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Home My WebLink AboutNC0021873_Permit (Issuance)_20130712NPDES DOCUMENT SCANNING: COVER !SHEET NPDES Permit: NC0021873 Mayodan WWTP Document Type: , Permit Issuance Wasteload Allocation Authorization to Construct (AtC) Permit Modification Complete File - Historical Engineering Alternatives (EAA) Correspondence Owner Name Change Instream Assessment (67b) Speculative Limits Environmental Assessment (EA) Document Date: July 12, 2013 This document is pri'ited on reuse paper - igrzore any content on the re -I erse side bENR North Carolina Department of Environment and Natural Resources Division of Water Quality Pat McCrory Thomas A. Reeder John E. Skvarla, III Govemor Acting Director Secretary July 12, 2013 Michael M. Brandt Town Manager Town of Mayodan 210 W. Main Street Mayodan, North Carolina 27027 Subject: Issuance of NPDES Permit Renewal NC0021873 Town of Mayodan WWTP Rockingham County Dear Mr. Brandt: The Division of Water Quality (Division) personnel have reviewed and approved your application for renewal of the subject permit. Accordingly, we are forwarding the attached NPDES discharge permit. It is issued pursuant to the requirements of North Carolina General Statute 143-215.1 and the Memorandum of Agreement between North Carolina and the U.S. Environmental Protection Agency dated October 15, 2007, or as subsequently amended. There are changes to this permit from the draft permit dated January 16, 2013: (1) At the request of Ms. Nadine Blackwell of United Water, effluent data supplied has been reviewed against the requirements for reducing sampling frequency for Exceptionally Performing Facilities. BOD, TSS and Ammonia - N all met the requirements, so monitoring frequencies for these three parameters has been reduced to 2/ Week for all flow regimes on Effluent Limitations and Monitoring Requirements Sheets A.(1), A,(2), and A.(3). Fecal Coliform did not meet the requirements, so monitoring frequency will remain the same as in your current permit. (2) Special Condition A.(7.) has been revised and updated per the Division's Mercury Permitting Strategy. 1617 Mail Service Center, Raleigh, North Carolina 27699-1617 Location: 512 N. Salisbury St. Raleigh, North Carolina 27604 Phone: 919-807-63001 FAX: 919-807-6492 Internet w►ww.ncwateroualitv.orq None Carolina XaturaIIji An Equal opportunity 1 Affirmative Action Employer i The following changes have been made from the current permit: • Add TRC footnote per permitting strategy. • Revise annual effluent parameter scan to 3 scans per permit cycle during specified years in accordance with revised EPA requirements. • Adjust ammonia limits to not higher than 35 mg/ L. • All monitoring requirements of the LTMP remain in place. • A Total Mercury limit of 47 Ng/ L annual limit with Quarterly monitoring has been added to all 3 EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS pages, based on a statistical review of your mercury discharge data from the DMR data, in keeping with the Statewide Mercury TMDL and our TMDL implementation strategy; the old weekly average mercury limit of 0.14 µg/ L on the 4.5 MGD sheet was removed. • A Mercury Minimization Plan (MMP) has been added as Condition A.(7.) in accordance with the recent mercury TMDL implementation strategy. The Mercury Minimization Plan must be developed by January 28, 2014 and maintained at your facility. • Sheet A.(1) - 2.5 MGD: Based on Reasonable Potential (to exceed Water Quality Standards) Assessment (RPA) and our permitting strategy for metals, removed monitoring for Total Lead, Total Selenium and Total Zinc, removed limits for Total Lead (Daily Max.) and Total Selenium (Weekly Average and Daily Max.), changed to quarterly monitoring for Total Copper and Total Silver and added quarterly monitoring for Total Chromium. • Sheet A.(2) - 3.0 MGD: Based on Reasonable Potential (to. exceed Water Quality Standards) Assessment (RPA) and our permitting strategy for metals, removed monitoring for Total Lead, Total Selenium, and Total Zinc, removed limits for Total Lead (Daily Max.), and Total Selenium (both Weekly Average and Daily Max.), changed to quarterly monitoring for Total Copper and Total Silver and added Monthly Average and Daily Maximum limits with monthly monitoring for Total Chromium. • Sheet A.(3) - 4.5 MGD: Based on Reasonable Potential (to exceed Water Quality Standards) Assessment (RPA) and our permitting strategy for metals, removed monitoring for Total Lead, Total Selenium and Total Zinc, removed limits for Total Lead (Daily Max.), Total Mercury (Weekly Average) and Total Selenium (both Weekly Average and Daily Max.), changed to Quarterly monitoring for Total Copper and Total Silver and. added Monthly average and Daily Maximum limits with monthly monitoring for Total Chromium. We did receive comments from the North Carolina Wildlife Resources Commission. They are concerned about chlorine and ammonia exposure to federal and state endangered James Spinymussel and Roanoke Logperch, federal species of concern and state endangered Green Floater, state threatened Bigeye Jumprock, state special concern Notched Rainbow and Riverweed Darter, and the state significantly rare Roanoke Hogsucker. They requested, and DWQ strongly agrees, that you should consider converting to an alternate disinfection agent, such as Ultra Violet light, to replace chlorine/ dechlorination. They also requested site -specific Water Quality Standards for ammonia -nitrogen. A review of your DMRs shows that you are doing a good job of controlling ammonia -nitrogen. We strongly encourage you to remain vigilant regarding ammonia -nitrogen control. The ammonia -nitrogen limits will be reevaluated at the next renewal. If any parts, measurement frequencies, or sampling requirements contained in this permit are unacceptable, you have the right to an adjudicatory hearing upon written request within thirty (30) days after receiving this letter. Your request must take the form of a written petition conforming to Chapter 150B of the North Carolina General Statutes, and must be filed with the Office of Administrative Hearings, 6714 Mail Service Center, Raleigh, North Carolina 27699-6714. Unless such demand is made, this permit remains final and binding. This permit is not transferable except after notifying the Division of Water Quality. The Division may • modify and re -issue, or revoke this permit. Please notice that this permit does not affect your legal obligation to obtain other permits required by the Division of Water Quality, the Division of Land Resources, the Coastal Area Management Act, or other federal or local governments. If you have questions, or if we can be of further service, please contact Jim McKay at james.mckay@ncdenr.gov or call (919) 807-6404. Sincerely, ge Thomas A. Reeder Enclosure: NPDES Peimmmit FINAL NC0021873 - Town of Mayodan WWTP cc: Winston-Salem Regional Office, Surface Water Protection with Fact Sheet EPA Region 4, Atlanta, with Fact Sheet - via email NPDES Unit Central Files Monti Hassan, PERCS with Fact Sheet Aquatic Toxicology, Susan Meadows - via email NCWRC, Shari L. Bryant - via email STATE OF NORTH CAROLINA . DEPARTMENT OF ENVIRONMENT *AND NATURAL RESOURCES DIVISION OF WATER QUALITY PERMIT TO DISCHARGE WASTEWATER UNDER THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) 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 Mayodan is hereby authorized to discharge wastewater from a facility located at the Mayodan WWTP NC Highway 135 West, southeast of Mayodan Rockingham County to receiving waters designated as the Mayo River in the Roanoke River Basin in accordance with effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, III and IV hereof. The permit shall become effective August 1, 2013. This permit and the authorization to discharge shall expire at midnight on May 31, 2017. Signed this day July 12, 2013. Thomas A. Reeder, Acting Director / Division of Water Quality By Authority of the Environmental Management Commission Permit NC0021873 3 SUPPLEMENT TO PERMIT COVER SHEET All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby revoked, and as of this 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 described herein. The Town of .Mayodan is hereby authorized to: 1. Continue to operate an existing 4.5 MGD wastewater treatment facility that includes the following wastewater treatment components: ■ Mechanical bar screen • Dual path aeration basins • Secondary clarifiers V • Liquid Chlorination ■ Liquid Dechlorination ■ Effluent flow meter • Sludge thickener � • Aerobic digester ■ Backup generator/ This permitted facility is located off NC Highway 135 southeast of Mayodan in Rockingham County. 2. Continue to operate at 2.5 MGD wastewater treatment facility until the average flow for any calendar year exceeds 80% of the permitted flow (2.0 MGD), after which time the facility must monitor in accordance with effluent limitations and monitoring requirements specified for 3.0 MGD, and 3. Continue to operate at 3.0 MGD wastewater treatment facility until the average flow for any calendar year exceeds 80% of the permitted flow (2.4 MGD), after which time the facility must monitor in accordance with effluent limitations and monitoring requirements specified for 4.5 MGD, and 4. Discharge from said treatment works via Outfall 001 [specified on the attached map] into the Mayo River, a Class C waterbody within the Roanoke River Basin. Page 2 of 9 Permit NC0021873 . b R '$• i t • + May 1 .iY7 1f Q i; y y+ 1. . Dan . ` ,\ . '.. . fj �./-• • � _ ;-� J '� • ., — ►'�' +` Outfall 001 Approximate Property Boundary -wt.�•11. to,% •� SE) -/' 71 �! _(flows �X. Blab • . CO S.. N, Z : 1 \`` • : LYE r1 lak•T } d; (-J.' il ;• Z • +4 • .d k!, IliKAI 1 1 ~� y 6741% ,� of N.1 3 � • v �� `� USHWY220 J i ce / I t e.!'• • a. ~ i. 4 4 1 I I / 1 J�'('` 11 '� '►" •f '', �. i:l ).:lam j `_dir •i .lei • -✓ f j `� • �' * 1.t1oll Ste: l0/1) Facility Town of Mayodan %TP Latitude: 35 2f.25" N State CA&Ouad: B19 NW/Mayada:; NC LocationAllidlifF) (not to soda) Loot hales 77 57'S6" W Permitted Flow; 25/3.CV4SMGD R2Ca.a+eSixanu Mayo River DrainageBame RoanokeRiverBasin r North NPDES Permit No, NC0021873 : C Sub -Basin' 03-02-02 Stream Class: Rockingham County PatrP of Q Permit NC0021873 A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (2.5 MGD) Beginning on the permit effective date and lasting until the twelve (12) month average flow for any calendar year exceeds- 2.0 MGD, or until permit 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: 1 LAV[ tI A`�`l.'• Q S 1 , NTS glit -. .� .... N?0 4 I R 'Q PARAME jR' • - r • mnty Averge� eklly W• en Aerae; - ---- 'r Da z _,::�mum sia�rem:e igiTA' �� . rF amble Location e._ ,-- � T9Irkr _ ._ _.... Flow 2.5 MGD Continuous Recording Influent or Effluent BOD, 5-day, 20°C 1 30.0 mg/L 45.0 mg/L 2/Week Composite Influent and Effluent Total Suspended Solids 1 30.0 mg/L 45.0 mg/L 2/Week Composite Influent and Effluent NH3 as N (Apr 1 - Oct 31) ' 16.0 mg/L 35.0 mg/L • 2/Week Composite Effluent NH3 as N (Nov 1- Mar 31) Weekly Composite Effluent Total Residual Chlorine 2 28 µg/L 3/Week Grab Effluent Fecal Coliform (geometric mean) 200/100 ml 400/100 ml 3/Week Grab Effluent pH > 6.0 and < 9.0 standard units 3/Week Grab Effluent, Up, Down 3 Dissolved Oxygen 3/Week Grab Effluent, Up, Down 3 Temperature 3/Week Grab Effluent, Up, Down 3 Conductivity 3/Week Grab Effluent, Up, Down 3 Total Nitrogen (NO2+NO3+TKN) Monthly Composite Effluent Total Phosphorus Monthly Composite Effluent Total Chromium Quarterly 5 Composite Effluent Total Mercury 4 47 ng/ L Annual Average Quarterly Grab Effluent Total Silver Quarterly 5 Composite Effluent Total Copper Quarterly. 5 Composite Effluent Chronic Toxicity 6 Quarterly Composite Effluent Effluent Pollutant Scan Monitor and Report Footnote 7 Footnote 7 Effluent Notes: 1. The monthly average effluent BODS and TSS concentrations shall not exceed 15% of the respective influent value (i.e., 85% removal is required). 2. Limit and monitoring apply only if chlorine or chlorine derivatives are used for disinfection. The Division shall consider all effluent TRC values reported below 50 µg/L to be in compliance with the permit. However, the Permittee shall record and submit all values reported by a North Carolina certified laboratory (including field certified), even if these values fall below 50 µg/L. 3. See Part A. (6.) for instream sampling requirements. 4. Mercury sampling and analyses shall be conducted using techniques described in USEPA test Method 1631E. 5. Sample in conjunction with Quarterly Toxicity Test. 6. Chronic Toxicity (Ceriodaphnia) at 5 % with testing in March, June, September and December [see A. (4.)]. 7. The permittee shall perform three Effluent Pollutant Scans during the term of this permit [see A. (5.)]. The Permittee shall discharge no floating solids or foam visible in other than trace amounts. Page 4 of 9 Permit NC0021873 0 A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (3.0 MGD) During the period after the twelve (12) month average flow exceeds 2.0 MGD and lasting until the twelve (12) month average flow for any calendar year exceeds 2.4 MGD, or until permit expiration, the Permittee is authorized to discharge from Outfall 001. Such discharges shall be limited and monitored by the Permittee as specified below: . CPr • •H ER , 4 t" . x` ' t Ty O M NBI'O Il�-44 .QUiR' � L � . _ }ME0% , E.�' b�,4UE , ., . ..-42.. _:. _ _.-'i.�__ — A" , _.s_:....� ._.,� : . '%� *� � , Monthl f Y Average : _ �. L�~ =Week' , r Y ;.Average T....r -y..�ti.�,� l� r�•,,,,Dail : - ,Y Maximum 3�.'S»..:.+ V 1 easuremenf''' Ll .-;. Sample Type` fir'. �+ _ ,y Y `, Sampl'eLocon Frequency• Flow 3.0 MGD Continuous Recording Influent or Effluent BOD, 5-day, 20°C 1 . 30.0 mg/L 45.0 mg/L 2/Week Composite Influent and Effluent Total Suspended Solids' 30.0 mg/L 45.0 mg/L 2/Week Composite Influent and Effluent NH3 as N (Apr 1 - Oct 31) 14.0 mg/L 35.0 mg/L 2/Week Composite Effluent NH3 as N (Nov 1— Mar 31) Weekly Composite Effluent Total Residual Chlorine 2 28 µg/L Daily Grab Effluent Fecal Coliform • (geometric mean) 200/100 ml 400/100 ml Daily Grab Effluent pH > 6.0 and < 9.0 standard units Daily Grab Effluent, Up, Down 3 Dissolved Oxygen Daily Grab Effluent, Up, Down 3 Temperature Daily Grab Effluent, Up, Down 3 Conductivity Daily Grab Effluent, Up, Down 3 Total Nitrogen (NO2+NO3+11(N) Monthly Composite Effluent Total Phosphorus Monthly Composite Effluent Total Chromium 856 µg/L 14,500 µg/L Monthly 5 Composite Effluent Total Mercury 4 47 ng/ L Annual Average Quarterly Grab Effluent Total Silver Quarterly 5 Composite Effluent Total Copper Quarterly 5 Composite Effluent Chronic Toxicity 6 Quarterly Composite Effluent Effluent Pollutant Scan Monitor and Report Footnote 7 Footnote 7 Effluent Notes: 1. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15% of the respective influent value (i.e., 85% removal is required). 2. Limit and monitoring apply only if chlorine or chlorine derivatives are used for disinfection. The Division shall consider all effluent TRC values reported below 50 µg/L to be in compliance with the permit. However, the Permittee shall record and submit all values reported by a North Carolina certified laboratory (including field certified), even if these values fall below 50 µg/L. 3. See Part A. (6.) for instream sampling requirements. 4. Mercury sampling and analyses shall be conducted using techniques described in USEPA test Method 1631E. 5. Sample in conjunction with Quarterly Toxicity Test. 6. Chronic Toxicity (Ceriodaphnia) at 6% with testing in March, June, September and December [see A. (4.)]. 7. The permittee shall perform three Effluent Pollutant Scans during the term of this permit [see A. (5.)]. The Permittee shall discharge no floating solids or foam visible in other than trace amounts. Page 5 of 9 Permit NC0021873 A. (3.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (4.5 MGD) During the period after the twelve (12) month average flow for any calendar year exceeds 3.0 MGD, and lasting until permit expiration, the Permittee is authorized to discharge from Outfall 001. Such discharges shall be l;m;+ed and monitored by the Permittee as specified below. LIIVIITATIONS_ ... , _ :1V ONTTORIngy EQUIREMENTS } _.- ;EFFLUENT PARAMETER F �;z =Y - onfhlyr '. a fi cC' .fig —*1-------, Weekly` L- era a L1r,+"di ..� s... , , i- Daly i._ 1q:'R ..�i sycem ent� ` Requeney I.�a.l. rG...,....... 5a n le ,_ e. ..r3 c .. .. ;Y.. _ Sam Ie,Loca .. 1 . Flow 4.5 MGD Continuous Recording Influent or Effluent BOD, 5-day, 20°C 1 30.0 mg/L 45.0 mg/L 2/Week Composite Influent and Effluent Total Suspended Solids 1 30.0 mg/L 45.0 mg/L 2/Week Composite Influent and Effluent NH3 as N (Apr 1- Oct 31) 9.0 mg/L 27.0 mg/L 2/Week Composite Effluent NH3 as N (Nov 1 - Mar 31) 31.5 mg/L 35.0 mg/L 2/Week Composite Effluent Total Residual Chlorine 2 28 µg/L Daily Grab Effluent Fecal Coliform (geometric mean) 200/100 ml 400/100 ml Daily Grab Effluent pH 1/ > 6.0 and < 9.0 standard units Daily Grab Effluent, Up, Down 3 Dissolved Oxygen , ; • Daily Grab Effluent, Up, Down 3 Temperature ) ` - Daily Grab Effluent, Up, Down 3 Conductivity i Daily Grab Effluent, Up, Down 3 Total Nitrogen (NO2+NO3+TKN) Monthly Composite Effluent Total Phosphorus Monthly Composite Effluent Total Chromium 587 µg/L 10,000 µg/L Monthly 5 Composite Effluent Total Mercury 4 47 ng/ L Annual Average Quarterly Grab Effluent Total Silver Quarterly 5 Composite Effluent Total Copper Quarterly 5 Composite Effluent Chronic Toxicity 6 Quarterly Composite Effluent Effluent Pollutant Scan Monitor and Report Footnote 7 Footnote 7 Effluent Notes: 1. The monthly average effluent BODS and TSS concentrations shall not exceed 15% of the respective influent value (i.e., 85% removal is required). 2. Limit and monitoring apply only if chlorine or chlorine derivatives are used for disinfection. The Division shall consider all effluent TRC values reported below 50 µg/L to be in compliance with the permit. However, the Permittee shall record and submit all values reported by a North Carolina certified laboratory (including field certified), even if these values fall below 50 µg/L. 3. See Part A. (6.) for instream sampling requirements. 4. Mercury sampling and analyses shall be conducted using techniques described in USEPA test Method 1631 E. 5. Sample in conjunction with Quarterly Toxicity Test. 6. Chronic Toxicity (Ceriodaphnia) at 9 % with testing in March, June, September and December [see A. (4.)]. 7. The permittee shall perform three Effluent Pollutant Scans during the term of this permit [see A. (5)] The Permittee shall discharge no floating solids or foam visible in other than trace amounts. Page 6 of 9 Permit NC0021873 • A. (4.) QUARTERLY CHRONIC TOXICITY PERMIT LIMIT, ALL FLOW REGIMES The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to Ceriodaphnia dubia at an effluent concentration of 5% at 2.5 MGD flow regime, 6% at 3.0 MGD flow regime, and 9% at 4.5 MGD flow regime. 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 March, June, September and December. These months signify the first month of each three month toxicity testing quarter assigned to the facility. Effluent sampling for this testing must be obtained during representative effluent discharge and 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, DWQ Form AT-3 (original) is to be sent to the following address: Attention: North Carolina Division of Water Quality 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. 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 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 than 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, 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 7 of 9 Permit NC0021873 - 4. 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: 2014, 2015, and 2016. 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 toxicitytest 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/Nitrite Kjeldalil nitrogen Oil and grease Phosphorus Total dissolved solids Hardness Antimony Arsenic Beryllium Cadmium Chromium Copper Lead Mercury (EPA Method 1631E) Nickel Selenium Silver Thallium Zinc Cyanide Total phenolic compounds Volatile organic compounds: Acrolein Acrylonitrile Benzene Bromoform Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane 2-chloroethylvinyl ether Chloroform Dichlorobromomethane 1,1-dichloroethane 1,2-dichloroethane Trans-1,2-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-trichloroethane 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-nitrophenol 4-nitrophenol Pentachlorophenol Phenol 2,4,6-trichlorophenol 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-dinitrotoluene 1,2-diphenylhydrazine Fluoranthene Fluorene Hexachlorobenzene Hexachlorobutadiene Hexachlorocyclo-pentadiene Hexachloroethane Indeno (1, 2, 3-cd)pyrene Isophorone Naphthalene Nitrobenzene N-nitrosodi-n-propylamine N-nitrosod methylamine N-nitrosodiphenylamine Phenanthrene Pyrene 1,2,4-trichlorobenzene Reporting. Test results shall be reported on DWQ Form -A MR PPA1 (or in a form approved by the Director) by December 30 of each designated sampling year: The report shall be submitted to the following address: NC DENR / DWQ / Central Files, 1617 Mail Service Center, Raleigh, North Carolina 27699-1617. Page 8 of 9 Permit NC0021873 A. (6.) INSTREAM MONITORING REQUIREMENTS Parameter Monitoring Requirements Measurement Frequency Sample Type Sample Location Dissolved Oxygen June -September 3/week Grab Upstream at NC Hwy 135, Downstream at NCSR 2177 October -May 1/week Temperature June -September 3/week Grab Upstream at NC Hwy 135, Downstream at NCSR 2177 October -May 1/week pH June -September 3/week Grab Upstream at NC Hwy 135, Downstream at NCSR 2177 October -May 1/week Conductivity June -September 3/week Grab Upstream at NC Hwy 135, Downstream at NCSR 2177 1/week A.(7.) MERCURY MINIMIZATION PLAN (MMP). Mercury Minimization Plan (MMP). The permittee shall develop and implement a mercury minimization plan during this permit term. The MMP shall be developed by January 28, 2014 (180 days from the NPDES Permit Effective Date), and shall be available for inspection on -site. A sample MMP was developed through a stakeholder review process and has been placed on the Division website for guidance (http://portal.ncdenr.org/web/wq/swp/ps/npdes), under Model Mercury Minimization Plan. The MMP should place emphasis on identification of mercury contributors and goals for reduction. Results shall be summarized and submitted with the next permit renewal. Page 9 of 9 Avral NCDENR North Carolina Department of Environment and Natural Resources Division of Water Quality Pat McCrory Thomas A. Reeder John E. Skvarla, III Governor Acting Director Secretary June 24, 2013 Shari L. Bryant Piedmont Region Coordinator Habitat Conservation Program NC Wildlife Resources Commission 1721 Mail Service Center Raleigh, NC 27699-1721 Subject: Review comments NPDES Permit NC0021873 Mayodan Wastewater Treatment Plant Rockingham County Dear Ms. Bryant: Thank you for your review of the draft renewal of NPDES Permit NC0021873 for the Mayodan Wastewater Treatment Plant in Rockingham County. In the review, you made two requests for changes, based on the presence of rare, threatened and endangered aquatic life species: 1. To encourage the Permittec to switch to an alternate disinfection media from chlorine, and, 2. To develop site specific ammonia limits in order to better protect sensitive rare, threatened and protected mussels and other aquatic life. (1.) We have no mechanism for requiring disinfection with alternatives to chlorination as long as the permittee is in compliance with permit limits and is not expanding the plant capacity or changing the treatment. A review of Discharge Monitoring Reports for 2010 through October, 2012 shows all samples were below detection levels at less than 10 µg/ L. The facility conducts regular quarterly Whole Effluent Toxicity Tests in accordance with EPA and NC requirements at the IWC concentration. They failed one test in April 2000, but have passed all subsequent tests (over 52 consecutive tests). I will add language to the Cover Letter to the final permit to inform the permittee of this concern, and strongly recommend that he investigates converting to UV disinfection from chlorination/ dechlorination. 1617 Mail Service Center, Raleigh, North Carolina 27699-1617 Location: 512 N. Salisbury St. Raleigh, North Carolina 27604 Phone: 919.807-63001 FAX: 919-807-64989 Internet: www.ncwateraualitv.orq An Equal opportunity l Affirmative Action Employer NorthCarolina atura!!ji (2.) The plant is currently meeting all ammonia - nitrogen water quality limits. I have calculated the in -stream ammonia concentration using DMR data for effluent flow and ammonia - N concentration and conservative 7Q10 flows for the Mayo river at the discharge site. The Division uses 0.22 mg/ L as the normal background ammonia concentration for evaluations. The resulting calculated in -stream concentrations were generally the same or slightly higher than the background ammonia-N concentrations (0.22 to 0.25 mg/ L), allowing for 7Q10 dilution. The highest instream concentration was 0.45 mg/ L in May 2010. See attached Ammonia-N predicted lnstream Concentrations, Mayo WWTP 2010 - October 2012. Again, language will be added to the permit cover letter addressing the concerns about ammonia and sensitive aquatic life, encouraging the facility to continue addressing ammonia discharges. Thank you again for your review. Sincerely, p:„.„.., /r c / Jim McKay Complex NPDES Permitting NC0021873 Ammonia-N predicted Instream Concentrations, Mavo WWTP 2010 - October 2012 Based on DMR Data and 7Q10 Flows Monthly Calculated Avg. Monthly Avg. Ammonia-N Ammonia-N Ammonia-N Monthly Avg. Effluent Effluent In -Stream In -Stream Discharge Limit, Effluent Flow Flow Ammonia-N 7Q10 Concentration Standard (Monthly Avg.) Date MGD cfs mg/ L cfs mg/ L mg/ L mg/ L Jan-10 1.487 2.30 1.12 131 0.24 1.8 Feb-10 1.792 2.78 0.51 131 0.23 1.8 Mar-10 1.368 2.12 0.60 131 0.23 1.8 Apr-10 1.063 1.65 4.50 75 0.31 1.0 16 May-10 0.803 1.24 14.35 75 0.4S 1.0 16 Jun-10 0.724 1.12 10.47 75 0.37 1.0 16 Jul-10 0.751 1.16 0.28 75 0.22 1.0 16 Aug-10 0.959 1.49 0.23 75 0.22 1.0 16 Sep-10 0.848 1.31 0.71 75 0.23 1.0 16 Oct-10 1.216 1.88 1.31 75 0.25 1.0 16 Nov-10 0.898 1.39 0.51 131 0.22 1.8 Dec-10 1.04 1.61 1.34 131 0.23 1.8 Jan-11 0.884 1.37 1.22 131 0.23 1.8 Feb-11 0.847 1.31 0.23 131 0.22 1.8 Mar-11 1.393 2.16 1.41 131 0.24 1.8 Apr-11 1.108 1.72 1.98 75 0.26 1.0 16 May-11 1.092 1.69 1.35 75 0.24 1.0 16 Jun-11 0.797 1.24 0.30 75 0.22 1.0 16 Jul-11 0.722 1.12 0.22 75 0.22 1.0 16 Aug-11 0.702 1.09 0.77 75 0.23 1.0 16 Sep-11 0.776 1.20 1.96 75 0.25 1.0 16 Oct-11 0.786 1.22 0.32 75 0.22 1.0 16 Nov-11 0.98 1.52 2.28 131 0.24 1.8 Dec-11 0.91 1.41 0.86 131 0.23 1.8 Jan-12 0.911 1.41 0.11 131 0.22 1.8 Feb-12 0.787 1.22 0.83 131 0.23 1.8 Mar-12 1.181 1.83 0.30 131 0.22 1.8 Apr-12 0.921 1.43 1.32 75 0.24 1.0 16 May-12 0.811 1.26 0.50 75 0.22 1.0 16 Jun-12 0.653 1.01 0.34 75 0.22 1.0 16 JuI-12 0.66 1.02 0.36 75 0.22 1.0 16 Aug-12 0.794 1.23 1.04 75 0.23 1.0 16 Sep-12 0.753 1.17 0.23 75 0.22 1.0 16 Oct-12 0.758 1.17 1.11 75 0.23 1.0 16 0.24 Average 0.45 Maximum 0.22 Minimum 40 30 J E 20 MAYODAN WWTP Monthly BOD 10— 0 I I I I I O O O T T T L as oTs O T O 0 Z � Q CO T 0 Z Date (1/1/2010 to 12/31/2012 ) / Effluent BOD mg/L (Mo Avg) N cca I IIIIII N N N CO T T T T Cr)- as o as Z W/MS (NC MAYODAN WWTP) Effluent BOD Monthly MoMaxLimit I 50 40 30 MAYODAN WWTP Weekly BOD 20- 10 A 1 1 I 00 Ao joAl\,,- 1/3/10 4/11/10 7/18/10 10/24/10 1/30/11 5/8/11 8/14/11 11/20/11 2/26/12 6/3/12 0 I 1 i\rW\, I A I I I I I Week Ending Dates (1/1/2010 to 12/31/2012 ) / Effluent BOD mg/L (Wk Avg) I I WklyMaxLimit 9/9/12 12/16/12 3/24/13 WIM5 (NC MAYODAN WWTP) Effluent SOD Weekly 40 30 MAYODAN WWTP Monthly TSS -J E 20- 10 0 0 0 0 0 0 r ✓ r r r r r r r C L. >+ = n > c Bg � - v) Z - 2 as r 0_ 0 z Date (1 /1 /2010 to 12/31 /2012 ) / Effluent TSS mg/L (Mo Avg) r C0 { N CB N_ N C2 a) { W1MS (NC MAYODAN WWTP) Effluent BOD Monthly MoMaxLimit 100 80 60- 40 MAYODAN WWTP Weekly TSS 20— L vi\,"/ r i 0 l l i i � l„ 1/3/10 4/11/10 7/18/10 10/24/10 1/30/11 5/8/11 8/14/11 11/20/11 2/26/12 6/3/12 9/9/12 12/16/12 3/24/13 WklyMaxLimit Week Ending Dates (1/1/2010 to 12/31/2012 ) / Effluent TSS mg/L (Wk Avg) W1MS (NC MAYODAN WWTP) Effluent TSS Weekly 15 0 T T 0 MAYODAN UVWTP Monthly Ammonia T T T T T T T T L o^+ L W 0 CIS CC1 -, 2 M CO Z - 2 Date (1 /1 /2010 to 12/31 /2012 ) / Effluent NH3 N mg/L (Mo Avg) WIMS (NC MAYODAN WWTP) Effluent Ammonia Monthly 25 20-- 15-- J as E 10 5 0 1 r MAYODAN WWTP Weekly Ammonia I 1 I 1 1 1 U I rll....._ `_+__.` ll.,,r. ILIA 1/3/10 4/11/10 7/18/10 10/24/10 1/30/11 5/8/11 8/14/11 11/20/11 2/26/12 6/3/12 9/9/12 12/16/12 3/24/13 Week Ending Dates (1/1/2010 to 12/31/2012 ) / Effluent NH3 N mg/L (Wk Avg) WIMS (NC MAYODAN WWTP) Effluent Ammonia Weekly 250—T 200 150 MAYODAN WVVTP Monthly Fecal Coliform Date (1 /1 /2010 to 12/31 /2012 ) / Effluent Fecal #/100 Mo (Mo Avg) WIMS (NC MAYODAN WWTP) Effluent BOD Monthly MoMaxLimit MAYODAN 1NV TP Weekly Fecal Coliform 1 1 j I "� -mot Week Ending Dates (1/1/2010 to 12/31/2012 ) / Effluent Fecal #/100 We (Wk Avg) W/MS (NC MAYODAN WWTP) Effluent Fecal Coliform Weekly WklyMaxL DENR/DWQ Table 1 FACT SHEET FOR NPDES PERMIT DEVELOPMENT NPDES NC0021873 Facility Sum mary General Information Applicant/Facility Name: Town of Mayodan WWTP Applicant Address: 210 W. Main Street, Mayodan, NC 27027 Facility Address: 293 Caldwell Road, Mayodan, NC 27027 Permitted Flow (Compliance keyed on 80 % of tiered flow) 2.5 MGD (existing) 3.0 MGD (existing) 4.5 MGD (existing) Type of Waste: Domestic and Industrial Facility Classification: Class III (2.5 MGD), Class IV (3.0 & 4.5 MGD) Permit Status: Renewal County: Rockingham Discharge Location and Conditions Receiving Stream: Mayo River Regional Office: W-SRO Stream Classification: C State Grid: B 19 NW 303(d) Listed? Not on 2012 Approved list. USGS Quad: Mayodan, NC Basin: Roanoke Permit Writer: Jim McKay Subbasin: 03 02 02 HUC: 0301010304 Date: June 28, 2013 Drainage Area (mi2) 312 (Not To Scale) Lat. 36° 24' 25" N Long. 79° 57' 56" W Summer 7Q10 (cfs) 75 Winter 7Q10 (cfs): 131 30Q2 (cfs) 150:. Average Flow (cfs) 362 I WC (%) 5 % (2.5MGD) 6 % (3.0 MGD) 9% (4.5 MGD) Introduction The Town of Mayodan Wastewater Treatment Plant (WWTP), herein called Mayodan or the Permittee, requires a National Pollutant Discharge Elimination System (NPDES) permit to dispose treated wastewater to the surface waters of the state. The Permittee's 5-year NPDES permit expired May 31, 2012 and they have requested renewal from the Division of Water Quality (the Division). This Fact Sheet summarizes background information and rationale used by the Division's NPDES Unit to determine permit limits and monitoring conditions. Existing Treatment System: As a regional facility, Mayodan services 2,505 local residents plus industry, and receives industrial and domestic influent flow from the towns of Stoneville (1,118 residents) and Madison (2,423 residents). In 2002 the Town applied for expansion from 3.0 MGD to 4.5 MGD in order to add service to Stoneville and Madison. In 2007, as a result of loss of a major SIU, the Town applied for a flow reduction modification to the permit in order to downgrade to 2.5 MGD, thereby going from a Class IV to a Class III facility with corresponding relaxed limits and monitoring conditions. The average discharge for the period of 2010 through October 2012 is 0.946 MGD. Fact Sheet NPDES NC0021873 Renewal Page 1 Permittee's Renewal Application: The current permit expired on May 31, 2012. The Division received the Permittee's request to renew the permit (EPA Form 2A) on December 19, 2011. Regional Office Report: Winston-Salem Regional Office (W-SRO) inspector Aana Taylor -Smith conducted an annual facility inspection on April 17, 2013. The facility was found to be in good condition and well maintained. A couple of minor problems were identified: the sample tubing for the influent composite sampler needed to be replaced, and there was a screw loose on one of the secondary clarifier skimmer arms, causing it to be tilted. Both were corrected by the facility. Waste Load Allocation (WLA): The Division prepared the last WLA in 2007 for the receiving stream and developed effluent limits and monitoring requirements considering an in -stream waste concentration (IWC) of 4.91 % (2.5 MGD), 5.84 % (at 3.0 MGD), and 8.51 % (at 4.5 MGD). These IWCs have been rounded up to 5%, 6% and 9%, respectively for Whole Effluent Toxicity testing. The Division views the limits and monitoring requirements appropriate for renewal except as outlined below (see Renewal Summary). Existing Stream Conditions: The Permittee discharges to the Mayo River [Stream Index 22-30-(10)]; this segment is a Class C waterbody within the Roanoke River Basin. The Mayo River is not listed on North Carolina's 303d list of impaired waters (Final 2012). The Mayo River is classified as Good for benthic microinvertebrates near the NC -VA border and is classified as Good -Fair downstream of the discharge at the confluence with the Dan River. Pre-treatment: Mayodan has an approved Pretreatment Program under federal and state regulations (40CFR 403 and NC State 15A NCAC 2H.0900), and this program will continue with renewal. Mayodan is a regional WWTP serving the towns of Mayodan, Stoneville, and Madison. Mayodan regulates all Significant Industrial Users (SIUs) in its service area, currently totaling two SIUs: Unifi Sans, which produces spun nylon fiber, permitted flow is 0.0234 MGD; and Unifi 105, which produces textured and covered nylon fiber, permitted flow is 0.103 MGD. Neither is categorical. DMR Effluent Data Review: Mayodan's monthly Discharge Monitoring Reports (DMRs) appear regular, thorough, and complete. The Division compared effluent flow rates from January 2010 through March 2012. The Division also evaluated data for metals and toxicants during the same time period (see Reasonable Potential Analysis). Whole Effluent Toxicity: The permit has a requirement for a quarterly chronic toxicity test at 5 % at 2.5 MGD flow regime using ceriodaphnia. The Division reviewed Mayodan's quarterly Whole Effluent Toxicity records from January 2008 through December 2012 (20 quarterly tests). Mayodan passed all toxicity testing during this 5-year period. The Permittee also conducted second -species WET testing during the months of April 2011, July 2011, and September 2011. All test results were reported as "pass." Instream Monitoring: The current permit requires monitoring in -stream for pH, Temperature, D.O. and conductivity. A review of DMR data from 2010 through 2012 shows very little difference between upstream and downstream data. In general, pH downstream was 0.1 to 0.2 S.U. lower than upstream, Temperature downstream was within 1 degree C of upstream, D.O. downstream was within 0.1 to 0.2 mg/ L of upstream, and conductivity downstream was within 1 to 2 µmhos/ cm of the upstream value. All conductivity values upstream and down are in the 60 to 70 µmhos/ cm range. This is expected due to the large dilution in the Mayo River. At 2.5 MGD the IWC is 4.9%; at the 3 year average flow of 0.946 mgd and 7Q10 flow, IWC is 1.9%. Recommendation: Retain current in -stream monitoring program. Conductivity monitoring is maintained due to industrial contributions to the WWTP. Fact Sheet NPDES NC0021873 Renewal Page 2 PERMIT RENEWAL Chronic Reasonable Potential Analysis (RPA): In order to establish a list of Pollutants Of Concern (POCs), the Division examined the permit application, pretreatment data, DMRs (2010 through March 2012), and the Basin Plan. The Division conducted RPA for each proposed flow of 2.5 MGD, 3.0 MGD and 4.5 MGD, using 7Q10 dilution, to calculate a maximum predicted concentration for each POC (see attached RPA Summary sheets). Each maximum was then compared to the POC's freshwater Standard or allowable concentration (Tables 2, 3, and 4). If by this method, a POC showed reasonable potential (RP) to exceed its Standard or criteria, the Division included a permit limit as a Monthly Average to protect against chronic toxicity impacts. Acute RPA: Similar to the Chronic RPA, the Division compared each POC's maximum predicted concentration to the freshwater Final Acute Value ('/2 FAV) or EPA Criteria Maximum Concentration (CMC) to establish the potential for acute toxicity (Tables 2, 3, and 4). The acute RPA uses 1 Q 10 dilution. If by this method, a POC showed reasonable potential to exceed its freshwater 1/2 FAV/CMC, the Division included this allowable concentration as a permit limit Daily Maximum to protect the receiving stream against acute toxic affects. Table 2 RPA - 2.5 MGD Parameter Chronic Allowable OWL) Acute Allowable (t ) Maximum Predicted (!�) RP � Comments Arsenic AL 1,018.3 N/A 7.9 N Monitored by LTMP only. Arsenic HH 943.4 N/A 7.9 N Monitored by LTMP only. Cadmium 40.7 252.5 12.3 N Monitored by LTMP only. Chromium 1,018.3 17,205.4 886 N Add Quarterly monitoring only. Copper 142 122.9 107 N Action Level parameter — no apparent toxicity, change monitoring to Quarterly from 2/ Month. Cyanide 102 370.4 15.8 N Monitored by LTMP only. Lead 509 569 6.6 N Remove limit and monitoring from permit. Continue monitoring on LTMP. Mercury 12 ng/ L N/A 729.6 ng/L Y Add new 47 ng/ L Annual Average Limit with Quarterly monitoring, per Statewide TMDL. Nickel 1,791 4,393.9 15.8 N Not detected in 9 samples. Monitored by LTMP only. Selenium 102 942.8 5.0 N Remove limit and monitoring from permit. Continue monitoring on LTMP. Silver 1.2 20.7 3.025 Y Action Level parameter — no apparent toxicity, change monitoring to Quarterly from 2/ Month. Zinc 1,018 1,127.9 283.4 N Action Level parameter — no apparent toxicity. Remove monitoring from permit. Fact Sheet NPDES NC0021873 Renewal Page 3 RPA-3.0 MGD Parameter Chronic Allowable OWL) Acute Allowable (µlfL) Maximum Predicted (llL) RP Comments Arsenic AL 856.2 N/A 7.9 N Monitored by LTMP only. Arsenic HH 787.4 N/A 7.9 N Monitored by LTMP only. Cadmium 34 15 7 N Monitored by LTMP only. Chromium 856 14,496 886 Y Add Limits and Monthly Monitoring Copper 120 103.5 107 Y Action Level parameter — no apparent toxicity, change monitoring to Quarterly from 2/ Month. Cyanide 86 312 15.8 N Monitored by LIMP only. Lead 428 479.4 6.6 N Remove limit and monitoring from permit. Mercury 206 ng/L N/A 729.6 ng/L Y Add 47 ng/ L Annual Average Limit with Quarterly monitoring, per Statewide TMDL. Nickel 1,507 3,702 15.8 N Not detected in 9 samples. Monitored by LTMP only. Selenium 86 794.3 5.0 N Remove limits and monitoring from permit. Silver 1.0 17.4 3.025 Y Action Level parameter — no apparent toxicity, change monitoring to Quarterly from 2/ Month. Zinc 856 950.4 283.4 N Action Level parameter — no apparent toxicity. Remove monitoring from permit. Fact Sheet NPDES NC0021873 Renewal Page 4 RPA — 4.5 MGD Parameter Chronic Allowable (!L) Acute Allowable (NIIL) Maximum Predicted 01L) RP � Comments Arsenic AL 587.5 N/A 7.9 N Monitored by LTMP only Arsenic HE 529.1 N/A 7.9 N Monitored by LTMP only. Cadmium 23.5 146.9 12.3 N Monitored by LTMP only Chromium 587.5 10,009.8 886.0 Y Add Limits and Monthly Monitoring Copper 82.3 71.5 107 Y Action Level parameter — no apparent toxicity, Change monitoring to Quarterly from 2/ Month. Cyanide 58.8 215.5 15.8 N Monitored by LTMP only Lead 293.8 331.0 6.6 N Remove limit and monitoring. Mercury 12 ng/L N/A 729.6 ng/L y Add 47 ng/ L Annual Average limit with Quarterly monitoring per TMDL. Nickel 1,034 2556.3 15.8 N Not detected in 9 samples. Monitored by LTMP only. Selenium 59 548.6 5.0 N Remove limit and monitoring. Silver 0.7 12 3.025 Y Action Level parameter — no apparent toxicity, change monitoring to Quarterly from 2/ Month. Zinc 588 656.2 27 N Action Level parameter — no apparent toxicity. Remove monitoring from permit. RENEWAL SUMMARY The following changes have been made from the current permit: • Add TRC footnote per permitting strategy. • Revise annual effluent parameter scan to 3 scans per permit cycle during specified years in accordance with revised EPA requirements. • Adjust ammonia limits to not higher than 35 mg/ L. • All monitoring requirements of the LTMP remain in place. • A mercury limit of 47 Ng/ L annual limit with Quarterly monitoring has been added to all flow sheets in keeping with the Statewide Mercury TMDL; the old weekly average mercury limit of 0. 14 µg/ L on the 4.5 MGD sheet was removed. See attached Mercury WQBEL/ TBEL Evaluation worksheets for each flow regime. • A Mercury Minimization Plan (MMP) has been added as Condition A.(7.) in accordance with the recent mercury TMDL implementation strategy. See attached NPDES Permitting for Mercury Implementation of 2012 Statewide Mercury TMDL. • Based on RPA at 2.5 MGD, Sheet A.(1): removed monitoring for lead, selenium, and zinc, based on RPA. Removed limits for Total Lead (Daily Max) and Total Selenium (Weekly Average and Daily Max), based on both acute and chronic standards RPA. Changed to Quarterly monitoring for copper and silver in accordance with our Permitting Strategy for metals. Add Quarterly monitoring for chromium. Add annual average limit and quarterly monitoring for mercury based on the recently approved Mercury TMDL and the Division's implementation strategy. See attached RPA summary sheets for all 3 RPA runs. Fact Sheet NPDES NC0021873 Renewal Page 5 • Based on RPA at 3.0 MGD, Sheet A.(2): removed monitoring for lead, selenium, and zinc based on RPA. Removed limits for Total Lead (Daily Max), and Total Selenium (both Weekly Average and Daily Max), based on standards RPA. Changed to Quarterly monitoring for copper and silver. Add Monthly average and Daily Maximum limits with monthly monitoring for chromium, and annual average limit with quarterly monitoring for mercury. • Based on RPA at 4.5 MGD, Sheet A.(3): removed monitoring for lead, selenium, and zinc, based on RPA. Removed limits for Total Lead (Daily Max), mercury (Weekly Average) and Total Selenium (both Weekly Average and Daily Max), based on standards RPA. Changed to Quarterly monitoring for copper and silver. Add Monthly average and Daily Maximum limits with monthly monitoring for chromium, and annual average limit with quarterly monitoring for mercury. • The facility requested reduction in monitoring frequency for BOD, TSS, Ammonia - Nitrogen and Fecal Coliform based on operating data and the recent Division Strategy for Exceptionally Performing Facilities. Data submitted were reviewed; BOD, TSS, and Ammonia -Nitrogen meet the criteria, fecal coliform does not. See attached work sheet DWQ Guidance Regarding the Reduction of Monitoring Frequencies in NPDES Permits for Exceptionally Performing Facilities (October 22, 2012). As a result, monitoring frequency for BOD, TSS and Ammonia -Nitrogen is reduced to 2 per week for all three flow regimes, as the current facility is rated and permitted for 4.5 MGD; no expansion or new construction is required to go up the flow regime limits pages. Fecal coliform monitoring remains at 3 per week for the 2.5 MGD flow regime, and daily for the 3.0 and 4.5 MGD regimes. DRAFT REVIEW COMMENTS NC Wildlife Resources Commission (WRC) did make comments on the draft renewal permit due to the presence of rare, threatened and endangered aquatic species, including mussels and fish. Specifically they requested that we encourage the permittee to consider switching disinfection to UV or Ozone instead of Chlorine, and that we investigate developing site specific limits for ammonia -nitrogen. In response, we did agree to add language to the permit issuance cover page discussing the WRC concerns and to strongly request the permittee to consider UV or other alternate to chlorination, and to keep working on controlling ammonia -nitrogen discharges. It was pointed out that the recent TRC analysis have all been below detect, and the facility has passed all WET tests since one failed test in April, 2000. The existing NH3-N data was reviewed and in -stream concentrations were calculated from DMR data using 7Q10 dilution and the Division's standard background ammonia-N concentration of 0.22 mg/ L. The results showed mostly background to slightly above background ammonia-N of 0.22 - 0.25 mg/ L, with one hit at 0.45 mg/ L in 2010. See attached Ammonia-N predicted Instream Concentrations, Mayo WWTP 2010 - October 2012. PROPOSED SCHEDULE FOR PERMIT ISSUANCE Draft Permit to Public Notice: Permit Scheduled to Issue: Permit Effective Date: January 2013 July 2013 (Est.) August 1, 2013 Fact Sheet NPDES NC0021873 Renewal Page 6 NPDES DIVISION CONTACT If you have questions regarding any of the above information or on the attached permit, please contact Jim McKay at (919) 807-6404 or by email at James.McKay@ncdenr.gov. NAME: / /1 c REGIONAL OFFICE COMMENTS DATE: /; / sue'' /2 D / iz NAME: DATE: SUPERVISOR: DATE: NPDES SUPERVISOR: DATE: Fact Sheet NPDES NC0021873 Renewal Page 7 Freshwater RPA Table 1. Project Information ❑ CHECK if HQW or ORW only Facility Name WWTP/WTP Class NPDES Permit Outfall Flow, Qw (MGD) Receiving Stream Stream Class 7Q10s (cfs) 7Q10w (cfs) 30Q2 (cfs) QA (cfs) 1Q10s (cfs) Data Source(s) Mayodan WWTP III NC0021873 001 2.500 Mayo River C 75.00 131.00 152.00 362.00 61.34 ❑ CHECK for MODEL DMRs 2010 - 2012 YTD Follow directions for data entry. In some cases a comment menu list the available choices or a dropdown menu will provide a list you may select from. Error message occur if data entry does not meet input criteria. REQUIRED DATA ENTRY Table 2. Parameters of Concern Par01 Par02 Par03 Par04 Par05 Par06 Par07 ParOB Par09 Par10 Par11 Par12 Par13 Par14 Parts Par16 Par17 Par16 Par19 Par20 Par21 Par22 Name Tyl:e Chronic �ecieer Acute PQL Units Arsenic C 50 FW ug/L Arsenic C 10 HHNVS ug/L Beryllium NC 6.5 FW ug/L Cadmium NC 2 FW 15 ug/L Chlorides (AL) NC 230 FW mg/L Chlorinated Phenolic Compounds NC 1 A ug/L Total Phenolic Compounds NC 300 A ug/L Chromium NC 50 FW 1,022 ug/L Copper (AL) NC 7 FW 7.3 ug/L Cyanide NC 5 FW 22 10 ug/L Fluoride NC 1,800 FW ug/L Lead NC 25 FW 33.8 ug/L Mercury NC 12 FW 0.5 ng/L Molybdenum NC 2,000 HH ug/L Nickel NC 88 FW 261 ug/L Selenium NC 5 FW 56 ug/L Silver (AL) NC 0.06 FW 1.23 ug/L Zinc (AL) NC 50 FW 67 ug/L RPA 21873 2.5 MGD 2012, input 6/14/2013 REASONABLE POTENTIAL ANALYSIS Arsenic - FW Standard Date Data BDL=1/2DL Results 1 Jan-10 Std Dev. 2 Feb-10 Mean 3 Mar-10 < 5 2.5 C.V. (default) 4 Apr-10 n 5 May-10 6 Jun-10 Mult Factor = 7 Jul-10 < 5 2.5 Max. Value 8 Aug-10 Max. Pred Cw 9 Sep-10 '< 5 2.5 10 Oct-10 11 Nov-10 12 Dec-10 < 5 2.5 13 Jan-11 14 Feb-11 15 Mar-11 < 5 2.5 16 Apr-11 17 May-11 18 Jun-11 < 5 2.5 19 Jul-11 20 Aug-11 21 Sep-11 22 Oct-11 < 5 2.5 23 Nov-11 24 Dec-11 < 5 2.5 25 Jan-12 26 Feb-12 27 Mar-12 5 2.5 28 SPECIAL- Values" WITH "COPY" 0.0000 2.5000 0.6000 9 3.16 2.5 ug/L 7.9 ug/L Arsenic - HH/WS Standards Date Data BDL=1/2DL Results 1 Std Dev. 0.0000 2 Mean 2.5000 3 3/1/2010 < 5 2.5 C.V. (default) 0.6000 4 n 9 5 6 Mult Factor = 3.16 7 7/1/2010 < 5 2.5 Max. Value 2.5 ug/L 8 Max. Pred Cw 7.9 ug/L 9 9/1/2010 < 5 2.5 10 11 12 12/1/2010 < 5 2.5 13 14 15 3/1/2011 < 5 2.5 16 17 18 6/1/2011 < 5 2.5 19 20 21 22 10/1/2011 < 5 2.5 23 24 12/1/2011 < 5 2.5 25 26 27 3/1/2012 < 5 2.5 28 THIS SECTION RPA 21873 2.5 MGD 2012, data - 1 - 6/14/2013 REASONABLE POTENTIAL ANALYSIS Cadmium Date Data BDL=112DL Results 1 Jan-10 < 1 0.5 Std Dev. 2 Feb-10 Mean 3 Mar-10 C.V. 4 Apr-10 n 5 May-10 < 5 2.5 6 Jun-10 Mult Factor = 7 Jul-10 < 1 0.5 Max. Value 8 Aug-10 Max. Pred Cw 9 Sep-10 10 Oct-10 < 1 0.5 11 Nov-10 12 Dec-10 13 Jan-11 <? 1 0.5 14 Feb-11 15 Mar-11 16 Apr-11 s'; 1 0.5 17 May-11 18 Jun-11 19 Jul-11 0.29 0.29 20 Aug-11 < 1 0.5 21 Sep-11 22 Oct-11 < 1 0.5 23 Nov-11 24 Dec-11 25 Jan-12 < 1 0.5 26 Feb-12 27 Mar-12 28 SPECIAL - Values" WITH "COPY" Chromium 0.6432 0.6790 0.9473 10 4.92 2.5 ug/L 12.3 uglL 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 SPECIAL - Values" WITH "COPY" Date Data BDL=1/2DL Results Jan-10 ci 5 2.5 Std Dev. 18.8156 Feb-10 Mean 8.4500 Mar-10 C.V. 2.2267 Apr 10 n 10 May 10 < 5 2.5 Jun-10 Mult Factor = 14.29 Jul-10 5 2.5 Max. Value 62.0 ug/L Aug-10 Max. Pred Cw 886.0 ug/L Sep-10 Oct-10 < 5 2.5 Nov-10 Dec-10 Jan-11 < 5 2.5 Feb-11 Mar-11 Apr-11 < 5 2.5 May-11 Jun-11 Jul-11 62 62 Aug-11 < 5 2.5 Sep-11 Oct-11 5 2.5 Nov-11 Dec-11 Jan-12 < 5 2.5 Feb-12 Mar-12 -2- RPA 21873 2.5 MGD 2012, data 6/14/2013 REASONABLE POTENTIAL ANALYSIS Copper (AL) Date Data BDL=1/2DL Results 1 Jan-10 8.5 8.5 Std Dev. 2 Feb-10 7.5 7.5 Mean 3 Mar-10 6.0 6 C.V. 4 Apr-10 < 10.0 5 n 5 May-10 11.5 11.5 6 Jun-10 9.5 9.5 Mult Factor = 7 Jul-10 8.7 8.7 Max. Value 8 Aug-10 8.5 8.5 Max. Pred Cw 9 Sep-10 18.3 18.3 10 Oct-10 17.0 17 11 Nov-10 12.5 12.5 12 Dec-10 16.0 16 13 Jan-11 17.5 17.5 14 Feb-11 12.0 12 15 Mar-11 6.3 6.3 16 Apr-11 <' 10.0 5 17 May-11 9.5 9.5 18 Jun-11 33.7 33.7 19 Jul-11 41.0 41 20 Aug-11 48.0 48 21 Sep-11 27.0 27 22 Oct-11 31.0 31 23 Nov-11 30.5 30.5 24 Dec-11 27.5 27.5 25 Jan-12 22.5 22.5 26 Feb-12 24.0 24 27 Mar-12 8.7 8.7 28 SPECIAL - Values" WITH "COPY" Cyanide 11.7066 17.5259 0.6680 27 2.23 48.0 ug/L 107.0 ug/L Date Data BDL=1/2DL Results 1 Jan-10 8 5 Std Dev. 2 Feb-10 Mean 3 Mar 10 C.V. (default) 4 Apr-10 5 May-10 i<: 5 5 6 Jun-10 MuItFactor = 7 Jul-10 < 5 5 Max. Value 8 Aug-10 Max. Pred Cw 9 Sep-10 10 Oct 10 5 5 11 Nov-10 12 Dec-10 13 Jan-11 < 5 5 14 Feb-11 15 Mar-11 16 Apr 11 5 5 17 May-11 18 Jun-11 19 Jul-11 20 Aug-11 <> 5 5 21 Sep-11 22 Oct-11 5 5 23 Nov-11 24 Dec-11 25 Jan-12 < 5 5 26 Feb-12 27 Mar-12 28 SPECIAL - Values" WITH "COPY" 0.0000 5.00 0.6000 9 3.16 5.0 ug/L 15.8 ug/L RPA 21873 2.5 MGD 2012, data - 3 - 6/14/2013 REASONABLE POTENTIAL ANALYSIS Lead Date Data BDL=IJ2DL Results 1 Jan-10 <', 5 2.5 Std Dev. 2 Feb-10 < • 5 2.5 Mean 3 Mar-10 <; 5 2.5 C.V. 4 Apr-10 < 5 2.5 n 5 May-10 < 5 2.5 6 Jun-10 < 5 2.5 Mult Factor = 7 Jul-10 <, 5 2.5 Max. Value 8 Aug-10 5 5 Max. Pred Cw 9 Sep-10 <' 5 2.5 10 Oct-10 < 5 2.5 11 Nov-10 < 5 2.5 12 Dec-10 3.5 3.5 13 Jan-11 <; 5 2.5 14 Feb-11 <• 5 2.5 15 Mar-11 <' 5 2.5 16 Apr-11 < 5 2.5 17 May-11 < 5 2.5 18 Jun-11 <' 5 2.5 19 Jul-11 <' 5 2.5 20 Aug-11 <, 5 2.5 21 Sep-11 < 5 2.5 22 Oct-11 5 2.5 23 Nov-11 4 4 24 Dec-11 < 5 2.5 25 Jan-12 < 5 2.5 26 Feb-12 < 5 2.5 27 Mar-12 < 5 2.5 28 SPECIAL - Values" WITH "COPY" 0.5743 2.6652 0.2139 27 Mercury 1.32 5.0 ug/L 6.6 ug/L Date Data BDL=1/2DL Results 1 3/1/2008 < 200 100 Std Dev. 118.5673 2 8/1/2008 <1 200 100 Mean 68.5056 3 12/1/2008 I 0.00 ERR C.V. 1.7308 4 3/1/2009 0.00 ERR n 16 5 6/1/2009 < 0.20 0.25 6 12/1/2009 0.01 ERR Mult Factor= 7 7/1/2010 0.05 ERR Max. Value 8 12/15/2010 16.00 16 Max. Pred Cw 9 12J22/2010 366.00 366 10 3/1/2011 14.00 14 11 6/1/2011 0.01 ERR 12 10/1/2011 17.00 17 13 12/1/2011 0.08 ERR 14 3/1/2012 0.00 ERR 15 8/2/2012 2.00 2 16 9/27/2012 1.30 1.3 17 18 19 20 21 22 23 24 25 26 27 28 SPECIAL - Values" WITH "COPY" 6.98 366.0 ng/L 2554.7 ng/L -4- RPA 21873 2.5 MGD 2012, data 6/14/2013 REASONABLE POTENTIAL ANALYSIS Molybdenum Date Data BDL=1/2DL Results 1 Jan-10 Std Dev. 2 Feb-10 Mean 3 Mar-10 < 10 5 C.V. (default) 4 Apr-10 5 May-10 6 Jun-10 Mult Factor = 7 Jul-10 < 10 5 Max. Value 8 Aug-10 Max. Pred Cw 9 Sep-10 ;;<, 10 5 10 Oct-10 11 Nov-10 12 Dec-10 < 10 5 13 Jan-11 14 Feb-11 15 Mar-11 < 10 5 16 Apr-11 17 May-11 18 Jun-11 .< 10 5 19 Jul-11 20 Aug-11 21 Sep-11 22 Oct-11 <. 10 5 23 Nov-11 24 Dec-11 5 2.5 25 Jan-12 26 Feb-12 27 Mar-12 10 5 28 SPECIAL - Values" WITH "COPY" 0.8333 4.7222 0.6000 9 3.16 5.0 ug/L 15.8 ug/L Nickel 4 2 Feb-10 3 Mar-10 1 Jan-10 Std Dev. Apr-10 Date i:at: 10 BDL=1/2DL Results 5 C.V. (default) Mean n 5 May-10 6 Jun-10 ", . Mult Factor = 3.16 5.0 uglL 8 Aug-10 Max. Pred Cw 15.8 ug/L 7 Jul-10 .5, 10 5 Max. Value 9 Sep-10 - 10.0 5 10 Oct-10 11 Nov-10 12 Dec-10 <. 10 5 13 Jan-11 14 Feb-11 15 Mar-11 < 10 5 16 Apr-11 17 May-11 18 Jun-11 10 5 19 Jul-11 20 Aug-11 21 Sep-11 22 Oct-11 . < 10 5 23 Nov-11 24 Dec-11 .,< 10 5 25 Jan-12 26 Feb-12 27 Mar-12 <, 10 5 , • , 28 SPECIAL - Values" WITH "COPY" 0.0000 5.0000 0.6000 9 RPA 21873 2.5 MGD 2012, data -5- 6/14/2013 REASONABLE POTENTIAL ANALYSIS Selenium 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Date Jan-10 Feb-10 Mar-10 Apr-10 May-10 Jun-10 Jul-10 Aug-10 Sep-10 Oct-10 Nov-10 Dec-10 Jan-11 Feb-11 Mar-11 Apr-11 May-11 Jun-11 Jul-11 Aug-11 Sep-11 Oct-11 Nov-11 Dec-11 Jan-12 Feb-12 Mar-12 Apr-12 Data r'c> BDL=II2DL Results 10 5 Std Dev. 10 5 Mean 10 5 C.V. 10 5 n 10 5 10 5 Mult Factor = 10 5 Max. Value 10 5 Max. Pred Cw 10 5 10 5 10 5 10 5 10 5 10 5 10 5 10 5 10 5 10 5 10 5 10 5 10 5 10 5 10 5 10 5 10 5 10 5 10 5 10 5 SPECIAL - Values" WITH "COPY" Silver (AL) 0.0000 5.0000 0.0000 28 1.00 5.0 ug/L 5.0 ug/L 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Date Data BDL=1/2DL Results Jan-10 < 5 2.5 Std Dev. 0.3257 Feb-10 < 5 2.5 Mean 2.2926 Mar-10 1.8 1.8 C.V. 0.1421 Apr-10 < 5 2.5 n 27 May-10 <' 5 2.5 Jun-10 <'- 5 2.5 Mult Factor = Jul-10 1.8 1.8 Max. Value Aug-10 <- 5 2.5 Max. Pred Cw Sep-10 1.8 1.8 Oct-10 <: 5 2.5 Nov-10 <! 5 2.5 Dec-10 1.8 1.8 Jan-11 c 5 2.5 Feb-11 < 5 2.5 Mar-11 1.8 1.8 Apr-11 <1 5 2.5 May-11 < 5 2.5 Jun-11 1.8 1.8 Jul-11 < 5 2.5 Aug-11 < 5 2.5 Sep-11 <? 5 2.5 Oct-11 1.8 1.8 Nov-11 < 5 2.5 Dec-11 <. 5 2.5 Jan-12 < 5 2.5 Feb-12 <> 5 2.5 Mar-12 1.8 1.8 SPECIAL - Values" WITH "COPY" 1.21 2.500 ug/L 3.025 ug/L -6- RPA 21873 2.5 MGD 2012, data 6/14/2013 REASONABLE POTENTIAL ANALYSIS Zinc (AL) Date Data BDL=112DL Results 1 Jan-10 35.5 35.5 Std Dev. 33.7004 2 Feb-10 44.5 44.5 Mean 72.6407 3 Mar-10 36.7 36.7 C.V. 0.4639 4 Apr-10 25.5 25.5 n 27 5 May-10 22.0 22 6 Jun-10 25.5 25.5 Mult Factor = 7 Jul-10 69.7 69.7 Max. Value 8 Aug-10 54.0 54 Max. Pred Cw 9 Sep-10 78.0 78 10 Oct-10 75.0 75 11 Nov-10 60.5 60.5 12 Dec-10 69.3 69.3 13 Jan-11 95.0 95 14 Feb-11 76.0 76 15 Mar-11 60.3 60.3 16 Apr-11 45.0 45 17 May-11 63.0 63 18 Jun-11 158.3 158.3 19 Jul-11 111.0 111 20 Aug-11 132.0 132 21 Sep-11 112.5 112.5 22 Oct-11 98.0 98 23 Nov-11 103.5 103.5 24 Dec-11 75.5 75.5 25 Jan-12 63.5 63.5 26 Feb-12 108.5 108.5 27 Mar-12 63.0 63 28 SPECIAL. Values" WITH "COPY" 1.79 158.3 ug/L 283.4 ug/L RPA 21873 2.5 MGD 2012, data - 7 - 6/14/2013 Mayodan WWTP NC0021873 Qw (MGD) = 2.50 1Q1OS(cfs)= 61.34 7Q1OS (cfs) = 75.00 7Q 10W (cfs) = 131.00 30Q2 (cfs) = 152.00 Avg. Stream Flow, QA (cfs) = 362.00 Receiving Stream: Mayo River REASONABLE POTENTIAL ANALYSIS WWTP/WTP Class: Ill IWC @ 1Q1OS = 5.94% IWC @ 7Q1OS = 4.91% IWC @7Q1OW= 2.87% IWC @ 30Q2 = 2.49% IWC@QA= 1.06% Stream Class: C Outfall 001 Qw=2.5MGD PARAMETER TYPE (1) STANDARDS & CRITERIA (2) —i a co i_ z REASONABLE POTENTIAL RESULTS RECOMMENDED ACTION NC WQS / Applied '/ FAV / Chronic Standard Acute n# Det. Max Pred Allowable Cw Cw Arsenic Arsenic C C 50 FW(7Q10s) 10 HH/WS(Qavg) ug/L ug/L 9 0 Note: n < 9 Limited data set 9 0 Note: n <_ 9 7.9 Default C.V. 7.9 Default C.V. Acute: NO WQS _ _ _ _ _ _ _ _ _ Chronic: 1,018.3 No o value > Allowable Cw Chronic 943.4 No value > Allowable Cw _ _ _ _ _ _ _ _ _ _ _ No- RP, Predicted Max < 50% of Allowable Cw - No Monitoring required No RP, Predicted Max < 50% of Allowable Cw - No Monitoring required Cadmium NC 2 FW(7Q10s) 15 ug/L 10 1 12.3 Acute: 252.5 Chronic: 40.7 No value > Allowable Cw No RP, Predicted Max < 50% of Allowable Cw - No Monitoring required No RP, Predicted Max < 50% of Allowable Cw - No Monitoring required Chromlum NC 50 FW(7Q10s) 1022 ug/L 10 1 886.0 Acute: 17,205.4 - _____- Chronic: 1,018.3 No value > Allowable Cw No RP, Predicted Max < 50% of Allowable Cw - No Monitoring required --- ___ No RP„ Predicted Max a 50% of Allowable Cw - apply Quarterly Monitoring Copper (AL) NC 7 FW(7Q10s) 7 ug/L 27 25 107 Acute: 122.9 Chronic: 142.6 No value > Allowable Cw No RP , Predicted Max a 50% of Allowable Cw - apply Quarterly Monitoring No RP , Predicted Max a 50% of Allowable Cw - apply Quarterly Monitoring Cyanide NC 5 FW(7Q10s) 22 10 ug/L 9 1 Note: n S 9 Limited data set 15.8 Default C.V. Acute: 370.4 _ Chronic: 101.8 No value > Allowable Cw No RP, Predicted Max < 50% of Allowable Cw - No Monitoring required No RP, Predicted Max < 50% of Allowable Cw - No Monitoring required Lead NC 25 FW(7Q10s) 33.8 ug/L 27 3 6.6 Acute: 569.0 - _- _______ -- Chronic: 509.2 No value > Allowable Cw No RP, Predicted Max < 50% of Allowable Cw- No Monitoring required -- - No RP, Predicted Max < 50% of Allowable Cw - No Monitoring required Mercury NC 12 FW(7Q10s) 0.5 ng/L 16 13 2,554.7 Acute: NO WQS Chronic: 244.4 1 value(s) > Allowable Cw RP, See Mercury: TMDL Evaluation 2.5. MGD ,Monitor Quarterly. Molybdenum NC 2000 HH(7Q 10s) ug/L 9 0 Note: n <_ 9 Limited data set 15.8 Default C.V. Acute: NO WQS _ _ _ _ _ _ _ _ _ Chronic: 40,733.2 No value > Allowable Cw _ _ _ _ _ _ _ _ _ _ No RP, Predicted Max < 50% of Allowable Cw- No Monitoring required Nickel NC 88 FW(7Q10s) 261 ug/L 9 0 Note: n S 9 Limited data set 15.8 Default C.V. Acute: 4,393.9 Chronic: 1,792.3 No value > Allowable Cw No RP, Predicted Max < 50% of Allowable Cw - No Monitoring required No RP, Predicted Max < 50% of Allowable Cw- - No Monitoring required Page 1 of 2 RPA 21873 2.5 MGD 2012, rpa 6/14/2013 Mayodan WWTP NC0021873 REASONABLE POTENTIAL ANALYSIS Outfall 001 Qw=2.5MGD Selenium NC 5 FW(7Q10s) 56 ug/L 28 0 5.0 Acute: 942.8 _ _ _ _ _ _ _ _ _ Chronic: 101.8 No value > Allowable Cw No RP, Predicted Max < 50% of Allowable 'Cw- No Monitoring required _ - No RP, Predicted Max < 50% of Allowable Cw- No Monitoring required Silver (AL) NC 0.06 FW(7Q 10s) 1.23 ug/L 27 8 3.025 Acute: 20.7 _ _ _ _ _ _ _ _ _ _ _ _ _ _ Chronic: 1.2 27 value(s) > Allowable Cw No RP, Predicted Max <50% of Allowable Cw = No Monitoring required _ RP for AL(Cu,Zn,Ag,Fe,CI) - apply Quarterly Monitoring in conjunction with TOX Test Zinc (AL) NC 50 FW(7Q10s) 67 ug/L 27 27 283.4 Acute: 1,127.9 _ _ _ _ _ - _ _ _ - Chronic: 1,018.3 No value > Allowable Cw No RP, Predicted Max < 50% of Allowable Cw - No Monitoring required - _ _ _ - No RP, Predicted Max 50% of Allowable Cw - No Monitoring required Page 2 of 2 RPA 21873 2.5 MGD 2012, rpa 6/14/20; 3 Mayodan WWTP NC0021873 Qw (MGD) = 3.00 1 Q I OS (cfs) = 61.34 7Q 1 OS (cfs) = 75.00 7Q 1 OW (cfs) = 131.00 30Q2 (cfs) = 152.00 Avg. Stream Flow, QA (cfs) = 362.00 Receiving Stream: Mayo River REASONABLE POTENTIAL ANALYSIS WWTP/WTP Class: IV IWC @ 1Q1OS = 7.05% IWC (a3 7Q10S = 5.84% IWC cQ 7Q1OW = 3.43% IWC ® 30Q2 = 2.97% IWC@QA= 1.27% Stream Class: C Outfall 0'01 • Qw=3MGD CHRONIC TEST CONCENTRATION = 5.8% PARAMETER TYPE (1) STANDARDS & CRITERIA (2) a I._ Z REASONABLE POTENTIAL RESULTS RECOMMENDED ACTION NC WQS / Applied �/2 FAV / Chronic Standard Acute n # Det. Max Pred Allowable Cw Cw Arsenic Arsenic C C 50 FW(7QIOs) 10 HI I/WS(Qavg) ug/L ug/L 9 0 Note: n < 9 Limited data set 9 0 Note: n < 9 7.9 Default C.V. 7.9 Default C.V. Acute: NO WQS _ __ ______ _ __ Chronic: 856.2 No o value > Allowable Cw Chronic 87.7_4 No value > Allowable Cw _ _________ ____ _________. No RP, Predlcted Max < 50% of Allowable Cw - No Monitoring required No RP, Predicted Max < 50°% of Allowable Cw - No Monitoring required Cadmium NC 2 FW(7Q10s) 15 ug/L 10 1 12.3 Acute: 212.8 __Ch_r_n_c__-_-3___- No value > Allowable Cw No RP, Predicted Max < 50% of Allowable Cw - No Monitoring required NoRP,PredictedMa_x_50_%_o_f Al_lowa_ble_ Cw .N_ Monitoring required Chromium NC 50 FW(7Q10s) 1022 ug/L 10 1 886.0 Acute: 14,496.5 Chronic: 856.2 No value > Allowable Cw No RP, Predicted Max < 50% of Allowable Cw - No Monitoring required RP for non -AL - apply Monthly Monitoring with Limit Copper (AL) NC 7 FW(7Q10s) 7 ug/L 27 25 107 Acute: 103.5 _ _ _ _ - _ _ _ _ - Chronic: 119.9 No value > Allowable Cw RP for AL(Cu,Zn,Ag,Fe,CI) - apply Quarterly Monitoring in conjunction with TOX Test _ No RP , Predicted Max a 50% of Allowable Cw - apply, Quarterly Monitoring Cyanide NC 5 FW(7Q10s) 22 10 ug/L 9 1 Note: n < 9 Limited data set 15.8 Default C.V. Acute: 312.1 _ _ _ _ _ - _ _ _ _ _ _ Chronic: 85.6 No value > Allowable Cw No RP, Predicted Max < 50% of Allowable Cw - No Monitoring required _ . _ _ _ _ _ _ No RP, Predicted Max < 50% of Allowable Cw - No Monitoring required Lead NC 25 FW(7Q10s) 33.8 ug/L 27 3 6.6 Acute: 479.4 _ _ _ _ _ _ _ _ _ _ _ Chronic: 428.1 No value > Allowable Cw No RP, Predicted Max < 50% of Allowable Cw - No Monitoring required No RP Predicted' Max < 50% of Allowable Cw - No Monitoring required Mercury NC 12 FW(7Q10s) 0.5 ng/L 16 13 2,554.7 Acute: NO WQS _ _- -_____ _ __ Chronic: 205.5 l value(s) > Allowable Cw .. _ _. RP, See Mercury.TMDLEvaluation 3.0 MGD, Monitor Quarterly. Molybdenum NC 2000 HH(7Q10s) ug/L 9 0 Note: n _< 9 Limited data set 15.8 Default C.V. Acute: NO WQS _ _ _ _ _ _ _ _ _ _ _ _ Chronic: 34,246.6 No value > Allowable Cw _ _ _ _ _ _ _ _ _ _ No RP, Predicted Max < 50% of Allowable Cw - No Monitoring required Nickel NC 88 FW(7Q10s) 261 ug/L 9 0 Note: n < 9 Limited data set 15.8 Default C.V. Acute: 3,702.1 _ _ _ _ _ _ _ _ _ - Chronic: 1,506.8 No value > Allowable Cw No RP, Predicted Max < 50% of Allowable Cw - No Monitoring required_ No RP, Predicted Max < 50% of Allowable Cw - No Monitoring required Page 1 of 2 RPA 21873 3.0 MGD 2012, rpa 6/14/2013 Mayodan WWTP NC0021873 REASONABLE POTENTIAL ANALYSIS Outfall 001 Qw=3MGD Selenium NC 5 FW(7Q10s) 56 ug/L 28 0 5.0 Acute: 794.3 Chronic: 85.6 No value > Allowable Cw No RP, Predicted Max < 50% of Allowable Cw - No Monitoring required No RP, Predicted Max < 50% of Allowable Cw - No Monitoring required Silver (AL) NC 0.06 FW(7Q 10s) 1.23 ug/L 27 8 3.025 Acute: 17.4 Chronic: 1.0 27 value(s) > Allowable Cw No RP, Predicted Max < 50% of Allowable Cw - No Monitoring required RP for AL(Cu,ZnAg,Fe,CO) - apply Quarterly Monitoring In conjunction with TOX Test Zinc (AL) NC 50 FW(7Q10s) 67 ug/L 27 27 283.4 Acute: 950.4 - _- -_-_-_ _ _- Chronic: 856.2 No value > Allowable Cw No RP, Predicted Max < 50% of Allowable Cw - No Monitoring required _-_---------—• No RP, Predicted Max < 50% of Allowable Cw - No Monitoring required Page 2 of 2 RPA 21873 3.0 MGD 2012, rpa 6/14/20r13 Mayodan WWTP NC0021873 Qw (MGD) = 4.50 1 Q 1 OS (cfs) = 61.34 7Q 10S (cfs) = 75.00 7Q10W (cfs) = 131.00 30Q2 (cfs) = 152.00 Avg. Stream Flow, QA (cfs) = 362.00 Receiving Stream: Mayo River REASONABLE POTENTIAL ANALYSIS WWTP/WTP Class: IV IWC @ 1Q1OS = 10.21% IWC @7Q10S= 8.51% IWC ® 7Q1OW = 5.06% IWC @ 30Q2 = 4.39% IWC QA 1.89% Stream Class: C Outfall 001 Qw=4.5MGD CHRONIC TEST CONCENTRATION = PARAMETER TYPE (1) STANDARDS & CRITERIA (2) g E co t- zMax REASONABLE POTENTIAL RESULTS . RECOMMENDED ACTION NC WQS / Chronic Applied Standard 1/2FAV / Acute Pred n # Det. Cw Allowable Cw Arsenic Arsenic C C 50 10 FW(7Q10s) HH/WS(Qavg) ug/L ug/L 9 0 Note: n < 9 Limited data set 9 0 Note: n < 9 7.9 Default C.V. 7.9 Default C.V. Acute: NO WQS _ _________ _ __ Chronic:_____ No value > All_owa_ble Cw_ _ Chronic: 529._1 No value > Allowable Cw _ _ _ _ _ _ _-_ _ No RP, Predicted Max < 50% of Allowable Cw - No Monitorin&required _ _ _ _ _ _ _ _ _ C_ _ RP No , Predicted Max < 50% of Allowable w - No Monitoring required Cadmlum NC 2 FW(7Q10s) 15 ug/L 10 1 12.3 Acute: 146.9 _ _ _ _ _ _ _ _ _ _ _ _ Chronic_ 23.5 No value > Allowable Cw No RP, Predicted Max < 50% of Allowable Cw - _No_Monitorin&re fired _ _ _ _ _ - _ _ _ - _ _ _ No RP , Predicted Max >_ 50% of Allowable Cw . apply Quarterly Monitoring Chromlum NC 50 FW(7Q10s) 1022 ug/L 10 1 886.0 Acute: 10,009.8 _ __ ____-_ _ _ Chronic: 587.5 No value > Allowable Cw No RP, Predicted Max < 50% of Allowable Cw - No_Monitorin$reguired _ __-___-_-___ RP for non -AL - apply Monthly Monitoring with Limit Copper (AL) NC 7 FW(7Q10s) 7 ug/L 27 25 107 Acute: 71.5 _ _ _ _ _ _ _ _ _ _ _ _ Chronic: 82.3 No value > Allowable Cw RP for AL(Cu,Zn,Ag,Fe,CI) - apply Quarterly Monitorin& n conjunction with TOX Test _ _ RP for AL(Cu,Zn,Ag,Fe,CI) - apply' Quarterly Monitoring in conjunction with TOX Test Cyanlde NC 5 FW(7Q10s) 22 10 ug/L 9 1 Note: n <_ 9 Limited data set 15.8 Default C.V. Acute: 215.5 _ _ _ _ _ _ _ _ _ _ _ _ _ _ Chronic: 58.8 No value > Allowable Cw No RP, Predicted Max < 50% of Allowable Cw - _No Monitorin&required _ _ _ . No RP, Predicted Max < 50% of Allowable Cw - No Monitoring required Lead NC 25 FW(7Q10s) 33.8 ug/L 27 3 6.6 Acute: 331.0 _ _ _ _ _ _ _ _ _ _ _ _ _ Chronic: 293.8 No value > Allowable Cw No RP, Predicted Max < 50% of Allowable Cw - No Monitoringrequired _ ^ _ , _ _ _ _ No RP, Predicted Max < 50%0 of Allowable Cw - No Monitoring rewired Mercury NC 12 FW(7Q10s) 0.5 ng/L 16 13 2,554.7 Acute: NO WQS _ _ _ _ _ _ _ _ _ Chronic: 141.0 I value(s) > Allowable Cw S_ _' _ _ _ —Ricee MercuryTMDL Evaluation 4.5 MGD, Monitor Quarterly. Molybdenum NC 2000 HH(7Q10s) ug/L 9 0 Note: n < 9 Limited data set 15.8 Default C.V. Acute: NO WQS _ _ _ _ _ _ _ _ _ _ _ _ Chronic: 23,501 8 No value > Allowable Cw _ _ _ _ _ _ _ _ _ No RP, Predicted Max < 50% of Allowable Cw - No Monitoring required Nickel NC 88 FW(7Ql0s) 261 ug/L 9 0 Note: n < 9 Limited data set 15.8 Dcfault C.V. Acute: 2,556.3 _ ___ _____ _ __ Chronic: 1,034.1 No value > Allowable Cw No RP, Predicted Max < 50% o of Allowable Cw - _NoMonitorin&required___________-_ Kai., Predicted Max <50% of Allowable Cw - No Monitoring required Page 1 of 2 RPA 21873 4.5 MGD 2012, rpa 6/14/2013 Mayodan WWTP NC0021873 REASONABLE POTENTIAL ANALYSIS Outfall 001 Qw = 4.5 MGD Selenium NC 5 FW(7Q10s) 56 ug/L 28 0 5.0 Acute: 548.5 _ _ _ _ Chronic: 58.8 No value > Allowable Cw No RP, Predicted Max < 50% of Allowable Cw - _No_Monitorin uired _ _ _ No RP, Predicted Max < 50% of Allowable Cw - No Monitoring required Sllver (AL) NC 0.06 FW(7Q10s) 1.23 ug/L 27 8 3.025 Acute: 12.0 _ _ _ _ _ — _ — _ _ _ _ — _ Chronic: 0.7 27 value(s) > Allowable Cw No RP, Predicted Max < 50% of Allowable Cw - No Monitorin�reguired _ _ — _ — _ _ _ _ _ _ — - RP for AL(Cu,Zn,Ag,Fe,CI) - apply Quarterly Monitoring in conjunction with TOX Test Zlnc(AL) NC 50 FW(7Q10s) 67 ug/L 27 27 283.4 Acute: 656.2 Chronic: 587.5 No value > Allowable Cw No RP, Predicted Max < 50% of Allowable Cw - NoMonitorin$reguired _ _ _ _ — _ — - No RP, Predicted Max < 50% of Allowable Cw - No Monitoring required Page 2 of 2 RPA 21873 4.5 MGD 2012, rpa 6/14/20.13 6/14/13 WQS = 12 ng/L MERCURY WQBEL/TBEL EVALUATION V:2012-4 Facility Name: Mayodan WWTP @ 2.5 MGD Annual Limit 47 ng/L with Quarterly Monitoring Total Mercury 1631E PQL = 0.5 ng/L 7Q10s = 61.340 cfs WQBEL = 201.96 ng/L Date Modifier Data Entry Value Permitted Flow = 2.500 MGD TBEL = 47 ng/L Mar-08 Aug-08 Dec-08 Mar-09 Jun-09 Dec-09 Jul-10 Dec-10 Dec-10 Mar-11 Jun-11 Oct-11 Dec-11 Mar-12 Aug-12 Sep-12 < 200 < 200 0.01 1.80 < 0.20 0.01 0.05 16.00 366.00 14.00 0.01 17.00 0.08 0.00 2.00 1.30 100 100 0.5 1.8 0.5 0.5 0.5 16 366 14 0.5 17 0.5 0 2 1.3 > TBEL > TBEL > TBEL 66.8 ng/L - Annual Average for 2008 0.9 ng/L - Annual Average for 2009 127.5 ng/L - Annual Average for 2010 8.0 ng/L - Annual Average for 2011 1.1 ng/L - Annual Average for 2012 6/14/13 WQS = 12 ng/L MERCURY WQBEL/TBEL EVALUATION V:2012-4 Facility Name: Mayodan WWTP @ 3.0 MGD Annual Limit 47 ng/L with Quarterly Monitoring Total Mercury 1631E PQL = 0.5 ng/L 7Q10s = 61.340 cfs WQBEL = 170.30 ng/L Date Modifier Data Entry Value Permitted Flow = 3.000 MGD TBEL = 47 ng/L Mar-08 Aug-08 Dec-08 Mar-09 Jun-09 Dec-09 Jul-10 Dec-10 Dec-10 Mar-11 Jun-11 Oct-11 Dec-11 Mar-12 Aug-12 Sep-12 < 200 100 < 200 100 0.01 0.5 1.80 1.8 < 0.20 0.5 0.01 0.5 0.05 0.5 16.00 16 366.00 366 14.00 14 0.01 0.5 17.00 17 0.08 0.5 0.00 0 2.00 2 1.30 1.3 > TBEL > TBEL > TBEL 66.8 ng/L - Annual Average for 2008 0.9 ng/L - Annual Average for 2009 127.5 ng/L - Annual Average for 2010 8.0 ng/L - Annual Average for 2011 1.1 ng/L - Annual Average for 2012 6/14/13 WQS = 12 ng/L MERCURY WQBEL/TBEL EVALUATION V:2012-4 Facility Name: Mayodan WWTP @ 4.5 MGD Annual Limit 47 ng/L with Quarterly Monitoring Total Mercury 1631E PQL = 0.5 ng/L 7Q10s = 61.340 cfs WQBEL = 117.53 ng/L Date Modifier Data Entry Value Permitted Flow = 4.500 MGD TBEL = 47 ng/L Mar-08 Aug-08 Dec-08 Mar-09 Jun-09 Dec-09 Jul-10 Dec-10 Dec-10 Mar-11 Jun-11 Oct-11 Dec-11 Mar-12 Aug-12 Sep-12 200 100 200 100 0.01 0.5 1.80 1.8 0.20 0.5 0.01 0.5 0.05 0.5 16.00 16 366.00 366 14.00 14 0.01 0.5 17.00 17 0.08 0.5 0.00 0 2.00 2 1.30 1.3 > TBEL > TBEL 66.8 ng/L - Annual Average for 2008 0.9 ng/L - Annual Average for 2009 > TBEL WQBEL< 127.5 ng/L - Annual Average for 2010 8.0 ng/L - Annual Average for 2011 1.1 ng/L - Annual Average for 2012 NEapis7, kayo la^ �.•��✓ i P NPDES Permitting for Mercury Implementation of 2012 Statewide Mercury TMDL Facil ty Type '_ Annual Average ` ;i Linl t Requu ed;(.se ;fit). on itor tg,Ereciuency . (ith17 � nalysis) WO,Required (see B). _ .» Major Muni (>1 MGD) CYes) Quarterly 6Ye if > 2 MGD) No 3 PPA only Yes- if multiple detects above 1 ng/1 and > 2 MGD Minor Muni (<1 MGD) Yes Quarterly No No Once/5 years No Industrial Yes Quarterly Yes No None in permit. Might be required for EPA application form. No A.Procedure to Determine if Annual Average Limit Required: Step 1- WQBEL Evaluation • Evaluate need for Water Quality Based Effluent Limit (WQBEL) • Calculate Allowable mercury concentration using dilution (12 ng/1 x 7Q10 dilution factor) • Compare Annual effluent concentrations to Allowable Conc. for each of last 5 years • If any Annual Avg > Allowable Conc., then add Annual Avg WQBEL. Step 2- TBEL Evaluation • Evaluate need for Technology Based Effluent Limit (TBEL) • Compare all individual values to TBEL of 47 ng/1 • If any single value > 47 ng/1, then add Annual Avg TBEL of 47 ng/1. Step 3- Compare WQBEL to TBEL • If data triggers need for WQBEL and TBEL, select most stringent of the two limits. • If data triggers need for only TBEL, add 47 ng/1 annual average limit unless WQBEL < 47 ng/1, in which case annual avg limit should be set at WQBEL. • Conclusion: the Annual Avg limit will range from 12 ng/1 to upper cap of 47 ng/1. Step 4- If NEW limit, delay effective date • Addition of new limit will become effective in 5th year of permit, with mercury minimization plan development/implementation required for first 4 years (see MMP below). B. Mercury Minimization Plan (MMP). If an MMP is required (note change to Major Municipal > 2MGD), add the following Special Condition to the permit: A(x). Mercury Minimization Plan (MMP). The permittee shall develop and implement a mercury minimization plan during this permit term. The MMP shall be developed within 180 days of the NPDES Permit Effective Date, and shall be available for inspection on -site. A sample MMP was developed through a stakeholder review process and has been placed on the Division website for guidance (http://portal.ncdenr.org/web/wq/swp/ps/npdes, under Model Mercury Minimization Plan). The MMP should place emphasis on identification of mercury contributors and goals for reduction. Results shall be summarized and submitted with the next permit renewal. C. New/Expanding Dischargers- will be allowed as long as the overall aggregate point source load allocation is not exceeded. D. Special Situations- Additional site -specific information, such as fish tissue and water column data when available, will be considered in assigning limits and MMP requirements. Also, limits > TBEL may be considered on case -by -case basis due to extenuating circumstances Version 06/13/2013 Prepared by: Tom Belnick Approved by Jeff Poupart Ne DP 2 1'; 3 -o a•,, D F D la et DWQ Guidance Regarding the Reduction of Monitoring Frequencies in NPDES Permits for Exceptionally Performing Facilities October 22, 2012 A. Purpose In its efforts to reduce the regulatory burden upon permittees while maintaining adequate compliance oversight over point source discharges, DWQ has developed the following guidance for the reduction of monitoring frequencies in NPDES permits for specific target parameters. Standard minimum NPDES monitoring frequencies are established in 15A NCAC 2B .0508 for discharges from facilities with specific Standard Industrial Classification (SIC) categories. However, 2B .0508(b)(1) states: "If it is demonstrated to the satisfaction of the Director that any of the tests and measurements, sampling points, or frequency of sampling requirements, as required in this Rule for a particular SIC group, are not applicable to the discharge of a particular water pollution control facility, or if it can be demonstrated that the objectives of this Section can be achieved by other acceptable means then such requirements may be waived or modified to the extent that the Director determines to be appropriate." This document identifies criteria to be used by DWQ that satisfies the regulatory standard for the allowance of reduced monitoring frequencies for facilities included in SIC 4952. This guidance applies to facilities with outstanding NPDES program compliance histories, exhibiting effluent discharges that are excellent in both quality and consistency. Such performance will demonstrate that compliance for particular parameters can be adequately evaluated with less monitoring. Facilities demonstrating consistent, long-term treatment performance at levels far below effluent limitations (<50%) may be considered for a reduction in monitoring from existing permit frequencies to a 2/week minimum frequency for the parameters BODE, CBOD5 TSS, NH3-N and fecal coliform/enterococci (the "target parameters"). B. Approval Criteria Individual NPDES facilities shall submit a written request to modify their NPDES permit specifying which parameters are to be considered for reduced monitoring . Permit holders must include with their requests sufficient data, statistical analyses, and other information to support the justification for reduced monitoring. NPDES permit staff shall review the application and supporting information. Approval of reduced monitoring frequency shall be granted if all the criteria below are met: • The facility has no more than one civil penalty assessment for permit limit violations for each target parameter during the previous three years. /! o & p a-r. 0 / rL 5 ,2/ 2. / / 2 v/ 1 • Neither the permittee nor any of its employees have been convicted of criminal violations of the Clean Water Act within the previous five years. N on t R A o wm • The facility is not currently under an SOC for target parameter effluent limit noncompliance. AI't 1.'' to / ' Burs A/el/2v/ • The facility is not on EPA's Quarterly Noncompliance Report for target parameter limit violations. AlVol/ / I, • For BODS, CBODS, TSS, NH3-N and TSS, the three year arithmetic mean of effluent data must be less than fifty percent of the onthly average permit limit. For fecal coliform or enterococci, the i3 oPs T s Aet/5 - r' rt c </ ts , artt -)0 p, fr--- 7Per,PA-- 16 01/4" A d® 50Z is i5 $9 too 3 rr/-l9 tc.o) 9. IA 1,1 Fl 3,, s Pot, 1 A P f Pir 01 Fa i/ three year geometric mean must be less than 50 percent of the monthly average permit limit. For parameters with summer and winter limits, an annual arithmetic mean of the seasonal limits may be used in the calculation. • With the exception of fecal coliform or enterococci, no more than 15 daily sampling results over the 3-year review period can be over 200% of the monthly average limit for BOD5, CBOD5, TSS, or NH3-N . Values associated with documented impacts of extreme weather or e)pnts beyond the control of the permittee will not be included. r9opf = o 7-55 = / /r✓N1 %a41 /7 /fj • For fecal coliform or enterococci, no more than 20 daily sampling results may be over 200% of the weekly average limit. Values associated with documented impacts of extreme weather or events beyond the control of the permittee will not be included. Te c / y 3 • For the four target parameters, sampling results shall not show more than two non -monthly average limit violations during the previous year. 1075 = ! NH) - _ ° re5"5 Piss `'a s,5( • Reduced effluent monitoring must not impair assessment of sensitive downstream uses, such as endangered species. C. Implementation Feed Fai After DWQ review and approval, the facility's NPDES permit will be reissued with reduced monitoring frequencies for qualified parameters. Additional NPDES permit requirements will include: • Eligible facilities may be granted a reduction from existing permit monitoring frequencies to a 2/week minimum frequency for the four target parameters. Reductions will be made for both effluent and influent sampling. • Where monitoring is reduced to twice per week, it must occur on any two non-consecutive days during the calendar week (Sunday through Saturday). • Required monitoring frequency reductions establish new permit minimums for monitoring. As always, facilities may monitor more often than required in the permit. • If a reportable event, as defined by the permit [e.g., Part 11 (E) (6 & 9)] occurs, any facility granted reduced monitoring frequencies will be encouraged to monitor on a daily basis until the episode is resolved. Monitoring frequency reduction from the minimum frequencies reductions established by the rules are based upon consistent, exceptional performance. DWQ may revoke on a case -by -case basis these reductions if the facility begins to perform in noncompliance with permit limits. If a facility's monitoring reduction for a specific parameter is removed through permit modification, reconsideration of monitoring frequency reduction will only occur three years following the revocation/permit modification action, or at the next permit renewal. • From: Blackwell, Nadine [Nadine.Blackwell@UnitedWater.com] Sent: Wednesday, February 20, 2013 3:14 PM To: Mckay, James Cc: Whitten, Jamie; Michael Brandt (mbrandt@townofmayodan.com) Subject: RE: Mayodan WWTP Permit Renewal Attachments: 20130220144610462.pdf; DMR Data for Reduced Monitoring.xls Thank you for the information. I am attaching a spread sheet with the Effluent data for BOD, TSS, Ammonia, and Fecal Coliform. As you will note, the 3 year average is less than 50% of the permit limits for BOD, TSS, and Ammonia. I am also attaching graphs of the parameters compared to their limits. The weekly TSS was exceeded 2 times during the period and the weekly Fecal Coliform was exceeded 6 times during the period. Please let me know if Mayodan qualifies for reduced monitoring for any of the parameters or if you require additional information. Thanks. From: Mckay, James [mailto:iames.mckayAncdenr.aov] Sent: Monday, January 28, 2013 2:42 PM To: Blackwell, Nadine Subject: Mayodan WWTP Permit Renewal Ms. Blackwell: This link should take you to the document regarding Monitoring Frequency Reduction. You can press "Ctrl" while clicking on the URL below to go to our NPDES web site, or copy it and paste to your web browser. If you find that the Mayodan plant meets the requirements, you might be able to cut your monitoring frequency from 3/ week to 2/ week on the specific parameters (BOD, TSS, NH3 — N (Summer) and Fecal Coliform) and save approximately 1/3 of the lab costs for these parameters. The permit is still in the public comment phase. If you find that you qualify for a frequency modification, please send me all of the information required, along with any other comments on the draft permit by 30 days of the date the newspaper ad is published and I will make the necessary changes to the permit. http://portal.ncdenr.org/c/document library/get file?uuid=90fdd082-6172-42c0-b4ee- cf3968502019&groupld=38364 Please contact me if I can be of further assistance. Jim McKay, Environmental Engineer NC DENR / Division of Water Quality / Surface Water Protection Section Point Source Branch 1617 Mail Service Center, Raleigh, NC 27699-1617 919/807-6404 (work); 919/807-6489 (fax) **Please note, my email address has changed to James.McKay@ncdenr.gov E-mail correspondence to and from this address may be subject to the North Carolina Public Records law and may be disclosed to third parties. file://E:1NC00218731RE Mayodan WWTP Permit Renewal.htm J A I B I C D E F G H I J 1 TOWN OF MAYODAN WWTP 2 3 4 BOD TSS NH3-N 5 mg/I mg/I mg/I 6 1/5/2010 <2.0 1/5/2010 3.50 1/5/2010 0.30 7 1/6/2010 <2.0 1/6/2010 8.30 1/6/2010 0.67 8 1/7/2010 9.00 1/7/2010 6.90 1/7/2010 0.84 9 1/12/2010 <2.0 1/12/2010 6.60 1/12/2010 0.51 10 1/13/2010 <2.0 1/13/2010 9.70 1/13/2010 0.71 11 1/14/2010 2.20 1/14/2010 9.70 1/14/2010 0.83 12 1/19/2010 6.40 1/19/2010 10.00 1/19/2010 2.04 13 1/20/2010 5.50 1/20/2010 16.00 1/20/2010 1.71 14 1/21/2010 3.00 1/21/2010 3.20 1/21/2010 0.23 15 1/26/2010 33.00 1/26/2010 33.00 1/26/2010 3.18 16 1/27/2010 8.20 1/27/2010 24.00 1/27/2010 2.30 17 1/28/2010 5.80 1/28/2010 7.70 1/28/2010 0.69 18 1/29/2010 7.30 1/29/2010 9.00 1/29/2010 0.59 19 2/2/2010 6.30 2/2/2010 17.00 2/2/2010 0.19 20 2/3/2010 3.50 2/3/2010 2.80 2/3/2010 0.17 21 2/4/2010 16.00 2/4/2010 9.30 2/4/2010 3.47 22 2/9/2010 <2.0 2/9/2010 4.00 2/9/2010 0.85 23 2/10/2010 <2.0 2/10/2010 8.30 2/10/2010 0.22 24 2/11/2010 <2.0 2/11/2010 4.70 2/11/2010 0.43 25 2/16/2010 2.60 2/16/2010 1.90 2/16/2010 0.07 26 2/17/2010 5.20 2/17/2010 18.00 2/17/2010 0.12 27 2/18/2010 4.20 2/18/2010 6.60 2/18/2010 0.17 28 2/23/2010 3.40 2/23/2010 14.00 2/23/2010 0.18 29 2/24/2010 2.30 2/24/2010 6.50 2/24/2010 0.14 30 2/25/2010 2.60 2/25/2010 7.10 2/25/2010 0.08 31 3/2/2010 8.20 3/2/2010 6.30 3/2/2010 0.05 32 3/3/2010 4.30 3/3/2010 7.00 3/3/2010 0.05 33 3/4/2010 2.50 3/4/2010 8.30 3/4/2010 0.05 34 3/9/2010 3.80 3/9/2010 2.30 3/9/2010 0.06 35 3/10/2010 <2.0 3/10/2010 2.00 3/10/2010 0.06 36 3/11/2010 <2.0 3/11/2010 10.00 3/11/2010 0.23 37 3/16/2010 5.20 3/16/2010 7.80 3/16/2010 1.02 38 3/17/2010 2.10 3/17/2010 4.50 - 3/17/2010 0.04 39 3/18/2010 2.40 3/18/2010 2.80 3/18/2010 0.09 40 3/23/2010 <2.0 3/23/2010 3.60 3/23/2010 0.38 41 3/24/2010 4.70 3/24/2010 4.00 3/24/2010 0.28 42 3/25/2010 2.10 3/25/2010 6.40 3/25/2010 0.70 43 3/30/2010 11.00 3/30/2010 13.00 3/30/2010 3.48 44 3/31/2010 5.80 3/31/2010 6.70 3/31/2010 1.85 45 4/1/2010 13.00 4/1/2010 4.90 4/1/2010 1.71 46 4/6/2010 2.00 4/6/2010 4.90 4/6/2010 3.31 47 4/7/2010 2.40 4/7/2010 3.80 4/7/2010 3.51 48 4/8/2010 2.90 4/8/2010 4.80 4/8/2010 3.60 49 4/13/2010 5.10 4/13/2010 7.00 4/13/2010 3.58 50 4/14/2010 4.50 4/14/2010 5.40 4/14/2010 3.42 51 4/15/2010 6.90 4/15/2010 8.00 4/15/2010 3.38 52 4/20/2010 2.00 4/20/2010 5.70 4/20/2010 1.67 53 4/21/2010 4.40 4/21/2010 5.30 4/21/2010 1.53 54 4/22/2010 2.40 4/22/2010 8.70 4/22/2010 2.24 55 4/27/2010 17.00 4/27/2010 31.00 4/27/2010 5.44 56 4/28/2010 18.00 4/28/2010 23.00 4/28/2010 12.64 57 4/29/2010 15.00 4/29/2010 15.00 4/29/2010 12.48 58 5/4/2010 13.00 5/4/2010 23.00 5/4/2010 14.68 59 5/5/2010 16.00 5/5/2010 21.00 5/5/2010 19.30 60 5/6/2010 18.00 5/6/2010 25.00 5/6/2010 18.40 I A B C D E F G H .I J R 61 5/11/2010 17.00 5/11/2010 10.00 5/11/2010 15.76 62 5/12/2010 13.00 5/12/2010 13.00 5/12/2010 12.48 63 5/13/2010 6.10 5/13/2010 6.30 5/13/2010 9.84 64 5/18/2010 33.00 5/18/2010 24.00 5/18/2010 16.12 65 5/19/2010 16.00 5/19/2010 16.00 5/19/2010 12.56 66 5/20/2010 15.00 5/20/2010 8.70 5/20/2010 12.30 67 5/25/2010 13.00 5/25/2010 3.30 5/25/2010 12.92 68 5/26/2010 12.00 5/26/2010 9.10 5/26/2010 14.20 69 5/27/2010 13.00 5/27/2010 8.30 5/27/2010 13.60 70 6/1/2010 19.00 6/1/2010 21.00 6/1/2010 18.72 71 6/2/2010 22.00 6/2/2010 22.00 6/2/2010 21.08 72 6/3/2010 43.00 6/3/2010 16.00 6/3/2010 21.56 73 6/8/2010 26.00 6/8/2010 24.00 6/8/2010 22.60 74 6/9/2010 27.00 6/9/2010 37.00 6/9/2010 22.50 75 6/10/2010 19.00 6/10/2010 22.00 6/10/2010 23.20 76 6/15/2010 16.00 6/15/2010 7.50 6/11/2010 18.90 77 6/16/2010 5.10 6/16/2010 4.60 6/12/2010 20.30 78 6/17/2010 4.60 6/17/2010 2.30 6/13/2010 21.60 79 6/22/2010 4.30 6/22/2010 6.40 6/14/2010 24.10 80 6/23/2010 2.30 6/23/2010 1.30 6/15/2010 12.28 81 6/24/2010 2.80 6/24/2010 1.80 6/16/2010 6.52 82 6/29/2010 4.70 6/29/2010 8.60 6/17/2010 1.95 83 6/30/2010 2.20 6/30/2010 2.20 6/18/2010 1.00 84 7/1/2010 3.40 7/1/2010 5.10 6/19/2010 1.43 85 7/6/2010 2.20 7/6/2010 1.70 6/20/2010 0.65 86 7/7/2010 <2.0 7/7/2010 2.30 6/21/2010 1.44 87 7/8/2010 4.10 7/8/2010 13.00 6/22/2010 6.40 88 7/13/2010 <2.0 7/13/2010 1.00 6/23/2010 0.46 89 7/14/2010 5.90 7/14/2010 6.50 6/24/2010 0.28 90 7/15/2010 4.00 7/15/2010 3.80 6/25/2010 4.08 91 7/20/2010 2.70 7/20/2010 1.00 6/26/2010 4.13 92 7/21/2010 2.20 7/21/2010 2.00 6/27/2010 4.50 93 7/22/2010 2.80 7/22/2010 3.00 6/29/2010 0.84 94 7/27/2010 3.80 7/27/2010 5.00 6/30/2010 1.21 95 7/28/2010 3.00 7/28/2010 5.70 7/1/2010 1.24 96 7/29/2010 2.20 7/29/2010 4.70 7/6/2010 0.16 97 8/3/2010 <2.0 8/3/2010 2.50 7/7/2010 0.22 98 8/4/2010 2.60 8/4/2010 6.80 7/8/2010 0.23 99 8/5/2010 2.80 8/5/2010 3.00 7/13/2010 0.11 100 8/10/2010 <2.0 8/10/2010 4.00 7/14/2010 0.21 101 8/11/2010 2.30 8/11/2010 4.70 7/15/2010 0.39 102 8/12/2010 5.40 8/12/2010 3.00 7/20/2010 0.21 103 8/17/2010 2.40 8/17/2010 3.80 7/21/2010 0.21 104 8/18/2010 <2.0 8/18/2010 2.30 7/22/2010 0.12 105 8/19/2010 2.80 8/19/2010 3.80 7/27/2010 0.39 106 8/24/2010 2.30 8/24/2010 4.40 7/28/2010 0.10 107 8/25/2010 2.10 8/25/2010 5.30 7/29/2010 0.09 108 8/26/2010 2.40 8/26/2010 3.30 8/3/2010 0.30 109 8/31/2010 <2.0 8/31/2010 3.00 8/4/2010 0.10 110 9/1/2010 <2.0 9/1/2010 <4.2 8/5/2010 0.08 111 9/2/2010 <2.0 9/2/2010 7.00 8/10/2010 0.11 112 9/7/2010 <2.0 9/7/2010 <2.8 8/11/2010 0.18 113 9/8/2010 <2.0 9/8/2010 5.30 8/12/2010 0.13 114 9/9/2010 2.90 9/9/2010 8.20 8/17/2010 0.29 115 9/14/2010 <2.0 9/14/2010 3.20 8/18/2010 0.08 116 9/15/2010 <2.0 9/15/2010 2.80 8/19/2010 0.08 117 9/16/2010 <2.0 9/16/2010 4.60 8/24/2010 0.29 118 9/21/2010 <2.0 9/21/2010 <2.6 8/25/2010 1.05 119 9/22/2010 <2.0 9/22/2010 <2.8 8/26/2010 0.18 120 9/23/2010 <2.0 9/23/2010 <2.6 8/31/2010 0.08 A B C D E F G H I I J 121 9/28/2010 <2.0 9/28/2010 2.80 9/1/2010 0.14 122 9/29/2010 2.80 9/29/2010 4.30 9/2/2010 0.10 123 9/30/2010 3.20 9/30/2010 6.40 9/7/2010 0.10 124 • 10/5/2010 <2.0 10/5/2010 3.60 9/8/2010 0.17 125 10/6/2010 <2.0 10/6/2010 <2.8 9/9/2010 1.50 126 10/7/2010 2.20 10/7/2010 4.40 9/14/2010 0.15 127 10/12/2010 <2.0 10/12/2010 3.30 9/15/2010 1.57 128 ' 10/13/2010 <2.0 10/13/2010 <2.7 9/16/2010 2.17 129 10/14/2010 2.20 10/14/2010 6.30 9/21/2010 0.18 130 10/19/2010 <2.0 10/19/2010 4.10 9/22/2010 0.14 131 10/20/2010 <2.0 10/20/2010 2.70 9/23/2010 0.20 132 10/21/2010 2.20 10/21/2010 3.20 9/28/2010 0.15 133 10/26/2010 3.70 10/26/2010 <3.8 9/29/2010 2.64 134 10/27/2010 <2.0 10/27/2010 6.00 9/30/2010 0.79 135 10/28/2010 11.00 10/28/2010 52.00 10/5/2010 0.11 136 11 /2/2010 <2.0 11/2/2010 <3.3 10/6/2010 0.09 137 11/3/2010 <2.0 11/3/2010 6.40 10/7/2010 0.09 138 11/4/2010 <2.0 11/4/2010 8.80 10/12/2010 0.08 139 11/9/2010 <2.0 11/9/2010 4.60 10/13/2010 0.09 140 11/10/2010 <2.0 11/10/2010 <4.2 10/14/2010 0.04 141 11/11/2010 <2.0 11/11/2010 5.80 10/19/2010 4.89 142 11/16/2010 4.40 11/16/2010 <3.3 10/20/2010 5.35 143 11/17/2010 • 4.40 11/17/2010 6.40 10/21/2010 2.53 144 11/18/2010 <2.0 11/18/2010 7.10 10/26/2010 0.14 145 11 /22/2010 2.30 11/22/2010 <6.3 10/27/2010 0.12 146 11/23/2010 <2.0 11/23/2010 7.80 10/28/2010 2.20 147 11/24/2010 <2.0 11/24/2010 5.50 11/2/2010 0.38 148 11/30/2010 <2.0 11/30/2010 <4.2 11/3/2010 0.33 149 12/1/2010 <2.0 12/1/2010 <5.0 11/4/2010 0.40 150 12/2/2010 8.10 12/2/2010 10.00 11/9/2010 1.14 151 12/7/2010 4.00 12/7/2010 <3.3 11/10/2010 0.60 152 12/8/2010 3.80 12/8/2010 9.80 11/11/2010 0.29 153 12/9/2010 <2.0 12/9/2010 13.00 11/16/2010 0.09 154 12/14/2010 4.50 12/14/2010 6.80 11/17/2010 1.81 155 12/15/2010 2.90 12/15/2010 13.00 11/18/2010 0.95 156 12/16/2010 2.00 12/16/2010 4.00 11/22/2010 0.11 157 12/21/2010 <2.0 12/21/2010 3.00 11/23/2010 0.08 158 12/22/2010 <2.0 12/22/2010 3.40 11/24/2010 0.08 159 12/23/2010 <2.0 12/23/2010 <2.7 11/30/2010 0.33 160 12/28/2010 2.10 12/28/2010 <6.3 12/1/2010 0.22 161 12/29/2010 <2.0 12/29/2010 3.40 12/2/2010 4.36 162 12/30/2010 <2.0 12/30/2010 3.30 12/7/2010 2.73 163 1/4/2011 <2.0 1/4/2011 <2.7 12/8/2010 2.83 164 " 1/5/2011 2.30 1/5/2011 6.00 12/9/2010 0.14 165 1/6/2011 2.10 1/6/2011 5.60 12/14/2010 3.55 166 1/11/2011 2.70 1/11/2011 4.00 12/15/2010 3.37 167 1/12/2011 2.70 1/12/2011 3.10 12/16/2010 1.31 168 1/13/2011 <2.0 1/13/2011 3.60 12/21/2010 0.07 169 1/18/2011 <2.0 1/18/2011 6.50 12/22/2010 0.05 170 1/19/2011 <2.0 1/19/2011 3.50 12/23/2010 <0.04 171 1/20/2011 <2.0 1/20/2011 2.70 12/28/2010 <0.04 172 1/25/2011 <2.0 1/25/2011 5.30 12/29/2010 <0.04 173 1/26/2011 <2.0 1/26/2011 4.40 12/30/2010 0.10 174 1/27/2011 2.00 1/27/2011 4.30 1/4/2011 0.16 175 2/1/2011 2.60 2/1/2011 3.10 1/5/2011 0.08 176 2/2/2011 2.90 2/2/2011 4.90 1/6/2011 0.11 177 2/3/2011 4.10 2/3/2011 9.40 1/11/2011 0.13 178 2/8/2011 2.30 2/8/2011 <7.1 1/12/2011 0.17 179 2/9/2011 3.10 2/9/2011 5.80 1/13/2011 0.08 180 2/10/2011 <2.0 2/10/2011 4.30 1/18/2011 0.17 I A B C D E F G H I I J 181 2/15/2011 3.10 2/15/2011 9.50 1/19/2011 0.42 182 2/16/2011 <2.0 2/16/2011 <2.8 1/20/2011 6.25 183 2/17/2011 <2.0 2/17/2011 <2.5 1/25/2011 5.50 184 2/22/2011 <2.0 2/22/2011 3.80 1/26/2011 1.32 185 2/23/2011 <2.0 2/23/2011 <2.5 1/27/2011 0.21 186 2/24/2011 <2.0 2/24/2011 <2.5 2/1/2011 0.23 187 3/1/2011 <2.0 3/1/2011 5.20 2/2/2011 0.10 188 3/2/2011 <2.0 3/2/2011 9.60 2/3/2011 0.08 189 3/3/2011 3.00 3/3/2011 5.70 2/8/2011 0.14 190 3/8/2011 <2.0 3/8/2011 5.10 2/9/2011 0.36 191 3/9/2011 <2.0 3/9/2011 6.30 2/10/2011 0.52 192 3/10/2011 16.00 3/10/2011 30.00 2/15/2011 0.43 193 3/11/2011 15.00 3/11/2011 27.00 2/16/2011 0.12 194 3/15/2011 <2.0 3/15/2011 <7.1 2/17/2011 0.27 195 3/16/2011 <2.0 3/16/2011 2.60 2/22/2011 0.17 196 3/17/2011 <2.0 3/17/2011 4.50 2/23/2011 0.15 197 3/22/2011 2.10 3/22/2011 2.70 2/24/2011 0.19 198 3/23/2011 <2.0 3/23/2011 <2.5 3/1/2011 1.49 199 3/24/2011 3.50 3/24/2011 4.00 3/2/2011 1.47 200 3/29/2011 <2.0 3/29/2011 4.80 3/3/2011 0.39 201 3/30/2011 <2.0 3/30/2011 8.50 3/8/2011 2.03 202 3/31/2011 6.10 3/31/2011 11.00 3/9/2011 0.09 203 4/5/2011 6.40 4/5/2011 13.00 3/10/2011 5.94 204 4/6/2011 5.40 4/6/2011 7.20 3/15/2011 0.12 205 4/7/2011 3.30 4/7/2011 <2.5 3/16/2011 0.11 206 4/12/2011 2.50 4/12/2011 <2.7 3/17/2011 0.10 207 4/13/2011 2.40 4/13/2011 <2.8 3/22/2011 0.12 208 r-- 4/14/2011 3.10 4/14/2011 7.30 3/23/2011 0.19 209 4/19/2011 4.40 4/19/2011 6.00 3/24/2011 0.16 210 4/20/2011 5.60 4/20/2011 <5.6 3/29/2011 4.06 211 4/21/2011 <2.0 4/21/2011 <2.5 3/30/2011 4.16 212 4/26/2011 <2.0 4/26/2011 <3.1 3/31/2011 0.73 213 4/27/2011 <2.0 4/27/2011 <2.5 4/5/2011 5.18 214 4/28/2011 <2.0 4/28/2011 <2.6 4/6/2011 5.13 215 5/3/2011 <2.0 5/3/2011 <2.5 4/7/2011 0.43 216 5/4/2011 33.00 5/4/2011 240.00 4/12/2011 0.46 217 5/5/2011 15.00 5/5/2011 10.00 4/13/2011 0.50 218 5/10/2011 <2.0 5/10/2011 <2.5 4/14/2011 0.92 219 5/11/2011 <2.0 5/11/2011 5.00 4/19/2011 6.66 220 5/12/2011 <2.0 5/12/2011 5.10 4/20/2011 3.74 221 5/17/2011 <2.0 5/17/2011 <3.6 4/21/2011 0.15 222 5/18/2011 3.10 5/18/2011 7.10 4/26/2011 0.21 223 5/19/2011 20.00 5/19/2011 15.00 4/27/2011 0.17 224 5/24/2011 3.80 5/20/2011 <5.3 4/28/2011 0.21 225 5/25/2011 3.90 5/21/2011 <5.4 5/3/2011 0.17 226 5/26/2011 3.30 5/24/2011 2.70 5/4/2011 1.24 227 5/31/2011 4.80 5/25/2011 9.80 5/5/2011 4.02 228 6/1/2011 3.80 5/26/2011 6.70 5/10/2011 0.11 229 6/2/2011 2.60 5/31/2011 4.80 5/11/2011 0.11 230 6/7/2011 3.40 6/1/2011 4.90 5/12/2011 1.27 231 6/8/2011 <2.0 6/2/2011 4.10 5/17/2011 0.82 232 6/9/2011 2.70 6/7/2011 6.50 5/18/2011 0.88 233 6/14/2011 3.00 6/8/2011 3.20 5/19/2011 5.72 234 6/15/2011 2.90 6/9/2011 5.20 5/24/2011 0.24 235 6/16/2011 2.30 6/14/2011 4.30 5/25/2011 0.34 236 6/21/2011 4.70 6/15/2011 5.20 5/26/2011 2.52 237 6/22/2011 2.80 6/16/2011 6.40 5/31/2011 0.11 238 6/23/2011 <2.0 6/21/2011 8.60 6/1/2011 0.14 239 6/28/2011 4.00 6/22/2011 8.90 6/2/2011 0.14 240 6/29/2011 3.90 6/23/2011 7.70 6/7/2011 0.20 A B C D EIF I G H I J 241 6/30/2011 2.40 6/28/2011 15.00 6/8/2011 0.15 242 7/5/2011 <2.0 6/29/2011 9.30 6/9/2011 0.20 243 7/6/2011 4.30 6/30/2011 11.00 6/14/2011 0.32 244 7/7/2011 <2.0 7/5/2011 4.90 6/15/2011 0.32 245 7/12/2011 3.50 7/6/2011 14.00 6/16/2011 0.21 246 7/13/2011 <2.0 7/7/2011 10.00 6/21/2011 0.20 247 7/14/2011 2.10 7/12/2011 5.20 6/22/2011 1.30 248 7/19/2011 <2.0 7/13/2011 3.90 6/23/2011 0.21 249 7/20/2011 <2.0 7/14/2011 5.80 6/28/2011 0.26 250 7/21/2011 2.60 7/19/2011 5.80 6/29/2011 0.24 251 7/26/2011 <2.0 7/20/2011 5.50 6/30/2011 0.24 252 7/27/2011 <2.0 7/21/2011 6.60 7/5/2011 0.39 253 7/28/2011 <2.0 7/26/2011 <5.6 7/6/2011 0.34 254 8/2/2011 <2.0 7/27/2011 <3.1 7/7/2011 0.16 255 8/3/2011 <2.0 7/28/2011 6.40 7/12/2011 0.22 256 8/4/2011 <2.0 8/2/2011 <4.5 7/13/2011 0.18 257 8/8/2011 10.00 8/3/2011 8.80 7/14/2011 0.21 258 8/9/2011 <2.0 8/4/2011 9.40 7/19/2011 0.14 259 8/10/2011 <2.0 8/8/2011 22.00 7/20/2011 0.19 260 8/11/2011 <2.0 8/9/2011 6.70 7/21/2011 0.16 261 8/16/2011 <2.0 8/10/2011 11.00 7/26/2011 0.21 262 8/17/2011 <2.0 8/11/2011 12.00 7/27/2011 0.15 263 8/18/2011 2.30 8/16/2011 13.00 7/28/2011 0.32 264 8/23/2011 <2.0 8/17/2011 18.00 8/2/2011 0.18 265 8/24/2011 2.40 8/18/2011 19.00 8/3/2011 0.14 266 8/25/2011 2.90 8/23/2011 7.70 8/4/2011 0.21 267 8/30/2011 2.20 8/24/2011 14.00 8/8/2011 7.14 268 8/31/2011 2.20 8/25/2011 26.00 8/9/2011 0.15 269 9/1/2011 <2.0 8/30/2011 22.00 8/10/2011 0.15 270 9/6/2011 5.00 8/31/2011 34.00 8/11 /2011 0.16 271 9/7/2011 5.60 9/1/2011 <8.3 8/16/2011 0.16 272 9/8/2011 10.00 9/6/2011 6.20 8/17/2011 0.16 273 9/13/2011 <2.0 9/7/2011 13.00 8/18/2011 0.16 274 9/14/2011 <2.0 9/8/2011 22.00 8/23/2011 0.23 275 9/15/2011 <2.0 9/13/2011 <5.0 8/24/2011 0.21 276 9/20/2011 <2.0 9/14/2011 17.00 8/25/2011 0.15 277 9/21/2011 <2.0 9/15/2011 <8.3 8/30/2011 1.17 278 9/22/2011 <2.0 9/20/2011 4.50 8/31/2011 1.14 279 9/27/2011 <2.0 9/21/2011 5.40 9/1/2011 1.17 280 9/28/2011 2.30 9/22/2011 19.00 9/6/2011 1.19 281 9/29/2011 <2.0 . 9/27/2011 <2.8 9/7/2011 1.78 282 10/4/2011 <2.0 9/28/2011 4.80 9/8/2011 7.14 283 10/5/2011 <2.0 9/29/2011 <3.1 9/13/2011 0.07 284 10/6/2011 <2.0 10/4/2011 7.70 9/14/2011 0.09 285 10/11/2011 2.20 10/5/2011 16.00 9/15/2011 0.14 286 10/12/2011 <2.0 10/6/2011 18.00 9/20/2011 0.19 287 10/13/2011 7.30 10/11/2011 28.00 9/21/2011 0.17 288 10/18/2011 <2.0 10/12/2011 16.00 9/22/2011 12.88 289 10/19/2011 2.30 10/13/2011 13.00 9/27/2011 0.24 290 • 10/20/2011 <2.0 10/18/2011 <3.3 9/28/2011 0.26 291 10/25/2011 4.20 10/19/2011 6.80 9/29/2011 0.10 292 10/26/2011 2.90 10/20/2011 3.40 10/4/2011 0.13 293 10/27/2011 <2.0 10/25/2011 <8.3 10/5/2011 0.11 294 11/1/2011 2.90 10/26/2011 <6.3 10/6/2011 0.15 295 11/2/2011 5.70 10/27/2011 <6.3 10/11/2011 0.30 296 11/3/2011 <2.0 11/1/2011 <6.3 10/12/2011 0.18 297 11/8/2011 3.20 11/2/2011 12.00 10/13/2011 2.28 298 11/9/2011 6.00 11/3/2011 <7.1 10/18/2011 0.07 299 11/10/2011 3.20 11/8/2011 <7.1 10/19/2011 0.12 300 11/15/2011 4.10 11/9/2011 16.00 10/20/2011 0.10 A B I C D E F G I H I J 301 11/16/2011 2.50 11/10/2011 11.00 10/25/2011 0.09 302 11/17/2011 5.80 11/15/2011 16.00 10/26/2011 0.08 303 11/21/2011 5.00 11/16/2011 15.00 10/27/2011 0.23 304 11/22/2011 <2.0 11/17/2011 23.00 11 /1 /2011 0.07 305 11/23/2011 <2.0 11/21/2011 15.00 11/2/2011 0.12 306 11/29/2011 57.00 11/22/2011 <7.7 11/3/2011 0.08 307 11/30/2011 15.00 11/23/2011 12.00 11/8/2011 0.20 308 12/1/2011 9.20 11/29/2011 232.00 11/9/2011 0.10 309 12/2/2011 <2.0 11/30/2011 45.00 11/10/2011 0.07 310 12/6/2011 <2.0 12/1/2011 19.00 11/15/2011 0.10 311 12/7/2011 <2.0 12/2/2011 11.00 11/16/2011 0.15 312 12/8/2011 3.90 12/6/2011 <8.3 11/17/2011 0.10 313 12/13/2011 2.10 12/7/2011 <7.1 11/21/2011 0.06 314 12/14/2011 3.70 12/8/2011 16.00 11/22/2011 0.06 315 12/15/2011 <2.0 12/13/2011 12.00 11/23/2011 0.08 316 12/20/2011 3.10 12/14/2011 <8.3 11/29/2011 4.68 317 12/21/2011 2.20 12/15/2011 7.70 11/30/2011 26.00 318 12/22/2011 2.40 12/20/2011 5.80 12/1/2011 5.86 319 12/27/2011 <2.0 12/21/2011 <5.0 12/2/2011 1.50 320 12/28/2011 5.10 12/22/2011 7.50 12/6/2011 0.21 321 12/29/2011 3.50 12/27/2011 <7.1 12/7/2011 0.12 322 1/3/2012 <2.0 12/28/2011 8.30 12/8/2011 3.65 323 1/4/2012 3.90 12/29/2011 <6.3 12/13/2011 0.09 324 1/5/2012 4.50 1/3/2012 <2.5 12/14/2011 0.15 325 1/10/2012 3.50 1/4/2012 <3.7 12/15/2011 0.06 326 1/11/2012 <2.0 1/5/2012 20.00 12/20/2011 0.04 327 1/12/2012 3.40 1/10/2012 9.00 12/21/2011 0.04 328 1/17/2012 3.90 1/11/2012 6.00 12/22/2011 0.07 329 1/18/2012 5.10 1/12/2012 <7.1 12/27/2011 0.15 330 1/19/2012 2.30 1/17/2012 6.20 12/28/2011 0.08 331 1/24/2012 2.50 1/18/2012 9.30 12/29/2011 <0.04 332 1/25/2012 3.50 1/19/2012 8.00 1/3/2012 0.09 333 1/26/2012 <2.0 1/24/2012 <5.0 1/4/2012 0.12 334 1/31/2012 3.10 1/25/2012 11.00 1/5/2012 0.10 335 2/1/2012 3.10 1/26/2012 7.50 1/10/2012 0.09 336 2/2/2012 <2.0 1/31/2012 <3.6 1/11/2012 0.07 337 2/7/2012 4.50 2/1/2012 7.10 1/12/2012 0.22 338 2/8/2012 2.50 2/2/2012 <3.3 1/17/2012 0.10 339 2/9/2012 8.90 2/7/2012 8.70 1/18/2012 0.13 340 2/14/2012 4.00 2/8/2012 5.80 1/19/2012 0.06 341 2/15/2012 3.00 2/9/2012 5.50 1/24/2012 0.13 342 2/16/2012 4.10 2/14/2012 10.00 1/25/2012 0.13 343 2/21/2012 13.00 2/15/2012 12.00 1/26/2012 0.12 344 2/22/2012 5.60 2/16/2012 8.70 1/31/2012 0.10 345 2/23/2012 4.80 2/21/2012 20.00 2/1/2012 0.08 346 2/28/2012 2.60 2/22/2012 19.00 2/2/2012 0.11 347 2/29/2012 2.30 2/23/2012 23.00 2/7/2012 0.18 348 3/1/2012 2.80 2/28/2012 <7.7 2/8/2012 0.22 349 3/6/2012 8.70 2/29/2012 <4.2 2/9/2012 0.17 350 3/7/2012 8.60 3/1/2012 <4.2 2/14/2012 0.09 351 3/8/2012 4.30 3/6/2012 <10.0 2/15/2012 0.08 352 3/13/2012 <2.0 3/7/2012 19.00 2/16/2012 0.11 353 3/14/2012 3.60 3/8/2012 9.10 2/21/2012 6.05 354 3/15/2012 4.70 3/13/2012 6.70 2/22/2012 3.46 355 3/20/2012 2.20 3/14/2012 2.90 2/23/2012 0.11 356 3/21/2012 4.10 3/15/2012 5.50 2/28/2012 0.08 357 3/22/2012 <2.0 3/20/2012 3.40 2/29/2012 0.08 358 3/28/2012 4.10 3/21/2012 5.30 3/1/2012 0.06 359 3/29/2012 3.10 3/22/2012 3.60 3/6/2012 2.00 360 3/30/2012 <2.0 3/28/2012 5.20 3/7/2012 0.08 A B C D E F G H 1 1 J 361 4/3/2012 2.00 3/29/2012 3.70 3/8/2012 0.07 362 4/4/2012 <2.0 3/30/2012 <2.5 3/13/2012 0.12 363 4/5/2012 3.10 4/3/2012 5.00 3/14/2012 0.08 364 4/10/2012 2.60 4/4/2012 4.50 3/15/2012 0.06 365 4/11/2012 3.90 4/5/2012 3.20 3/20/2012 0.32 366 4/12/2012 2.30 4/10/2012 11.00 3/21/2012 0.10 367 4/17/2012 <2.0 4/11/2012 6.20 3/22/2012 0.09 368 4/18/2012 3.10 4/12/2012 7.60 3/28/2012 0.77 369 4/19/2012 4.30 4/17/2012 5.10 3/29/2012 0.08 370 . 4/24/2012 39.00 4/18/2012 2.60 3/30/2012 <0.10 371 4/25/2012 2.90 4/19/2012 <2.5 4/3/2012 0.09 372 . 4/26/2012 <2.0 4/24/2012 12.00 4/4/2012 0.05 373 5/1/2012 <2.0 4/25/2012 7.30 4/5/2012 0.07 374 5/2J2012 <2.0 4/26/2012 2.70 4/10/2012 0.20 375 5/3/2012 <2.0 5/1/2012 <2.5 4/11/2012 0.08 376 5/8/2012 <2.0 5/2/2012 4.60 4/12/2012 0.05 377 5/9/2012 3.30 5/3/2012 5.30 4/17/2012 0.24 378 5/10/2012 3.60 5/8/2012 <2.5 4/18/2012 0.17 379 5/15/2012 2.60 5/9/2012 3.60 4/19/2012 0.09 380 5/16/2012 5.20 5/10/2012 4.80 4/24/2012 12.56 381 5/17/2012 <2.0 5/15/2012 4.90 4/25/2012 2.09 382 5/18/2012 <2.0 5/16/2012 16.00 4/26/2012 0.10 383 5/22/2012 <2.0 5/17/2012 3.20 5/1/2012 0.15 384 5/23/2012 <2.0 5/18/2012 <2.5 5/2/2012 0.16 385 5/24/2012 <2.0 5/22/2012 <2.5 5/3/2012 0.04 386 5/29/2012 <2.0 5/23/2012 <2.5 5/8/2012 0.10 387 5/30/2012 2.00 5/24/2012 4.40 5/9/2012 0.13 388 5/31/2012 <2.0 5/29/2012 <2.5 5/10/2012 2.45 389 6/5/2012 2.10 5/30/2012 2.60 5/15/2012 1.54 390 6/6/2012 <2.0 5/31/2012 3.80 5/16/2012 1.66 391 6/7/2012 <2.0 6/5/2012 <2.8 5/17/2012 0.14 392 6/12/2012 2.80 6/6/2012 3.80 5/18/2012 0.20 393 6/13/2012 2.20 6R/2012 <2.8 5/22/2012 0.17 394 6/14/2012 3.60 6/12/2012 11.00 5/23/2012 0.48 395 6/19/2012 4.20 6/13/2012 <2.5 5/24/2012 0.16 396 6/20/2012 <2.0 6/14/2012 5.00 5/29/2012 0.21 397 6/21/2012 2.70 6/19/2012 3.80 5/30/2012 0.19 398 6/26/2012 2.10 6/20/2012 3.70 5/31/2012 0.21 399 6/27/2012 2.30 6/21/2012 3.10 6/5/2012 0.13 400 6/28/2012 <2.0 6/26/2012 <2.5 6/6/2012 0.14 401 7/2/2012 <2.0 6/27/2012 2.80 6/7/2012 0.11 402 7/3/2012 <2.0 6/28/2012 <2.5 6/12/2012 0.17 403 7/4/2012 <2.0 7/2/2012 <2.5 6/13/2012 0.11 404 7/10/2012 <2.0 7/3/2012 3.20 6/14/2012 2.36 405 7/11/2012 <2.0 7/4/2012 <2.5 6/19/2012 0.21 406 7/12/2012 2.60 7/10/2012 10.00 6/20/2012 0.15 407 7/17/2012 2.70 7/11/2012 <2.8 6/21/2012 0.24 408 7/18/2012 2.90 7/12/2012 6.00 6/26/2012 0.17 409 7/19/2012 <2.0 7/17/2012 <2.8 6/27/2012 0.18 410 7/24/2012 4.30 7/18/2012 <2.8 6/28/2012 0.12 411 7/25/2012 <2.0 7/19/2012 <2.5 7/2/2012 0.21 412 7/26/2012 <2.0 7/24/2012 5.10 7/3/2012 0.13 413 7/31/2012 <2.0 7/25/2012 4.30 7/4/2012 0.12 414 8/1/2012 <2.0 7/26/2012 3.60 7/10/2012 0.12 415 8/2/2012 <2.0 7/31/2012 <2.5 7/11/2012 0.22 416 8/7/2012 <2.0 8/1/2012 3.80 7/12/2012 0.70 417 8/8/2012 <2.0 8/2/2012. <5.6 7/17/2012 0.15 418 8/9/2012 <2.0 8R/2012 9.00 7/18/2012 0.86 419 8/14/2012 <2.0 . 8/8/2012 6.30 7/19/2012 0.40 420 8/15/2012 <2.0 8/9/2012 6.20 7/24/2012 1.23 I A B C D E F G H I 1 I J 421 8/16/2012 <2.0 8/14/2012 <4.2 7/25/2012 0.35 422 8/21/2012 5.00 8/15/2012 5.40 7/26/2012 0.13 423 8/22/2012 3.20 8/16/2012 3.40 7/31/2012 0.08 424 8/23/2012 2.50 8/21/2012 5.80 8/1/2012 0.06 425 8/28/2012 <2.0 8/22/2012 10.00 8/2/2012 0.09 426 8/29/2012 <2.0 8/23/2012 6.60 8/7/2012 0.20 427 8/30/2012 <2.0 8/28/2012 3.60 8/8/2012 0.78 428 9/4/2012 2.10 8/29/2012 3.60 8/9/2012 0.92 429 9/5/2012 <2.0 8/30/2012 2.80 8/14/2012 0.15 430 9/6/2012 <2.0 9/4/2012 <2.5 8/15/2012 0.92 431 9/11/2012 <2.0 9/5/2012 <2.5 8/16/2012 0.18 432 9/12/2012 <2.0 9/6/2012 3.90 8/21/2012 4.06 433 9/13/2012 <2.0 9/11/2012 2.70 8/22/2012 5.60 434 9/18/2012 2.10 9/12/2012 <2.5 8/23/2012 1.12 435 9/19/2012 <2.0 • 9/13/2012 4.20 8/28/2012 0.15 436 9/20/2012 2.40 9/18/2012 3.80 8/29/2012 0.11 437 9/25/2012 <2.0 9/19/2012 <2.5 8/30/2012 0.17 438 9/26/2012 2.50 9/20/2012 11.00 9/4/2012 0.71 439 9/27/2012 <2.0 9/25/2012 <3.6 9/5/2012 0.55 440 10/2/2012 5.30 9/26/2012 3.30 9/6/2012 0.13 441 10/3/2012 5.60 9/27/2012 3.50 9/11/2012 0.13 442 10/4/2012 6.90 10/2/2012 3.30 9/12/2012 0.14 443 10/9/2012 6.80 10/3/2012 7.20 9/13/2012 0.14 444 10/10/2012 2.10 10/4/2012 5.30 9/18/2012 0.18 445 10/11/2012 2.30 10/9/2012 5.90 9/19/2012 0.10 446 10/16/2012 3.70 10/10/2012 2.50 9/20/2012 0.15 447 10/17/2012 3.00 10/11/2012 <2.5 9/25/2012 0.24 448 10/18/2012 <2.0 10/16/2012 2.90 9/26/2012 0.10 449 10/23/2012 <2.0 10/17/2012 <2.5 9/27/2012 0.16 450 10/24/2012 2.90 10/18/2012 <2.5 10/2/2012 3.00 451 10/25/2012 <2.0 10/23/2012 3.20 10/3/2012 2.99 452 10/30/2012 <2.0 10/24/2012 <2.5 10/4/2012 3.04 453 10/31/2012 <2.0 10/25/2012 3.60 10/9/2012 5.01 454 11/1/2012 <2.0 10/30/2012 3.20 10/10/2012 0.36 455 11/6/2012 <2.0 10/31/2012 <2.5 10/11/2012 0.09 456 11/7/2012 2.30 11/1/2012 <2.5 10/16/2012 0.37 457 11/8/2012 <2.0 11/6/2012 <2.5 10/17/2012 0.25 458 11/13/2012 2.30 11/7/2012 <3.1 10/18/2012 0.07 459 11/14/2012 <2.0 11/8/2012 <2.5 10/23/2012 0.07 460 11/15/2012 <2.0 11/13/2012 3.40 10/24/2012 0.09 461 11/19/2012 <2.0 11/14/2012 5.20 10/25/2012 0.05 462 11/20/2012 3.40 11/15/2012 <2.5 10/30/2012 0.07 463 11/21/2012 <2.0 11/19/2012 5.00 10/31/2012 0.05 464 11/27/2012 <2.0 11/20/2012 6.20 11/1/2012 0.24 465 11/28/2012 <2.0 11/21/2012 4.40 11/6/2012 0.80 466 11/29/2012 4.40 11/27/2012 <2.5 11/7/2012 0.11 467 12/4/2012 <2.0 11/28/2012 <2.5 11/8/2012 0.19 468 12/5/2012 <2.0 11/29/2012 5.10 11/13/2012 0.13 469 12/6/2012 2.50 12/4/2012 4.70 11/14/2012 0.13 470 12/11 /2012 <2.0 12/5/2012 3.90 11/15/2012 0.08 471 12/12/2012 <2.0 12/6/2012 4.70 11/19/2012 0.09 472 12/13/2012 <2.0 12/11/2012 3.30 11/20/2012 0.04 473 12/18/2012 2.30 12/12/2012 <2.5 11/21/2012 0.04 474 12/19/2012 2.50 12/13/2012 <2.5 11/27/2012 0.09 475 12/20/2012 3.70 12/18/2012 <3.8 11/28/2012 0.17 476 12/26/2012 24.00 12/19/2012 7.80 11/29/2012 0.07 477 12/27/2012 49.00 12/20/2012 7.00 12/4/2012 0.09 478 12/28/2012 8.40 12/26/2012 15.00 12/5/2012 0.12 479 12/30/2012 3.70 12/27/2012 67.00 12/6/2012 0.11 480 12/28/2012 11.00 12/11/2012 0.12 A B C D E F G H I J 481 12/30/2012 5.30 12/18/2012 0.10 482 12/26/2012 6.38 483 484 485 486 Average 6.02 9.75 1.79 487 488 Permit Limit 30 30 16 489 50% of Limit 15 15 8 K L I M 1 2 3 4 Fecal Coliform 5 #/100 Col 6 1/5/2010 2.00 7 1/6/2010 3.00 8 1/7/2010 1.00 9 1/12/2010 2.00 10 1/13/2010 <1.0 11 1/14/2010 2.00 12 1/19/2010 <1.0 13 1/20/2010 9.00 14 1/21/2010 1.00 15 1/26/2010 <1.0 16 1/27/2010 <1.0 17 1/28/2010 440.00 18 1/29/2010 1.00 19 2/2/2010 <1.0 20 2/3/2010 <1.0 21 2/4/2010 <1.0 22 2/9/2010 <1.0 23 2/10/2010 2450.00 24 2/11/2010 <1.0 25 2/16/2010 43.00 26 2/17/2010 1.00 27 2/18/2010 2.00 28 2/23/2010 1.00 29 2/24/2010 <1.0 30 2/25/2010 2.00 31 3/2/2010 5.00 32 3/3/2010 <1.0 33 3/4/2010 1.00 34 3/9/2010 <1.0 35 3/10/2010 <1.0 36 3/11/2010 2.00 37 3/16/2010 1.00 38 3/17/2010 1.00 39 3/18/2010 3.00 40 3/23/2010 <1.0 41 3/24/2010 1.00 42 3/25/2010 2.00 43 3/30/2010 2.00 44 3/31/2010 <1.0 45 4/1/2010 <1.0 46 4/6/2010 1.00 47 4/7/2010 <1.0 48 ! 4/8/2010 <1.0 49 4/13/2010 <1.0 50 4/14/2010 <1.0 51 4/15/2010 <1.0 52 4/20/2010 <1.0 53 4/21/2010 <1.0 54 4/22/2010 <1.0 55 4/27/2010 <1.0 56 4/28/2010 0.00 57 4/29/2010 <1.0 58 5/4/2010 <1.0 59 5/5/2010 <1.0 60 5/6/2010 <1.0 K L M 61 5/11/2010 7.00 62 5/12/2010 7.00 63 5/13/2010 4.00 64 5/18/2010 1.00 65 5/19/2010 9.00 66 5/20/2010 3.00 67 5/25/2010 7.00 68 5/26/2010 <1.0 69 5/27/2010 1.00 70 6/1/2010 2.00 71 6/2/2010 2.00 72 6/3/2010 <4.0 73 6/8/2010 2.00 74 6/9/2010 <1.0 75 6/10/2010 1.00 76 6/15/2010 <1.0 77 6/16/2010 <1.0 78 6/17/2010 4.00 79 6/22/2010 <1.0 80 6/23/2010 1.00 81 6/24/2010 12.00 82 6/29/2010 <1.0 83 6/30/2010 7.00 84 7/1/2010 14.00 85 7/6/2010 8.00 86 7/7/2010 11.00 87 7/8/2010 10.00 88 7/13/2010 11.00 89 7/14/2010 37.00 90 7/15/2010 24.00 91 7/20/2010 26.00 92 7/21/2010 21.00 93 7/22/2010 12.00 94 7/27/2010 26.00 95 7/28/2010 50.00 96 7/29/2010 26.00 97 8/3/2010 16.00 98 8/4/2010 182.00 99 8/5/2010 23.00 100 8/10/2010 31.00 101 8/11/2010 5.00 102 8/12/2010 12.00 103 8/17/2010 4.00 104 8/18/2010 205.00 105 8/19/2010 2650.00 106 8/24/2010 11.00 ^107 8/25/2010 3.00 108 8/26/2010 8.00 109 8/31/2010 5.00 110 9/1/2010 11.00 111 9/2/2010 145.00 112 9/7/2010 9.00 113 9/8/2010 36.00 114 9/9/2010 40.00 115 9/14/2010 12.00 116 9/15/2010 <1.0 117 9/16/2010 8.00 118 9/21/2010 13.00 119 9/22/2010 31.00 120 9/23/2010 41.00 K L M 121 9/28/2010 2.00 122 9/29/2010 17.00 123 9/30/2010 6000.00 124 10/5/2010 285.00 125 10/6/2010 26.00 126 10/7/2010 4200.00 127 10/12/2010 4.00 128 10/13/2010 3.00 129 10/14/2010 2.00 130 10/19/2010 <1.0 131 10/20/2010 <1.0 132 10/21/2010 2.00 133 10/26/2010 <1.0 134 10/27/2010 51.00 135 10/28/2010 3.00 136 11/2/2010 <1.0 137 11/3/2010 3.00 138 11/4/2010 17.00 139 11/9/2010 <1.0 140 11/10/2010 7.00 141 11/11/2010 10.00 142 11/16/2010 3.00 143 11/17/2010 <1.0 144 11/18/2010 5.00 145 11/22/2010 5.00 146 11/23/2010 1.00 147 11/24/2010 3.00 148 11/30/2010 <1.0 149 12/1/2010 6.00 150 12/2/2010 <1.0 151 12/7/2010 <1.0 152 12/8/2010 8.00 153 12/9/2010 2.00 154 12/14/2010 <1.0 155 12/15/2010 5.00 156 12/16/2010 <1.0 157 12/21/2010 <1.0 158 12/22/2010 6.00 159 12/23/2010 2.00 160 12/28/2010 <1.0 161 12/29/2010 <1.0 162 12/30/2010 2.00 163 1/4/2011 <1.0 164 1/5/2011 <1.0 165 1/6/2011 1.00 166 1/11/2011 14.00 167 1 /12/2011 2.00 168 1/13/2011 1.00 169 1/18/2011 <1.0 170 1/19/2011 <1.0 171 1/20/2011 1.00 172 1/25/2011 <1.0 173 1/26/2011 3.00 174 1/27/2011 1.00 175 2/1/2011 <1.0 176 2/2/2011 2.00 177 2/3/2011 <1.0 178 2/8/2011 1.00 179 2/9/2011 2.00 180 2/10/2011 1.00 I K L M 181 2/15/2011 <1.0 182 2/16/2011 <1.0 183 2/17/2011 <1.0 184 2/22/2011 <1.0 185 2/23/2011 <1.0 186 2/24/2011 1.00 187 3/1/2011 1.00 188 3/2/2011 <1.0 189 3/3/2011 8.00 190 3/8/2011 1.00 191 3/9/2011 2.00 192 3/10/2011 60.00 193 3/11/2011 110.00 194 3/15/2011 11.00 195 3/16/2011 1.00 196 3/17/2011 <1.0 197 3/22/2011 <1.0 198 3/23/2011 <1.0 199 3/24/2011 18.00 200 3/29/2011 3.00 201 3/30/2011 4.00 202 3/31/2011 4.00 203 4/5/2011 <1.0 204 4/6/2011 1.00 205 4/7/2011 2.00 206 4/12/2011 2.00 207 4/13/2011 1.00 208 4/14/2011 1.00 209 4/19/2011 1.00 210 4/20/2011 7.00 211 4/21/2011 7.00 212 4/26/2011 1.00 213 4/27/2011 1.00 214 4/28/2011 5.00 215 5/3/2011 3.00 216 5/4/2011 6000.00 217 5/5/2011 <1.0 218 5/10/2011 <1.0 219 5/11/2011 2.00 220 5/12/2011 5.00 221 5/17/2011 6000.00 222 5/18/2011 6000.00 223 5/19/2011 6.00 224 5/24/2011 14.00 225 5/25/2011 <1.0 226 5/26/2011 33.00 227 5/31/2011 3.00 228 6/1/2011 1.00 229 6/2/2011 17.00 230 6/7/2011 8.00 231 6/8/2011 10.00 232 6/9/2011 13.00 233 6/14/2011 275.00 234 6/15/2011 1400.00 235 6/16/2011 850.00 236 6/21/2011 23.00 237 6/22/2011 38.00 238 6/23/2011 25.00 239 6/28/2011 5100.00 240 6/29/2011 6000.00 ! K L M 241 6/30/2011 6000.00 242 7/1/2011 15.00 243 7/5/2011 570.00 244 7/6/2011 15.00 245 7/7/2011 <1.0 246 7/12/2011 8.00 247 7/13/2011 6.00 248 7/14/2011 6.00 249 7/19/2011 7.00 250 7/20/2011 23.00 251 7/21/2011 38.00 252 7/26/2011 2.00 253 7/27/2011 2.00 254 7/28/2011 3.00 255 8/2/2011 450.00 256 8/3/2011 10.00 257 8/4/2011 3.00 258 8/8/2011 6000.00 259 8/9/2011 <1.0 260 8/10/2011 <1.0 261 8/11/2011 1.00 262 8/16/2011 1.00 263 8/17/2011 375.00 264 8/18/2011 1.00 265 8/23/2011 4.00 266 8/24/2011 17.00 267 8/25/2011 1.00 268 8/30/2011 4.00 269 8/31/2011 6.00 270 9/1/2011 50.00 271 9/6/2011 6000.00 272 9/7/2011 6000.00 273 9/8/2011 6000.00 274 9/9/2011 18.00 275 9/13/2011 145.00 276 9/14/2011 14.00 277 9/15/2011 8.00 278 9/20/2011 1.00 279 9/21/2011 3.00 280 9/22/2011 1.00 281 9/27/2011 2.00 282 9/28/2011 3.00 283 9/29/2011 2.00 284 10/4/2011 2.00 285 10/5/2011 3.00 286 10/6/2011 4.00 287 10/11/2011 5.00 288 10/12/2011 9.00 289 10/13/2011 21.00 290 10/18/2011 <1.0 291 10/19/2011 2.00 292 10/20/2011 1.00 293 10/25/2011 3.00 294 10/26/2011 4.00 295 10/27/2011 1.00 296 11 /1 /2011 2700.00 297 11 /2/2011 14.00 298 11/3/2011 2.00 299 11/8/2011 795.00 300 11/9/2011 6000.00 I K L M 301 11/10/2011 15.00 302 11 /11 /2011 <1.0 303 11/15/2011 3.00 304 11/16/2011 47.00 305 11/17/2011 , 6000.00 306 11 /21 /2011 4100.00 307 11/22/2011 5.00 308 11/23/2011 5.00 309 11/29/2011 6000.00 310 11/30/2011 1.00 311 12/1/2011 4.00 312 12/2/2011 1.00 313 12/6/2011 <1.0 314 12/7/2011 <1.0 315 12/8/2011 1.00 316 12/13/2011 2.00 317 12/14/2011 5.00 318 12/15/2011 2.00 319 12/20/2011 2.00 320 12/21/2011 2.00 321 12/22/2011 <1.0 322 12/27/2011 1.00 323 12/28/2011 7000.00 324 12/29/2011 5.00 325 1/3/2012 <1.0 326 1/4/2012 <1.0 327 1/5/2012 1.00 328 1/10/2012 <1.0 329 1/11/2012 <1.0 330 1/12/2012 6000.00 331 1/17/2012 <1.0 332 1/18/2012 2.00 333 1/19/2012 1.00 334 1/24/2012 <1.0 335 1/25/2012 <1.0 336 1/26/2012 <1.0 337 1/30/2012 <1.0 338 1 /31 /2012 33.00 339 2/1/2012 2.00 340 2/2/2012 1.00 341 2/7/2012 <1.0 342 2/8/2012 4.00 343 2/9/2012 3.00 344 2/14/2012 2.00 345 2/15/2012 1.00 346 2/16/2012 5.00 347 2/21/2012 <1.0 348 2/22/2012 10.00 349 2/23/2012 3.00 350 2/28/2012 <1.0 351 2/29/2012 <1.0 352 3/1/2012 1.00 353 3/6/2012 1.00 354 3/7/2012 8.00 355 3/8/2012 4.00 356 3/13/2012 5.00 357 3/14/2012 7.00 358 3/15/2012 1.00 359 3/20/2012 <1.0 360 3/21/2012 <1.0 j K L M 361 3/22/2012 2.00 362 3/28/2012 11.00 363 3/29/2012 4.00 364 3/30/2012 17.00 365 4/3/2012 2.00 366 4/4/2012 8.00 367 4/5/2012 3.00 368 4/10/2012 <1.0 369 4/11/2012 1.00 370 4/12/2012 3.00 371 4/17/2012 1.00 372 4/18/2012 1.00 373 4/19/2012 73.00 374 4/24/2012 <1.0 375 4/25/2012 5.00 376 4/26/2012 2.00 377 5/1/2012 <1.0 378 5/2/2012 21.00 379 5/8/2012 3.00 380 5/9/2012 4.00 381 5/10/2012 2.00 382 5/16/2012 6.00 383 5/17/2012 2.00 384 5/18/2012 1.00 385 5/22/2012 1.00 386 5/23/2012 7.00 387 5/24/2012 6.00 388 5/29/2012 10.00 389 5/30/2012 22.00 390 5/31/2012 21.00 391 6/5/2012 11.00 392 6/6/2012 105.00 393 6/7/2012 24.00 394 6/12/2012 31.00 395 6/13/2012 4.00 396 6/14/2012 14.00 397 6/19/2012 4.00 398 6/20/2012 15.00 399 6/21/2012 24.00 400 6/26/2012 1600.00 401 6/27/2012 1350.00 402 6/28/2012 22.00 403 i 7/2/2012 5.00 404 7/3/2012 2.00 405 7/5/2012 6.00 406 7/10/2012 10.00 407 7/11/2012 6.00 408 7/12/2012 5.00 409 7/17/2012 17.00 410 7/18/2012 5650.00 411 7/19/2012 41.00 412 7/24/2012 9.00 413 7/25/2012 51.00 414 7/26/2012 29.00 415 7/30/2012 2.00 416 7/31/2012 2.00 417 8/1/2012 <1.0 418 8/6/2012 <1.0 419 8/7/2012 <1.0 420 8/8/2012 <1.0 K L M 421 8/13/2012 9.00 422 8/14/2012 <1.0 423 8/15/2012 10.00 424 8/20/2012 10.00 425 8/21/2012 600.00 426 8/22/2012 <1.0 427 8/27/2012 <1.0 428 8/28/2012 <1.0 429 8/29/2012 4.00 430 9/4/2012 2.00 431 9/5/2012 14.00 432 9/6/2012 140.00 433 9/10/2012 100.00 434 9/11/2012 21.00 435 9/12/2012 2.00 436 9/17/2012 10.00 437 9/18/2012 3.00 438 9/19/2012 1.00 439 9/24/2012 5.00 440 9/25/2012 4.10 441 9/26/2012 23.50 442 10/1/2012 2.00 443 10/2/2012 2.00 444 10/3/2012 <1.0 445 10/8/2012 2420.00 446 10/9/2012 13.40 447 10/10/2012 16.10 448 10/11/2012 <1.0 449 10/12/2012 <1.0 450 10/15/2012 <1.0 451 10/16/2012 1.00 452 10/17/2012 1.00 453 10/22/2012 4.00 454 10/23/2012 2.00 455 10/24/2012 3.00 456 10/29/2012 <1.0 457 10/30/2012 8.50 458 10/31/2012 3.10 459 11/5/2012 <1.0 460 11/6/2012 <1.0 461 11/7/2012 1.00 462 11/12/2012 <1.0 463 11/13/2012 1.00 464 11/14/2012 <1.0 465 11/19/2012 6.30 466 11/20/2012 8.40 467 11 /21 /2012 20.60 468 11/26/2012 <1.0 469 11/27/2012 2.00 470 11/28/2012 13.10 471 12/3/2012 7.20 472 12/4/2012 4.10 473 12/5/2012 7.50 474 12/10/2012 <1.0 475 12/11/2012 6.30 476 12/12/2012 2.00 477 12/17/2012 7.40 478 12/18/2012 7.50 479 12/19/2012 121.00 480 12/26/2012 2420.00 J K L M 481 12/27/2012 2420.00 482 12/28/2012 <1.0 483 484 485 486 487 488 200 489 100 40 30 J E 20 Monthly BOD 10 0 I 0 r CO 0 r L. 2 0 CES 0 r 0 CO Cn Z c^ a) 0 Z Date (1 /1 /2010 to 12/31 /2012 ) / Effluent BOD mg/L (Mo Avg) N 1 C\I M 03 WIMS (NC MAYODAN WWTP) Effluent BOD Monthly MoMaxLimit 50 OEMR. Weekly BOD 40 30 J >) E 20 10 WklyMaxLimit 0 “iAt.1\ 'v'N,AktIA A yli/APL 1/3/10 4/11/10 7/18/10 10/24/10 1/30/11 5/8/11 8/14/11 11/20/11 2/26/12 6/3/12 9/9/12 12/16/12 3/24/13 Week Ending Dates (1 /1 /2010 to 12/31 /2012 ) / Effluent BOD mg/L (Wk Avg) WIMS (NC MAYODAN WWTP) Effluent BOD Weekly O t— c as Monthly TSS O 0 r- N > aCfs 0) Z n 2 Date (111/2010 to 12/31/2012 ) / Effluent TSS mg/L (Mo Avg) CO as WIMS (NC MAYODAN WWTP) Effluent BOD Monthly MoMaxLimit 100 80 60 40 20 Weekly TSS WklyMaxa_imit 0 ! 1/3/10 4/11 /10 7/18/10 10/24/10 1/30/11 5/8/11 8/14/11 11/20/11 2/26/12 6/3/12 9/9/12 12/16/12 3/24/13 Week Ending Dates (111/2010 to 12/31/2012) / Effluent TSS mg/L (Wk Avg) WIMS (NC MAYODAN WWTP) Effluent TSS Weekly 15 10 0 0 0 ✓ r r Monthly Ammonia 0 0 0 T r r r T e- CD 0 C CO Z -3 2 2 CNICNINCNINCNI T r T r r r r — 3 v - m > U) Z - CO Z Date (1/1 /2010 to 12/31 /2012 ) / Effluent NH3 N mg/L (Mo Avg) M cES —3 WIMS (NC MAYODAN WWTP) Effluent Ammonia Monthly 25 20 15 J E 10- 5— Weekly Ammonia 1/3/10 4/11/10 7/18/10 10/24/10 1/30/11 5/8/11 8/14/11 11/20/11 2/26/12 6/3/12 9/9/12 12/16/12 3/24/13 Week Ending Dates (1/1/2010 to 12/31/2012 ) / Effluent NH3 N mg/L (Wk Avg) WIMS (NC MAYODAN WWTP) Effluent Ammonia Weekly 250 200 150 E 0 0 100 Monthly Fecal Coliform 50 0 0 0 0 0 0 c- -3 1 1- r- c- r-- � - N O 2 u) z (3 i to as N > as O > �n Z -3 2 2 z Date (1 /1 /2010 to 12/31 /2012 ) / Effluent Fecal #/100 Mo (Mo Avg) N N N N N N M -3 c WIMS (NC MAYODAN WWTP) Effluent BOD Monthly MoMaxLimit 8000 6000 E a 0 4000 2000 Weekly Fecal Coliform —4 Week Ending Dates (1/112010 to 12/31/2012 / Effluent Fecal #/100 We (Wk Avg) 4 fit- 'I -Ai IA I WIMS (NC MAYQDAN WWTP) Effluent Fecal Coliform Weekly WklyMaxL North Carolina Wildlife Resources Commission Gordon Myers, Executive Director MEMORANDUM TO: Jim McKay, Surface Water Protection Section — Point Source Branch Division of Water Quality FROM: Shari L. Bryant, Piedmont Region Coordinator wit a La Habitat Conservation Program DATE: 6 February 2013 SUBJECT: Draft NPDES Permit for Mayodan Wastewater Treatment Plant, Rockingham County, NPDES Permit No. NC0021873 Biologists with the North Carolina Wildlife Resources Commission have reviewed the subject document. Our comments are provided in accordance with provisions of the Clean Water Act of 1977 (as amended), Fish and Wildlife Coordination Act (48 Stat. 401, as amended; 16 U.S.C. 661-667e), North Carolina General Statutes (G.S. 113-131 et seq.), and North Carolina Administrative Code 15A NCAC 10I.0102. The Town of Mayodan has applied for a renewal of their NPDES permit to continue to operate an existing 4.5 MGD wastewater treatment facility. The facility has effluent limitations and monitoring requirements for 2.5, 3.0, and 4.5 MGD. The 7Q10 is 75 cfs, and the instream waste concentration ranges from 4.9% to 8.5%. Chlorine is used for disinfection, and effluent limitations for ammonia (NH3 as N) vary depending on the discharge amount and season. The monthly average ammonia limits range from 9.0 mg/L to 31.5 mg/L. The weekly average ammonia limits range from 27.0 mg/L to 35.0 mg/L. The wastewater treatment facility discharges to Mayo River, a tributary to Dan River in the Roanoke River Basin. There are records for the federal and state endangered James spinymussel (Pleurobema collina) and Roanoke logperch (Percina rex); the federal species of concern and state endangered green floater (Lasmigona subviridis); the state threatened bigeye jumprock (Moxostoma ariommum); the state special concern notched rainbow (Villosa constricta) and riverweed darter (Etheostoma podostemone); and the state significantly rare Roanoke hogsucker (Hypentelium roanokense) in Mayo River. Also the Significant Natural Heritage Area — Mayo River Aquatic Habitat — is located in this section of the Mayo River. Chlorine is acutely toxic and can form secondary compounds that are detrimental to aquatic life. Valenti (2006) concluded the impact of long term exposure to low doses of chlorine may impact juvenile mussels and reduce the chance of them being recruited to the reproducing population. Also, fish and mussel species are very sensitive to ammonia. Dwyer et al. (2005) found that Cape Fear shiners, a federal endangered fish species, had an IC25 of 8.8 mg/L for ammonia. An IC25 is the level at which an organism exhibited a 25 percent reduction in a biological measurement such as reproduction or growth after a 7-day Mailing Address: Division of Inland Fisheries • 1721 Mail Service Center • Raleigh, NC 27699-1721 Telephone: (919) 707-0220 • Fax: (919) 707-0028 Page 2 6 February 2013 Mayodan WWTP NPDES Permit No. NC0021873 exposure. Augspurger et al. (2003) found that ammonia concentrations which may be protective of freshwater mussels range from 0.3 to 1.0 mg/L total ammonia as N at pH 8. We reviewed EPA's Enforcement and Compliance History Online (ECHO) for this facility and it showed: • From July 2009 to June 2012 the total residual chlorine was measured at 0 µg/L. • From July 2009 to June 2012 the total ammonia nitrogen (as N) ranged from a minimum of 0 mg/L to a maximum of 24.1 mg/L. The average total ammonia nitrogen (as N) ranged from 0.15 mg/L to 14.35 mg/L. We recognize the discharge is relatively small, and is located near the confluence of Dan River. However, the Mayo River supports several federal and state listed species, and several listed species including the Roanoke logperch have been documented in Dan River. Therefore, it is imperative the facility operates effectively to prevent excessive discharge of pollutants, particularly chlorine and ammonia. Should the permit be renewed, we offer the following recommendations to minimize impacts to aquatic resources. 1. While it appears the facility is not discharging chlorine, we encourage the applicant to consider replacing chlorine disinfection systems with ultraviolet light or ozone systems to eliminate the potential for chlorine to be discharged. 2. Develop site -specific acute (short-term) and chronic (long-term) water quality standards for ammonia to protect rare and sensitive mussel species, particularly James spinymussel in Mayo River. The site specific standard should be developed using the process described in Appendix A of the Technical Support Document for Consideration of Federally -listed Threatened or Endangered Aquatic Species in Water Quality Management Planning for the Goose Creek Watershed. Please contact Tom Augspurger with the U.S. Fish and Wildlife Service at (919) 856-4520 for additional information on developing a site -specific standard. Thank you for the opportunity to comment on this permit renewal. If we can be of further assistance, please contact our office at (336) 449-7625 or shari.bryant@ncwildlife.org. Literature cited Augspurger, T., A. E. Keller, M. C. Black, W. G. Cope, and F. J. Dwyer. 2003. Derivation of water quality guidance for protection of freshwater mussels (Unionidae) from ammonia exposure. Environmental Toxicology and Chemistry 22(11):2569-2575. Dwyer, F.J., D.K. Hardesty, C.E. Henke, C.G. Ingersoll, D.W. Whites, T. Augspurger, T.J. Canfield, D.R. Mount, and F.L. Mayer. 2005. Assessing Contaminant Sensitivity of Endangered and Threatened Aquatic Species: Part III. Effluent Toxicity Tests. Archives of Environmental Contamination and Toxicology 48:174-183. Valenti, T.W., D.S. Cherry, R.J. Currie, R.J. Neves, J.W. Jones, R. Mair, and C.M. Kane. 2006. Chlorine toxicity to early life stages of freshwater mussels (Bivalvia: Unionidae). Environmental Toxicology and Chemistry, 25(9):2512-2518. ec: Rob Nichols, NCWRC Tom Augspurger, USFWS Sarah McRae, USFWS NC0021873 Ammonia-N predicted Instream Concentrations, Mayo WWTP 2010 - October 2012 Based on DMR Data and 7Q10 Flows Monthly Calculated Avg. Monthly Avg. Ammonia-N Ammonia-N Ammonia-N Monthly Avg. Effluent Effluent In -Stream In -Stream Discharge Limit, Effluent Flow Flow Ammonia-N 7Q10 Concentration Standard (Monthly Avg.) Date MGD cfs mg/ L cfs mg/ L mg/ L mg/ L Jan-10 1.487 2.30 1.12 131 0.24 1.8 Feb-10 1.792 2.78 0.51 131 0.23 1.8 Mar-10 1.368 2.12 0.60 131 0.23 1.8 Apr-10 1.063 1.65 4.50 75 0.31 1.0 16 May-10 0.803 1.24 14.35 75 0.45 1.0 16 Jun-10 0.724 1.12 10.47 75 0.37 1.0 16 Jul-10 0.751 1.16 0.28 75 0.22 1.0 16 Aug-10 0.959 1.49 0.23 75 0.22 1.0 16 Sep-10 0.848 1.31 0.71 75 0.23 1.0 16 Oct-10 1.216 1.88 1.31 75 0.25 1.0 16 Nov-10 0.898 1.39 0.51 131 0.22 1.8 Dec-10 1.04 1.61 1.34 131 0.23 1.8 Jan-11 0.884 1.37 1.22 131 0.23 1.8 Feb-11 0.847 1.31 0.23 131 0.22 1.8 Mar-11 1.393 2.16 1.41 131 0.24 1.8 Apr-11 1.108 1.72 1.98 75 0.26 1.0 16 May-11 1.092 1.69 1.35 75 0.24 1.0 16 Jun-11 0.797 1.24 0.30 75 0.22 1.0 16 Jul-11 0.722 1.12 0.22 75 0.22 1.0 16 Aug-11 0.702 1.09 0.77 75 0.23 1.0 16 Sep-11 0.776 1.20 1.96 75 0.25 1.0 16 Oct-11 0.786 1.22 0.32 75 0.22 1.0 16 Nov-11 0.98 1.52 2.28 131 0.24 1.8 Dec-11 0.91 1.41 0.86 131 0.23 1.8 Jan-12 0.911 1.41 0.11 131 0.22 1.8 Feb-12 0.787 1.22 0.83 131 0.23 1.8 Mar-12 1.181 1.83 0.30 131 0.22 1.8 Apr-12 0.921 1.43 1.32 75 0.24 1.0 16 May-12 0.811 1.26 0.50 75 0.22 1.0 16 Jun-12 0.653 1.01 0.34 75 0.22 1.0 16 Jul-12 0.66 1.02 0.36 75 0.22 1.0 16 Aug-12 0.794 1.23 1.04 75 0.23 1.0 16 Sep-12 0.753 1.17 0.23 75 0.22 1.0 16 Oct-12 0.758 1.17 1.11 75 0.23 1.0 16 0.24 Average 0.45 Maximum 0.22 Minimum Mckay, James From: Taylor -Smith, Aana Sent: Monday, June 17, 2013 7:30 AM To: Mckay, James Subject: RE: NCoo21873 - Mayodan WWTP Attachments:. Mayodan WWTP Inspection Letter.pdf Hi James, Sorry about that I took a half day on Friday. I have attached a copy of the inspection report for the CEI conducted 4/17/2013. All necessary repairs/maintenance noted in the letter were completed shortly after the inspection. Let me know if there's anything else I can do for you! T� Thanks! Aana Taylor -Smith Surface Water Protection Section Winston-Salem Regional Office Division of Water Quality Phone: (336) 771-4950 Fax (336) 771-4630 E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties. From: Mckay, James Sent: Friday, June 14, 2013 2:58 PM To: Taylor -Smith, Aana Subject: NCoo21873 - Mayodan WWTP Anna: I am working on renewal of this permit. Per BIMS, you did the most recent compliance review of the facility in April of this year. Would you please send me a copy of your inspection report? BIMS only refers to your report which covers the WWTP and I think, a stormwater permit - I can't find the actual report. Thank you! Jim McKay, Environmental Engineer NC DENR / Division of Water Quality / Surface Water Protection Section Point Source Branch 1617 Mail Service Center, Raleigh, NC 27699-1617 919/807-6404 (work); 919/807-6489 (fax) **Please note, my email address has changed to James.McKay@ncdenr.gov E-mail correspondence to and from this address may be subject to the North Carolina Public Records law and may be disclosed to third parties. 1 From: Bryant, Shari L. Sent: Wednesday, February 06, 2013 12:43 PM To: Mckay, James Subject: RE: NC0021873 Mayodan WWTP Attachments: NC0021873 Mayodan WWTP_NCWRC.pdf Jim, Thank you for sending me the draft file. Please find attached our comments. Shari Bryant N.C. Wildlife Resources Commission P.O. Box 129 Sedalia, NC 27342-0129 336.449.7625 shari.brvant@ncwildlife.org Get NC Wildlife Update -- news including season dates, bag limits, legislative updates and more -- delivered to your Inbox from the N.C. Wildlife Resources Commission. From: Mckay, James Sent: Tuesday, January 29, 2013 8:26 AM To: Bryant, Shari L. Subject: FW: NC0021873 Mayodan WWTP Shari, Please see the attached draft file. It went out to notice on January 16, I do not know when it was published in the newspaper, but the 30 day public notice clock starts with the publication date. Please send me any questions or comments. Thank you, Jim McKay, Environmental Engineer NC DENR / Division of Water Quality / Surface Water Protection Section Point Source Branch 1617 Mail Service Center, Raleigh, NC 27699-1617 919/807-6404 (work); 919/807-6489 (fax) **Please note, my email address has changed to James.McKay@ncdenr.gov E-mail correspondence to and from this address may be subject to the North Carolina Public Records law and may be disclosed to third parties. From: Bryant, Shari L. Sent: Monday, January 28, 2013 3:58 PM To: Mckay, James Subject: NC0021873 Mayodan WWTP file://E:1NC00218731RE NC0021873 Mayodan WWTP .htm Jim, Could you please forward a copy of the draft permit for the Mayodan WWTP (NC0021873)? An electronic copy is fine. Thanks. Shari Bryant N.C. Wildlife Resources Commission P.O. Box 129 Sedalia, NC 27342-0129 336.449.7625 shari.bryant@ncwildlife.org Get NC Wildlife Update -- news including season dates, bag limits, legislative updates and more -- delivered to your Inbox from the N.C. Wildlife Resources Commission. Email correspondence to and from this sender is subject to the N.C. Public Records Law and may be disclosed to third parties. file://E:1N000218731RE NC0021873 Mayodan WWTP .htm Mkt ittetbsuillt &rui ui EDEN DAILY NEws The Messenger Advertising Affidavit NCDENR/DWQ/POINT SOURCE BRANCH 1617 MAIL SERVICE CENTER RALEIGH, NC 27699-1617 P.O. Box 2157 Reidsville, NC 27323-2157 (336) 349-4331 Account Number 3390343 Date January 20, 2013 Date Category Description Ad Size 01/20/2013 Legal Notices Public Notice 1 x 32 L Public Notice North Carolina Environmental Management Commission/NPDES lint 1617 Mali Service Center Raleigh, NC 27699-1617 Notice of Intent to Issue a NPDES Wastewater Permit The North Carolina Environmental Manage- ment Commission proposes to issue a NPDES wastewater discharge permit to the person(s) listed below. Written comments regarding the proposed permit will be accepted until 30 days after the publish date of this notice. The Direc- tor of the NC Division of Water Quality (DWQ) may hold a public hearing should there be a sig- nificant degree of public interest Please mail comments and/or information requests to DWQ at the above address. Interested persons may visit the DWQ at 512 N. Salisbury Street, Raleigh, NC to review information on file. Addi- tional information on NPDES permits and this notice may be found on our website• J/por tal.ncdenr.org//web/wq/swp/ps/npde calend ar, or by caiDn (919) 807-6390. Mayodan re- quested renewal In Rockingham Coounttyy. this fa- cility discharge is treated wastewater to Mayo River, Roanoke River Basin. Publisher of the Reidsville Rev This is to certify that the attached Public Notice was published by the Reidsville Rev in the State of North Carolina, on the following dates: 01/20/2013 The First insertion being given ... 01/20/2013 Newspaper reference: 0002883360 Sworn to and subscribed before me this sc)- Liantla&f c9O13 Notary Public / Supervis'. r State of My Commission expires SARAH D. GENTRY Notary Public Commonwealth of Virginia Reg. #3206z3 My Commission Expires 1 �� THIS IS NOT A BILL. PLEASE PAY FROM INVOICE. THANK YOU NPDES/Aquifer Protection Permitting Unit Pretreatment Information Request Form PERMIT WRITER COMPLETES THIS PART: PERMIT WRITERS - AFTER you get this form back from PERCS: Check all that apply - Notify PERCS if LTMP/STMP data we said should Date of Request 5-Jun-12 municipal renewal X be on DMRs is not really there, so we can get it for Requestor Jim McKay new industries you (or NOV POTW). Facility Name Mayodan, town of WWTP expansion - Notify PERCS if you want us to keep a specific Permit Number NC0021873 Speculative limits POC in LTMP/STMP so you will have data for next renewal. Region W-SRO stream reclass. permit - Email PERCS draft permit, fact sheet, RPA. Basin Roanoke stream relocation - Send PERCS paper copy of permit (w/o NPDES 7Q10 change boilerplate), cover letter, final fact sheet. Email RPA other if changes. other check a plicable PERCS staff: Other Comments to PERCS: X...I need information on Sills and GillsHIW, LTN, NEU, YAD, ROA - Monti Hassan (371) BRD, CPF, FRB, TAR - Sarah Morrison (208) PERCS Status of PRETREATMENT STAFF COMPLETES THIS PART: Pretreatment Program (check all that apply) 1) facility has no SIU's, does have Division approved Pretreatment Program that is INACTIVE 2) facility has no SIU's, does not have Division approved Pretreatment Program 3) facili ' :.-s Sills and DWQ approved Pretreatment Program (list "DEN.'" if program still under development) f t) u/ 3a) '. rogram with LTMP 3b) odified Program with STMP 4) additional conditions regarding Pretreatment attached or listed below _ STMP time frame: Most recent: Flow, MGD Permitted Actual Time eriod for Actual Next Cycle: Industrial 0.2t 0 (1-1 V011 Uncontrollable nla POC in LIMP/ STMP Parameter of Concern (POC) Check List POC due to NPDES/ Non- Disch Permit Limit Required by EPA* Required by 603 Sludge** POC due to SIU*** POTW POC (Explain below)'"'** STMP Effluent Freq IMP ent req 1/ BOD 1/ ✓. 4 Q M V TSS ✓ V 4 Q M Q Quarterly V NH3 1� 4 QM M= o Arsenic 1/ 4 Q M 4 Cadmium 4 V 4 Q M 4 Chromium q 4 Q M 4 Copper 4 ✓ 4 Q M Cyanide 4 Q M all data on DMRs? 4 Lead / V q. ✓ 4 Q M YES Mercury V ,/ 4 Q M NO (attach data) V Molybdenum '✓ _ 4 Q M 4 Nickel 4 ✓ 4 Q M Silver 4 Q M Selenium ✓ V/ 4 Q M 4 Zinc 4 V 4 Q M data in spreadsheet? Total Nitrogen 4 Q M YES (email to writer) Phosphorus 4 Q M NO 4 Q M 4 Q M 4 Q M 4 Q M *Always in the LTMP/STMP ** Only in LTMP/STMP if sludge land app or composte (dif POCs for incinerators) *** Only in LTMP/STMP while SIU still discharges to POTW **** Only in LTMP/STMP when pollutant is still of concem to POTW Comments to Permit Writer (ex.. explanation of any POCs: Info you have on IU related investigations into NPDES problems): , Rtdj 11 UPI r Ctt . c A ITT I I%In Ok t►. 4% E LrU ilk a--,- Ohl fit ti_ To is 144-- w.f._ . inn If. (.11111 Pretreatment request fOrmlls Revised: July 24, 2007 ROANOKE RIVER BASIN: UPPER DAN RIVER SUBBASIN (HUC 03010103) S301ON3ddV NC 2010 Integrated Report All 13,123 Waters in NC are in Category 5-303(d) List for Mercury due to statewide fish consumption advice for several fish species AU_Number Category Parameter AU_Name AU_Description LengthArea AU_Units Classification Reason Ihr Rating Use Category Collection Year 303(d)ycar Roanoke River Basin Matrimony Creek -Dan River Watershed 0301010305 0 22-30-(10) Mayo River From dam at Mayodan Water Supply Intake 2.4 FW Miles C to Dan River 1 Ecological/biological Integrity Benthos Good -Fair Bioclassification Aquatic Life 1999 Q 22-34-(2) Rock House Creek From Rockingham Countly SR 2381 to Dan 6.5 FW Miles WS-IV River 1 EcologicaUbiological Integrity Benthos Good -Fair Bioclassilication Aquatic Life 2001 1 Ecological/biological Integrity FishCom Good Bioclassification Aquatic Life 2004 Roanoke River Basin Lower Smith River Watershed 0301010308 Q 22-40-(1) Smith River 5 Copper From North Carolina -Virginia State Line to a point 0.8 mile downstream of Rockingham County SR 1714 (Aiken Road) 2.8 FW Miles WS-IV Standard Violation Aquatic Life 2008 2008 4s Ecological/biological Integrity Benthos Fair Bioclassification Aquatic Life 1999 2008 4t Fecal Coliform (recreation) Standard Violation Recreation 2008 2008 1 Water Quality Standards Water Supply No Criteria Exceeded Water Supply 2008 C) 22-40-(2.5) Smith River 5 Copper From a point 0.8 mile downstream of Rockingham County SR 1714 (Aiken Road) to Fieldcrest Mills Water Supply Intake 0.5 FW Miles WS-IV;CA Standard Violation Aquatic Life 2008 2008 4s Ecological/biological Integrity Benthos Fair Bioclassification Aquatic Life 1999 2008 4t Fecal Coliform (recreation) Standard Violation Recreation 2008 2008 1 Water Quality Standards Water Supply No Criteria Exceeded Water Supply 2008 Roanoke River Basin Cascade Creek -Dan River Watershed 0301010309 • 22-48-4 Birch Fork From source to Wolf Island Creek 8.4 FW Miles C 1 Ecological/biological integrity Benthos Not Impaired Bioclassification Aquatic Life 2007 Q 22-(39)a DAN RIVER (North Carolina portion) 4t Fecal Coliform (recreation) From Mill Branch to NC/VA crossing 13.8 FW Miles C downstream of Wolf Island Creek Standard Violation Recreation 2008 2008 5 Turbidity Standard Violation Aquatic Life 2008 2008 Q 22-40-(3) Smith River 5 Copper From Fieldcrest Mills Water Supply Intake 1.8 FW Miles C to Dan River Standard Violation Aquatic Life 2008 2008 4s Ecological/biological integrity Benthos Fair Bioclassification Aquatic Life 1999 2008 4t Fecal Coliform (recreation) Standard Violation Recreation 2008 2008 1-A.6 QJlckay, James To: Subject: Thank you! Mickey, Mike RE: Draft of NPDES permit NC0021873 - Town of Mayodan WWTP Jim McKay, Environmental Engineer NC DENR / Division of Water Quality / Surface Water Protection Section Point Source Branch 1617 Mail Service Center, Raleigh, NC 27699-1617 919/807-6404 (work); 919/807-6489 (fax) **Please note, my email address has changed to James.McKay@ncdenr.gov E-mail correspondence to and from this address may be subject to the North Carolina Public Records law and may be disclosed to third parties. From: Mickey, Mike Sent: Monday, January 14, 2013 10:08 AM To: Mckay, James Cc: Taylor -Smith, Aana Subject: RE: Draft of NPDES permit NC0021873 - Town of Mayodan WWTP James — The draft permit has been reviewed. No corrections or typos noted. Send it on. Mike. Mike Mickey Mike.Mickev@NCDENR.gov NC Division of Water Quality 585 Waughtown Street Winston-Salem, NC 27107 Phone: (336) 771-4962 FAX: (336) 771-4630 E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties. From: Mckay, James Sent: Friday, January 11, 2013 12:44 PM To: Basinger, Corey; Meadows, Susan; Reid, Steve Cc: fkcunninghamOdeq.virginia.gov Subject: Draft of NPDES permit NC0021873 - Town of Mayodan WWTP Attached is a copy of the draft renewal permit for the Town of Mayodan WWTP. It should go out to public notice and comment period next Wednesday. Please send any questions or comments to me. Thanks, 1 Jim McKay, Environmental Engineer NC DENR / Division of Water Quality / Surface Water Protection Section Point Source Branch 1617 Mail Service Center, Raleigh, NC 27699-1617 919/807-6404 (work); 919/807-6489 (fax) **Please note, my email address has changed to James.McKay@ncdenr.gov E-mail correspondence to and from this address may be subject to the North Carolina Public Records law and may be disclosed to third parties. 2 TOWN OF MAYODAN 210 W. MAIN STREET • MAYODAN, N. C. 27027 • (910) 427-0241 FAX (910) 427-7592 December 23, 2011 NCDENR/DWQ NPDES Unit 1617 Mail Service Center Raleigh, NC 27699-1617 RE: NC0021873 Dear Mr. Weaver, Enclosed is the permit renewal application for the Town of Mayodan WWTP. If you have any questions, please advise. Sincerely, Town of Mayodan ._ (L. C.c,„,LAL, Debra Cardwell Town Manager 0 EgEDWR R ig DEC 19 2011 DENR-WATER QUALITY POINT SOURCE BRANCH FACILITY NAME AND PERMIT NUMBER: Mayodan WWTP , NC0021873 PERMIT ACTION REQUESTED: Renewal RIVER BASIN: Ronoake SUPPLEMENTAL APPLICATION INFORMATION PART F. INDUSTRIAL USER DISCHARGES AND RCRA/CERCLA WASTES All treatment works receiving discharges complete part F. GENERAL INFORMATION: F.1. Pretreatment program. Does the treatment ® Yes ❑ No F.2. Number of Significant Industrial Users industrial users that discharge to the a. Number of non -categorical Sills. b. Number of CIUs. SIGNIFICANT INDUSTRIAL USER Supply the following information for each provide the information requested for each from significant industrial users or which receive RCRA,CERCLA, or other remedial wastes must works have, or is subject ot, an approved pretreatment program? (SIUs) and Categorical Industrial Users (Gills). Provide the number treatment works. 2 of each of the following types of 0 INFORMATION: SIU. If more than one SIU SIU. discharges to the treatment works, copy questions F.3 through F.8 and F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages as necessary. Name: Unifi Sans Mailing Address: PO Box 1437 Reidsville, NC 27323 F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge. Melting and extruding nylon chip into fiber F.5. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's discharge. Principal product(s): Spun nylon fiber Raw material(s): Nylon 6, 6 chip, 10-12% mineral oil, heat transfer mediums F.6. Flow Rate. a. Process wastewater flow rate. Indicate the average daily volume day (gpd) and whether the discharge is continuous or intermittent. 0.0234 gpd ( X continuous volume following: subcategory? of process wastewater discharge into or intermittent) the collection system in gallons per into the collection system b. Non -process wastewater flow rate. Indicate the average daily in gallons per day (gpd) and whether the discharge is continuous gpd ( continuous of non -process wastewater flow discharged or intermittent. or intermittent) F.7. Pretreatment Standards. Indicate whether the SIU is subject to the a. Local limits ® Yes b. Categorical pretreatment standards ❑ Yes If subject to categorical pretreatment standards, which category and 0 No ® No NPDES FORM 2A Additional Information FACILITY NAME AND PERMIT NUMBER: Mayodan WWTP , NC0021873 PERMIT ACTION REQUESTED: Renewal RIVER BASIN: Ronoake F.8. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g., upsets, interference) at the treatment works in the past three years? ❑ Yes ® No If yes, describe each episode. RCRA HAZARDOUS WASTE RECEIVED BY TRUCK, RAIL, OR DEDICATED PIPELINE: F.9. RCRA Waste. Does the treatment works receive or has it in the past three years received RCRA hazardous waste by truck, rail or dedicated pipe? ❑ Yes El No (go to F.12) F.10. Waste transport. Method by which RCRA waste is received (check all that apply): 0 Truck ❑ Rail ❑ Dedicated Pipe F.11. Waste Description. Give EPA hazardous waste number and amount (volume or mass, specify units). EPA Hazardous Waste Number Amount Units CERCLA (SUPERFUND) WASTEWATER, RCRA REMEDIATIONICORRECTIVE ACTION WASTEWATER, AND OTHER REMEDIAL ACTIVITY WASTEWATER: F.12. Remediation Waste. Does the treatment works currently (or has it been notified that it will) receive waste from remedial activities? ❑ Yes (complete F.13 through F.15.) ® No F.13. Waste Origin. Describe the site and type of facility at which the CERCLA/RCRA/or other remedial waste originates (or is excepted to origniate in the next five years). F.14. Pollutants. List the hazardous constituents that are received (or are expected to be received). Include data on volume and concentration, if known. (Attach additional sheets if necessary.) F.15. Waste Treatment. a. Is this waste treated (or will be treated) prior to entering the treatment works? ❑ Yes ® No If yes, describe the treatment (provide information about the removal efficiency): b. Is the discharge (or will the discharge be) continuous or intermittent? ❑ Continuous 0 Intermittent If intermittent, describe discharge schedule. END OF PART F. REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS OF FORM 2A YOU MUST COMPLETE NPDES FORM 2A Additional Information FACILITY NAME AND PERMIT NUMBER: Mayodan WWTP , NC0021873 PERMIT ACTION REQUESTED: Renewal RIVER BASIN: Ronoake SUPPLEMENTAL APPLICATION INFORMATION PART F.INDUSTRIAL USER DISCHARGES AND RCRA/CERCLA WASTES All treatment works receiving discharges from significant industrial users or which receive RCRA,CERCLA, or other remedial wastes must complete part F. GENERAL INFORMATION: F.1. Pretreatment program. Does the treatment works have, or is subject ot, an approved pretreatment program? ® Yes ❑ No F.2. Number of Significant Industrial Users (SIUs) and Categorical Industrial Users (ClUs). Provide the number of each of the following types of industrial users that discharge to the treatment works. c. Number of non -categorical SIUs. 4 d. Number of CIUs. 0 SIGNIFICANT INDUSTRIAL USER INFORMATION: Supply the following information for each SIU. If more than one SIU discharges to the treatment works, copy questions F.3 through F.8 and provide the information requested for each SIU. F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages as necessary. Name: Unifi 105 Mailing Address: PO Box 1437 Reidsville, NC 27323 F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge. Texturing and covering nyoln fiber F.5. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's discharge. Principal product(s): Textured and covered nylon fiber Raw material(s): Nylon fiber, coning oil, light mineral oil F.6. Flow Rate. c. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per day (gpd) and whether the discharge is continuous or intermittent. 0.1030 gpd ( X continuous or intermittent) d. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system in gallons per day (gpd) and whether the discharge is continuous or intermittent. gpd ( continuous or intermittent) F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following: a. Local limits El Yes ❑ No b. Categorical pretreatment standards ❑ Yes El No If subject to categorical pretreatment standards, which category and subcategory? NPDES FORM 2A Additional Information ¶ACILITY NAME AND PERMIT NUMBER: Mayodan WWTP , NC0021873 PERMIT ACTION REQUESTED: Renewal RIVER BASIN: Ronoake F.8. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g., upsets, interference) at the treatment works in the past three years? ❑ Yes ® No If yes, describe each episode. RCRA HAZARDOUS WASTE RECEIVED BY TRUCK, RAIL, OR DEDICATED PIPELINE: F.9. RCRA Waste. Does the treatment works receive or has it in the past three years received RCRA hazardous waste by truck, rail or dedicated pipe? ❑ Yes ® No (go to F.12) F.10. Waste transport. Method by which RCRA waste is received (check all that apply): 0 Truck 0 Rail 0 Dedicated Pipe F.11. Waste Description. Give EPA hazardous waste number and amount (volume or mass, specify units). EPA Hazardous Waste Number Amount Units CERCLA (SUPERFUND) WASTEWATER, RCRA REMEDIATION/CORRECTIVE ACTION WASTEWATER, AND OTHER REMEDIAL ACTIVITY WASTEWATER: F.12. Remediation Waste. Does the treatment works currently (or has it been notified that it will) receive waste from remedial activities? ❑ Yes (complete F.13 through F.15.) ® No F.13. Waste Origin. Describe the site and type of facility at which the CERCLA/RCRA/or other remedial waste originates (or is excepted to origniate in the next five years). F.14. Pollutants. List the hazardous constituents that are received (or are expected to be received). Include data on volume and concentration, if known. (Attach additional sheets if necessary.) F.15. Waste Treatment. c. Is this waste treated (or will be treated) prior to entering the treatment works? ❑ Yes EI No If yes, describe the treatment (provide information about the removal efficiency): d. Is the discharge (or will the discharge be) continuous or intermittent? ❑ Continuous ❑ Intermittent If intermittent, describe discharge schedule. END OF PART F. REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS OF FORM 2A YOU MUST COMPLETE NPDES FORM 2A Additional Information Bureau of Labor Statistics Data Page 1 of 1 Home I Subject Areas Databases & Tools A to Z Index I FAQs I About BLS I Contact Us Subscribe to E-mail Updates GO What's New I Release Calendar I Site Map Search BLS.gov Publications I Economic Releases I Beta Databases, Tables & Calculators by Subject Change Output Options: From: 2001 To: 2011 , ❑ include graphs Data extracted on: December 12, 2011 (3:14:21 PM) Producer Price Index -Commodities Series Id: WPU06130217 Not Seasonally Adjusted Group: Chemicals and allied products Item: Potassium & sodium compounds, ex. bleaches Base Date: 200106 Down oad: J More Formatting Optionsy Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual 2001 100.0 101.1 99.2 99.3 99.1 99.1 97.7 2002 99.8 97.9 99.7 99.0 98.3 98.9 97.0 97.8 97.9 97.8 98.1 97.5 98.3 2003 97.5 98.3 96.5 97.9 98.8 99.8 98.4 96.4 97.6 98.2 96.8 96.6 97.7 2004 95.9 97.7 99.6 99.6 99.3 100.0 99.7 99.7 101.1 100.9 102.7 104.3 100.1 2005 104.3 105.6 105.1 108.9 110.6 109.8 112.0 113.4 114.3 117.0 122.7 119.9 112.0 2006 121.6 129.6 130.2 135.9 135.6 135.2 139.0 133.6 137.2 135.1 135.6 139.4 134.0 2007 135.6 134.8 134.4 135.4 137.3 135.4 141.8 ' 137.7 151.5 140.9 133.5 133.5 137.6 2008 154.3 154.1 171.1 173.6 170.4 188.9 201.4 227.6 251.3 258.1 252.1 293.7 208.1 2009 294.8 289.7 295.0 285.2 282.0 277.8 276.4 261.2 263.6 264.9 264.5 260.9 276.3 2010 249.5 250.9 250.2 253.5 254.0 252.3 250.1 249.6 251.6 249.8 259.5 256.0 252.2 2011 262.9 269.8 268.3 272.7 275.3 276.8 274.9(P) 276.8(P) 278.3(P) 280.8(P) P : Preliminary. All indexes are subject to revision four months after original publication. 4 FONT SIZE: Q C] TOOLS CALCULATORS HELP INFO RESOURCES Areas at a Glance Inflation Help & Tutorials What's New Inspector General (OIG) Industries at a Glance Location Quotient FAQs Careers @ BLS Budget and Performance Economic Releases Injury And Illness Glossary Find It! DOL No Fear Act Databases & Tables About BLS Join our Mailing Lists USA.gov Maps Contact Us Linking & Copyright Info Benefits.gov Disability.gov Freedom of Information Act 1 Privacy & Security Statement 1 Disclaimers I Customer Survey 1 Important Web Site Notices U.S. Bureau of Labor Statistics I Postal Square Building, 2 Massachusetts Avenue, NE Washington, DC 20212-0001 www.bls.00v I Telephone: 1-202-691-5200 I TDD: 1-800-877-8339 I Contact Us http://data.bls.gov/cgi-bin/dsry 12/12/2011 c Town of Mayodan NPDES Permit NC0021873 SLUDGE MANAGEMENT PLAN The Town of Mayodan WWTP thickens sludge in one of two gravity thickeners and then it is digested in an aerobic digester with the capacity of 0.4 MGD. The stabilized sludge is then land applied either as a liquid directly from the digester or it may be dewatered on one of the 10 sand drying beds and then land applied. The Land Application Permit (WQ0002672), permits a total of 197.6 acres. Town of Mayodan NPDES Permit NC0021873 Present Operating Status The Town of Mayodan Wastewater Treatment Plant is a 3.0 MGD design capacity facility. The facility treats a combination of domestic and commercial wastewaters. The current treatment scheme includes a mechanical bar screen, grit removal system, activated sludge and secondary clarification. The treated effluent is disinfected by chlorination followed by a dechlorination through the use of Sulfur Dioxide. Following is a schematic of the existing wastewater treatment plant. The volumetric capacities are noted on the schematic. ATTACHMENT II SCHEMATIC AND BRIEF NARRITIVE The Town of Mayodan Wastewater Treatment Plant is a 4.5 MGD design capacity facility. The facility treats a combination of domestic, industrial, and commercial wastewaters. The current treatment scheme includes a mechanical bar screen, grit removal system, activated sludge and secondary clarification. The treated effluent is disinfected by chlorination followed by dechlorination through the use of sulfur dioxide. —I#ent Bar been In uent Pump Station Infiu from Unifi Aeratio i Basins 1.25 MGD Total Clarifier I.0.143 MG co Sludge Pumping BuJding Control Building Waste. Sludge .. . . Return Sludge Clarifier 0.143 MG SO2 Bldg Sludge Thickeners Flow Meter 4 (Digestor 0.400 MG 4-- Cl2 SO2 Waste Sludge —Bldg- Chlorine Contact # 3 Aeration Basin 1.75 MGD 4- Chlorine Contact # 2 -* Aeration Basin 1.5 MGD Clarifier 0.400 MG Clarifier 0.400 MG Digestor 0.400 MG