The URL can be used to link to this page

Home My WebLink AboutNC0021504_Draft Permit_20190724 ROY COOPER coo WS*. Governor 1 MICHAEL S. REGAN 1 � �- Secremn 444 LINDA CULPEPPER Director sierlaL NORTH CAROLINA Environmental Quality July 24,2019 Mr.Sam Stewart,Public Superintendent Town of Biscoe P.O.Box 1228 Biscoe,N.C. 27209-1228 Subject: DRAFT NPDES PERMIT NC0021504 Town of Biscoe WWTP Grade II Biological WPCS [15A NCAC 08G.0302] Montgomery County Dear Mr. Stewart: Enclosed with this letter is a copy of the draft permit for your facility. Please review the draft very carefully to ensure thorough understanding of the conditions and requirements it contains. Your permit is among several in the Yadkin-Pee Dee River Basin that the Division has targeted for expedited renewal. This draft contains the following changes from the existing permit: • Based on eDMR data submitted by Town of Biscoe,mercury demonstrated a reasonable potential to exceed applicable water quality standards/criteria.A water quality-based effluent limit(WQBEL)of 12 ng/L(annual average)for mercury was put in place,with a quarterly monitoring frequency. • A compliance schedule for new mercury limits was added(Section A.(4)) • eDMR/parameter codes in effluent tables were updated • HUC was added to the outfall description on page 2 • The outfall map has been updated • Regulatory citations were added as necessary • Section A.(5)was updated to reflect current eDMR requirements Please note that the practical quantitation limit (PQL) for Total Mercury is 1 ng/L (per the Inorganic Chemistry Branch of the Division of Water Resources Water Sciences Section)and monitoring data should be reportable down to these levels.Per North Carolina 15A NCAC 02B Water Quality Standards for Surface Waters,the current limit for class C waters for mercury is 12.0 ng/L(chronic). With this notification, the Division will solicit public comment on this draft permit by publishing a notice in newspapers having circulation in the general Iredell 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 questions concerning the draft, please contact me via email at [emily.delduco@ncdenr.gov] or call 919-707-9125. Sincerely, ' ijechcer___ Emily DelDuco Environmental Specialist NPDES Program 41R) North Carolina Department of Environmental QualityDivision of Water Resources a l 1617 Mail Service Center I Raleigh,North Carolina 27699-1617 919-707-9125 Permit NC002 1504 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, Town of Biscoe is hereby authorized to discharge wastewater from a facility located at the Biscoe WWTP NCSR 1556 west of Biscoe Montgomery County to receiving waters designated as Hickory Branch in subbasin 03-07-15 of the Yadkin-Pee Dee River Basin in accordance with effluent limits, monitoring requirements, and other conditions set forth in Parts I, II, III and IV hereof. This permit shall become effective x This permit and authorization to discharge shall expire at midnight on June 30,2024. Signed this day x DRAFT Linda Culpepper,Director Division of Water Resources By Authority of the Environmental Management Commission 1 of 8 Permit NC002 1504 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. The Town of Biscoe is hereby authorized to: 1. Continue to operate an existing 0.60 MGD wastewater treatment plant consisting of the following treatment units: $. • Influent bar screen • Dual aeration basins • Dual-hopper clarifier with ski tad, • Sludge return line . • Gaseous chlorine disinfection • Chlorine contact tank • Gaseous dechlorination • Sludge holdingtank • Sludge drying beds The facility is located at the Biscoe WWTP on NCSR 1556 west of Biscoe in Montgomery County. 2. Operate at 0.50 MGD until the average flow for any twelve(12)month period exceeds 80%of the permitted flow(0.40 MGD), after which time the facility must monitor in accordance with effluent limits and monitoring requirements specified for 0.60 MGD. 3. Discharge from said treatment works at the location specified on the attached map into Hickory Branch(HUC: 030401040304), currently classified C waters in the Yadkin-Pee Dee River Basin. 2 of 8 Permit NC0021504 PART I A. (1) EFFLUENT LIMITS AND MONITORING REQUIREMENTS (0.5 MGD) [15A NCAC 02B.0400 et seq., 02B.0500 et seq.] Grade II Biological WPCS [15A NCAC 08G.0302] During the period beginning on the effective date of this permit and lasting until the twelve-month average flow exceeds 0.40 MGD or until expiration,the permittee is authorized to discharge treated domestic wastewater from outfall 001. Such discharges shall be limited and monitored'by the permittee as specified below: MONITORING PARAMETER EFFLUENT LIMITS REQUIREMENTS Parameter Description—eDMR Monthly Weekly Daily Unit of Measurement Sample Sample code Average Average Maximum Measure Frequency Type Location2 Flow - 50050 0.5 MGD Continuous Recorder Influent or Effluent BOD,5-Day(20 Deg.C 3 - C0310 29.0 43.5 mg/L Weekly Composite Influent& g ) Effluent Total Suspended Solids 3 - C0530 30.0 45.0 mg/LWeekly Composite osite went& p Effluent Ammonia Nitrogen(as N) - C0610 6.0 18.0 mg/L Weekly Composite Effluent Fecal Coliform - 31616 200 400 #/100 ml Weekly Grab Effluent (geometric mean) Total Residual Chlorine(TRC)4 - 17 µg/L Weekly Grab Effluent 50060 Temperature, °Centigrade - 00010 deg. C Weekly Grab Effluent, U&D Dissolved Oxygen - 00300 Daily average>6.0 mg/L Weekly Grab Effluent Dissolved Oxygen - 00300 mg/L Weekly Grab U&D Total Phosphorus(as P) - C0665 mg/L Quarterly Composite Effluent Total Nitrogen(as N) - C0600 mg/L Quarterly Composite Effluent Chronic Toxicity(Ceriodaphnia)5 - Quarterly Composite Effluent TGP3B Specific Conductance - 00095 µmhos/cm Weekly Grab Effluent, U&D pH-00400 >6.0 and<9.0 standard Weekly Grab Effluent unitTotal Mercury -COMER6 Annual Average<— 12.0 ng/L Quarterly Grab Effluent Footnotes: 1. The permittee shall submit discharge monitoring reports electronically using the Division's eDMR system[see A.(5)]. 2. U:at least 100 feet upstream from the outfall. D:downstream at NCSR 1556 on White Oak Creek. 3. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15% of the respective monthly average influent value(85%removal). 4. 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. 5. Chronic Toxicity(Ceriodaphnia)limit with testing in January,April,July,and October[see A.(3)]. 6. See Compliance Schedule[A(4)] There shall be no discharge of floating solids or visible foam in other than trace amounts. 3 of 8 Permit NC0021504 A. (2) EFFLUENT LIMITS AND MONITORING REQUIREMENTS [0.6 MGD] [15A NCAC 02B.0400 et seq., 02B.0500 et seq.] Grade II Biological WPCS [15A NCAC 08G.0302] During the period beginning when the twelve-month average flow exceeds 0.40 MGD and lasting until expiration,the permittee is authorized to discharge treated domestic wastewater from outfall 001. Such discharges shall be limited and monitored'by the permittee as specified below: MONITORING PARAMETER EFFLUENT LIMITS REQUIREMENTS Parameter Description—eDMR Monthly Weekly Daily Unit of Measurement Sample Sample Code Average Average Maximum Measure Frequency Type Location2 Flow - 50050 0.60 MGD Continuous Recorder Influent or Effluent Influent BOD,5-Day(20 Deg.C)3 - C0310 29.0 43.5 mg/L 3 /Week Composite Total Suspended Solids 3 - C0530 30.0 45.0 mg/L 3/Week Composite Influent& Effluent Ammonia Nitrogen(as N) - C0610 6.0 18.0 mg/L 3/Week Composite Effluent Fecal Coliform - 31616 200 400 #/100 ml 3/Week Grab Effluent (geometric mean) Total Residual Chlorine(TRC)4 17 µg/L 3/Week Grab Effluent 50060 Temperature, °Centigrade - 00010 deg. C 3/Week Grab Effluent, U&D Dissolved Oxygen - 00300 Daily average>6.0 mg/L 3/Week Grab Effluent Dissolved Oxygen - 00300 mg/L 3/Week Grab U&D Total Phosphorus(as P) - C0665 mg/L Quarterly Composite Effluent Total Nitrogen(as N) - C0600 mg/L Quarterly Composite Effluent Chronic Toxicity(Ceriodaphnia)5 - Quarterly Composite Effluent TGP3B Specific Conductance - 00095 µmhos/cm 3/Week Grab Effluent, U&D standard pH-00400 >6.0 and<9.0ts 3/Week Grab Effluent uni Total Mercury -COMER6 Annual Average< 12.0 ng/L Quarterly Grab Effluent Footnotes: 1. The permittee shall submit discharge monitoring reports electronically using the Division's eDMR system[see A.(5)]. 2. U:at least 100 feet upstream from the outfall. D:downstream at NCSR 1556 on White Oak Creek. 3. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15% of the respective monthly average influent value(85%removal). 4. 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. 5. Chronic Toxicity(Ceriodaphnia)limit with testing in January,April,July,and October[see A.(3)]. 6. See Compliance Schedule[A(4.)] There shall be no discharge of floating solids or visible foam in other than trace amounts. 4 of 8 Permit NC0021504 A. (3) CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY) [15A NCAC 02B.0200] The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to Ceriodaphnia dubia at an effluent concentration of 90%. The permit holder shall perform at a minimum,quarterly monitoring using test procedures outlined in the"North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure,"Revised December 2010,or subsequent versions or"North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure"(Revised-December 2010)or subsequent versions. 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 shall be performed at the NPDES permitted fmal 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-December 2010)or subsequent versions. All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge Monitoring Form(MR-1) for the months in which tests were performed, using the parameter code TGP3B for the pass/fail results and THP3B for the Chronic Value. Additionally, DWR Form AT-3 (original) is to be sent to the following address: Attention: NC DENR/DWR/Water Sciences Section Aquatic Toxicology Branch 1621 Mail Service Center Raleigh,NC 27699-1621 Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section no later than 30 days after the end of the reporting period for which the report is made. Test data shall be complete, accurate, include all supporting chemical/physical measurements and all concentration/response data, and be certified by laboratory supervisor and ORC or approved designate signature. Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for disinfection of the waste stream. Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required, the permittee will complete the information located at the top of the aquatic toxicity(AT)test form indicating the facility name,permit number,pipe number,county,and the month/year of the report with the notation of"No Flow"in the comment area of the form. The report shall be submitted to the Water Sciences Section at the address cited above. Should the permittee fail to monitor during a month in which toxicity monitoring is required,monitoring will be required during the following month.Assessment of toxicity compliance is based on the toxicity testing quarter, which is the three month time interval that begins on the first day of the month in which toxicity testing is required by this permit and continues until the final day of the third month. Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Water Resources indicate potential impacts to the receiving stream,this permit may be re-opened and modified to include alternate monitoring requirements or limits. NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism survival,minimum control organism reproduction,and appropriate environmental controls, shall constitute an invalid test and will require immediate follow-up testing to be completed no later than the last day of the month following the month of the initial monitoring. 5 of 8 Permit NC0021504 • A. (4.) SCHEDULE OF COMPLIANCE [G.S. 143-215.1(b)] 1. Within one year from the effective date of the permit the Permittee shall submit to the Division of Water Resources a Corrective Action Plan summarizing the actions or strategy to be taken to achieve compliance with the total mercury limit at outfall 001. Specific dates for completion or implementation of each action shall be included. 2. Within two years from the effective date of the permit submit a report to the Division summarizing actions taken in accordance with the Corrective Action Plan. 3. Within three years from the effective date of the permit submit a report to the Division summarizing actions taken in accordance with the Corrective Action Plan. 4. Within four years from the effective date of the permit submit a report to the Division summarizing actions taken in accordance with the Corrective Action Plan. 5. Achieve compliance with the total mercury limit specified in Section A.(2) and A.(3)within five years of the permit effective date. Upon approval of the Corrective Action Plan by the Division, the report and actions become an enforceable part of this permit. Any modifications to the schedule shall be requested to the Division at least ninety(90)days before the deadline. Modifications to the schedule in excess of four months will be subject to public notice. A. (5) ELECTRONIC REPORTING OF DISCHARGE MONITORING REPORTS [G.S. 143-215.1(B)] Federal regulations require electronic submittal of all discharge monitoring reports(DMRs)and program reports. The fmal 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 ISupersedes Section D.(2.)and Section E.(5.)(a)1 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 intemet. 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 6 of 8 Permit NC0021504 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 com mencement 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(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. a Waiver from Electronic Reporting 3. How to Request p g 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 7 of 8 Permit NC0021504 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. (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://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." 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]. 8 of 8 41 lir . '. . • _ • .W1 1 1 ` • • 4-. . *I" . ►"•;;-• Dave-=f1 L,i•7� t• I . C , y f. • •• reie-ater 5.'0 (.......„.„„) .1 J 1 •ae "� f F.'• �,," • ,% t M • • • 3>--�, •• G7!/t. ? /7 1'- �(( Hickory Branch { •. �' Do- , • • ,m , \„......J.,.... N.,/ ( . •..,..,t... Aar 7 .. c......._ .c3 1 / t _� /� "'\,....___..) \__ —h Outfall 001 t^�• L ew5 �ti \ rt w t' z • • v- LJ V `�_ • - _ _ ' i l ' • ./) •,• J.' Or. ---`/ 4 // y0 r `7 L 1 ti __,‘ 1„,...: ----: __ _ _='-'-'-- . � _� r s 1 i \ \- `_ / _ - "•"" 1� `�� Copyright0.2013 National Geographiic Society,i_cubed Town of Biscoe - Biscoe WWTP N x \ NPDES Permit NC0021504 A . .„.. 1 15,000,000 _ Receiving Stream:Hickory Branch Stream Class:C Stream Segment: 13-25-22-3-1 Sub-Basin#:03-07-15 River Basin:Yadkin-Pee Dee HUC:030401040304 SCALE 35.3458°N, -79.7964°W County:Montgomery 1:16,000