Defense Part III Page 4 of 8 Permit No NCS000554 It shall not be a defense for a permittee in an enforcement action that it would have been necessary to halt or reduce the permitted activity in order to maintain compliance with the condition of this individual permit 3 Bypassing of Stormwater Control Facilities Bypass is prohibited and the Director may take enforcement action against a permittee for bypass unless a Bypass was unavoidable to prevent loss of life, personal injury or severe property damage, and b There were no feasible alternatives to the bypass, such as the use of auxiliary control facilities, retention of stormwater or maintenance during normal periods of equipment downtime or dry weather This condition is not satisfied if adequate backup controls should have been installed in the exercise of reasonable engineering judgment to prevent a bypass which occurred during normal periods of equipment downtime or preventive maintenance, mid c The permittee submitted notices as required If the Director determines that it will meet the three co anticipated bypass after considering its adverse effects SECTION D: MONITORING AND RECORDS Representative Sampling of this permit the Director may approve an Samples collected and measur en to equired herein, shall be characteristic of the volume and nature of the permitted dischar Ana is mpling shall be performed during a measureable storm event Samples shall be tak on a d an time that is characteristic of the discharge All samples shall be taken before the dischargLifed or is ed by any other waste stream, body of water, or substance Monitoring points as spe n th er mit shall not be changed without notification to and approval of the Director 2 Recording Results For each measurement, sample, inspection or maintenance activity performed or collected pursuant to the requirements of this individual permit, the permittee shall record the following information a The date, exact place, and time of sampling, measurements, inspection or maintenance activity, b The mdividual(s) who performed the sampling, measurements, inspection or maintenance activity, c The date(s) analyses were performed, d The individual(s) who performed the analyses, e The analytical techniques or methods used, and f The results of such analyses 3 Flow Measurements Where required, appropriate flow measurement devices and methods consistent with accepted scientific practices shall be selected and used to ensure the accuracy and reliability of measurements of the volume of monitored discharges Part I I i Page 5 of 8 Permit No NCS000554 4 Test Procedures Test procedures for the analysis of pollutants shall conform to the EMC regulations published pursuant to NCGS 143 -215 63 et seq, the Water and Air Quality Reporting Acts, and to regulations published pursuant to Section 304(g), 33 USC 1314, of the Federal Water Pollution Control Act, as Amended, and Regulation 40 CFR 136 To meet the intent of the monitoring required by this individual permit, all test procedures must produce minimum detection and reporting levels and all data generated must be reported down to the minimum detection or lower reporting level of the procedure Representative Outfall If a facility has multiple discharge locations with substantially required to be sampled, the permittee may petition the Directc established that the stormwater discharges are substanttmaye dE remen representative outfall status, then sampling requi Records Retention Visual monitoring shall be documented and Pollution Prevention Plan Copies of analyi permittee shall retain records of all monitor records and all original strip chart recor i reports required by this indiv u` a it measurement, report or applic 'on. hi Inspection and Entry stormwater discharges that are - sentative outfall status If it is I the ermittee is granted nedta reduced number of outfalls dt the facility along with the Stormwater Its shall also be maintained on -site The Waatf n, including all calibration and maintenance us monitoring instrumentation, and copies of all t least 5 years from the date of the sample, may be extended by request of the Director at any time The permittee shall allo4M. Direct , or an authorized representative (including an authorized contractor acting as a representativ ector), or in the case of a facility which discharges through a municipal separate storm sewer syauthorized representative of a municipal operator or the separate storm sewer system receiving the discharge, upon the presentation of credentials and other documents as may be required by law, to, a Enter upon the permittee's premises where a regulated facility or activity is located or conducted, or where records must be kept under the conditions of this individual permit, b Have access to and copy, at reasonable times, any records that must be kept under the conditions of this individual permit, c Inspect at reasonable times any facilities, equipment (including monitoring and control equipment), practices, or operations regulated or required under this individual permit, and d Sample or monitor at reasonable times, for the purposes of assuring individual permit compliance or as otherwise authorized by the Clean Water Act, any substances or parameters at any location SECTION E: REPORTING REQUIREMENTS Discharge Monitoring Reports Samples analyzed in accordance with the terms of this permit shall be submitted to the Division on Discharge Monitoring Report forms provided by the Director Submittals shall be delivered to the Part III Page 6 of 8 4 Permit No NCS000554 Division no later than 30 days from the date the facility receives the sampling results from the laboratory. When no discharge has occurred from the facility during the report period, the permittee is required to submit a discharge monitoring report, within 30 days of the end of the six -month sampling period, giving all required information and indicating "NO FLOW" as per NCAC T15A 02B 0506 The permittee shall record the required qualitative monitoring observations on the SDO Qualitative Monitoring Report form provided by the Division, and shall retain the completed forms on site Visual monitoring results should not be submitted to the Division, except upon DWQ's specific requirement to do so Submitting Reports Two signed copies of Discharge Monitoring Reports ( Central File Division of Water 1617 Mail Service Raleigh, North Caro Addresses for each RO and the counties a http: / /portal.ncdenr.org /web /wq /home/ Visual monitoring results should not be u specifically requested by DWA 4 Availability of Reports submitted to Jean be found here shall retain the completed originals on site aonal Offices or Central Files unless Except for data determine o be confl' atial under NCGS 143 -215 3(a)(2) or Section 308 of the Federal Act, 33 USC 1318, all re tinegly d in accordanc e with the terms shall be available for public inspection at the offices of the Dive r Quality As required by the Act, analytical data shall not be considered confidential making any false statement on any such report may result in the imposition of criminal penalties as provided for in NCGS 143 -215 6B or in Section 309 of the Federal Act Non - Stormwater Discharges If the storm event monitored in accordance with this Individual Permit coincides with a non - stormwater discharge, the permittee shall separately monitor all parameters as required under the non - stormwater discharge permit and provide this information with the stormwater discharge monitoring report Planned Changes The permittee shall give notice to the Director as soon as possible of any planned changes at the permitted facility which could significantly alter the nature or quantity of pollutants discharged This notification requirement includes pollutants which are not specifically listed in the Individual Permit or subject to notification requirements under 40 CFR Part 122 42 (a) Anticipated Noncompliance The permittee shall give notice to the Director as soon as possible of any planned changes at the permitted facility which may result in noncompliance with the Individual Permit requirements Part 1 1 1 Page 7 of 8 Permit No NCS000554 spills The permittee shall report to the local DWQ Regional Office, within 24 hours, all significant spills as defined in Part VI of this permit Additionally, the permittee shall report spills including any oil spill of 25 gallons or more, any spill regardless of amount that causes a sheen on surface waters, any oil spill regardless of amount occurring within 100 feet of surface waters, and any oil spill less than 25 gallons that cannot be cleaned up within 24 hours Bypass Anticipated bypass If the permittee knows in advance of the need for a bypass, it shall submit prior notice, if possible at least ten days before the date of the bypass, including an evaluation of the anticipated quality and affect of the bypass Unanticipated bypass The permittee shall submit notice wit n 24 hours of becoming aware of an unanticipated bypass Adoov Twenty -four Hour Reporting The permittee shall report to the central office or the a n e regional office any noncompliance which may endanger health or the environment Any info on s MI. provided orally within 24 hours from the time the permittee became aware of the circu ce . A itten submission shall also be provided within 5 days of the time the permittee becom aw th ircumstances The written submission shall contain a d ipti noncompliance, and its causes, the period of noncompliance, including ex tes d es, if the noncompliance has not been corrected, the anticipated time compliance is pe ed co mue, and steps taken or planned to reduce, eliminate, and prevent reoccurrence of the non ph ce The Director may waive twritten ra$a"`it on a case -by -case basis if the oral report has been received within 24 hours A J 10 Other Noncompliance The permittee shall report all instances of noncompliance not reported under 24 hour reporting at the time monitoring reports are submitted I I Other Information Where the permittee becomes aware that it failed to submit any relevant facts in a Notice of Intent to be covered under this Individual Permit or in any report to the Director, it shall promptly submit such facts or information Part III Page 8 of 8 NCS000554 PART IV LIMITATIONS REOPENER This individual permit shall be modified or alternatively, revoked and reissued, to comply with any applicable effluent guideline or water quality standard issued or approved under provisions of the Clean Water Act, if the effluent guideline or water quality standard so issued or approved Contains different conditions or is otherwise more stringent than any effluent limitation in the individual permit, or b Controls any pollutant not limited in the individual permit The individual permit as modified or reissued under this paragrap} fish als contain ny other requirements in the Act then applicable PART V ADMINISTERING AND M fI%) CE MONITORING FEE REQUI + �S A The permittee must pay the administering and co pYianC�ormg fee within 30 (thirty) days after being billed by the Division Failure to pay the fee m ely r m cc r ance with 15A NCAC 2H 0105(b)(4) may cause this Division to inmate action to revoke th id I PA I DEFINITIONS Act See Clean Water Act Allowable Non - Stormwater Discharges This permit regulates stormwater discharges Non - stormwater discharges which shall be allowed in the stormwater' conveyance system are (a) All other discharges that are authorized by a non- stormwater NPDES permit (b) Uncontaminated groundwater, foundation drains, air - conditioner condensate without added chemicals, springs, discharges of uncontaminated potable water, waterline and fire hydrant flushmgs, water from footing drains, flows from riparian habitats and wetlands (c) Discharges resulting from fire - fighting or fire - fighting training Best Management Practices (BMPs) 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 More information on BMPs can be found at http / /cfpub epa gov /npdes /stormwater /menuofbmps /index cfm 4 Bypass A bypass is the known diversion of stormwater from any portion of a stormwater control facility including the collection system, which is not a designed or established operating mode for the facility Bulk Storage of Liquid Products 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 Parts IV, V and VI Page 1 of 4 Permit No NCS000554 6 Certificate of Coverage The Certificate of Coverage (COC) is the cover sheet which accompanies the Individual Permit upon issuance and lists the facility name, location, receiving stream, river basin, effective date of coverage under the permit and is signed by the Director 7 Clean Water Act The Federal Water Pollution Control Act, also known as the Clean Water Act (CWA), as amended, 33 USC 1251, et seq 8 Division or DWQ The Division of Water Quality, Department of Environment and Natural Resources 9 Director The Director of the Division of Water Quality, the 10 EMC 12 13 The North Carolina Environmental Management Grab Sample An individual sample collected instant qualitatively) must be taken within the Hazardous Substance Any substance designated un Landfill A disposal facility or pat treatment facility, a surfi a surface storage facility ssi 1ples that will be analyzed (quantitatively or discharge 6 pursuant to Section 311 of the Clean Water Act facility where waste is placed in or on land and which is not a land nt, an infection well, a hazardous waste long -term storage facility or 14 Measurable Storm Event A measurable storm event is a storm event that results in an actual discharge from the permitted site outfall The previous measurable storm event must have been at least 72 hours prior The 72 -hour storm interval may not apply if the permttee is able to document that a shorter interval is representative for local storm events during the sampling period, and obtains approval from the local DWQ Regional Office Two copies of this information and a written request letter shall be sent to the local DWQ Regional Office After authorization by the DWQ Regional Office, a written approval letter must be kept on site to the permtttee's SPPP 15 Municipal Separate Storm Sewer System A stormwater collection system within an incorporated area of local self - government such as a city or town 16 No Exposure A condition of no exposure means that all industrial materials and activities are protected by a storm resistant shelter or acceptable storage containers to prevent exposure to rain, snow, snowmelt, or runoff Industrial materials or activities include, but are not limited to, material handling equipment or activities, industrial machinery, raw materials, intermediate products, by- products, final products, or waste products DWQ may grant a No Exposure Exclusion from NPDES Stormwater Permitting requirements only if a facility complies with the terms and conditions described in 40 CFR § 122 26(g) 17 Notice of Intent Part VI Page 2 of 4 Pages Permit No NCS000554 The state application form which, when submitted to the Division, officially indicates the facility's notice of intent to seek coverage under an Individual Permit 18 Permittee The owner or operator issued a certificate of coverage pursuant to this Individual Permit 19 Point Source Discharge of Stormwater 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 20 Representative Outfall Status When it is established that the discharge of stormwater runoff from a single outfall is representative of the discharges at multiple outfalls, the DWQ may grant representative ougall status Representative outfall status allows the permittee to perform analytical monitoring at rced number of outfalls 21 Secondary Containment Spill containment for the contents of the single largest freeboard to allow for the 25 -year, 24 -hour storm ever 22 Section 313 Water Prioritv Chemical A chemical or chemical category which a Is listed in 40 CFR 372 65 pure Reauthorization Act (SARA) c to -Know Act of 1986 A structure plus sufficient 3 of Title 111 of the Superfund Amendments and the Emergency Planning and Community Right- [s present at or above a old�l Weat a facility subject to SARA tale [I[, Section 313 reporting requirements, and Meets at least one e foI ,win criteria (1) Is listed appendi of 40 CFR part 122 on Table II (organic priority pollutants), Table III (ce ' metals yanides, and phenols) or Table IV (certain toxic pollutants and (2) Is listed'RFi azardous substance pursuant to section 31 I (b)(2)(A) of the CWA at 40 CFR 116 4, or (3) Is a pollutant for which EPA has published acute or chronic water quality criteria 23 Severe Property Damage Means substantial physical damage to property, damage to the control facilities which causes them to become inoperable, or substantial and permanent loss of natural resources which can reasonably be expected to occur in the absence of a bypass Severe property damage does not mean economic loss caused by delays in production 24 Significant Materials 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 Tale III of SARA, fertilizers, pesticides, and waste products such as ashes, slag and sludge that have the potential to be released with stormwater discharges 25 Significant Spills 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) Part VI Page 3 of 4 Pages Permit No NCS000554 26 Stormwater Dischari?e Outfall (SDO) The point of departure of stormwater from a discernible, confined, or discrete conveyance, including but not limited to, storm sewer pipes, drainage ditches, channels, spillways, or channelized collection areas, from which stormwater flows directly or indirectly into waters of the State of North Carolina 27 Stormwater Runoff The flow of water which results from precipitation and which occurs immediately following rainfall or as a result of snowmelt 28 Stormwater Associated with Industrial Activi 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 activs defined in 40 CFR 122 26(b)(14) The term does not include discharges from facilities or activitie,&Kded from the NPDES program 29 Stormwater Pollution Prevention Plan A comprehensive site - specific plan which details mea is based on an evaluation of the pollution potential of 30 Total Maximum Daily Load (TMDL) TMDLs are written plans for attaining and water body and pollutant (A list of approN http : / /h2o.enr.state.nc.us /tmdl /) 31 Toxic Pollutant Any pollutant listed as toxic 32 33 34 reduce stormwater pollution and quality standards, in all seasons, for a specific state of North Carolina can be found at a)(1) of the Clean Water Act Vehicle rehabilitation, m c anical r 2ftrs, painting, fueling, lubrication, vehicle cleaning operations, or airport deicing operation Visible Sedimentation 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 25 -year, 24 hour storm event The maximum 24 -hour precipitation event expected to be equaled or exceeded, on the average, once in 25 years Part VI Page 4 of 4 Pages