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HomeMy WebLinkAboutNC0021211_Permit Modification_20061020OF WATER `off PG � r Mr. Victor R. Quick Utilities Director, City of Graham P.O. Box 357 Graham, North Carolina 27253 Dear Mr. Quick: Michael F. Easley Governor William G. Ross, Jr., Secretary North Carolina Department of Environment and Natural Resources Alan W. Klimek, P.E., Director Division of Water Quality October 20, 2006 Subject: Modification of NPDES Permit Permit No. NCO021211 City of Graham WWTP Alamance County As agreed upon in the settlement of contested Case 06 EHR 1115, the Division of Water Quality is hereby forwarding the revised permit. The permit was modified to reduce the monitoring frequency for Total Nitrogen, TKN, NOs-N + NO2-N, and Total Phosphorus to weekly. If any parts, measurement frequencies or sampling requirements contained in this permit are unacceptable to you, you have the right to an adjudicatory hearing upon written request within thirty (30) days following receipt of this letter. This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings (6714 Mail Service Center, Raleigh, North Carolina 27699-6714). Unless such demand is made, this decision shall be final and binding. Please note that this permit is not transferable except after notice to the Division. The Division may require modification or revocation and reissuance of the permit. This permit does not affect the legal requirements to obtain other permits which may be required by the Division of Water Quality or permits required by the Division of Land Resources, the Coastal Area Management Act or any other Federal or Local governmental permit that may be required. If you have any questions concerning this permit, please contact Teresa Rodriguez at telephone number (919) 733-5083, extension 553. Sincerely, Alan W. Klimek, P.E. Cc: NPDES Files Central Files US EPA Region 4 Raleigh Regional Office Aquatic Toxicology Unit North Carolina Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 Phone (919) 733-5083 Intemet: h2o.enr.state.nc.us 512 N. Salisbury St. Raleigh, NC 27604 FAX (919) 733-0719 An Equal Opportunity/Affirmative Action Employer — 50% Recycled/10% Post Consumer Paper Noi` Carolina mr,711Y Customer Service 1-877-623-6748 Permit NCO021211 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 In compliance with the provision of North Carolina General Statute 143-215.1, other lawful standards and regulations promulgated and adopted by the North Carolina Environmental Management Commission, and the Federal Water Pollution Control Act, as amended, the City of Graham is hereby authorized to discharge wastewater from a facility located at the Graham WWTP 1204 East Gilbreath St. Alamance County to receiving waters designated as the Haw River in the Cape Fear River Basin in accordance with effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, III and IV hereof. This permit shall become effective December 1, 2006. This permit and authorization to discharge shall expire at midnight on May 31, 2011. Signed this day October 20, 2006. Alan W. Klimek, P.E., Director Division of Water Quality By Authority of the Environmental Management Commission Permit NCO021211 SUPPLEMENT TO PERMIT COVER SHEET All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby revoked. As of this permit issuance, any previously issued permit bearing this number is no longer effective. Therefore, the exclusive authority to operate and discharge from this facility arises under the permit conditions, requirements, terms, and provisions included herein. The City of Graham is hereby authorized to: 1. Continue to operate an existing 3.5 consisting of the following components: ➢ Mechanical bar screen ➢ Grit chambers ➢ Primary clarifiers ➢ Extended aeration basin ➢ Final clarifiers ➢ Aerobic digesters ➢ Chlorination ➢ Sand filters ➢ Post aeration MGD wastewater treatment facility ➢ Lime stabilization unit ➢ Sludge storage This facility is located at the Graham Wastewater Treatment Plant on 1204 East Gilbreath St., Graham, in Alamance County. 2. Discharge from said treatment works at the location specified on the attached map into the Haw River, classified C-NSW waters in the Cape Fear River Basin. Permit NCO021211 A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS During the period on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge from outfall 001. Such discharges shall be limited and monitored by the Permittee as specified below: EFFLUENT LIMITS MONITORING REQUIREMENTS Monthly Weekly Daily Measurement Sample Sample Location CHARACTERISTICS Average Average Maximum Frequency' T e Flow 3.5 MGD Continuous Recording Influent or Effluent Total Monthly Flow Monthly Recorded or calculated Influent or Effluent BOD, 5 day, 20°C (April 1 through October 31 2 12.0 mg/L 18.0 mg/L Daily Composite Influent and Effluent BOD, 5 day, 20°C 2 November 1 through March 31 24.0 mg/L 36.0 mg/L Daily Composite Influent and Effluent Total Suspended Solids 2 30.0 mg/L 45.0 mg/L Daily Composite Influent and Effluent NH3 as N (April 1 through October 31 4.0 mg/L 12.0 mg/L Daily Composite Effluent NH3 as N November 1 through March 31 8.0 mg/L 24.0 mg/L Daily Composite Effluent Dissolved Oxygen 3 Daily Grab Effluent, Upstream & Downstream pH 4 Daily Grab Effluent Temperature Daily Grab Effluent, Upstream & Downstream Fecal Coliform eometric mean 200 / 100 ml 400/100 ml Daily Grab Effluent Total Residual Chlorines 28 /ag/L Daily Grab Effluent Conductivity Daily Grab Effluent TKN Weekly Composite Effluent NO3-N + NO2-N Weekly Composite Effluent Total Nitrogen Weekly Composite Effluent Total Nitrogen Loads Monitor & Report (lb/mo) Monthly Calculated Effluent Total Phosphorus 1 2.0 mg/L I I Weekly Composite Effluent Total Phosphorus Loads Monitor & Report (lb/mo) Monthly Calculated Effluent Total Lead Monthly Composite Effluent Total Mercury Monthly Grab Effluent Total Copper Monthly Composite Effluent Total Zinc Monthly Composite Effluent Chronic Toxicity 8 Quarterly Composite Effluent Effluent Pollutant Scan9 Annuals y Grab/ Cam osite Effluent Notes: 1. Upstream = at Highway 54. Downstream = at NCSR 2158. Stream samples shall be grab samples collected three times per week during June, July, August and September and once per week during the remaining months of the year. See section A .(2) for details regarding the provisional waiver of instream monitoring requirements. 2. The monthly average effluent BODS and Total Suspended Solids concentrations shall not exceed 15% of the respective influent value (85% removal). 3. The daily average dissolved oxygen effluent concentration shall not be less than 5.0 mg/L. Permit NCO021211 4. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units. 5. Effluent monitoring and limitation only apply if chlorine or a chlorine derivative is added to the waste stream during treatment. The limit will take effect)uly 1, 2008. 6. TN or TP Load is the mass quantity of Total Nitrogen and Total Phosphorus discharged in a given period of time. See Special Condition A. (5) Calculation of Mass Loads. 7. The quarterly average for total phosphorus shall be the average of composite samples collected weekly during each calendar quarter. 8. Chronic Toxicity (Ceiiodaphnia) limit at 14% with testing in March, June, September and December (see section A. (3)) 9. See Condition A. (6). There shall be no discharge of floating solids or visible foam in other than trace amounts. Permit NC0021211 SUPPLEMENT TO EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS SPECIAL CONDITIONS A. (2) PROVISIONAL WAIVER OF INSTREAM MONITORING REQUIREMENTS Instream monitoring requirements in this NPDES permit shall be provisionally waived so long as the Permittee remains a member of the Upper Cape Fear River Basin Association and the Association continues to function as approved by the Division and Environmental Management Commission. If the Permittee does not participate in the Association or if the Association ceases to function, the instream monitoring requirements in this permit become effective immediately; and the Division may reopen this permit by administrative letter to establish additional instream monitoring requirements it deems necessary to adequately characterize the effects of the discharges on water quality in the receiving stream. A. (3) CHRONIC TOXICITY PERMIT LIMIT (Quarterly) The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to Ceriodapbnia dubia at an effluent concentration of 14 %. The permit holder shall perform at a minimum, quarierl monitoring using test procedures outlined in the "North Carolina Ceriodapbnia Chronic Effluent Bioassay Procedure," Revised February 1998, or subsequent versions or "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions. The tests will be performed during the months of March, June, September and December. Effluent sampling for this testing shall be performed at the NPDES permitted final effluent discharge below all treatment processes. If the test procedure performed as the first test of any single quarter results in a failure or ChV below the permit limit, then multiple -concentration testing shall be performed at a minimum, in each of the two following months as described in "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions. The chronic value for multiple concentration tests will be determined using the geometric mean of the highest concentration having no detectable impairment of reproduction or survival and the lowest concentration that does have a detectable impairment of reproduction or survival. The definition of "detectable impairment," collection methods, exposure regimes, and further statistical methods are specified in the "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions. All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge Monitoring Form (MR-1) for the months in which tests were performed, using the parameter code TGP3B for the pass/fail results and THP3B for the Chronic Value. Additionally, DWQ Form AT-3 (original) is to be sent to the following address: Attention: 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. Permit NCO021211 Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required, the permittee will complete the information located at the top of the aquatic toxicity (AT) test form indicating the facility name, permit number, pipe number, county, and the month/year of the report with the notation of "No Flow" in the comment area of the form. The report shall be submitted to the Environmental Sciences Section at the address cited above. Should the permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will be required during the following month. Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Water Quality indicate potential impacts to the receiving stream, this permit may be re-opene d and modified to include alternate monitoring requirements or limits. NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism survival, minimum control organism reproduction, and appropriate environmental controls, shall constitute an invalid test and will require immediate follow-up testing to be completed no later than the last day of the month following the month of the initial monitoring. A (4). NUTRIENT MONITORING Pursuant to N.C. Gen. Stat. Section 143-215.1 and the implementing rules found in Title 15A of the North Carolina Administrative Code, Subchapter 2H, specifically, 15A NCAC 2H.01 12(b) (1) and 2H.0114(a), and Part II, Sections B-12 and B-13 of this Permit, the Director of DWQ may reopen this permit to require supplemental nutrient monitoring of the discharge. The additional monitoring will be to support water quality modeling efforts within the Cape Fear River Basin, and shall be consistent with a monitoring plan developed jointly by the Division and affected stakeholders. A. (5) CALCULATION OF MASS LOADS a. The permitte shall calculate monthly and annual TN (or TP) loads as follows: i. Monthly TN (or TP) Loads = TN (or TP) x TMF x 8.34 Where: TN (or TP) = the average Total Nitrogen (or Total Phosphorus) concentration (mg/L) of the composite samples collected during the month. TMF = the total monthly flow of wastewater discharged during the month QvIG/mo) 8.34 = conversion factor, from (mg/L x MG) to pounds ii. Annual TN (or TP) Load (lb/yr) = Sum of 12 monthly TN (or TP) Loads for calendar year. b. The permitte shall report monthly total nitrogen and total phosphorus results (mg/L and lb/mo) in the appropriate discharge monitoring report for each month and shall report each year's results (lb/yr) with the December report for that year. Permit NCO021211 A. (6) EFFLUENT POLLUTANT SCAN The permittee shall perform an annual Effluent Pollutant Scan for all parameters listed in the table below (in accordance with 40 CFR Part 136). The annual effluent pollutant scan samples shall represent seasonal (summer, winter, fall, spring) variations over the 5-year permit cycle. Unless otherwise indicated, metals shall be analyzed as "total recoverable." Additionally, the method detection level and the minimum level shall be the most sensitive as provided by the appropriate analytical procedure. Ammonia (as N) Chlorine (total residual, TRC) Dissolved oxygen Nitrate/Nitrite Total Kjeldahl nitrogen Oil and grease Total Phosphorus Total dissolved solids Hardness Antimony Arsenic Beryllium Cadmium Chromium Copper Lead Mercury . Nickel Selenium Silver Thallium Zinc Cyanide Total phenolic compounds Volatile organic cLt*ounds. 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 cWounds: 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-diphenylhydrazi ne Fluoranthene Fluorene Hexachlorobenzene Hexachlorobutadiene Hexachlorocyclo-pentadiene Hexachloroethane I ndeno (1,2,3-cd) pyrene Isophorone Naphthalene Nitrobenzene N-nitrosodi-n-propylamine N-nitrosodimethylamine N-nitrosodiphenylamine Phenanthrene Pyrene 1,2,4- tri chlorobenzene Test results shall be reported to the Division in DWQ Form- DMR-PPA1 or in a form approved by the Director, within 90 days of sampling. A copy of the report shall be submitted to Central Files to the following address: Division of Water Quality, Water Quality Section, 1617 Mail Service Center, Raleigh, North Carolina 27699-1617.