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HomeMy WebLinkAboutNC0061638_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 Gonei na MICHAEL S REGAN Sea elary S JAY ZIMMERMAN Du ectoi Subject: Draft NPDES Permit NCO061638 Amherst 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. (6.) 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. ➢ Dual sludge drying beds, dual aerated sludge holding tanks, dual post aeration tanks with dual blowers, recording flow meter, and ferric sulfate feed removed from treatment system equipment list. ➢ An updated outfall map has been included. Please note that Middle Creek is listed as an impaired waterbody on the North Carolina 303(d) Impaired Waters List. Addressing impaired waters is a high priority with the Division, and instream data will continue to be evaluated. If there is noncompliance with permitted effluent limits and stream impairment can be attributed to your facility, then mitigative measures may be required. 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. 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 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 , Emily Phillips Compliance and Expedited Permitting Unit cc: NPDES files Permit NCO061638 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 provision 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 Amherst WWTP 4917 Johnston Pond Road Apex Wake County to receiving waters designated as Middle Creek in sub -basin 03-04-03 of 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 April 30, 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 11 Permit NCO061638 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 0.046 MGD wastewater treatment system which includes the following components: ➢ Influent pump station ➢ Bar screen ➢ Dual train aeration basins [ 12 at 5,000 gallons each] ➢ Dual clarifiers [6,200 gallons each] ➢ Tertiary filter ➢ Dual hypochlorinator ➢ Dechlorinator The facility is located south of Raleigh at the Amherst WWTP (4917 Johnston Pond Road, Apex) in Wake County. 2. After receiving an Authorization to Construct permit from the Division, increase treatment capacity to 0.053 MGD. 3. Discharge from said treatment works at the location specified on the attached map into Middle Creek, currently classified C; NSW waters in hydrologic unit 03020201 of the Neuse River Basin. Page 2 of 11 Permit NCO061638 Part I. A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - (0.046 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 0.046 MGD or expiration, the Permittee is authorized to discharge from outfall 001. Such discharges shall be limited and monitored -5 by the Permittee as specified below: PARAMETER Parameter Code] LIMITS MONITORING REQUIREMENTS Monthly Average Daily Maximum Measurement Frequency Sample Type Sample Location' Flow 50050 0.046 MGD Continuous Recording Influent or Effluent Total Monthly Flow [822201 Monitor & Report Monthly Calculated Influent or 1 Effluent BOD, 5 -day (20°C) [00310] (April 1— October 31 5.0 mg/L 7.5 mg/L Weekly Composite Effluent BOD, 5 -day (20°C) P031 0] November 1— March 31 10 0 mg/L 15.0 mg/L Weekly Composite Effluent Total Suspended Solids 00530 30.0 mg/L 45.0 mg/L Weekly Composite Effluent NH3 as N [00610] (April 1 —October 31 2 0 mg/L 10.0 mg/L Weekly Composite Effluent NH3 as N P061 0] November 1— March 31 4.0 mg/L 20.0 mg/L Weekly Composite Effluent Dissolved Oxygen 00300 Daily avera e > 5.0 m /L Weekly Grab Effluent Dissolved Oxygen 00300 Weekly Grab U & D Fecal Coliform [31616] (geometric mean 200 / 100 ml 400 / 100 ml Weekly Grab Effluent Total Residual Chlorine2 50060 28 Hg/L 2/Week Grab Effluent Temperature °C 00010 Daily Grab Effluent Temperature °C 00010 Weekly Grab U & D TKN (mg/L 00625 Monitor & Report 2/Month Composite Effluent NO2-N + NO3-N (mg/L 00630 Monitor & Report 2/Month Effluent Total Nitrogen m /L 3 00600 Monitor & Report 2/Month -Composite Composite Effluent Total Nitrogen Load4 [00600] Monitor & Report (pounds/month) Monitor & Report (pounds/year) Monthly Annually Calculated Calculated Effluent Effluent Total Phosphorus (mg/L 00665 Monitor & Report 2/Month Composite Effluent H 00400 > 6.0 and < 9.0 standard units Weekly Grab Effluent Page 3 of 11 Permit NC0061638 Footnotes - 1. U: Upstream from the outfall. D: downstream from the outfall. 2. The facility shall report all effluent TRC values reported by a NC certified laboratory (including field certified laboratories) However effluent values < 50 µg/L will be treated as zero for compliance purposes. 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 A. (3)]. Compliance with this limit shall be determined in accordance with A. (4). 5 The Permittee shall submit discharge monitoring reports electronically using the Division's eDMR system [see A. (6 )]. There shall be no discharge of floating solids or visible foam in other than trace amounts. Page 4 of 11 Permit NCO061638 A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - (0.053 MGD) [15A NCAC 02B .0400 et seq., 02B .0500 et seq.] During the period beginning upon expansion to 0.053 MGD and lasting until expiration, the Permittee is authorized to discharge from outfall 001. Such discharges shall be limited and monitored5 by the Permittee as specified below: Footnotes: 1. U: Upstream from the outfall. D: downstream from the outfall. 2. The facility shall report all effluent TRC values reported by a NC certified laboratory (including field certified laboratories). However effluent values < 50 µg/L will be treated as zero for compliance purposes. Page 5 of 11 LIMITS MONITORING REQUIREMENTS PARAMETER Monthly Daily Measurement Sample Sample Average Maximum Frequency Type Location' [Parameter Code] Flow 0.053 MGD Continuous RecordingInfluent or Effluent 50050 Total Monthly Flow Monitor & Report Monthly Calculated Influent or 82220 Effluent BOD, 5 -day (20°C) [00310] 5.0 mg/L 7.5 mg/L Weekly Composite Effluent (April 1— October 31 BOD, 5 -day (20°C) [00310] 10.0 mg/L 15.0 mg/L Weekly Composite Effluent November 1— March 31 Total Suspended Solids 30 0 mg/L 45.0 mg/L Weekly Composite Effluent 00530 NH3 as N [00610] 2.0 mg/L 10.0 mg/L Weekly Composite Effluent (April 1— October 31 NH3 as N [00610] 4.0 mg/L 20 0 mg/L Weekly Composite Effluent November 1— March 31 Dissolved Oxygen 00300 Daily avera e > 5.0 m /L Weekly Grab Effluent Dissolved Oxygen 00300 Weekly Grab U & D Fecal Coliform [31616] 200 / 100 ml 400 / 100 ml Weekly Grab Effluent (geometric mean Total Residual Chlorine2 28 pg/L 2/Week Grab Effluent 50060 Temperature °C 00010 - Daily Grab Effluent Temperature °C 00010 Weekly Grab U & D TKN (mg/L 00625 Monitor & Report 2/Month Composite Effluent NO2-N + NO3-N (mg/L 00630 Monitor & Report 2/Month Composite Effluent Total Nitrogen m /L 3 00600 Monitor & Report 2/Month Composite Effluent Monitor & Report (pounds/month) Monthly Calculated Effluent Total Nitrogen Load4 [00600] 1,072 ounds/ ear Annually Calculated Effluent Total Phosphorus (mg/L) [006651 1.0 m /L I 2/Month Composite__[__[ Effluent H 00400 > 6 0 and < 9.0 standard units Weekly Grab Effluent Footnotes: 1. U: Upstream from the outfall. D: downstream from the outfall. 2. The facility shall report all effluent TRC values reported by a NC certified laboratory (including field certified laboratories). However effluent values < 50 µg/L will be treated as zero for compliance purposes. Page 5 of 11 Permit NCO061638 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 special condition A. (3.), Calculation of TN Loads. Compliance with this limit shall be determined in accordance with special condition A.(4.) of this permit, Compliance with Annual Limits for Total Nitrogen. 5. The Permittee shall submit discharge monitoring reports electronically using the Division's eDMR system [see A. (6.)]. There shall be no discharge of floating solids or visible foam in other than trace amounts. A. (3.) CALCULATION OF TOTAL NITROGEN (TN) LOADS [G.S. 143-215.1(b)] a. The Permittee shall calculate monthly and annual TN Loads as follows: L Monthly TN Load (pounds/month) = TN x TMF x 8.34 Where: TN = -average Total Nitrogen concentration (mg/L) of the composite samples collected during the month TMF = Total Monthly Flow of wastewater discharged during the month (MG/mo.) 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 report each year's annual results (pounds/year) in the December report for that year. A. (4.) ANNUAL LIMITS FOR TOTAL NITROGEN [G. S. 143-215.1(b)] (a) Total Nitrogen (TN) limits for NPDES dischargers in the Neuse River basin are as prescribed in the basin's Nutrient Management Strategy rule for wastewater treatment facilities, T15A NCAC 2B .0234. (b) The Permittee's TN discharge is governed by this Permit unless the Permittee is a member and co -permittee of an approved compliance association, in which case its TN discharge is governed by the association's group NPDES permit and the limits therein. (c) TN limits for NPDES dischargers in the Neuse River basin are annual, calendar -year limits. All such limits in effect on January 1 of a given year remain in effect for the entire calendar year. Changes in TN limits become effective on January 1 of the year following permit modification and remain in effect for the full year. Similarly, changes in membership in a compliance association become effective on January 1 of the year following the change and remain in effect for the full year. Page 6 of 11 Permit NCO061638 (d) For any given calendar year, the Permittee shall be in compliance with the annual TN Load limit in this Permit if: (1) the Permittee's annual TN Load is less than or equal to said limit, or (2) the Permittee is a Member of a compliance association and a Co -Permittee to the association's group NPDES permit. (e) The Permittee's effective TN limit (if any) may change due to changes in its TN allocation or membership changes in a compliance association. (1) The Permittee may notify the Division and request a modification of this Permit to incorporate allowable changes in its TN Load limit. 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. (2) If the Permittee intends to join or leave a compliance association, the Division must be notified of the proposed change. (3) Upon receipt of timely and proper notification, the Division will modify the affected permit(s) as necessary to incorporate the allowable changes in TN limits or to reflect the change in membership. a. The Division must receive notification no later than August 31 for changes proposed for the following calendar year. b. Notification shall be sent to: NCDEQ/DWR/NPDES Attn: Neuse River Basin Coordinator 1617 Mail Service Center Raleigh, NC 27699-1617 (fl For the purpose of permit compliance, an association's Co -Permittee Members in a calendar year (and the Permittee's membership status) shall be as defined in its group NPDES permit. The roster and the members' TN allocations will be updated annually and in accordance with state and federal program requirements. (g) 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. (5.) 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. Page 7 of 11 Permit NCO061638 Footnote: (1) Transport Factor = 50% b. Any addition, deletion, or modification of the listed allocation(s) (other than to correct typographical errors) or any change in 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. (6.) 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. 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. (2.1 and Section E. (5.) (a)] 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: Page 8 of 11 ALLOCATION AMOUNT (1) STATUS ALLOCATION SOURCE DATE TYPE Estuary Discharge (pounds/year) (pounds/year) Base Assigned by 12/7/1997; 536 1072 Active Rule 4/1/2003 (T15A NCAC 02B .0234) TOTAL 536 1072 Active Footnote: (1) Transport Factor = 50% b. Any addition, deletion, or modification of the listed allocation(s) (other than to correct typographical errors) or any change in 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. (6.) 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. 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. (2.1 and Section E. (5.) (a)] 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: Page 8 of 11 Permit NCO061638 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 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(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-npdes-electronic-reporting-rule Page 9 of 11 Permit NCO061638 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. 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 122.22]. 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 supers ision 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 10 of 11 Permit NCO061638 5. Records Retention [Supplements Section D. 16.11 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 122.4 1]. Page 11 of 11 FACT SHEET EXPEDITED - PERMIT RENEWAL NCO061638 — Class 2 Basic Information for Expedited Permit Renewals Permit Writer/Date Emily Phillips / NPDES / October 26, 2017 Permit Number - Class NC0040606 — Class 2 Flow 0.046 MGD [320 people] Owner Carolina Water Service, Inc. of NC Facility Name Amherst WWTP Type of Waste 100 % domestic Basin Name/Sub-basin number Neuse River Basin / 03-04-03 Receiving Stream Neuse River [segment 27-43-15-(1)] 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? Yes, Neuse nutrient conditions Does permit have instream monitoring? No Is the stream impaired (on 303(d) list)? Yes. Fair Benthos rating. Any obvious compliance concerns? No Any permit MODS since last permit? No Requests for Renewal Received July 19, 2017 New expiration date April 30, 2022 Changes to current permit? Updated map, added eDMR language, & added regulatory citations Data Review -- Reviewed BIMS data from 2012 through present. One monitoring limit violation enforcement in 2015. One daily maximum violation for BOD which proceeded to an NOV in 2014.