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HomeMy WebLinkAboutNC0084387_Permit Issuance_20101216A.�004% 0 AM% NCDENR North Carolina Department of Environment and Natural Resources Division of Water Quality Dee Freeman Beverly Eaves Perdue Coleen H. Sullins Secretary Governor Director December 16, 2010 F Mr. John C. Huber Charlotte -Mecklenburg Utilities 5200 Brookshire Boulevard Charlotte, North Carolina 28216 Subject: Issuance NPDES Permit NCO084387 Lee S. Dukes WTP Mecklenburg County Dear Mr. Huber: Division personnel have reviewed and approved your application for renewal of the subject permit. Accordingly, we are forwarding the attached NPDES discharge permit.. This permit -is issued pursuant to the requirements of North Carolina General Statute 143-215.1 and the Memorandum of Agreement between North Carolina and the U.S. Environmental Protection Agency dated October 17, 2007 (or as subsequently amended.) This final permit includes the following changes from the draft permit sent to you on October 27, 2010. o Based on revised flow data submitted to DWQ on November 10, 2010, a revised In -stream Wastewater Concentration (IWC) of 30% was determined using a summer 7Q10 flow of 1.8 cfs for McDowell Creek and a three-year, maximum monthly average flow of 0.503 MGD for Lee S. Dukes WTP. The Quarterly Whole Effluent Toxicity testing was changed to read as follows: Chronic Toxicity 7-day Pass/Fail Monitoring (Ceriodaphnia dubia) at 30%, January, April, July, and October. See Section A. (2). o The Total Residual Chlorine limitation was changed back to28 ug/L to reflect the revised flow data and IWC. The following changes made in the draft permit are retained in this permit as follows: o Monitoringfor settleable solids was removed from the permit o Turbidity monitoring remains but the limit was removed 1617 Mail Service Center, Raleigh, North Carolina 27699-1617 . Location: 512 N. Salisbury St. Raleigh, North Carolina 27604 One Phone: 919-807-63001 FAX: 919-807-64921 Customer Service:1-877-623-6748 NofthCarolina Internet: vnww.ncwaterquality.org • ,. _ ����r� An Equal Opportunity 1 Affirmative Action Employer L (`✓U o Monitoringforthefollowingparamete_rs was°added io thepermit: pH, copper, manganese, total phosphorus and total nitrogen. o A TRC footnote was added under Section A.(l.) to include the following statement: The Division shall consider all effluent TRC values reported below 50 µgll to be in compliance with the permit. However, the Permittee shall continue to record and submit all values reported by a North Carolina certified laboratory (including field certified), even if these values fall below 50 µg/R. Please note that the receiving stream is listed as an impaired waterbody on the North Carolina 2010 303(d) Impaired Waters List. Addressing impaired waters is a high priority with the Division, and instream data will continue to be evaluated. If there is noncompliance with permitted effluent limits and stream impairment can be attributed to your facility, then mitigative measures may be required. 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 a demand is made, this permit shall be final and binding. Please take notice that this permit is not transferable. The Division may require modification 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, Coastal Area Management Act, or any other Federal or Local governmental permits may be required. If you have questions concerning this permit, please contact Julie Grzyb by e-mail Oulie.grzyb@ncdenr.gov) or phone at (919) 807-6389. Sinc �elAy, `' Oki C een H. Sullins r' Enclosure NPDES Permit NCO084387 (Final Permit) cc: NPDES Files Central Files Mooresville Regional Office / Surface Water Protection e-copy: Aquatic Toxicology Unit EPA Region 4 (Final Permit and fact sheet) Mecklenburg County, Erin Hall Department of Health, Britt Setzer Terry Crowe, CMUD-Lee S. Dukes ORC 1617 Mail Service Center, Ralegh, North Carolina 27699-1617 Location: 512 N. Salisbury St. Ralegh, North Carolina 27604 ODe Phone: 91M07-6300 \ FAX: 91M07-6492 \ Customer Service:1-877-623-6748 NorthCarolina Internet www.nnity eA r www.ncwaterquality.org c _ a �rytulrall l An EquAl Opportunity \ Affirmative Action Employer � �/K ` "iL/f � Permit NCO084387 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 Charlotte -Mecklenburg Utility Department is hereby authorized to discharge wastewater from a facility located at the Lee S. Dukes WTP 7980 Babe Stillwell Farm Road Huntersville Mecklenburg County to receiving waters designated as McDowell Creek in the Catawba 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 February 1, 2011. This permit and authorization to discharge shall expire at midnight on February 28, 201 S. Signed this day December 16, 2010. j us% . n H. Sullins, Director Division of Water Quality By Authority of the Environmental Management Commission r Permit NCO084387 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 Charlotte -Mecklenburg Utility Department is hereby authorized to: - 1. Continue to operate a conventional water treatment plant with a discharge of filter -backwash wastewater, excess rainwater and supernatant from the alum sludge storage lagoon. This facility is located at the Lee S. Dukes WTP on Babe Stillwell Farm Road near Huntersville in Mecklenburg County. 2. Discharge from said treatment works at the location specified on the attached map into McDowell Creek, classified WS-IV waters in the Catawba River Basin. gStation r � �`��� 1e�-��� � I2145 n 0 rftl�Kt® N CO0843 87 CMUD / Lee S Dukes WTP Quad #: F15NW Stream Class: WS-IV Latitude:35°25'42" Subbasin:30833 Longitude: 81°53'17" 8-Digit 14UC: 03050105 Receiving Stream: McDowell Creek County: Mecklenburg M a Facility Location SCALE 1:24000 dYort� Permit NC0084387 A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS During the period beginning on the effective date of this 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 CHARACTERISTICS (Parameter Codes) Monthly Daily Measurement Sample Type Sample Location Average Maximum Frequenc Flow (MGD) Continuous Recording Effluent 50050 Total Suspended Solids (mg/L) 30.0 mg/L _ . 45.0 mg1L._ Weekly Grab Effluent 00530 pH > 6.0 and < 9.0 standard units Weekly Grab Effluent 00400 at all times Total Residual Chlorines 28 µg/L Weekly Grab Effluent 50060 Turbidity (NTU) Weekly Grab Effluent 00076 Aluminum (Ng/L) Quarterly2 Grab Effluent (01105 Total Iron (mg/L) Quarterly2 Grab Effluent 01045 Total Copper (Ng/L) Quartedy2 Grab Effluent 01042 Total Manganese (NglL) Quartedy2 Grab Effluent 01055 Nitrate/Nitrite Nitrogen (mg/L) Quarterly Grab Effluent NO2-N + NO3-N) 00630 Total Kjeldahl Nitrogen (mg/L) Quarterly Grab Effluent TKN 00625 Total Nitrogen3 (mg/L) Quarterly Grab Effluent NO2+NO3+TKN 00600 Total Phosphorus (mg/L) Quarterly Grab Effluent 00665 Whole Effluent Toxicity, Quarterly Grab Effluent (TGE3E) Footnotes: 1. The Division shall consider all effluent TRC values reported below 50 µg/ 1 to be in compliance with the permit. However, the Permittee shall continue to record and submit all values reported by a North Carolina certified laboratory (including field certified), even if these values fall below 50 µg/l. 2. Parameters should be monitored in conjunction with toxicity test. 3. TN = TKN + (NO3 — N) + (NO2 —N), where TN is Total Kjeldahl Nitrogen, and NO3 — N and NO2 —N are Nitrate and Nitrite Nitrogen, respectively. 4. Chronic Toxicity 7day Pass/Fail Monitoring(Ceriodaphnia dubia) at 30%; January, April, July, and October; See condition A.(2.) of the Supplement to Effluent Limitations and Monitoring Section of this Permit. All samples must be collected from a typical discharge event. There shall be no discharge of floating solids or visible foam in other than trace amounts. ,Permit NCO084387 r A. (2.) CHRONIC TOXICITY MONITORING (QRTRLY) The permittee shall conduct quarterly chronic toxicity tests using test procedures outlined in the "North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised February 1998, or subsequent versions. The'effluent concentration defined as treatment two in the procedure document is 30%. The testing shall be performed as a Ceriodaphnia dubia 7day pass/fail test. The tests will be performed during the months of January, April, July and October. Effluent sampling for this testing shall be performed at the NPDES Permitted final effluent discharge below all treatment processes. All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge Monitoring Form (MR-1) for the month in which it was performed, using the parameter code TGP3B. Additionally, DWQ Form AT-1 (original) is to be sent to the following address: Attention: North Carolina Division of Water Quality Environmental Sciences Section 1621 Mail Service Center Raleigh, N.C. 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 and accurate and include all supporting chemical/physical measurements performed in association with the toxicity tests, as well as all dose/response data. 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, then monthly monitoring will begin immediately. Upon submission of a valid test, this monthly test requirement will revert to quarterly in the months specified above. Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Water Quality indicate potential impacts to the receiving stream, this permit may be re- opened and modified to include alternate monitoring requirements or limits. If the Permittee monitors any pollutant more frequently then required by this permit, the results of such monitoring shall be included in the calculation & reporting of the data submitted on the DMR & all AT Forms 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. Lee S. Dukes WTP REASONABLE POTENTIAL ANALYSIS Outfall 001 NCO084387 Qw = 2.33 MGQ Ow (MGD) = 2.33 WWTPNVTP Class. Class 1 1 Q10S (cfs) = 1.50 IWC @ 1 Q10S = 70.65% 7Q10S (cfs) = 1.80 1WC @.7Q10S = 66.740/6 701OW (cfs) = 4.20 IWC @ 7Q10W = 46.23% 3002 (cfs) = NO 30Q2 DATA IWC @ 3002 = NIA Avg. Stream Flow, QA (cfs) = 31.00 lWC @ QA = 10.43% Receiving Stream: McDowell Creek Stream Class. WS4V PARAMETER TYPE STANDARDS ✓i CRITERIA (2) j y REASONABLE POTENTIAL RESULTS (1) ar z RECOMMENDED ACTION NC WQS/Chronic Apptled standard X FAV/Acule n / Del Hu Pred Cw Allowable Cw a Acute: NO WQS Aluminum NC 6500 WS(7010s) ug/L 191 191 2,700.0 Chronic: 9,739 No RPA. Predicted Max < 50% of Cw - No No value > Allowable Cw Monitoring required Acute: NO WQS Iron NC 1000 FW(7Q10s) ug/L 170 53 817.6 _ _ _ Chronic: 1,498 No RPA , Predicted Max ?50% of Cw - apply No value > Allowable Cw Quarterly Monitoring RPA-84387Freshwaterverl.xlsm, rpa Page 1 of 1 10/26/2010 Grzyb, Julie From: Sent: To: Subject: Ms. Grzyb [Julie], Myers.Pamala@epamail.epa.gov Tuesday, December 07, 2010 3:28 PM Grzyb, Julie; Belnick, Tom Re: Lee S. Dukes WTP Permit - final approval With those minor corrections I/EPA Region 4 have no further comments on this draft permit. As long as there are no other substantial changes to the draft permit - prior to issuance please proceed as your schedule allows. Please also include a copy of the corrected draft permit (electronically is fine) along with the final permit upon issuance (or sooner) for our files. If you require a more formal approval letter for your file I will be happy to prepare one for you, Thank you for allowing me a couple of extra days to review the edits to the original draft permit. Sincerely, Pamala Myers Pamala Myers 404.562.9421 myers.pamalaPepa.eov Environmental Engineer and Technical Advisor I Pollution Control and Implementation Branch Water Protection Division I Municipal and Industrial NPDES Section U.S. EPA, Region 4 1 61 Forsyth St. SW I Atlanta, GA 30303 From: "Grzyb, Julie" <iulie.grzyb(@ncdenr.eov> To: Pamala Myers/R4/USEPA/US@EPA Date: 12/07/2010 02:13 PM Subject: Lee S. Dukes WTP Permit Pamala, Received your message. Yes, the TRC with the flow of 0.503 MGD should be readjusted to 28 ug/L. 28 ug/L is in their current permit. Also, I will fix the number on the footnote. 1 Thanks, Julie Julie A. Grzyb, Environmental Engineer NC DENR / Division of Water Quality / Surface Water Protection Section NPDES Complex Permitting, Point Source Branch 1617 Mail Service Center, Raleigh, NC 27699-1617 919/807-6389 (wk); 919/807-6495 (fax) **Please note, my email address has changed to iulie.grzyb(@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 Beverly Eaves Perdue Governor MEMORANDUM 1T - .� NCDEHR North Carolina Department of Environment and Natural Resources Division of Water Quality Coleen H. Sullins Director October 27, 2010 To: Britt Setzer NC DENR / DEH / Regional Engineer Mooresville Regional Office From: Julie Grzyb NPDES Complex Permitting Subject: Review of Draft NPDES Permit NCO084387 CMUD — Lee S. Dukes WTP Mecklenburg County Please indicate below your agency's position or viewpoint on the draft permit and return this form by December 3, 2010. If you have any questions on the draft permit, please contact me at the telephone number or e-mail address listed at the bottom of this page. Dee Freeman Secretary RESPONSE: (Check one) Concur with the issuance of this permit provided the facility is operated and maintained properly, the stated effluent limits are met prior to discharge, and the discharge does not contravene the designated water quality standards. ❑ Concurs with issuance of the above permit, provided the following conditions are met: nn� Z LJ o ¢� ca cm a LIJ W t .r�.✓� O "� aU tlC a Opposes the issuance of the above permit, based on reasons stated below, or attached: z F— W ral,00 a. Signed Date: 1617 Mail Service Center, Raleigh, forth Carolina 27699-1617 Location: 512 N. Salisbury St. Raleigh, North Carolina 27604 �TOne Phone: 919-807-63001 FAX: 919-807-64921 Customer Service:1-877.623-6748 1 v O Carolina Internet: www.ncwaterquality.org Natwully An Equal opportunity 1 Affirmative Action Employer The Charlotte Observer Publishing Co. Charlotte, NC North Carolina ) as Affidavit of Publication Mecklenburg County) THE CHARLOTTE OBSERVER DINA SPRINKLE NCDENR/DWO/POINT SOURCE BRANCH 1617 MAIL SERVICE CENTER RALEIGH NC 27699 REFERENCE: 30063432 6517041 proposal Before the undersigned, a Notary Public of said County and State, duly authorized to administer oaths affirmations, etc., personally appeared, being duly sworn or affirmed according to law, doth depose and say that he/she is a representative of The Charlotte Observer Publishing Company, a corporation organized and doing business under the laws of the State of Delaware, and publishing a newspaper known as The Charlotte Observer in the city of Charlotte, County of Mecklenburg, and State of North Carolina and that as such he/she is familiar with the books, records, files, and business of said Corporation and by reference to the files of said publication, the attached advertisement was inserted. The following is correctly copied from the books and files of the aforesaid Corporation and Publication. PUBLISHED ON: 10/30 PUblb Notice NoM Caroline Envhunmental Management Commbslon MIXES ES Unit 16i7 Mall Sery Center Raleigh. NC 27 i517 NWke at Intent to Issue a NPUES Waelewaler Pennll The North Carollrm Envlromnenial Management Gonooe n pereo�nta) tonisdelow PLIES wastewater dlWuirge permit to Ue LPr517W1 AD SPACE: 68 LINE FILED ON: 11 02/10 NAME: TITLE: DATE: ow U In Testimyny Whereof I have hereunto set my hand and affixed my seal, the day and jear aforesaid. / e _/I Expires: My Commission Expires May 27, 2011 may e of Lee S. Dukes WTP REASONABLE POTENTIAL ANALYSIS NCO084387 Ow (MGD) = 2.33 WWTP/W TP Class. Class 1 1010S (Cfs) = 1.50 1WC @ 1Q10S = 70.65% 7010S (cfs) = 1.80 1WC @ 7Q10S = 66.740/6 7010W (cfs) = 4.20 1WC @ 701OW = 46.23% 3002 (cfs) = NO 30012 DATA 1WC @ 3002 = NIA Avg. Stream Flow, QA (cfs) = 31.00 1WC @ QA = 10.43% Receiving Stream., McDowell Creek Stream Class. WS4V Outfall 001 Qw=2.33 MGD, STANDARDS & CRITERIA (2) REASONABLE POTENTIAL RESULTS PARAMETER TYPE O RECOMMENDED ACTION NC WQS / Cbronk AppAed Standard h FAV/Acute n d Dot Max Pmd Cw AUombk Cw (1) IL z Acute: NO WQS Aluminum NC 6500 WS(7010s) ug/L 191 191 2,700.0 _ _ _ _ _ _ _ _ _739 _ _ Chronic 9, No RPA, Predicted Max < 50% of Cw - No� No value > Allowable Cw Monitoring required Acute: NO WOS Iron NC 1000 FW(7Q10s) ug/L 170 53 817.6 _ _ _ _ _ _ _ _ _ _ Chronic: 1,498 No RPA ,Predicted Max Z50% of Cw -apply No value > Allowable Cw Quarterly Monitoring RPA-84387Freshwaterverl.xlsm, rpa Page 1 of 1 10/26/2010 REASONABLE POTENTIAL ANALYSIS 1B PJuminum Dale Data BDL=II2DL Results 2007 450 450 Sld Dev. 323.310 2007 220 220 Mean 463.1984 2007 520 520 C.V. 0.6980 2007 550 550 n 191 2007 210 210 2007 270 270 Mult Factor = 1.2500 2007 420 420 Max. Value 2160.0 uglL 2007 200 200 Max. Pred Cw 2700.0 ugtL 2007 410 410 2007 300 300 2007 640 Mo 2007 210 210 2007 320 320 2007 180 180 2007 270 270 2007 280 280 2007 170 170 2007 140 140 2007 380 380 2007 1100 1100 2007 440 440 2007 320 320 2007 280 280 2007 470 470 2007 320 320 2007 280 2B0 2007 470 470 2007 530 530 2007 530 530 2007 590 590 2007 460 460 2007 380 380 2007 1010 1010 2007 132 132 2007 618 618 2007 806 806 2007 551 551 2007 450 480 2007 335 335 2007 514 514 2007 234 234 2007 734 734 2007 342 342 2007 428 428 2007 1430 1430 2007 522 522 2007 990 990 2007 880 880 2007 1220 1220 2007 863 m 20D7 294 294 2007 1140 1140 2008 858 858 2008 505 505 2008 79.6 79.6 2008 78.3 78.3 2008 855 B58 2008 505 505 2008 517 517 2008 840 840 200E 177 m 2008 459 459 2008 137 137 2008 385 385 2008 127 127 2008 272 272 2008 357 357 2008 336 336 2008 218 218 2008 601 601 2008 244 244 2008 246 246 2008 262 262 M08 456 456 2008 643 m 2008 210 210 2008 505 505 2008 191 191 2008 302 302 2008 416 416 2008 100 100 2008 305 305 2008 286 286 2008 236 236 2008 299 299 200E 741 741 2008 305 305 2008 185 185 2008 626 626 2008 415 415 2008 233 233 2008 557 557 2008 333 333 19 Iron Datc Data BDL=120L 1 2 3 y 50 50 55 54 Results IIIIIIIH-r Sid Dev. 63.1453 Mean 51.7610 C.V. 1.210 n 170 55 Mult Facto 1.4600 Max. Value 560.0 ug/L Max. Pred Cw 817.6 u9/L 54 200 200 140 140 65 65 190 190 86 86 560 560 50 108 50 50 59.4 so 50 50 50 50 50 309 50 92.3 50 68.7 68.4 193 50.9 56.6 96.7 50 124 127 88.7 59.4 85.4 78.2 79.6 78.3 50 50 50 50 174 50 50 50 50 50 80.1 368 50 50 50 50 50 50 50 50 50 m 50 50 50 50 50 50 50 50 50 50 REASONABLE POTENTIAL ANALYSIS 2008 $17 517 94 < 50 25 2008 578 578 95 < 50 25 2008 356 356 % 57 57 2008 648 548 97 50 25 2008 740 740 98 < 50 25 2008 367 367 99 59 59 2008 689 689 100 50 25 2008 927 927 101 < 50 25 2008 804 804 102 65.5 65.5 2008 323 323 103 62.5 62.5 2008 475 475 104 58.7 58.7 2009 540 540 105 < 50 25 2009 428 428 106 54.5 54.5 2009 682 682 107 < 50 25 2009 523 523 108 55.1 55.1 2009 426 426 109 50 25 2009 1600 1600 110 < 50 25 2009 298 298 111 120 120 2009 237 237 112 < 50 25 2009 175 175 113 < 50 25 2009 202 202 114 < 50 25 2009 492 492 115 50 25 2009 130 138 116 < 50 25 2009 277 277 117 < 50 25 2009 166 166 118 < 50 25 2009 418 418 119 1 50 25 2009 177 177 120 < 50 25 2009 327 327 121 < 50 25 2009 261 261 122 < 50 25 2009 399 399 123 < 50 25 2009 418 418 124 < 50 25 2009 524 524 125 50 25 2009 231 231 126 50 25 2009 182 182 127 < 50 25 2009 356 356 128 < 50 25 2009 332 332 129 < 50 25 2009 565 565 130 66.4 66.4 2009 477 477 131 < 50 25 2009 337 337 132 < 50 25 2009 430 430 133 50 25 2009 412 412 134 50 25 2009 361 361 135 50 25 2009 233 233 136 < 50 25 2009 376 376 137 50 25 2009 - 325 325 138 50 25 2009 390 390 139 50 25 2009 443 443 140 W 25 2009 444 444 141 < 50 25 2009 265 265 142 < 50 25 2009 303 - 303 143 50 25 2009 378 378 144 < 50 25 2009 557 557 145 < 50 25 2009 20M 2060 146 < 50 25 2009 358 358 147 160 160 2009 426 426 148 < 50 25 2009 `'. 1740 1740 149 < 50 25 2009 430 430 150 122 122 2009 649 649 151 55 55 2009 541 541 152 < 50 25 2009 211 211 153 < 50 25 2009 1830 1830 154 < 50 25 2009 303 33 155 165 165 2009 164 164 156 < 50 25 2010 329 329 157 50 25 2010 385 385 158 50 25 2010 2160 21M 159 < 50 25 2010 114 114 160 139 139 2010 370 370 161 < 50 25 2010 456 456 162 < 50 25 2010 284 284 163 < 50 25 2010 783 783 164 < 50 25 2010 475 475 165 101 101 2010 696 6% 166 58.1 %.1 2010 166 166 167 114 114 2010 240 240 168 50 25 2010 253 253 169 50 25 2010 420 420 170 < 50 25 2010 180 180 171 82 82 2010 340 3W 172 < 50 25 2010 650 650 173 < 50 25 2010 500 500 174 92 92 2010 350 360 175 88 88 2010 640 640 176 60 60 2010 220 220 177 74 74 2010 110 110 178 < 50 25 2010 370 370 179 50 25 2010 330 330 180 100 100 2010 520 520 181 < 50 25 2010 510 510 182 < 50 25 2010 430 430 183 50 25 2010 260 260 184 < 50 25 2010 480 480 186 < 50 25 2010 260 260 186 < 50 25 2010 620 620 187 1 50 25 2010 670 670 188 < 50 25 2010 650 650 189 1 50 25 2010 310 310 190 < 50 25 2010 560 560 191 < 50 25 - 192 ,2_< 50 25 As., data toamol0 revised 12-10-2010 IWC Calculations Facility: Lee S. Dukes WTP NCO084387 Prepared By: Julie Grzyb Enter Design Flow (MGD): 0.503 Enter s7Q10 (cfs): 1.8 Enter w7Q10 (cfs): 4.2 Total Residual Chlorine (TRC) Daily Maximum Limit (ug/1) Ammonia (Summer) k4onthly Average Limit (mg NH3-N/1) s7Q10 (CFS) 1.8 s7 10 (CFS) 1.8 DESIGN FLOW (MGD) 0.503 DESPgN FLOW (MGD) 0.503 DESIGN FLOW (CFS) 0.77965 DESIG LOW (CFS) 0.77965 STREAM STD (UG/L) 17.0 STREAM D (MG/L) 1.0 Upstream Bkgd (ug/1) 0 Upstream Bk (mg/1) 0.22 IWC (%) 30.22 IWC (%) 30.22 Allowable Conc. (ug/1) 56 Allowable Cone. g/1) 2.8 Ammonia (Winter) Monthly Average L' it (mg H3-N/1) Fee Coliform w7Q10 (CFS) 4.2 Monthly r e Limit: 200/100ml DESIGN FL (MGD) 0.503 (If DF >331 'tor) DESIGN F OW (CFS) 0.77965 (If DF<3 ; Limit) STREA STD (MG/L) 1.8 Dilutio Factor (DF) 3.31 Upstr m Bkgd (mg/1) 2 IWC %) 15. AI wable Cone. (mg/1) 10.3 Total Residual Chlorine 1. Cap Daily Max limit at 28 ug/I to protect for acute toxicity Ammonia (as NH3-N) 1. If Allowable Conc > 35 mg/I, Monitor Only 2. Monthly Avg limit x 3 = Weekly Avg limit (Municipals); capped at 35 mg/I 3. Monthly Avg limit x 5 = Daily Max limit (Non-Munis); capped at 35 mg/I 4. BAT for Minor Domestics: 2 mg/I (summer) and 4 mg/I (winter) 5. BAT for Major Municipals: 1 mg/I (year-round) Fecal Coliform 1. Monthly Avg limit x 2 = 400/100 ml = Weekly Avg limit (Municipals) = Daily Max limit (Non -Muni) NPDES Server/Current Versions/WLA; TB 1/16/2009 NC 2010 Integrated Report Categories 4 and 5 Impaired Waters All 13,123 waters in +': C...rs in Category 5-303(d) List for Mercury due to statewide fish consumption advice for several fish species AU —Number AU —Name AU —Description LengthArea AU_Units Classification Caaegorc Parameter Reason Ibr Rating Use Category Collection Year 303(d)ycar Catawba River Basin Mountain Island Lake -Catawba River Watershed 0305010114 0 11-120-(2.5) Long Creek From a point 0.6 mile downstream of 11.3 FW Miles WS-IV Mecklenburg County SR 2074 to a point 0.4 mile upstream of Mecklenburg County SR 1606 5 Copper Standard Violation Aquatic Life 2006 2008 4t Turbidity Standard Violation Aquatic Life 2008 2008 Q 11-115-(1) McDowell Creek From source to U.S. Hwy. 21 1.6 FW Miles C 4b Ecological/biological Integrity FishCom Poor Bioclassification Aquatic Life 2002 1998 Q 11-115-(1.5)a McDowell Creek From U.S. Hwy. 21 to SR 2136 Mecklenburg 4.4 FW Miles WS-IV Co (;J')cr ck Vj" 4b Ecological/biological Integrity FishCom Poor Bioclassification Aquatic Life 2002 1998 Q 11-11S-(1.5)b McDowell Creek FromSR2136 Mecklengurg Co to a point 2.9 FW Miles WS-IV 0.7 mile upstream of mouth 4b Ecological/biological Integrity Benthos Fair Bioclassification Aquatic Life 2007 2000 Q 11-115-(5) McDowell Creek From a point 0.7 mile upstream of mouth 2.7 FW Miles WS-IV;CA to Mountain Island Lake, Catawba River 4b EcologicaUbiological Integrity Benthos Poor Bioclassification Aquatic Life 2002 2000 Catawba River Basin Lake Wylie -Catawba River Watershed 0305010115 Q 11-130a Catawba Creek From source toSR2446, Gaston 5.6 FW Miles C 5 Ecological/biological Integrity Benthos Fair Bioclassification Aquatic Life 1990 1998 Q 11-130b Catawba Creek From SR2446, Gaston to SR2439, Gaston 3.1 FW Miles C 5 EcologicaUbiological Integrity Benthos Fair Bioclassification Aquatic Life 1990 1998 Q 11-130c Catawba Creek FromSR2439 to Lake Wylie 4.9 FW Miles C 5 Ecological/biological Integrity FishCom Poor Bioclassification Aquatic Life 2007 1998 Q 11-(123.5)b CATAWBA RIVER South Fork Catawba River Arm of Lake Wylie 1,291.0 FW Acres WS-V,B (Lake Wylie South FK Catawba Arm) North Carolina portion 5 Copper Standard Violation Aquatic Life 2006 2008 5 High Water Temperature Standard Violation Aquatic Life 2008 2010 QQ 11-135a Crowders Creek From source to SR 1118 1.9 FW Miles C 5 Ecological/biological Integrity Benthos Fair Bioclassification Aquatic Life 2002 1998 5 EcologicaUbiological Integrity FishCom Poor Bioclassification Aquatic Life 2004 1998 NC 2010 Integrated Report Category 4 and 5 303(d) List EPA Approved Aug 31, 201 9/20/2010 Page 23 of 145 SOC PRIORITY PROJECT: TO:WestemNPDES Unit Surface Water Protection Section Attention: Charles Weaver Date: July 30, 2009 NPDES STAFF REPORT AND RECOMMENDATIONS County: Mecklenburg NPDES Permit No.: NC0084387 PART I - GENERAL INFORMATION 1. Facility and address: Lee S. Dukes Jr. Water Treatment Plant 7980 Babe Stillwell Farm Road Huntersville, NC 28078 2. Date of investigation: July 24, 2009 3. Report prepared by: B. Dee Browder, Environmental Engineer 4. Person contacted and telephone number: Terry Crowe, CMU, (704)948.6954 5. Directions to site: From the jct. of Hwy 73 and Babe Stillwell Farm Road turn left onto Babe Stillwell Farm Road. The water treatment plant is at the end of the road. 6. Discharge point(s): Latitude: 350 25' 42" Longitude: 810 53' 17" USGS Quad No.: F 15 NW 7. Receiving stream or affected surface waters: McDowell Creek a. Classification: WS-IV b. River Basin and Subbasin No.: Catawba 030833 C. Describe receiving stream features and pertinent downstream uses: Receiving stream is 6-8 feet wide and 12-18 inches deep at the time of the inspection. d is o,-ti 2010 /v— ,,a. tAxl- I A err. Page Two PART H - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS 1. a. Volume of wastewater: 0.700 MGD (Phase 1), 2.100 MGD (Phase II), 4.200 MGD (Phase III) b. What is the current permitted capacity: N/A C. Date(s) and construction activities allowed by previous ATCs issued in the previous two years: N/A d. Description of existing or substantially constructed WWT facilities: The existing WWT facilities consist of a surge/equalization tank followed by a clarifier, a gravity thickener, a flow totalizer, declorinization, and sludge storage lagoon.. e. Description of proposed WWT facilities: N/A f. Possible toxic impacts to surface waters: There are no toxic impacts expected. g. Pretreatment Program (POTWs only): Not Needed. 2. Residual handling and utilization/disposal scheme: N/A a. If residuals are being land applied specify DWQ Permit No. Land applied on adjacent properties quarterly. Solids may be taken to a belt press facility and/or land applied or transported to a landfill. i�X��SX75} Treatment plant classification: Class I 4. Compliance Background: Good PART III - OTHER PERTINENT INFORMATION Special monitoring or limitations (including toxicity) requests: None at this time. 2. Important SOC/JOC or Compliance Schedule dates: N/A Alternative analysis evaluation a. Spray Irrigation: N/A b. Connect to regional sewer system:N/A C. Subsurface: N/A' d. Other disposal options: N/A Page Three PART IV - EVALUATION AND RECOMMENDATIONS The facility is well�ogeFate i me . s recommended that they permit be renewed as requested. 7 a Signature of Report Preparer ate Ac,�Water Quality Regional Supervisor Date h:\dsAdsr0MA. cCih CHARLOTTE:. May 28, 2009 Mrs. Dina Sprinkle NC DENR / DWQ / Point Source Branch 1617 Mail Service Center Raleigh, NC 27699-1617 Subject: NPDES Permit No. NCO084387 Lee S. Dukes Jr. Water Treatment Plant Mecklenburg County Dear Mrs. Sprinkle, RECEIVED JUN - 1 2009 DENR - WATER OUALITY POINT SOURCE BRANCH In accordance with our permit we are requesting renewal 180 days prior to our expiration date of February 28, 2010. Enclosed is our NPDES Permit Application -Short Form C for the renewal of permit NCO084387 for the Lee S. Dukes Jr. Water Treatment Plant. Since the issuance of the last permit we have installed a Dechlorination chamber. In reference to the Dechlorination chamber I have enclosed the authorization to construct and the plan and section drawing by Black and Veatch. Also enclosed is a narrative description of our sludge management program and a map showing our discharge point with latitude and longitude. Lastly, a schematic of the flow through the facility with chemical application points has been included. If you have any questions, please contact me at 704-399-2426 ext. 222. Sinc ely, John C. Huber Water Treatment Superintendent CHARLOTTE-MECKLENBURG UTILITIES Water Treatment Division 5200 Brookshire Boulevard Charlotte, NC 28216 PH: 704/399-2426 FAX: 704/393-9163 CHARLOTTE,,, May 28, 2009 Mrs. Dina Sprinkle NC DENR / DWQ / Point Source Branch 1617 Mail Service Center Raleigh, NC 27699-1617 Subject: NPDES Permit No. NCO084387 Sludge Management Plan Dear Mrs. Sprinkle, In DENR - WATER QUALITY POINT SOURCE Er' '0(H The City of Charlotte, Charlotte Mecklenburg Utility Department has a complete Sludge Management Plan under permit #W.Q. 0000057. This plan includes the residuals handling for both the Wastewater Treatment Plants and Water Treatment Plants. The Sludge Management at the Lee S. Dukes Water Treatment Plant is as follows: 1. Solids generated from the water clarification process are discharged to gravity thickener and then discharged to a holding lagoon. 2. Solids generated from backwash water are sent to an equalization basin and then to a clarifier. Solids go to the thickener and are then discharged to the holding lagoon. Clarified water goes to the Decblorination chamber and is then discharged to NPDES discharge point 001. 3. Solids from the holding lagoon are removed by a contractor (currently Synagro) to be land applied as liquid. We also have the ability to tank the liquid to a belt press where is can be pressed and then land applied or taken to a land fill. 4. The contractor must follow the permit #W.Q. 0000057 for solids disposal. If you have any questions, please contact me at 704-399-2426 ext. 222. Sincer Jo . Huber Water Treatment Superintendent CHARLOTTE-MECKLENBURG UTILITIES Treatment Division 5200 Brookshire Boulevard Charlotte, NC 28216 PH: 704/399-2426 FAX: 704/393-9163 Lee S. Dukes Water Treatment Plant Process Flow Diagram as of 28 May 2009 -o 960 Zone ro Creek 6' DIP DRAIN INV EL 706.17---, 114. 1 1 FT WEIR EL 715.01 1 — EXIST 24" CLARIFIER EFFLUENT INV EL 712.41 WWCE-1 ---- REMOVE EXIST PIPE AND REUSE WEIR EL 715.01 — EXIST --- _.. GROUT�IN EXIST WWCE-1 24' CZAR EFF OPENING 24' CLARIFIER EFFLUENT INV EL 712.41 • �— 2'-0SO SUMP (TOS EL 706,17) TOP OF FILL NOTCH 6'X6' EL 706.50 OPENING (TYP ALONG EDGE OF 2 40 TOP OF FILL EL 706.87 ALONG EDGE IN PLAN SS BAFFLE WALL TO BE PROVIDED BY OWNER (TOW EL 725.17) 20'X1D' PRECAST CONC VAULT � WAFIWI /" A 1 EXIST 24' CLARIFIER EFFLUENT INV EL 715.91 20'X10' PRECAST CONC VAULT WI OPEN TOP (TOW EL 724.00) EXIST 24' CLARIFIER EFFLUENT INV EL 715.91 J VAULT SOT EL 706.17 • e o • • • • o a e a • • a • o • 0 0 0 0 0 0 0 0 0 o e e o 0 0 0 0 0 0 SECTION 1 12' MIN GRANULAR FILL SHEET OF FACT SHEET FOR EXPEDITED PERMIT RENEWALS This form must be completed by Permit Writers for all expedited permits which do not require full Fact Sheets. Expedited permits are generally simple 100% domestics (e.g., schools, mobile home parks, etc) that can be administratively renewed with minor changes, but can include facilities with more complex issues (Special Conditions, 303(d) listed water, toxicity testing, instream monitoring, compliance concerns). Basic Information for Expedited Permit Renewals Permit Writer/Date Julie Grzyb/ October 26, 2010 Permit Number NCO084387 Facility Name CMUD — Lee S. Dukes WTP Basin Name/Sub-basin number / 8-Digit HUC Catawba/ 030833 / 03050105 Receiving Stream McDowell Creek Stream Classification in Permit WS-IV CA CA not correct) Does permit need Daily Max NH3 limits? No Does permit need TRC limits/language? Yes Does permit have toxicity testing? Yes Does permit have Special Conditions? No Does permit have instream monitoring? No Is the stream impaired (on 303(d) list)? For whatparameter? Yes, for Benthos If Yes, add 303(d) language below Any obvious compliance concerns? ,[Attach BIMS Report; discuss with Region Any permit mods since lastpermit? Name change, formerly N. Mecklenburg WTP Current expiration date February 28, 2010 New expiration date February 28, 2015 Comments received on Draft Permit? Comment period ends Dec. 3, 2010 Yes No If Yes, discuss response with 1 Supervisor Most Commonly Used Expedited Language: • 003(d) language for Draft/Final Cover Letters: "Please note that the receiving stream is listed as an impaired waterbody on the North Carolina 303(d) Impaired Waters List. Addressing impaired waters is a high priority with the Division, and instream data will continue to be evaluated. If there is noncompliance with permitted effluent limits and stream impairment can be attributed to your facility, then mitigative measures may be required". • VTRC language for Compliance Level for Cover Letters/Effluent Sheet Footnote: "The Division shall consider all effluent TRC values reported below 50 µg/l to be in compliance with the permit. However, the Permittee shall continue to record and submit all values reported by a North Carolina certified laboratory (including field certified), even if these values fall below 50 µg/1." AIMS Compliance Download: Queries>Reports>Violations>Monitor Report Violations>Limit Violations for Past 3 Years This draft permit is for a conventional WTP located in Mecklenburg County. The source water for this facility is Lake Norman. The Permittee estimated the backwash at 0.197 MGD. Discharge monitoring reports show an average discharge flow of 1.85 mgd. Ammonia nitrogen and zinc orthophosphate are not used at the WTP. The Permittee does not backwash with fluoridated finished water. In accordance with the 2009 WTP Strategy the following parameters were added to the permit: copper, manganese, total phosphorus, total nitrogen and whole effluent toxicity monitoring. In accordance with the strategy, setteable solids and the turbidity limit were removed. Discharge Monitoring Reports 2007 — 8/2010 Parameters Flow TSS Setteable Solids Turbidity Iron Aluminum TRC Unit MGD m ml/L ntu u ug/L ug/L Average 1.85 4 <0.1 1.4 69 463 12 maximum 4.42 20 0.1 7.2 560 1 2160 1 33 RPA Analysis: ' An RPA was performed on Aluminum and Iron. Aluminum showed no reasonable potential to violate Water Supply standards and Fe showed no reasonable potential to violate Freshwater aquatic life standards. Since the facility uses Alum on a daily basis and the Predicted Maximum concentration of Iron was > 50% of the allowable concentration, quarterly monitoring was maintained. According to the 2009 WTP Strategy, the maximum monthly average flow in the most recent three-year period should be used when performing an RPA. The three-year, maximum monthly average flow of 2.33 mgd occurred in 8/2007 as shown in the table below. This maximum monthly average flow was also used to determine nutrient requirements and sampling frequency. Mont hl Avera a Flow (MGD)Data 8/2007 - 8/2010 Month 1 2 3 4 5 6 7 8 9 10 11 12 2007 2.33 1.58 1.77 1.67 1.73 2008 1.84 1.59 1.75 1.70 1.86 1.62 2.00 1.82 1.91 1.60 1.82 1.59 2009 1.6 1.67 1.58 1 1.58 1 1.12 12.08 1 1.65 1 1.74 1 1.77 1 1.89 1 1.56 1 1.6 2010 1 1.58 1.61 1.74 1 1.53 1.84 12.11 1 1.65 1 1.5 1 1 1 1 d Whole Effluent Toxicity Testing As part of the 2009 WTP Strategy Whole Effluent Toxicity testing was added to the proposed permit. The three-year, maximum monthly average flow of 2.33 mgd and a summer 7Q10 of 1.8 cfs were used to determine the in -stream wastewater concentration (IWC) of 67%. This summer 7Q10 value had been used to determine the TRC limit in the previous permit and is the same value used by the McDowell Creek WWTP which discharges to McDowell Creek downstream. Compliance Staff inspection performed in July 2009 noted that this facility is well operated and maintained. Regional staff recommended that the permit be renewed as requested. Addendum: November 23, 2010 On Nov. 4, 2010, Marcia Allocco of the Mooresville Regional Office discussed the difference in flows reported on the Discharge Monitoring Reports (1.85-4.42 MGD) verses the backwash flows listed on the renewal application (0.197 MGD) with the facility's ORC, Terry Crow. She learned that because the previous permit required instantaneous flow monitoring the numbers on the DMR represented the instantaneous flow rate at the time of sampling not the total flow through the outfall to McDowell Creek. The ORC had multiplied the instantaneous rate times 24 hours per day to get the total flow. Since the facility has a continuous flow meter, the ORC went back and reviewed the actual readings and submitted revised data for 2002 through Oct. 2010. The most recent three years of revised data is outlined below: Revised Monthly Average Flow (MGD) Data 11/2007-10/2010 Month 1 2 3 4 5 6 7 8 9 10 11 12 2007 0.226 0.169 2008 0.184 0.162 0.183 0.185 0.238 0.442 0.357 0.348 0.338 0.324 0.216 0.173 2009 0.184 1 0.191 1 0.200 1 0.210 1 0.390 0.351 10.503 0.498 0.438 0.241 1 0.265 0.166 2010 0.171 10.164 1 0.190 1 0.281 1 0.313 0.350 10.377 0.447 0.356 0.313 The facility uses-150,000 gallons on each backwash event and can backwash a number of times per day during the summer. They may only backwash once per day during the winter. When sludge is being wasted from the sedimentation basins an additional-40,000 gallons per day of process flow may be sent to the treatment system. The average discharge flow for the past three years was 0.282 MGD with a maximum of 0.587 MGD. Using the revised three-year, maximum monthly average flow of 0.503 mgd and a summer 7Q10 of 1.8 cfs, the in -stream wastewater concentration (IWC) was recalculated to be 30%. The effluent concentration for the quarterly chronic toxicity monitoring was revised to 30% throughout the permit. Also, the TRC limit was recalculated and changed from 25 ug/L to 28 ug/L. The facility's current TRC limit is 28 ug/l.