The URL can be used to link to this page

Home My WebLink AboutMarshall Steam Station (12)NCS000548 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY PERMIT TO DISCHARGE STORMWATER UNDER THE In compliance with the provisions of North Carolinaral STWI43-215.1, other lawful standards and regulations promulgated and adopted b orth Carolina Environmental Management Commission, and the Federal Water lut' " n ntrol Act, as amended, Duke En ar inas, LLC is hereby authori ' t . di e stormwater from a facility located at �ar all Steam Station 83 ast NC Highway 150 Terrell, NC Catawba County to receiving waters designated as the Catawba River, a class WS-IV,B; CA stream in the Catawba 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 September 1, 2011. This permit and the authorization to discharge shall expire at midnight on August 31, 2016. Signed this day August 13, 2011. for Coleen H. Sullins, Director Division oC Water Quality By the Authority of the Environmental Management Commission PART I Section A: Section B: Section C: PART II Section A: Section B: Section C: Section D: PART III Section A Section B TABLE OF CONTENTS INTRODUCTION Individual Permit Coverage Permitted Activities Location T MONITORIN DISCHARGE Stormwatf Analytical Qualitative On -Site V Permit No NCS000548 PERMITTED STANDARD CNA1MTIONS FOR NPDES STORMWATER INDIVIDUAL PERMITS 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 General Conditions 1. Individual Permit Expiration 2. T -ansfers Permit No NCS000548 3. Signatory Requirements 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 Facile Section D: Monitoring and Records 1. Representative Sampling 2. Recording Results 3. Flow Measurements 4 Test Procedures 5. Representat&,n Iji 6. Record R 7 Inspectio a T Section E: ReportingVing 1. Diitoring Reports 2 Suports 3. Availability of Reports 4. Non-Stormwater Discharges 5. Planned Changes 6. Anticipated Noncompliance 7. Bypass 8. Twenty-four Hour Reporting 9. Other Noncompliance 10. Other Information PART IV LIMITATIONS REOPENER PART N' ADMINISTERING AND COMPLIANCE MONITORING FEE REQUIREMENTS PART VI DEFINITIONS 11 Permit No NCS000548 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 Exposure Exclusion from NPDES stormwater discharge permit requirements. Any owner or operator wishing t obtain a No Exposure Certification must submit a No Exposure Certification O to the Division; must receive approval by the Division; must maintain no exposure ndt ' - n nles authorized to discharge under a valid NPDES stormwater permit; and must fo e Exposure Exclusion once every five (5) years. SECTION B: PERMITTED ACTIVITIE Until this permit expires or is mo ified evoke permittee is authorized to discharge stormwater to the surface Ovate o ro a or separate storm sewer system that has been adequately treated and managed t ac r c with the terms and conditions of this individual permit. All stormwater dischar - it 11 i accordance with the conditions of this permit. Any other point source disc ge to face waters of the state is prohibited unless it is an allowable non-stormwater '', I or, is covered by another permit, authorization, or approval. The stormwater discharges a ed 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. Pant Page Ioi_' SECTION C: LOCATION MAP Permit No NCS000548 Wf 7A, < W- 5111 FPI 'Al i -EEE 1.4 T? T, I "3d 4 11 ";Rl Ot A NCS000548 IJ ti Mcp 1 Duke Energy Carolinas, LLC Marshall Steam Station Lab tude: 350 35' 50" N Longitude: 800 5755" W County, Car3wba Reca m ng Stream: Catawba River (Lake Not man) Stream Cass SW -!VB, CA Sub-1)asin - 03-0c' 32 (latawba Rivet Basir P,,, - I PaL,,, 2 of 2 Facility Location Permit No NCS000548 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: Site Plan. The site plan shall provide a description of the ysical facility and the potential pollutant sources which may be expected t • tribute to contamination of stormwater discharges. The site plan shall corn t o 1 wi (a) A general location map (USGS quadr',Bkmap or appropriately drafted equivalent map), showing the facilit s to k in relation to transportation routes and surface waters, the n o e r eiving water(s) to which the stormwater outfall(s) di, storm sewer system, the waters, and accurate lati general location4 a (ol receiving water is i p located in a wat s e parameter(s) fcoi North Carol' 's 3 http://h2o.er.s North Carolina o7enicipality scharge is to a municipal separate and the ultimate receiving of the point(s) of discharge. The ely the site map) shall identify whether each the state's 303(d) list of impaired waters) or is h a TMDL has been established, and what the List can be found here: c.us/tmdl/General_303d.htm#Downloads documents can be found here. httn://h2o.enr.state.ne.us/tmdl/TMDL list.htm#Final TMDLs. (b) 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 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 of leaks of pollutants that have occurred at the facility during the three (3) previous years and any corrective actions taken to mitigate spill impacts. Part II 'a e I of 11 Permit No NCS000548 (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 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 tec al I , - ono 'c feasibility of changing the methods of operations and/or stor e p ti s t o-. minate or reduce exposure of materials and processes to stormwa r. herev practical, the permittee shall prevent exposure of all storage areas, a ri handling operations, and manufacturing or fueling operatio . , are here elimination of exposure is not practical, the stormwater in ag n "n shall document the feasibility of diverting the stormwater run a y fr I in areas of potential contamination. (b) SecondaryCont ' nt ' e ire is and Records. Secondary containment is required for: bulk or e li id materials; storage in any amount of Section 313 of Title III of up f d Amendments and Reauthorization Act (SARA) water priority c mical storage in any amount of hazardous substances, in order to prev leaks d spills from contaminating stormwater runoff. A table or summary f tanks and stored materials and their associated secondary containment a all be maintained. 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 closed with a locking mechanism), and any stormwater that accumulates in the containment area shall 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 the material stored within the containment area. 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. Pa, t 1! I,�.ge 2 of I I Permit No NCS000548 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 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 Housekee g o m preventative maintenance and good housekeeping progra ha e ve d The program shall list all stormwater control systems, stormwater di c e out s, all on-site and adjacent surface waters and wetlands, industrial activi ( ncluding material storage areas, material handling areas, disposal areas, pr les are ading and unloading areas, and haul roads), all drainage features and st ct , _ existing structural BMPs. The program shall establish schedules of 4 p io , maintenance, and housekeeping activities of stormwater control s st s 1 as facility equipment, facility areas, and facility systems that pre n p ten .al ormwater exposure or stormwater pollution. Inspection of material ha n in ar s d regular cleaning schedules of these areas shall be incorporated into the Ti ely compliance with the established schedules for inspections, maintena , and keeping shall be recorded in writing and maintained in the SPPP. 5. Employee Training. Wn g programs shall be developed and training provided at a minimum on an annual basis for facility personnel with responsibilities for- spill response and cleanup, preventative maintenance activities, and for 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, and their annual training shall be documented by the 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 re -certification that the stormwater outfalls have been evaluated for the piesence of non-stormwater discharges Each annual update shall include a re-evaluat,on of the Part i' Page 3 o; ! 1 Z Permit No NCS000548 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 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 III, Standard Conditions, Section B, Paragraph 5) to the Director that the changes have been made. Facility Inspections. Inspections of the facility and all stormwater systems shall occur as part of the Preventative Maintenance and Good Housekee ing Program at a minimum on a semi-annual schedule, once during the first half of ear (January to June), and once during the second half (July to December), wit 1 sty days eparating inspection dates (unless performed more frequently than m' ann lFl4 These facility inspections are different from, and in addition to, the stor w er disc ge characteristic monitoring required in Part II B, C and D of this permit. Implementation. The permittee shall i 'le tit' 'Plan. Implementation of the Plan shall include documentation of all ito g, easurements, inspections, maintenance Wtedincluding the log of the sampling data and with the industrial activities, including umentation shall be kept on-site for a period of activities, and training provided t of actions taken to imt�le � �i - t _ if., vehicle maintenanc five years and mad immediately upon -tor or the Director's authorized representative Part -1 Page 4 0 , 1 Permit No NCS000548 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 representative 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 representative storm event is a storm event that measures greater than 0 1 inches of rainfall The time between this storm event and the previous storm event measuring greater than 0 1 inches must be at least 72 hours A single storm event may have a period of no precipitation of up to 10 hours For example, if it rains but stops before producing any collectable discharge, a sample may be collected if the next rain producing a discharge begins within 10 hours Q Table 1. Analvtical Monitoring Requirem Pep t,Sample� Sample , Characteric Units e Locat-1140 CFR Part 423 Appendix A• Grab SDO 13 Priority Pollutant Metalsµg/1 (Ag, As, Be, Cd, Cr, Cu, Hg, Ni, Pb, Sb, Se, Tl, Zn) 4 4;1P Al semi-annual Grab SDO B / semi-annual Grab SDO COD AL nj11 semi-annual Grab SDO TSS m /1 semi-annual Grab SDO Sulfate mg/1 semi-annual Grab SDO Oil and Grease (O&G) mg/1 semi-annual Grab SDO H standard semi-annual Grab SDO Total Rainfalls inches semi-annual Rain Gauge - Footnotes I Measurement Frequency Twice per year during a representative 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 2 If the stormwater runoff is controlled by a stormwater detention pond, a grab sample of tie discharge from the pond 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 NOTE SDO SWO09 at this plant site (which also serve as outfalls 003 NPDES wastewater permit NC0004987) should be sampled for these parameters and must be reported in accordance with Part III, Section E 4 (Repoi ting Requirements -- Non-Stormwater Discharges) Pai 11 Page 5, 1 1 Permit No NCS000548 Mercury shall be analyzed by EPA Low-level detection method 1631 E This method also requires a field blank be analyzed A benchmark does not apply, however, values above 0.012 lag/1 should be noted on annual SDO DMR reports to the Regional Office For each sampled representative 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 each sample date unless monthly monitoring has been instituted under a Tier Two response. Table 2. Monitoring Schedule Footnotes 1 Maintain semi-annual monitor during rmrt renewal process The applicant must continue semi-annual monitoring until the renewed e l it is ed 2 If no discharge occurs during e s ing period, the permittee must submit a monitoring report indicating "No Flow" within 30 days of the end of the six-month sampling period The permittee shall report the analytical results from the first sample with valid results within the monitoring period. In addition, a separate signed Annual Summary DMR copy shall be submitted to the local DWQ Regional Office (RO) by March 1 of each year. The permittee shall compare monitoring results to the benchmark values in Table 3. The benchmark values in Table 3 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 permittee to increase monitoring, increase management actions, increase record keeping, and/or install stormwater Best Management Practices (BMPs) in a tiered program See below the descriptions of Tier One and Tier Two. Part II P�,_, 6 of 1 1 Year 1 — Period 1 1 September 1 February 29, 2012 Year 1— Period 2 2 MaA-h 19M August 31, 2012 Year 2 — Period 1 3 Sep m r 1, � February 28, 2013 Year 2 — Period 2 4 rc , 201 August 31, 2013 Year 3 — Period 1 5 Se em er 2013 February 28, 2014 Year 3 — Period 2 6 sh , 2014 August 31, 2014 Year 4 — Period 1 7 j gptWer 1, 2014 February 28, 2015 Year 4 — Period 2 8 rch 1, 2015 August 31, 2015 Year 5 — Period 1 4W lWptember 1, 2015 February 28, 2016 Year 5 — Period 2 0 March 1, 2016 August 31, 2016 Footnotes 1 Maintain semi-annual monitor during rmrt renewal process The applicant must continue semi-annual monitoring until the renewed e l it is ed 2 If no discharge occurs during e s ing period, the permittee must submit a monitoring report indicating "No Flow" within 30 days of the end of the six-month sampling period The permittee shall report the analytical results from the first sample with valid results within the monitoring period. In addition, a separate signed Annual Summary DMR copy shall be submitted to the local DWQ Regional Office (RO) by March 1 of each year. The permittee shall compare monitoring results to the benchmark values in Table 3. The benchmark values in Table 3 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 permittee to increase monitoring, increase management actions, increase record keeping, and/or install stormwater Best Management Practices (BMPs) in a tiered program See below the descriptions of Tier One and Tier Two. Part II P�,_, 6 of 1 1 Permit No NCS000548 Table 3. Benchmark Values for Analytical Monitoring Di cliarg Character stics 'A f Units Benchmark =- Aluminum mg/l 0.75 Antimony mg/l 0.09 Arsenic mg/l 0.36 Beryllium mg/1 0.07 Boron mg/1 Cadmium mg/1 001 n Chromium mg/lLz'1 Copper mg/l 0.007 Lead mg/l 0.03 Mercury µg/1 N/A Nickel mf Amoo"0.26 Selenium 0.056 Silver / 0.001 Thallium mg/l N/A Zinc mgA 0.067 COD mg/1 120 TSS mg/l 100 Sulfate mg/1 500 O&G mg/l 30 pH (see footnote 1) standard 6 - 9 1 Footnotes 1 If pH values outside this range are recorded in sampled stormwater discharges, but ambient rainfall data indicate precipitation pH levels are within + 0.1 standard units of the measured discharge values or lower, then the lower threshold of this benchmark range does not apply Readings from anon -site or local rain gauge (or local precipitation data) must be documented to demonstrate background concentrations were below the benchmark pH range Part II PaL 7 of; I Permit No NCS000548 's xTierQne jWj U— lf. 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 parame rs concern, or to bring concentrations to within the benchmark range. AO 4. Implement the selected actions within two mo f th 'ns ection. 5. Record each instance of a Tier One response i e rmwater Pollution Prevention Plan. Include the date and value of the benchmar ex , ed , the inspection date, the personnel conducting the inspection, the selected io d"tie date the selected actions were implemented. If. During the term of this pVthenchtmark lid sampling results from two consecutive monitoring periods are a values, or outside of the benchmark range, for any s ectfic arameter at a s eoutfall, Then: The permittee shall: 1. Repeat all the required actions outlined above in Tier One. 2. Immediately institute monthly monitoring for all parameters (except mercury) at every outfall where a sampling result exceeded the benchmark value for two consecutive samples. Monthly (analytical and qualitative) monitoring shall continue until three consecutive sample results are below the benchmark values, or within the benchmark range, for all parameters at that outfall. 3. If no discharge occurs during the sampling period, the permittee is required to submit a monthly monitoring report indicating "No Flow." 4. Maintain a record of the Tier Two response in the Stormwater Pollution Prevention Plan. P n -t I1 Pap' o! 1 1 Permit No NCS000548 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 Mooresville 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 increase or decrease the monitoring frequency for the remainder of the permit; • Work with the permittee to develop alternative re • Require the permittee to install structural storw It • Require the permittee to implement other sto • Require that the permittee implement site m4M Exclusion. � r-ormeasures; or to qualify for the No Exposure SECTION C: QUALITATIVE ?44 M REQUIREMENTS Qualitative monitoring requires is i Ltion of each stormwater outfall regardless of representative outfall status a shall b - rformed as specified in Table 4, during the analytical monitoring event. [If analyt' • mon' ring is not required, the permittee still must conduct semi- annual qualitative monitorin .] itative monitoring is for the purpose of evaluating the effectiveness of the Stormwater ollution Prevention Plan (SPPP) and assessing new sources of stormwater pollution. In the event an atypical condition is noted at a stormwater discharge outfall, the permittee shall document the suspected cause of the condition and any actions taken in response to the discovery. This documentation will be maintained with the SPPP. Part 1; "age 9 of 1 I Table 4. Qualitative Monitoring Requirements Discharge Characteristics Fre l5encyl "�� Monitoring ,' Sample locaon3tiiI Location?` Color 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 silo Erosion or deposition at the semi-annual ;4%6� outfall 1* Other obvious indicators semi-annual SDO of stormwater pollution Footnotes I Measurement Frequency Twice per year during permit is issued for this facility or until thisper the permittee has submitted the appr2griate permittee will be considered fora ne l a lic the renewed permit is issued S^Tarcycle 2 Monitoring Location Qualitatrregardless of representative out Permit No NCS000548 U pre 'tat storm event, for each year until either another W11Ke r rescinded If at the end of this permitting cycle rnewal permit before the submittal deadline, the nplicant must continue semi-annual momtormg until Oe of monitoring periods through the end of this permitting I be performed at each stormwater discharge outfall (SDO) SECTION D: ON-SITESHIP )(JE 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 representative storm event. Table 5. Analytical Monitoring Requirements for On -Site Vehicle Maintenance Discharge Characteristics Units Measurement e_ uenc, 1 Sample T t e2 Sample locaon3tiiI H standard semi-annual Grab SDO Total Petroleum Hydrocarbons EPA Method 1664 (SGT -HE mg/l semi-annual Grab SDO Total Suspended Solids m /l semi-annual Grab SDO Total Rainfa114 inches semi-annual Rain gauge New Motor Oil Usage gallons/month semi-annual Estimate - I ti: II Wage 10 of I Permit No NCS000548 Footnotes I Measurement Frequency Twice per year during a representative 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 Z 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 representative storm event the total precipitation must be recorded An on-site or local ram gauge reading must be recorded Monitoring results shall be compared to the bench in al i abl 6. The benchmark values in Table 6 are not permit limits but should be ed s g e 1, s for the permittee's Stormwater Pollution Prevention Plan (SPPP). Excee en s of benchmark values require the permittee to increase monitoring, increase managem t actio , increase record keeping, and/or install stormwater Best Management Practices (� s , as vided in Part II Section B Table 6. Benchmark Values for VejXe ai nance Analytical Monitoring Discharge Characteristics UnitsBenchmark pH (see footnote 1)standard 6 - 91 Total Petroleum Hydrocarbons mg/L 15 Total Suspended Solids mg/L 100 Footnotes 1 If pH values outside this range are recorded in sampled stormwater discharges, but ambient rainfall data indicate precipitation pH levels are within + 0.1 standard units of the measured values or lower, then the lower threshold of this benchmark range does not apply Readings from an on-site or local rain gauge (or local precipitation data) must be documented to demonstrate background concentrations were below the normal pH range Part II %e 1 ; of I1 Permit No NCS000548 PART IIi STANDARD CONDITIONS FOR NPDES STORMWATER INDIVIDUAL PERMITS SECTION A: COMPLIANCE AND LIABILITY 2 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 wi12 months of the effective date of the initial permit issuance New Facilities applying for coverage for the first time and ex&in%PrF`C�—Mon previously permitted and applying for renewal under this permit The Stormwatet ution Plan shall be developed and implemented prior to the beginning of discharges from - ation of the industrial activity and be updated thereafter on an annual basis Secondary co_ nm t, pecified in Part ll, Section A, Paragraph 2(b) of this permit shall be accomplished prior to 0i ing: f discharges from the operation of the industrial activity Dutv to Comply . W AIL // XClea The permittee must comply n of this indrvidual permit Any permit noncompliance constitutes a violation of thet nd ►s grounds for enforcement action, for permit termination, revocation andodification, or denial of a permit upon renewal application The permittee s 1 comply ith standards or prohibitions established under section 307(a) of the Clean Water A fo ollutants within the time provided in the regulations that establish these standards or proh ' ' ns, even if the permit has not yet been modified to incorporate the requirement 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) ] 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] d Any pei -on 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 of limitation implementing any of such sections in a pei mit issued under section 402 of the Act Administrative penalties for Class I violations are not to exceed $10,000 pei violation, with the maximum amount of any Class I penalty assessed not to exceed $25,000 Penalties for Class 11 violations are not to exceed Part 111 P, Vic, 1 o! 8 Permit No NCS000548 $10,000 per day for each day during which the violation continues, with the maximum amount of any Class It penalty not to exceed $125,000 Duty to Mitigate The permittee shall take all reasonable steps to minimize or prevent any discharge in violation of this individual permit which has a reasonable likelihood of adversely affecting human health or the environment 4 Civil and Criminal Liability Except as provided in Part 111, Section C of this permit regarding bypassing of stormwater control facilities, nothing in this individual permit shall be construed to relieve the permittee from any responsibilities, liabilities, or penalties for noncompliance pursuant to NCGS 143-215 3, 143-215 6A, 143-215 613, 143- 215 6C or Section 309 of the Federal Act, 33 USC 1319 Furthermor the permittee is responsible for consequential damages, such as fish kills, even though thresp ity for effective compliance may be temporarily suspended If 5 Oil and Hazardous Substance Liability Nothing in this individual permit shall be construed recheith institution of any legal action or relieve the permittee from any responsibilities, liabilities en Les which the permittee is or may be subject to under NCGS 143-215 75 et seq or Section 311 th e era Act, 33 USC 1321 6 Propertiehts The issuance of this mdivLdua e d n convey any property rights in either real or personal property, or any exclusive prLVL es, n d t authorize any mjury to private property or any invasion of personal rights, nor any mfrL ement f F eral, State or local laws or regulations 7 Severability The provisions of this LndiTMWt 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 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 impL isonment of not more than 4 years, or both I- i t III Page � c 1'8 Permit No NCS000548 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 noncompliance 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 SECTION B: GENERAL CONDITIONS Individual Permit Expiration The permittee is not authorized to discharge after the expiration date norder to receive automatic authorization to discharge beyond the expiration date, the erm all submit forms and fees as are required by the agency authorized to issue permits no la e tha 18, ays prig to the expiration date Any permittee that has not requested renewal at least 180 d Aar pr to - or any permittee that does not have a permit after the expiration and has not requeste re wal at le 0 days prior to expiration, will be subjected to enforcement procedures as provided in N § -215 6 and 33 USC 1251 et seq Transfers This permit is not transferable to any Director may require modification or incorporate such other require ts: required to notify the Divisio m Signatory Requirements All applications, reports, bar inform All applications fafterrnotice to and approval by the Director The WEd >ssuance of the permit to change the name and Mary under the Clean Water Act The Permittee is event the permitted facility is sold or closed. submitted to the Director shall be signed and certified 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 b All reports required by the individual permit and other information requested by the Director shall be signet; by a person described above or by a duty 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) rhe 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 manag, r, opeiator of a wel, or well field, superintend mt, a position of egnrvalent Part III P,, ,e 3 of Permit No NCS000548 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 Director Any person signing a document under paragraphs a or b of this section shall make the following certification "I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete I am aware that there are significant pefor submitting false information, including the possibility of fines and unprisoru fo � o ng violations " n and Reiss The issuance of this individual permit does not proh-the " rector from reopening and modifying the ,jkaindividual permit, revoking and reissuing the and I p io r terminating the individual permit as allowed by the laws, rules, and regulations con me n itl 0, Code of Federal Regulations, Parts 122 and 123, Title 15A of the North Carolina mm ativ ode, Subchapter 2H 0100, and North Carolina General Statute 143-215 1 et al Permit Actions The permit may be modified vo n an eissued, or termmated for cause The notification of planned changes or anticipated no - mphanc es not stay any individual permit condition SECTION C: OPERATION AINTENANCE OF POLLUTION CONTROLS 1 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 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 Bypassing of Stormwater Conti of Facilities Bypass is prohibited and the Director may take enforcement action against a permittee for bypass unless Bypass was unavoidahle to prevent loss o1 life, personal injury or severe property damage, and Part . I I Pa. e 4 of 8 Permit No NCS000548 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, and c The permittee submitted notices as required under, Part 111, Section E of this permit If the Director determines that it will meet the three conditions listed above, the Director may approve an anticipated bypass after considering its adverse effects SECTION D: MONITORING AND RECORDS I Representative Sampling Yq Samples collected and measurements taken, as require ere , sh -be acteristic of the volume and nature of the permitted discharge Analytical sampling h be per ' during a representative storm event Samples shall be taken on a day and time that is W ristic of the discharge All samples shall be taken before the discharge loins or is diluted by any r w to "s earn, body of water, or substance Monitoring points as specified in this permit shall a an 13 without notification to and approval of the Director 2 Recordma Results For each measurement, sample s cti or amtenance activity performed or collected pursuant to the requirements of this individual it, e rttee shall record the following information a The date, exact p e, and ti f sampling, measurements, inspection or maintenance activity, b The individual( w ormed 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 dischai ges 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 P— rt 11, Page 5 01 .i Permit No NCS000548 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 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 6 Records Retention Visual monitoring shall be documented and records maintained at Pollution Prevention Plan Copies of analytical monitV,m permittee shall retain records of all monitoring informrecords and all original strip chart recordings for contereports required by this individual permit for a periodmeasurement, report or application This period may Inspection and Entry the cihty along with the Stormwater all also be maintained on-site The all calibration and maintenance n umentation, and copies of all ye om the date of the sample, by request of the Director at any time The permittee shall allow the Director, oraWithoiffzed apresentative (including an authorized contractor acting as a representative of the Director , in of a facility which discharges through a municipal separate storm sewer system, th . e epr ative of a municipal operator or the separate storm sewer system receiving the dis arg up resentation of credentials and other documents as may be required by law, to, a Enter upon the p ittee's pr ses where a regulated facility or activity is located or conducted, or where record ust be t under the conditions of this individual permit, b Have access to an y, 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 Discharze Monitoring Reports Samples analyzed in accordance with the terms of this permit shall be submitted to the Division on Discharge Monitoring Report (DMR) forms provided by the Director Submittals shall be delivered to the Division no later than 30 days fiom 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 iequired to submit a discharge momtoi ing report within 30 days of the end of the three-month sampling period, giving all required information and indicating "NO FLOW as per NCAC rI5A 02B 0506 Part ' , I Pa,, - 6 of 8 Permit No NCS000548 The permittee shall record the required qualitative monitoring observations on the SDO Qualitative Monitoring Report (QMR) form provided by the Division, and shall retain the completed forms on site Qualitative monitoring results should not be submitted to the Division, except upon DWQ's specific requirement to do so Submitting Reports Duplicate signed copies of all reports required herein, shall be submitted to the following address Division of Water Quality Surface Water Protection Section ATTENTION Central Files 1617 Mail Service Center Raleigh, North Carolina 27699-1617 In addition, a separate signed Annual Summary DMRccshl Abe subm�tte to the permittee's DWQ Regional Office (RO) by March 1 of each year [ R Availability of Reports Except for data determined to be confidential un ` C 14 "2-15 3(a)(2) or Section 308 of the Federal Act, 33 USC 1318, all reports prepared in acco an th terms shall be available for public inspection at the offices of the Division of Water Qual A equ by the Act, analytical data shall not be considered confidential Knowingly make any Ise tement on any such report may result in the imposition of criminal penalti,21k pr i for 'n GS 143-215 6B or in Section 309 of the Federal Act 4 Non-Stormwater Discharges If the storm event monitor in accor e with this individual permit coincides with a non-stormwater discharge, the permittee s I separa y monitor all parameters as required under the non-stormwater discharge permit and pro 'd ormation with the stormwater discharge monitoring report 5 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) 6 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 7 Bypass Anticipated bypass If the permittee Lnows in advance of the need for a bypa">s, 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 within 24 hours of becoming aware of an unanticipated bypass P, t t 1 • Page 7 of e, 10 Permit No NCS000549 Twenty-four Hour Reporting The permittee shall report to the central office or the appropriate regional office any noncompliance which may endanger health or the environment Any information shall be provided orally within 24 hours from the time the permittee became aware of the circumstances A written submission shall also be provided within 5 days of the time the permittee becomes aware of the circumstances The written submission shall contain a description of the noncompliance, and its causes, the period of noncompliance, including exact dates and times, and if the noncompliance has not been corrected, the anticipated time compliance is expected to continue, and steps taken or planned to reduce, eliminate, and prevent reoccurrence of the noncompliance The Director may waive the written report on a case-by-case basis if the oral report has been received within 24 hours .® Other Noncompliance The permittee shall report all instances of noncompl monitoring reports are submitted Other Information Where the permittee becomes aware that it individual permit or in any report to the pj 24 hour reporting at the time Mt any relevant facts in an application for an promptly submit such facts or information .'drt III Par 8 Oft, NCS000548 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 Sections 302(b) (2) (c), and (d), 304(b) (2) and 307(a) of the Clean Water Act, if the effluent guideline or water quality standard so issued or approved a 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 Act then applicable PART V ADMINISTERING AND REQUIP,01 other requirements in the E MONITORING FEE The permittee must pay the administering and co ancan,obrmg fee within 30 (thirty) days after being billed by the Division Failure to pay the fee ►nIftely r in cc ance with 15A NCAC 2H 0105(b)(4) may cause this Division to initiate action to revoke th ►d pe it PA 1 DEFINITIONS I Act See Clean Water Act 2 Arithmetic Mean The arithmetic mean of any set of values is the summation of the individual values divided by the number of individual values 3 4 Allowable Non-Stormwater D►scharaes 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 flushings, eater from footing di ams, 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, .)r phi s►cal structure 'a. is 11', V and V I P -%c I of 5 Permit No NCS000548- 5 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 6 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 7 Clean Water Act The Federal Water Pollution Control Act, also knowna e an ater Aet (CWA), as amended, 33 USC 1251, et seq 8 Division or DWO The Division of Water Quality, Department of EAt a atural Resources 9 Director Aff AW APW The Director of the Division �ater �g ty,Awninit issuing authority 10 EMC The North Carolina Envir ental M Gement Commission 11 Grab Sample IWIF 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 12 Hazardous Substance Any substance designated under 40 CFR Part 116 pursuant to Section 311 of the Clean Water Act 13 Landfill 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 infection well, a hazardous waste long-term storage facility or a surface storage facility 14 Municipal Separate Storm Sewer System A stormwater collection system within an incorporated area of local self-government such as a city of town 15 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 Industi :al m, terials or acts ities include but ar( not limited to, matcrial handling equipment or activities, Pai VI Page 2 )t � Pa �es r 17 18 10 20 21 22 23 Permit No NCS000548 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) Overburden Any material of any nature, consolidated or unconsolidated, that overlies a mineral deposit, excluding topsoil or similar naturally -occurring surface materials that are not disturbed by mining operations Permittee The owner or operator issued a permit pursuant to this individual permit Point Source Discharge of Stormwater n Any discernible, confined and discrete conveyance incl g, �specifi ally limited to, any pipe, ditch, channel, tunnel, conduit, well, or discrete fissure from w ►ch may be discharged to waters of the state Representative Storm Event A storm event that measures greater than 0 1 i9ies ,�"' hand that is preceded by at least 72 hours in which no storm event measuring greater than 0 1 me s as , ccu d A single storm event may contain up to 10 consecutive hours of no precipitation For example, f rai ours without producing any collectable discharge, and then stops, a sample may be collec a r m p odu ' discharge begins again within the next 10 hours Representative Outfall Status When it is established that e dischar f stormwater runoff from a single outfall is representative of the discharges at multiple ou a Is, the Q may grant representative outfall status Representative outfall status allows the permitt to analytical monitoring at a reduced number of outfalls Rinse Water Discharge 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 Secondary Containment 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 Section 313 Water Priority Chemical A chemical or chemical category which Is listed in 40 CFR 372 65 pursuant to Section 313 of Title III of the Superfund Amendments and Reauthorization Act (SARA) of 1986, also titled the Emergency Planning and Community Right - to -Know Act of 1986, Is present at or above threshold levels at a facility subject to SARA Title 111, Section 313 reporting requirements, and That meet - at lc,ist one of the ,ollowing criteria Part V I P; ,,e 4 of 5 Page- 24 25 Permit No NCS000548 (1) is listed in Appendix D of 40 CFR part 122 on Table Ii (organic priority pollutants), Table III (certain metals, cyanides, and phenols), or Table IV (certain toxic pollutants and hazardous substances), (2) is listed as a hazardous substance pursuant to section 31 1(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 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 reso es which can reasonably be expected to occur in the absence of a bypass Severe property e does not mean economic loss caused by delays in production 17 Significant Materials Includes, but is not limited to raw materials, fuels, pellets, finished materials such as metallic produ hazardous substances designated under sectio 001 report pursuant to section 313 of Title III irelt"s"' slag and sludge that have the potential to 26 Significant Spills 27 28 29 30 Includes, but is not hrmt( under section 3 11 of the CERCLA (Ref 40 CFR Stormwater Runoff 1I$ ucl3'as solvents, detergents, and plastic late s used in food processing or production, rC CLA, any chemical the facility is required to zers, pesticides, and waste products such as ashes, stormwater discharges or hazardous substances in excess of reportable quantities of 40 CFR 110 10 and CFR 117 21) or section 102 of The flow of water which results from precipitation and which occurs immediately following rainfall or as a result of snowmelt Stormwater Associated with Industrial Activity 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 Stormwater Pollution Prevention Plan 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 Ten Year Design Storm The maximum 24 hour precipitation event expected to be equaled or exceeded on the average once in ten years Design storm information pan be found in the State of North Caiolma Erosion and Sediment Control Planning and Design Manual Part VI P- .rc 4 o, 5 Pages W 32 Permit No NCS000548 Total Flow 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 Total Maximum Daily Load (TMDL) A TMDL is a calculation of the maximum amount of a pollutant that a waterbody can receive and still meet water quality standards, and an allocation of that amount to the pollutant's sources A TMDL is a detailed water quality assessment that provides the scientific foundation for an implementation plan The implementation plan outlines the steps necessary to reduce pollutant 12gds in a certain body of water to restore and maintain water quality standards in all seasons Th Water Act, Section 303, establishes the water quality standards and TMDL programs Agr 19 33 Toxic Pollutant 34 35 36 37 Any pollutant listed as toxic under Section 30 Upset Act Means an exceptional incident in whichLhr, is 121jeional and temporary noncompliance with technology based permiteffl mi tion be of factors beyond the reasonable control of the permittee An upset does not i lu no o iance to the extent caused by operational error, improperly designed treatment or control fa flies, a ate treatment or control facilities, lack of preventive maintenance, or careless or roper per ion Vehicle rehabilitation, me FWVIFal repairs, painting, fueling, lubrication, vehicle cleaning operations, or airport deicing operations 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 Pai VI Page '� of 5 P. �_,es