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Home My WebLink AboutNC0004944_Draft Permit_20171017Water Resources ENVIRONMENTAL QUALITY October 17, 2017 Mr. Richard L. Moore, Plant Manager DuraFibers Technologies, Inc. 7401 Statesville Blvd Salisbury, North Carolina 28147 ROY COOPER Governor MICHAEL S. REGAN Secretary S. JAY ZIMMERMAN Director Subject: Draft NPDES Permit Permit NC0004944 DuraFibers Technologies, Inc. Rowan County Facility Class III Dear Mr. Moore: Enclosed with this letter is a copy of the draft permit for your facility. Please review the draft very carefully to ensure thorough understanding of the conditions and requirements it contains The draft permit contains the following significant changes from your current permit: • The BOD, TSS, and OCPSF parameter hmits have been re -calculated based on the most recent production data. • The Total Copper limits were added to the permit based on the results of the Reasonable Potential Analysis. • The Nutrient Reopener for High Rock Lake Special Condition was added to the permit (Please see Special Condition A. (5.)). • Proposed federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and specify that, if a state does not establish a system to receive such submittals, then perinittees must submit DMRs electronically to the Environmental Protection Agency (EPA) The Division anticipates that these regulations will be adopted and is beginning implementation. The requirement to begin reporting discharge monitoring data electronically using the NC DWR's Electronic Discharge Monitoring Report (eDMR) internet application has been added to the permit. (Please see Special Condition A. (4.)) Nothing Compares--, State of North Carolina I Environmental Quality I Water Resources 512 N Salisbury Street 1 1611 Mail Service Center I Raleigh, NC 27699-1611 919 7079000 Please provide any comments you have regarding the draft permit to this office by November 17, 2017. At this time, the DiN ision is also publishing a notice In the newspapers of general circulation in Rowan County, inviting public comment on the draft permit. Following the 30-day comment period, we will review all pertinent comments received and take appropriate action on the permit renewal. If you have any questions about the NPDES permit process, please contact me at the following e-mail address: sergei.chernikov@ncdenr.gov, or telephone number: 919-807-6386. Sincerely, Sergei Cherenkov, Ph.D. Environmental Engineer II Complex NPDES Permitting Unit cc- NPDES Files EPA (e-copy) Mooresville Regional Office / Water Quality (e-copy) WSS/Aquatic Toxicology Unit (e-copy) Wastewater Operator Certification Group (e-copy) WSS/Monitoring coalition coordinator (e-copy) Nothing Compares--,, State of North Carolina I Environmental Quality I Water Resources 512 N Salisbury Street 1 1611 Mad Service Center I Raleigh, NC 27699-1611 919 7079000 Permit NC0004944 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY DIVISION OF WATER RESOURCES Draft PERMIT TO DISCHARGE WASTEWATER UNDER THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM In compliance with the provisions of North Carolina General Statute 143-215 1, other lawful standards and regulations promulgated and adopted by the North Carolina Environmental Management Commission, and the Federal Water Pollution Control Act, as amended, DuraFibers Technologies, Inc. is hereby authorized to discharge wastewater and stormwater from a facility located at DuraFibers Technologies, Inc. 7401 Statesville Blvd. Salisbury Rowan County to receiving waters designated as North Second Creek in the Yadkin -Pee Dee River Basin in accordance with effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, III, and IV hereof. The permit shall become effective This permit and the authorization to discharge shall expire at midnight on November 30, 2022 Signed this day S. Jay Zimmerman P.G., Director Division of Water Resources By Authority of the Environmental Management Commission Page 1 of 19 Permit NC0004944 SUPPLEMENT TO PERMIT COVER SHEET All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby revoked, and as of this issuance, any previously issued permit bearing tus number is no longer effective Therefore, the exclusive authority to operate and discharge from this facility arises under the permit conditions, requirements, terms, and provisions included herein. DuraFibers Technologies, Inc. is hereby authorized to Continue to operate an existing 2.305 MGD activated sludge wastewater treatment facility located at Performance Fibers Salisbury facility at 7401 Statesville Blvd, in Rowan County. The treatment system referenced herein consists of the following. • Bar screen and grit removal; • Chlorine contact (sanitary wastes) • Two covered equalization tanks; • Three aeration basins (one out -of —service); • Anaerobic groundwater treatment unit (out -of -service); • Three secondary clarifiers (one out -of -service); • Three aerated polishing ponds, • Chemical additional facihues, • Aerobic digestion, • Sludge dewatering; and • Instrumented flow measurement. Discharge from said treatmenc works through outfall 001 at the location specified on the attached map into North Second Creek, a class C water in the Yadkin -Pee Dee River Basin, and Continue to discharge stormwater associated with industrial activity through five outfalls (outfalls A, B, C, D, and 5) as shown on the attached map. Modifications to the stormwater conveyance system are authorized by this permit in accordance with documentation to be included in the facility's Stormwater Pollution Prevention Plan (construction activities must be authorized under General Permit No NCG010000). Page 2 of 19 Permit NC0004944 Part I, Section A A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS-OUTFALL 001 [15A NCAC 02B 0400 et seq., 02B 0500 et seq.] Beginning on the effective date of this permit and lasting through the expiration date, the Permittee is authorized to discharge from Outfall 001 Such discharges shall be limited and monitored3 by the Pernuttee as specified below. PARAMETER EFFLUENT LIMITATIONS MONITORING REQUIREMENTS Monthly Average Daily Maximum Measurement Frequency Sample Type Sample Location' Flow (MGD) 2 305 Continuous Recording Effluent BOD5 60.0lbs/day 149.0lbs/day 3/Week Composite Effluent NH3 as N 23 lbs/day 46 lbs/day Weekly Composite Effluent Total Suspended Solids 96 0 lbs/day 294 0 lbs/day 3/Week Composite Effluent Fecal Cohform (geometric mean) 200/100 mL 400/100 mL Weekly Grab Effluent Dissolved Oxygen Daily Average not less than 5 0 3/Week Grab Effluent Dissolved Oxygen, mg/L See Note 1 Grab U,D Conductivity, µmho/cm See Note 1 Grab U,D Temperature, °C See Note 1 Grab U,D Total Copper 23 1 µg/L 27.3 µg/L Monthly Composite Effluent Total Mercury, ng/L4 Annually Grab Effluent PH Between 6 0 and 9.0 Standard Units 3/Week Grab Effluent Chronic Toxicity2 Quarterly Composite Effluent 40 CFR 414 Subpart I See Part I, Section A (2 ) Notes: 1 Sample Locations- U — Upstream at least 100 feet above the outfall, D — Downstream approximately eight miles from the outfall or at Highway 601 Upstream and downstream samples shall be collected three tunes per week during the months of June, July, August, and September and once per week during the remaining months of the year. Instream sampling requirements are provisionally waived in light of the Permittee's participation in the Yadkin -Pee Dee River Basin Association (the Association) All instream sampling requirements are immediately reinstated should the Permittee cease participation in the Association. 2 Chronic Toxicity (Ceriodaphnia) P/F @ 34% February, May, August, November, see condition A (3) Toxicity monitoring shall coincide with metals monitoring 3 See Special Condition A (4.) 4 The facility shall use EPA method 1631E. THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS. ANALYTICAL DATA WHICH IS LESS THAN THE PRACTICAL QUANTITATION LEVEL SHALL BE REPORTED AS SUCH AND CONSIDERED ZERO FOR THE PURPOSES OF CALCULATING AVERAGES Page 3 of 19 Permit NC0004944 A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS- OCPSF PARAMETERS-OUTFALL 001 [15A NCAC 02B 0400 et seq., 02B .0500 et seq] Beginning on the effective date of this permit and lasting through the expiration date, the Per=ttee shall comply with the limitations and monitorn g2 frequencies established below at Outfall 001: PARAMETER EFFLUENT LIMITATIONS MONITORING REQUIREMENTS Monthly Average' Daily Maximum' Measurement Frequency Sample Type Sample Location Acenaphthene 0 048 0.129 Annually Grab Effluent Acenaphthylene 0 048 0.129 Annually Grab Effluent Acrylonitrile 8.4 µg/L 8 4 µg/L Annually Grab Effluent Anthracene 0147 µg/L 0.147 µg/L Annually Grab Effluent Benzene 0.081 0 297 Annually Grab Effluent Benzo(a)anthracene 104 µg/L 1.04 µg/L Annually Grab Effluent 3,4-Benzofluoranthene 104 µg/L 104 µg/L Annually Grab Effluent Benzo(k)fluoranthene 1.04 µg/L 104 µg/L Annually Grab Effluent Benzo(a)pyrene 1.04 µg/L 104 µg/L Annually Grab Effluent Bis(2-ethylhexyl) phthalate 0.225 0.610 Annually Grab Effluent Carbon Tetrachloride 0.039 0.083 Annually Grab Effluent Chlorobenzene 0 033 0 061 Annually Grab Effluent Chloroethane 0 227 0 586 Annually Grab Effluent Chloroform 0.046 0101 Annually Grab Effluent 2-Chlorophenol 0.068 0 214 Annually Grab Effluent Chrysene 1.038 µg/L 1038 µg/L Annually Grab Effluent Di-n-butyl phthalate 0.059 0125 Annually Grab Effluent 1,2-Dichlorobenzene 0.168 0.356 Annually Grab Effluent 1,3-Dichlorobenzene 0 068 0.096 Annually Grab Effluent 1,4-Dichlorobenzene 0 033 0 061 Annually Grab Effluent 1,1-Dichloroethane 0 048 0 129 Annually Grab Effluent 1,2-Dichloroethane 0149 0.461 Annually Grab Effluent 1,1-Dichloroethylene 0 035 0 055 Annually Grab Effluent 1,2-trans-Dichloroethylene 0 046 0.118 Annually Grab Effluent 2,4-Dichlorophenol 0.085 0.245 Annually Grab Effluent 1,2-Dichloropropane 0 334 0.503 Annually Grab Effluent 1,3-Dichloropropylene 0 063 0.096 Annually Grab Effluent Diethyl phthalate 0177 0.444 Annually Grab Effluent 2,4-Dunethylphenol 0.039 0.079 Annually Grab Effluent Dimethyl phthalate 0.042 0103 Annually Grab Effluent 4,6-Duutro-o-cresol 0.170 0.605 Annually Grab Effluent 2,4-Dinitrophenol 0.155 0.269 Annually Grab Effluent Page 4 of 19 Permit NC0004944 A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS- OCPSF PARAMETERS CONTINUED- OUTFALL 001 [15A NCAC 02B .0400 et seq., 02B .0500 et seq ] Beginning on the effective date of this permit and lasting through the expiration date, the Permittee shall comply with the limitations and momtoring2 frequencies established below at outfall 001: PARAMETER EFFLUENT LIMITATIONS MONITORING REQUIREMENTS Monthly Average' Daily Maximum' Measurement Frequency Sample Type Sample Location 2,4-Dinitrotoluene 0.247 0.623 Annually Grab Effluent 2,6-Duutrotoluene 23.8 µg/L 23.8 µg/L Annually Grab Effluent Ethylbenzene 0.070 0.236 Annually Grab Effluent Fluoranthene 0.322 µg/L 0 322 µg/L Annually Grab Effluent Fluorene 0.048 0.129 Annually Grab Effluent Hexachlorobenzene 0 01 µg/L 0.01 µg/L Annually Grab Effluent Hexachlorobutadiene 0.044 0107 Annually Grab Effluent Hexachloroethane 0.046 0.118 Annually Grab Effluent Methyl Chloride 0.188 0 415 Annually Grab Effluent Methylene Chloride 0.087 0194 Annually Grab Effluent Naphthalene 0.048 0.129 Annually Grab Effluent Nitrobenzene 0.059 0.149 Annually Grab Effluent 2-Nitrophenol 0.090 0.151 Annually Grab Effluent 4-Nitrophenol 0.157 0 271 Annually Grab Effluent Phenanthrene 0.048 0.129 Annually Grab Effluent Phenol 0.033 0 057 Annually Grab Effluent Pyrene 0.055 0146 Annually Grab Effluent Tetrachloroethylene 0.048 0.122 Annually Grab Effluent Toluene 0.057 0.175 Annually Grab Effluent 1,2,4-Trichlorobenzene 0.149 0.306 Annually Grab Effluent 1,1,1-Trichloroethane 0 046 0.118 Annually Grab Effluent 1,1,2-Trichloroethane 0.046 0.118 Annually Grab Effluent Trichloroethylene 0.046 0.118 Annually Grab Effluent Vinyl Chloride 0 227 0.586 Annually Grab Effluent Total Chromium 146 5 µg/L 2.425 Annually Grab Effluent Total Cyanide 14 65 µg/L 57.3 µg/L Annually Grab Effluent Total Lead 8 62 µg/L 196.7 µg/L Annually Grab Effluent Total Nickel 109.1 µg/L 873.8 µg/L Annually Grab Effluent Total Zinc 2 294 5.703 Annually Grab Effluent Notes•. 1.All units are lbs/day unless otherwise noted. 2. See Special Condition A. (4.). Page 5 of 19 Permit NC0004944 A. (3.) CHRONIC TOXICITY PASS/FAIL LIMIT (QUARTERLY) — OUTFALL 001 [15A NCAC 02B 0200 et seq ] The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to Ceriodapbnia dubia at an effluent concentration of 34 0 % The permit holder shall perform at a minimum, euz a�terly monitoring using test procedures outlined in the "North Carolina Cenodaphnia Chronic Effluent Bioassay Procedure," Revised February 1998, or subsequent versions or "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions. The tests will be performed during the months of February, May, August, and November. Effluent sampling for this testing shall be performed at the NPDES permitted final effluert discharge below all treatment processes If the quarterly test procedure results in a failure or ChV below the permit limit, then multiple -concentration testing shall be performed at a minimum, in each of the two following months as described in "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -December 2010) or subsequent versions. All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge Monitoring Form (MR-1) for the months in which tests were performed, using the parameter code TGP3B for the pass/fail results and THP3B for the Chronic Value Additionally, DWR Form AT-3 (original) is to be sent to the following address: Attention- North Carolina Division of Water Resources Water Sciences Section/Aquatic Toxicology Branch 1621 Mail Service Center Raleigh, North Carolina 27699-1621 Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section no later than 30 days after the end of the reporting period for which the report is made. Test data shall be complete, accurate, include all supporting chemical/physical measurements and all concentration/response data, and be certified by laboratory supervisor and ORC or approved designate signature. Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for disinfection of the waste stream Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required, the permittee will complete the information located at the top of the aquatic toxicity (AT) test form indicating the facility name, permit number, pipe number, county, and the month/year of the report with the notation of "No Flow" in the comment area of the form The report shall be submitted to the Water Sciences Section at the address cited above. Should the permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will be required during the following month. Assessment of toxicity compliance is based on the toxicity testing month Should any test data from this monitoring reeuirement or tests performed by the North Carolina Division of Water Resources indicate potential impacts to the receiving stream, this permit may be re -opened and modified to include alternate monitoring requirements or limits NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism survival, minimum control organism reproduction, and appropriate environmental controls, shall constitute an invalid test and will require immediate follow-up testing to be completed no later than the last day of the month following the month of the initial monitoring. Page 6 of 19 Permit NC0004944 A. (4.) ELECTRONIC REPORTING OF MONITORING REPORTS [G.S 143-2151(b)] Federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and program reports and specify that, if a state does not establish a system to receive such submittals, then permittees must submit monitoring data and reports electronically to the Environmental Protection Agency (EPA). The final NPDES Electronic Reporting Rule was adopted and became effective on December 21, 2015 NOTE This special condition supplements or supersedes the following sections within Part II of this permit (Standard Conditions for NPDES Permits): • Section B (11) • Section D. (2 ) • Section D (6 ) • Section E. (5.) Signatory Requirements Reporting Records Retention Monitoring Reports 1. Reporting Requirements [Supersedes Section D (2) and Section E. (5.) (a)] Effective December 21, 2016, the permittee shall report discharge monitoring data electronically using the NC DWR's Electronic Discharge Monitoring Report (eDMR) internet application Monitoring results obtained during the previous month(s) shall be summarized for each month and submitted electronically using eDMR The eDMR system allows permitted facilities to enter monitoring data and submit DMRs electronically using the internet Until such time that the state's eDMR application is compliant with EPA's Cross - Media Electronic Reporting Regulation (CROMERR), permittees will be required to submit all discharge monitoring data to the state electronically using eDMR and will be required to complete the eDMR submission by printing, signing, and submitting one signed original and a copy of the computer printed eDMR to the following address. NC DEQ / Division of Water Resources / Water Quality Permitting Section ATTENTION Central Files 1617 Mail Service Center Raleigh, North Carolina 27699-1617 If a permittee is unable to use the eDMR system due to a demonstrated hardship or due to the facility being physically located in an area where less than 10 percent of the households have broadband access, then a temporary waiver from the NPDES electronic reporting requirements may be granted and discharge monitoring data may be submitted on paper DMR forms (MR 1, 11, 2, 3) or alternative forms approved by the Director Duplicate signed copies shall be submitted to the mailing address above See "How to Request a Waiver from Electronic Reporting" section below Regardless of the submission method, the first DMR is due on the last day of the month following the issuance of the permit or in the case of a new facility, on the last day of the month following the commencement of discharge. Starting on December 21, 2020, the permittee must electronically report the following compliance monitoring data and reports, when applicable Sewer Overflow/Bypass Event Reports; Pretreatment Program Annual Reports, and Clean Water Act (CWA) Section 316(b) Annual Reports The permittee may seek an electronic reporting waiver from the Division (see "How to Request a Waiver from Electronic Reporting" section below). Page 7 of 19 Permit NC0004944 2. Electronic Submissions In accordance with 40 CFR 122.41 (l) (9), the permittee must identify the initial recipient at the time of each electronic submission The permittee should use the EPA's website resources to identify the initial recipient for the electronic submission. Initial recipient of electronic NPDES information from NPDES-regulated facilities means the entity (EPA or the state authorized by EPA to implement the NPDES program) that is the designated entity for receiving electronic NPDES data [see 40 CFR 127 2(b)] EPA plans to establish a website that will also link to the appropriate electronic reporting tool for each type of electronic submission and for each state. Instructions on how to access and use the appropriate electronic reporting tool will be available as well. Information on EPA's NPDES Electronic Reporting Rule is found at. https //wwwfederalregistergov/documents/2015/10/22/2015-24954/national-pollutant-discharge-ehmmation- sys tem-npdes-electronic-rep orting-rule Electronic submissions must start by the dates listed in the "Reporting Requirements" section above. 3. How to Request a Waiver from Electronic Reporting The permittee may seek a temporary electronic reporting waiver from the Division To obtain an electronic reporting waiver, a permittee must first submit an electronic reporting waiver request to the Division. Requests for temporary electronic reporting waivers must be submitted in writing to the Division for written approval at least sixty (60) days prior to the date the facility would be required under this permit to begin submitting monitoring data and reports The duration of a temporary waiver shall not exceed 5 years and shall thereupon expire At such time, monitoring data and reports shall be submitted electronically to the Division unless the permittee re -applies for and is granted a new temporary electronic reporting waiver by the Division. Approved electronic reporting waivers are not transferrable Only permittees with an approved reporting waiver request may submit monitoring data and reports on paper to the Division for the period that the approved reporting waiver request is effective. Information on eDMR and the application for a temporary electronic reporting waiver are found on the following web page: http //deq nc gov/about/divisions/water-resources/edmr 4. Signatory Requirements [Supplements Section B. (11.) (b) and Supersedes Section B. (11.) d�] All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part II, Section B. (11 )(a) or by a duly authorized representative of that personas described in Part II, Section B (11)(b) A person, and not a position, must be delegated signatory authority for eDMR reporting purposes For eDMR submissions, the person signing and submitting the DMR must obtain an eDMR user account and login credentials to access the eDMR system For more information on North Carolina's eDMR system, registering for eDMR and obtaining an eDMR user account, please visit the following web page. http•//deq tic gov/about/chvisions/water-resources/edmr Certification Any person submitting an electronic DMR using the state's eDMR system shall make the following certification [40 CFR 122 22]. NO OTHER STATEMENTS OF CERTIFICATION WILL BE ACCEPTED: "I cert, underpenalty of law, that this document and all attachment were prepared under my direction or supervision in accordance with a ystem designed to assure that qual fed personnel properlygather and evaluate the information submitted. Based on my inquiry of the person orpersons who manage the ystem, or those persons directly responsible forgathenng the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are sign f cant penalties for submitting falre information, including the possibility of fines and imprisonment for knowing violations. " Page 8 of 19 Permit NC0004944 5. Records Retention (Supplements Section D. (6.)� The permittee shall retain records of all Discharge Monitoring Reports, including eDMR submissions These records or copies shall be maintained for a period of at least 3 years from the date of the report This period may be extended by request of the Director at any time [40 CFR 122.41] A. (5.) NUTRIENT REOPENER for HIGH ROCK LAKE [G S 143-215 1(b)] This permit may be reopened and mochfied to implement nutrient requirements in accordance with any future TMDL and/or nutrient management strategy for High Rock Lake Part I, Section B. 1. FINAL LIMITATIONS AND CONTROLS FOR STORMWATER DISCHARGES During the period beginning on the effective date of the permit and lasting until the facility begins coverage under an industrial stormwater permit, the permittee is authorized to discharge stormwater from outfalls A, B, C, D, and 5 Such discharges shall be controlled, limited and monitored as specified below a) STORMWATER POLLUTION PREVENTION PLAN The permittee shall develop and continue to update a Stormwater Pollution Prevention Plan (SPPP), herein after referred to as the Plan The Plan shall be considered public information and shall include, at a minimum, the following .items (1) Site Overview. The site overview shall provide a description of the physical facility and the potential pollutant sources which may be expected to contribute to contamination of stormwater discharges The site plan shall contain the following. (a) A general location map (USGS quadrangle map or appropriately drafted equivalent map), showing the facility's location in relation to transportation routes and surface waters, the name of the receiving water(s) to which the stormwater outfall(s) discharges, or if the discharge is to a municipal separate storm sewer system, the name of the municipality and the ultimate receiving waters, and accurate latitude and longitude of the point(s) of discharge The general location map (or alternatively the site map) shall identify whether each receiving water is impaired (on the state's 303(d) list of unpaired waters) or is located in a watershed for which a TMDL has been established, and what the parameter(s) of concern are (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 and north arrow) 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 Page 9 of 19 Permit NCOOO4944 (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 permittee shall re -certify annually 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 II, Standard Conditions, Section B, Paragraph 11 The permittee shall re -certify annually that the stormwater outfalls have been evaluated for the presence of non-stormwater discharges (2) Stormwater Management Strategy The stormwater management strategy 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. Wherever practiczl, the permittee shall prevent exposure of all storage areas, material handling operations, and manufacturing or fueling operations In areas where elimination of exposure is not practical, the stormwater management plan shall document the feasibility of diverting the stormwater runoff away from areas of potential contamination (b) Secondary Containment Requirements and Records. Secondary containment is required for: bulk storage of liquid materials; storage in any amount of Section 313 of Title III of the Superfund Amendments and Reauthorization Act (SARA) water priority chemicals, and storage in any amount of hazardous substances, in order to prevent leaks and spills from contaminating stormwater runoff A table or summary of all such tanks and stored materials and their associated secondary containment areas shall be maintained. If the secondary containment devices are connected 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 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 (5) years. For facilities subject to a federal oil Spill Prevention, Control, and Countermeasure Plan (SPCC,, any portion of the SPCC Plan fully compliant with the requirements of this permit may be used to demonstrate compliance with this permit. The Division may allow exceptions to secondary containment requirements for mobile refuelers, as with the exemption provided by amendments to federal SPCC regulations, as long as appropriate spill containment and/or diversionary structures or equipment is used to prevent discharge to surface waters Exceptions do not apply to refuelers or other mobile tan-kage used primarily as bulk liquid material storage in a fixed location in place of stationary containers (c) BMP Summary A hsting 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 Page 10 of 19 Permit NCOOO4944 responsible person shall be on -site at all tunes 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, loading and unloading areas, and haul roads), all drainage features and structures, and existing structural BMPs The program shall establish schedules of inspections, maintenance, and housekeeping activities of stormwater control systems, as well as facility equipment, facility areas, and facility systems that present a potential for stormwater exposure or stormwater pollution Inspection of material handling areas and regular cleaning schedules of these areas shall be incorporated into the program. Timely compliance with the established schedules for inspections, maintenance, and housekeeping shall be recorded in writing and maintained in the SPPP. (5) Employee Training Training 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 Responsibihties for all components of the Plan shall be documented and position assignments provided (7) SPPP Amendment and Annual Update. The permittee shall amend the SPPP 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 (3) 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 The annual update shall include a documented re- evaluation of the effectiveness of the BMPs listed in the BMP Summary of the Stormwater Management Strategy. The annual update shall also include a review and comparison of sample analytical data to benchmark values over the past year, including a discussion about Tiered Response status 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 II, Standard Conditions, Section B, Paragraph 11 to the Director that the changes have been made. (8) Facility Inspections Inspections of the facility and all stormwater ystems 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 Qanuary to June), and once during the second half Quly 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 Section B. 1. b) (8) — Qualitative Monitoring below (9) SPPP Implementation The permittee shall implement the Plan Implementation of the Plan shall include documentation of all monitoring, measurements, inspections, maintenance activities, and training provided Page 11 of 19 Permit NC0004944 to employees, including the log of the sampling data and of actions taken to implement BMPs associated with the industrial activities, including vehicle maintenance activities. Such documentation shall be kept on - site for a period of five years and made available to the Director or the Director's authorized representative immediately upon request b) MINIMUM MONITORING AND REPORTING REQUIREMENTS (1) Analytical monitoring of stormwater discharges shall be performed as specified in Table 1 All samples shall be collected from a discharge resulting from a measureable storm event. The required monitoring will result in a minimum of six (6) 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 the permittee obtains approval from the local Regional Office Supervisor. (2) If the stormwater is controlled by a detention pond, and that pond discharges only in response to a storm event exceeding a 25-year, 24-hour storm, the pond shall be considered a non-dtscharging stormwater control system and not subject to NPDES requirements, unless the discharge causes a violation of water quality standards (3) Stormwater samples analyzed in accordance with the terms of this permit shall be submitted on forms provided by the Director The permittee must report the results from all samples taken within the monitoring period as specified in the Standard Conditions of this permit, and as supplemented or superseded by electronic DMR reporting requirements in Part I, Section A(4) For purposes of benchmark comparison and Tiered response actions, the permittee shall use the analytical results from the first sample with valid results within the monitoring period (4) Specific monitoring requirements* (a) Monitoring in Table 1 applies to all of the stormwater discharges associated with industrial activity that discharge to the surface waters of the state. Table 1. Analytical Stormwater Monitoring Requirements Discharge Characteristics Units Measurement Fre uenc 1 Sample Type2 Sample Location3 Total Suspended Solids m /L semi-annual Grab SDO Biological Oxygen Demand (BOD), 5- day, 20 oC mg/L semi-annual Grab SDO Non -polar Oil and Grease, by EPA. Method 1664 SGT-HE mg/L semi-annual Grab SDO Total Nitrogen 4 m /L semi-annual Grab SDO Total Phosphorus 4 m /L semi-annual Grab SDO H standard semi-annual Grab SDO Total Rainfalls inches semi-annual Rain Gauge - Footnotes: 1 Measurement Frequency. Twice per year during a measureable storm event. Page 12 of 19 Permit NC0004944 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 The pe=ttee may discontinue monitoring for TN and TP after four (4) consecutive samples if all values are below the benchmarks in Table 4. 5 For each sampled measureable 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 analytical samplings in accordance with the schedule specified below in Table 2, unless adverse weather conditions prevent sample collection (see Adverse Weather in Stormwater Defirntions) Sampling is not required outside of the facility's normal operating hours 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. Inability to sample because of adverse weather conditions must be documented in the SPPP and recorded on the DMR Table 2. MonitorinLy Schedule Monitoring period' Sample Number Start End Year 1 — Period 1 1 July 1, 2016 December 31, 2016 Year 1 — Period 2 2 January 1, 2017 June 30, 2017 Year 2 — Period 1 3 July 1, 2017 December 31, 2017 Year 2 — Period 2 4 January 1, 2018 June 30, 2018 Year 3 — Period 1 5 July 1, 2018 December 31, 2018 Year 3 — Period 2 and During Renewal Processz 6+ January 1, 2019 March 31, 2019 Footnotes. 1 If no discharge occurs during the sampling period, the permittee must record "No Flow" on a monitoring report within 30 days of the end of the sampling period and maintain this record in the SPPP 2 Maintain semi-annual monitoring during permit renewal process The applicant must continue semi-annual monitoring until the renewed permit is issued or a separate NPDES Stormwater Permit is issued. (b) 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 3 This monitoring shall be performed at all stormwater discharge outfalls which discharge stormwater runoff from vehicle maintenance areas, in accordance with the schedule presented in Table 2. All analytical monitoring shall be performed during a measureable storm event Table 3. Analvtical MonitorinLy Requirements for On -Site Vehicle Maintenance Discharge Characteristics Units Measurement Fre uenc 1 Sample Type2 Sample Location3 H standard semi-annual Grab SDO Non -polar Oil and Grease, by EPA Method 1664 SGT-HE mg/l semi-annual Grab SDO Total Suspended Solids SS mg/1 semi-annual Grab SDO Total Rainfall4 inches semi-annual Rain gauge New Motor Oil Usage allons/month semi-annual Estimate - Footnotes. Page 13 of 19 Permit NC0004944 1 Measurement Frequency Twice per year during a measureable storm event, for each year until either another permit is issued for this facility or until this permit is revoked or rescinded 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 4. The benchmark values in Table 4 are not permit limits but should be used as guidelines for the permittee's SPPP Exceedances of benchmark values require the pe=ttee to increase monitoring, increase management actions, increase record keeping, and/or install stormwater Best Management Practices (BMPs), as provided in 3 below. (5) The permtttee shall report the analytical results from each sample within the monitoring period The pernuttee shall compare monitoring results to the benchmark values in Table 4. The benchmark values in Table 4 are not permit limits but should be used as guidelines for the permittee's Stormwater Pollution Prevention Plan (SPPP) Exceedances of benchmark values require the permtttee to increase monitoring, increase management actions, increase record keeping, and/or install stormwater Best Management Practices (BMPs) in a tiered program See ti=e descriptions of Tier One and Tier Two Table 4. Benchmark Values for Analytical Monitoring Discharge Characteristics Units Benchmark Total Suspended Solids (TSS) m /L 100 Biological Oxygen Demand OD m /L 30 Non -polar Oil and Grease, by EPA Method 1664 (SGT-HEM) mg/L 15 Total Nitrogen m /L 30 Total Phosphorus m /L 2 H standard 6-9 Tier One 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 permtttee shall 1 Conduct a stormwater managemen= inspection of the facility within two weeks of receiving sampling results. 2 Identify and evaluate possible causes of the benchmark value exceedance. 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 inspection. 5 Record each instance of a Tier One response in the Stormwater Pollution Prevention Plan Include the date and value of the benchmark exceedance, the inspection date, the personnel conducting the inspection, the selected actions, and the date the selected actions were implemented Page 14 of 19 Permit NC0004944 Tier Two If. During the term of this permit, the first valid sampling results from two consecutive monitoring periods are above the benchmark values, or outside of the benchmark range, for any specific parameter at a specific Then: The permittee shall 1. Repeat all the required actions outlined above in Tier One 2 Immediately institute monthly monitoring for all parameters 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. 3 If no discharge occurs during the sampling period, the permittee is required to record "No Flow" on a monthly monitoring report 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 DWR Regional Office Supervisor in writing within 30 days of receipt of the fourth analytical results DWR 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 (6) If a facility is required to sample multiple stormwater discharge locations, the permittee may petition the Director to sample at a reduced number of outfalls. These outfalls would be granted "Representative Outfall Status" (ROS) DWR may grant Representative Outfall Status if discharges from a single outfall are representative of discharges from multiple outfalls. Approved ROS will reduce the number of outfalls where analytical sampling requirements apply. Qualitative observations shall be recorded for all outfall locations (7) This site discharges to impaired waters experiencing problems with nutrient loading (High Rock Lake watershed) If a Total Maximum Daily Load (TMDL) is approved for this segment of North Second Creek 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 Resources 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 (8) Qualitative monitoring requires a visual inspection of each stormwater outfall regardless of representative outfall status and shall be performed as specified in Table 5, during the analytical monitoring event [If analytical monitoring is not required, the permittee still must conduct semi-annual qualitative monitoring] Qualitative monitoring is for the purpose of evaluating the effectiveness of the Stormwater Pollution Prevention Plan (SPPP) and assessing new sources of stormwater pollution Page 15 of 19 Permit NC0004944 Table 5. Qualitative Stormwater Monitoring Requirements Discharge Characteristics Fre uenc 1 Monitoring Location2 Color semmu-annual SDO Odor semi-annual SDO Clam 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. 1 Measurement Frequency Twice per year during a measureable storm event, for each year until either another permit is issued for this facility or until this permit is revoked or rescinded The applicant must continue semi-annual monitoring until the renewed permit is issued or a separate NPDES Stormwater Permit is issued See Table 2 for schedule of monitoring periods through the end of this permitting cycle. 2 Monitoring Location- Qualitative _monitoring shall be performed at each stormwater discharge outfall (SDO) regardless of representative outfall status 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 (9) 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 DWR's specific requirement to do SO. c) REQUIREMENT TO APPLY FOR SEPARATE STORMWATER PERMIT The permittee is not authorized to discharge stormwater after the expiration date In order to receive automatic authorization to discharge beyond the expiration date, the permittee shall submit forms and fees as are required by the agency authorized to issue per--mits no later than 180 days prior to the expiration date, unless permission for a later date has been granted by the Director. (The Director shall not grant permission for applications to be submitted later than the expiration date of the existing permit) [40 CFR 122 21(d)]. The permittee must apply separately to the North Carolina Division of Energy, Mineral, and Land Resources (DEMLR) Stormwater Program for a separate NPDES Stormwater Discharge Permit no later than 180 days prior to the expiration of this permit from the Division of Water Resources (DWR). d) RECORDS RETENTION Along with the Stormwater Pollution Prevention Plan (SPPP), qualitative monitoring shall be documented and records maintained at the facility Copies of analytical monitoring results shall also be maintained on -site The permittee shall retain records of all monitoring information, including all calibration and maintenance records and all original strip chart recordings for continuous monitoring instrumentation, and copies of all reports required by Page 16 of 19 Permit NC0004944 this individual permit for a period of at least 5 years from the date of the sample, measurement, report or application This period may be extended by request of the Director at any time d) BYPASSING OF STORMWATER CONTROL FACILITIES Bypass is prohibited, and the Director may take enforcement action against a permittee for bypass unless (1) The bypass was unavoidable to prevent loss of life, personal injury or severe property damage; and (2) 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 (3) The permittee submitted notices as required under, Part III, Section C 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 e) Stormwater Definitions (1) Adverse Weather Adverse conditions are those that are dangerous or create inaccessibility for personnel, such as local flooding, high winds, or electrical storms, or situations that otherwise make sampling impractical. When adverse weather conditions prevent the collection of samples during the sample period, the permittee must take a substitute sample or perform a visual assessment during the next qualifying storm event Documentation of an adverse event (with date, time and written narrative) and the rationale must be included with SPPP records. Adverse weather does not exempt the permittee from having to file a monitoring report in accordance with the sampling schedule Adverse events and failures to monitor must also be explained and reported on the relevant DMR (2) 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 //wwxv epa gov/npdes/national-menu-best-management-practices-bmps-stormwater#edu. (3) 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 having a total storage capacity of greater than 1,320 gallons (4) Municipal Separate Storm Sewer System OjS4) A stormwater collection system within an incorporated area of local self-government such as a city or town (5) 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 ram, 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 DWR 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 5122 26(g) (6) Measureable Storm Event 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 Page 17 of 19 Permit NC0004944 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 Regional Office Supervisor in writing. (7) Point Source Discharge of Stormwater Any discernible, confined and discrete conveyance, including but specifically not limited to, any pipe, ditch, channel, tunnel, conduit, well, discrete fissure, container, rolling stock, or concentrated animal feeding operation from which pollutants are or may be discharged via stormwater to waters of the state. (8) 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 DWR may grant representative outfall status Representative outfall status allows the permittee to perform analytical monitoring at a reduced number of outfalls. (9) 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 (10) Section 313 Water Priority Chemical A chemical or chemical category which (a) 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, (b) Is present at or above threshold levels at a facility subject to SARA title III, Section 313 reporting requirements, and (c) That meets at least one of the following criteria. (1) Is listed in appendix D of 40 CFR part 122 on either Table II (organic priority pollutants), Table III (certain metals, cyanides, and phenols) or Table IV (certain toxic pollutants and hazardous substances); (u) Is listed as a hazardous substance pursuant to section 311(b)(2)(A) of the CWA at 40 CFR 116 4, or (iu) Is a pollutant for which EPA has published acute or chronic water quality criteria (11) 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 Title III of SARA; fertilizers, pesticides; and waste products such as ashes, slag and sludge that have the potential to be released with stormwater discharges (12) 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 11010 and CFR 117.21) or section 102 of CERCLA (Ref. 40 CFR 302 4) (13) 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 (14) Stormwater Discharge Outfall (SDO) Page 18 of 19 Permit NCOOO4944 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 channehzed collection areas, from which stormwater flows directly or indirectly into waters of the State of North Carolina. (15) Stormwater Runoff The flow of water which results from precipitation and which occurs immediately following rainfall or as a result of snowmelt. (16) Total Flow The flow corresponding to the time period over which the sample collection occurs The total flow calculated based on the size of the area draining to the outfall, the amount of the built -upon (impervious) surfaces within the drainage area, and the total amount of rainfall occurring during the sampling period (17) Total Maximum Daily Load (TM U TMDLs are written plans for attaining and maintaining water quality standards, in all seasons, for a specific water body and pollutant (A list of approved TMDLs for the state of North Carolina can be found at http•//deq nc gov/about/divisions/water-resources/planning/modehng-assessment/tmdls. (18) Vehicle Maintenance Activity Vehicle rehabilitation, mechanical repairs, painting, fueling, lubrication, vehicle cleaning operations, or airport deicing operations (19) 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. (20) 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 Page 19 of 19 ,�� , ' I � t :•, � � _ ` 1 "ter � `\• v V . �Jr , l y •� � ✓ 1 --. 1 _ •-/ \ � :, Est � •`4 _' '`�.. •stir 1 `ti• r � J' ` '\ � 0o �l69 1/I, ti V � I � i 1�1 / \'`t-•� I �itl•i \.! �r�f r fir+ ' • � •r ,I ` i f - tiJ SW Outfa115 f I—`...��1� � •'� \ � r� `mil _ •� ` i.,s{1 , `,�...r.✓r t� fi+ 1 p•J• l \ }� _ 7�� UST TA �; c \ � ,l t• ��, � fir: 1��=. f '�--' � ��`' ' , SW Outfall C NPDES Outfa11001 hrQ'� ( _, ek SW Outfall A SW �utfall D SW Outfall B _ f -'�1 s� . • I t' 1r r' � it �\ .�F.• "- �r :- .,- ^ 1 r p_V r �.i j "^t-s�t �. .� 1 �� ~'1 � 1 00 Durafibers Technoliges, Inc. - NC0004944 Facility • Location USGS Quad Name: Salisbury Lat.: 35°42'40" Receiving Stream: North Second Creek Long.: 80°36'10" Stream Class: C North Not to SCALE Subbasin: Yadkin - 030706