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HomeMy WebLinkAboutNC0056065_Draft Permit_20240709ROY COOPER Governor ELIZABETH S. BISER Secretary RICHARD E. ROGERS, JR. Dfrector David Pharr NCDOT Marine Maintenance Facility 8550 Shipyard Road Manns Harbor, NC 27953 Dear Mr. Pharr: NORTH CAROLINA Environmental Quality July 9, 2024 Subject: Draft NPDES Permit NC0056065 DOT Marine Maintenance Facility WTP Grade I Physical Chemical WPCS Dare County Attached with this letter is a copy of the Draft NPDES permit renewal for your facility. Please review this draft carefully to ensure thorough understanding of the requirements and conditions it contains. There are a few changes in the draft attached here from the existing permit. These changes are summarized below. • Regulatory Citations - Language has been added where necessary in the permit to provide regulatory citations for permit requirements. • Electronic Reporting - Permit language has been modified to be consistent with the finalization of federal requirements for electronic reporting. • Language on the Supplement to Permit Cover Sheet has been updated. This includes modification of the treatment system components and update of the maximum monthly average flow. This page has also been updated to include Outfall 002 back into the permit. This outfall is for the discharge of wastewater from your vessel washing activities. The outfall location is set at the overflow spillway for the onsite infiltration device as recently discussed in emails with Brian Doliber. • Duration of Flow — This parameter has been added to the Effluent Tables and should be reported through the eDMR system along with total flow. In addition, the frequency for reporting flow has been updated to Once per Discharge. 0 Compliance Schedule — The compliance schedule for limits for copper, zinc and lead has been removed since the timeframe has ended and these limits are now in effect. • Outfall 002 Effluent Table — A second effluent table [A.(2.)] has been included in the permit to address effluent discharge requirements for this outfall. Please note that the Division recognizes that discharge may occur infrequently at this outfall. When there is no flow, you must still report "No Flow" in the eDMR system for this outfall. D ��� North Carolina Department of Environmental Quality I Division of Water Resources 512 North Salisbury Street 1 1617 Mail Service Center I Raleigh, North Carolina 27699-1617 o vn:, ..i,;."'. �., � 06,arem—f en.w— —Mi n-", 919.707.9000 David Pharr NCDOT Marine Maintenance Facility WTP Draft Renewal Page 2 Practical Quantitation Limits (PQL) — Language has been added in notes below the effluent tables to remind the permittee that in your laboratory analyses all PQLs must be sufficiently sensitive considering the respective water quality standard for each parameter. Your total copper monthly average limitation is 1.85 µg/L. The Division's laboratory identifies the target PQL for total copper as 2.0 µg/L. 15A NCAC 2B .0505 (e) (4) requires that all test procedures must produce detection and reporting levels that are below the permit discharge requirements and all data generated must be reported to the approved detection level or lower reporting level of the procedure. DOT should use sufficiently sensitive test methods for all pollutants. While the Division has identified a target PQL greater than the proposed copper limit, you are encouraged to pursue a laboratory capable of achieving a PQL below the proposed copper limit, if possible, in your area. • Whole Effluent Toxicity (WET) — Whole Effluent Toxicity has been updated and includes an email for submittal of the AT forms. • Units of Measure — Please assure that your eDMR values are reported in the appropriate units of measure as outlined in the permit [see Effluent Tables Section A.(1) and A.(2)]. • Special Operating Conditions — Special Condition A. (4.) has been added to the permit to address requirements for the installation of an oil /water separator and implementation of source reduction and pollution prevention measures in the vessel washing area. • Map Update — The permit map and descriptive information on the permit map have been updated. • Permit Expiration — Date has been changed to September 30, 2029 to allow for a full permit term. Please note that the receiving stream for Outfall 001, Spencer Creek, is listed as impaired in the 2022 NC 303(d) Impaired Waters Integrated Report. Impairment is for Shellfish Harvesting. Addressing impaired waters is a high priority for the Division, and instream data will continue to be evaluated. If there is noncompliance with permitted effluent limits and instream impairment can be attributed to your facility, then mitigative measures may be required. The NPDES standard conditions (Parts II, III, and IV) that are a part of the permit are not included in this draft document (cover, map, and Part I). The conditions are the same as in your current permit. The latest version of the standard conditions is available at https://bit.ly/3k5NFaL and can be viewed online or downloaded as a PDF file. Concurrent with this notification the Division is publishing a notice in a newspaper having general circulation in the Dare County area soliciting public comments on this draft permit. Please provide any written comments you may have to me no later than 30 days after receipt of this draft permit. David Pharr NCDOT Marine Maintenance Facility WTP Draft Renewal Page 3 Following the 30-day public comment period, the Division will review all pertinent comments and take appropriate action prior to issuing a final permit. If you have questions concerning this draft permit, please contact me by email at bradley.bennett@deq.nc.gov. At this time, contact by email is the most effective method. If we need to set up a call to discuss any issues, we can set that up through email. Sincerely, 2-11, 1=1 Bradley Bennett Compliance and Expedited Permitting Unit cc: NPDES Files — electronic Washington Regional Office / Water Quality — electronic Operator Certification Program/Jeffrey Talbott — electronic Aquatic Toxicology / Cindy Moore and Molly Nicholson - Electronic NC Wildlife Resources Commission / Maria Dunn — electronic US Fish and Wildlife / Pete Benjamin; Jennifer Archambault — electronic Shellfish Sanitation / Andrew Haines; Erin Bryan-Millush; Jeremy Humphrey — electronic Brian Doliber / NCDOT - electronic Draft NPDES Permit NCO056065 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY DIVISION OF WATER RESOURCES PERMIT TO DISCHARGE WASTEWATER UNDER THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM PDES 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, the North Carolina Department of Transportation is hereby authorized to discharge wastewater from a facility located at the Marine Maintenance Facility 8550 Shipyard Road, Manns Harbor 27953 Dare County to receiving waters designated as Spencer Creek and Croatan Sound in the Pasquotank River Basin in accordance with effluent limits, monitoring requirements, and other conditions set forth in Parts I, II, and III hereof. This permit shall become effective This permit and authorization to discharge shall expire at midnight on September 30, 2029. If the permittee intends to continue discharging at the facility beyond the term of this permit, a renewal application must be submitted no later than April 3, 2029 (180 days before the expiration of this permit) Signed this day John Hennessy, Regional Operations Section Chief Division of Water Resources By Authority of the Environmental Management Commission Page 1 of 10 Draft NPDES Permit NCO056065 SUPPLEMENT TO PERMIT COVER SHEET All previous NPDES Permits issued to this facility, whetherfor operation or discharge are hereby revoked. As of this permit issuance, any previously issued permit bearing this number is no longer effective. Therefore, the exclusive authority to operate and discharge from this facility arises under the permit conditions, requirements, terms, and provisions included herein. The North Carolina Department of Transportation is hereby authorized to: 1. Continue to operate a combined greensand and ion exchange technology water treatment plant with discharge of media filter backwash and regeneration wastewaters to Outfall 001. The water treatment plant has a design potable water capacity of 0.005 MGD and a maximum monthly average wastewater discharge of 0.085 MGD (from reported DMR data). The water and wastewater systems utilize the following components: • Greensand Filters (with potassium permanganate) • Ion Exchange Softeners (with sodium chloride to remove hardness) • Disinfection with sodium hypochlorite • Filters and softeners backwashed with non -chlorinated water • Regeneration water for softeners has brine added 2. Continue to discharge wastewater from vessel wash water and other similar wastewaters to Outfall 002. The facility is located at the DOT Marine Maintenance Facility, 8550 Shipyard Road, Maims Harbor, Dare County. 3. Discharge from said treatment works at the location specified on the attached map via Outfall 001 into Spencer Creek [Stream Index: 30-20-3], and via Outfall 002 into the Croatan Sound [Stream Index: 30-20-(2)] both waters currently classified as SA;HQW waters within the Pasquotank River Basin and HUC - 030102051406. Page 2 of 10 Draft NPDES Permit NCO056065 PART I A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [15A NCAC 02B .0400 et seq., 02B .0500 et seq.] Grade I Physical Chemical Water Pollution Control System [15A NCAC 08G .0306] During the period beginning on the effective date of this permit and lasting until expiration, the Permittee is authorized to discharge filter backwash and regeneration wastewater from outfall 001. Such discharges shall be limited, monitored and reported' by the Permittee as specified below: EFFLUENT CHARACTERISTIC [PARAMETER CODES] LIMITS MONITORING REQUIREMENTS' Monthly Average Daily Maximum Measurement Frequency Sample Type Sample Location z Flow (MGD) 3 50050 Monitor & Report Once per Discharge Instantaneous E Duration of Flow (hours) 81381 Monitor & Report Once per Discharge Instantaneous E Total Residual Chlorine (µg/L) 4 50060 13 µg/L 4 2/Month Grab E PH (su) 00400 Not < 6.8 or > 8.5 standard units 2/Month Grab E Total Suspended Solids (TSS) (mg/L) C0530 30.0 mg/L 45.0 mg/L 2/Month Composite E Turbidity (NTU) 00070 Monitor & Report Monthly Grab E Temperature (°C) 00010 Monitor & Report Monthly Grab E Dissolved Oxygen (DO) (mg/L) 00300 Monitor & Report Monthly Grab E PH (su) 00400 Monitor & Report Monthly Grab S1 Dissolved Oxygen (DO) (mg/L) 00300 Monitor & Report Monthly Grab S1 Temperature (°C) 00010 Monitor & Report Monthly Grab S1 Salinity (ppth) 00480 Monitor & Report Monthly Grab S1 Conductivity (umhos/cm) 00094 Monitor & Report Monthly Grab S1 Total Dissolved Solids (TDS) (mg/L) 70295 Monitor & Report Monthly Composite E Salinity (ppth) 00480 Monitor & Report Monthly Composite E Conductivity (umhos/cm) 00094 Monitor & Report Monthly Composite E Total Chloride (mg/L) 00940 Monitor & Report Monthly Composite E Total Copper (µg/L) 01042 1.85 µg/L 2.90 µg/L Monthly Composite E Total Lead (µg/L) 01051 4.25 µg/L 110.4 µg/L Monthly Composite E Total Zinc (µg/L) 01092 42.8 µg/L 47.6 µg/L Monthly Composite E Ammonia Nitrogen (NH3) (mg/L) C0610 Monitor & Report Monthly Composite E Acute WET Testing 5 TGE3E Monitor & Report Quarterly Composite E Footnotes: 1. The Permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application system. See Condition A. (5). 2. E = Effluent; S 1 = end of ship mooring berth at Spencer Creek. 3. For instantaneous flow monitoring, the duration of the discharge must be reported in addition to the total flow. Footnotes continued on next page Page 3 of 10 Draft NPDES Permit NCO056065 Footnotes Continued: 4. Limit and monitor apply only if the facility adds chlorine or a chlorine derivative to water that is eventually discharged. The Division shall consider TRC effluent values reported below 50 µg/L to be compliant with the permit. However, the Permittee shall continue to record and submit all values reported by a North Carolina - certified test method (including field certified), even if these values fall below 50 µg/L. 5. Acute WET Testing: Mysid (Mysidopsis Bahia), 24-hour static test, pass/fail, monitoring only, test at 90% in January, April, July, and October. See Condition A. (3). Conditions: • All samples shall be collected during a softener wastewater discharge event. • The permittee shall collect all samples during a representative discharge event. • There shall be no discharge of floating solids or foam visible in other than trace amounts. • All practical quantitation limits (PQL) must be sufficiently sensitive considering the respective water quality standard for each parameter [see Part II. Section D. (4)]. A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [15A NCAC 02B .0400 et seq., 02B .0500 et seq.] Grade I Physical Chemical Water Pollution Control System [15A NCAC 08G .0306] During the period beginning on the effective date of this permit and lasting until expiration, the Permittee is authorized to discharge washwater from outfall 002. Such discharges shall be limited, monitored and reported' by the Permittee as specified below: EFFLUENT CHARACTERISTIC [PARAMETER CODES] LIMITS MONITORING REQUIREMENTS' Monthly Average Daily Maximum Measurement Frequency Sample Type Sample Location Flow (MGD) 2 50050 Monitor & Report Once per Discharge Instantaneous E Duration of Flow (hours) 81381 Monitor & Report Once per Discharge Instantaneous E Total Residual Chlorine (µg/L) 3 50060 13 µg/L 3 2/Month Grab E PH (su) 00400 Not < 6.8 or > 8.5 standard units 2/Month Grab E Total Suspended Solids (TSS) (mg/L) C0530 30.0 mg/L 45.0 mg/L 2/Month Composite E Turbidity (NTU) 00070 Monitor & Report Monthly Grab E Oil and Grease (mg/L) 00552 Monitor & Report Monthly Grab E Total Copper (µg/L) 01042 Monitor & Report Monthly Composite E Total Lead (µg/L) 01051 Monitor & Report Monthly Composite E Total Zinc (µg/L) 01092 Monitor & Report Monthly Composite E Total Aluminum (µg/L) 01105 Monitor & Report Monthly Composite E Acute WET Testing 4 TGE3E Monitor & Report Quarterly Composite E Footnotes: 1. The Permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application system. See Condition A. (5). 2. For instantaneous flow monitoring, the duration of the discharge must be reported in addition to the total flow. Page 4 of 10 Draft NPDES Permit NCO056065 Footnotes Continued: 3. Limit and monitor only if the facility adds chlorine or a chlorine derivative to water that is eventually discharged. The Division shall consider TRC effluent values reported below 50 µg/L to be compliant with the permit. However, the Permittee shall continue to record and submit all values reported by a North Carolina - certified test method (including field certified), even if these values fall below 50 µg/L. 4. Acute WET Testing: Mysid (Mysidopsis Bahia), 24-hour static test, pass/fail, monitoring only, test at 90% in January, April, July, and October. See Condition A. (3.). Conditions: • The permittee shall collect all samples during a representative discharge event. • There shall be no discharge of floating solids or foam visible in other than trace amounts. • All practical quantitation limits (PQL) must be sufficiently sensitive considering the respective water quality standard for each parameter [see Part H. Section D. (4.)]. A. (3.) ACUTE TOXICITY PASS/FAIL MONITORING ONLY (QUARTERLY) [15A NCAC 02B .0200 et seq.] [15A NCAC 02B .0500 et seq.] The permittee shall conduct acute toxicity tests on a quarterly basis using protocols defined in the North Carolina Procedure Document entitled "Pass/Fail Methodology for Determining Acute Toxicity In A Single Effluent Concentration" (Revised -December 2010, or subsequent versions). The monitoring shall be performed as a Mysid Shrimp (Mysidopsis bahia) 24-hour static test. The effluent concentration at which there may be at no time significant acute mortality is 90% (defined as treatment two in the procedure document). The tests will be performed during the months of January, April, July and October. These months signify the first month of each three-month toxicity testing quarter assigned to the facility. Effluent sampling for this testing must be obtained during representative effluent discharge and shall be performed at the NPDES permitted final effluent discharge below all treatment processes. All toxicity testing results required as part of this permit condition will be entered electronically using the Division's eDMR system for the month in which it was performed, using the parameter code TGE3E. Additionally, DWR Form AT-2 (original) is to be sent to the following address: North Carolina Division of Water Resources Water Sciences Section/Aquatic Toxicology Branch 1621 Mail Service Center Raleigh, NC 27699-1621 Or, results can be sent to the email, ATForms.ATBgdeq.nc.gov. 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 Page 5 of 10 Draft NPDES Permit NCO056065 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, then monthly monitoring will begin immediately. Upon submission of a valid test, this monthly test requirement will revert to quarterly in the months specified above. Should any test data from either these monitoring requirements 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 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. A. (4.) SPECIAL OPERATING CONDITIONS [G.S. 143-215.1(b) et seq.] (a.) The permittee shall work with Washington Regional Office staff to establish a timeframe for the installation of an oil/water separator to handle wastewater flow from the vessel washing area prior to discharge to the infiltration device. Installation of the oil/water separator shall occur no later than two years from the effective date of this permit. (b.) The permittee shall review all source reduction and pollution prevention alternatives to minimize pollutants available for transport from the vessel washing area. This activity may be addressed in conjunction with the facility's implementation of the Stormwater Pollution Prevention Plan under their NPDES Industrial Stormwater Coverage (NCS00250). A. (5.) ELECTRONIC REPORTING OF DISCHARGE MONITORING REPORTS [G.S. 143-215.1(b) et seq.] Federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and program reports. 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.) Signatory Requirements • Section D. (2.) Reporting • Section D. (6.) Records Retention • Section E. (5.) Monitoring Reports 1. Reporting Requirements [Supersedes Section D. (2.) and Section E. (5.) (a)l The permittee shall report discharge monitoring data electronically using the NC DWR's Electronic Discharge Monitoring Report (eDMR) internet application. Page 6 of 10 Draft NPDES Permit NC0056065 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. The eDMR system may be accessed at: https://deq.ne.gov/about/divisions/water-resources/edmr. 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, 1.1, 2, 3) or alternative forms approved by the Director. Duplicate signed copies shall be submitted 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 See "How to Request a Waiver from Electronic Reporting" section below. Monitoring results obtained during the previous month(s) shall be summarized for each month and reported via the eDMR system no later than the last calendar day of the month following the completed reporting period. 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, 2025, 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). 2. Electronic Submissions In accordance with 40 CFR 122.41(1)(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: hops://www.federalre ig ster.gov/documents/2015/10/22/2015- 24954/national-pollutant-discharge-elimination-system-npdes-electronic-reporting-rule Page 7 of 10 Draft NPDES Permit NC0056065 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)1 All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part II, Section B. (I 1.)(a) or by a duly authorized representative of that person as described in Part II, Section B. (I 1.)(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.nc.gov/about/divisions/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 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 penalties for submitting false information, including the possibility of fines and imprisonment for knowing violations. " Page 8 of 10 Draft NPDES Permit NCO056065 5. Records Retention [Supplements Section D. (6.)l 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]. Page 9 of 10 -point DOT Marine Maintenance Facility Outfall 001 51 35' 52: 12' 75o 45 20" 4:, 446 L6 lj&� -6 -616 -.L 416 AL J.6 -.I- -6L6 446 A& J&- _6i�. 446 -L6. J& 44L 46 4 -LV 4J_ 1- NC Department of Transportation Marine Maintenance Facility WTP River Basin- Pasquotank Sub -Basin: 03-01-51 Outfall 001: 35' 52' 18"/75° 45' 19" Stream: Spencer Creek 30-20-3 Outfall 002. 35' 52' 11"/ 75' 45' 10" Stream: Croatan Sound 30-20-(2) Stream Class: SA; HQW HUC: 030102051406 Grid/Quad: D35SE / East Lake SW County: Dare Outfall 002 Facility Location (not to scale) North NPDES Permit NCO056065 Page 10 of 10