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HomeMy WebLinkAboutNC0060534_Permit Issuance_20001129• State of North Carolina Department of Environment and Natural Resources Division of Water Quality James B. Hunt, Jr., Governor Bill Holman, Secretary Kerr T. Stevens, Director Mr. Donald G. Byers City of Brevard 151 West Main Street Brevard, North Carolina 28712 A7rA NCDENR NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES November 29, 2000 Subject:Issuance of NPDES Permit NC0060534 City of Brevard WWTP Transylvania County Dear Mr. Byers: Division personnel have reviewed and approved your application for renewal o.f 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 May 9, 1994 (or as subsequently amended). A.s in the draft, the only change from you previous permit is the addition of upstream/downstream monitoring requirements for fecal coliform. This is in anticipation o.f the reclassification of the French Broad River to Class B waters, which requires instream fecal coliform monitoring and limits. 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 Natalie Sierra at telephone number (919) 733-5083, extension 551. Sincerely, Original Signed By David A. Goodrich Kerr T. Stevens cc: Central Files Asheville Regional Office/Water Quality Section LADES Unit Point Source Compliance Enforcement Unit EPA Region IV, Roosevelt Childress Aquatic Toxicology Unit 1617 Mail Service Center, Raleigh, North Carolina 27699-1617 Telephone (919) 733-5083 FAX (919) 733-0719 An Equal Opportunity Affirmative Action Employer VISIT US ON THE INTERNET @ http://h2o.enr.state.nc.us/NPDES Permit NC0060534 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, City of Brevard is hereby authorized to discharge wastewater from a facility located at the Brevard Wastewater Treatment Facility On NCSR 1540 Southeast of Brevard Transylvania County to receiving waters designated as the French Broad River in the French Broad 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 January 1, 2001. This permit and authorization to discharge shall expire at midnight on September 30, 2005. Signed this day November 29, 2000. Original Signed By David A. Goodrich Kerr T. Stevens, Director Division of Water Quality By Authority of the Environmental Management Commission Permit NC0060534 SUPPLEMENT TO PERMIT COVER SHEET The City of Brevard is hereby authorized to: 1. Continue to operate an existing 2.5 MGD wastewater treatment system with the following components: Influent lift station • Grit removal Rotating Biological Contactors (RBCs) Dual secondary clarifiers • Aerobic digester • Belt press Chlorination The facility is located southeast of Brevard at the Brevard Wastewater Treatment Facility, on NCSR 1540 in Transylvania County. 2. Discharge from said treatment works at the location specified on the attached map into the French Broad River, classified C waters in the French Broad River Basin. l err-..--/ H ';j� • la/7" :', ••' •-Brevrl"1 - t a� u .St Timoftiyl {trpft9x3 RM "lurcE ., 56 h -,'-'• • kc_ Ania Community R �Z - ffos itall'' F R.lJ0ing • % it ;t41,v$✓ �r ':}1L4r� — i \ " e P .., 17u—7'isgah Fore i Yumpi y stab 'yJ e '•'• �„ ile M .1 :i' City of Brevard WWTP Latitude: 35°15'05" Longitude: 82°41'40" Quad #: F8SW/Pisgah Forest Stream Class: C Receiving Stream: French Broad River Permitted Flow: 2.5 MGD Sub -Basin: 04-03-01 City of Brevard NC0060534 Brevard WWTP Permit NC0060534 A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS — FINAL During the period beginning on the effective date of the permit, the Permittee is authorized to discharge from outfall 001. Such discharges shall be limited and monitored by the Permittee as specified below: EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS Monthly Average Weekly Average Measurement Frequency Sample Type Sample Location Flow 2.5 MGD Continuous Recording Influent or Effluent BOD, 5 day (20°C)' 30.0 mg/I 45.0 mg/I Daily Composite Influent, Effluent Total Suspended Residue' 30.0 mg/I 45.0 mg/I Daily Composite Influent, Effluent NH3 as N 3/Week Composite Effluent Fecal Coliform (geometric mean)2 200/100 mL 400/100 mL Weekly2 Grab Effluent Upstream & Downstream Total Residual Chlorine Daily Grab Effluent Total Nitrogen (NO2+NO3+TKN) Quarterly Composite Effluent Total Phosphorus Quarterly Composite Effluent Temperature (°C) Daily Grab Effluent Chronic Toxicity3 Quarterly Composite Effluent pH4 3/Week Grab Effluent Footnotes: 1. The monthly average effluent BOD5 and Total Suspended Residue shall not exceed 15% of the respective influent value (85% removal) 2. Monitoring of fecal coliform should be performed three times a week during the months of June, July, August and September. Weekly monitoring should be done at all other times during the year (Administrative Code 2B.0508). 3. Whole effluent toxicity shall be measured using the chronic toxicity (Ceriodaphnia) P/F test at 2.4%. Tests should be performed in January, April, July and October. 4. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored daily at the effluent by grab sample There shall be no discharge of floating solids or visible foam in other than trace amounts. The daily average dissolved oxygen effluent concentration shall not be less than 5.0 mg/1. Permit NC0060534 A. (2.) CHRONIC TOXICITY TESTING (QUARTERLY) The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to Ceriodaphnia dubia at an effluent concentration of 2.4%. The permit holder shall perform at a minimum, auarterI i monitoring using test procedures outlined in the `North Carolina Ceriodaphnia 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 January, April, July and October. 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 Branch 1621 Mail Service Center Raleigh, North Carolina 27699-1621 Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Branch no later than 30 days after the end of the reporting period for which the report is made. Test data shall be complete, 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 Branch at the address cited above. Should the permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will be required during the following month. Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Water Quality indicate potential impacts to the receiving stream, this permit may be re -opened and modified to include alternate monitoring requirements or limits. 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. AFFIDAVIT OF PUBLICATION CLIPPING OF LEGAL ADVERTISING ATTACHED HERE PUBLIC NOTICE STATE OF NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION/NPDES. UNIT 1617 Mail Service Center Raleigh, N.C. 28699-1617 NOTIFICATION OF INTENT TO ISSUE A NPDES WASTEWATER PERMIT On the basis of thorough staff review and application of N.C. General Statute 143.21, Public law 92-500 and other lawful standards and regulations, the North Carolina Environmental Management Commission proposes to issue a National Pollutant Discharge' Elimination system (NPDES) wastewater discharge permit to the person (s) listed on the attached pages effective 45 days from the publish date of this notice. Written comments regarding the proposed permit will be accepted -di -tiff 30 days after the publish date of this notice. All comments received prior to that, date arc considered in the final determinations regarding the proposed permit. The Director of the N.C. Division of Water Quality may decide to hold a public meeting for the proposed permit should the Division receive a significant degree of public interest. Copies of the draft permit and other supporting information on file used to determine conditions present in ' the draft permit are available upon request and payment of the costs of reproduction. Mail comments and/or requests for information to the N.C. Division of Water Quality at the above address or call Ms. Christie Jackson at 919-733- 5083, extension 538. Please] include the NPDES permit number (attached) in any communication. Interested persons may also visit the Division of Water Quality at 512 N. Salisbury Street, Raleigh, N.C. 27604-1148 - between the hours of 8:00 a.m. and 5:00 p.m. to review` information on file. NPDES Permit Number NC0060534, Brevard, City of WWTP, 151 W. Main Street, Brevard, NC.28712 has applied for a facility located in Transylvania County discharging wastewater into French Broad River in the French Broad River Basin. Currently are water quality . limited. This discharge may affect future allocations in this portion of the receiving stream. m10/16/ltc NORTH CAROLINA TRANSYLVANIA COUNTY Before the undersigned, a Notary Public of said County and State, duty commissioned, qualified, and authorized by law to administer oaths, personally appeared David Phillips who being first duty sworn, deposes and says: that he (she) is Advertising Manager (Owner, partner, publisher, or other officer or employee authorized to make this affidavit) of The Transylvania Times, published, issued, and entered as second class mail in the Town of Brevard in said County and State; that he (she) is authorized to make this affidavit and sworn statement; that the notice or other legal advertisement, a true copy of which is attached hereto, was published in The Transylvania Times on the following dates: October 16, 2000 and that the said newspaper in which such notice, paper, document, or legal advertisement was published was, at the time of each and every such publication, a newspaper meeting all of the requirements and qualifications of Section I-597 of the General Statutes of North Carolina and was qualified newspaper within the meaning of Section I-597 of the General Statutes of North Carolina. This `J day of N./et& Ititi- 20 �. Sworn to day of, (Signature of person making affidavit) d subscri d before me, this , 20 1 v Notary Public My Commission expires: d -f �4 V4t) AFFIDAVIT OF PUBLICATION BUNCOMBE COUNTY SS. NORTH CAROLINA I PUBLIC NOTICE STATE OF NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION NPDES UNIT 1617 MAIL SERVICE CENTER RALEIGH, NC 27699-1617 NOTIFICATION OF INTENT TO ISSUE A NPDES WASTEWATER PERMIT On the basis of thorough staff review and ano i- cation of NC General Statute 92-500 and Public lawful standards and regulations, ibe North CarolinaEnvi mental. Management Commission aSNationalPPollut Pollut- ant Discharge Elimina- tion System (NPDES) wastewater discharge permit to the persons(s) listed on the attached Pages effective 45 days from the publish date of this notice. Written comments re- garding the proposed permit will be occept#d unti 130 days after the pub- lic date of this notice. All comrilet its received prior to that date are consid- ered In the final determi- nation regarding the pro - Posed permit. The Direc- tor of the NC Division of Water Quality may de- i Silt klo rN I[i-, -1 Quality at the above ad- dress or call Ms. Christie Jackson re- quests for information 1 to the NC Division of I Water Quality at the above address or call Ms. Christi Jackson at (919) 733-5083, extension Plans include i (atiadedDS)in wit)/ commJ- the niaation. Interested Persons mw also visit the Division af W2 N. iry Sl Quality Raleigh. NC Dop6f0f4-1148hours between fhe to rediew8:�am nfoxrtion on file. NC00 Permit Number CITY OF WWTP,,151RWe MAIN STREET, BRE-' YARD, NC 28712 has ap- plied for a facility located in TRANSYLVANIA County discharging wastewater into In � FRENCH BROAD Ry pareewcrteer equality limited. This discharge may af- fect portion ofuture f the receiv- ing stream. October 14, 2000 (2431) Itiop;10° O9 GEf, . ;T; r; L y POIN1 ;c EFt:9,w'C,H Before the undersigned, a Notary Public of said County and State, duly commissioned, qualified and authorized by law to administer oaths, personally appeared Bethany Chandler, who, being first duly sworn, deposes and says: that he (she) is the Legal Billing Clerk of TheAsheville Citizen -Times Company, engaged in publication of a newspaper known as The Asheville Citizen -Times, published, issued, and entered as second class mail in the City of Asheville, in said County and State; that he (she) is authorized to make this affidavit and sworn statement; that the notice or other legal advertisement, a true copy of which is attached hereto, was published in The Asheville Citizen - Times on the following dates: October 14, 2000And that the said newspaper in which said notice, paper, document or legal advertisement were published were, at the time of each and every publication, a newspaper meeting all of the requirements and qualifications of Section 1-597 of the General Statues of North Carolina and was a qualified newspaper within the meaning of Section 1-597 of the General Statues of North Carolina. This i 9th day of October (Signature of person making affidavit) Sworn to and subsc>Jed before me the 19th day of October :1-iiicuLev:Wt (Notary Pl ic) My Commission expires the 20th day of June of �,,,,.........,M,., 2005. ,,,•`'‘R1� ,c0kY �o kk DENR/DWQ FACT SHEET FOR NPDES PERMIT DEVELOPMENT NPDES No. NC0060534 Facility Information Applicant/Facility Name: City of Brevard Wastewater Treatment Plant Applicant Address: 151 West Main Street; Brevard, North Carolina 28712 Facility Address: NCSR 1540 southeast of Brevard, North Carolina Permitted Flow 2.5 MGD Type of Waste: 100% Domestic Facility/Permit Status: Class IV /Active; Renewal County: Transylvania County Miscellaneous Receiving Stream: French Broad River Regional Office: Asheville Stream Classification: (_' State Grid / USGS Quad: F8SW / Pisgah Forest, NC 303(d) Listed? No Permit Writer: Natalie Sierra Subbasin: 04-03-01 Date: 040ct00 Drainage Area (mi2): 220 � , r Lat. 35° 15' 05"N Long. 82° 41' 40" W Summer 7Q10 (cts) 161 Winter 7Q 10 (cts): 30Q2 (cis) Average Flow (cis): 750 IWC (%): 2.5% BACKGROUND Brevard's WWTP (Class IV) has a permitted flow of 2.5 MGD. Actual discharge has averaged 1.38 MGD over the last three years (or about 55% of permitted capacity). The facility discharges into the French Broad River, which is currently being reconsidered for reclassification to B waters. The facility's compliance record is good, with few violations and positive inspection reports. Brevard uses rotating biological contactors (RBCs) for nutrient removal, which achieves acceptable levels of nutrient removal. There are currently no nutrient limits in the permit. Brevard uses chlorination to reduce fecal coliform numbers. Unfortunately, no dechlorination is in place and the effluent chlorine values are exceedingly high. Instream Monitoring and Verification of Existing Conditions and DMR Data Review. The facility monitors for NH3, total residual chlorine (TRC), temperature, total nitrogen, total phosphorus and chronic toxicity. The total residual chlorine concentrations in the effluent are very high, averaging 1.24 mg/L. This value is nearly double the allowable concentration. The average values for total nitrogen and total phosphorus are 14.8 mg/L and 2.20 mg/L, respectively. This should not create problems, given the low instream waste concentration of 2.5%. Correspondence: The Asheville Regional Office (ARO) conducted several site visits within the past three and half years. The inspection reports reveal the facility to be in compliance, but having periodic problems with I/I. The facility has received one notice of violation (NOV) each for BOD, chronic toxicity and fecal coliform over the past four years. PERMITTING STRATEGY Waste Load Allocation (WLA). The Division prepared the last WLA in 1995. The previous and current effluent limits were based on guidelines and water quality standards. The Division has judged previous parameters and limits to be appropriate for renewal. Fact Sheet NPDES NC0060534 Renewal Page I The only proposed modification is a monitoring requirement for fecal coliform. It has been • proposed that the French Broad River be reclassified to B waters. This would mean that in addition to the existent limit in the permit, upstream and downstream monitoring would be required. Unfortunately, a TRC limit cannot be imposed, despite the high effluent TRC levels. Should the facility decide to expand, this should be instilled. SUMMARY OF PROPOSED CHANGES At this time, the only change that will be made is the addition of an upstream/downstream monitoring requirement for fecal coliform. This addition is in anticipation of the reclassification of the French Broad River to Class B waters. PROPOSED SCHEDULE FOR PERMIT ISSUANCE Draft Permit to Public Notice: October 11, 2000 Permit Scheduled to Issue: December, 2000 NPDES DIVISION CONTACT If you have questions regarding any of the above information or on the attached permit, please contact Natalie Sierra at (919) 733-5083 ext. 551. NAME: DATE: Fact Sheet NPDES NC0060534 Renewal Page 2 Ac IrC tis`1LvPiv* Cov M11-WOK, NO 5)J5 t60 J ND �I iZ rti-QS 1 kiac rJ �i S 4f (-ft -701. SCRIT °Ng S G6) C-e2AA141 Kalfrnr•IL, 6ict4 C CON DCTS 67? NAL Cif3etFiJ fftvenri et SL ID6C el Nc1 C-T- --0, altsPc r3. Rime 1-'-dt-D t Ne ! A1v ate; Pr?s (2A6, RO r.d c) ae.c ) wl C& I Lcw\-ek Sa-BilS N 04-I -0 `0I 667. -DATE ` - 05 '7 0) I (0 I ddS tAihr -1Q1ref- I( ?st r UKCZ-€7 17 L i ri 1 S vl BOS ! TSS e' <gco 1,ryt-,k 410,Q.,L_e CrU, Page Two 8/00 French Broad Permits The following facilities need permit adjustments: Facility/Class NC0021946/II (Rosman) Exp.8/2000 NC0060534/IV (Brevard) Exp. 8/2000 Requested Permit Modification Upstream/Downstream Fecal Coliform Monitoring Upstream/Downstream Fecal Coliform Monitoring NC0057541/II Fecal Coliform Effluent (Maston O'Neal) Fecal Coliform Effluent Exp.9/2000 Upstream/Downstream Fecal NC0076708/II (Riverwind) Exp.9/2000 NC0073741/11 (Mtn.Valley) Exp.9/2000 NC0024911/IV (MSD) Exp.9/2000 Fecal Coliform Effluent Fecal Coliform Effluent Upstream/Downstream Fecal Fecal Coliform Effluent Fecal Coliform Effluent Upstream/Downstream Fecal Limits Monitoring Coliform Monitoring Limits Monitoring Coliform Monitoring Limits Monitoring Coliform Monitoring Indicate on permit U,D, currently only E listed NC0020478/II Fecal Coliform Effluent (Lake Powhatan) Fecal Coliform Effluent Exp.9/2000 Upstream/Downstream Fecal Chlorine Residual Monito NC0021733/III (Marshall) Exp.10/2001 NC25836/II (Hot Springs) Exp.10/2001 Fecal Coliform Effluent Fecal Coliform Effluent Upstream/Downstream Fecal Fecal Coliform Effluent Fecal Coliform Effluent Upstream/Downstream Fecal Limits Monitoring Coliform Monitoring ring Limits Monitoring Coliform Monitoring Limits Monitoring Coliform Monitoring River/Classification FrB/Proposed "B Tr" FrB/Proposed "B" FrB/Proposed "B" FrB/Proposed "B" FrB/proposed "B" FrB/Proposed "B" Bent Crk/Proposed "B Tr" FrB/Proposed "B" FrB/Proposed "B" BILL HOLMAN SECR ETARY MEMORANDUM NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY ASHEVILLE REGIONAL OFFICE WATER QUALITY SECTION August 1, 2000 TO: Dave Goodrich \IJ` THROUGH: Forrest Westal FROM: Linda Wiggs SUBJECT: CENR - Fl,:7ER DUALITY PO:NT SOi•RCE BRANCH French Broad River Reclassification and Affected Facilities A use attainability study was recently performed on several rivers in the French Broad River Basin. A report submitted to the Planning Branch in April 2000 recommends reclassification from class "C" to class "B" waters for several of these rivers, documenting the extensive recreational use in these mountains streams. Of these rivers, the French Broad River and Bent Creek have permitted NPDES dischargers that do not disinfect their wastewater. In addition, several dischargers are not required to monitor up and downstream of their discharge. To protect the existing swimming use in these rivers, the Asheville Regional Office is requesting that the NPDES group review the following facilities whose permits are up for renewal and require Fecal Coliform effluent limits as well as upstream and downstream monitoring. Please refer to page 16 of 15A NCAC 2B.0500 regarding monitoring requirements in all appropriate situations. Also note that the classes of facilities are provided on the attachment. Notification has been sent to these facilities to inform them of the coming permit changes. We will work with the NPDES group to develop compliance schedules. Thank you for your assistance with this matter. If you have any questions or would like more information on the study, please feel free to contact me. FIIsr eu ANSF-14A INTERCHANGE BUILDING, 59 WOODFIN PLACE, ASHEVILLE, NORTH CAROLINA 28801-2414 PHONE 828-251-6208 FAX 828-251-6452 AN EQUAL OPPORTUNITY / AFFIRMATIVE ACTION EMPLOYER - 50% RECYCLED/10% POST -CONSUMER PAPER City of Brevard NORTH CAROLINA Utilities Department Donald G. Byers DIRECTOR Mr. Charles H. Weaver, Jr., NC DENR/Water Quality/NPDES Unit 1617 Mail Service Center Raleigh, NC 27699-1617 RE: Request for Renewal of NPDES NC0060534 Brevard Wastewater Treatment Plant Transylvania County Dear Mr. Weaver, The purpose of this letter is to request renewal of the City of Brevard's NPDES Permit #NC0060534. This permit if for the operation of a wastewater treatment facility that discharges into the French Broad River. There have been no major changes in this facility since the last permit was issued in 1995. A narrative description of our sludge management plan is enclosed, along with NPDES application — Standard Form A. If you should have any questions on the operation of this facility of this application packet, please feel free to call me @ 828-883-8461. Donald G. Byers Utilities Director City of Brevard North Carolina MAR 2 7 2000 DENR - WATER QUALITY POINT SOURCE BRANCH 151 West Main Street Wilson Road Brevard, North Carolina 28712 828-883-8461 Fax 828-884-6280 Stationary Screens Description Four stationary screens are provided as shown in Figure 3-7. Two of the screens (#1 and #2) were installed at an existing plant that was abandoned and the screens were moved to the new Brevard WWTP. The other two screens (#3 and #4) are new screens. The screens each have a capacity of approximately 1.152 MGD and treat the following flows depending on the number of screens in use. Screen Capacities No. Screens in Service Max. Flow Capability (MGD) l 1.152 2 2.304 3 3.456 4 4.608 Each screen consists of a metal frame and a type 316 stainless steel screen with 0.06 inch openings. Wastewater arrives at the plant in a 14" force main from Pump Station #2. The force main is provided with two 14" gate valves, as shown in Figure 3-6, which control the flow of influent into the plant. Under normal operating conditions valve #F1 should be open and valve #F2 should be closed. This will permit the incoming flow to pass onto the stationary screens. If it becomes necessary to bypass the screens, valve #F1 should be closed and valve #F2 should be opened. The wastewater will then pass into manhole #1 and will be discharged from that manhole directly to the RBC unit. The 14" line passes between the screens as shown in Figure 3-7, and 10" lines stub off to feed the individual screens. Each feed line is provided with a 10" gate valve that controls the flow to the screens. Wastewater from the lines flows down over the screens and the large particles are separated from the liquid portion of the wastewater. These particles, called screenings, fall off the screens onto screw conveyors that extend across the bottom of the screens. The conveyors consist of 12" diameter horizontal screws mounted in troughs. Screw conveyor #1 is a new unit and is driven by a 3/4 HP motor. Coneyor #2 was relocated from an existing wastewater treatment plant and is driven by a 1-1/2 HP, 230 V, single phase motor. Controls consist of a "H-O-A" selector switch and a time clock to control operation of the conveyors. In addition, a thermostat switch is provided that will close when the temperature falls to 35 degree F. This will cause the screws to operate continuously at low temperature in order to keep the screw mechanism from freezing. The liquid fraction of the wastewater flows down through the screens into a sump located below the screens. Wastewater flows from the sump in a 24" line that discharges into manhole #1. A second 24" line exits the manhole and transports the flow to the RBC unit. Under normal operating conditions valve #F1 should be opened and #F2 should be closed so that raw wastewater will pass through the screens before going to the RBC units. Rotating Biological Contractors (RBCs) Description The RBC process is a secondary biological wastewater treatment system consisting of large -diameter corrugated plastic media which are slowly rotated in a tank with approximately 40% of the media surface area submerged in the wastewater. Organisms naturally present in the wastewater adhere to the rotating surfaces and multiply until the entire surface area is covered with a thin layer of biomass. There are 8 horizontal RBC shafts installed at the Brevard WWTP and the discs mounted on these shafts provide approximately 1,072,000 square feet of surface area. The plant is designed as a single -stage process and is primarily intended to achieve BOD removal. That is to say the plant is not designed to achieve nitrification. The thin layer of biomass that develops on the discs contains a concentration of 50,000 to 100,000 mg/1 of suspended solids. This high concentration of microorganisms achieves a high degree of treatment in a relatively short retention time. The growth on the media is very filamentous and has a shaggy appearance. This provides an active biological surface area which is much larger than the surface area of the media. In rotation, the media carries a film of wastewater into the air. As the wastewater trickles down the surface if absorbs oxygen from the air. Organisms in the biomass remove both dissolved oxygen and organic materials from this film of wastewater. Further removal of dissolved oxygen and organic materials occurs as the media continues rotation through the bulk of the wastewater tank. Unused dissolved oxygen in the wastewater film is mixed with the contents of the mixed liquor which maintains a mixed liquor dissolved oxygen concentration. Shearing forces exerted on the biomass as it passes through the wastewater cause excess biomass to slough from the media into the mixed liquor. This prevents clogging of the media surfaces and maintains continual microorganism population of the media. The mixing action of the rotating media keeps the sloughed solids in suspension until the flow of treated wastewater carries them out of the RBC tank so that they can be separated from the wastewater in the final clarifiers. The RBC unit installed at the Brevard WWTP is the Aero-surf air -driven system manufactured by Envirex. This RBC unit has a row of air diffusers mounted below the rotating discs and air is supplied to the diffusers room air blowers. As the air is released in the tank it is captured in air caps attached to the periphery of the media and this air causes the shafts to rotate, adds dissolved oxygen to the wastewater and helps to strip the biological solids from the rotating discs. The rotational speed of the shafts can be varied by varying the amount of air supplied to the diffusers. Final Clarifiers Description Two final clarifiers are provided at the Brevard WWTP as shown in Figure 3-14. Each clarifier is 50' in diameter and operates at a 14' side -water depth. Effluent from the RBC tank flows to the clarifier division box in a 24" line as shown in Figure 3-9. The division box contains two adjustable weir gates that control the flow of wastewater to the individual clarifiers. Wastewater enters the clarifiers by 24" influent lines which discharge into the center well of the clarifiers. Each clarifier is equipped with a rotating sludge scraper which scrapes the settled sludge to a collection well located at the center of each clarifier. Each clarifier is also equipped with a scum baffle, scum scraper and scum collection box in order to remove and collect scum that rises to the surface of the clarifiers. The sludge and scum rakes are driven by a V2 HP electric motor connected to a worm gear reducer by means of a roller chain drive. The drive unit is provided with an overload device that includes two limit switches adjusted so that a contact closure occurs at 80°A, overload and another contact closes at maximum overload. Liquid effluent leaves the clarifiers by discharging over an effluent weir and into an effluent channel. The flow is transported to the Chlorine Contact Chamber in a 24" line. Sludge that settles to the bottom of the clarifiers is raked to the sludge well by the sludge collector and is lifted to a sludge box by a telescoping valve. The sludge is then discharged to the Sludge Pumping Station and is pumped to the Sludge Holing Tank or to the Belt Filter Press Building. The scum is discharged from the scum trough into the sludge box and is discharged with the sludge to the Holding Tank. Sludge Pumping Station Description The Sludge Pumping Station is a prefabricated pump station located adjacent to the Final Clarifiers. A layout of the station is shown in Figure 3-17. The Sludge Pump Station contains two vertical, close -couples, non -clog sewage pumps with the following characteristics: Capacity = 250 GPM Head = 40' Max Speed = 1150 RPM Electrical = 460 volt, 3 phase, 60 Hertz The pumps are located in a dry -well and take suction from the wet -well through 6" suction lines. Each pump is provided with a 6" plug valve on its suction side and a 4" check valve and 4" plug valve on the discharge side. The pumps discharge into a 4" force main that transfers the sludge to the Sludge holing Tank or to the Belt Filter Press Building. The force main contains two 4" valves that control the direction of flow for the sludge. Controls for the pumps consist of a "Hand -Off -Auto" selector switch, indicating lights and an elapsed time meter for each pump. Pump operation is controlled by an air bubbler system that operates the pumps as a function of liquid level in the wet -well. The bubbler system causes the pumps to operate as follows: Wet -well Elevation Wet -well Depth Functions 2099.5 6.5 High Level Alarm 2099 6.0 2nd Pump On 2098 5.0 1 st Pump On 2095 2.0 Pumps Off A sump pump is installed in the dry -well to remove water that enters the well. The pump has a capacity of 34 GPM at a TDH of 15' and is driven by a 1/3 HP motor. Operation of the pump is controlled by an automatic float valve that starts and stops the pump in response to rising and falling levels in the sump. The dry -well also contains a refrigeration -type dehumidifier that is provided to maintain a dry atmosphere within the station. The unit is provided with an automatic humidistat control, and will operate the unit to maintain the desired conditions in the station. Chlorination Descriation Chlorination equipment at the Brevard Plant includes two wall -mounted, solution - feed chlorinators designed for manual control of Sodium Hyperchlorite Feed System. The capacity of each unit is between 25-500 pounds per day. Chlorine is supplied to the chlorine feed pumps from two 1000-gallon containers mounted in the Chlorine Building. Each container is connected to a chlorine feed pump. The liquid chlorine is fed from the containers through the chlorine feed pumps. The flow through the chlorine feed pumps can be manually controlled by knobs on the units. Normally, only one chlorinator will be required to be in service at any given time and the other unit shall be on standby. Liquid chlorine is fed from the feed pumps to an injector, which receives a flow of water to form a chlorine solution. The solution is fed from the injector to diffusers mounted in the Chlorine Contact Chamber. The Chlorine Contact Chamber consists of a baffled concrete tank that is 41' — 9" long by 32' wide. Wastewater arrives at the Chlorine Contact Chamber in a 24" line and enters the inlet compartment of the chamber. The inlet compartment is equipped with two slide gates and the Chlorine Contact Chamber is divided into two sections as shown in Figure 3-20. The chlorine diffusers are located in the inlet compartment to introduce the chlorine solution to the wastewater. The contact chamber is provided with around - the -end baffle walls that provide some degree of mixing and prevent short-circuiting of flow through the chamber. Effluent leaves the chamber by discharging over weir walls and into an effluent chamber. The flow leaves the chamber by passing over an additional weir into a 24" effluent line that transports the effluent to the point of discharge in the French Broad River. An ultrasonic device is mounted above the effluent chamber to measure the water level over the weir. This device serves as an effluent flow -measuring device for the plant. Sludge Treatment Description Sludge is generated in the RBC unit at the Brevard WWTP and sill be collected in the Final Clarifiers. This sludge is mostly liquid, but the relatively small fraction of solids will contain a high percentage of volatile (organic) matter. Typical sludge, as discharged from final clarifiers at an RBC plant, can be expected to have the following general characteristics: Solids Content 1% - 3.5% Moisture Content 96.5% - 99% % Volatile Solids 85% Treatment and disposal of sludge is an important part of the wastewater treatment process. Sludge treatment, prior to disposal, has two main objectives. 1) To reduce the concentration of organic matter in the sludge in order to produce a biologically stable material. 2) To dewater the sludge (separate the solid and liquid fractions) so that less volume of material remains for final disposal. Sludge treatment facilities at the Brevard Treatment Plant include an aerated sludge holding tank (aerobic digester), and belt filter presses. The sludge will not be completely stable when discharged into the holding tank; however, aeration of sludge in the tank will help to stabilise the organic fraction of the sludge solids. The tank also serves as a holding tank for the sludge prior to dewatering. The Sludge Holding Tank can also serve as a thickener to help concentrate the sludge solids prior to discharge of the solids to the filter presser. Thickening will reduce the volume of sludge that must be dewatered on the presses. Sludge Wasting Practices Description Sludge from the final clarifiers can be wasted to either the Sludge Holding Tank or to the Filter Press Building. Sludge is withdrawn from the final clarifiers in 8" lines as shown in Figure 3-15. These 8" lines discharge into the wet -well of the sludge pumping station and the pumps in the station discharge to either the Sludge Holding Tank or to the Filter Press Building. As discussed above, the arrangement of piping and pumps makes it possible to waste sludge to either the Sludge Holding Tank or the Filter Press Building. If it is necessary to discharge sludge and the operator does not wish to operate the filter presses, he may discharge to the Sludge Holding Tank and store the sludge until he is ready to operate the presses. If he wishes to bypass the holding tank and discharge directly to the filter presses he may operate in that manner as well. The choice of which way to operate may be dictated by a number of factors including the preference of the operator. Sludge Holding Tank/Aerobic Digester Description The Sludge Holding Tank is 66' in inside diameter and operates with a side water depth of 16 feet, thus the tank has a volume of 54,711 ft3 or 409,241 gallons. It is equipped with a pipe grid system that contains air diffusers to distribute air throughout the tank to aerate and mix the contents. Air is supplied by a 100 HP Blower mounted on a pad adjacent to the tank. Waste sludge is introduced to the tank through the 4" line from the sludge pumping stating as discussed in Section 4.1 above. Sludge is withdrawn from the tank through a 4" line that drains to the sludge feed pumps in the Filter Press building. The tank is equipped with a supernatant withdrawal line and four drawoff pipes as shown in Figure 4-2. The top drawoff line does not have a valve and serves as an emergency overflow while the other three lines are equipped with valves to control supernatant withdrawal. Supernatant drains from the Holding Tank into the Supernatant Return Station and is pumped from the station to manhole #1 ahead of the Stationary Screen. Operation of the Supernatant Return Pumps is discussed in Section 4.3 below. Supernatant Return Pump Station Description The Supernatant Return Pump station consists of two submersible pumps located in a 6' diameter precast manhole wet -well as shown in Figure 4-3. Each pump discharges into a 4" force main which passes trough a valve pit. Each line is provided with a 4" check valve and 4" force main on the downstream side of the valve pit and this 4" main discharges into the influent manhole. Each pump is a Flygy CP-3102 submersible pump with a 5 HP motor rated for 460 volt operation. The pumps each have a capacity of 300 GPM at 30' TDH. The pumps are controlled by a "roto-float" float switch system that will start and stop the pumps in response to changes in water level in the wet -well. Controls for the pumps are mounted in a control module and consist of "H-O-A" selector switches for each pump, and a Pump #1-Alternate-Pump #2 selector switch. Rum lights and elapsed time meters for the pumps are also provided. Sludge Feed Pumps Description Two sludge feed pumps are provided in the Filter Press Building as shown in Figure 4-5. The pumps take suction from the Sludge Holding Tank and discharge through 4" lines to the belt presses. Each pump is equipped with a 15HP variable speed drive motor and each is capable of delivering from 50 to 215 GPM against 26 PSI. Polymer solution from the polymer feed system (Section 4.7) is injected into the discharge line at three points between the pumps and the belt presses. The pump drive units are the mechanically adjustable v-belt type complete with an adjustable speed transmission case and gear reducer. The speed adjustment is motor operated and adjustable from a remote device and manual control is also provided. Each pump is provided with a capacitance type flow detector for automatic shut down of the pump to prevent the pump from running dry. Piping is arranged so that either pump can serve either of the belt presses. This arrangement provides flexibility in the use of equipment and allows the pumps to serve as backups to each other. Belt Filter Press Description The filter press is designed to dewater liquid sludge that has been polymer conditioned and to provide a dewatered cake that can be readily disposed of. Sludge is first conditioned "in -line" with polymer and pumped to a distribution box which is mounted on the upper deck of the belt press frame. The resultant agglomerated solids release large amounts of free water as they are distributed onto the gravity drainage section of the press. This free water is removed by gravity through openings in the polyester belt and through a non-metallic grating to a drain pan. Baffling devices disperse sludge over the belt and open additional drainage channels for removal of ponded water which has formed on the sludge surface. Movement of the belt over the supporting non-metallic grate assists in the removal of capillary water. After sludge has been concentrated by means of gravity, the agglomerated solids are gently distributed onto a lower belt. The upper and lower belts then come together to form a moving wedge section. The sludge is sandwiched between the two belts. Gradual increased pressure is applied as the sandwiched sludge passes through rolls of decreasing diameter. The final rolls form a "S" shaped configuration which generate a shear force and open additional drainage channels. Dewatered sludge is discharged from the press for ultimate disposal. To aid the removal of dewatered sludge, doctor blades are utilized for each belt. After the cake has been discharged, the belts are washed with high pressure spray water. The position of each belt is continuously and automatically monitored by micro -torque sensing units ("live" hydraulic control valve) which are installed with guide devices. The guide device rides the edge of the polyester cloth belt. The micro -torque unit senses belt misalignment and automatically walks the belt back to the normal operating position by means of a "live" hydraulic cylinder which is attached to a tracking roller. The opposite end of the tracking rollers incorporates self -aligning pillow block bearings which allows the tracking rollers to pivot in a horizontal plane. Belt tracking is automatically operated by the hydraulic power pack. A limit switch is provided on each side of each belt to detect extreme belt travel and initiate a shutdown signal and sound an alarm. Each lower deck belt is equipped with a hydraulic cylinder operated by the hydraulic power pack to automatically insure proper present belt tension while dewatering varying thickness of sludge. Belt tensioning is accomplished by increasing the hydraulic pressure in the cylinders and is adjusted by valves at the hydraulic power pack. The upper deck belt tension is manually adjusted through screw type take-ups. The hydraulic power pack is provided to operate the lower deck drive components, tensioning and tracking mechanisms. Both pressure belts are drived by one common drive unit. The drive motor is designed to provide belt speeds up to 30 feet per minute. Both belts run at the same speed. A jog -reverse switch is provided to aid the operator during maintenance, clean-up, ect. The same power pack actuates the separate drive for the upper deck belt and its tracking device. The belt speeds can be easily changed to optimize dewatering performance by adjusting a valve at the power pack. Extreme belt travel triggers a limit switch that shuts the system down when operated in the automatic mode, and triggers an audio alarm when operated in either the manual or automatic mode. A small cable is strung on each side of the press which can be pulled in an emergency to shut down the entire system. A schematic view of the belt filter press is shown in Figure 4-9. SEPTAGE PRETREATMENT FACILITY INFLUENT CS MGD STATIONARY SCREENS SCHEMATIC OF WASTEWATER FLOW CITY OF BREVARD WASTEWATER TREATMENT SLUDGE TO LANDFILL ROTATING BIOLOGICAL CONTACTORS (8) SUPERNATANT RETURN LINE 6 DRY TONS PER DAY IVISION BOX BELT FILTER PRESS SUPERNATANT RETURN PUMP STATION CLARIFIERS (2) GPM DG SLUDGE HOLDING TANK SLUDGE PUMP STATION CHLORINE CONTACT CHAMBER BACKWASH PUMP STATION TO FRENCH BROAD RIVER 25 NGD WASTEWATER FLOW SLUDGE SUPERNATANT DRY SLUDGE FILTRATE BACKWASH WATER er \ • ctegio474-Altiars-1) _ _ Y •-`,fi •ii`r� _• t ' _ •� 1 imou n� I-q) BM J -56 •. J, Cit ;:A:----210 oxN iaCatwnunitr ••: Hof') D' ' .-.. PO . • 1io = — �' .sgah Foree r '.1 • :21T Whi`t� U, �•.—' �� 0 555) so • 1, - • l , City of Brevard NPDES NC0060534 Location Map ,1;�� •1 7 SC-ASC-A LC I . Z9" / 000 • t.I Br n: City of Brevard NORTH CAROLINA Utilities Department Donald G. Byers DIRECTOR City of Brevard Wastewater Treatment Facility Sludge Management Plan March 2000 The City of Brevard owns and operates a 2.5 million -gallon per day, Rotating Biological Contractor Wastewater Treatment Facility. Sludge produced by the RBC's is collected in 2-60' diameter clarifiers. Clarifier sludge is withdrawn and transferred to a 500,000-gallon aerobic digester. Digested sludges at approximately 2% solids are pumped to a 1.5 meter Envirex belt filter press. Six dry tons per day are produced on an average of five days per week. Solids content of this sludge range from 15 — 21 percent. The sludge is loaded by belt conveyor onto dump trucks and transported approximately fifteen miles along Highway 64 west to the Transylvania County Landfill. Transylvania County operates a "lined" landfill and mixes wastewater sludge with the municipal solid waste stream and add earth cover on a daily basis. 151 West Main Street 828-883-8461 Wilson Road Brevard, North Carolina 28712 Fax 828-884-6280 State of North Carolina Department of Environment, Health and Natural Resources Division of Environmental Management James B. Hunt, Jr., Governor Jonathan B. Howes, Secretary A. Preston Howard, Jr., P.E., Director Mr. Donald G. Byers 151 West Main Street Brevard, North Carolina 28712 AtT7A �EHNR April 25, 1996 Subject: NPDES Permit Modification NPDES Permit No. NC0060534 City of Brevard WWTP Transylvania County Dear Mr. Byers: On August 21, 1995, the Division of Environmental Management issued NPDES Permit No. NC0060534 to the City of Brevard WWTP. A review of the permit file has indicated that an error was inadvertently made in the permit. Accordingly, we are forwarding herewith a modification to the subject permit to correct the error. This permit modification is to Part III, Section F. The modification changes the text to accurately list the months in which toxicity testing is conducted. Please find enclosed an amended page for Part III which should be inserted into your permit. The old page should be discarded. All other terms and conditions contained in the original permit remain unchanged and in full effect. These permit modifications are issued pursuant to the requirements of North Carolina General Statutes 143-215.1 and the Memorandum of Agreement between North Carolina and the U. S. Environmental Protection Agency. If any parts, measurement frequencies or sampling requirements contained in this permit modification 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, Post Office Drawer 27447, Raleigh, North Carolina 27611-7447. Unless such demand is made, this decision shall be final and binding. If you have any questions concerning these permit modifications, please contact Charles Weaver at telephone number (919) 733-5083, extension 511. Sincerely yours, Preston Howard, Jr., P.E. cc. Mr. Roosevelt Childress, EPA Asheville Regional Office Central Files Permits and Engineering Unit Aquatic Survey &: Toxicology Unit P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone 919-733-7015 FAX 919-733-0719 An Equal Opportunity Affirmative Action Employer 50% recycled / 10% post -consumer paper Part III F) CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT (Quarterly) The effluent discharge shall at no time exhibit chronic toxicity using test procedures outlined in: 1.) The North Carolina Ceriodaphnia chronic effluent bioassay procedure (North Carolina Chronic Bioassay Procedure - Revised *September 1989) or subsequent versions. The effluent concentration at which there may be no observable inhibition of reproduction or significant mortality is 22% (defined as treatment two in the North Carolina procedure document). The permit holder shall perform quarterly monitoring using this procedure to establish compliance with the permit condition. The first test will be performed after thirty days from the effective date of this permit 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, DEM Form AT-1 (original) is to be sent to the following address: Permit No. NC0060534 Attention: Environmental Sciences Branch North Carolina Division of Environmental Management 4401 Reedy Creek Road Raleigh, N.C. 27607 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 any single quarterly monitoring indicate a failure to meet specified limits, then monthly monitoring will begin immediately until such time that a single test is passed. Upon passing, this monthly test requirement will revert to quarterly in the months specified above. Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Environmental Management indicate potential impacts to the receiving stream, this permit may be re -opened 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 and appropriate environmental controls, shall constitute an invalid test and will require immediate retesting (within 30 days of initial monitoring event). Failure to submit suitable test results will constitute noncompliance with monitoring requirements. DIVISION OF ENVIRONMENTAL MANAGEMENT September 18, 1995 MEMORANDUM TO: Dave Goodrich rA THROUGH: Matt Matthews (' FROM: Kristie Robeson SUBJECT: Permit Modification Brevard WWTP NPDES Permit No. NC0060534 Transylvania County By cover letter dated August 21, 1995, the subject facility was issued NPDES Permit No. NC0060534 with an effective date of October 1, 1995, and an expiration date of August 31, 2000. Upon review of the permit, a discrepancy was noted in the required testing months for toxicity. The M3 page of the permit specifies January, April, July, and October as the testing months, and Part III, Condition F specifies January, April, July and August as the testing months. This office recommends January, April, July, and October as the required testing months in order to reflect a quarterly schedule. I appreciate your assistance to undertake the necessary steps to modify the existing permit and incorporate the recommendation cited above. Should you have any questions, please feel free to contact me at 2136. cc: Asheville Regional Office Larry Ausley Central Files