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Home My WebLink AboutNC0024325_Permit (Issuance)_20060922NPDES DOCUMENT SCANNING COVER SHEET NPDES Permit: NC0024325 North Buffalo Creek WWTP Document Type: i Permit Issuance Wasteload Allocation Authorization to Construct (AtC) Permit Modification Complete File - Historical Engineering Alternatives (EAA) Correspondence Owner Name Change Staff Report Instream Assessment (67b) Speculative Limits Environmental Assessment (EA) Document Date: September 22, 2006 This document is printed on reuisce paper - ignore any content on the resrerse side 14 r NCDENR H Michael F. Easley Governor William G. Ross, Jr., Secretary North Carolina Department of Environment and Natural Resources Alan W. Klimek, P.E., Director Division of Water Quality September 22, 2006 Mr. Allan Williams, Director of Water Resources City of Greensboro 2199 White Street Greensboro, North Carolina 27405 Subject: Issuance of NPDES Permit NC0024325 North Buffalo WWTP Guilford County Dear Mr. Williams: 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 May 9, 1994 (or as subsequently amended). This final permit includes the following major changes from the draft permit sent to you on June 7, 2006: 1) The fluoride limit value was changed to 1.9 mg/L to correct an error. 2) Monitoring frequencies for Total Nitrogen, Nitrogen Species and Total Phosphorus were reduced to weekly in accordance with the revised Permitting Strategy for the Cape Fear River Basin. 3) An annual pollutant scan was limited to 3 times per permitting cycle to be consistent with the EPA requirements. However, the Division continues to recommend that a yearly analysis be conducted so that the Division may have more data to evaluate for the next permit renewal. 4) The Nutrient Controls Re -Opener language was changed to meet the Division's legal requirements. 5) The daily maximum total residual chlorine (1'RC) limit has been added to the permit. See the attached total residual chlorine policy memo for details. Greensboro is allowed 18 months from the effective date of the permit to comply with the total residual chlorine limit. This time period is allowed in order for the facility to budget and designs/construct the dechlorination and /or alternative disinfection systems. 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 N. C. Division of Water Quality / NPDES Unit 1617 Mail Service Center, Raleigh, NC 27699-1617 Internet: h2o.enr.state.nc.us Phone: (919) 733-5083 fax: (919) 733-0719 DENR Customer Service Center: 1 800 623-7748 h , (6714 Mail Service Center, Raleigh, North Carolina 27699-6714). Unless such demand is made, this decision shall be final and binding. 1 1cr to :Mr, !\ illi>rrrr , h; 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 Sergei Chernikov at telephone number (919) 733-5083, extension 594. Sincerely, Alan W. Klimek, P.E. cc: NPDES Unit Winston-Salem Regional Office / Water Quality Section PERCS Unit Aquatic Toxicology Unit Mr. Roosevelt Childress, EPA Region IV Permit NC0024325 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY • PERMIT TO DISCHARGE WASTEWATER UNDER THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM In compliance with the provision of North Carolina General Statute 143-215.1, other lawful standards and regulations promulgated and adopted by the North Carolina Environmental Management Commission, and the Federal Water Pollution Control Act, as amended, the City of Greensboro is hereby authorized to discharge wastewater from a facility located at the North Buffalo WWTP 2199 White Street, Greensboro Guilford County to receiving waters designated as North Buffalo Creek in the Cape Fear River Basin in accordance with effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II and III hereof. The permit shall become effective November 1, 2006. This permit and the authorization to discharge shall expire at midnight on June 30, 2011. Signed this day September 21, 2006. f Alan W. Klimek, P.E., Director Division of Water Quality By Authority of the Environmental Management Commission Permit NC0024325 SUPPLEMENT TO PERMIT COVER SHEET All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby revoked. As of this permit issuance, any previously issued permit bearing this number is no longer effective. Therefore, the exclusive authority to operate and discharge from this facility arises under the permit conditions, requirements, terms, and provisions included herein. The City of Greensboro is hereby authorized to: 1. Continue to operate an existing 16.0 MGD activated sludge wastewater treatment facility located at the North Buffalo Creek WWTP (2199 White Street, Greensboro, Guilford County). This facility includes the following treatment components: • Mechanical bar screens • Influent flow measurement (Parshall flume) • Aerated grit removal • Four primary settling tanks • 6 MGD flow transfer pump station to TZ Osborne From here the flow continues through one of the following treatment trains: Original Train • Two trickling filters • Activated sludge with nitrification (4 aeration basins with fine bubble diffusers) • Step feed process (optional) • Chemical addition for phosphorus removal • Five secondary clarifiers #2 Train • Activated sludge with nitrification (1) • Secondary clarifiers (2) The flows from the two separate trains come together and continue through the following treatment processes: • Four tertiary sand filters • Effluent flow measurement (Parshall flume) • Chlorination • Effluent aeration 2. Discharge from said treatment works (via Outfall 001) into North Buffalo Creek, a Class C- NSW stream in the Cape Fear River Basin, at the location specified on the attached map. Latitude: 36° 06' 34" Longitude: 790 44' 53" USGS Quad #: C20SW River Basin #: 03-06-02 Receiving Stream: North Buffalo Creek Stream Class: C NSW Nt City of Greensboro North Buffalo WWTP Guilford County NC0024325 Permit NC0024325 A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Beginning on November 1, 2006 and lasting until expiration, the Permittee is authorized to discharge treated wastewater from Outfall 001. Such discharges shall be limited and monitored by the Permittee as specified below: .i�., t� � .! �� rr�, ^r,�. ��+i. ��.-1 ., y �"�.�:. 4G K � 1, -,� , ,triAMETER , `��:� �. ;sue ,��Isi -,.?". y�� . �, .r tA'`' 1t� S.. •' , f i y ' YfF' t, ' ;v . 4«S� Y•. ° , ,; �p �,��>�rr � � r , = { � : �. • �. - - .. "' .� :: ?�...�-:'!'��.f•' .oi a: hl Y Y1 .S } 1Y •�j.a(. 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Daily _ � -,9��`�ct��- .:�E..�� ;; mnm , u 4 f }I_W�Ylr 1C7'�a1M•ICY' uL[.l:y' Measurement y�� :^e?_?�.�s�..:��-'�k :� ,rgo.bat, .:r� TI, l uelic ;s. ;7t ;} •• Ka $ :Oi `I,Ok. ; i S m le'• fi .�'� Pe_ , rlids�rn?:. .. � > wrevu:.Yy ` ample; � ;r�' ii 3,, ,, o:cation ` c.1,.. ;11 i Y. - Flow 16.0 MGD Continuous Recording Influent or Effluent Total Monthly Flow (MG) Monitor and Report Monthly Calculated Influent or Effluent CBOD, 5-day, 20°C (Summer)2 8.0 mg/L 12.0 mg/L Daily Composite Influent & Effluent CBOD, 5-day, 20°C (Winter)2 16.0 mg/L 24.0 mg/L Daily Composite Influent & Effluent Total Suspended Solids2 30.0 mg/L 45.0"mg/L Daily Composite Influent & Effluent NH3 as N (Summer) 4.0 mg/L 12.0 mg/L Daily Composite Effluent NH3 as N (Winter) 8.0 mg/L 24.0 mg/L Daily Composite Effluent Fecal Coliform (geometric mean) 200/100 mL 400/100mL Daily Grab Effluent Dissolved Oxygen Daily average > 6.0 mg/L Daily Grab Effluent Temperature°C Daily Grab Effluent pH > 6.0 and < 9.0 standard units Daily Grab Effluent Total Nitrogen (NO2+NO3+TKN)3 Weekly Composite Effluent Total Phosphorus4 2.0 mg/L quarterly averages Weekly Composite Effluent Chronic Toxicity5 Quarterly Composite Effluent Total Cyanides 5.2 pg/L 22.0 pg/L Weekly Grab Effluent Total Chromium 51.0 pg/L 1022.0 pg/L Weekly Composite Effluent Total Nickel 91.0 pg/L 261.0 pg/L Weekly Composite Effluent Total Mercury? 0.012 pg/L Weekly Grab9 Effluent Total Copper 2/Month Composite Effluent Total Zinc 2/Month Composite Effluent Total Iron Monthly Composite Effluent Total Selenium Quarterly Composite Effluent Fluoride* 1.9 mg/L Weekly Composite Effluent Chloride Quarterly Composite Effluent Dissolved Oxygen8 8 Grab U, D1, D2, D3 Fecal Coliform8 8 Grab U, D1, D2, D3 Temperature°C8 8 Grab U, D1, D2, D3 Conductivity 8 Grab U, D1, D2, D3 Total Residual Chlorine9 17.0 pg/L Daily Grab Effluent TKN (mg/L) Monitor and Report Weekly Composite Effluent NO3-N + NO2-N (mg/L) Monitor and Report Weekly Composite Effluent TN Load10 Monitor and Report (pounds/month) Monitor and Report (pounds/year) Monthly Annually Calculated Calculated Effluent Effluent TP Load'° Monitor and Report (pounds/month) Monitor and Report (pounds/year) Monthly Annually Calculated Calculated Effluent Effluent Effluent Pollutant Scan See A. (5) Notes: 1. U: Upstream at the influent conduit D1: Downstream at the unimproved road 0.8 miles east of White/Nealtown Road intersection. D2: Downstream at Rankin Mill Road. D3: Downstream in Buffalo Creek at McCleansville Road. Permit NC0024325 2. The monthly average effluent CBODS and TSS concentrations shall not exceed 15% of the respective influent value (85% removal). 3. The TN limit required by HB 515 is deferred until results of nutrient response modeling efforts are completed. 4. Compliance shall be based on a quarterly average of weekly samples, with quarterly periods defined as January - March, April June, July -September, and October -December. 5. Chronic Toxicity (Ceriodaphnia) at 90% with testing in January, April, July and October (see Special Condition A. (2)). 6. The quantitation limit for cyanide shall be 10 µg/L; levels reported below 10 pg/L shall be considered zero for compliance purposes. 7. Effluent samples must be analyzed by an EPA -approved low level mercury analysis method. 8. Instream monitoring requirements are waived as long as facility retains membership in the UCFRBA. If membership is cancelled, facility will monitor 3/Week (June -September) and 1/Week (October -May). Stream sampling may be discontinued at such times as flow conditions in the receiving waters or extreme weather conditions will result in a substantial risk of injury or death to persons collecting samples. Upon such discontinuance, stream sampling shall be resumed at the first opportunity after the risk period has ceased. 9. Facility is allowed 18 months from the effective date of the permit to comply with the total residual chlorine limit. This time period is allowed in order for the facility to budget and design/construct the dechlorination and /or alternative disinfection systems. 10. TN or TP Load is the mass quantity of Total Nitrogen or Phosphorus discharged in a given period of time. See Special Condition A.(4), Calculation of Mass Loads. (Summer): April 1- October 31, (Winter): November 1- March 31 (Daily): every day on which a wastewater discharge occurs except Saturdays, Sundays, and legal holidays unless otherwise specified by the Director. * The limit might be removed if the facility submits 12 month of data that shows no reasonable potential to exceed the water quality standard. There shall be no discharge of floating solids or visible foam in other than trace amounts. Permit NC0024325 A. (2) CHRONIC TOXICITY PERMIT LIMIT (Quarterly) The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to Ceriodaphnia dubia at an effluent concentration of 90%. The permit holder shall perform at a minimum, quarterly 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 tothe following address: Attention: Environmental Sciences Section North Carolina Division of Water Quality 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. Permit NC0024325 A. (3) PERMIT RE -OPENER: NUTRIENT CONTROLS Pursuant to N.C. Gen. Stat Section 143-215.1 and the implementing rules found in Title 15A of the North Carolina Administrative Code, Subchapter 2H, specifically, 15A NCAC 2H.0112(b)(1) and 2H.0114(a), and Part II sections B-12 and B-13 of this Permit, the Director of DWQ may reopen this permit to require supplemental nutrient monitoring of the discharge. The additional monitoring will be to support water quality modeling efforts within the Cape Fear River Basin, and shall be consistent with a monitoring plan developed jointly by the Division and affected stakeholders. A. (4) CALCULATION OF MASS LOADS a. The Permittee shall calculate monthly and annual TN (or TP) Loads as follows: i. Monthly TN (or TP) Load (pounds/month) = TN (or TP) x TMF x 8.34 where: TN (or TP) = average Total Nitrogen or (Total Phosphorus) concentration (mg/L) of the composite samples collected during the month TMF = Total Monthly Flow of wastewater discharged during the month (MG/mo) 8.34 = conversion factor, from (mg/L x MG) to pounds ii.. Annual TN (or TP) Load (pounds/year) = Sum of 12 Monthly TN (or TP) Loads for calendar year b. The Permittee shall report monthly Total Nitrogen and Total Phosphorus results (mg/L and pounds/month) in the appropriate discharge monitoring report for each month and shall report each year's results (pounds/year) with the December report for that year. L Permit NC0024325 A. (5) EFFLUENT POLLUTANT SCAN The Permittee shall perform an annual Effluent Pollutant Scan for all parameters listed in the attached table (using a sufficiently sensitive detection level in accordance with 40 CFR Part 136). The Permittee shall perform 3 Effluent Pollutant Scans prior to submitting the permit renewal application. Samples shall represent seasonal variations. Unless otherwise indicated, metals shall be analyzed as "total recoverable." Ammonia (as N) Chlorine (total residual, TRC) Dissolved oxygen Nitrate/Nitrite Kjeldahl nitrogen Oil and grease Phosphorus Total dissolved solids Hardness Antimony Arsenic Beryllium Cadmium Chromium Copper Lead Mercury Nickel Selenium Silver Thallium Zinc Cyanide Total phenolic compounds Volatile organic compounds:: Acrolein Acrylonitrile Benzene Bromoform Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane 2-chloroethylvinyl ether Chloroform Dichlorobromomethane 1,1-dichloroethane 1,2-dichloroethane Trans-1,2-dichloroethylene 1,1-dichloroethylene 1,2-dichloropropane 1,3-dichloropropylene Ethylbenzene Methyl bromide Methyl chloride Methylene chloride 1,1,2,2-tetrachloroethane Tetrachloroethylene Toluene 1,1,1-trichloroethane 1,1,2-trichloroethane Trichloroethylene Vinyl chloride Acid -extractable compounds: P-chloro-m-cresol 2-chlorophenol 2,4-dichlorophenol 2,4-dimethylphenol 4,6-dinitro-o-cresol 2,4-dinitrophenol 2-nitrophenol 4-nitrophenol Pentachlorophenol Phenol 2,4,6-trichlorophenol $ase-neutral compounds: Acenaphthene Acenaphthylene Anthracene Benzidine Benzo(a)anthracene Benzo(a)pyrene 3,4 benzofluoranthene Benzo(ghi)perylene Benzo(k)fluoranthene Bis (2-chloroethoxy) methane Bis (2-chloroethyl) ether Bis (2-chloroisopropyl) ether Bis (2-ethylhexyl) phthalate 4-bromophenyl phenyl ether Butyl benzyl phthalate 2-chloronaphthalene 4-chlorophenyl phenyl ether Chrysene Di-n-butyl phthalate Di-n-octyl phthalate Dibenzo(a,h) anthracene 1,2-dichlorobenzene 1,3-dichlorobenzene 1,4-dichlorobenzene 3,3-dichlorobenzidine Diethyl phthalate Dimethyl phthalate 2,4-dinitrotoluene 2,6-dinitrotoluene 1,2-diphenylhydrazine Fluoranthene Fluorene Hexachlorobenzene Hexachlorobutadiene Hexachlorocyclo-pentadiene Hexachloroethane Indeno(1,2,3-cd)pyrene Isophorone Naphthalene Nitrobenzene N-nitrosodi-n-propylamine N-nitrosodimethylamine N-nitrosodiphenylamine Phenanthrene Pyrene 1,2,4-trichlorobenzene Test results shall be reported to the Division in DWQ Form- A MR-PPA1 or in a form approved by the Director within 90 days of sampling. The report shall be submitted to the following address: Division of Water Quality, Water Quality Section, Central Files, 1617 Mail Service Center, Raleigh, North Carolina 27699-1617. NCDENR / DWQ FACT SHEET/NPDES PERMIT RENEWAL City of Greensboro/North Buffalo WWTP NPDES No. NC0024325 Facility Ii formation (1.) Facility Name: North Buffalo WWTP (2.) Permitted Flow,MGD: 16.0 MGD (6.) County: Guilford (3.) Facility Class: 4 (7.) Regional Office: Winston Salem (4.) Facility Status: Existing (8.) USGS Topo Quad: C20SW (McLeansville) Renewal (5.) Permit Status: eam Characteristics. (1.) Receiving Stream: North Buffalo Creek (2.) Subbasin Number: 030602 (8.) Drainage Area (mi2): 22.00 (3.) River Basin: Cape Fear (9.) Summer 7Q10 (cfs) 0.9 (4.) Stream Class: C NSW (10.) Winter 7Q10 (cfs): 2.6 (5.) 303(d) Listed: YES (11.) 30Q2 (cfs): 3.2 (6.) 305(b) Status: (12.) Average Flow (cfs): 25.00 (7.) Use Support: Not Supporting (13.) IWC (%): 96 SUMMARY This facility is a major municipal treatment plant operating in Guilford County that serves 78,850. City has a separate sewer collection system. Facility has a permitted flow of 16 MGD discharging into North Buffalo Creek. For the past 2 years annual average flow varied within the range of 10.81-12.77 MGD. The City of Greensboro has 7 significant industrial users and a full-scale pretreatment program. The permit will require the Town to continue to implement its existing pretreatment program. The facility discharges to North Buffalo Creek, which then discharges to Buffalo Creek>Reedy Fork>Haw River>Jordan Lake. The entire North Buffalo Creek is listed as biologically impaired on the 303(d) List. North Buffalo Creek receives large amounts of urban runoff from the City of Greensboro, as well as point source additions from Greensboro North Buffalo WWTP. North Buffalo Creek is a small stream and effluent dominated, with the permitted discharge from Greensboro North Buffalo representing 96% of the instream s7Q 10 flow. The City of Greensboro has developed a stormwater program that will start to address problems associated with nonpoint sources. North Carolina has finalized fecal TMDL for North Buffalo Creek in April 2004. The TMDL does not require any reductions in fecal load from point sources. REASONABLE POTENTIAL ANALYSIS Reasonable potential analyses were conducted for Cd, Cr, Cu, CN, F, Pb, Hg, Ni, Se, Zn (see attached) . NPDES PERMIT FACT SHEET Page 2 TOXICITY TESTING: Type of Toxicity Test: Existing Limit: Recommended Limit: Monitoring Schedule: City of Greensboro- North Buffalo V NPDES No. NC0024325 Chronic P/F 001: Chronic P/F @ 90% 001: Chronic P/F @ 90% January, April, July, and October The facility has been consistently passing its WET tests with one exception. The toxicity test failed during February 2002. The subsequent test passed. COMPLIANCE SUMMARY: DMRs have been reviewed for the period January 2002 through April 2006. Facility has a negative compliance record. During review period following following NOVs have been issued: 08/02/05 - Hg; 05/05/05 - Hg; 02/08/05 - Hg; 05/13/04 - CN; 05/12/04 - CN; 03/17/04 - CN; 05/03/03 - CN and NH3; 07/14/03 - CN and flow; 03 / 03 / 03 - CN; 02 / 26 / 03 - CN; 10 / 11 / 02 - CN; 07 / 23 / 02 - tox. test; 05 / 17 / 02 - CN; 02/01/02 - CN. The facility claims that they experience matrix interference and most of their CN limit violations are false positives. Currently they are conducting study to determine if matrix interference exists and their practical quantitation limit should be increased to 20 lig/L. A compliance evaluation inspection conducted on April 20, 2006 found that facility is well maintained and properly operated. INSTREAM MONITORING: Instream monitoring is required for temperature, dissolved oxygen, fecal coliform, and conductivity. The facility is a member of the Upper Cape Fear Monitoring Coalition, and all their instream monitoring is conditionally waived for the duration of their membership in the Coalition. PROPOSED CHANGES: • Monitoring Frequencies: Monitoring frequency for fluoride has been increased to weekly due to the implementation of the new permit limit. In accordance with the Division's new Permitting Strategy for Cape Fear River Basin the following changes have been made: 1. Monitoring frequencies for TN and TP were increased to 3/Week. 2. Monitoring for TKN and NO3-N + NO2-N was added to the permit. 3. Load monitoring for TN and TP was added to the permit. 4. Nutrient Controls Re -Opener condition was added to the permit. 5. Total monthly flow reporting was added to the permit. • Limits: Based on Reasonable Potential Analysis, a limit is being introduced for fluoride. • Priority pollutant monitoring on an annual basis has been added to fulfill the permit application requirement in the future. The existing monitoring frequency for zinc and copper remains unchanged. Due to the facility's toxicity record, limits for these action level standards will not be implemented, but monitoring will remain. Page 2 Version: September 18, 2006 2 NPDES PERMIT FACT SHEET City of Greensboro- North Buffalo Page 3 NPDES No. NC0024325 PROPOSED SCHEDULE FOR PERMIT ISSUANCE: Draft Permit to Public Notice: June 7, 2006 (est.) Permit Scheduled to Issue: July 31, 2006 (est.) STATE CONTACT: If you have any questions on any of the above information or on the attached permit, please contact Sergei Chernikov at (919) 733-5038 ext. 594. CHANGES TO THE FINAL PERMIT: a. The fluoride limit value was changed to 1.9 mg/L to correct an error. b. Monitoring frequencies for Total Nitrogen, Nitrogen Species and Total Phosphorus were reduced to weekly in accordance with the revised Permitting Strategy for Cape Fear River Basin. c. An annual pollutant scan was limited to 3 times per permitting cycle to be consistent with the EPA requirements. d. The Nutrient Controls Re -Opener language was changed to meet the Division's legal requirements. e. The daily maximum total residual chlorine (TRC) limit has been added to the permit. See the attached total residual chlorine policy memo for details. Facility is allowed 18 months from the effective date of the permit to comply with the total residual chlorine limit. This time period is allowed in order for the facility to budget and design/construct the dechlorination and /or alternative disinfection systems. Page 3 Version: September 18, 2006 REASONABLE POTENTIAL ANALYSIS North Buffalo WWTP N C0024325 Time Period 2001-2006 Qw (MGD) 16 7Q10S (cfs) 0.9 7Q10W (cfs) 2.6 30Q2 (cfs) 3.2 Avg. Stream Flow, QA (cfs) 25 Reeving Stream North Buffalo Creek WWTP Class IV IWC (%) Q 7010S 96.498 7Q10W 90.511 Q 30Q2 88.571 Q QA 49.799 Stream Class C Outfall 001 Qw=16MGD PARAMETER TYPE Ill STANDARDS & CRITERIA (2) PQL Units REASONABLE POTENTIAL RESULTS RECOMMENDED ACTION NC WQS/ Chronk X FAv/ Acute n # DeL Max A'ed Cw Allowable Cw Cadmium NC 2 15 ug/L 49 0 1.0 Acute: 15 Chronic: 2 ' r VD_--- I_--_-__—_____--r Chromium NC 50 1,022 ug/L 200 13 332.1 Acute: 1,022 _ _ _ _ — Chronic:-- 52 -- --�--- -----------------•--- Copper NC 7 AL 7.3 ug/L 0 -158 21.0 Acute: 7 _ic: _—__7 _— Chron _- _.- if/. �"1't , A., - —____ _—.- --- C�1 ` . , eil% Cyanide NC 5 N 22 10 ug/L 200 82 74.2 Acute: 22 _ _______ Chronic: 5 _--_—ii -i -_____-_-_-_ ----- Fluoride NC 1,800 ug/L 50 44 3,276.0 Acute: WA _ ___ _ _ Chronic: 1,865 I � ' _-!�.Ir`"i--_ _---_-_-_ ___----_- Lead NC 25 N 33.8 ug/L 49 0 12.5 Acute: 34 po. k,,i-- Mercury NC 12 ng/L 102 99 49.9100 Acute: N/A —_—___—_—_— Chronic: 12 A —_---� ---__--_•- - - Nickel NC 88 261 ug/L 199 68 121.0 Acute: 26 —---1-- Chronic: 91 LI � --- -- -------------------- Selenium NC 5.0 56 u /L 15 0 5.0 Acute: 56 __5 _ Chronic: / r - a lrrt ' !—40__� ( !�J' Zinc NC 50 AL 67 ug/L 0 0 192.0 Acute: 67 _ _ __—___— Chronic: 52 .Z ----,) --_�l /'t'tt_- __-_-_ _-- r c-it 1V� ]7c * Legend: C = Carcinogenic NC = Non -carcinogenic A = Aesthetic ** Freshwater Discharge 24325- rpa-2006, rpa 5/31/2006 REASONABLE POTENTIAL ANALYSIS Cadmium Chromium Date Data BDL=1/2DL Results < 2.00 1.0 Std Dev. 0.0000 < 2.00 1.0 Mean 1.0000 < 2.00 1.0 C.V. 0.0000 < 2.00 1.0 n 49 < 2.00 1.0 < 2.00 1.0 Mult Factor= 1.0000 < 2.00 1.0 Max. Value 1.0 ug/L < 2.00 1.0 Max. Pred Cw 1.0 ug/L < 2.00 1.00 < 2.00 1.00 < 2.00 1.00 < 2.00 1.00 < 2.00 1.00 < 2.00 1.00 < 2.00 1.00 < 2.00 1.00 < 2.00 1.00 < 2.00 1.00 < 2.00 1.00 < 2.00 1.00 < 2.00 1.00 < 2.00 1.00 < 2.00 1.00 < 2.00 1.00 < 2.00 1.00 < 2.00 1.00 < 2.00 1.00 < 2.00 1.00 < 2.00 1.00 < 2.00 1.00 < 2.00 1.00 < 2.00 1.00 < 2.00 1.00 <, 2.00 1.00 < 2.00 1.00 2.00 1.00 < 2.00 1.00 2.00 1.00 2.00 1.00 2.00 1.00 2.00 1.00 < 2.00 1.00 < 2.00 1.00 < 2.00 1.00 < 2.00 1.00 < 2.00 1.00 < 2.00 1.00 < 2.00 1.00 <' 2.00 1.00 Date Data BDL=1/2DL Results 1 < 10.00 5.0 Std Dev. 25.0564 2 < 10.00 5.0 Mean 9.0250 3 < 10.00 5.0 C.V. 2.7763 4 < to.00 5.0 n 200 5 < t o.00 5.0 6 < 10.00 5.0 Mult Factor = 1.6200 7 < 10.00 5.0 Max. Value 205.0 ug/L 8 < 10.00 5.0 Max. Pred Cw 332.1 ug/L 9 < to.00 5.0 10 < 10.00 5.0 11 < 10.00 5.0 12 r< 10.00 5.0 13 . < tn.00 5.0 14 '< to.00 5.0 15 f.< 10.00 5.0 16 f < 10.00 5.0 17 < 10.00 5.0 18 < 10.00 5.0 19 '< 10.00 5.0 20 < 10.00 5.0 21 < 10.00 5.0 22 < 10.00 5.0 23 '< 10.00 5.0 24 10.00 5.0 25 10.00 5.0 26 10.00 5.0 27 10.00 5.0 28 10.00 5.0 29 10.00 5.0 30 10.00 5.0 31 10.00 5.0 32 10.00 5.0 33 10.00 5.0 34 < 10.00 5.0 35 < 10.00 5.0 36 < 10.00 5.0 37 < 10.00 5.0 38 < 10.00 5.0 39 < 10.00 5.0 40 < 10.00 5.0 41 < 10.00 5.0 42 < 10.00 5.0 43 < 10.00 5.0 44 < 10.00 5.0 45 < 10.00 5.0 46 < 10.00 5.0 47 < 10.00 5.0 48 < 10.00 5.0 49 < 10.00 5.0 50 < 10.00 5.0 51 < 10.00 5.0 52 < 10.00 5.0 53 < 10.00 5.0 54 < 10.00 5.0 55 10.00 10.0 56 10.00 10.0 57 14.00 14.0 58 10.00 10.0 59 10.00 10.0 60 '< 10.00 5.0 61 < 10.00 5.0 62 < 10.00 5.0 63 < 10.00 5.0 64 < 10.00 5.0 65 < 10.00 5.0 66 < t0.00 5.0 67 < 10.00 5.0 68 < 10.00 5.0 69 < 10.00 5.0 70 < 10.00 5.0 24325- rpa-2006, data - 4 - 5/31/2006 REASONABLE POTENTIAL ANALYSIS 71 < 10.00 5.0 72 < 10.00 5.0 73 < 10.00 5.0 74 < 10.00 5.0 75 <, 10.00 5.0 76 < tom 5.0 77 < moo 5.0 78 <1 moo 5.0 79 <I 10.00 5.0 80 < 10.00 5.0 81 < 10.00 5.0 82 I< 10.00 5.0 83 < 10.00 5.0 84 <. 10.00 5.0 85 <' 10.00 5.0 86 <. 10.00 5.0 87 < 10.00 5.0 88 . < 10.00 5.0 89 < 10.00 5.0 90 <: 10.00 5.0 91 <. 10.00 5.0 92 < 10.00 5.0 93 < 10.00 5.0 94 < 10.00 5.0 95 <, 10.00 5.0 96 < 10.00 5.0 97 < 10.00 5.0 98 <' 10.00 5.0 99 <. 10.00 5.0 100 190.00 190.0 101 205.00 205.0 102 204.00 204.0 103 27.00 27.0 104 31.00 31.0 105 30.00 30.0 106 116.00 116.0 107 13.00 13.0 108 < la® 5.0 109 < 10.00 5.0 110 <• 10.00 5.0 111 <, 10.00 5.0 112 • < 10.00 5.0 113 < t 10.00 5.0 114 < 10.00 5.0 115 <' 10.00 5.0 116 < 10.00 5.0 117 < 10.00 5.0 118 < 10.00 5.0 119 < 10.00 5.0 120 <: 1a.00 5.0 121 ' < 10.00 5.0 122 <! 10.00 5.0 123 < 10.00 5.0 124 < 10.00 5.0 125 < 10.00 5.0 126 < 10.00 5.0 127 < , 10.00 5.0 128 <'; 10.00 5.0 129 <' 10.00 5.0 130 <1 10.00 5.0 131 <{ 10.00 5.0 132 <' 10.00 5.0 133 <; 10.00 5.0 134 < 10.00 5.0 135 <1 10.00 5.0 136 S: 10.00 5.0 137 <' 10.00 5.0 138 <': law 5.0 139 • <. 10.00 5.0 140 < 10.00 5.0 141 <. 10.00 5.0 142 <' 10.00 5.0 143 < 10.00 5.0 144 < I 10.00 5.0 -5- 24325- rpa-2006, data 5/31/2006 REASONABLE POTENTIAL ANALYSIS 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 145 < moo 5.0 146 < moo 5.0 147 < 10.00 5.0 148 : < 10.00 5.0 149 <' io.00 5.0 150 < 10.00 5.0 151 < moo 5.0 152 < moo 5.0 153 < 10.00 5.0 154 < 10.00 5.0 155 < lobo 5.0 156 < 10.00 5.0 157 < 10.00 5.0 158 < 10.00 5.0 159 < 10.00 5.0 160 < 10.00 5.0 161 < moo 5.0 162 < moo 5.0 163 < moo 5.0 164 < moo 5.0 165 < moo 5.0 166 < 1000 5.0 167 < 10.00 5.0 168 < moo 5.0 169 < moo 5.0 170 ' < 10.00 5.0 171 ' < 10.00 5.0 172 < moo 5.0 173 < 10.00 5.0 174 < moo 5.0 175 < moo 5.0 176 < 10.oa 5.0 177 < moo 5.0 178 < 10.00 5.0 179 < 10.00 5.0 180 < moo 5.0 181 < moo 5.0 182 < moo 5.0 183 < moo 5.0 184 < moo 5.0 185 < moo 5.0 186 < moo 5.0 187 < moo 5.0 188 < 1o.00 5.0 189 < 10.00 5.0 190 < moo 5.0 191 < moo 5.0 192 < moo 5.0 193 < 10.00 5.0 194 < moo 5.0 195 < 10.00 5.0 196 < moo 5.0 197 < 10.00 5.0 198 < 10.00 5.0 199 < 10.00 5.0 200 < 10.00 5.0 - 6 - 24325- rpa-2006, data 5/31/2006 REASONABLE POTENTIAL ANALYSIS Copper Cyanide Date Data BDL=1/2DL Results 1 1000 5.0 Std Dev. 2 10.00 5.0 Mean 3 < 10.00 5.0 C.V. 4 < 10.00 5.0 n 5 10.00 5.0 6 10.00 5.0 Mull Factor = 7 10.00 5.0 Max. Value 8 12.00 12.0 Max. Pred Cw 9 taco 10.0 10 1o.oe 5.0 11 10.00 5.0 12 11.00 11.0 13 1o.oa 10.0 14 15.00 15.0 15 18.00 5.0 16 20.00 20.0 17 13.00 13.0 18 12.00 12.0 19 10.00 5.0 20 14.00 14.0 21 10.00 5.0 22 1o.ao 5.0 23 10.00 5.0 24 10.00 5.0 25 10.00 5.0 26 13.00 13.0 27 10.00 10.0 28 10.00 5.0 29 10.00 10.0 30 11.00 11.0 31 10.00 5.0 32 < 10.00 5.0 33 r< 10.00 5.0 34 <' 10.00 5.0 35 : 10.00 5.0 36 10.00 5.0 37 '•. 10.00 10.0 38 ' < 10.00 5.0 39 < 10.00 5.0 40 < 10.00 5.0 41 < 10.00 5.0 42 < 10.00 5.0 43 12.00 12.0 44 11.00 11.0 45 < 1a.oa 5.0 46 16.00 16.0 47 1o.oa 10.0 48 11.00 11.0 49 <, 10.00 5.0 50 < 10.00 5.0 51 < 10.00 5.0 52 10.00 10.0 53 <' 10.00 5.0 54 < ; 10.00 5.0 55 10.00 10.0 56 < 10.00 5.0 57 < 10.00 5.0 58 <' 1o.ao 5.0 59 10.00 10.0 60 10.00 10.0 61 <. 10.00 5.0 62 14.00 14.0 63 14.00 14.0 64 18.00 18.0 65 20.00 20.0 66 < 1o.eo 5.0 67 < 10.00 5.0 68 < 1a.00 5.0 69 < 1o.oe 5.0 70 21.00 21.0 3.2883 6.4700 0.5082 200 1.0000 21.0 ug/L 21.0 ug/L Date Data BDL=1/2DL Results 1 < 10.00 5.0 Std Dev. 9.1123 2 < 10.00 5.0 Mean 10.5300 3 < t000 5.0 C.V. 0.8654 4 < 10.00 5.0 n 200 5 < 10.00 5.0 6 <' 10.00 5.0 Mult Factor = 1.2800 7 11.00 11.0 Max. Value 58.0 ug/L 8 22.00 22.0 Max. Pred Cw 74.2 ug/L 9 18.00 18.000 10 33.00 33.000 11 10.00 10.000 12 < 10.00 5.000 13 . < 10.00 5.000 14 < 10.00 5.0 15 < 10.0o 5.0 16 1o.ao 5.0 17 12.0 0 12.0 18 10.00 5.0 19 ,0.00 10.0 20 < moo 5.0 21 10.00 5.0 22 10.00 5.0 23 10.00 5.0 24 1100 11.0 25 1o.00 5.0 26 11.00 11.0 27 <,10.00 5.0 28 < 10.00 5.0 29 11.00 11.0 30 15.00 15.0 31 < loco 5.0 32 <,10.00 5.0 33 30.00 30.0 34 24.00 24.0 35 50.00 50.0 36 10.00 10.0 37 l< 10.00 5.0 38 `< 1o.ao 5.0 39 < 10.00 5.0 40 16.00 16.0 41 < 10.00 5.0 42 < 10.00 5.0 43 < 10.00 5.0 44 < 10.00 5.0 45 < 10.00 5.0 46 < woo 5.0 47 10,00 10.0 48 < io.00 5.0 49 16.00 16.0 50 < loon 5.0 51 18.00 18.0 52 15.00 15.0 53 10.00 10.0 54 12.00 12.0 55 < moo 5.0 56 < woo 5.0 57 18.00 18.0 58 26.00 26.0 59 I 11•00 11.0 60 <' 18.00 5.0 61 18.00 18.0 62 <' 10.00 5.0 63 <' 10.00 5.0 64 < 10.00 5.0 65 < 10.00 5.0 66 15.00 15.0 67 15.00 15.0 68 49.00 49.0 69 <.10.00 5.0 70 14.00 14.0 -7- 24325- rpa-2006, data 5/31/2006 REASONABLE POTENTIAL ANALYSIS 71 < 10.00 5.0 72 10.00 10.0 73 10.00 10.0 74 10.00 5.0 75 10.00 5.0 76 <. 10.00 5.0 77 < 10.00 5.0 78 < 10.00 5.0 79 < 10.00 5.0 80 10.00 10.0 81 "<. 10.00 5.0 82 a<10.00 5.0 83 .< 10.00 5.0 84 < 10.00 5.0 85 < 10.00 5.0 86 < 10.00 5.0 87 < io.00 5.0 88 12.00 12.0 89 < io.00 5.0 90 < 10.00 5.0 91 < 10.00 5.0 92 < 10.00 5.0 93 < 10.00 5.0 94 < 10.00 5.0 95 < 10.00 5.0 96 < 10.00 5.0 97 10,66 10.0 98 10.00 10.0 99 10.00 10.0 100 10.06 10.0 101 1606 10.0 102 < 10.06 5.0 103 < 10.00 5.0 104 < 10.00 5.0 105 < 10.60 5.0 106 < 10.00 5.0 107 < 1o.ao 5.0 108 < 1o.ao 5.0 109 < 10.00 5.0 110 < 10.00 5.0 111 < 16.00 5.0 112 <' 10.00 5.0 113 < 10.00 5.0 114 < 1o.00 5.0 115 <. 10.00 5.0 116 < 10.00 5.0 117 < 10.00 5.0 118 <: 10.00 5.0 119 < 10.00 5.0 120 < 10.00 5.0 121 <: 10.00 5.0 122 < 10.00 5.0 123 <. 10.00 5.0 124 < 10.00 5.0 125 18.00 18.0 126 <: 10.00 5.0 127 < 10.60 5.0 128 < 10.00 5.0 129 16.00 10.0 130 < 10.00 5.0 131 < 10.00 5.0 132 < 10.06 5.0 133 < 10.06 5.0 134 < 10.00 5.0 135 < 10.60 5.0 136 < 10.06 5.0 137 < 10.00 5.0 138 < 10.00 5.0 139 < 10.06 5.0 140 < 16.00 5.0 141 < 10.00 5.0 142 < 16.00 5.0 143 <. 16.66 5.0 144 < 10.00 5.0 71 10.00 10.0 72 < 10.00 5.0 73 < 10.00 5.0 74 <10.06 5.0 75 30.00 30.0 76 13.00 13.0 77 < 10.06 5.0 78 < 10.00 5.0 79 < 10.00 5.0 80 . < 10.00 5.0 81 33.00 33.0 82 21.00 21.0 83 25.00 25.0 84 34.00 34.0 85 25.00 25.0 86 16.00 16.0 87 11.00 11.0 88 17.00 17.0 89 13.00 13.0 90 12.00 12.0 91 12.00 12.0 92 25.00 25.0 93 < 10.00 5.0 94 23.00 23.0 95 10.00 10.0 96 '<10.00 5.0 97 18.00 18.0 98 < 10.00 5.0 99 58.00 58.0 100 20.00 20.0 101 21.00 21.0 102 27.00 27.0 103 35.00 35.0 104 23.00 23.0 105 13.00 13.0 106 11.00 11.0 107 11.00 11.0 108 11.00 11.0 109 25.00 25.0 110 13.00 13.0 111 11.00 11.0 112 1000 16.0 113 22.00 22.0 114 12.00 12.0 115 < 10.06 5.0 116 16.00 16.0 117 < 10.00 5.0 118 < 10.00 5.0 119 12.00 12.0 120 44.00 44.0 121 24.00 24.0 122 < 10.00 5.0 123 20.00 20.0 124 16.00 16.0 125 < 10.00 5.0 126 < 10.00 5.0 127 < 10.00 5.0 128 < 10.00 5.0 129 < 10.00 5.0 130 < 10.00 5.0 131 < 10.00 5.0 132 < loco 5.0 133 < 10.00 5.0 134 < 10.00 5.0 135 < 16.60 5.0 136 < 10.00 5.0 137 < 10.00 5.0 138 < 10.00 5.0 139 < 10.00 5.0 140 < 10.00 5.0 141 < 10.00 5.0 142 < 10.00 5.0 143 < 10.00 5.0 144 10.00 10.0 24325- rpa-2006, data - 8 - 5/31/2006 REASONABLE POTENTIAL ANALYSIS 145 10.00 5.0 146 10.00 5.0 147 11.o0 11.0 148 < 10.00 5.0 149 '< 10.00 5.0 150 < moo 5.0 151 < moo 5.0 152 < 10.00 5.0 153 '< 10.00 5.0 154 P< tom 5.0 155 .< moo 5.0 156 < 10.00 5.0 157 < moo 5.0 158 moo 5.0 159 tom 5.0 160 moo 5.0 161 10.00 5.0 162 10.00 5.0 163 10.00 5.0 164 10.00 5.0 165 moo 5.0 166 10.00 5.0 167 10.00 5.0 168 10.00 5.0 169 10.00 5.0 170 10.00 5.0 171 tom 5.0 172 tom 5.0 173 10.00 5.0 174 10.00 5.0 175 10.00 5.0 176 moo 5.0 177 < 10.00 5.0 178 < 10.00 5.0 179 < 10.00 5.0 180 < moo 5.0 181 < 10.00 5.0 182 < 10.00 5.0 183 < 10.00 5.0 184 < 10.00 5.0 185 < 10.00 5.0 186 < 10.00 5.0 187 ' < 10.00 5.0 188 < moo 5.0 189 too 1.0 190 < 10.00 5.0 191 < moo 5.0 192 < 10.00 5.0 193 14.00 14.0 194 < 10.00 5.0 195 < moo 5.0 196 < moo 5.0 197 ' < 1000 5.0 198 < 10.00 5.0 199 < 10.00 5.0 200 < 10.00 5.0 145 < to.00 5.0 146 < 10.00 5.0 147 < 10.00 5.0 148 <'moo 5.0 149 < 10.00 5.0 150 < 10.00 5.0 151 < moo 5.0 152 < 10.00 5.0 153 <,10.00 5.0 154 < 10.00 5.0 155 <,10.00 5.0 156 < moo 5.0 157 < moo 5.0 158 < 10.00 5.0 159 <10.00 5.0 160 13.00 13.0 161 <.10.00 5.0 162 < 10.00 5.0 163 < 10.00 5.0 164 19.00 19.0 165 < 1o.00 5.0 166 < 10.00 5.0 167 <-t0.00 5.0 168 < 10.00 5.0 169 11.00 11.0 170 17.00 17.0 171 < 10.00 5.0 172 < 10.00 5.0 173 < 10.00 5.0 174 < 10.00 5.0 175 < 10.00 5.0 176 < 10.00 5.0 177 < 10.00 5.0 178 <:10.00 5.0 179 < 10.00 5.0 180 14.00 14.0 181 <10.00 5.0 182 <jl0.00 5.0 183 <,10.00 5.0 184 < 110.00 5.0 185 <;tom 5.0 186 < ,10.00 5.0 187 18.00 18.0 188 moo 10.0 189 19.00 19.0 190 <10.00 5.0 191 12.00 12.0 192 13.00 13.0 193 <. t 0.00 5.0 194 , 10.00 10.0 195 <;10.00 5.0 196 '<10.00 5.0 197 <.10.00 5.0 198 ' <; 10.00 5.0 199 <',10.00 5.0 200 ' <:10.00 5.0 -9- 24325- rpa-2006, data 5/31 /2006 REASONABLE POTENTIAL ANALYSIS Fluoride Lead Date Data BDL=1/2DL Results 650.00 650.0 Std Dev. 299.6785 850.00 850.0 Mean 623.6000 700.00 700.0 C.V. 0.4806 580.00 580.0 n 50 760.00 760.0 820.00 820.0 Mult Factor = 1.5600 620.00 820.0 Max. Value 2100.0 ug/L 730.00 730.0 Max. Pred Cw 3276.0 ug/L 650.00 650.0 770.00 770.0 380.00 380.0 720.00 720.0 610.00 610.0 720.00 720.0 630.00 630.0 790.00 790.0 540.00 540.0 630.00 630.0 620.00 620.0 510.00 510.0 500.00 500.0 700.00 700.0 600.00 600.0 700.00 700.0 900.00 900.0 800.00 800.0 600.00 600.0 600.00 600.0 500.00 250.0 2100.00 2100.0 100.00 50.0 900.00 900.0 200.00 200.0 500.00 250.0 500.00 250.0 500.00 250.0 100.00 50.0 700.00 700.0 700.00 700.0 800.00 800.0 700.00 700.0 600.00 600.0 700.00 700.0 800.00 800.0 700.00 700.0 600.00 600.0 600.00 600.0 400.00 400.0 300.00 300.0 400.00 400.0 Date Data BDL=1/2DL Results < 25.00 12.5 Std Dev. 0.0000 < 25.00 12.5 Mean 12.5000 < 25.00 12.5 C.V. 0.0000 < 25.00 12.5 n 49 < 25.00 12.5 < 25.00 12.5 MuItFactor = 1.0000 < 25.00 12.5 Max. Value 12.5 ug/L < 25.00 12.5 Max. Pred Cw 12.5 ug/L < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 < 25.00 12.5 24325- rpa-2006, data - 10 - 5/31/2006 REASONABLE POTENTIAL ANALYSIS Mercury Nickel Date Data BDL=1/2DL Results 1 < i 0.5 Std Dev. 4.0483 2 < 1 0.5 Mean 4.4882 3 5.2 5.2 C.V. 0.9020 4 5.4 5.4 n 102 5 4.7 4.7 6 5.4 5.4 Mult Factor = 1.61 7 1.7 1.7 Max. Value 31.0 ng/L 8 2.3 2.3 Max. Pred Cw 49.9 ng/L 9 2.8 2.8 10 2.4 2.4 11 2.3 2.3 12 3.8 3.8 13 2.2 2.2 14 3.8 3.8 15 < 1 0.5 16 1. 1.0 17 2.4 2.4 18 2. 2.0 19 5.4 5.4 20 2.8 2.8 21 4.2 4.2 22 5.1 5.1 23 3. 3.0 24 6.3 6.3 25 3.4 3.4 26 3.7 3.7 27 12.2 12.2 28 2.8 2.8 29 4.6 4.6 30 52 5.2 31 1s. 15.0 32 6.9 6.9 33 3.6 3.6 34 8. 8.0 35 3.9 3.9 36 2.4 2.4 37 3.6 3.6 38 2.9 2.9 39 4. 4.0 40 4. 4.0 41 3.4 3.4 42 3.2 3.2 43 14.1 14.1 44 2.4 2.4 45 2.7 2.7 46 3. 3.0 47 3.4 3.4 48 2.2 2.2 49 2.7 2.7 50 3. 3.0 51 2.4 2.4 52 3.2 3.2 53 5.7 5.7 54 3.5 3.5 55 2.5 2.5 56 31. 31.0 57 7.7 7.7 58 5.4 5.4 59 6.9 6.9 60 2.3 2.3 61 2.4 2.4 62 2.9 2.9 63 6.7 6.7 64 42 4.2 65 2.4 2.4 66 2.4 2.4 67 2.6 2.6 68 3.8 3.8 69 8.1 8.1 70 4.3 4.3 Date Data BDL=1/2DL Results 1 13.00 13.0 Std Dev. 11.0509 2 61.00 61.0 Mean 10.4171 3 15.00 15.0 C.V. 1.0608 4 20.00 20.0 n 199 5 53.00 53.0 6 36.00 36.0 MuIt Factor = 1.3300 7 19.00 19.0 Max. Value 91.0 ug/L 8 31.00 31.0 Max. Pred Cw 121.0 ug/L 9 11.00 11.0 10 31.00 31.0 11 26.00 26.0 12 13.00 13.0 13 12.00 12.0 14 < 10.00 5.0 15 17.00 17.0 16 25.00 25.0 17 12.00 12.0 18 17.00 17.0 19 29.00 29.0 20 27.00 27.0 21 21.00 21.0 22 13.00 13.0 23 29.00 29.0 24 13.00 13.0 25 10.00 10.0 26 ' 10.00 10.0 27 10.00 10.0 28 < 10.00 5.0 29 < 10.00 5.0 30 10.00 10.0 31 ,<, 10.00 5.0 32 18.00 18.0 33 35.00 35.0 34 11.00 11.0 35 23.00 23.0 36 < 10.00 5.0 37 < 10.00 5.0 38 < 10.00 5.0 39 < 10.00 5.0 40 < 10.00 5.0 41 < 10.00 5.0 42 41.00 41.0 43 23.00 23.0 44 < ' 10.00 5.0 45 10.00 10.0 46 < 10.00 5.0 47 12.00 12.0 48 ; < 10.00 5.0 49 < 10.00 5.0 50 I 11.00 11.0 51 < 10.00 5.0 52 10.00 10.0 53 < 10.00 5.0 54 20.00 20.0 55 < 10.00 5.0 56 : < 10.00 5.0 57 : < i 10.00 5.0 58 < ! 10.00 5.0 59 < . 10.00 5.0 60 < ' 10.00 5.0 61 < i 10.00 5.0 62 < , 10.00 5.0 63 91.00 91.0 64 < 10.00 5.0 65 < 10.00 5.0 66 < 10.00 5.0 67 < 10.00 5.0 68 . < 10.00 5.0 69 10.00 10.0 70 < 10.00 5.0 24325- rpa-2006, data - 13 - 5/31/2006 REASONABLE POTENTIAL ANALYSIS 71 4.3 4.3 72 4.6 4.6 73 2.5 2.5 74 3. 3.0 75 5.3 5.3 76 7.9 7.9 77 2.7 2.7 78 22 2.2 79 2.2 2.2 80 2.4 2.4 81 6.1 6.1 82 6.4 6.4 83 2. 2.0 84 23.5 23.5 85 4.4 4.4 86 6.1 6.1 87 5.4 5.4 88 22 2.2 89 3.1 3.1 90 3.8 3.8 91 5.4 5.4 92 2.8 2.8 93 3.1 3.1 94 3.8 3.8 95 2.6 2.6 96 3.4 3.4 97 7. 7.0 98 2.8 2.8 99 2.4 2.4 100 4.8 4.8 101 4.1 4.1 102 3.1 3.1 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 71 < loo0 5.0 72 < to.00 5.0 73 < to.00 5.0 74 < io.00 5.0 75 < io.00 5.0 76 < 10.00 5.0 77 < to.00 5.0 78 < 10.00 5.0 79 < 10.00 5.0 80 < io.00 5.0 81 < io.00 5.0 82 < 10.00 5.0 83 < io.00 5.0 84 < 1a.o0 5.0 85 46.00 48.0 86 12.00 12.0 87 < to.00 5.0 88 < 10.00 5.0 89 < 10.00 5.0 90 < 10.00 5.0 91 < moo 5.0 92 • < 10.00 5.0 93 < io.00 5.0 94 : < 10.00 5.0 95 . < io.00 5.0 96 < to.00 5.0 97 < 1o.00 5.0 98 < 10.00 5.0 99 < io.00 5.0 100 14.00 14.0 101 < 10.00 5.0 102 < 10.00 5.0 103 < 10.00 5.0 104 < 10.00 5.0 105 ' < 10.00 5.0 106 < 1o.o0 5.0 107 , < io.00 5.0 108 < 10.00 5.0 109 < 10.00 5.0 110 19.00 19.0 111 < 10.00 5.0 112 ` < • io.00 5.0 113 ' < io.00 5.0 114 < 10.00 5.0 115 , < to.00 5.0 116 < lam 5.0 117 16.00 16.0 118 22.00 22.0 119 moo 11.0 120 c 10.0o 5.0 121 < io.00 5.0 122 < io.00 5.0 123 < 1 o.00 5.0 124 < 10.00 5.0 125 < to.00 5.0 126 < to.00 5.0 127 z i to.00 5.0 128 < 10.00 5.0 129 ` 10.00 5.0 130 26.00 26.0 131 13.00 13.0 132 17.00 17.0 133 17.00 17.0 134 < 10.00 5.0 135 20.00 20.0 136 15.00 15.0 137 < to.00 5.0 138 16.00 16.0 139 12.00 12.0 140 < ' moo 5.0 141 < • 10.00 5.0 142 < io.00 5.0 143 < 10.00 5.0 144 15.00 15.0 -14- 24325- rpa-2006, data 5/31/2006 REASONABLE POTENTIAL ANALYSIS 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 145 < to.00 5.0 146 • < to.00 5.0 147 < to.00 5.0 148 < 1n.00 5.0 149 10.00 10.0 150 < 10.00 5.0 151 12.00 12.0 152 < . to.00 5.0 153 < 10.00 5.0 154 • < 10.00 5.0 155 < 1o.00 5.0 156 < to.00 5.0 157 • < 10.00 5.0 158 < tom 5.0 159 < to.00 5.0 160 < to.00 5.0 161 < to.00 5.0 162 20.00 20.0 163 21.00 21.0 164 29.00 29.0 165 < to.00 5.0 166 < to.00 5.0 167 < 10.00 5.0 168 < to.00 5.0 169 < to.00 5.0 170 < to.00 5.0 171 < to.00 5.0 172 < t0.00 5.0 173 < 10.00 5.0 174 < 10.00 5.0 175 < 10.00 5.0 176 16.00 16.0 177 < 10.00 5.0 178 10.00 10.0 179 < to.00 5.0 180 < to.00 5.0 181 < to.00 5.0 182 < 10.00 5.0 183 20.00 20.0 184 19.00 19.0 185 < to.00 5.0 186 < to.00 5.0 187 < 10.00 5.0 188 < to.00 5.0 189 12.00 12.0 190 < 10.00 5.0 191 < to.00 5.0 192 12.00 12.0 193 < 10.00 5.0 194 < to.00 5.0 195 < • to.00 5.0 196 ' '< 10.00 5.0 197 45.00 45.0 198 < 10.0o 5.0 199 < 10.00 5.0 200 24325- rpa-2006, data - 15 - 5/31 /2006 REASONABLE POTENTIAL ANALYSIS Selenium Zinc Date Data BDL=1/2DL Results < 10.00 5.0 Std Dev. 0.0000 < 10.00 5.0 Mean 5.0000 < 10.00 5.0 C.V. 0.0000 < 10.00 5.0 n 15 < 10.00 5.0 < 10.00 5.0 Mult Factor = 1.0000 ,< 10.00 5.0 Max. Value 5.0 ug/L < 10.00 5.0 Max. Pred Cw 5.0 ug/L < 10.00 5.0 < 10.00 5.0 < 10.00 5.0 < 10.00 5.0 < 10.00 5.0 < 10.00 5.0 < 10.00 5.0 Date Data BDL=I/2DL Results 1 41.00 41.0 Std Dev. 27.2167 2 67.00 67.0 Mean 82.9550 3 74.00 74.0 C.V. 0.3281 4 73.00 73.0 n 200 5 62.00 62.0 6 77.00 77.0 Mult Factor = 1.0000 7 70.00 70.0 Max. Value 192.0 ug/L 8 95.00 95.0 Max. Pred Cw 192.0 ug/L 9 89.00 89.0 10 90.00 90.0 11 64.00 64.0 12 117.00 117.0 13 107.00 107.0 14 97.00 97.0 15 91.00 91.0 16 175.00 175.0 17 137.00 137.0 18 171.00 171.0 19 56.00 56.0 20 127.00 127.0 21 102.00 102.0 22 72.00 72.0 23 81.00 81.0 24 65.00 65.0 25 115.00 115.0 26 137.00 137.0 27 98.00 98.0 28 28.00 28.0 29 168.00 168.0 30 138.00 138.0 31 152.00 152.0 32 52.00 52.0 33 107.00 107.0 34 99.00 99.0 35 72.00 72.0 36 66.00 66.0 37 57.00 57.0 38 83.00 83.0 39 68.00 68.0 40 67.00 67.0 41 116.00 116.0 42 115.00 115.0 43 81.00 81.0 44 71.00 71.0 45 98.00 98.0 46 1 103.00 103.0 47 156.00 156.0 48 130.00 130.0 49 126.00 126.0 50 107.00 107.0 51 146.00 146.0 52 82.00 82.0 53 110.00 110.0 54 130.00 130.0 55 108.00 108.0 56 112.00 112.0 57 76.00 76.0 58 65.00 85.0 59 104.00 104.0 60 62.00 82.0 61 69.00 69.0 62 90.00 90.0 63 ; 1 92.00 92.0 64 98.00 98.0 65 97.00 97.0 66 99.00 99.0 67 86.00 86.0 68 105.00 105.0 69 192.00 192.0 70 58.00 58.0 -16- 24325- rpa-2006, data 5/31 /2006 REASONABLE POTENTIAL ANALYSIS 71 84.00 84.0 72 100.00 100.0 73 112.00 112.0 74 107.00 107.0 75 87.00 87.0 76 108.00 108.0 77 99.00 99.0 78 92.00 92.0 79 141.00 141.0 80 112.00 112.0 81 91.00 91.0 82 95.00 95.0 83 127.00 127.0 84 89.00 89.0 85 89.00 89.0 86 71.00 71.0 87 74.00 74.0 88 75.00 75.0 89 92.00 92.0 90 100.00 100.0 91 94.00 94.0 92 86.00 86.0 93 95.00 95.0 94 70.00 70.0 95 56.00 56.0 96 84.00 84.0 97 61.00 61.0 98 6600 66.0 99 38.00 38.0 100 72.00 72.0 101 83.00 83.0 102 85.00 85.0 103 138.00 138.0 104 93.00 93.0 105 98.00 98.0 106 91.00 91.0 107 104.00 104.0 108 88.00 88.0 109 76.00 76.0 110 76.00 76.0 111 66.00 66.0 112 73.00 73.0 113 49.00 49.0 114 58.00 58.0 115 58.00 58.0 116 56.00 56.0 117 77.00 77.0 118 81.00 81.0 119 61.00 61.0 120 83.00 83.0 121 70.00 70.0 122 55.00 55.0 123 72.00 72.0 124 58.00 58.0 125 74.80 74.0 126 62.00 62.0 127 80.00 80.0 128 53,00 53.0 129 89.00 89.0 130 60.00 60.0 131 49.00 49.0 132 69.00 69.0 133 78.00 78.0 134 70.00 70.0 135 62.00 62.0 136 75.00 75.0 137 74.00 74.0 138 69.00 69.0 139 50.00 50.0 140 69.00 69.0 141 94.00 94.0 142 76.00 76.0 143 87.00 87.0 144 74.00 74.0 24325- rpa-2006, data - 17 - 5/31/2006 REASONABLE POTENTIAL ANALYSIS 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 145 44.00 44.0 146 39.00 39.0 147 62.00 62.0 148 66,00 66.0 149 88.00 88.0 150 48.00 48.0 151 64.00 64.0 152 79.00 79.0 153 86.00 86.0 154 58.00 58.0 155 85.00 85.0 156 45.00 45.0 157 75.00 75.0 158 52.00 52.0 159 74.00 74.0 160 85.00 85.0 161 82.00 82.0 162 65.00 65.0 163 69.00 69.0 164 48.00 48.0 165 66.00 66.0 166 98.00 96.0 167 95.00 95.0 168 99.00 99.0 169 14s.00 145.0 170 76.00 76.0 171 92.00 92.0 172 59.00 59.0 173 78.00 78.0 174 80.00 80.0 175 73.00 73.0 176 70.00 70.0 177 80.00 80.0 178 79.00 79.0 179 52.00 52.0 180 61.00 61.0 181 62.00 62.0 182 73.00 73.0 183 66.00 66.0 184 64,00 64.0 185 58.00 58.0 186 50.00 50.0 187 57.00 57.0 188 67.00 67.0 189 67.00 67.0 190 83.00 63.0 191 59.00 59.0 192 68.00 66.0 193 61.00 61.0 194 61.00 61.0 195 64.00 64.0 196 62.00 62.0 197 61.00 61.0 198 58.00 58.0 199 45.00 45.0 200 51.00 51.0 - 18 - 24325- rpa-2006, data 5/31/2006 NPDES/Non-Discharge Permitting Unit Pretreatment Information Request Form NPDES OR NONDISCHARGE PERMITTING UNIT COMPLETES THIS PART: Date of Request 5/24/2006 Facility North Buffalo Permit # NC0024325 Region Winston-Salem Requestor Segei Chemikov Pretreatment Catawba, Neuse, New - Dana Folley (ext. 523) Contact By Broad, Lumber, Yadkin - Jon Risgaard (ext. 580) River Basin Cape Fear, Little Tennessee, Tar-Pamilco- Deborah Gore (ext. 593) Chowan, French Broad, Hiwassee, Roanoke - Daryl Merritt (ext. 554) COMMENTS TO PRETREATMENT UNIT: PRETREATMENT UNIT COMPLETES THIS PART: Status of Pretreatment Program (circle all that apply) 3) the facility has (or is developing) a Pretreatment Program 3a) is Full Program with LTMP Flow Permitted MGD Actual MGD Industrial 0.3565 0.1467 Domestic L (S) T MP Pollutant Check List POC due to NPDES/Non- Discharge Permit Limit Required by EPA' Required by 503 Sludge" POC due to SIU`" Site specific POC (Provide Explanation)"" STMP Frequency at effluent LTMP Frequency at effluent CBOD X Q TSS X Q NH3 X Q Arsenic X Q -1 Zadr ju . p = _ Ni x Q 4 000:Mi00_. ` _ ,/ x Q ,% DopWl_ _:____ 4 Q Cyanide X Q ,%{Leadl.....__._ 4 X Q Mercury X X Q Molybdenum Q 4 .nickel: _ :_ ,% X Q Silver X Q Selenium X Q -f Zinc _ 4 Q Tot Phosphorus X Q Beryllium X Q Iron X Q Q . Q Q Q _ tikholdys in the LTMP "Only in the LTMP if the POTW land applies sludge •" Only in LTMP while the SIU is connected to the POTW ""' Only in LTMP when the pollutant is a specific concern to the POTW (ex -Chlorides for a POTW who accepts Textile waste) Q= Quarterly all LTMP/STMP effluent data on DMRs? Yes X No (attach data) Comments: Greensboro incinerates their sludge. NB's last HWA was done available in spreadsheet? — in 2002 so the data available in the computer files is from 2001 and Yes No X _ earlier. version 10/8I03 PIRF 24325 Revised: August 4, 2000 WATER Resources City of Greensboro Certified Mail 7005 1820 0006 7147 8556 Return Receipt Requested July 7, 2006 [Emailed: 7-7-2006] Mr. Sergei Chernikov North Carolina Department of Environment and Natural Resources NPDES Unit 1617 Mail Service Center Raleigh, North Carolina 27699 Re: Comments on Draft NPDES Permit NC0024325 North Buffalo WWTP-Guilford County Dear Mr. Chernikov, This purpose of this correspondence is to document the City of Greensboro Water Resources Department comments on the draft NPDES Permit for the North Buffalo Wastewater Treatment Facility. The City of Greensboro comments are as follows: Supplement to Permit Cover Sheet Item #1-Correction of List of treatment components The treatment train in the current draft is incorrect. An updated treatment train list was provided to DWQ in correspondence dated 2-23-2004 as part of final comments on the last renewal of NPDES Permit NC0024325. Please include the following updated process train list in the final North Buffalo NPDES permit. North Buffalo POTWProcess Train Description Mechanical Bar Screen Influent Flow Measurement (Parshall Flume) Aerated Grit Removal Primary Settling Tanks (4) 6 MGD flow transfer station to T. Z. Osborne From here the flow continues through one of the following treatment trains: Original Train #2 Train [with high -flow diversion operational mode] Activated Sludge with nitrification (1) Trickling Filters (2) Secondary Clarifiers (2) Activated Sludge with Nitrification (4 aeration basins with fine bubble diffusers) Step feed process [optional] �t Chemical Addition for Phosphorus Removal Secondary Clarifiers (5) J U L 1 1 2006 Df NR - WATER QUALITY POINT SOURCE BRANCH North Buffalo Draft NPDES Permit [NC0024325J Comments Page 2 Correspondence of July 7, 2006 The flows from the two separate trains come together and continue through the following common treatment processes: Effluent Sand Filters (4) Effluent Flow Measurement (Parshall flume) Chlorination Effluent Aeration Part A. (1) Effluent Limitations and Monitoring Requirements Fluoride Limit and Monitoring Requirements • Fluoride Reasonable Potential Analysis - From 1-1-2002 through 12-31-2005, the North Buffalo facility reported 29 effluent fluoride analyses. One fluoride value (2.1 mg/1 reported on 6-4-2003) would have exceeded the proposed limit in the draft permit. The next highest value was 0.9 mg/1 and the average of the 29 values is 0.6 mg/1. We have no industrial source of fluoride to the North Buffalo facility and are at a loss to explain the value in June 2003. Fluoride testing is conducted by an outside commercial laboratory. We are willing to take a fluoride limit and weekly monitoring for one year with the provision that we may petition DWQ to have the limit removed at the end of that year if the data indicates no reasonable potential exists for an exceedance of the limit. • Fluoride Limit Value — As per our telephone conversation of 7-6-2006, please change/correct the fluoride limit to 1865.0 ug/1 and then convert the limit to milligrams per liter (mg/L). It is not possible to measure micrograms per liter of fluoride to five significant figures. In addition, the North Carolina water quality standard for fluoride is expressed as 1.8 mg/L, not 1800.0 ug/1. Therefore, we request that the NPDES limit be expressed as 1.9 mg/L. (Please note this is the same limit included in a previous North Buffalo NPDES permit issued by DWQ on December 1, 1993.) Total Nitrogen and Total Phosphorus Monitoring Frequency • We request that the total nitrogen and total phosphorus monitoring frequency remain at once per week. In recent meetings (June 2006) concerning the Jordan Lake reservoir, DWQ staff stated that lack of resources would prevent them from conducting any additional modeling studies on nutrient response in Jordan Lake. Therefore, we feel that increased monitoring of point source loading is not warranted. If DWQ develops a specific modeling plan schedule and commits in writing to conduct additional nutrient response modeling on Jordan Lake for the purpose of determining the appropriate point source nutrient target loadings, we will gladly conduct three times per week nutrient monitoring for the two year period required to calibrate and validate a new nutrient response model. North Buffalo Draft NPDES Permit [NC0024325J Comments Page 3 Correspondence of July 7. 2006 ■ The NPDES permits of major dischargers to the Nutrient Sensitive Neuse River and the Tar -Pamlico River basins contain once per week nutrient monitoring for total phosphorus and total nitrogen. The same criteria should be used in the Upper Cape Fear Basin. ■ We attended the 7-7-2006 meeting in Graham between DWQ staff and Jordan Lake watershed NPDES permittees to discuss the nutrient monitoring frequency issue. We look forward to working together to develop a solution agreeable to both parties. Part A. (5) Effluent Pollutant Scan ■ Does DWQ propose that two -species bioassay analyses be conducted in conjunction with each of the required annual Effluent Pollutant Scans? Form 2A requires 3 pollutant scans and 4 two -species bioassay tests. Although the permit cover letter states that the annual pollutant scan can be conducted concurrent with toxicity testing, there does not appear to be any permit language in the draft permit that outlines that requirement and there is no mention of two -species whole effluent toxicity testing. Please provide additional information to clarify this requirement. • The DWQ annual pollutant scan permit condition exceeds the EPA requirement. We request that the permit condition be changed to the original EPA requirement of three priority pollutant scans. • The draft permit cover letter from DWQ states that the annual pollutant scans can be used "for the new renewal application required by the Environmental Protection Agency". NPDES Form 2A states that only 3 scans are required and that the data used can be "no more than four and one half years old". Previous DWQ correspondence also used the 4.5 year window. However, the document entitled "Instructions for completing Form 2A" published by EPA in the Federal Register Wednesday, August 4, 1999 contains the following statement in Appendix A -Guidance for Completing the Effluent Testing Information; All Treatment Works: "All data provided in the application must be based on samples taken within three years prior to the time of this permit application." Please provide documentation that DWQ has determined, in conjunction with EPA, that it is legally permissible to submit data that is more than 3 years old on Form 2A. A.(4) Calculation of Mass Loads • Please provide DMR parameter code numbers for the Total Nitrogen and Total Phosphorus monthly mass load calculations values, the Total Nitrogen and Total Phosphorus yearly mass loading calculation values and the total monthly flow values required to be reported on DMRs. North Buffalo Draft NPDES Permit [NC0024325J Comments -Page 4 Correspondence of July 7, 2006 Thank you for the opportunity to comment on the draft North Buffalo NPDES permit. If you have any questions or need additional information, please do not hesitate to contact me at 336-433-7229 or by email at martie.groome@ci.greensboro.nc.us Sincerely, .\&0-1kial.) Martie Groom cc: Allan Williams, Director of Water Resources [via email] Don Howard, Water Reclamation Manager [via email] Barbara Hicks, ORC-North Buffalo POTW [via email] Steve Tedder, Supervisor Winston-Salem DWQ Regional Office [via email] J'ctev sti, UNITED STATES ENVIRONMENTAL PROTECTION AGENCY � A Yz REGION 4 ATLANTA FEDERAL CENTER 3� �o? 61 FORSYTH STREET �rq< Pgcit -- ATLANTA, GEORGIA 30303-8960 JdN 2 9 2006 Sergei Chernikov, Ph.D North Carolina Department of Environment and Natural Resources Division of Water Quality NPDES Unit 1617 Mail Service Center Raleigh, NC 27699-1617 SUBJ: Draft NPDES Permit North Buffalo Creek WWTP Permit No. NC0024325 Dear Dr. Chernikov: In accordance with the EPA/NCDENR MOA, we have completed review of the draft permit referenced above and have no comments. We request that we be afforded an additional review opportunity only if significant changes are made to the draft permit prior to issuance or if significant comments objecting to the permit are received. Otherwise, please send us one copy of the final permit when issued. Sincerely, Marshall Hyatt, Environmental Scientist Permits, Grants, and Technical Assistance Branch Water Management Division CEO E JUL 5 2006 DENR • WATER QUALITY POINT SOURCE BRANCH Internet Address (URL) • http://www.epa.gov Recycled/Recyclable • Printed with Vegetable Oil Based Inks on Recycled Paper (Minimum 30% Postconsumer) News & Record North Carolina, Guilford County Published by News & Record, Inc. Greensboro, North Carolina Affidavit of Publication 6/12/2006 Before the undersigned, a Notary Public of said County and State, duly commissioned, qualified and authorized by law to administer oaths, personally appeared the Publisher's Representative who being first duly sworn, deposed and says: 1. That he/she is the Publisher's Representative of the Greensboro News & Record, Inc. a corporation, engaged in the publication of newspapers known as "News & Record", published, issued and entered as second class mail in the City of Greensboro in said County and State. 2. That he/she is authorized to make this affidavit and sworn statement; that the notice or other legal advertisement, a copy of which is attached hereto, was published in the News & Record on the dates listed below. 3. That the said newspaper (or newspapers) 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 1-597 of the General Statutes of North Carolina and was a qualified newspaper within the meaning of Section 1-597 of the General Statutes of North Carolina. Publisher's Representative Sworn to and subscribed before me, this 1 day of %\onti- rfv\idt Notary Public My commission expires: August 23, 2010 VALERIE MCNEIL , 2006. NOTARY PUBLIC GUILFORD COUNTY, NC COMM. EXP. 8-23-2010 Name Ad # Date Edition Class PO Ad Copv NCDENR DWQ NPDES 8398637 06/10/06 News & Record 400 PERMITS PUBLIC NOTICESTATE 0 Ad # 18398637 Date 106/09/2006 Time 11:52 PM PUBLIC NOTICE STATE OF NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION/ NPDES UNIT 1617 MAIL SERVICE CENTER RALEIGH, NC 27699-1617 NOTIRCATION OF INTENT TO ISSUE A NPDES WASTEWATER PERMIT On the basis of thorough staff review and appli- cation of NC General Statute 143.21, Public law 92-500 and other lawful standards and regula- tions, the North Carolina Environmental Man- agement Commission proposes to issue a Na- tional Pollutant Discharge Elimination System (NPD ES) wastewater discharge permit to the person(s) listed below effective 45 days from the publish date of this notice Written comments regarding the proposed per- mit will be accepted until 30 days after the publish date of this notice. All comments re- ceived prior to that date are considered in the final determinations regarding the proposed permit. The Director of the NC Division of Wa- ter Quality may decide to hold a public meet- ing 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 condi- tions present in the draft permit are available upon request and payment of the costs of re- production. Mail comments and/or requests for information to the NC Division of Water Qual- ity at the above address or call the Point Source Branch at (919) 733-5083, extension 363. Please indude the NPD ES permit number (attached) in any communication. Interested persons may also visit the Division of Water Quality at 512 N. Salisbury Street, Raleigh, NC 27604-1148 be- tween the hours of 8:00 a.m. and 5:00 p.m. to review information on file. City of Greensboro, North Buffalo WWTP in Guil- ford County, has applied for a modification to their NPDES Permit No. NC0024325. This modifi- cation would extend a compliance schedule. This facility discharges to North Buffalo Creek in the Cape ear River Basin. Quarterstone Farm Homeowners Association (PO Box 27447, Greensboro, NC 27429) has applied for renewal of NPDES permit NC0066966 for Quarterstone Farms WWTP in Guilford County. This permitted facility discharges treated wastewater to Buffalo Creek in the Cape Fear River Basin. Some parameters may be water quality limited, which may affect future alloca- tions in this portion of the Cape Fear River Ba- sin. NPDES Permit Number NC0000795, Kinder Mor- gan Southeast Terminals LLC, Greensboro Ter- minal 1 has applied for a permit renewal for a facility located in Guilford County discharging treated wastewater into an Unnamed Tributary of the East Fork Deep River in the Cape Fear River Basin. Currently, no parameters are water quality limited., however this discharge may af- fect future allocations in this portion of the re- ceiving stream. NPDES Permit Number NC0022209, Motiva En- terprise LLC, Greensboro Terminal has applied for a permit renewal for a facility located in Guilford County discharging treated wastewa- ter into an Unnamed Tributary of Long Branch Creek in the Cape Fear River Basin. Currently, no parameters are water quality limited, however this discharge may affect future allocations in this portion of the receiving stream. The City of High Point (P.O. Baa 230, High Point, NC 27261) has applied for renewal of NPD ES permit number NC0081256 for the Frank L. Ward WTP in Guilford County. This permitted facility discharges treated wastewater to in the Richland Creek in the Cape Fear River Basin. Some parameters may be water quality limited, which may affect future allocations in this por- tion of the Cape Fear River Basin. Ad shown is not actual print size imap://sergei. chemikov%40dwq. denr.ncmail.net@cros.ncrnail.net:143/... , Subject: Draft Permit reviews (2) From: John Giorgino <john.giorgino@ncmail.net> Date: Mon, 26 Jun 2006 10:50:09 -0400 To: sergei chernikov <sergei.chernikov@ncmail.net> Hi Sergei, I have reviewed the following: NC0038377 Mayo Getting back to you late on this. NC0024325 N Buffalo I have no comments. Thanks for forwarding them. John Giorgino Environmental Biologist North Carolina Division of Water Quality Environmental Sciences Section Aquatic Toxicology Unit Mailing Address: 1621 MSC Raleigh, NC 27699-1621 Office: 919 733-2136 Fax: 919 733-9959 "The real work of men was hunting meat. The invention of agriculture was a giant step in the wrong direction, leading to serfdom, cities, and empire. From a race of hunters, artists, warriors, and tamers of horses, we degraded ourselves to what we are now: clerks, functionaries, laborers, entertainers, processors of information." - Edward Abbey 1 of 1 6/26/2006 12:21 PM PERMIT OWNER FACILITY COUNTY CASE# Parameter AssessDate 11/30/2000 PENALTY$ $ 792.00 ' PAID$ $ 792.00 NC0024325 City of Greensboro North Buffalo Creek WWTP Guilford LV-2000-0491 NC0024325 City of Greensboro North Buffalo Creek WWTP Guilford LV-2001-0077 03/21/2001 $ 542.00 $ 542.00 $ 542.00 NC0024325 City of Greensboro North Buffalo Creek WWTP Guilford LV-2001-0142 04/30/2001 $ 542.00 NC0024325 City of Greensboro North Buffalo Creek WWTP Guilford LV-2001-0242 07/03/2001 $ 1,042.00 $ 1,042.00 NC0024325 City of Greensboro North Buffalo Creek WWTP Guilford LV-2001-0545 12/17/2001 $ 542.00 $ 542.00 NC0024325 City of Greensboro North Buffalo WWI?' Guilford LV-2002-0121 04/26/2002 $ 1,300.50 NC0024325 City of Greensboro North Buffalo Creek WWTP Guilford LV-2002-0160 . 05/17/2002 $ 570.50 $ 570. 0 NC0024325 City of Greensboro North Buffalo Creek WWTP Guilford LV-2003-0170 03/05/2003. $ 826.00 $ 826. 0 N 0024325 City o Greensboro North Buffalo Creek WWTP Guilford LV-2003-0172 03/10/2003 $ 1,326.00 $ 1,326.00 NC0024325 City of Greensboro North Buffalo Creek WWTP Guilford LV-2003-0217 CBOD OC 04/09/2003 $ 1,326.00 $ 1,326.00 NC0024325 City of Greensboro North Buffalo Creek WWTP Guilford LV-2003-0229 CYANIDE 04/14/2003 $ 1,586.00 $ 1,586.00 NC00243251City of Greensboro North Buffalo Creek WWTP Guilford LV-2003-0477 1 CYANIDE 07/14/2003 $ 11,083.00 $ 11,083.00 NC0024325-City of Greensboro North Buffalo Creek WWTP Guilford LV-2003-0587 CBOD 20C 09/08/2003 $ 5,388.50 $ 5,388.50 NC0024325 City of Greensboro North Buffalo Creek WWTP Guilford LV-2004-0080 CYANIDE 05/12/2004 $ 601.00 $ 601.00 NC0024325-City of Greensboro North Buffalo Creek WWTP Guilford LV-2004-0102 CYANIDE 05/13/2004 $ 1,101.00 $ 1,101.00 NC0024325 City of Greensboro North Buffalo Creek WWTP ' Guilford NOV-2005-LV-0077 MERCURY $ - $ - NC0024325 City of Greensboro North Buffalo Creek WWTP Guilford NOV-2005-LV-0217 - MERCURY $ - $ - NC0024325 City of Greensboro North Buffalo Creek WWTP Guilford NOV-2005-LV-0366 MERCURY $ - $ - NC0024325 City of Greensboro North Buffalo Creek WWTP Guilford TX-2002-0002 03/20/2002 $ 1,072.00 $ 1,072.00 This facility is involved in a cyanide quantification study approved by the WQ Section. At this time no additional permiting actions recommeded. Changes of the cyanide quantification from 10 to 20 ug/1 may be future permitting action. 1,F.17:rn ; cc: PSB-NPDES Guilford County Health Dept. Central Files WSRO SOC PRIORITY PROJECT: Yes No X If Yes, SOC No. To: Permits and Engineering Unit Water Quality Section Attention: Charles Weaver Date: 30 November 2005 NPDES STAFF REPORT AND RECOMMENDATION County: Guilford Permit No. NC0024325 PART I - GENERAL INFORMATION 1. Facility and Address: City of Greensboro North Buffalo WWTP 2199 White Street Greensboro, NC 2. Date of Investigation: 28 November 2005 3. Report Prepared by: W. Corey Basinger, EE-II WSRO-SWP 4. Persons Contacted and Telephone Number: Barbara Hicks, ORC 336-373-5913 5. Directions to Site: 6. Discharge Point(s), List for all discharge points: Latitude: 36° 06' 34" Longitude: 79° 44' 53" USGS Quad No. C20SW USGS Quad Name Greensboro 7. Site size and expansion area consistent with application? X Yes No If No, explain: 8. Topography (relationship to flood plain included): Above flood plain 9. Location of nearest dwelling: >1,000 feet 10. Receiving stream or affected surface waters: North Buffalo Creek a. Classification: C NSW b. River Basin and Subbasin No.: 03-06-02 c. Describe receiving stream features and pertinent downstream uses: agricultural, residential, commercial Part II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS 1. a. Volume of Wastewater to be permitted: 16.0 MGD (Ultimate Design Capacity) b. What is the current permitted capacity of the Waste Water Treatment facility? 16.0 MGD c. Actual treatment capacity of the current facility (current design capacity)? 16.0 MGD d. Date(s) and construction activities allowed by previous Authorizations to Construct issued in the previous two years. N/A e. Please provide a description of existing or substantially constructed wastewater treatment facilities; Facility consists of influent flow measurement, two mechanical bar screens, grit removal, four primary clarifiers, two trickling filters, and two activated treatment trains. One train consists of a 4 MGD aeration tank with fine bubble diffused air and two final clarifiers. The second train consists of four activated sludge tanks with nitrification and five secondary clarifiers. The two trains combine into the tertiary sand filters, chlorination, and step post aeration. Primary and waste activated sludge is pumped to TZ Osborne WWTP for dewatering and incineration. f. Please provide a description of proposed wastewater treatment facilities. N/A g• Possible toxic impacts to surface waters: None known h. Pretreatment Program (POTWs only): in development approved X should be required not needed NPDES Permit Staff Report 2. Residuals handling and utilization/disposal scheme: a. If residuals are being land applied, please specify DWQ-AP Permit No. Residuals Contractor Telephone No. b. Residuals stabilization: PSRP PFRP Other c. Landfill: d. Other disposal/utilization scheme (Specify): Incineration 3. Treatment plant classification (attach completed rating sheet) . 4. SIC Code(s) : 4952 Primary 01 Secondary 02 Main Treatment Unit Code: 0 4 1 x 6 PART III - OTHER PERTINENT INFORMATION 1. Is this facility being constructed with Construction Grant Funds or are any public monies involved. Yes 2. Special monitoring or limitations (including toxicity) requests: None at this time. 3. Important SOC, JOC or Compliance Schedule dates: (Please indicate) N/A Date Submission of Plans and Specifications Begin Construction Complete Construction NPDES Permit Staff Report PART IV - EVALUATION AND RECOMMENDATIONS WSRO recommends reissuance of NPDES Permit NC0024325 in accordance with Division guidelines. ,Joil zdrds— Environmen•.l Engine Date Water Quality Regional Supervisor Date Certified Mail Return Receipt 7002 3150 0003 9710 7049 December 30, 2005 Mr. Charles H. Weaver, Jr. NC DENR / DWQ / Point Source Branch 1617 Mail Service Center Raleigh, NC 27699-1617 RE: City of Greensboro North Buffalo POTW NPDES Permit NC0024325 Renewal Application Dear Mr. Weaver, The City of Greensboro hereby requests renewal of NPDES Permit Number NC0024325 issued to the North Buffalo Water Reclamation Facility. Enclosed please find three copies [1 original and 2 copies] of the required documents for NPDES permit renewal. If you require any addition information or have any questions, please do not hesitate to contact me at 336-373-2055 or by email at allan.williams@ci.greensboro.nc.us. Sincerely, Allan Willi Director of Water Resources Enclosures: EPA Form 3510-2A [1 original and 2 copies] with attachments cc: Don Howard, Water Reclamation Manager Barbara Hicks, North Buffalo ORC Martie Groome, Laboratory and Industrial Waste Section Supervisor`" •' American Canoe Association, c/o Terris, Pravlik and Millian 640 P.O. Box 3136 • Greensboro, NC 27402-3136 • www.ci.greensboro.nc.us • (336) 373-2065. • TTY#333-6930. PART B.2. CITY OF GREENSBORO NORTH BUFFALO POTW NC0024325 Brame•Rd'"" Fcrnhroul:•Ra'... eyood.� 1 Dunn i /cam y . ' `�e��, 1� 1 am':`,'° O ' ~.A `c Bonaire , a f i.r o ., �Lar�yQJs ` ; s. .Vt. :005 :Te`IuA'`las?1`N°Od C : , Jr ' ' ' Irtiacl. ' 2005 DipitalGlobe. " 1 _ - i d 'I Alonzwet PART B.3. CITY OF GREENSBORO NORTH BUFFALO POTW NC0024325 Narrative Description of Treatment Processes and Sludge Disposal NORTH BUFFALO Treatment Processes Primary Treatment • Influent Flow Measurement [parshall flume] • Bar Screen [1/4 inch fine screens] • Aerated Grit Removal • Primary Clarifiers • Primary effluent flow transfer station to T.Z. Osborne POTW ** Secondary Treatment [2 separate trains] • Secondary Train #1 — High Rate Trickling Filters — Single Stage Activated Sludge [with Nitrification and step feed capabilities] — Final Clarifiers • Secondary Train #2 — Single Stage Activated Sludge [with Nitrification] — Final Clarifiers Tertiary [Advanced] Treatment: • Chemical Phosphorus Removal [using sodium aluminate] • Tertiary Sand Filters • Effluent Flow Measurement [parshall flume] Disinfection by Chlorination [Sodium Hypochlorite] Re -Aeration [aerated chlorine contact chamber] **Wastewater Transfer Station to Osborne Facility capable of transferring 8.0 MGD [Average Flow Transferred = 4 MGD] Sludge Disposal Primary Sludge and Waste Activated Sludge from the North Buffalo POTW are transferred to the T.Z. Osborne POTW via pipeline where it is mixed with T. Z. Osborne sludge, gravity thickened, further dewatered by centrifuges and then incinerated [fluidized bed incinerator]. The incinerator ash is disposed of at a dedicated site in City of Greensboro landfill. Treatment Plant Schematic Flow Diagram SRO' C.411,(0,7 re• 7.11S4: Olt rwirr--. IC*EVIM (7\-k• ! <-‘ .77 ' 2 \ LEGEND =93 - . • = 444, 6.to: tar.; w 4,, 7.. or ••...• •f• .4444 Z.,• rr How the Plant Functions • C% EF.-....:Es• ...VV.,: r— . r...—.._ 3 2 : , , . ..........,..! ,, .. ,_, ! ! 1 1 i . ( S7,.• 777 I 7, • 1151=1:12d e Part F - City of Greensboro North Buffalo, NC0024325 Pipe 001 F.3. Significant Industrial User information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages as necessary. Name: Greensboro Industrial Platers 01 Mailing Address: 725 Kenliworth Street Greensboro. NC 27403 F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge. Metal Finishing — cleaning, rinse. nickel plating, electroless nickel F.5. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's discharge. Principal product(s): Raw materiai(s): Service Industry — Job Shop Electroplater alkaline cleaner. degreaser, nickel. hydrochloric acid, nitric acid F.6. Flow Rate. a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per day (gpd) and whether the discharge is continuous or intermittent. 3,300 gpd (X continuous or intermittent) b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system in gallons per day (gpd) and whether the discharge is continuous or intermittent. gpd continuous or intermittent) F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following: a. Local limits b. Categorical pretreatment standards ® Yes ❑ No ® Yes ❑ No If subject to categorical pretreatment standards, which category and subcategory? Electroplating — Job Shop Discharging Less Than 10,000 GPD 140 CFR 413.14 and 413.741 F.8. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g., upsets, interference) at the treatment works in the past three years? ® Yes ❑ No, If yes, describe each episode. Greensboro Industrial Platers 01 had an unauthorized discharge of a chrome plating solution that adversely impacted the City of Greensboro North Buffalo Water Reclamation Facility and caused the total chromium concentration in the North Buffalo Facility effluent to exceed the proposed weekly average total chromium NPDES permit limit concentration of 51 uall on 9/17/03, 9/18/03 and 9/19/03. The North Buffalo influent concentrations over this period were an order of magnitude higher than historical values Additional Information — Part F Page 1 of 7 •i r• Part F - City of Greensboro North Buffalo, NC0024325 Pipe 001 • F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages as necessary. Name: Triad Anodizing and Plating Company. Inc. Mailing Address: 3502 Spring Garden Street Greensboro, NC 27407 F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge. Metal Finishing (zinc plating, anodize bath. chromate bath, dichromate bath, various dves and chemical films) F.5. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's discharge. Principal product(s): Job Shop Electroplater Raw material(s): Caustic. sulfuric acid. chromate, deoxidizer, sealant, dves, dichromate alkaline cleaner F.6. Flow Rate. a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per day (gpd) and whether the discharge is continuous or intermittent. 6300 gpd (X continuous or intermittent) b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system in gallons per day (gpd) and whether the discharge is continuous or intermittent. gpd continuous or intermittent) F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following: a. Local limits b. Categorical pretreatment standards ® Yes ® Yes ❑ No 0 No If subject to categorical pretreatment standards, which category and subcategory? Electroplating — Job Shop Discharging Less Than 10.000 GPD 140 CFR Part 413.14 and 40 CFR 413.441 F.8. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g., upsets, interference) at the treatment works in the past three years? 0 Yes ® No If yes, describe each episode. Additional Information — Part F Page 2 of 7 •k Part F - City of Greensboro North Buffalo, NC0024325 Pipe 001 F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages as necessary. Name: Guilford Plating Company Mailing Address: 3318 Church Street Ext. Greensboro, NC 27405 F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge. Metal Finishing (copper bath, zinc bath. nickel bath. chrome bath. cleaning. parts rinse) F.5. Principal Product(s) and Raw Materlal(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's discharge. Principal product(s): Raw material(s): chrome Job Shop Electroplater copper. zinc. nickel sulfate, boric acid. brighteners. purifier. sulfuric add. alkaline deaner and F.6. Flow Rate. a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per day (gpd) and whether the discharge is continuous or intermittent. 1,700 gpd ( continuous or X intermittent) b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system in gallons per day (gpd) and whether the discharge Is continuous or intermittent. gpd ( , continuous or intermittent) F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following: a. Local limits b. Categorical pretreatment standards ® Yes Yes ❑ No ❑ No If subject to categorical pretreatment standards, which category and subcategory? Electroplating —Job Shop Discharging Less Than 10,000 GPD f40 CFR Part 413.141 F.8. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g., upsets, interference) at the treatment works in the past three years? 0 Yes ® No If yes, describe each episode. Addition! Information - Part F Page 3 of 7 -4. Part F - City of Greensboro North Buffalo, NC0024325 Pipe 001 F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages as necessary. Name: Harvin Reaction Technology Mailing Address: 3921 Spring Garden Street Greensboro, NC 27407 F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge. Reactor Washes from propoxvlation of material, esterification and/or blending. F.S. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's discharge. Principal product(s): Polvether. polyester polvols, fire retardant polvols, fatty acid esters. pigment dispersions and blended urethane systems and binders Raw material(s): polvols. diethanolamine, blenders, receivers, diethylene glycol , sugar, glycerin, triethanolamine, tetrabromophthalic anhydride. diethvlene and propylene glycol. amine catalysts, bromlnated fire retardants, blowing agent. organotitanates, potassium hydroxide propylene oxide, caustic. flaked solid alcohols, dry organic pigments, wetting agents. trischloroethvl phosphate, trischloropropvl phosphate. surfactants. Harvin's list of raw materials may vary depending on customer orders. Extensive raw material list is on file at POTW. F.6. Flow Rate. a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per day (gpd) and whether the discharge is continuous or intermittent. 13,000 gpd ( continuous or X intermittent) b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system in gallons per day (gpd) and whether the discharge is continuous or intermittent. gpd ( continuous or intermittent) F.7. Pretreatment Standards. indicate whether the SIU is subject to the following: a. Local limits b. Categorical pretreatment standards ® Yes ® Yes ❑ No ❑ No If subject to categorical pretreatment standards, which category and subcategory? Organic Chemicals. Plastics and Synthetic Fibers 140 CFR Part 414.1101 F.B. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g., upsets, interference) at the treatment works In the past three years? ❑ Yes ® Nq If yes, describe each episode. Additional Information — Part F Page 4 of 7 .1. Part F - City of Greensboro North Buffalo, NC0024325 Pipe 001 F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages as necessary. Name: Hilemn. LLC Mailing Address: 3125 Spring Garden Street Greensboro. NC 27407 F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge. Silver Reclaim Process, Mixing. Rinses F.5. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's discharge. Principal product(s): Silvering Solutions used for the mirror manufacturing industry Raw material(s): silver nitrate. ammonium hydroxide. sodium hydroxide. sulfuric acid. ferrous sulfate, magnesium hydroxide, copper sulfate, acetic acid. copper chloride, salt, chelating agent and flocculent F.6. Flow Rate. a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per day (gpd) and whether the discharge is continuous or intermittent. 600 gpd ( continuous or X intermittent) b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system in gallons per day (gpd) and whether the discharge is continuous or intermittent. gpd continuous or intermittent) F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following: a. Local limits b. Categorical pretreatment standards ® Yes ❑ No ® Yes ❑ No If subject to categorical pretreatment standards, which category and subcategory? Inorganic Chemicals Manufacturing 140 CFR Part 415.5341 F.8. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g., upsets, interference) at the treatment works in the past three years? 0 Yes ® No If yes, describe each episode. Additional Information — Part F Page 5 of 7 Part F - City of Greensboro North Buffalo, NC0024325 Pipe 001 F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages as necessary. Name: Lorillard Tobacco Co. Mailing Address: 2525 East Market Street Greensboro, NC 27401 F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge. Casing, Menthol Prep. Cigarette Manufacturing. Drying, Mix kitchen F.5. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's discharge. Principal product(s): Cigarettes Raw material(s): Tobacco, flavorings, menthol. paste F.6. Flow Rate. a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per day (gpd) and whether the discharge is continuous or intermittent. 174,000 gpd (X continuous or intermittent) b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system in gallons per day (gpd) and whether the discharge is continuous or intermittent. gpd continuous or intermittent) F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following: a. Local limits b. Categorical pretreatment standards ® Yes ❑ Yes ❑ No ® No If subject to categorical pretreatment standards, which category and subcategory? F.8. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.. upsets, interference) at the treatment works in the past three years? 0 Yes 0 Nq If yes, describe each episode. Additional Information — Part F Page 6 of 7 czC Part F - City of Greensboro North Buffalo, NC0024325 Pipe 001 F.3. Significant industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages as necessary. Name: Pugh Metal Finishing Mailing Address: 802 West Lee Street Greensboro, NC 27403 F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge. Zinc plating. cadmium plating, nickel plating, black oxide bath and rinses F.5. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's discharge. Principal product(s): Job Shop Electroplater Raw material(s): Alkaline cleaner, chromic acid, zinc, nickel, copper, cyanide sodium. sodium hydroxide, muriatic acid. brightener, black oxide F.6. Flow Rate. c. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per day (gpd) and whether the discharge is continuous or intermittent. 4.900 gpd ( continuous or intermittent) d. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system in gallons per day (gpd) and whether the discharge is continuous or intermittent. gpd ( continuous or intermittent) F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following: a. Local limits ® Yes 0 No b. Categorical pretreatment standards ® Yes 0 No If subject to categorical pretreatment standards, which category and subcategory? Electroplating — Job Shop Discharging Less Than 10.000 GPD 140 CFR Part 413.141 F.8. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g., upsets, interference) at the treatment works in the past three years? 0 Yes ® No If yes, describe each episode. Additional Information — Part F Page 7 of 7