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Home My WebLink AboutNC0079057_PERMIT ISSUANCE_20031117NPDE!i DOCUMENT SCANNING COVER !;HEE'1' NPDES Permit: NC0079057 Manteo WWTP Document Type: Permit Issuance Was teload Allocation Authorization to Construct (AtC) Permit Modification Speculative Limits Complete File - Historical Instream Assessment (67B) Environmental Assessment (EA) Permit History Document Date: November 17, 2003 This document is printed on reuse paper - ignore any content on the reverse Bide OF W ATF9 Michael F. Easley p �RvA Governor v v ENR Ja William G. Ross, Jr., Secretary North Carolina Department of Environment and Natural Resources Alan W. Klimek, P.E., Director Division of Water Quality November 17, 2003 N1r. John I..uke, Jr. Town of Nlantco P.O. Box 246 Ntantco, North Carolina 27954 Subject: Issuance of NPDES Permit NCO079057 Nlantco VA TP Dare County Dear Nh. Luke: Division personnel have reviewed and approved your application for renewal of the subject perm][. Accordingly, we are forwarding the attached NPDES discharge permit. This permit is issued pursuant to the requirements of North Carolina General Statute 143-215.1 and the Nlemorandum of Agreement between North Carolina and the U.S. FInvironmental Protection Agency dated May 9, 1994 (or as subsequently amended). 2003: This final permit includes the following changes from the draft permit sent to you on September 10, • Monitoring frequencies for most parameters have been changed to 3/VC7eek (rather than Daily) to conform to requirements for Class II t facilities. • lnstrcam monitoring for fecal coliform has been deleted to conform with current policy for facilities treating 100`%, domestic waste. If any parts, measurement frequencies or sampling requirements contained in this permit at unacceptable to you, you have the right to an adjudicatory hearing upon written request within thirty (30) days following receipt of this letter. This request must be in the form of a written petition, conforming to Chapter 15013 of the North Carolina General Statutes, and filed with the Office of Administrative Hearings (6714 NImI Service Center, Raleigh, North Carolina 27699-6714). Unless such demand is made, this decision shall be final and binding. Please note that this permit is not transferable except after notice to the Division. The Division may require modification or revocation and reissuance of the permit. This permit does not affect the legal requirements to obtain other permits which may be required by the Division of Watcr Quality or permits required by the Division of Land Resources, the Coastal Area Nlanagenment Act or any other Federal or Local governmental permit that may be required. If you have any questions concerning this permit, please contact Dawn Jeffries at telephone number (919) 733-5093, extension 595. Sincerely, ORIGINAL SIGNED BY Mark McIntire Alan W. Klimck, P.E. cc: Central Piles Washington Regional Office/ACuter OLmlit\ Section NPDES Unit Aquatic Toxicology Unit 1\11doh n Domim, / EPA N. C. Division of Water Quality/ NPDES Unit Phone: (919) 733-5083 1617 Mail Service Center, Raleigh, NC 27699-1617 fax: (919) 733-0719 Internet h2o.ew.state.nc.us DENR Customer Service Center: 1 800 623-7748 Permit NCO079057 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY PTA RMTT 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, the Town of Manteo is hereby authorized to discharge wastewater from a facility located at the Manteo WWTP U.S. Highway 64/264 Manteo Dare County to receiving waters designated as Shallowbag Bay in the Pasquotank River Basin in accordance with effluent limitations, monitoring requirements, and other conditions set forth in Parts 1, II, 111 and IV hereof. This permit shall become effective January 1. 2004. This permit and authorization to discharge shall expire at midnight on December 31, 2007. Signed this day November 17, 2003. ORIGINAL SIGNED BY Mark McIntire Alan W. Klimek, P.E. Division of Water Quality By Authority of the Environmental Management Commission Permit NC0079057 ' ' SUPPLEMENT TO PERMIT COVER SHEET All previous NPDIS 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, re(luirements, terms, and provisions included herein. The Town of Manteo is hereby authorized to: Continue to operate a 0.6 MGD wastewater treatment plant that includes the following components: ❑ Mechanical bar screen ❑ Grit chamber ❑ Multi -channel mechanical aeration ❑ Two standard clarifier units ❑ Tertiary traveling bridge filters ❑ Chlorine gas disinfection ❑ Dechlorinahon ❑ Post aeration o Sludge holding tank ❑ Sludge digester ❑ Standby power This facility is located at the Manteo WWTP, off US Highway 64/264 south of Manteo in Dare County. 2. After receiving an Authorization to Construct (ATC) from the Division, expand the facility to achieve up to 1.0 MGD treatment capacity. 3. Discharge from said treatment works at the location specified on the attached map into Shallowbag Bay, classified SC waters in the Pasquotank River Basin. Y8 03W012 JA✓KAP ) 5iillil;,i"I Alsm 2 2 3 4 Sandy Point S hl& Baum Point 7 1 o w b a g . B� a y 6 0 K W Ef I\), LAT. 35, Ballast Point 0 Light s 2 a t0 i ell el L -lurne�z Ga 15 Quad: Manteo, N.C. NC0079057 FaciLity Subbasin: 30151 Location Latitucle: 35'54'24" Town of Manteo WWTP Longitude: 75"39'28" Receiving Stream: Shillowbag l3m Stream Class: SC North SCALE IMA#000 Permit NCO079057 A. (1.) EFFLUENT LIMITATIONS AND MONITORING R.EQUIRENIENTS (0.6 MGD) During the period beginning on the effective datc of this permit and lasting until expansion above 0.6 t\-IGD or espirarion, the Pcrmittcc is aud3rnizcd to discharge from outfall 001. Such discharges shall be limited and monitored by the Pcrmittcc as specified below: EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS Monthly Average Weekly Average Daily Maximum Measurement Frequency Sample Type Sample Location Flow 0.6 MGD Continuous Recording Influent or Effluent BOD5, 20T (April 1- October 31 2 5.0 m /L 7.5 m /L 3/Week Composite Effluent, Influent BODs,20°C November 1-March 31 2 10.0 m /L 15.0 m /L 3/Week Composite Effluent, Influent Total Suspended Solids2 30.0 m /L 45.0 m L 3/Week Composite Effluent, Influent NH3 as N (April 1 - October 31 2.0 m /L 6.0 m IL 3/Week Composite Effluent NH3 as N November 1-March 31 4.0 m /L 12.0 m /L 3/Week Composite Effluent Dissolved Oxygen3 3/Week Grab Effluent Fecal Coliform (geometric mean 14l 100 ml 28 / 100 ml 3/Week Grab Effluent Total Residual Chlorine 17 /L 3/Week Grab Effluent H 6.8-8.5standard units 3/Week Grab Effluent Temperature 2C) Daily Grab Effluent Total Nitrogen (NO2+ NO3+ TKN)Quarterly Composite Effluent Total Phosphorus Quarterly Composite Effluent Total Zinc Quarterly Composite Effluent Acute Toxicity' Quarterly Composite Effluent Total K'eldahl Nitrogen TKN Weekly Composite Effluent Temperature °C See Footnote 1 Dissolved Oxygen Salinity H Notes: l . All instream monitoring samples shall be instantaneous samples. These shall be collected three times per week during June, JUly, August, and September, and once per week during the rest of the year. They shall be collected as grab samples at one -foot intervals vertically throughout the water column. Instream sampling locations are as follows: 1) at the mouth of Douglas Creek. 2) near the mouth of Scarboro Creek. 3) in Shallowbag Bay approximately 800 feet northeast of Sandy Point, 4) in Shallowbag Bay approximately 0.4 miles southeast of Ballast Point, and 5) in Roanoke sound approximately 200 feet outside of Shallowbag Bay. 2. The monthly average BOD5 and Total SUspencled Solids (TSS) concentrations shall not exceed 15% of the respective influent value (85% removal). 3. The daily average dissolved oxygen concentration shall not be less than 6. 0 mg/1- 4. Whole Effluent Toxicity shall be measured by the Acute Toxicity (P/F) test using fathead rrtinrtow at 90%. Testing shall be conducted in February. May, August and November (see condition A. (3)). There shall be no discharge of floating solids or visible foam in other than trace amounts. Permit NC0079057 A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (1.0 MGD) During the period beginning after expansion above 0.6 rA1GD and lasting until cspiration, the PCIIT11ctCC is authorizeci to clischaigc from outfall 001. Such discharges shall be limited and monitored by the PCCnlittee as specified below: EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS Monthly Average Weekly Average Daily Maximum Measurement Fre uenc Sample Type Sample Location Flow 1.0 MGD Continuous Recording Influent or Effluent BOD5, 202C (April 1- October 31 2 5.0 m /L 7.5 m /L 3/Week Composite Effluent, Influent BOD5,202C (November 1-March 31)2 10.0 m /L 15.0 m /L 3NVeek Composite Effluent, Influent Total Suspended Solids2 30.0 m /L 45.0 m /L 3Meek Composite Effluent, Influent NH3 as N (April 1 - October 31 2.0 m /L 6.0 m /L 3Meek Composite Effluent NH3 as N November 1-March 31 4.0 m /L 12.0 m /L 3/Week Composite Effluent Dissolved Oxygen3 3/Week Grab Effluent Fecal Cotiform (geometric mean 14l 100 ml 28 / 100 ml 3/Week Grab Effluent Total Residual Chlorine 17 t /L 3Meek Grab Effluent H 6.8 - 8.5 standard units 3Meek Grab Effluent Temperature TC Daily Grab Effluent Total Nitrogen 1,102+NO3+TKN Quarterly Composite Effluent Total Phosphorus Quarterly Composite Effluent Total Zinc Quarterly Composite Effluent Acute Toxicit 4 Quarterly Composite Effluent Total K'eldahl Nitrogen TKN Weekly Composite Effluent TemperatureIT) See Footnote 1 Dissolved Oxygen Salinity H Notes: 1. All instream monitoring samples shall be instantaneous samples. These shall be collected three times per week during June, July, August, and September, and once per week during the rest. of the year. They shall be collected as grab samples at one foot intervals vertically throughout Lhe water column. Inslream sampling locations are as follows: 1) at the mouth of Douglas Creek, 2) near the mouth of Scarboro Creek, 3) in Shallowbag Bay approximately 800 feet northeast of Sandy Point, 4) in Shallowbag Bay approximately 0.4 miles southeast of Ballast Point-, and 5) in Roanoke sound approximately 200 feel outside of Shallowbag Bay 2. The monthly average BODS and 'total Suspended Solids (TSS) concentrations shall not exceed 15% of the respective influent value (85% removal). 3. The daily average dissolved oxygen concentration shall not be less than 6. 0 mg/L. 4. Whole Gffluenl Toxicity shall be measured by the Acute Toxicity (P/1') test using fathead minnow at 90%. Testing shall be conducted in February, May, August and November (see condition A. (3)). There shall be no discharge of floating solids or visible foam in other than trace amounts. Permit NCO079057 A. (3.) ACUTE TOXICITY PERMIT LIMIT (Quarterly) 'I'hc Pcrnhittcc shall conduct acute toxicity tests on a nab basis using protocols defined in the Not Carolina Procedure Document entitled "Pass/bail iMcthodology For Determining Acute Toxicity In A Single Ffflucnt Concentration" (Revised -July, 1992 or subsequent versions). The monitoring shall be performed as a Fathead Minnow (Piniephalet pronue&u) 24-hour static test. The effluent concentration at which there may be at no time significant acute mortality is 90% (defined as treatment two in the procedure document). Effluent samples for self - monitoring purposes must be obtained during representative effluent dischatgge below all waste treatment. The tests will be performed during the months otFebruary, May, August and November. All tosicitV testing results required as part of this permit condition will be entered on the Effluent Discharge Monitoring Form (MR-1) for the month in which it was performed, using the parameter code TGH6C. Additionally, DVCFQ Form AT-2 (original) is to be sent to the following address: Attention: NC DENR / DWQ / Environmental Sciences Branch 1621 Mail Service Center Raleigh, North Carolina 27699-1621 Completed Aquatic Toxicity Tcst Forms shall be filed with the Gnviromncriml Sciences Branch no later than 30 days after the end of the reporting period for which the report is made. Test data shall be complete and accurate and include all supporting chemical/physical measurements performed in association with the toxicity tests, as well as all dose/response clata. Total residual chlorine of the effluent toxicio, 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 (A'f) test form indicating the facilit} name, permit number, pipe number, countq., and the month/year of the report with the notation of "No Flow" in the comment area of the form. T'hc report shall be submitted to the I nvironnhcntal Sciences Branch at the address cited above. Should am' single quarterly monitoring indicate a failure to meet specified limits, then monthly monitoring will begin immediately until such time that a single test is passed. Upon passing, this monthly test requirement will revert to quarterly in the months specified above. Should the Permittee fail to monitor during a month in which toxicity monitoring is required, then monthly monitoring will begin immediately until such time that a single test is passed. Upon passing, this monthly test requirement will revert to quarterly in the months specified above. Should any test clatu from cidicr these monitoring requirements or tests performed by the North Carolina Division of \Chafer Quality indicate potential impacts to the receiving stream, this permit may be re -opened and modified to include alternate monitoring requirements or limits. NG"I'G: Failure to achieve test conditions as specified in the cited document, such as minimum control organism survival and appropriate environmental controls, shall constitute an invalid test and will require immediate follow-up testing to be completed no later than the last clay of the month following the month of the initial monitoring. Permil- NCO079057 A. (4) UFFLU IsNT POLLUTANT SCAN The Pci inittec shall perform an annual Gfflucnt Pollutant Scan for all parameters listed in the attached table. The Permiuce shall perform an annual EYALICnt Pollutant Scan for all parameters listed in the attached cable. The analytical methods shall be in accordance with 40 CFR Part 136 and shall be snfficiently sensitive to determine whether parameters are present in concentrations greater than applicable standards and criteria. Samples shall represent seasonal variations. Unless otherwise indicated, metals shall be analyzecl as "total recoverable." Ammonia (as N) Trans-1,2-dichloroelhylene Bis(2-chloroethyl) ether Chlorine (total residual, TRC) 1,1-dichloroethylene Bis (2-chloroisopropyl) ether Dissolved oxygen 1,2-dichloropropane Bis (2-ethylhexyt) phthalate Nitrate/Nitrite 1,3-dichloropropylene 4-bromophenyl phenyl ether Kjeldahl nitrogen Ethylbenzene Butyl benzyl phthalate Oil and grease Methyl bromide 2-chloronaphlhalene Phosphorus Methyl chloride 4-chlorophenyl phenyl ether Total dissolved solids Methylene chloride Chrysene Hardness 1,1,2,2-tetrachloroethane Di-n-butyl phthalate Antimony Tetrachloroethylene Di-n-octyl phthalate Arsenic Toluene Dibenzo(a,h)anthracene Beryllium 1,1,1-trichloroethane 1,2-dichlorobenzene Cadmium 1,1,2-trichloroethane 1,3-dichlorobenzene Chromium Trichloroethylene 1,4-dichlorobenzene Copper Vinyl chloride 3,3-dichlorobenzidine Lead Acid -extractable compounds: Diethyl phthalate Mercury P-chloro-m-creso Dimethyl phthalate Nickel 2-chlorophenol 2,4-dinitrotoluene Selenium 2,4-dichlorophenol 2,6-dinitrotoluene Silver 2,4-dimethylphenol 1,2-diphenylhydrazine Thallium 4,6-dinitro-o-cresol Fluoranthene Zinc 2,4-dinitrophenol Fluorene Cyanide 2-nitrophenol Hexachlorobenzene Total phenolic compounds 4-nitrophenol Hexachlorobutadiene Volatile organic compounds: Pentachlorophenol Hexachlorocyclo-pentadiene Acrolein Phenol Hexachloroethane Acrylonitrile 2,4,6drichlorophenol Indeno(1,2,3-cd)pyrene Benzene Base -neutral compounds: Isophomme Bromoform Acenaphthene Naphthalene Carbon tetrachloride Acenaphthylene Nitrobenzene Chlorobenzene Anthracene N-nitrosodi-n-propylamine Chlorodibromomethane Benzidlne N-nitrosodimethylamine Chloroethane Benzo(a)anthracene N-nitrosodiphenylamine 2-chloroethylvinyl ether Benzo(a)pyrene Phenanthrene Chloroform 3A benzofluoranthene Pyrene Dichlorobromomethane Benzo(ghi)perylene 1,2,4-tichlorobenzene 1,1-dichloroethane Benzo(k)fluoranthene 1,2-dichloroethane Bis(2-chloroethoxy) methane Tcst results shall be reported ro the Division in DWQ form- A tMR-PI'M or in a form approved by the Director within 90 clays of sampling. The report shall be submitted to the following address: Division of Water QualitNI, Water Quality Section, Central files, 1617 Mail Scrvice Center, Raleigh, North Carolina 27699-1617. NOV 1 3 2003 NORTH CAROLINA DARE COUNTY. AFFIDAVIT OF PUBLICATION Before the undersigned, a Notary Public of said County and State, duly commissioned, qualified, and authorized by law to administer oaths, personally appeared S........ .... _$.1 m p.S.on.,...t.re a s.u.re I'..... ................................... I .......... I who being first duly sworn, deposes and says: that he (she) is of The Times Printing Co., Inc., engaged in the publication of a newspaper known as THE COASTLAND TIMES, pub- lished, issued, and entered as second class mail in the Town of Manteo, in said County and State; that he is authorized to make this affidavit and sworn statement; that the notice or other legal advertisement, a true copy of which is attached hereto, was published in THE COASTLAND TIMES on the following dates: September 14, 2003 ................................ ........................................................ . and that the said newspaper in which said notice, paper, document, or legal advertisement was published was, at the time of each and every such publication, a newspaper meeting all of the requirements and qualifications of Sec- tions 1-596 and 1-597 of the General Statutes of North Caro- lina and was a qualified newspaper within the meaning of Section 1-597 of the General Statutes of North Carolina. 22ndr d of October 200 This .2... ........., ....... .. ///))) .... .... ... Sworn to a d subscribed to bpfO a me, th' 2 n day of .. 0 t b e r ........................ 2003 Notary Publu My Commission expires: August 12, 2005 DENR/DNVQ FACI'SHFsET FOR NPDES FERMI"1' DI?VELOPMEN'I' NPDES Permit NCO079057 Facility Information Applicant/Facility Name: Town of Manteo/ Manteo W WTP Applicant Address: P.O. Box 246; Manteo. North Carolina 27954 Facility Address: Off U.S. Highway 64-264, Manteo, North Carolina 27954 Permitted Flow 0.6 MGD/LO MGD (phased permit) Type of Waste: 100 %n domestic Facility/Permit Status: Class IV /Active; Renewal County: I Dare Count Miscellaneous Receiving Stream: Shallowba° Bay Regional Office: Washington (WaRO) Stream Classification: SC State Grid / USGS Quad: D36NW 303(d) Listed? No Permit Writer: Natalie V. Sierra Subbasin: 03-01-51 Date: August 20,2003 Drainage Area (mi'): N/A 7Q10 (cfs) Tidal 30Q2 (cfs) Tidal Average Flow (cfs): Tidal Lat. 350 54' 24" N Long. 750 39' 28" W BACKGROUND The Manteo WWTP (Class IV) has a phased permit for 0.6 MGD and LO MGD. The permit was originally issued on January 11 and expired on February?8, 2003. The Permittee submitted EPA Form 2A on September 4, 2002 in order to request renewal of the permit. The Permittee has not requested any changes to the existing permit. Instream Monitoring, Verification of Existing Conditions and DMR Data Review ]'his facility discharges to Shallowbag Bay in subbasin 03-15-01 of the Pasquotank River Basin. The Bay is classified SC waters at the discharge point and is not on the 2002-303(d) list. Although the facility is required by the NPDES permit to collect instream data, none were available in Central Files. A request for these data will be made in the cover letter. DMR data from January 2001 through May 2003 were reviewed. Data for conventional parameters are summarized in Table 1. Flow.. Temperature., Dissolved BOD , . TSS (mg/L). Fecal (On Oxygen (tng/L) .. (#/100 mL) (mg/L) 'fable I. NCII1126671 Conventional Data (January 2001-Nlay 2003) While not necessarily evident in these data. the facility has also experienced problems meeting the weekly average fecal coliform limit. This will be discussed further in the Correspondence section. This facility also collects data for total nitrogen, total phosphorus, and ammonia nitrogen (NH3-N). These are summarized in 'fable 2. Total nitrogen and phosphorus data appear typical of this type of facility. shact NPDL> W0079157 Rcncs:d Pagc 1 "table 2. N00026671 NWrienl Pain (January 2001 — May 2003) Finally. total residual chlorine (TRC) is also monitored through the permit. Most samples were below detection level, with an average TRC from January 2001-June 2003 of 0.1 ftg/L. Correspondence The Washington Regional Office (WaRO) conducted several site visits during this permit term to evaluate compliance. For the most part, the facility was found to be in compliance and has made considerable improvements since the previous permit term. The Manteo WWTP has received six Notices of Violation (NOVs) over the course of this permit term. Four of these were issued for violations of monthly and weekly average fecal colifonn limits and all were severe enough to warrant civil penalties. It should be noted that because this discharge is to SC waters, the fecal coliform limits are more stringent than those in many other municipal permits. The other two NOVs were issued for a late toxicity report and a violation of the BOD5 weekly average. The facility has otherwise been in compliance with its toxicity limit. PERMITTING STRATEGY Waste Load Allocation (WLA) The Division prepared the last WLA for the previous permit renewal. The previous and current effluent limits were based on guidelines and water quality standards. The Division has judged previous parameters and limits to be appropriate for renewal with some exceptions. Weekly average ammonia limits based on a 3:1 ratio with the monthly average will be implemented in this permit. This is a new statewide policy that resulted from EPA requirements. The resulting summer weekly average limit will be 6.0 mg/L and the winter limit will be 12.0 mg/L. In addition, an annual pollutant scan will be added such that the Permittee can collect the necessary data required by EPA Form 2A throughout the permit term. This condition is now standard on all major municipal permits in North Carolina. Finally, zinc was detected in the priority pollutant analysis submitted with the renewal application. The level at which it was detected exceeds the NC water quality criterion for zinc. Quarterly zinc monitoring will be added accordingly. SUMMARY OF PROPOSED CHANGES In keeping with Division policies, the following will be incorporated into the permit: • New weekly average ammonia limits (both summer and winter) • Annual pollutant scan • Quarterly zinc monitoring PROPOSED SCHEDULE FOR PERMff ISSUANCE Draft Permit to Public Notice: September 10.2003 Permit Scheduled to Issue: November 5, 2003 Attachnient(s): DMR data suns iaty NPDES DIVISION CONTACT If you have questions regarding any of the above information or on the attached permit. please contact Natalie Sierra at (9 9) 733-5053 ext. 551. NANIE: DATEI: SPP 0. F'tcl. Shcel NPDP:S NC007,0057 Rrne\Nal Page Town of Manteo - Manteo WWTP NC0079057 K Date Flow (MGD) Temp. (deg C) D.O. (mglL) BOD (mg/�) TSS (mpg/L) F,eeal (#/100 mL) NH3-N (m„gfL) TN (mg/L) oa Mgsid a Cfilonne TP(mg/L), 3 (ug%L)_ Jan-01 0.1904 12.42 10.30 1.02 1.00 32.70 0.02 12.44 2.11 0.0 Feb-01 0.1797 14.55 9.81 2.70 0.60 62.40 2.13 0.0 Mar-01 0.1933 14.86 9.09 0.25 0.30 5.30 0.05 0.6 Apr-01 0.2015 17.70 9.48 0.00 0.40 3.60 0.46 12.16 0.98 0.5 May-01 0.1738 20.81 8.48 0.20 1.70 3.60 0.00 0.0 Jun-01 0.2409 24.52 7.96 0.31 0.40 3.00 0.00 0.0 Jul-01 0.2355 25.66 7.88 4.29 0.00 3.30 0.09 2.91 2.57 0.0 Aug-01 0.2249 25.71 7.96 1.16 0.30 3.30 0.15 0.0 Sep-01 0.1885 24.10 8.18 1.21 1.50 8.10 0.04 0.0 Oct-01 0.1335 20.34 8.94 2.53 1.30 5.00 0.00 15.57 5.74 0.0 Nov-01 0.1126 18.53 9.30 1.03 0.86 1.27 0.00 0.6 Dec-01 0.1773 16.79 9.79 3.29 1.87 1.60 0.01 0.0 Jan-02 0.1317 13.86 10.62 1.91 1.25 5.46 0.86 11.91 1.44 0.0 Feb-02 0.1419 14.40 10.59 0.24 0.75 1.48 0.00 0.0 Mar-02 0.2594 16.71 10.27 0.10 0.52 1.98 0.00 0.0 Apr-02 0.2246 20.33 8.90 0.60 0.53 1.10 0.17 4.01 0.00 0.0 May-02 0.1760 22.27 8.62 2.12 0.00 1.42 0.00 0.0 Jun-02 0.1928 25.94 8.36 2.80 0.55 4.39 0.00 0.0 Jul-02 0.2461 26.91 7.91 1.17 1.59 4.77 0.13 0.0 Aug-02 0.2678 26.67 8.02 1.54 2.08 5.17 0.11 5.48 3.66 0.0 Sep-02 0.3731 25.30 7.60 3.66 5.40 15.53 0.51 0.0 Oct-02 0.2761 22.87 7.85 2.02 1.32 4.44 0.05 7.65 2.06 0.5 Nov-02 0.2570 19.44 7.74 0.40 0.24 3.92 0.00 0.0 Dec-02 0.2300 15.10 7.92 0.65 0.00 1.42 0.00 0.0 Jan-03 0.2098 13.89 8.38 0.11 0.30 1.73 0.00 5.60 0.72 0.0 Feb-03 0.2802 13.85 8.27 0.33 0.69 1.69 0.00 0.0 Mar-03 0.2908 16.19 8.18 0.62 1.52 2.31 0.00 0.8 Apr-03 0.3420 18.05 8.25 0.83 0.60 2.56 0.00 4.18 0.97 0.0 May-03 0.3088 21.52 8.04 0.41 0.39 1.66 0.00 0.5 average W2228 19l63 V71 1a29 0'96 6' !. l OK6 8519 2103 Ot4j2. Maximum 0.3731 26.91 1A.62 4.29 5.1,0 62., 2.13 15.57 5.74 0.81 ;Minimum 0.1t126 12.42 7.6 0 0 1.1 P_:CEi 'E V UTY c To: Permits and Engineering Water Quality Section Attn: Tom Belnick Date: January 3, 2003 NPDES STAFF REPORT AND Dare County Permit No. NCO079057 PARTI- GENERALINFORMATION 1. Facility and Address: Town of Manteo PO Box 246 Manteo, NC 27954 2. Date of Investigation: October 31, 2002 3. Report Prepared By: Ed Warren JAN 10 2003 NON -DISCHARGE PERM11TTING DATION 4. Person(s) Contacted and Telephone Number(s): Butch Luke, Jr., Utilities Superintendent (252) 473-3513 5. Directions to Site: From Highway 64 Business in Manteo, turn right onto Bowsertown Road. Proceed approximately 0.5 mile to the facility located on the left side of the road at 710 Bowsertown Road. 6. Discharge Point(s): Latitude: 350 54' 24" Longitude: 750 39' 28" Attach USGS map extract and indicate treatment facility site and discharge point on map. USGS Quad No. USGS Quad Name: Manteo 7. Site size and expansion area consistent with application? Yes ✓ No_ If "No", explain: 8. Topography (relationship to flood plain included): Site is approximately 5 feet above MSL and relatively flat. 9. Location of nearest dwelling: The wastewater treatment plant is approximately 300 yards from any dwelling. 10. Receiving stream or affected surface waters: Shallowbag Bay a. Classification: SC b. River Basin and Subbasin No.: 03-01-51 c. Describe receiving stream features and pertinent downstream uses: Fishing and boating are main uses. Shallowbag Bay borders the Roanoke Sound which is classified SA HQW. PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS 1. a. Volume of Wastewater to be Permitted: 0.6 MGD (Ultimate Design Capacity) b. Current Permitted Capacity: 0.6 MGD c. Actual Treatment Capacity: 0.6 MGD (Current Design Capacity) d. Date(s) and construction allowed by Authorizations to Construct issued in past two years: e. Description of existing or substantially constructed wastewater treatment facilities: Facility is an activated sludge process consisting of mechanical bar screen, grit chamber, multi -channel oxidation ditch, dual secondary clarifiers, traveling bridge tertiary filters, chlorine gas disinfection, dechlorination, post aeration, aerobic sludge digester and aerated sludge holding basin. f. Description of proposed wastewater treatment facilities: None g. Possible toxic impacts to surface waters: None known 2. Residuals Handling and Utilization/Disposal Scheme: Aerobically digested sludge is land applied by Atlantic Nutrients under their permit. 3. Treatment Plant Classification (attach completed rating sheet): Class 3 4. SIC Code(s): 4952 Wastewater Code(s): Primary 01 Main Treatment Unit Code: 1013 PART III - OTHER PERTINENT INFORMATION Is this facility being constructed with Construction Grant Funds, or are any public monies involved (municipals only)? NA 2. Special monitoring or limitations (including toxicity) requests: None 3. Important SOC, 30C, or Compliance Schedule dates: None PART IV - EVALUATION AND RECOMMENDATION The Regional Office recommends that the permit be renewed. Signature of Report reps arer A,Water Quality Regional Supervisor I9 /,,3 Date August 27, 2002 Mrs. Valery Stephens NC DENR / Water Quality / Point Source Branch 1617 Mail Service Center Raleigh, NC 27699-1617 The Town of Manteo is requesting the renewal of permit number NC0079057. There have been no changes at the facility since the issuance of the last permit. Sincerely, John Luke Utilities Superintendent 407 Budleigh Street • A0. Box 246 • Manteo, North Carolina 27954 • 252-473-2133 Website: townofmanteo.com e-mail: info@townofmanteo.com CODE: MANTE W/0/: 02118 F/B/: N/A PLOT DATE AUG. 6. 2002 PLOr SCALE: 1-1 DRAWN SY: JE CAD FILE: 02118PP1 X(ref)s: N/A A y -A 6� �\�� MotEer Vineyard a EGIONAL Al PORT 1 �\y\\ Baum Point rl Liphf o i (am 51 - 10 Ballast 0 Point 1 ...•. g 'SarldyPdM C°l ( ` ` �� • , .�.:' `;.\ Shallombap Bay s•' `uiwt POINT OF 6� s DISCHARGE % k ( a Lat 35*54*240 1 Havalp�"T� i _ m iir\\ Caltierdts VIA�i\�� Long 75'39'28' i Me -f o _ k site taro wwTP Basin - SITE T. R. O A: N O ,.K E I S L A N D t 7 • --- 10 u, s O 9 � 1 5 'Q]-:}`a'F� '�'r- 1. Influent Pump Station e 2. Aeration Basin 3. Secondary Clarified +� 4. Tertiary Filters 3 - 0 5. Post Aeration "c 6. Digester • 7. Aerated Sludge Holding to 8. Maintenance Building -: 9. Operations Building 10. Parking GREEN ENGINEERING WATER, WASTEWATER, 9URVEYNCE PLANNING PROJECT MANAC>EAIENT 303 N. OCLDSBONO ST. P.O. BOX 609 WLSON. N.C. 27893 TOWN OF MANTEO WWTP TEL (252) 237-5365 FAX (252) 243-7489 ofllceeareenerX;com DARE COUNfY NORTH CAROLNA MECHANICAL ELEV. 15.33 BAR SCREENS ELEV. 15.92 20 100 YEAR FLOOD 9. 00 M. S. L. INFLUENT PUMP ELEV. 13.50 15FlELEV. 12.23 - DIVERSION BOX 10 = ELEV. 10.98 LLJ T7 0 AERATION BASIN DISTRIBUTION BOX -5 GRIT CHAMBER -10 HEADWORKS CLARIFIER 15 CL /POST AERATION BASIN EFFLUENT FILTER 10 ELEV. 4.83 5 LiEFFLUENT PUMP 0 -5 -10 FIGURE 1-2 HYDRAULIC PROFILE