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HomeMy WebLinkAboutNC0023256_Draft Permit-Modification_20171213Water Resources ENVIRONMENTAL QUALITY December 13, 2017 Mr. William Raymond, Wastewater Treatment Superintendent Town of Carolina Beach 1121 N. Lake Park Blvd. Carolina Beach, North Carolina 28428 Dear Mr. Raymond: ROY COOPER Got envoi MICHAEL S REGAN Seo eta v LINDA CULPEPPER Intenm Du ector Subject: NPDES Permit NCO023256 Modification Carolina Beach WWTP New Hanover County Class IV Facility The Division has received and reviewed your request to modify the subject permit. Enclosed with this letter is a copy of the draft permit modification for your facility. Please review this draft carefully to ensure thorough understanding of the conditions and requirements it contains. This modified draft permit includes the following changes from your current permit: ➢ The Division evaluated the dilution as predicted by the Cormix model and established acute and chronic mixing zones based on a dilution of 5 1 for acute toxicants and 5 6 for chronic toxicants ➢ A reasonable potential analysis (RPA) was performed based on recent effluent data for chlorodibromomethane, dichlorobromomethane, lead, zinc, and copper. As a result of the RPA limits for chlorodibromomethane and dichlorobromomethane were eliminated The allowable concentrations based on the updated 2015 Water Quality Criteria are 117 µg/1 for chlorodibromomethane and 151 µg/1 for dichlorobromomethane Data shows no reasonable potential to exceed these concentrations for both parameters. The predicted concentration for chlorodibromomethane is greater than 50% of the allowable concentration therefore quarterly monitoring is included in the permit. Copper showed reasonable potential therefore monthly average and daily maximum limits were implemented. Lead did not show reasonable potential therefore monitoring was eliminated ➢ The whole effluent toxicity test requirement was modified to a Chronic Test at 17.9 % effluent concentration (See Condition A.(3)). Concurrent with this notification the Division is publishing a notice in a newspaper having circulation in the general New Hanover County area, soliciting public comments on this permit draft. Please provide any comments you may have to the DEQ - DWR, NPDES Program 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/abouddivisions/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 questions concerning this draft permit, please call me at (919) 807-6387 or by email at Teresa.rodriguez@ncdenr.gov. Sincerely, Teresa Rodriguez NPDES Complex Permitting Unit cc: NPDES Files EPA Region 4 (e -copy) Wilmington Regional Office / Water Quality Program (e -copy) Operators Certification Program, Maureen Kinney (e -copy) Aquatic Toxicology Branch, Susan Meadows (e -copy) Permit NCO023256 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL -QUALITY DIVISION OF WATER RES /URCES ' C u_l 1 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, the Town of Carolina Beach is hereby authorized to discharge wastewater from a facility located at the Carolina Beach WWTP 404 South Dow Road Carolina Beach New Hanover County to receiving waters designated as the Cape Fear River in the Cape Fear River Basin in accordance with effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II and III hereof. The permit shall become effective. This permit and the authorization to discharge shall expire at midnight on May 31, 2019. Signed this day. Linda Culpepper, Interim Director Division of Water Resources By Authority of the Environmental Management Commission Page 1 of 10 Permit NC0023256 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 Carolina Beach is hereby authorized to: 1. Continue to operate an existing 3.0 MGD wastewater treatment facility located in New Hanover County at 404 South Dow Road, Carolina Beach, discharging via outfall 001 and consisting of the following wastewater treatment components: ■ Mechanical bar screen ■ Manual bar screen ■ Grit removal/separator ■ 1.5 MGD oxidation ditch ■ Dual 0.75 MGD aeration basins (modified package plants) ■ Dual secondary clarifiers ■ Three traveling bridge tertiary filters ■ RAS/WAS pump room ■ 1.25 MG equalization basin with lagoon aerator, bar screen and pump station with dual pumps ■ Gas chlorination ■ Chlorine contact chamber ■ Gas dechlorination ■ Effluent diffuser ■ Aerobic digester ■ Two sludge storage basins 2. Discharge from said treatment works into the Cape Fear River, a Class SC stream in the Cape Fear River Basin, at the location specified on the attached map. Page 2 of 10 Permit NCO023256 A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Beginning on the effective date of this permit and lasting until expiration, the Permittee is authorized to discharge treated wastewater from Outfall 001. Such discharges shall be limited and monitored by the Permittee as specified below: EFFLUENT CHARACTERISTICS [PARSMETER CODES] EFFLUENT LIMITATIONS MONITORING REQUIREMENTS Monthly Average Weekly Average Daily Maximum Measurement Frequency Sample Type Sample Location p Flow [50050] 3 0 MGD Continuous Recording Influent or Effluent BOD, 5 -day, 20°C1 (April 1 - October 31) [C0310] 5 0 mg/L 7 5 mg/L 2/week Composite Influent & Effluent BOD, 5 -day, 20°C1 (November 1 - March 31) [C0310] 10 0 mg/L 15.0 mg/L 2/week Composite Influent & Effluent Total Suspended Solids' [C0530] 30.0 mg/L 45.0 mg/L 2/week Composite Influent & Effluent NI -13 as N (Apel 1- October 31) [C0610] 2.0 mg/L 6 0 mg/L 2/week Composite Effluent NH3 as N (November 1- March 31) [C0610] 4.0 mg/L 12 0 mglL 2/week Composite Effluent Total Residual Chlonne2 [50060] 13 0 Ng/L Daily Grab Effluent Enterococci (geometric mean) [61211] 35/100 ml 276/100 ml 2/week Grab Effluent pH3 [00400] Daily Grab Effluent Dissolved Oxygen4 [00300] Daily Grab Effluent Conductivity [00094] Daily Grab Effluent Temperature [00010] Daily Grab Effluent Total Nitrogen (NO2+NO3+TKN) [C0600] Monthly Composite Effluent Total Phosphorus (mg/1) [C0665] Monthly Composite Effluent Chlorodibromomethane [34306] Quarterly Grab Effluent Total Copper [01042] 21 Ng/L 25 Ng/L Monthly Composite Effluent Chronic Toxiaty5 [TGP3E] Quarterly Composite Effluent Effluent Pollutant Scan [NC01] Footnote 6 Footnote 6 Effluent Notes: 1. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15% of the respective influent value (85% removal). 2. The Division shall consider all effluent total residual chlorine values reported below 50 µg/1 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/1. 3. The pH shall not be less than 6.8 standard units nor greater than 8.5 standard units. 4. The daily effluent dissolved oxygen concentration shall not be less than 5 mg/l. 5. Chronic Toxicity (Mysidopsis Bahia) at 17.9% with testing in February, May, August and November (See Special Condition A. (3)). 6. The permittee shall perform three Effluent Pollutant Scans during the term of this permit. See Special Condition A. (5). There shall be no discharge of floating solids or visible foam in other than trace amounts. Page 3 of 10 Permit NC0023256 A. (2) INSTREAM MONITORING REQUIREMENTS Effluent Characteristics Measurement Frequency Sample Type Sample Location1 Dissolved Oxygen June -September 3/week Grab Upstream, Downstream October -May 1/week Temperature oC June -September 3/week Grab Upstream, Downstream October -May 1/week Conductivity June -September 1/month Grab Upstream, Downstream October -May Monthly Notes: 1. Upstream = sample approximately 75 meters north of the outfall. Downstream = 75 meters south of the outfall As a participant in the Cape Fear River Basin Association, the instream monitoring requirements as stated above are waived. Should your membership in the agreement be terminated, you shall notify the Division immediately and the mstream monitoring requirements specified in your permit shall be reinstated. A.(3) CHRONIC TOXICITY PERMIT LIMIT (QRTRLY) [15A NCAC 0213 .0200 et seq.] The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to Mysidopsis bahia at an effluent concentration of 17.9 %. The permit holder shall perform at a minimum, quarterly monitoring using procedures described below to establish compliance with the permit condition. The tests will be performed during the months of February, May, August and November. 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 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 EPA Method 1007.0, Mysid, Mysidopsis bahia, Survival, Growth, and Fecundity Test, as described in Short -Term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Waters to Marine and Estuarine Organisms, Second Edition, EPA/600-4-91/003, July 1994. 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 TGP3E (P/F) for the pass/fail results and THP3E (FR) for the Chronic Value. Additionally, DWQ Form AT -4 (original) is to be sent to the following address: Attention: North Carolina Division of Water Quality Water 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. Page 4 of 10 Permit NCO023256 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 Form submitted. NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism survival, mimmum 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. A. (4) FREEBOARD MAINTENANCE The permittee shall maintain a minimum of one (1) foot of freeboard in the surge basin and maintain sufficient readings from a staff gauge that is surveyed at the lowest point of elevation. Page 5 of 10 Permit NCO023256 A. (5) EFFLUENT POLLUTANT SCAN The Permittee shall perform a total of three (3) Effluent Pollutant Scans for all parameters listed below. One scan must be performed in each of the following years: 2015, 2016, and 2017. Analytical methods shall be in accordance with 40 CFR Part 136 and shall be sufficiently sensitive to determine whether parameters are present in concentrations greater than applicable standards and criteria. Samples should be collected with one quarterly toxicity test each year, and must represent seasonal variation [i.e. do not sample in the same quarter every year]. Unless otherwise indicated, metals shall be analyzed as "total recoverable " Ammonia (as N) Chlorine (total residual, TRC) Dissolved oxygen Nitrate/Nitnte Kjeldahl nitrogen Oil and grease Phosphorus Total dissolved solids Hardness Antimony Arsenic Beryllium Cadmium Chromium Copper Lead Mercury (EPA Method 163 1) Nickel Selenium Silver Thallium Zinc Cyanide Total phenolic compounds Volatile organic compounds Acrolem Acrylonitrile Benzene Bromoform Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane 2-chloroethylvinyl ether Chloroform Dichlorobromomethane 1, 1 -dichloroethane 1,2-dichloroethane Trans-l,2-dichloroethylene 1, 1 -dichloroethylene 1,2-dichloropropane 1,3-dichloropropylene Ethylbenzene Methyl bromide Methyl chloride Methylene chloride 1,1,2,2 -tetrachloroethane Tetrachloroethylene Toluene 1,1,1 -trichloroethane 1,1,2-tnchloroethane Trichloroethylene Vinyl chloride Acid -extractable compounds. P -chloro -m -cresol 2 -chlorophenol 2,4-dichlorophenol 2,4 -dimethylphenol 4,6-dinitro-o-cresol 2,4-dinitrophenol 2-mtrophenol 4-mtrophenol Pentachlorophenol Phenol 2,4,6-tnchlorophenol Base -neutral compounds. Acenaphthene Acenaphthylene Anthracene Benzidine Benzo(a)anthracene Benzo(a)pyrene 3,4 benzofluoranthene Benzo(ghi)perylene Benzo(k)fluoranthene Bis (2-chloroethoxy) methane Bis (2-chloroethyl) ether Bis (2-chloroisopropyl) ether Bis (2-ethylhexyl) phthalate 4-bromophenyl phenyl ether Butyl benzyl phthalate 2-chloronaphthalene 4-chlorophenyl phenyl ether Chrysene Di -n -butyl phthalate Di-n-octyl phthalate Dibenzo(a,h)anthracene 1,2 -dichlorobenzene 1,3 -dichlorobenzene 1,4 -dichlorobenzene 3,3-dichlorobenzidine Diethyl phthalate Dimethyl phthalate 2,4-dinitrotoluene 2,6-dmitrotoluene 1,2-diphenylhydrazine Fluoranthene Fluorene Hexachlorobenzene Hexachlorobutadiene Hexachlorocyclo-pentadiene Hexachloroethane Indeno(1,2,3-cd)pyrene Isophorone Naphthalene Nitrobenzene N-nitrosodi-n-propylamme N-nitrosodimethylamine N-mtrosodiphenylamine Phenanthrene Pyrene 1,2,4-trichlorobenzene Reporting. Test results shall be reported on DWR Form- A MR-PPAI (or in a form approved by the Director) by December 31" of each designated sampling year The report shall be submitted to the following address: NCDENR/DWR/Central Files, 1617 Mail Service Center, Raleigh, North Carolina 27699-1617. Page 6of10 Permit NCO023256 A. (6) PERMIT RE -OPENER: TMDL IMPLEMENTATION The Division may, upon written notification to the Permittee, re -open this permit in order to incorporate or modify effluent limitations, monitoring and reporting requirements, and other permit conditions when it deems such action is necessary to implement TMDL(s) approved by the USEPA. A. (7) ELECTRONIC REPORTING OF DISCHARGE MONITORING REPORTS 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.) • Section D. (6.) • Section E. (5.) Reporting Records Retention Monitoring Reports 1. Reporting Requirements [Supersedes 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 mternet 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 - Sewer Overflow/Bypass Event Reports; Pretreatment Program Annual Reports, and Page 7of10 Permit NC0023256 • 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.epaovg /compliance/final-national-pollutant-discharge-elimination-system-npdes-electromc- 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 Information on eDMR and the application for a temporary electronic reporting waiver are found on the following web page- http //deq ne.gov/about/divisions/water-resources/edmr 4. Signatory Requirements [Supplements Section B. (11.) (b) and Supersedes Section B. (11.) (d)1 All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part II, Section B. (11.)(a) or by a duly authorized representative of that person as described in Part 11, 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 obtanung an eDMR user account, please visit the following web page: http //deq.nc.gov/about/divisions/water-resources/edmr Page 8of10 +1DRYPP�, ORTON PT ,4iyr -All N 'OLIGHT JLIGHT? ` �l r ` REND r rn C,�> 0 4 d A0 LIGHTS U ANDERSON i LANDING 1' RUINS U U n/ 7 .. 2 Ai C .. j' Outfall 001 ,.1• 20I fVo If 1 �. Location -we 10 0 Permit NCO023256 /4 W1LMI i Town of Carolina Beach WWTP NCO023256 New Hanover County LIGHT o 1 otl o!o LIGH is - UI 0 J f W U'> s . 3 �Z o zIQ 5 r F TIDAL FLAT L_ Z �W rZ Latitude: 34° 01' 42" N Longitude: 770 55'08" W USGS Quad #: K27SW River Basin #: 03-06-17 Receiving Stream: Cape Fear River Stream Class: SC Location -we 10 0 Permit NCO023256 /4 W1LMI i Town of Carolina Beach WWTP NCO023256 New Hanover County Certification. Any person submitting an following certification [40 CFR 122.22]. ACCEPTED: 7 cert, under penalty of law, that this supervision in accordance with a system evaluate the information submitted. Basi those persons directly responsible for go my knowledge and belief, true, accurate, submitting false information, including t, Permit NC0023256 -lectronic DMR using the state's eDMR system shall make the NO OTHER STATEMENTS OF CERTIFICATION WILL BE icument and all attachments were prepared under my direction or signed to assure that qualified personnel properly gather and on my inquiry of the person or persons who manage the system, or ering the information, the information submitted is, to the best of id complete. l am aware that there are significant penalties for 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 9of10