The URL can be used to link to this page

Home My WebLink AboutNC0064378_Draft Permit_20180110Water Resources ENVIRONMENTAL QUALITY ROY COOPER Goreinor MICHAEL S REGAN Seci etary LINDA CULPEPPER lntetun Director January 10, 2018 J. Bryce Mendenhall, Vice President of Operations Carolina Water Service, Inc. of NC P.O Box 240908 Charlotte, North Carolina, 28224-0908 Subject: Draft of NPDES Permit NCO064378 Willowbrook WWTP/ Class WW -2 Wake County Dear Mr. Mendenhall: 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: ➢ The components list has been updated to include a 7,500 gallon Surge Tank, UV Disinfection, and Cloth Media Tertiary filters. ➢ Grit removal, instrumented flow measurement, and post aeration tank were removed from the components list. ➢ Clarification of annual average has been added to the Combined radium -226 & radium -228, Alpha emitters, Beta emitters parameters in the parameter table. ➢ Clarification of weekly average has been added to Uranium parameter in the parameter table. ➢ Monitoring for TN has been changed from 2/month to weekly to correlate with the monitoring frequencies for TKN and NO2-N+NO3-N. ➢ 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. ➢ Stream Index and HUC Codes have been added to stream description and map. ➢ Beddingfield Creek, Stream Index 27-37, is now listed on the draft 303(d) list as exceeding criteria rating fair for Benthos. 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 Anjali B. Orlando at telephone number (919) 807-6393 or anlali.orlando@ncdenr.gov. Sincerely, *&Ai&i 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 Tic gov/about/divisions/water-resources/water-resources-permits/wastewater-branch/npdes-wastewater-permits Anjali Orlando Environmental Specialist/NPDES Unit cc: Raleigh Regional Office NPDES Unit Permit NC0064378 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 Willowbrook Subdivision WWTP 3623 Willow Tree Lane, Clayton Wake County to receiving waters designated as an unnamed tributary to Beddingfield 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, 2023. Signed this day DRAFT Linda Culpepper, Interim Director Division of Water Resources By Authority of the Environmental Management Commission Page 1 of 12 Permit NC0064378 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 0.03 MGD components: • Bar screen • Surge Tank - 7,500 gallon • Diffused aeration basin - 36,000 gallon • Clarifier -11,000 gallon • Cloth media tertiary filters • UV disinfection system • Back up chlorination and dichlorination system • Sludge holding tank - 5,000 gallon wastewater treatment system with the following The facility is located northwest of Clayton (3623 Willow Tree Lane) at the Willowbrook Subdivision WWTP in Wake County. 2. After receiving an Authorization to Construct from the Division of Water Quality, construct and operate additional treatment units for treatment of up to 0.06 MGD of wastewater, and 3. Discharge from said treatment works at the location specified on the attached map into an unnamed tributary to Beddingfield Creek, currently classified C -NSW waters in sub -basin 03-04-02, Stream Index 27-37 [HUC: 030202011103], in the Neuse River Basin. Page 2 of 12 Permit NCO064378 A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (0.03 MGD) [15A NCAC 02B.0400 et seq.,15A NCAC 02B.0500 et seq.] During the period beginning on the effective date of this permit and lasting until expansion above 0.03 MGD or expiration, the Permittee is authorized to discharge from outfall 001. Such discharges shall be limited and monitored' by the Permittee as specified below: EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS Monthly Daily Measurement Sample Sample Parameter Code Average Maximum Frequency Type Location2 Flow 50050 0.03 MGD Continuous Recording Influent or Effluent Total Monthly Flow Monitor & Report Monthly Calculated Influent or Effluent BOD, 5 -day (200C) — Summer* C0310 15.0 mg/L 22.5 mg/L Weekly Grab Effluent BOD, 5 -day (200C) — Winter* C0310 29.0 mg/L 43.5 mg/L Weekly Grab Effluent Total Suspended Solids C0530 30.0 mg/L 45.0 mg/L Weekly Grab Effluent NH3 as N— Summer* C0610 10.0 mg/L 35.0 mg/L Weekly Grab Effluent NH3 as N— Winter* C0610 20.0 mg/L 35.0 mg/L Weekly Grab Effluent Dissolved Oxygen 00300 Daily average > 5.0 mg/L Weekly Grab Effluent Fecal Coliform (geometric mean) 31616 200/100 ml 400/100 ml Weekly Grab Effluent Total Residual Chlonne3 50060 17 pg/L 2/Week Grab Effluent Temperature (°C) 00010 Daily Grab Effluent H 00400 Not < 6.0 nor > 9.0 Weekly Grab Effluent PH Standard Units TKN (mg/L) 00625 Monitor & Report Weekly Comeposit Effluent NO2-N + NO3-N (mg/L) 00630 Monitor & Report Weekly Comeposit Effluent TN (mg/L)4 C0600 Monitor & Report Weekly Comeposit Effluent TN Loads QM600 Monitor & Report (Ib/mo) Monthly Calculated Effluent Y600 Monitor & Report Ib r Annuall Calculated Effluent Total Phosphorus C0665 Monitor & Report 2/Month Grab Effluent Combined radium -226 & radium -2286 5 pCu/I (annual average) Quarterlys Grab Effluent 11503 Alpha emitters (including radium -226, but 15 pCu/1 (annual average) Quarterlys Grab Effluent excluding radon & uran,UM)6 82077 Beta emitters (gross beta activity; excluding potassium -40 & other naturally occurring 50 pCu/L (annual average) Quarterlys Grab Effluent radionuclides)6 03520 Urarnum6 22708 30 pg/L (weekly average) Quarterlys Grab Effluent Chronic Toxicity' TGP38 Quarterly Composite Effluent Dissolved Oxygen 00300 Weekly Grab Upstream & Downstream Temperature (OC) 00010 Weekly Grab Upstream & Downstream *Summer.' April 1 — October 31 *Winter.- November 1 — March 31 Please see Footnotes to this table on the next page. Page 3 of 12 Permit NC0064378 A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (0.03 MGD)... CONTINUED Footnotes: 1. The permittee shall submit discharge monitoring reports electronically using the Divisions eDMR system [see A. (6.)]. 2. Upstream = at least 50 feet upstream from the outfall. Downstream = at least 300 feet below the outfall. 3. 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. 4. For a given wastewater sample, TN = TKN + NO2-N + NO3-N, where TN is Total Nitrogen and TKN is Total Kjeldahl Nitrogen. 5. TN Load is the mass load of Total Nitrogen discharged in a given period of time [see A. (3.)]. 6. Sampling frequency will increase to monthly should any one sample exceed four times the average annual activity level. The permitted should notify the Point Source Branch of the Surface Water Protection Section as well as the Raleigh Regional Office in writing, should this occur. 7. Chronic Toxicity (Ceriodaphnia) Pass/ Fail at 90%; January, April, July & October (see A. (5.)). THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS. Page 4 of 12 Permit NCO064378 A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (0.06 MGD) [15A NCAC 02B.0400 et seq.,15A NCAC 02B.0500 et seq.] During the period beginning upon expansion to 0.06 MGD and lasting until expiration, the Permittee is authorized to discharge from outfall 001. Such discharges shall be limited and monitored' by the Permittee asspecified below: EFFLUENT CHARACTERISTICS Parameter Code LIMITS MONITORING REQUIREMENTS Monthly Average Daily Maximum Measurement Frequency Sample I Type Sample Location2 Flow 50050 0.06 MGD Continuous Recording Influent or Effluent Total Monthly Flow Monitor & Report Monthly Calculated Influent or Effluent BOD, 5 -day (200C) — Summer* C0310 5.0 mg/L 7.5 mg/L Weekly Composite Effluent BOD, 5 -day (200C) — Winter* C0310 10.0 mg/L 15 0 mg/L Weekly Composite Effluent Total Suspended Solids C0530 30.0 mg/L 45.0 mg/L Weekly Composite Effluent NH3 as N— Summer* C0610 2.0 mg/L 10.0 mg/L Weekly Composite Effluent NH3 as N— Winter* C0610 4.0 mg/L 20.0 mg/L Weekly Composite Effluent Dissolved Oxygen 00300 Daily average > 5 0 mg/L Weekly Grab Effluent Fecal Coliform (geometricmean) 31616 200/100 ml 400/100 ml Weekly Grab Effluent Total Residual Chlorme3 50060 17 pg/L 2/Week Grab Effluent Temperature (°C) 00010 Daily Grab Effluent pH 00400 Not<6.0nor >9.0 Standard Units Weekly Grab Effluent TKN (mg/L) 00625 Monitor & Report Weekly Composite Effluent NO2-N + NO3-N (mg/L) 00630 Monitor & Report Weekly Composite Effluent TN (mg/L)4 C0600 Monitor & Report Weekly Composite Effluent TN Loads QM600 Y600 Monitor & Report (lb/mo) Monitor & Report Ib r Monthly Annuall Calculated Calculated Effluent Effluent Total Phosphorus C0665 Monitor & Report 2/Month Composite Effluent Combined radium -226 & radium -2286 11503 5 pCu/I Quarterly5 Grab Effluent Alpha emitters (including radium -226, but excluding radon & uran,UM)6 820771 15 pCu/1 Quarterly5 1 Grab Effluent Beta emitters (gross beta activity; excluding potassium -40 & other naturally occurring radionuclides)6 03520 50 pCu/L Quarterly5 Grab Effluent Uranwm6 22708 30 pg/L Quarterly5 Grab Effluent Chronic Toxicity' TGP3B Quarterly Composite Effluent Dissolved Oxygen 00300 Weekly Grab Upstream & Downstream Temperature (°C) 00010 Weekly Grab Upstream & Downstream *Summer.- April 1— October 31 *Winter.• November 1— March 31 Please see Footnotes to this table on the next page. Page 5 of 12 Permit NCO064378 A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (0.06 MGD)... CONTINUED Footnotes: 1. The permittee shall submit discharge monitoring reports electronically using the Divisions eDMR system [see A. (6.)]. 2. Upstream = at least 50 feet upstream from the outfall. Downstream = at least 300 feet below the outfall. 3. 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. 4. For a given wastewater sample, TN = TKN + NO2-N + NO3-N, where TN is Total Nitrogen and TKN is Total Kjeldahl Nitrogen. 5. TN Load is the mass load of Total Nitrogen discharged in a given period of time [see A. (3.)]. 6. Sampling frequency will increase to monthly should any one sample exceed four times the average annual activity level. The permitted should notify the Point Source Branch of the Surface Water Protection Section as well as the Raleigh Regional Office in writing, should this occur. 7. Chronic Toxicity (Cerfodaphnia) Pass/Fail at 90%; January, April, July & October (see A. (5.)). THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS. Page 6 of 12 Permit NCO064378 A. (3.) CALCULATION OF TOTAL NITROGEN 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 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/Land 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.) 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 supercede any TN limits) established elsewhere in this permit or in the NPDES permit of a compliance association of which the Permittee is a Co -Permittee Member. ALLOCATION TYPE SOURCE DATE ALLOCATION AMOUNT (1) STATUS Estuary (lb/yr) Discharge (Ib/yr) Base Assigned by Rule (T15A NCAC 02B 0234) 12/7/97, 4/1/03 607 1,213 Active TOTAL 607 1,213 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 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. (5.) CHRONIC TOXICITY PERMIT LIMIT (Quarterly) [15A NCAC 02B.0200 et seq.] The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to Ceriodaphma dubia at an effluent concentration of 90.0%. The permit holder shall perform at a minimum, quarterly 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" Page 7 of 12 Permit NC0064378 (Revised -February 1998) or subsequent versions. The tests will be performed during the months of January, April, July & October_ Effluent sampling for this testing shall be performed at the NPDES permitted final effluent discharge below all treatment processes. If the test procedure performed as the first test of any single quarter 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 -February 1998) or subsequent versions. The chronic value for multiple concentration tests will be determined using the geometric mean of the highest concentration having no detectable impairment of reproduction or survival and the lowest concentration that does have a detectable unpairment of reproduction or survival. The definition of "detectable impairment," collection methods, exposure regimes, and further statistical methods are specified in the "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised - February 1998) 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, DWQ Form AT -3 (original) is to be sent to the following address: Attention: NC DENR DWQ / Environmental Sciences Section 1621 Mail Service Center Raleigh, North Carolina 27699-1621 Completed Aquatic Toxicity Test Forms shall be filed with the Environmental 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 Environmental 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. Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Water Quality indicate potential impacts to the receiving stream, this permit may be re -opened and modified to include alternate monitoring requirements or limits. If the Permittee monitors any pollutant more frequently then required by this permit, the results of such monitoring shall be included in the calculation & reporting of the data submitted on the DMR & all AT Forms submitted. 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 8 of 12 Permit NCO064378 A. (6.) ELECTRONIC REPORTING OF 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.) and Section E. (5.) (a)j 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, 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: Page 9 of 12 Permit NCO064378 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 http://www2.epa.gov/compliance/final-national-pollutant- discharge-elimination-system-npdes-electronic-reporting-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. Irtformation on eDMR and the application for a temporary electronic reporting waiver are found on the following web page: ht!p://deq.nc.gov/about/divisic.ns/water-resources/edmr 4. Signatory Requirements (Supplements Section B. (11.) M and Supersedes Section B. (11.) 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 Page 10 of 12 Permit NC0064378 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 laza, 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 azvare 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.)1 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 1 rte_-_ •�^-- ,�1 ' \��Iti �,, Any .... . . ... . 0 ZXN