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HomeMy WebLinkAboutNC0051322_Draft Permit_20171115Water Resources ENVIRONMENTAL QUALITY November 15, 2017 Mr. Bryce Mendenhall, Vice President of Operations Carolina Water Service, Inc. of North Carolina P.O Box 240908 Charlotte, NC 28224-0908 Dear Permittee: ROY COOPER Gova na MICHAEL S REGAN Sea elary S. JAY ZIMMERMAN Direcloi Subject: Draft NPDES Permit NCO051322 Ashley Hills WWTP Wake County Class WW -2 The Division has reviewed your request to renew the subject permit. Please review this draft carefully to ensure your thorough understanding of the information, conditions, and requirements it contains. The draft permit includes the following significant changes from the existing permit: ➢ Section A. (7.) has been added to require electronic submission of effluent data. Federal regulations require electronic submittal of all discharge monitoring reports (DMRs). ➢ Regulatory citations have been added to the permit. ➢ Removed Post aeration tank and Flow measurement from treatment system equipment list. Updated to two sludge tanks, not three, and update to 42,000 and 28,000 gallons instead of 35, 42, 8s 45,000 gallons. Changed Tertiary sand filter to Tertiary membrane filtration. ➢ Aquatic Toxicology testing language has been updated. ➢ An updated outfall map has been included. With this notification, the Division will solicit public comment on this draft permit by publishing a notice in newspapers having circulation in the general Wake County area, per EPA requirements. Please provide your comments, if any, to me no later than 30 days after receiving this draft permit. 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 any questions concerning this permit, please contact Emily Phillips at (919) 807-6479. Sincere , f 3 Emily Phillips Compliance and Expedited Permitting Unit State of North Carolina I Environmental Quality I Water Resources 1617 Mail Service Center I Raleigh, NC 27699-1617 919 807 6300 919-807-6389 FAX https•//deq nc gov/about/divisions/water-resources/water-resources-permits/wastewater-branch/npdes-wastewater-permits Permit NCO051322 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY DIVISION OF WATER RESOURCES 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, Carolina Water Service, Inc. of NC is hereby authorized to discharge wastewater from a facility located at the Ashley Hills WWTP 320 Woods Run, Knightdale Wake County to receiving waters designated as Poplar Creek in the Neuse River Basin in accordance with effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, III and IV hereof. This permit shall become effective. This permit and authorization to discharge shall expire at midnight on February 28, 2022. Signed this day. DRAFT S. Jay Zimmerman, P.G. Director, Division of Water Resources By Authority of the Environmental Management Commission Page 1 of 12 Permit NCO051322 SUPPLEMENT TO PERMIT COVER SHEET All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby revoked. As of this permit issuance, any previously issued permit bearing this number is no longer effective. Therefore, the exclusive authority to operate and discharge from this facility arises under the permit conditions, requirements, terms, and provisions included herein. Carolina Water Service, Inc. of NC is hereby authorized to: 1. Continue to operate an existing 0.250 MGD wastewater treatment system that includes the following components: ➢ Influent pump station ➢ Bar Screen ➢ Splitter Box ➢ Surge Tank ➢ Diffused aeration basins - 125,000/75,000/50,000 gallon ➢ 3 - Clarifiers - 29,000/10,000/13,200 gallon ➢ Tertiary membrane filtration ➢ 2- Sludge Holding Tanks - 42,000/28,000 gallon ➢ UV Disinfection The facility is located south of Knightdale at the Ashley Hills Subdivision (320 Woods Run) in Wake County. 2. After receiving an Authorization to Construct from the Division, construct and operate a 0.495 MGD wastewater treatment system. 3. Discharge from said treatment works at the location specified on the attached map into Poplar Creek, currently classified C -NSW waters in sub -basin 03-04-02 of the Neuse River Basin. Page 2 of 12 Permit NCO051322 Part I. A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS — (0.25 MGD) [15A NCAC 02B .0400 et seq., 02B .0500 et seq.] During the period beginning on the effective date of this permit and lasting until expansion above 0.25 MGD or expiration, the Permittee is authorized to discharge from outfall 001. Such discharges shall be limited and monitored6 by the Permittee as specified below: EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS Monthly Daily Measurement Sample Sample Parameter Code Average Maximum Frequency Type Location' Total Monthly Flow Monitor & Report Monthly Calculated Influent or Effluent 82220 BOD, 5 -day (20°C) — Summer* 5 0 mg/L 7.5 mg/L 3/Week Composite Effluent C0310 BOD, 5 -day (20°C) — Winter" 10 0 mg/L 15 0 mg/L 3Meek Composite Effluent C0310 Flow 0 25 MGD Continuous Recording Influent or Effluent 50050 Total Suspended Solids 30 0 mg/L 45 0 mg/L 3Meek Composite Effluent C0530 NH3 as N — Summer* 2 4 mg/L 12.0 mg/L 3Meek Composite Effluent C0610 NH3 as N — Winter* g 7 mg/L 35 0 mg/L 3Meek Composite Effluent C0610 Dissolved Oxygen Daily Average > 5 0 mg/L 3/Week Grab Effluent 00300 Fecal Coliform (geometric mean) 200/100 ml 400/100 ml 3Meek Grab Effluent 31616 Total Residual Chlorine2 28 Ng/L 3/Week Grab Effluent 50060 Temperature (°C) Daily Grab Effluent 00010 TKN Monitor & Report (mg/L) Weekly Composite Effluent 00625 NO2-N + NO3-N Monitor & Report (mg/L) Weekly Composite Effluent 00630 TN 3 Monitor & Report (mg/L) 2/Month Composite Effluent C0600 TN Load 4 QM600 Monitor & Report (Ib/month) Monthly Calculated Effluent QY600 Monitor & Report (Ib/year) Annually Calculated Effluent Total Phosphorus 5 Monitor & Report (mg/L) 2/Month Composite Effluent C0665 pH Not < 6.0 nor > 9 0 00400 Standard Units Meekly Grab Effluent Dissolved Oxygen Daily Average > 5 0 mg/L 3Meek Grab Upstream & 00300 1 1 Downstream Temperature (°C) 3/Week Grab Upstream & 00010 Downstream Page 3 of 12 Permit NCO051322 *Summer. Apnl 1 - October 31; *Winter. November 1 - March 31 Footnotes: 1. Upstream - at least 200 feet upstream from the outfall. Downstream - at NCSR 2049. 2. The TRC limit and monitoring requirements apply only if chlorine is used for disinfection The Division shall consider all effluent TRC values reported below 50 µg/L to be in compliance with the permit. However, the Permittee shall continue to record and submit all values reported by a North Carolina certified laboratory (including field certified), even if these values fall below 50 µg/L. 3. For a given wastewater sample, TN = TKN + NO2-N + NO3-N, where TN is Total Nitrogen and TKN is Total Kjeldahl Nitrogen. 4. TN Load is the mass load of Total Nitrogen discharged in a given period of time [see condition A. (4)]. Compliance with this limit shall be determined in accordance with condition A. (5) and A. (6). 5. The quarterly average for total phosphorus shall be the average of composite samples collected during each calendar quarter (January -March, April -June, July -September, October -December). 6. The Permittee shall submit discharge monitoring reports electronically using the Division's eDMR system [see A. (7.)] THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS. Page 4 of 12 Permit NCO051322 A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS — (0.495 MGD) [15A NCAC 02B .0400 et seq., 02B .0500 et seq.] During the period beginning upon expansion above 0.25 MGD and lasting until expiration, the Permittee is authorized to discharge from outfall 001. Such discharges shall be limited and monitored6 by the Permittee as specified below: EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS Monthly Daily Measurement Sample Type Sample Parameter Code Average Maximum Frequency Location' Flow 50050 0 495 MGD Weekly Instantaneous Influent or Effluent Total Monthly Flow Monitor & Report Monthly Calculated Influent or Effluent 82220 BOD, 5 -day (20°C) — Summer* 5 0 mg/L 7.5 mg/L 3Meek Composite Effluent C0310 BOD, 5 -day (20°C) — Winter* 10.0 mg/L 15 0 mg/L 3Meek Composite Effluent C0310 Total Suspended Solids 30 0 mg/L 45 0 mg/L 3/Week Composite Effluent C0530 NH3 as N — Summer* 1.7 mg/L 8.5 mg/L 3/Week Composite Effluent C0610 NH3 as N — Winter* 5 3 mg/L 26 mg/L 3Meek Composite Effluent C0610 Dissolved Oxygen Daily Average > 5 0 mg/L 3/Week Grab Effluent 00300 — Fecal Coliform (geometric mean) 200/100 ml 400/100 ml 3Meek Grab Effluent 31616 Total Residual Chlorine 28 pg/L 3Meek Grab Effluent 50060 Temperature (°C) Daily Grab Effluent 00010 TKN Monitor & Report (mg/L) Weekly Composite Effluent 00625 NO2-N + NO3-N Monitor & Report (mg/L) Weekly Composite Effluent _ 00630 TN4 Monitor & Report (mg/L) 2/Month Composite Effluent C0600 TN Load 4 QM600 Monitor & Report (Ib/month) Monthly Calculated Effluent QY600 5,055 Ib/year (annual load) Annually Calculated Effluent Total Phosphorus6 1.0 mg/L (Monthly Average) Weekly Composite Effluent C0665 pH Not < 6 0 nor > 9.0 3/Week Grab Effluent 00400 Standard Units Dissolved Oxygen 3/Week Grab Upstream & 00300 Downstream Temperature (°C) 3Meek Grab Upstream & 00010 1 1 Downstream *Summer Apnl 1 — October 31; *Winter. November 1 — March 31 Page 5 of 12 Permit NCO051322 Footnotes: 1. Upstream - at least 200 feet upstream from the outfall. Downstream - at NCSR 2049. 2. The TRC limit and monitoring requirements apply only if chlorine is used for disinfection. The Division shall consider all effluent TRC values reported below 50 µg/ L to be in compliance with the permit. However, the Permittee shall continue to record and submit all values reported by a North Carolina certified laboratory (including field certified), even if these values fall below 50 µg/L. 3. For a given wastewater sample, TN = TKN + NO2-N + NO3-N, where TN is Total Nitrogen and TKN is Total Kjeldahl Nitrogen. 4. TN Load is the mass load of Total Nitrogen discharged in a given period of time [see condition A. (4)]. Compliance with this limit shall be determined in accordance with condition A. (5) and A. (6). Upon expansion the annual load limit will go into effect after January 1 of the following year. 5. The quarterly average for total phosphorus shall be the average of composite samples collected during each calendar quarter (January -March, April -June, July -September, October -December). 6. The Permittee shall submit discharge monitoring reports electronically using the Division's eDMR system [see A. (7.)]. THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IlV OTHER THAN TRACE AMOUNTS. A. (3.) REOPENER CLAUSE: [G. S 143-215.1(b)] The Division may reopen this permit to increase monitoring, add additional parameters of concern, and/or implement additional limits should effluent data or surface water data indicate potential impacts, or should further information on radiological components become available. A. (4.) CALCULATION OF TOTAL NITROGEN LOADS [G.S 143-215.1(b)] a. The Permittee shall calculate monthly and annual TN Loads as follows: i. Monthly Total Nitrogen (TN) Load (pounds/month) = TN x TMF x 8.34 Where: TN = average TN concentration (mg/L) of the composite samples collected during the month TMF = Total Monthly Flow of wastewater discharged during the month (MG/month) 8.34 = conversion factor, from (mg/L x MG) to pounds ii. Annual TN Load (pounds/year) = Sum of the 12 Monthly TN Loads for the calendar year b. The Permittee shall report monthly Total Nitrogen results (mg/L and pounds/month) in the discharge monitoring report for that month and shall Page,6 of 12 Permit NC0051322 report each year's annual results (pounds/year) in the December report for that year. A. (5.) ANNUAL LIMITS FOR TOTAL NITROGEN [G.S 143-215.1(b)] a. Total Nitrogen (TN) allocations and TN Load limits for NPDES dischargers in the Neuse River basin are annual limits and are applied for the calendar year. b. For any given calendar year, the Permittee shall be in compliance with the annual TN Load limit in this Permit if: i. the Permittee's annual TN Load is less than or equal to said limit, or ii. the Permittee is a Co -Permittee Member of a compliance association. c. The TN Load limit in this Permit (if any) may be modified as the result of allowable changes in the Permittee's TN allocation. i. Allowable changes include those resulting from purchase of TN allocation from the Wetlands Restoration Fund; purchase, sale, trade, or lease of allocation between the Permittee and other dischargers; regionalization; and other transactions approved by the Division. ii. The Permittee may request a modification of the TN Load limit in this Permit to reflect allowable changes in its TN allocation. Upon receipt of timely and proper application, the Division will modify the permit as appropriate and in accordance with state and federal program requirements. iii. Changes in TN limits become effective on January 1 of the year following permit modification. The Division must receive application no later than August 31 for changes proposed for the following calendar year. iv. Application shall be sent to: NCDEQ/DWQ/NPDES Attn: Neuse River Basin Coordinator 1617 Mail Service Center Raleigh, NC 27699-1617 d. If the Permittee is a member and co -permittee of an approved compliance association, its TN discharge during that year is governed by that association's group NPDES permit and the TN limits therein. i. The Permittee shall be considered a Co -Permittee Member for any given calendar year in which it is identified as such in Appendix A of the association's group NPDES permit. ii. Association roster(s) and members' TN allocations will be updated annually and in accordance with state and federal program requirements. iii. If the Permittee intends to join or leave a compliance association, the Division must be notified of the proposed action in accordance with the procedures defined in the association's NPDES permit. Page 7 of 12 Permit NCO051322 (1) Upon receipt of timely and proper notification, the Division will modify the permit as appropriate and in accordance with state and federal program requirements. (2) Membership changes in a compliance association become effective on January 1 of the year following modification of the association's permit. e. The TN monitoring and reporting requirements in this Permit remain in effect until expiration of this Permit and are not affected by the Permittee's membership in a compliance association. A. (6.) TOTAL NITROGEN ALLOCATIONS [G.S 143-215.1(b)] a. The following table lists the Total Nitrogen (TN) allocation(s) assigned to, acquired by, or transferred to the Permittee in accordance with the Neuse River nutrient management rule (T15A NCAC 02B .0234) and the status of each as of permit issuance. For compliance purposes, this table does not supersede any TN limit(s) established elsewhere in this permit or in the NPDES permit of a compliance association of which the Permittee is a Co -Permittee Member. Footnote: (1) Transport Factor = 50% i. Any addition, deletion, or modification of the listed allocation(s) (other than to correct typographical errors) or any change to Active status of any of the listed allocations shall be considered a major modification of this permit and shall be subject to the public review process afforded such modifications under state and federal rules. A. (7.) ELECTRONIC REPORTING OF DISCHARGE MONITORING REPORTS [NCGS 143-215.1(b)] 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. Page 8 of 12 ALLOCATION AMOUNT (1) ALLOCATION SOURCE DATE STATUS TYPE Estuary (Ib/yr) Discharge (Ib/yr) Base Assigned by Rule 12/7/97, 2,528 5,055 Active (T1 5A NCAC 02B .0234) 4/1/03 TOTAL 2,528 5,055 Active Footnote: (1) Transport Factor = 50% i. Any addition, deletion, or modification of the listed allocation(s) (other than to correct typographical errors) or any change to Active status of any of the listed allocations shall be considered a major modification of this permit and shall be subject to the public review process afforded such modifications under state and federal rules. A. (7.) ELECTRONIC REPORTING OF DISCHARGE MONITORING REPORTS [NCGS 143-215.1(b)] 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. Page 8 of 12 Permit NCO051322 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.) (all 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 DENR / 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, 1. 1, 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 monitonng 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 9 of 12 Permit NCO051322 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: / /www.federalregister.gov/ documents /2015 / 10 /22 /2015-24954 /national-pollutant- discharge-elimination-system-np des-electronic-reportmg-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: / / deg.nc. gov /about/ divisions /water -resources / edmr 4. Signatory Requirements jSupplements 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. (11.) (a) or by a duly authorized representative of that person as described in Part II, Section B. (11.)(b). A person, and not a position, must be delegated signatory authority for eDMR reporting purposes. Page 10 of 12 Permit NC0051322 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://deg.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 122.221. 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." 5. Records Retention [Supplements Section D. (6.11 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 11 of 12 FACT SHEET EXPEDITED - PERMIT RENEWAL NCO051322 — Class 2 Basic Information for Expedited Permit Renewals Permit Writer/Date Emily Phillips / NPDES / October 27, 2017 Permit Number - Class NCO051322 — Class 2 Flow 0.250 MGD [2980 people] Owner Carolina Water Service, Inc. of NC Facility Name Ashley Hills WWTP Type of Waste 100 % domestic Basin Name/Sub-basin number Neuse River Basin / 03-04-02 Receiving Stream Poplar Creek [segment 27-35] Stream Classification in Permit C; NSW Does permit need Daily Max NH3 limits? No Does permit need TRC limits/language? No Does permit have toxicity testing? No Does permit have Special Conditions? No Does permit have instream monitoring? Yes, DO & Temperature Is the stream impaired (on 303(d) list)? No Any obvious compliance concerns? No Any permit MODS since last permit? No Requests for Renewal Received July 19, 2017 New expiration date February 28, 2022 Changes to current permit? Updated map, added eDMR language, & added regulatory citations Data Review -- Reviewed BIMS data from 2012 through present. A couple of enforcements for limit violations and numerous violations for daily maximums of BOD and Fecal Coliform, which all proceeded to NOVs.