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HomeMy WebLinkAboutNC0026000_Permit (Issuance)_20100212NPDES DOCUMENT !;CANNIN. COVER SHEET NPDES Permit: NC0026000 Tabor City WWTP Document Type: `permit Issuance Wasteload Allocation Authorization to Construct (AtC) Permit Modification Complete File - Historical Engineering Alternatives (EAA) Correspondence Owner Name Change Instream Assessment (67b) Speculative Limits Environmental Assessment (EA) Document Date: February 12, 2010 This document is printed on reuse paper - ignore any content ou. the re'rerse side kiria NCDENR North Carolina Department of Environment and Natural Resources Division of Water Quality Beverly Eaves Perdue Coleen H. Sullins Governor Director Dee Freeman Secretary February 12, 2010 the Honorable Royce Harper, Mayor The Town of Tabor City P.O. Box 655 Tabor City, North Carolina 28463 Subject: Issuance of NPDES Permit NC0026000 Tabor City WWTP, Grade III Off Hwy 701 Bypass Columbus County Your Honor: The Division of Water Quality (the Division) hereby issues the attached NPDES permit for the subject facility. This permit is issued pursuant to the requirements of North Carolina General Statute 143-215.1 and the Memorandum pf Agreement between North Carolina and the U.S. Environmental Protection Agency dated October 15, 2007, or as subsequently amended. Increased Monitoring for Fecal Coliform.— I response to your comments on the draft permit (received January 19, 2010), the Division concurs with your proposal to sample fecal conform on Monday through Thursday (4 samples per week), with an additional fifth sample to be collected on Fridays during any "abnormal rainfall" condition. We applaud your willingness to sample all five (5) samples, as required, during peak -flow hours (between 09:00 and 14:00). Please note that the Division defines high -flow conditions on Fridays as "any influent flow exceeding permitted 1.1 MGD." Therefore, we have adjusted your permit accordingly and revised the effluent -page footnote. After one year you may request the Division to review monitoring and make adjustments, as warranted [see permit Section A. (1.)]. Permit Special Conditions A. (3.) — As observed during DWQ's onsite inspections, the influent pumping station (a 3-pump system) cycles "on and off' automatically, adding pumps in response to progressively higher flows. However, more than one pump overwhelms the WWTP headworks causing raw sewerage overflow and spills to the receiving -stream environment. High influent flow may be diverted to the new EQ basin only if an operator is present to manually divert the flow. Your Operator in Responsible Charge (ORC) confirmed that the Pump Station is beyond her job responsibilities. DWQ will require your further review of this influent pump station with a holistic regard to the WWTP from headworks to outfall. We therefore have retained permit Special Conditions A. (3.) requiring your findings and recommendations to solve overflow issues at the plant headworks. Please note that you are not required to implement, but provide findings and recommendations for modifications and/or operational adjustments within 90 days of the permit effective date. Your report may include, but is not limited to, an Engineering Analysis of pipe -sizing, concrete fixtures, grit chamber, and bar screen, specifically addressing the impact of peak flows routed via the influent pumping station. Permit Special Condition A. (4.) — Also, please be reminded that you must address immediately the maintenance issues at your tertiary deep -sand filter system, likewise complying with this Special Conditions within 90 days of the permit effective date. 1617 Mail Service Center, Raleigh, North Carolina 27699-1617 Location: 512 N. Salisbury St. Raleigh, No th Carolina 27604 Phone: 919-807-63001 FAX: 919-807-64921 Customer Service:1-877-623-6748 Internet: www.ncwaterquality.org An Equal Opportunity t Affirmative Action Employer No�rthCazolina JV'aturallij UV Disinfection - Total Residual Chlorine (TRC) — The Division notes that your installation and repairs \ to the Ultraviolet (UV) disinfection system have been only moderately successful in complying with the fecal coliform permit limit, and you have resorted to alternate disinfection using a backup gaseous chlorine. You may wish to reevaluate this inadequate UV operation. The Division has therefore retained the TRC limit, anticipating continued use, and added a footnote to the effluent monitoring table, Section A. (1.). However, because of difficulties quantifying TRC in a wastewater matrix, TRC values reported below 50 ug/L will be considered compliant with this permit, per statewide policy governing chlorine. Collection System Evaluation and Remediation Plan — Within 30 months of the permit effective date, Tabor City shall design, fund, and implement a Sewer Collection System Evaluation and Remediation Plan. This Plan shall present methods to evaluate stormwater inflow and infiltration (UI), present findings, and implement studies and remediation schedules, as needed. Tabor City must report to the Division on conditions and progress by means of a Quarterly Progress Report to be submitted no later than the end of each calendar quarter, beginning with the period following the permit effective date. Failure to meet this Special Condition will constitute a violation of this permit and will subject you to civil penalty assessment. Finally, please be advised that you must report any sanitary sewer spill or overflow to the Wilmington Regional Office. Failure to report a wastewater loss to the environment constitutes a violation of your NPDES permit, and any unreported spill will subject you to civil penalty assessment. If any parts, measurement frequencies, or sampling requirements contained in this permit are unacceptable, you have the right to an adjudicatory hearing, upon written request submitted within thirty (30) days after receiving this letter. Your request must take the form of a written petition conforming to Chapter 150B of the North Carolina General Statutes, and you must file it with the office of Administrative Hearings, 6714 Mail Service Center, Raleigh, North Carolina 27699-6714. Unless such a demand is made, this permit shall be final and binding. This permit is not transferable except after notifying the Division of Water Quality. The Division may require modification, or revocation and re -issuance of this permit. Please note that this permit does not affect your legal obligation to obtain other permits required by the Division of Water Quality, the Division of Land Resources, the Coastal Area Management Act, or other federal or local governments. If you have questions, or if we can be of further service, please contact Joe Corporon at [ioe.corporont7a,ncdenr.gov] or call (919) 807-6394. Enclosure: NPDES Permit NC0026000 Respectfully, jCo1een H. Sullins cc: WiRO / Surface Water Protection Section, Attn: Linda Willis [permit, Fact Sheet Addendum] EPA Region 4, Attn: Marshall Hyatt [permit, Fact Sheet Addendum] NPDES Program Files [permit and Fact Sheet Addendum] Technical Assistance and Certification Unit, Attn. Steve Reid [email permit and Fact Sheet Addendum] Aquatic Toxicology Unit, Attn: Susie Meadows [email permit and Fact Sheet Addendum] Hobbs -Upchurch and Associates, P.A., Southem Pines, NC (info@hobbsupchurch.com) [Email permit and Fact Sheet Addendum] 1617 Mail Service Center, Raleigh, North Carolina 27699-1617 Location: 512 N. Salisbury St. Raleigh, North Carolina 27604 Phone: 919-807-6300 1FAX: 919-807.64921 Customer Service: 1-877-623-6748 Internet: www.ncwaterquality.org An Equal opportunity \ Affirmative Action Employer NorthCarolina Naturally • Permit NC0026000 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY PERMIT TO DISCHARGE WASTEWATER UNDER THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) In compliance with the provisions of North Carolina General Statute 143-215.1, other lawful standards and regulations promulgated and adopted by the North Carolina Environmental Management Commission, and the Federal Water Pollution Control Act, as amended, Town of Tabor City is hereby authorized to discharge wastewater from an outfall located at the Tabor City Wastewater Treatment Plant Off Hwy 701 Bypass, east of Tabor City Columbus County to receiving waters designated as an unnamed tributary of Grissett Swamp located within the Lumber 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 March 1, 2010. This permit and authorization to discharge shall expire at midnight on August 31, 2014. Signed this day February 12, 2010. fd ( C61een H. Sullins, Director Division of Water Quality By Authority of the Environmental Management Commission Permit NC0026000 SUPPLEMENT TO PERMIT COVER SHEET All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby revoked, and as of this issuance, any previously issued permit bearing this number is no longer effective. Therefore; the exclusive authority to operate and discharge from this facility arises under the permit conditions, requirements, terms, and provisions described herein. Town of Tabor City is hereby authorized: 1. to continue operating a 1.1 MGD activated -sludge wastewater treatment facility consisting of: • an influent.pumping station • Parshall flume • mechanical bar screen and mechanical grit remover • equalization basin (1.7 MGD) • dual -train, activated sludge, extended -aeration basins with mechanical surface aerators • two (2) clarifiers (may be operated in parallel or in series) • deep -sand tertiary filtration system • aerated sludge -holding basin • sludge digester • effluent sampler • UV disinfection within chlorine -contact basin (backup: gas chlorine / sulfur -dioxide dechlor) • ultrasonic flow meter, and • a back-up power generator located at the Town of Tabor City Wastewater Treatment Plant, off Hwy 701 bypass, east of Tabor City, Columbus County, and 2 to discharge from said treatment facility through Outfall 001 at a specified location (see attached map) into an unnamed tributary of Grissett Swamp, a waterbody classified as C Swamp within the Lumber River Basin. Upstream Monitoring Point at US HWY-701 Tabor City's WWTP (Approximate Location) Town of Tabor City WWTP Receivina Strea m: Latitude: Sub -Basin: Stale Grid / USGS Ouad: Stream Class: UT of Grissett Swamp Drainage Basin: Lumber River 34° 08' 56" N Lonaitude: 78° 51' 26" W 03-07-57 Permitted Flow: 1.1 MGP K 23 NE / Tabor City East, N.C. C-Swamp Outfall 001 Facility Location (not � Facility Location (not to scale) 9 North NPDES Permit NC0026000 Columbus County Permit NC0026000 A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge through Outfa11 001. Such discharges shall be limited and monitored by the Permittee as specified below: PARAMETER EFFLUENT LIMITS MONITORING REQUIREMENTS Monthly Average Weekly , Average Daily Maximum Measurement Frequency Sample Type Sample Locationl Flow P.1 MGD Continuous Recording I or E BOD, 5 day, 20°C (Apr 1 — Oct 31) 2 5.0 mg/L 7.5 mg/L 3/Week Composite I, E BOD, 5 day, 20°C (Nov. 1 — Mar 31) 2 10.0 mg/L 15.0 mg/L 3/Week Composite I, E Total Suspended Solids (TSS) 2 .30.0 mg/L 45.0 mg/L 3/Week Composite I, E NH3 as N (April 1— October 31) 2.0 mg/L 6.0 mg/L 3/Week Composite E NH3 as N (Nov. 1— March 31) 4.0 mg/L 12.0 mg/L 3/Week Composite E Fecal Coliform (geometric mean) 3 200 / 100 ml 400 / 100 ml 1/Day 3 Grab E Temperature (°C) 1/Day Grab E Total Residual Chlorine (TRC) 4 17 mg/L 3/Week Grab E Dissolved Oxygen Daily average > 5.0 mg/L 3/Week Grab E pH > 6.0 and < 9.0 standard units 3/Week Grab E Total Mercury 5 12 ng/L 5 1/Week Grab _ E Total Phosphorus 1/Month Composite E Total Nitrogen (NO2-N + NO3-N + TKN) 1/Month Composite E Total Copper 1/Month Composite E Total Zinc 1/Month Composite E Chronic Toxicity 7 1/Quarter Composite E Priority Pollutant Analyses (PPA) 8 1/Year Grab E • Temperature, °C Variable9 Grab U, D Dissolved Oxygen Variable9 Grab U, D Footnotes: 1. U: approximately 100 feet Upstream of the outfall at U.S. Hwy 701 Bypass. D: approximately 75 yards downstream from the outfall. 2. The monthly average effluent BODS and Total Suspended Solids concentrations shall not exceed 15 % of the respective influent values (i.e., 85% removal is required). 3. Fecal Coliform — the Permittee shall collect four (4) daily samples (Monday —Thursday). Should flow exceed 1.1 MGD on Friday, the Permittee shall also sample on Friday — all fecal coliform to be sampled between 09:00 and 14:00 hrs. After 1 year from effective date, the Permittee may request a data review, and the Division may adjust, as warranted. 4. Total Residual Chlorine (TRC) - monitor only if chlorine is used to disinfect. Because of difficulties quantifying TRC in a wastewater matrix, the Division will consider all TRC values reported below 50 AWL to be compliant. 5. Mercury — Permittee shall report mercury using sample -collection criteria and test methods established by EPA Test Method 1631E (see A. (3)). 6. Chronic Toxicity (Ceriodaphnia at 90 %); 1/Quarter (March, June, Sept, and Dec) [see A. (2)]. 7. Permittee must scan annually for Priority Pollutants [see A. (7)]. 8. Variable: the Permittee shall conduct receiving -stream monitoring 3/week during the summer months of June, July, August, and September and 1/Week during the rest of the year. Units: BOD = biochemical oxygen demand NH3 as N = ammonia as nitrogen ml = milliliter mg/L = milligrams per liter pg/L = micrograms per liter ng/L = nanograms per liter • The Permittee shall discharge no floating solids or foam visible in other than trace amounts. Permit NC0026000 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, March, June, September, and December. Effluent sampling for this testing shall be performed at the NPDES permitted final effluent discharge below all treatment processes. If the test procedure, performed as the first test of any single quarter, results in a failure or ChV below the permit limit, then multiple -concentration testing shall be performed at a minimum, in each of the two following months, as described in "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions. The chronic value for multiple concentration tests will be determined using the geometric mean of the highest concentration having no detectable impairment of reproduction or survival and the lowest concentration that does have a detectable impairment of reproduction or survival. The definition of "detectable impairment," collection methods, exposure regimes, and further statistical methods are specified in the "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions. All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge Monitoring Form (MR-1) for the months in which tests were performed, using the parameter code TGP3B for the pass/fail results and THP3B for the Chronic Value. Additionally, DWQ Form AT-3 (original) is to be sent to the following address: Attention: NC DENR / DWQ / Environmental Sciences Section 1621 Mail Service Center Raleigh, North Carolina 27699-1621 Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Section no later than 30 days after the end of the reporting period for which the report is made. Test data shall be complete, accurate, include all supporting chemical/physical measurements and all concentration/response data, and be certified by laboratory supervisor and ORC or approved designate signature. Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for disinfection of the waste stream. Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required, the Permittee will complete the information located at the top of the aquatic toxicity (AT) test form indicating the facility name, permit number, pipe number, county, and the month/year of the report with the notation of "No Flow" in the comment area of the form. The report shall be submitted to the Environmental Sciences Section at the address cited above. Should the Permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will be required during the following month. Should any test data from this monitoring requirement or tests performed by the Division indicate potential impacts to the receiving stream, this permit may be re -opened and modified to include alternate monitoring requirements or limits. If the Permittee monitors any pollutant more frequently than required by this permit, the results of such monitoring shall be included in the calculation & reporting of the data submitted on the DMR & all AT Forms submitted. NOTE: Failure to achieve test conditions as specified in the cited document (such as minimum control organism survival, minimum control organism reproduction, and/or 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 initial monitoring. Permit NC0026000 A. (3) MERCURY REOPENER. The Division may re -open this permit to require mercury Ioad limitations, mercury minimization plans, and/or source water characterization following completion of the Phase II Mercury TMDL for the Lumber and Waccamaw River watersheds. A. (4) HEADWORKS /PUMP STATION EVALUATION — SPECIAL CONDITION Data suggest that peak flows overwhelm the WWTP headworks. Therefore, within 90 days of the permit effective date, the Permittee shall provide an Engineering Analysis of the WWTP headworks design (pipe -sizing, concrete fixtures, grit chamber, and bar screen) and operation specifically addressing the impact of peak flows routed via the influent pumping station. This report shall include findings and recommendations for additions and/or operational adjustments. A. (5) TERTIARY SAND FILTERS — SPECIAL CONDITION Considering that the Permittee received an Authorization to Construct permit and a Clean Water Management Trust Fund grant (CWMTF 1997A-117) for a tertiary deep -filter system, the Permittee shall, within 90 days of the permit effective date, bring these existing tertiary filters online for daily operation. Failure to meet this Special Condition will constitute a violation of this permit for "failure to properly maintain and operate" a permitted facility, and will subject the Permittee to civil penalty assessment. A. (6) INFLOW AND INFILTRATION STUDY — SPECIAL CONDITION Within 30 months of the permit effective date, the Permittee shall design, fund, and implement a Sewer Collection System Evaluation and Remediation Plan. This Plan shall present methods to evaluate stormwater inflow and infiltration (UI), present findings, and implement studies and remediation schedules, as needed. The Pennittee shall report to the Division on conditions and progress by means of a Quarterly Progress Report to be submitted no later than the end of each calendar quarter, beginning with the period following the permit effective date. Failure to meet this Special Condition will constitute a violation of this permit and will subject the Permittee to civil penalty assessment. Permit NC0026000 A. (7) ANNUAL PRIORITY POLLUNT ANALYSES The Permittee shall perform effluent Priority Pollutant (PPA) scans in accordance with 40 CFR Part 136 for all parameters listed in the attached table. The Permittee shall sample approximately annually except to provide seasonal variation. Unless otherwise indicated, metals shall be analyzed as "total recoverable." Ammonia (as N) Trans-1,2-dichloroethylene Bis (2-chloroethyl) ether Chlorine, total residual (TRC) 1 ,1 -dichloroethylene Bis (2-chloroisopropyl) ether Dissolved oxygen 1,2-dichloropropane Bis (2-ethylhexyl) phthalate Nitrate/Nitrite 1;3-dichloropropylene ' 4-bromophenyl phenyl ether • Kjeldahl nitrogen Ethylbenzene Butyl benzyl phthalate Oil and grease Methyl bromide 2-chloronaphthalene Phosphorus Methyl chloride 4-chlorophenyl phenyl ether Total dissolved solids Methylene chloride Chrysene Hardness 1,1,2,2-tetrachloroethane Di-n-butyl phthalate Antimony Tetrachloroethylene Di-n-octyl phthalate Arsenic Toluene Dibenzo(a,h)anthracene Beryllium 1,1,1-tichloroethane 1,2-dichlorobenzene Cadmium 1,1,2-tichloroethane 1,3-dichlorobenzene Chromium Trichloroethylene 1,4-dichlorobenzene Copper Vinyl chloride • 3,3-dichlorobenzidine Lead "Acid -extractable Compounds Diethyl phthalate Mercury P-chloro-m-creso Dimethyl phthalate Nickel 2-chlorophenol 2,4-dinitrotoluene Selenium 2,4-dichlorophenol 2,6-dinitrotoluene Silver 2,4-dimethylphenol 1,2-diphenylhydrazine Thallium 4,6-dinitro-o-cresol Fluoranthene Zinc 2,4-dinitrophenol Fluorene Cyanide 2-nitrophenol Hexachlorobenzene Total phenolic compounds 4-nitrophenol Hexachlorobutadiene Volatile Organic Compounds Pentachlorophenol Hexachlorocyclo-pentadiene Acrolein Phenol Hexachloroethane Acrylonitrile 2,4,6-trichlorophenol Indeno(1,2,3-cd)pyrene Benzene Base -neutral Compounds Isophorone Bromoform Acenaphthene Naphthalene Carbon tetrachloride Acenaphthylene Nitrobenzene Chlorobenzene Anthracene N-nitrosodi-n-propylamine Chlorodibromomethane Benzidine N-nitrosodimethylamine Chloroethane Benzo(a)anthracene N-nitrosodiphenylamine 2-chloroethylvinyl ether Benzo(a)pyrene Phenanthrene Chloroform 3,4 benzofluoranthene Pyrene Dichlorobromomethane Benzo(ghi)perylene 1,2,4-tichlorobenzene 1,1-dichloroethane Benzo(k)fluoranthene 1,2-dichloroethane Bis (2-chloroethoxy) methane The Permittee shall report test results within 90 days of sample collection to the Division in DWQ Form- DMR-PPA1 or in a. form approved by the Director. This report shall be submitted to: - NCDENR/ DWQ, Surface Water Protection Section Central Files 1617 Mail Service Center Raleigh, North Carolina 27699-1617 DENR / DWQ / NPDES Unit F CT SHEET ADDENDUM PDES PERMIT DEVELOPMENT NPDES Permit NC0026000 05Feb2010 Joe R. Corpo • 11 NPDES East DWQ C- tr• Office received comments on the Draft Permit from the Permittee on 19Jun2010 and, a i er . scussion with Linda Willis and Kipp Glazier of the Wilmington Regional Office (W . O) offers the following summations for this renewal: Fecal Coliform Sampling — The Permittee requests to sample four (4) times a week — not five (5), as proposed in the draft permit, because a Friday sample requires them to pay for Lab results on Saturday, an additional expense. They propose to sample Monday through Thursday providing four (4) samples per week, and collect a fifth sample only during storm -flow conditions on Friday. DWQ agrees that this proposal is adequate for this Grade III facility, but has defined "storm -flow conditions" as any Friday when the influent wastewater flow rate exceeds the permitted 1.1 MGD. Moreover, the Permittee has volunteered to collect all fecal coliform samples during peak flow between 09:00 and 14:00 hrs. The permit final will so stipulate. • Minor Corrections to the Draft Permit — The Permittee notes that the Supplement to Cover Sheet incorrectly lists two clarifiers operated in series noting that they are often used in parallel. However, because plumbing provides the option to use either way, DWQ has modified the permit final to read "(may be operated in parallel or in series)." Also, the draft incorrectly described the chlorine disinfection system as "liquid" chlorination - this has been corrected to read "gaseous" chlorine. • Special Condition A. (3.) - Additional Evaluation of the WWTP Headworks — The Permittee has questioned the need for additional evaluation of the WWTP headworks. They argue that they paid a consultant recently to evaluate the WWTP and build the upstream pumping station and DWQ approved this design. After additional review, the WaRO notes that the Authorization to Construct permit for the pumping station did not include a holistic evaluation of its affects on the existing WWTP. As observed during DWQ's onsite inspections, the pumping station (a 3-pump system) cycles on automatically, adding pumps in response to progressively higher flow conditions. However, more than one pump overwhelms the WWTP headworks causing raw sewerage to overflow and spill to the receiving -stream environment. High influent flow may only be diverted to the new EQ basin if an operator is present to manually divert the flow. Therefore, the Division feels strongly that this system needs a holistic reevaluation from headworks to outfall and will continue to require permit Special Condition A. (3.) — no changes to the permit final. This issue will be addressed in the Permit Final cover letter. Fact Sheet Addendum — Tabor City 2010 Renewal NPDES Permit N00026000 Page I DIANE B. WARD CLERK-TREAS. KEVIN BULLARD TOWN ATTORNEY A.J. LEONARD, JR. TOWN MANAGER _.:_lm-ABOR CITY CHARTERED FEB.2, 1905 CHARTERED FEB.2, 1905 "HOME OF THE NORTI-I CAROLINA YAM FESTIVAL" TOWN OF TABOR CITY P.O. DRAWER 655 TABOR CITY, NC 28463 Office 910-653-3458 Facsimile 910-653-3970 January 14, 2010 Mr. Joe R. Corporon, L. G. Division of Water Quality 1617 Mail Service Center Raleigh NC 27699-1617 Dear Mr. Corporon: ROYCE HARPER, MAYOR MIONA FONVIELLE MAYOR PRO TEM DAVID E. MINCEY MITCHELL WARD TRENT BURROUGHS Thank you for your letter dated December 16`h in which you discussed the NPDES permit proposed for the Tabor City Wastewater Treatment Plant. In that letter you gave Tabor City the chance to provide comment and/or corrections to the draft. Thank you for that opportunity, and please consider this letter as our comments to the materials we have received. One of the most important issues that we would like to bring to your attention is the proposed issue concerning Fecal Coliform testing. The Town of Tabor City understands from your draft that you wish to have our Fecal Coliform test samples increased to five (5) times per week. This would be not feasible for us. This would require the laboratory to do their analysis on the weekends for the Friday sample. Our Lab is not opened on weekends. Instead, the Town of Tabor requests four (4) per week Fecal Coliform testing. These four (4) samples would be collected during peak wastewater influent flow (between 9:00 A. M. and 2:00 P. M.) Attached is our SOP for NPDES permit sampling. It was revised on December 1, 2009. It addresses special Fecal Coliform sampling for abnormal rainfall and pending storm flow conditions. We look forward to your revision of our new permit away from five (5) times per week sampling for Fecal Coliform. The other comments that we make to the materials sent to us are less severe. For example, on the first page of the cover letter dated December 16th, it states that the Town of Tabor City has a backup liquid chlorine system. This is incorrect. The Town of Tabor City has always used gaseous chlorine. In the "Supplement To Permit Cover Letter" it states that two (2) clarifiers, operated in series. This should read "operate in parallel". The cover letter also stated that the town is being required to analyze "unsolved overflow issues at the plant head works." We question why this data is needed at this time. Recently the town implemented a complete renovation of the Wastewater Treatment Plant and the plans and specifications for these improvements were approved by the engineering staff of the State of North Carolina. We are merely operating pumps and head works improvements that have already been analyzed by your engineers. We trust that these comments are helpful and will be an improvement to the permit that is about to be issued to our Wastewater Treatment Plant. Should you have any questions, please feel free to contact me at your earliest convenience. Respectfully, 1 J. Leona d, Jr., Town Manager DENR-WATER QU POINT SOURCE BRANCH Town of Tabor City WWTP WWTP NPDES PERMIT SAMPLING REQUIREMENTS AREA: Wastewater Treatment Plant EFFECTIVE: 8/16/05 sm APPROVED BY: Stephanie Moore REVIEWED: 12/1/09 sm REVISED: 12/1/09 sm WASTEWATER SAMPLING REQUIREMENTS(DAILY, WEEKLY, MONTHLY & QUARTERLY) NPDES PERMIT REQUIREMENTS Tabor City - NC0026000 Permit exp date 8/31/09 THE following are a frequency of sampling for this NPDES PERMIT. Revision 12/1/09 Wastewater Treatment Plant upset & abnormal flow and/or Storm flow conditions may require accelerated sampling. Sampling frequencies change if present, previous or next week has a holiday EFFLUENT FLOW (MGD) (CONTINUOUS RECORDING) BOD, 5-DAY 3/wk(COMP) NH3-N 3/wk(COMP) TSS 3/wk(COMP) FECAL COLIFORM* 3/wk(GRAB) LL TOTAL RESIDUAL CHLORINE 3/wk(GRAB) pH 3/wk(GRAB) TEMPERATURE DAILY(GRAB) D.O. 3/wk(GRAB) Total Phosphorous Monthly(COMP) Total Nitrogen Monthly(COMP) Total Copper 2/month (COMP) Total Zinc 2/month (COMP) Total Mercury weekly (GRAB) Chronic Toxicity Quarterly(MARCH, June, September, December)(COMP) INFLUENT FLOW (MGD) (CONTINUOUS RECORDING) BOD, 5-DAY 3/wk(COMP) TSS 3/wk(COMP) UPSTREAM & DOWNSTREAM Jan -May & Oct -Dec Summer Months June -September TEMPERATURE 1/Wk (GRAB 3/wk (GRAB D.O. 1/wk(GRAB) 3/wk (GRAB) Revision 12/1/09 * Effluent Fecal Coliform sampling will be increased up to 1/day during abnormal flow due to storm flow conditions. Corporon, Joe From: Sent: To: Subject: Hyatt.Marshall@epamail.epa.gov Thursday, January 14, 2010 1:47 PM Corporon, Joe RE: Renewal Tabor City NC0026000 - I&I thanks for sending - EPA has no comments. 1 AFFIDAVIT OF PUBLICATION NORTH CAROLINA Cumberland County Public Notice North Carolina Environmen tal Management ' Commission/NPDES Unit 1617 Mail SCRice Center Raleigh. NC 27699-1617 Notice of Intent to Issue a NPDES Wastewater Permit TLC North Carolina Environ - mental Management Corn - mission proposes to issue n NPDES wastewater dis- charge permit to the person(s) listed below. Written comments regamling the proposed permit will be accepted until 30 days after the publish date of this no- tice. The Director of the NC Division of Water Quality (DWQ) may hold a public hearing should there be a significant degree of public interest. Please mail com - ments and/or information re- quests to DWQ at the above address. Interested persons may visit the DWQ at 512 N. Salisbury Street, Raleigh, NC to review information on fie. Additional information on NPDES permits and this no- tice may be found on our website: www.ncwaterquali - tyy.org, or by calling (919) 807.6307. Laurinb rg-Maxton Airport Commission requested re- newal of permit NC0044725 for LMAC W WFE in Robeson County. This permitted dis- charge is heated damesticrndustrial waste - water to the Lumber River in the Lumber River Basin. Tabor City (NC0026000) has applied for NPDES permit re- newal (discharge to UT of Orissett Swamp, Lumber River Basin). Notice of Intent to Issue a NPDES Wastewater Permit 1951424 Before the undersigned, a Notary Public of said County and state, duly commissioned and authorized to administer oaths, affirmations, etc., personally appeared. CINDY L. OROZCO Who, being duly sworn or affirmed, according to law, doth depose and say that he/she is LEGAL SECRETARY of THE FAYETTEVILLE PUBLISHING COMPANY, a corporation organized and doing business under the Laws of the State of North Carolina, and publishing a newspaper known as the FAYETTEVILLE OBSERVER, in the City of Fayetteville, County and State aforesaid, and that as such he/she makes this affidavit; that he/she is familiar with the books, files and business of said Corporation and by reference to the files of said publication the attached advertisement of CL Legal Line NPDES WASTEWATER PERMIT of NC DIVISION OF WATER QUALITY was inserted in the aforesaid newspaper in space, and on dates as follows: 12/18/2009 and at the time of such publication The Fayetteville Observer was a newspaper meeting all the requirements and qualifications prescribed by Sec. No. 1-597 G.S. of N.C. The above is correctly copied from the books and files of the aforesaid corporation and publication. Qc5-) LEGAL SECRETARY Title Cumberland County, North Carolina Sworn or affirmed to, and subscribed before me, this 18 day of December, A.D., 2009. In Testimony Whereof, I have hereunto set my hand and affixed my. official seal, the day and year aforesaid. amela H Walters, Notary Public My commission expires 5th day of December, 2010. MAIL TO: NC DIVISION OF WATER QUALITY 1617 MAIL SERVICE CENTER RALEIGH, NC 27699 0001951424 Permit Renewal Staff Report Date: November 17, 2009 To: DWQ NPDES Permitting Unit Attn: Jeff Poupart/Jo Corporon From: Linda Willis, Env. Eng. I, WiRO SWPS DWQ Through: Rick Shiver, Wilmington Regional Supervisor, SWPS, DWQ Subject: Permit Renewal Staff Report for Tabor City NC0026000 Part I: General Information 1. Facility Address: Town of Tabor City Hwy 701 Bypass Tabor City, NC 28463 Mailing Address: P.O. Box 655 Tabor City, North Carolina 28463 2. ORC: Stephanie Moore Employer: (Contractor) Meritech, Inc. 910-617-1353 3. Directions to Site: Travel south on Hwy 701 to Tabor City, turn left onto Hwy 701 Bypass. Travel 0.5 miles and turn left at the dirt road. Plant is 0.22 miles down the dirt road. 4. Discharge Point: Latitude 34°08'56" Longitude 78°51'26" Elevation: 71' AMSL 5. Receiving Stream: UT to Grissett Swamp Classification: Class C-Sw waters of the state. Downstream Uses: Fishing dependant upon water levels Part II: Description of Discharge and Treatment Works: 1. a. Volume of wastewater to be permitted: 1.1 MGD b. What is the current flow limit? 1.1 MGD c. Actual treatment capacity: Unknown. d. Date and construction activities allowed by A to Cs: A to C was granted in March 2007 for WWTP and Sewer improvements. Installation of new 2,000 gpm, 50 HP pump at the influent pump station, construction of new 1.4 MG HDPE lined flow EQ basin, new mechanical bar screen, refurbishment of existing grit removal system, new flow splitter box, demo of two existing aeration basins and construction of two new aeration basins (1.3 MG total), three new 25 HP aerators, one 50 HP and one 25 HP existing aerators in basin one, and three existing 50 HP aerators in basin two, two new UV disinfection systems in the existing chlorine contact chamber installed in series (each capable of treating a peak flow of 2.75 MGD), modifications to existing lab building, a new 656 fl laboratory building, a new sludge loading station, and replacement of 2,082 linear feet of 12 inch sewer line. e. Description of existing wastewater treatment facilities: The facility has an influent lift station with 3 pumps (one new 2,000 gpm, 50 HP pump and two existing 50 HP pumps). Headworks consist of two grit channels, one with mechanical bar screen and the other a manual bar screen and parshall flume to the mechanical rolling air grit removal system and splitter box. Flow splitter box splits flow to two aeration basins with mechanical aerators. Basin 1 has four (4) 25 HP (3 new, 1 existing) and one (new) 50 HP aerator. Basin 2 has three existing 50 HP aerators. The aeration basins provide a combined capacity of 1.3 MG. One new 1.4 MG HDPE lined flow equalization basin with an influent manual valve from the influent lift station and gravity flow decanter back to influent lift station. There are two center feed clarifiers that can operate in series or parallel; one aerated sludge digester, two tertiary filters, submersible aerator, and a chlorine contact chamber (back up) with two UV units in series. f. Description of proposed wastewater treatment facilities: Not applicable. g. Possible toxic impacts to surface waters: Possibly mercury and chlorine. h. Pretreatment Program: Not required. 2. Residuals handling and utilization/disposal scheme: The Town is currently permitted to land app y 50 estimated dry tons of sludge on 116.9 acres under Permit No. WQ0001936. The permit was renewed on 05/15/2009 and expires on 04/30/2014. 3. Treatment Plant Classification: Class III 4. Important SOC, JOC or Compliance Schedule Dates: See comments in Part III. Part III. Evaluation and Recommendations: 1. This facility is on the EPA's Watch List for mercury violations. RO Recommendation: The Town of Tabor City needs to determine the cause of the mercury violations and implement a plan to eliminate all potential sources until the source has been identified. A compliance schedule (recommend 3 months) to research and identify the source is requested. 2. The Town received a Clean Water Management Trust Fund grant (1997A-117) for $570,000.00 to add a tertiary filtration process (deep sand beds) to the wastewater treatment system, prior to chlorination. The Town has the filters in place but has failed to maintain the filters and they are currently not being used. RO Recommendation: Provide a 3 month compliance schedule requiring the Town to; (1) refurbish the tertiary filters for daily operation and (2) build a safe access to the filters because the access ladder is slippery and dangerous for both the operator and the inspectors. Their operator is not physically able to climb the ladder to the tertiary filter platform. The facility now uses UV disinfection, therefore the filters are needed to ensure better effluent quality. 3. WiRO is concerned that the influent lift station pumps overwhelm the headworks at the plant during high flows. RO Recommendation: The RO requests a 90-day compliance schedule for engineering analyses of the headworks. The analyses should provide wastewater elevations through the headworks (grit chamber and bar screen) during peak flow and when the back up pump is operating. 4. The UV disinfection unit is not capable of disinfecting the effluent during plant upsets and high flows as a result of rain events. RO Recommendation: DWQ is requesting a backup disinfection system be required to provide adequate disinfection during high flow situations and upset conditions. Please include TRC limits when back up disinfection is being used. 5. WiRO would like to resolve sampling issues at this facility via the NPDES Permit sampling requirements. Any questions concerning this request, please contact Kipp Glazier at 910-796- 7272. RO Recommendation: Require fecal coliform monitoring 4 times per week (regardless of whether the tertiary filters are operable) with at least 33% of the samples taken between 9:00 AM and 1:00 PM. Require monitoring for all parameters on any day in which an upset is occurring. 6. The ORC does not notify the Region when they are experiencing upsets, when they are bypassing one of their two clarifiers, when they are not using their filters and when they experience an overflow at the headworks or from their sanitary sewer collection system. RO Recommendation: Please remind the Town in the cover letter that the standard conditions in the NPDES Permit requires their notification to this office in the event of any of the above situations and failure to do so is a violation of their NPDES Permit. WiRO appreciates both the site visit by permit writer, Joe Corporon, and the opportunity to comment. WiRO supports renewal of the permit provided the permit reissuance is in accordance with the Lumber River Basin Plan permitting strategy and no adverse public comments are received. We appreciate any effort to include the recommendations provided. CC: WiRO DWQ file NC0026000 (L.Willis) CO DWQ Files DENR / DWQ / NPDES Unit FACT SHEET FOR NPDES PERMIT DEVELOPMENT NPDES Permit NC0026000 INTRODUCTION Town of Tabor City Wastewater Treatment Plant (WWTP), herein called Tabor City or the Permittee, requires a National Pollutant Discharge Elimination System (NPDES) permit to dispose treated wastewater to the surface waters of the state. The permittee's 5-year NPDES permit expired August 31, 2009 and they have requested renewal from the Division of Water Quality (the Division). This Fact Sheet summarizes background information and rationale used by the Division's NPDES Program to determine permit limits and monitoring conditions. Facility Description. The Tabor City WWTP (Table 1) is a 1.1 MGD publicly owned treatment works (POTW) utilizing a Grade III activated sludge wastewater treatment facility to treat domestic wastewater only (no longer services industry). The Tabor City treatment system utilizes: an influent pumping station; Parshall flume; mechanical bar screen; mechanical grit removal; dual -train activated sludge extended - aeration lagoons with mechanical surface aerators; one equalization basin (1.7 MGD); dual clarifiers operated in series; four each, Waterlink Super deep -sand filters (currently bypassed); UV disinfection with back-up gas chlorine / sulfur -dioxide feed system; chlorine contact basin; aerated sludge -holding basin; effluent sampler; ultrasonic flow meter; and a back-up power generator. Table 1. The Tabor City WWTP Facility Information Applicant/Facility Name: The Tabor City WWTP Applicant Address: P. O. Box 655 Facility Address: Tabor City, North Carolina 28463 Permitted Flow (MGD): 1.1 Type of Waste: Domestic Related Permit (s): Land Application WQ0001936 Facility Grade / Permit Status: Grade III, Major / Renewal Drainage Basin: Lumber River Basin County: Columbus, County Miscellaneous Receiving Stream: UT of Grissett Swamp Regional Office: State Grid / USGS Topo Quad Wilmington K 23 NE / Tabor City East, NC Stream Classification: C Swamp 303(d) Listed? No Permit Writer: Joe R. Corporon Subbasin: 03-07-57 Date: 02Sep09 Drainage Area (sq. mi.) 1.0 . ., Lat. 35° 08' 56" Long. 78° 51' 26" Summer 7Q10 (cfs) 0.0 Winter 7Q10 (cfs) 0.0 30Q2 (cfs) 0.0 Average Flow (cfs) 1.0 IWC (%) 90 % Fact Sheet — Tabor City 2009 Renewal NPDES Permit NC0026000 Page I FACILITY RECORDS REVIEW Waste Load Allocation (WLA). The Division prepared the last WLA for the receiving stream in June 1994 and developed effluent limits and monitoring requirements considering an in -stream waste concentration (IWC) of 90 % at 1.1 MGD, considering zero -flow stream conditions. The Division views these limits and monitoring requirements appropriate for renewal except as outlined below (see Permitting Approach Summary). Verifying Existing Stream Conditions. This facility discharges under zero -flow stream conditions to an unnamed tributary of Grissett Swamp [Stream Index No. 15- 17-1-(5)], a Class C Swamp waterbody located within the Lumber River Basin. While not formally listed as "impaired" [not on the Division 303(d) list], Grissett Swamp contributes as one of 11 drainages within the Lumber River Basin with fish advisories for mercury Pretreatment. During the previous permit cycle, the Division reviewed Tabor City's need to implement a Long Term Management Plan (LTMP) or pretreatment program. The Permittee currently has no significant industrial users (see NPDES Application, Form 2A) and has yet to develop an LTMP. Authorization to Construct (ATC). In March of 2007, the Permittee received an ATC permit (NC0026000AO 1) to install modifications and new components summarized as: • lined flow -equalization basin (1.4 MGD HDPE); • new pumps (influent pump station immediately upstream of the headworks); • two (2) new aeration basins (with new aerators); demo the old basins; • new deep -sand tertiary filter system • new UV disinfection system, and • new sludge -loading station The Division received notice on August 20, 2008 that the above work was completed (DWQ's Engineer's Certification Form signed August 15, 2008 by Bill Lester Jr., P.E.). Compliance. Tabor City is currently on EPA's Watch List for mercury violations. The Permittee also received EPA's Administrative Order CWA-04-2010-4751 (308/309 letter) dated October 15, 2009 based on a "show cause" meeting held January 7, 2009 to discus permit violations. Tabor City's compliance history shows "significant non-compliance" for the last half of 2007 and the first half of 2008. Violations include multiple permit limit violations for mercury; limit exceedences for ammonia nitrogen (NH3 as N) Weekly and Monthly Averages; violations for Total Residual Chlorine Daily Maximum; and violations of BOD 5-day Monthly Average limits. This administrative order (AO) required the Permittee to submit a Mercury Minimization Plan for approval and conduct mercury sampling, analysis of the aeration chamber Mixed Liquor Suspended Solids (MLSS), and reporting — preliminary sampling to commence no later than seven (7) days from date the AO was received by the Permittee. Finally, the AO requires compliance to the NPDES permit by July 31, 2010. Fact Sheet — Tabor City 2009 Renewal NPDES Permit NC0026000 Page 2 Correspondence and Site Visits Renewal Application and Attachments. The current permit expired on August 31, 2009, and the Division received the Permittee's timely request for permit renewal (Standard Form 2A) on January 26, 2009 through its consultant, Hobbs, Upchurch & Associates, P.A. The application included the required additional Priority Pollutant Analysis (PPA) data for 2005, 2007 and 2008 (no parameters detected), and the three each second -species Whole Effluent Toxicity (WET) tests (030ct08, 23Jun08, and 28Ju108). Site Visit / Staff Report — Wilmington Regional Office (WiRO). Linda Willis (WiRO), Joe Corporon and Bob Guerra of DWQ's Central Office, conducted a facility inspection on August 5, 2009. At the time of this inspection, the "Interim" ORC reported that Tabor City was having difficulty securing and retaining adequately trained personnel (ORC and backup ORC) to effectively operate this facility. She volunteered that she needs assistance to adjust system operations (to lift greats and manhole covers, to turn valves and divert flow; to access sand filters; and to clean bar screens). WiRO recommends permit renew in accordance with the basin plan, but notes the following specific issues, potentially to be addressed by permit Special Condition: Influent Pump Station — Upon inspection, Staff found the influent pump station (immediately upstream from the headworks) "in alarm." The Operator in Responsible Charge (ORC) called the city's "pump man" because the pump station was not included in her responsibilities. The "pump man" verified that at high flow, the pump -system switch configuration will not run on AUTO without overflowing the WWTP plant headworks (designed and installed by Hobbs -Upchurch). Therefore during periods of high influent (almost anytime it rains), the pump -station operator must remain onsite to manually divert flow. He volunteered that for 6 days previous to the site visit, he remained onsite to manually divert second- or third -pump flow to the EQ basin due to daily thunder storms. For recommended solutions to this problem, see Renewal Summary — Permit Special Conditions. Headworks —Inspection of the headworks showed signs of raw sewage overflow, unreported. Staff took photos of water -erosion trails leading downhill from flush -mounted concrete boxes suggesting loss of untreated sewage to the environment. Influent piping to the headworks and terminating concrete structures appear undersized, too small to handle the influent pump -station if more than one of three available pumps operates at the same time. For recommended solutions to this problem, see Renewal Summary — Permit Special Conditions. UV System Disinfection — Installed in the chlorine -contact chamber (Hobbs -Upchurch), the UV disinfection system floods from upstream, if forced by headworks over -pumping. High rainfall backing up from the river may also flood the disinfection system. Past flood events have shorted out the UV system requiring replacement of both bulbs and electronics. Repair efforts have included raising the walls of the chlorine -contact chamber by two cinder blocks (-16 inches). As repaired however, the UV system still does not adequately disinfect, and the Permittee has resorted to backup chlorination in order to meet fecal coliform limits. The Division suspects that UV disinfection has been rendered effective either, by deepening the trough under the UV bulbs (reducing UV penetration), and/or by inadequate tertiary filtration. For permitting recommendations, see Renewal Summary — Permit Special Conditions. New Sand -Filter System — During the previous permit cycle, the Permittee installed a new multi -story tertiary deep -sand filter system specifically invested to produce effluent suitable for UV disinfection. However, do to this lack of routine maintenance this treatment component is currently bypassed resulting in wastewater inadequately treated for final UV disinfection. Consequently, the Permittee has resorted to back-up disinfection using chlorine. For recommendations, see Renewal Summary — Permit Special Conditions. Fact Sheet — Tabor City 2009 Renewal NPDES Permit NC0026000 Page 3 PERMIT RENEWAL APPROACH DMR Instream and Effluent Flow Data Review. The Division reviewed 30 months of DMRs (January 2007 through July 2007) noting annual flow averages of 0.490 MGD (2007), 0.355 MGD (2008), 0.377 MGD (2009). These flows together average 0.407 MGD or about 37% of permitted capacity over this time period. Whole Effluent Toxicity (WET) Testing. The Division reviewed Tabor City's quarterly WET test records from January 2005 through March 2009 (17 quarterly tests and 4 monthly follow-up tests). Tabor City failed its WET test in September of 2005 and 2006, and again in December 2007 — each episode followed by monthly testing. In each case toxicity was resolved after the second monthly test. No violations have been reported since December 2007. Toxicant Chronic and Acute Impact — Pollutants of Concern (POCs). To establish POCs, the Division reviewed the permit application, discharge monitoring reports (Jan 2007 through July 2009), and the Basin Plan. The Division then used the standard Reasonable Potential Analysis (RPA) to calculate a maximum predicted concentration for each POC, copper, mercury and zinc. Each maximum was then compared to the POC's freshwater Chronic Standard (Table 2) and also to its Final Acute Value (%2 FAV) for freshwater (Table 3). If by the above method, a POC showed reasonable potential to exceed its %2 FAV, the Division inserted a permit limit as a Daily Maximum to protect the receiving stream against acute toxic affects. Similarly, if the maximum exceeded the chronic standard, a Weekly Average limit was added to the permit. Table 2. Town of Tabor City WWTP Chronic RPA Findin Parameter. Samples (n) Hits (n Maximum ' Predicted ' .-Allowable Concentration RP*' ; yin ' Comments / • Renewal Action Copper 60 55 25 µg/L 7.0 µg/L Yes Action Level Standard — no toxicity, therefore no limit; continue monitoring 2/Month Mercury 39 39 62,618 ng/L 12 ng/L Yes No changes to permit (12 ng/L limit; 1/Week monitoring) Zinc 60 60 107 µg/L 50 µg/L Yes Action Level Standard — no toxicity, therefore no limit; continue monitoring 2/Month = reasonable potential to exceed instream water -quality standard. Table 3. Town of Tabor City WWTP Acute RPA Findin Parameter Samples fin) . Hits fin) : Maximum Predicted.. '/2 FAV 1 CMC;' RP* ,y/n`_` Comments > . Renewal Action Copper 60 55 25 µg/L 7.0 µg/L Yes Action Level Standard See Table 2 Mercury 39 39 62,618 ng/L — — No acute limit (Standard based on bio-accumulation) See Table 2 Zinc 60 60 107 µg/L 67 µg/L Yes Action Level Standard See Table 2 = reasonable potential to exceed Instream water -quality standard. Fact Sheet — Tabor City 2009 Renewal NPDES Permit NC0026000 Page 4 RENEWAL SUMMARY Receiving -Stream Monitoring No changes recommended. Effluent Monitoring For Renewal: Because the Permittee may need backup disinfection, the Division has retained the TRC limit and included the following footnote: "Total Residual Chlorine (TRC) shall be monitored only if chlorine is used to disinfect. Because of difficulties quantifying TRC in a wastewater matrix, the Division will consider all TRC values reported below 50 µg/L to be compliant with this permit." Additional Requirements and Special Conditions. Disinfection Mercury Headworks Tertiary Sand Filters Sewer Collection System Data suggest the UV disinfection system is not viable during plant upsets or during high rain events. In such cases the Permittee must revert to chlorination and dechlorination. Therefore, compliance to a Total Residual Chlorine limit will remain in the permit. Mercury limits remain in the permit; A Mercury Minimization Plan is in progress addressing source evaluation, sampling, reporting, and final compliance with the permit (EPA's Administrative Order CWA-04-2010-4751); no additional action required. Data suggest that peak flows overwhelm the WWTP headworks. The permit cover letter shall remind the Permittee that failure to report a sanitary sewer overflow is a permit violation liable to penalty assessment. Furthermore, within 90 days of the permit effective date, the Permittee shall provide an Engineering Analysis of the WWTP headworks design (pipe -sizing, concrete fixtures, grit chamber, and bar screen); headworks operation shall specifically address the impact of peak flows routed via the influent pumping station. This report shall include findings and recommendations for hardware mediation and/or operational adjustments [see Special Condition A. (4.)]. The Permittee shall refurbish the tertiary deep -sand filters, providing regular, routine inspection and maintenance, and bring filters online for continuous operation within 90 days of the Permit effective date [see Special Condition A. (5.)]. Failure to meet this deadline is permit violation liable to penalty assessment. DWQ has correlated storm events with inordinately high flow at the WWTP suggesting that this facility suffers from stormwater inflow and infiltration (1/1). Therefore the Division has added a Special Condition requiring a Collection System Evaluation and Remediation Plan to fund, study, and implement remediation. This plan requires progress reports to the Division before the end of each calendar quarter, and remediation to be completed within thirty (30) months of the permit effective date [see Special Condition A. (5.)]. Fact Sheet — Tabor City 2009 Renewal NPDES Permit NC0026000 Page 5 Increased Sampling WiRO has documented fecal coliform effluent concentrations in violation of the permit limits despite self -monitoring indicating "pass" at the current frequency. DWQ shall therefore increase the monitoring frequency for Fecal Coliform from 3/Week to 1/Day [see A. (1.)] requiring a minimum of three (3) samples collected during peak influent flow (9:00 hrs — 14:00 hrs). This Special Condition shall continue for six (6) months from the permit effective date, after which time the Permittee may petition DWQ to alter the monitoring conditions, as data warrants. PROPOSED SCHEDULE OF ISSUANCE Draft Permit to Public Notice: December 16, 2009 Permit Scheduled to Issue: February 1, 2010 NPDES UNIT CONTACT If you have questions regarding any of the above information or on the attached permit, please contact Joe Corporon at (919) 807-6394. NAME: DATE: REGIONAL OFFICE COMMENTS NAME: DATE: REGIONAL SUPERVISOR: DATE: NPDES SUPERVISOR: DATE: Fact Sheet — Tabor City 2009 Renewal NPDES Permit NC0026000 Page 6 (400 water 0/0-) A Table 1. Project Information Facility Name WWTP Grade NPDES Permit Outfall Flow, Qw (MGD) Receiving Stream Stream Class 7Q10s (cfs) 7Q10w (cfs) 30Q2 (cfs) QA (cfs) Time Period Data Source(s) Tabor City WVVTP III NC0026000 001 1.1 UT of Grissett Swamp C-Swamp 0.0 0.0 0.0 1.0 Jan07 - JuIy09 BIMS / DMRs Table 2. Parameters of Concern Par01 Par02 Par03 Par04 Par05 Par06 Par07 Par08 Par09 Par10 Par11 Par12 Par13 Par14 Par15 Name Type Chronic Modifier Acute PQL Units Copper NC 7 AL 7.3 ug/L Mercury NC 12 .0' ng/L Zinc NC 50 AL 67 ug/L 26000 Tabor City RPA 2009, input 9/3/2009 REASONABLE POTENTIAL ANALYSIS Copper Mercury Date Data BDL=1/2DL Results 1 2007 Std Dev. 2 2007 4 4 Mean 3 2007: C.V. 4 2007. 11 11 n 5 2007; 5 5 6 2007 ..: 7 7 Mult Factor = 1.65 7 2007 ' 9 9 Max. Value 15.0 ug/L 8 2007 11 11 Max. Pred Cw 24.8 ug/L 9 2007 11 11 10 2007 11 11 11 2007:< 16 8 12 2007 12 12 13 2007 9 9 14 2007 14 14 15 2007 < 16 2007 <: 19 10 17 2007•' 14 14 18 2007: , 15 15 19 2007 ':• 15 15 20 2007. < 2 1 21 2007 < 2 1 22 2007, 10 10 23 2007, 5 5 24 2007i 4 4 25 20071 14 14 26 2007 3 3 27 2007 2 2 28 2007 29 2007 30 2007 31 2008 8 8 32 2008 33 2008:. 4 4 34 2008! 4 4 35 2008! . 0 0 36 2008! 4 4 37 2008!. 7 7 38 2008 39 2008 5 5 40 2008'`. 7 7 41 2008: ` 2 2 42 2008 7 7 43 2008 44 2008• 2 2 45 2008:. 2 2 46 2008 2 2 47 2008: 48 2008'' ' 2 2.0 49 2008 3 3.0 50 2008. 2 2.0 51 2008 . 2 2.0 52 2008 6 6.0 53 2008 5 5.0 54 2008 10 10.0 55 2008 8 8.0 56 2008' 9 9.0 57 2008 7 7.0 58 2008 0 0.0 59 2008•• ' 60 2008' 61 2008, 62 2009 63 2009 , 5 5.0 64 2009 ., 65 2009' `;; 6 6.0 66 2009. 0 0.0 67 2009'. 7 7.0 68 2009 ..,,1 10 10.0 69 2009 ;:, 9 9.0 70 2009 3 3.0 4.1 6.6 0.6 60 Date Data BDL=1/2DL Results 2008 Std Dev. 1524 2008 19.4 19.4 Mean 369 2008f '. 21.5 21.5 C.V. 4 2008t' 17.4 17.4 n 39 2008 f:' 36.1 36.1 2008 ;''.7°- 7.62 7.6 Mult Factor = 6.55 2008?`;: 8.26 8.3 Max. Value 9560 ng/L 2008 i%`r 7.97 8.0 Max. Pred Cw 62618 ng/L 2008}.;;; 25.7 25.7 2008f.;''! 690. 690.0 2008 s,1;: 54.4 54.4 2008 , 128. 128.0 2008 d=5 + 76. 76.0 2008 : • 92.9 92.9 2008 L 206. 206.0 2008F.s 1010. 1010.0 2008 151. 151.0 2008 4 6.87 6.9 2008; - 35.1 35.1 r 2008:-�y1 46.2 46.2 2008 K 15.2 15.2 2008,E> ▪ 424. 424.0 2008 26.9 26.9 2008 P `y 9.14 9.1 2008 92.5 92.5 2008 47.5 47.5 2008 Holiday 2008 Lt." Holiday 2008 KHoliday 2008 il193. 193.0 2009 Holiday 2009 357. 357.0 2009 t; + 19. 19.0 2009 ?:r,;, Holiday 2009 i 238. 238.0 2009 i.&• 10.7 10.7 2009?< 10.1 10.1 2009 ` 66.9 66.9 2009 107. 107.0 2009 ,I 9560. 9560.0 2009 %' 274. 274.0 2009` 275. 275.0 20091,,,..d�y 15.2 15.2 2009 i 7.73 7.7 2009 is;ft. 8.91 8.9 i.r 1:-1 26000 Tabor City RPA 2009, data - 4 - 9/3/2009 REASONABLE POTENTIAL ANALYSIS 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 2009 2009. 5 5.0 2009. 12 12.0 2009 ` 8 8.0 2009 2009 8 8.0 2009 8 8.0 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 -5- 26000 Tabor City RPA 2009, data 9/3/2009 REASONABLE POTENTIAL ANALYSIS Zinc Date Data BDL=112DL Results 1 2007 • 32 32.0 Std Dev. 14.4 2 2007 Mean 38.9 3 2007. 58 58 C.V. 0.4 4 2007 45 45 n 60 5 2007- 36 36 6 2007 60 60 Mult Factor = 1.37 7 2007 56 56 Max. Value 78 ug/L 8 2007! 48 48 Max. Pred Cw 107 ug/L 9 2007 41 41 10 2007 73 73 11 2007' 48 48 12 2007` 42 42 13 2007 45 45 14 2007, 15 2007: 78 78 16 2007, 53 53 17 2007: 37 37 18 2007', 55 55 19 2007 17 17 20 2007 13 13 21 2007 50 50 22 2007 47 47 23 20071 26 26 24 2007 58 58 25 2007: 27 27 26 2007:20 20 27 2007' 28 2007' 29 2007, 30 2007' 53 53 31 2008 32 2008i • 45 45 33 2008 59 59 34 2008 39 39 35 2008! 37 37 36 2008, 27 27 37 2008' 38 2008 25 25 39 2008: 32 32 40 2008: 37 37 41 2008i 35 35 42 2008' 43 2008: 41 41 44 2008 • 38 38 45 2008. 28 28 46 2008' • 47 2008 37 37 48 2008i 44 44 49 2008. 19 19 50 2008'. ' 18 18 51 2008: 33 33 52 2008' 34 34 53 2008 40 40 54 2008, 39 39 55 2008' 44 44 56 2008' 33 33 57 2008 24 24 58 2008, 59 2008 60 2008 61 2008 62 20091 29 29.0 63 2009, 64 2009' 27 27.0 65 2009 13 13.0 66 2009 • 29 29.0 67 2009 , 27 27.0 68 2009 44 44.0 69 2009' 24 24.0 70 2009 -7- 26000 Tabor City RPA 2009, data 9/3/2009 REASONABLE POTENTIAL ANALYSIS 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 103 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 2009 28 28.0 2009' 72 72.0 2009' 50 50.0 2009: 2009 34 34.0 2009', 29 29.0 2009 -8- 26000 Tabor City RPA 2009. data 9/3/2009 Hobbs, Upchurch & Associates, P.A. Consulting Engineers 300 S.W. Broad Street • Post Office Box 1737 • Southern Pines, NC 28388 January 23, 2009 NPDES Permitting NCDENR - DWQ 1617 Mail Service Center Raleigh, NC 27699-1617 RE: NPDES Permit Renewal Application Permit # NC0026000 Town of Tabor City Attached please find three (3) copies of the above referenced permit renewal package: liar tile Town of Tabor City Wastewater Treatment P1ant (NC0026000). If you have any questions, please do not hesitate to contact this office. Sincere] HOB BS. UPL IURCI I & ASSOCIATES, P.A. ;Lit Bill Lester .1•., P.E. Enclosures AEG': LVED J A N 2 6 2009 DENR - WATER QUALITY POINT SOURCE BRANCH Southern Pines, NC • Telephone 910-692-5616 • Fax 910-692-7342 • e-mail: info@hobbsupchurch.com Myrtle Beach • Nags Head • Charlotte • Beaufort A A A 1 A ] l Town of Tabor City Wastewater Treatment Plant (NC0026000) Tabor City, North Carolina DMR Dala Summaty Month Flow (mgd) Temperature °C pH Total Residual Chlorine BOD5 Ammonia Nitrogen Average Max. Mtn. Average Max. Min. Max. Min. Average Max. Mtn. Average Max.. Mtn. Average Max. Min. December-05 0.764 1.168 0.607 12.00 16.00 9.00 7.50 7.00 22 130 <100 1.70 5.30 <2.0 0.57 2.50 <0.1 January-06 0.570 1.268 0.425 13.00 15.00 10.00 7.40 7.00 7 110 <100 1.40 6.60 <2.0 0.23 1.20 0.10 February-06 0.544 1.130 0.399 11.00 14.00 9.00 7.40 7.20 18 120 <100 1.80 3.50 <2.0 0.34 1.30 <0.1 March-06 0.422 0.606 0.343 13.00 18.00 10.00 7.30 6.90 41 180 <100 2.70 6.70 <2.0 0.21 1.00 <0.1 April-06 0.367 0.638 0.282 18.00 20.00 15.00 7.30 7.10 15 180 180 3.08 7.30 <2.0 0.22 0.70 0.10 May-06 0.395 0.632 0.315 19.00 23.00 15.00 7.40 7.10 29 140 <100 2.40 6.30 <2.0 0.07 0.20 <0.1 June-06 0.418 0.581 0.324 24.00 25.00 21.00 7.30 7.20 58 580 <100 0.90 3.20 <2.0 0.28 2.40 0.10 July-06 0.372 0.498 0.299 26.00 29.00 22.00 7.60 7.10 0 <100 <100 0.40 2.10 <2.0 0.02 0.10 <0.1 Au8ust-06 0.467 0.668 0.313 27.00 30.00 25.00 8.10 7.30 7.1 100 <100 0.20 2.20 <2.0 <0.1 <0.1 September-06 0.531 0.852 0.319 23.00 25.00 21.00 7.80 7.20 56 450 <100 0.20 2.80 <2.0 0.13 0.40 <0.1 October-06 0.354 0.476 0.300 18.00 21.00 13.00 7.50 7.10 66 280 <100 0.00 <2.0 <2.0 0.06 0.30 <0.1 November-06 0.704 1.825 0.325 16.00 19.00 12.00 7.50 7.10 9 120 <100 3.60 17.30 <2.0 1.40 4.70 <0.1 December-06 0.654 1.408 0.441 13.00 17.00 9.00 7.40 7.00 24 160 <100 1.60 3.60 <2.0 0.01 0.10 <0.1 January-07 0.631 0.947 0.542 13.00 16.00 9.00 7.70 6.90 10 130 <3 0.50 2.70 <2.0 0.03 0.20 <0.1 February-07 0.607 0.921 0.501 10.00 13.00 8.00 7.30 7.10 5 12 <3 2.10 4.30 <2.0 0.00 <0.1 <0.1 March-07 0.512 0.654 0.457 14.00 19.00 11.00 7.40 7.10 6 11 <3 1.10 3.40 <2 0.00 <0.1 <0.1 April-07 0.530 0.995 0.453 16.00 19.00 13.00 7.60 7.20 8 13 3 0.40 2.60 <2.0 0.04 0.20 <0.1 May-07 0.478 0.543 0.425 20.00 23.00 18.00 7.60 7.10 10 21 4 0.80 3.20 <2.0 1 0.00 <0.1 <0.1 June-07 0.446 0.563 0.386 24.00 27.00 21.00 7.60 7.10 8 14 2 0.00 <2.0 <2.0 k 0.02 0.10 <0.1 July-07 0.456 0.572 0.382 26.00 27.00 23.00 7.50 7.10 6 11 <3 0.90 2.90 <2.0 0.00 0.10 <0.1 August-07 0.467 0.631 0.256 28.00 29.00 26.00 7.50 7.10 8 14 <3 1.10 3.40 <2.0 0.01 0.10 <0.1 September-07 0.458 0.511 0.354 24.00 27.00 21.00 7.70 7.00 6 11 <3 1.50 3.30 <2.0 0.05 0.30 <0.1 October-07 0.471 0.929 0.255 22.00 25.00 18.00 7.10 6.80 6 11 <3 1.80 6.20 <2 0.76 6.50 <0.1 November-07 0.459 0.529 0.347 17.00 20.00 15.00 7.20 6.90 6 9 <3 6.60 14.00 <2.0 6.10 18.00 <0.1 December-07 0.372 0.494 0.197 14.00 19.00 9.00 7.40 6.60 7 15 <3 3.20 6.30 <2.0 0.24 1.20 <0.1 January-08 0.334 0.607 0.203 12.00 16.00 10.00 7.00 6.10 8 4 15 3 1.90 4.80 <2.0 0.04 0.30 <0.1 February-08 0.435 0.959 0.264 15.00 18.00 11.00 7.60 6.90 8 <3 3.00 4.10 <2.0 0.29 3.40 <0.1 March-08 0.550 0.820 0.390 16.00 17.00 14.00 7.20 _ 6.60 __ 6.80 5 10 <3 1.70 3.00 <2.0 0.01 0.10 <0.1 April-08 0.364 0.492 0.145 18.00 22.00 16.00 7.10 8 13 3 2.30 2.80 <2.0 0.03 0.20 <0.1 May-08 0.271 0.382 0.211 22.00 24.00 20.00 7.40 6.90 6.90 4 12 <3 0.50 3.40 <2.0 0.09 0.30 <0.1 _ June-08 0.251 0.445 0.133 26.00 28.00 22.00 7.20 5 8 <3 0.70 2.50 <2.0 0.04 0.30 <0.1 July-08 0.245 0.270 0.192 38.00 283.00 25.00 7.30 7.00 9 36 3 1.40 3.00 <2.0 0.09 0.30 <.01 August-08 0.296 0.465 0.218 27.00 29.00 27.00 25.00 21.00 7.20 6.90 15 22 5 2.20 7.20 <2.0 0.18 1.40 <0.1 September-08 0.593 2.124 0.301 25.00 7.10 6.80 13 30 15 5.50 13.30 2.10 1.04 4.00 <0.1 October-08 0.301 0.395 0.251 20.00 24.00 16.00 7.60 6.90 19 16 24 10 3.90 10.80 2.50 0.09 0.50 0.00 November-08 0.284 0.470 0.239 _ 15.00 17.00 10.00 7.20 6.60 25 9 3.30 13.10 <2.0 0.00 <0.1 <0.1 Totals 0.455 ; 2.124 1 0.133 19.31 1 283.00 j 8.00 8.10 1 6.10 15 ! 580 j 2 1.84 i 17.30 1 2.10 0.36 I 18.00 0.00 A 11 J ] 11 1 1 1 1 Al i 1 i Town of Tabor City Wastewater Treatment Plant (NC0026000) Tabor City, North Carolina DMR Dala Summary Month Fecal Coliform Dissovled Oxygen Total Suspended Residue Total Nitrogen(FKN) Total Phosphorus Average Max, ' Mn. Average Max. Mtn. Average Max. Min. Average Max. Mtn. Average Max. Mtn. December-05 2.00 16 <1 9.9 11.2 8.5 15.00 28.00 3.00 9.3 9.3 9.3 1.14 1.14 1.14 January-06 1.00 8 <1 8 9.9 6.8 12.00 25.00 3.00 10.2 10.2 10.2 0.685 0.685 0.685 February-06 1.45 42 <1 9.1 10.4 7.1 11.00 22.00 5.00 13.7 13.7 13.7 0.943 0.943 0.943 March-06 1.32 4 6 8 9.8 5.2 12.00 19.00 4.00 14 14 14 0.867 0.867 0.867 April-06 1.70 14 <1 7.3 9.4 6.7 9.00 18.00 3.00 18.1 18.1 18.1 1.9 1.9 1.9 May-06 2.00 14 <1 7.2 7.8 6.4 8.00 18.00 3.00 20.4 20.4 20.4 1.5 1.5 1.5 June-06 1.00 1 <1 7.5 8.2 6.2 5.00 14.00 1.00 22.9 22.9 22.9 1.95 1.95 1.95 July-06 2.00 11 <1 7.9 9 6.9 2.30 6.00 <1 18.9 18.9 18.9 1.69 1.69 1.69 August-06 5.00 280 <1 8.5 9 7.4 3.00 8.00 <1 19.9 19.9 19.9 2.58 2.58 2.58 September-06 9.00 310 <1 7.4 8.9 6.3 8.00 15.00 2.00 13.9 13.9 13.9 1.4 1.4 1.4 October-06 1.00 12 <1 9 10.1 6.7 5.00 11.00 2.00 21.3 21.3 21.3 2 2 2 November-06 3.00 310 <1 9.2 10.1 8.2 10.00 29.00 1.00 16.1 16.1 16.1 1.65 1.65 1.65 December-06 18.00 310 <1 9.8 11.1 9 15.00 25.00 3.00 14 14 14 1.16 1.16 1.16 January-07 2.00 13 <1 9.5 10.3 9 10.00 22.00 2.00 13.2 13.2 13.2 1.33 1.33 1.33 February-07 3.00 15 <1 9.5 10.4 8.2 12.00 20.00 4.00 12.1 12.1 12.1 1.16 1.16 1.16 March-07 2.00 9 <1 9 10.2 7.4 12.00 24.00 6.00 20.4 20.4 20.4 1.7 1.7 1.7 April-07 3.00 43 <1 8.8 9.3 7.9 9.00 17.00 3.00 28.6 28.6 28.6 1.9 1.9 1.9 May-07 6.00 30 <1 8.5 9.1 7.9 7.00 18.00 1.00 34.2 34.2 34.2 2.63 2.63 2.63 June-07 4.00 46 <1 7.9 8.5 7.5 3.00 5.00 1.00 32.1 32.1 32.1 2.52 2.52 2.52 July-07 10.00 43 <1 7.6 8.2 7.2 8.00 24.00 3.00 35.2 35.2 35.2 3.4 3.4 3.4 August-07 14.00 49 3 7.4 7.8 6.2 9.00 15.00 3.00 32.8 32.8 32.8 a 3.13 3.13 3.13 September-07 10.00 47 _ 1 7.5 8.7 6.8 7.00 14.00 2.00 10.5 10.5 10.5 1.06 1.06 1.06 October-07 4.00 28 <1 6.8 7.5 5.9 6.00 15.00 1.00 31.3 31.3 31.3 3.1 3.1 3.1 November-07 2.00 11 <1 7.8 9 6.6 10.00 18.00 2.00 16.7 16.7 16.7 1.2 1.2 1.2 December-07 45.00 300 <1 7.5 10.2 5.6 4.00 13.00 1.00 14.1 14.1 14.1 1.5 1.5 1.5 January-08 33.00 280 <1 7.3 9.8 5.5 3.00 15.00 0.00 18.4 18.4 18.4 1.58 1.58 1.58 February-08 15.00 340 <1 6.7 7 6.2 7.00 17.00 2.00 15.4 15.4 15.4 1.42 1.42 1.42 March-08 14.00 340 <1 7 7.9 6 5.00 11.00 1.00 13.9 13.9 13.9 1.1 1.1 1.1 April-08 32.00 300 <1 6.8 7.3 5.3 7.00 29.00 1.00 9.09 9.09 9.09 0.955 0.955 0.955 May-08 2.00 22 <1 7.5 8 7 8.00 30.00 <1 8.66 8.66 8.66 1.76 1.76 1.76 4.00 280 <1 7.4 8.2 6.8 4.00 23.00 1.00 9.84 9.84 9.84 1.74 1.74 1.74 _June-08 July-08 70.00 340 <1 6.1 7.4 3.5 3.00 10.00 1.00 9.03 9.03 9.03 1.56 1.56 1.56 August-08 186.00 320 53 5 6.8 2.2 9.00 22.00 3.00 8.12 8.12 8.12 2.09 2.09 2.09 September-08 145.00 360 _ 12 5.4 6.2 4.1 15.00 33.00 7.00 13.6 13.6 13.6 1.21 1.21 1.21 October-08 128.00 335 1 6.4 7.4 5 11.00 18.00 6.00 15.2 15.2 15.2 1.05 1.05 1.05 November-08 73.00 400 <1 7.5 8.1 6.9 16.00 28.00 10.00 12.6 12.6 12.6 0.939 0.939 0.939 Totals 23.76 400.00 ! 1.00 7.77 I 11.20 2.20 8.34 I 33.00 1 0.00 17.44 1 35.20 j 8.12 1.65 I 3.40 1 0.69 TopoZone - The Web's Topographic Map Page 1 of 1 it tea`?' - ,r- - ' . " ,t • 92 _ ``? :-Fcwler• • , 1 5 ` v , ' • - - -, ' \\c - \\ • 0 0.3 0.9 1.2 1.5 km 0 0.2 0.4 0.6 0.8 1 mi ;la�rest Lawn •Ch East: T&bar c Londina Suip •il .M. ti _ ^ U Map center is 34° 08' 56"N, 78° 51' 26"W (WGS84/NAD83) Tabor City East quadrangle Projection is UTM Zone 17 NAD83 Datum q • • T..,v. : M=-8.238 G=1.203 http://www. topozone. com/print. asp?z=17&n=3 78073 8.9151513 2&e=6975 52.13 983 3 481 &... 3/15/2004 1 1 1 1 1 1 1 1 1 1 1 INFLUENT PUMP STAI1ON ACCESS ROAD .- 4 GRIT COLLECTOR HEADWORKS lr Ili III Il, {1 it t / CID CEO ABANDONED" POLISHING BASIN NO. 1 "ABANDONED" POLISHING BASIN IA,\ NO.2 a • TABOR CITY WWTP SITE PLAN GRAPHIC SCALE LEGEND GATE VALVE EXISTING UTILITY POLE �.... ^'"'�.-.. EXISTING GRAVEL ROAD PROPOSED PIPING — — — — EXISTING PIPING "ABANDONED" CAUSTIC SEITIUNG CHAMBER Hg Hobbs, so Upchurch & Associates, P.A. ConsultingEngineers so SOUTHERN PINES, NC — MYRTLE BEACH, SC HOI.L DEVIL HILLS, NC — RALEIGH, NC 290 S.W. Brood Street, Southern Pines, North Carina 28387 Phone: (910) 692-5616 — Fax (910) 692-4795