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Home My WebLink AboutNC0023906_Historical information wilson 2013_20131231Hayes, Mitch Mitch, 1 From: Sent: To: Cc: Subject: In addition, we did lose some MLSS onto the ground from the BNR tanks as a result of the high levels we were maintaining. We have some small port holes in the outer basin walls that can result in minimal release from the outer wall once we reach a certain level. We estimate that maybe 20-50 gallons made it onto the ground. Operators were quick to respond. They dug a hole, placed a sump pump, and returned all materials to the basins. None of this material ran off from the isolated area, and nothing reached the stormwater collection system or waters of the State. And finally, as a result of the temporary loss of solids, the turbidity meter at the splitter box did exceed our max Turbidity limit of 10 NTU per our Reuse water permit. However, even though this meter is the specified monitoring point, due to its location, it does not represent water that entered the Reuse distribution system. We have another certified turbidity meter at the wet well that contains the pumps for the Reuse distribution system. Turbidity at this meter never exceeded 10 NTU. I need to confirm, but I don’t think it ever exceeded 2 NTU. As a built-in precaution, our system is designed to lock-out the Reuse pumps anytime the turbidity exceeds a pre-set threshold. That threshold was set at 5 NTU. In addition to that, operators recognized earlier that we could possibly lose solids at some point in the evening, so they had already disabled the pumps as an added precaution by switching them from AUTO to OFF. In previous conversations with Matthew Fleahman (formerly with NCDENR), he understood our set-up and had previously told me this would not be viewed as an exceedance of our permit's Turbidity limit since the water entering the distribution system had never exceeded 10 NTU. His instructions in the past have been for me to enter the result obtained from the permit specified meter on our monthly monitoring report and then provide additional information in the comments section to explain the circumstances. I will continue to do as previously instructed by Matthew when I submit my monthly monitoring reports for December, unless of course. I hear otherwise from NCDENR. Sincerely, Jimmy As always, I greatly appreciate your support and assistance in these matters. Please let me know if you have any questions, need any additional information from me, or if you need any additional paperwork or other documentation completed and submitted. Jimmy Pridgen [jpridgen@WILSONNC.ORG] Monday, December 30, 2013 5:16 PM Hayes, Mitch Barry Parks City of Wilson WWTP information This letter serves as follow-up to our verbal phone conversation that we had around 4 pm this afternoon. I contacted you then to provide you with information regarding operations at the City of Wilson WWTP last night (Sunday evening) as we dealt with a severe rainfall event. At approximately 6 pm on Sunday evening (12/29/2013), after trying our best to prevent any solids from escaping the system, the hydraulic loading of the plant exceeded our max ability and we began to lose solids from the secondary clarifiers. This lasted for approximately one and one half hours. The effluent sampler was on and samples were collected. With the exception of Total Suspended Solids, there were no abnormalities in the results obtained from the 24 hour composite sample collected this morning. We did obtain a result of 35 mg/L for TSS. However, that single value is within our weekly permit limit of 45 mg/L. The plant has returned to normal operation and we expect our TSS for tomorrow to return to its typical daily value of <2.50 mg/L. We do not foresee exceeding any permit limits as a result of last night's challenges. 2 Pursuant to North Carolina General Statutes, Chapter 132,et.seq., this electronic mail message and any attachment hereto, as well as any electronic mail message(s) that may be sent in response to it may be considered public record and as such are subject to requests for review. City of Wilson Water Reclamation Facility P.O. Box 10 3100 Stantonsburg Rpach Wilson, NC 27894-0Q10 Water Reclamation Manager Office: 252-399-2491 Mobile: 252-205-2519 Fax: 252-399-2209 Email: ipridqenfiwilsonnc.orq Website: www. wilsonnc. orq — V November 4, 2013 Attention:Mr. Ken Pohlig, P.E. SUBJECT: Dear Mr. Pohlig: Respectfully, Thomas D. Dienes, P.E. TDD/ Enclosures:As Stated W:\WILSO\09011\Office\Closeout Documentation\ken pohlig - engineers certification Itr 11-4-13.docx 11/4/2013 Should you have any questions regarding the enclosed or should need additional information, please do not hesitate to contact me. o Please find attached the Engineer’s Certification for the Hominy Creek WWMF project (A To C No. 023906A02). CM LO Infrastructure Finance Section DENR/DWQ 1633 Mail Service Center Raleigh, North Carolina 27699-1633 Engineer’s Certification City of Wilson Hominy Creek WWMF Wilson County A To C No. 023906A02 PN: 09-011 3M^OLDSBORO^t'e POBOX 609 ■'lEL 252.237.5365 FAX 252.243.74£ '. yyWW.GREENENGINEERING^0M GREEN ENGINEERING PLLC WATER, WASTEWATER. SURVEYING, PLANNING, PROJECT MANAGEMENT z z 1 5 201 Engineer’s Certification Thomas D. Dienes, P.E. Signature KIosa 4.Zo\'5 P.E. SealDate Send to: Installation of one 48-inch automated mechanical bar screen and one conveyor belt with associated appurtenances to transport screenings in conformity with the project plans, specifications, and other supporting data subsequently filed and approved by the Department of Environment and Natural Resources. Please note that the 36-inch channel that was permitted to receive an automated mechanical bar screen was not constructed as a part of this project due to funding difficulties. The existing partial height manual screen; however, was replaced with a full height manual bar screen. City of Wilson Hominy Creek WWMF Wilson County A To C No. 023906A02 Issued June 24, 2005 Attn: Ken Pohlig, P.E. Infrastructure Finance Section DENR/DWQ 1633 Mail Service Center Raleigh, NC 27699-1633 I, Thomas D. Dienes, P.E., as a duly registered Professional Engineer in the State of North Carolina, having been authorized to observe (periodically/weekly/full time) the construction of the modifications to the existing 14 MGD Hominy Creek Wastewater Management Facility, with discharge of treated wastewater into the Contentnea River in the Neuse River Basin, hereby state that, to the best of my abilities, due care and diligence was used in the observation of the following construction: I certify that the construction of the above referenced project was observed to be built within substantial compliance and intent of the approved plans and specifications. Registration No. = C SEAL z = i 027372 : S Annual Monitoring and Pollutant Scan .'Ul 0 2 Z013 Parameter COPY Analytical Method Composite Composite Composite Composite Composite Composite Composite Grab Composite Composite Composite Composite Composite Grab Grab Sample Type Composite Grab Composite Composite Composite Composite Composite Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab EPA 200.8 EPA 200,8 EPA 200.8 EPA 200,8 EPA 200.8 EPA 200.8 EPA 200.8 EPA 1631E EPA 200,8 EPA 200.8 EPA 200.8 EPA 200.8 EPA 200.8 SM 4500-CN-E EPA 420.4 SM 4500 NH3 C SM 4500 O-G SM 4500 NOS E SM 4500 N Org SM 4500 O^G~ SM 2540 C SM 2340 C SM 4500 Cl C EPA 1664B EPA 624 EPA 624 EPA 624 EPA 624 EPA 624 EPA 624 EPA 624 EPA 624 EPA 624 EPA 624 EPA 624 EPA 624 EPA 624 EPA 624 1.0 10.0 0.10 0.20 5.0 2.0 10.0 0.05 10.0 10.0 5.0 1.0 10.0 10.0 0.0050 100 50 5.0 5.0 5.0 5.0 5.0 10.0 10 5.0 5.0 5.0 5.0 5.0 ND ND ND ND ND ND ND ND ND ND ND ND 23.4 ND 0.0050 ND ND ND ND ND ND ND ND ND 6.6 ND ND ND ND ug/L ug/L ug/L ug/L ug/L ug/L ug/L ng/L ug/L ug/L ug/L ug/L ug/L ug/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 2 2 2 2 2 2 2 2 2 2 2 2 2 i 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1 Ammonia (as N)___________ Dissolved oxygen______ Nitrate/Nitrite______________ Total Kjeldahl nitrogen Total Phosphorus________ Total dissolved solids_______ Hardness_________ Chlorine (total residual, TRC) Oil and grease Metals (total recoverable), cyanide and total phenols 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 Units of Measurement mg/L mg/L mg/L mg/l mg/L mg/L mg CaCO3/L ug/L mg/L Month: May Year: 2013 James W. Pridgen (252)399-2491 Sample Result ND 9.42 0.948 1.01 0.145 322 * 69 ND ND Number of Samples 1 1 1 1 1 1 1 1 1 Permit No.: NC 0023906 Outfall: 001 Facility Name: Wilson - Hominy Creek WWMF ORC: Date of Sampling 5/7/2013 *_____________ Phone Analytical Laboratory:________Pace Analytical Services and City Of Wilson WWTP Lab Quantitation Level 0.002 0.05 0.05 0.002 0.05 10 0.2 10 5.0 Parameter Quantitation Level Sample Result Units of Measurement Number of Samples Analytical Method Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 624 EPA 624 EPA 624 EPA 624 EPA 624 EPA 624 EPA 624 EPA 624 EPA 624 EPA 624 EPA 624 EPA 624 EPA 624 EPA 624 5.0 5.0 5.0 50 5.0 5.0 5.0 5.0 5.0 10.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 10.0 20.0 50.0 5.0 50.0 25.0 5 10.0 5.0 5.0 5.0 5.0 10.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1 2 2 2 2 2 2 2 2 2 2 1 1 2 2 2 2 2 2 2 2 2 i i_ i_ i Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Sample _________________Type Volatile organic compounds (Cont.) 1,1 -dichloroethylene 1.2- dichloropropane 1.3- dichloropropylene Ethylbenzene_________ Methyl bromide Methyl chloride__________ Methylene chloride _______ 1,1.2,2-tetrachloroethane T etrachloroethylene Toluene________ 1.1.1- trichloroethane_________ 1.1.2- trichloroethane Trichloroethylene Vinyl chloride_____ Acid-extractable compounds P-chloro-m-creso 2-chlorophenol__________ 2.4- dichlorophenol__________ 2.4- dimethylphenol__________ 4.6- dinitro-o-cresol______ 2.4- dinitrophenol 2-nitrophenol 4-nitrophenol_________ Pentachlorophenol_______ Phenol___________________ 2.4.6- trichlorophenol_______ Base-neutral compounds Acenaphthene_______ Acenaphthylene______ Anthracene_____________ Benzidine _____________ Benzo(a)anthracene______ Benzo(a)pyrene________ 3,4 benzofluoranthene______ Benzo(ghi)perylene_________ Benzo(k)fluoranthene________ Bis (2-chloroethoxy) methane Bis (2-chloroethyl) ether_____ Bis (2-chloroisopropyl) ether Bis (2-ethylhexyl) phthalate 4-bromophenyl phenyl ether Butyl benzyl phthalate_______ 2-chloronaphthalene_______ 4-chlorophenyl phenyl ether Parameter iVt ie Signature ~?i-' /J 'S Collected and Analyzed Analytical Method Quantitation Level Sample Result Units of Measurement Number of Samples Sample _____________Type Sase-neutral compounds (cont.) Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab EPA 625 EPA 625 EPA 625 EPA 625 EPA 624 EPA 624 EPA 624 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 EPA 625 5.0 5.0 5.0 5.0 5.0 5.0 5.0 25.0 5.0 5.0 5.0 5,0 5.0 5.0 5.0 5.0 5.0 10.0 5.0 5.0 10.0 5.0 5.0 5.0 5.0 10.0 5.0 5.0 5.0 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 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_______ lndeno(1,2,3-cd)pyrene Isophorone Naphthalene__________ Nitrobenzene N-nitrosodi-n-propylamine N-nitrosodimethylamine N-nitrosodiphenylamine Phenanthrene Pyrene 1,2,4,-trichlorobenzene ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L I certify under penalty of law that this document and all attachments were prepared under my direction and supervision in accordance with a system to design to assure that qualified perdonnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons that manage the system, or those persons directly ior gathering the information, the aware that there are significant penalties for submitting false information, including the possibility of fines and imprisonment for knowing violations. ------------------------ James W. Pridgen Atrtkio r i z e d^Bepfese n t; / Date ’ Analysis for the following parameters were collected on tne dates as noted: on 06/20/2013 and Chloride Collected and Analyzed on 05/\5/2013. NORTH CAROLI NA Co August 27, 2013 Subject: Dear Sir or Madam: Sincerely, iation Manager WILSO WILSON The report is based on fiscal year July 1, 2011 - June 30, 2012. The report is submitted as required by the N. C. Clean Water Act of 1999. CERTIFIED MAIL RETURN RECEIPT REQUESTED Enclosed are three copies of the City of Wilson’s 2013 Wastewater Collection and Treatment System Report. The reports were mailed to customers during August 2013. Please contact me at (252) 399-2491 or via email Qt jpridgen@wilsonnc.org if you need additional information. . /U a* Jimmy Ph(dg( Water Rei cc: Barry Parks, Director of Water Resources Regional Supervisor, DWR Raleigh Regional Office - Surface Water Protection System Performance Annual Report NC DWQ 1617 Mail Service Center Raleigh, North Carolina 27699-1617 2013 Wastewater Collection and Treatment System Report City of Wilson - Hominy Creek Water Reclamation Facility NPDES Permit No. NC0023906 CITY OF WILSON INCORPORATED 1849 Treatment Plant City TVas the Facility compliant with permit requirements9 Unknowi 06/14/2013 12:30 AM Volume reached surface waters (gallons): 0Unknown If Yes, estimated number of fish killed9 NAJnknownDid the 06/14/2013 Title Water Reclamation ManagerSignature. Teh lone Number 1Page02:40 PMUpset Form May 20. 2008 Incident Started Dt: ------------------------ (mm-dd-yyyy) Estimated volume of the Bypass/Upset Describe how the volume was determined This form shall be submitted to the appropriate DWQ Regional Office within five days of the first knowledge of the unanticipated bypass or upset. Facility Owner Incident End Dt: (mm-dd-yyyy) Region. County Time: hh:mm AM/PM Bypass/Upset Reporting Form 5 Day Report PART I Were samples taken during bypass9: 06/13/2013 T ime. ------- hh:mm AM/PM 37,000 (Always use treatment plant permit number) Incident # Raleigh Wilson Hves | | No 8:30 PM Al ^52) 39^2491 Weather conditions dunng bypass/upset event: Did Bypass/Upset reach surface waters? | N/A Surface water name _______________ ____ bypass/upset result in a fish kill? | j/es [^]no SPECIFIC cause(s) of the Bypass/Upset: Sensors to both pumps in under-drain pump station were damaged during storm while power was flickering. Pumps failed to operate. High level alarm was acknowledged by operator but was not followed up on due to dealing with extreme weather conditions and power outages at multiple off-site pump stations. With pumps inoperable, water eventually overflowed lowest point at first upstream manhole. That manhole was in an area not easily observed and bypass was not discovered till shortly after midnight. Bypass was stopped by shutting down dewatering operations that feed this station. Water flowed onto the ground for approximately 1,000 feet before flowing onto paved roadway where it was observed. Approximately 7,000 gallons remained on ground. Remaining 30,000 gallons flowed to emergency containment pond. Water was contained there and pumped back into treatment system the following morning. Containment pond was also flushed with fresh water and pumped back into treatment system. Vac-truck was used to remove ponded water and residuals remaining on the ground. Other residuals that could not be easily reached were removed with back-hoe and positioned so vac-truck could remove. Materials collected by Vac-truck were placed in WWTP drying beds. No residuals were observed in the containment pond. No water reached surface water. SPECIFIC location of the treatment units bypassed or where the upset occurred in the facility. Filtrate from the Gravity Belt Thickener was spilled from the manhole upstream of the under-drain pump station. [2 Yes | | No I I Unknown Any additional information desired to be submitted should be sent to the appropriate Division Regional Office within Kejjays ofJust-krfowledge of the Bypass with reference to the incident number (the incident number is only generated when electronic entry of this form is completed, if used) Person submitting claim: Jimmy Pridgen As a representative for the responsible party. I certify that the information contained in this report is true and accurate to the best of my knowledge gallons DeternUrwd by esUinating (low mle of Cravi'.y B»-!i Thickeim for 4 hours. Subtracted vohune estimated to be contained tn wet well and upstream piping Severe thunderstorm that caused widespread damage and power outages. event: -------- LjYes DU No > i O I Permit Number NC0023906 Hominy Creek WRF City of Wilson Wilson, NC C’1' Mission Protecting our Environment and Water Quality, through Teamwork Statement and Excellent Service, now and for future generations. For More Water Quality Information Average Permit Limit Total Phosphorus Average Permit Limit Total Suspended Solids Average Permit Limit Total Nitrogen Pounds Discharged Permit Limit Fecal Coliform Average Permit Limit Chronic Toxicity Test Performed Quarterly Permit Limit Flow Average Permit Limit City of Wilson Water Reclamation Facility (252) 399-2492 www.wilsonnc.org June 7, 2013 2600 block of Forest Hills Rood Total: 1,000 gallons June 7, 2013 700 block of Vance Street E Total: 3,300 gallons June 7, 2013 800 block of Gold Street E Total: 1,225 gallons Wedgewood Reuse Tank N.C. Environmental Education www.eenorthcarolina.org NCDENR Tel (919)733-2321 www.ncdenr.gov NPDES PERMIT COMPLIANCE The WRF was compliant with all NPDES permit limits this year. AFFILIATIONS The City of Wilson Water Reclamation Division is affiliated with the following organizations: • Water Environment Federation • American Water Works Association • N.C. Water Quality Association • N.C. Water Environment Association • N.C. Water Works Association • N.C. Pretreatment Consortium J"'7^ over 3.1 billion Plant Performance Pollutant Concentration used by area WATER’S WORTH IT™ www.waters-worth-it.org WATER'S WORTH IT™ is a trademark of the Water Environment Federation Table Definitions & Key PPM (Parts per Million) - a unit of measurement. Parts per million compares to 1 minute in 2 years. BOD (Biochemical Oxygen Demand) - a required test that determines the amount of oxygen required by mi croorganisms to consume pollutants. BOD is measured in PPM. TSS (Total Suspended Solids) - a required test that measures the amount of suspended solids in a sample. TSS are measured in PPM. FC (Fecal Coliform) - a required test used to determine the presence of disease causing organisms FC are harmless but are used as indicators of other organisms (if FC are present others may be present). FC is measured as number of colonies per 100 milliliters of sample. MOD (Million Gallons per Day) - a unit of measure ment for flow volume. Customers who observe a SSO should report these as emergencies to the Public Services Department between the hours of 7:30 am - 4:00 pm at 399-2480 or the afterhours emergency line at 399-2444. Clientes que observen el desbordamiento de alcantaril las sanitarias deben reporter estos como emgergencias al el departamento de servicios publicos, telefono 399-2480 entre las horas de 7:30 am a 4:00 pm o el 399-2444 despues de horas laborables. The Water Reclamation Fa cility (WRF) is located in Wilson at 3100 Stantons burg Road. It is a state-of- the-art regional treatment plant that processes waste water for approximately 20,000 metered customers and a service population of approximately 50,000. The City of Wilson also treats wastewater from the Town of Black Creek, the Town of Lucama, and the Town of Sims. The term water reclamation defines the treatment or processing of wastewater to make it reusable with spe cific treatment reliability. Reclaimed water must also comply with very stringent water quality criteria. The term water reuse defines the use of treated wastewater for beneficial uses such as agricultural irrigation and industrial cooling. The City of Wilson is committed to using reclaimed water in areas that drinking water is not needed such as irrigation water for Wedgewood Golf Course, Burt Gillette Athletic Complex, and industrial process/cooling water. The reclaimed water system is part of the City's water conservation plan. March 15, 2013 4600 block of Nash Street NW Total: 45 gallons Cause - Grease June 3, 2013 Intersection of Jayne Lane and Lancaster Road Total: 200 gallons Cause - Heavy rain Ammonia Nitrogen PPM Average 0.03 Permit Limit 1.0/3.0 (monthly/weekly) Biochemical Oxygen Demand PPM 0.20 5.0/7.5 (monthly/weekly) PPM 0.28 2.00 (quarterly) PPM 0.04 30.00 Lbs/Yr 51,608 157,886 Colonies/100 milliliters (ml) of sample 3/100 ml 200/100 ml Passed all Pass or Fail Million Gallons per Day (MGD) 8.52 14.00 How Does Ybur Publicly Owned Treatment System Work? The treatment system uses the same physical, chemical, and biological processes used by nature to clean water. Everything we know about water, chemistry, bacteria, hygiene, and engineering has gone into this system we use to purify our wastewater. The City maintains about 350 miles of sanitary sewers lines (piping system that collects and transports the wastewater) and 20 pumping stations that help carry wastewater from homes, schools, commercial buildings, and industrial sources to the treatment plant. Once at the WRF the treatment process begins. The treatment plant is designed to treat 14 MGD. The plant currently averages treating 8.5 MGD. The following describes the treatment process: Physical Methods - Primary Treatment • Bar Screens - catch and remove large material (wood, rocks, etc) as they flow past. • Grit Chamber - removes heavy particles that settle rapidly like gravel, sand, seeds, and coffee grounds. As the water enters the chamber, gravity causes the grit to settle to the bottom. • Sedimentation (settling) Tanks - as water flows into the tanks, heavy organic particles settle to the bottom and are withdrawn and pumped to the solid handling facilities for additional treatment. Floatable material is skimmed off and pumped to the solids handling facilities. Primary treatment removes approximately 45% of the pollution. Biological Methods - Secondary Treatment • Activated Sludge - wastewater is mixed with microorganisms. During constant aeration (mixing air containing oxygen into the wastewat^jhfr microorganisms (bacteria) absorb oxygen and feed on the pollutants. • Final Settling Tanks - solids made up of microorganisms from the activated sludge process settle to the bottom. Some of the microorganisms are sent back to the activated sludge process to continue eating pollutants and some are removed and sent to the solids handling facilities for disposal. Secondary treatment removes approximately 95% of the pollution; HOWEVER, in order for the WRF to comply with permit limits additional treat ment is needed. Physical/Chemical/BiologicaI Methods - Advanced Treatment • Nutrient Removal - nutrients (phosphorous and nitrogen) can cause an over abundance of algae growth in waterways. As the algae dies bacteria feed on the decaying matter using up oxygen needed by fish and other aquatic life. This depletion of oxygen can lead to fish kills. Phosphorous and nitrogen are removed biologically and chemically at the treatment plant. • Filtration - removes those particles that primary and secondary treatment could not remove. The wastewater passes through sand filters that remove remaining particles. Filtration removes 99.9% of the pollution. • Disinfection - the final stage of treatment uses sodium hypochlorite (liquid bleach containing chlorine) to disinfect the water. Disinfection kills off any disease-causing organisms that may remain after passing through the other treatment steps. Chlorine can cause problems in rivers and streams so we remove the chlorine before discharging the treated water to Contentnea Creek. Returning the Water to Nature or Reusing the Water Most of this clean water - now called effluent - is discharged into Contentnea Creek but some of the effluent is sent to the City's reclaimed water system (beneficial reuse) to be used for irrigation or industrial process water and cooling water. What's Left Behind Now, what about the material that has been removed from the water? These solids are called residuals: heavy matter that must be treated in order to safely return to the environment. The following steps are used to further treat the residuals: • Enclosed, heated tanks called digesters use microorganisms to turn the residuals into inert (inactive) harmless organic matter. • Belt filter presses are used to remove water from the residuals to reduce the volume that must be disposed of. • Land application (beneficial reuse) of treated residuals. The treated residuals (organic material) are farmers as a fertilizer and soil amendment. Biogas A by-product of the digestion process described above is the production of methane gas (biogas). The WRF uses part of the biogas produced as fuel to heat the digesters, thus significantly reducing the amount of time required to digest the solids. The excess is burned off by a waste gas burner. The City has future plans to install a system that will utilize the excess biogas to generate energy that can be used to operate other equipment or used for green energy credits. DISPOSABLE DOES NOT MEAN FLUSHABLE Flushing paper towels and other garbage down the toilet wastes water and can create sewer back ups and SSOs. The related costs associated with these SSOs can be passed on to ratepayers. Even if the label reads "flushable", you are still safer and more environmentally correct to place the item in a trash can. The following is a partial list of items that should not be flushed: X Baby wipes, diapers X Rags and towels X Cotton swabs, medicated wipes (all brands) X Syringes X Candy and other food wrappers X Clothing labels X Cleaning sponges X Toys k X Plastic items X Aquarium gravel or kitty litter X Rubber items such as latex gloves X Cigarette butts X Sanitary napkins X Hair X Underwear X Disposable toilet brushes t T'ssues (nose t'ssues' brands) WHAT THE CUSTOMER CAN DO TO HELP In order to help the City of Wilson continue a high standard of water quality and protection of the environment, please follow these simple steps: DO NOT pour grease, fats, and oils from cooking down the drain - • y instead, collect the grease in a container^ and dispose of it in the\ garbage. DO NOT use the toilet as a wastebasket - place wastebasket in each bathroom for the disposal of solid waste, disposable dia pers, condoms, and personal hygiene products that DO NOT belong in the sewer system. DO NOT use the sink to dispose of food scraps - instead, place food scraps in the garbage for disposal with solid wastes, or better yet, start a compost pile. SANITARY SEWER OVERFLOWS (SSOs) Infiltration/inflow (l/l) is unwanted water that enters the sewer collection system through deteriorating older pipes, leaking .. manholes, illegal connections such as roof drains, etc. During heavy rains, pipes can become overloaded from l/l and cause SSOs. Pipe stoppages caused by fats, oils, and grease can also lead to SSOs. Replacing and rehabilitating these lines and RS' . ; manholes reduces l/l into the sanitary sewer system, thus protecting the public health, improving treatment plant efficiency, and reducing system maintenance. Generators provide emergency back-up power for pump stations and help prevent SSOs. During fiscal year 2012-2013, the City of Wilson experienced seven (7) reportable SSOs. The WRF treated gallons of wastewater during this period. Caused by heavy rain from Tropical Storm Andrea June 7, 2013 600 block of Park Avenue Total: 4,020 gallons June 7, 2013 3400 block of Jayne Lane Total: 900 gallons c^. cz> CL. LXJ F £ E a: near Commerce Road. Contentnea Creek eventually flows into the Neuse River. The City of Wilson's Water Re sources Department strives to reduce impact on the environment by operat ing beyond measures required by any permit or rule. Operators and support staff can also earn certifications in the following A It, _ ____ ____ _____o g areas related to our operations: Land Application, Spray Irrigation, Physi- cal/Chemical Treatment, Pretreatment Program Specialist, Wastewater Labo ratory Analyst, and Maintenance Technologist. The process of cleaning our City's wastewater involves not just the men and women of the Water Resources De partment but everyone in our commu- Making clean water would not be possible without community support and water professionals that care. The City of Wilson's wastewater collec tion and treatment system is essential to protecting public health in our commu nity and sustaining water quality in Contentnea Creek and the Neuse River. Untreated wastewater has the potential to contain disease-causing organisms that can make people sick. It also con tains nutrients such as nitrogen and phosphorus that if not sufficiently re moved promote excessive plant growth in the receiving stream and causes a ^^yere reduction in water quality. ^■>per operation and maintenance keeps wastewater from getting out of the collection system and prevents ex posure to the public as well as impact to the environment. Wastewater from the collection system flows to the treat ment facility. During treatment, organic materials as well as nutrients and other contaminants, are removed by utilizing biological, chemical, and physical processes. It is then disinfected to re move harmful bacteria. The final efflu ent discharges into Contentnea Creek What Can You Do to Help? Water is a valuable resource. The City of Wilson, along with other municipalities, is committed to protecting our water quality and preserving our environment. In addition to the tips listed below, please visit www.WatersWorthlt.org to find out more information about how you can help. • Do not take water for granted. The water we have now is all that we will ever have. Use it wisely. • Think before you flush. Everything you send down the pipe ends up in the collection system and travels to the wastewater treatment plant. • Educate yourself. Please take a tour of your local water and wastewater treatment plants to learn what happens to the water that you drink and use. • Stay informed about the water quality issues facing your community by contacting your local municipality and attending public meetings. It Takes a Team of Professionals and a Community’s Support to Make Clean Water This report provides information concerning the City of Wilson's wastewater collection and treatment system performance for July 1,2012 to June 30,2013 as required in the North Carolina Clean Water Act of 1999 (House Bill 1160). Protecting the Neuse River The Lower Neuse River Basin Associa tion, Inc., (LNBA) and the Neuse River Compliance Association, Inc., (NRCA) are 501(c) (3) non-profit corporations comprised of municipalities and indus tries located in the Neuse River Basin. The mission of these organizations is to preserve the waters of the Neuse River and Neuse River estuary through inno vative and cost-effective wastewater treatment and reduction strategies. The NRCA group is composed of 21 wastewater treatment facilities located in the Neuse River Basin. NRCA was is sued North Carolina's first basin-wide NPDES permit for nitrogen control January 1, 2003, and it was renewed January 1, 2008. The group was given a mandate to reduce their Total Nitro gen discharge by 30%. Through the combined efforts of its entire member ship, the NRCA exceeded the man dated 30% nitrogen reduction by removing approximately 70% of their nitrogen loading to the Neuse River es tuary over the past 10 years. The City of Wilson is proud to be o charter member of both the LNBA and NRCA. >> o G5U- c O F Z3 CDro oo E o 2 o o z O) CD O . (fl cu o = lxj m o L" <7 Certified Professionals Making Clean Water According to a recent ar ticle by Reader's Digest on line edition, Water Wastewater System Operators were ranked #2 in their list of the "10 Jobs Americans Can't Live Without". Water Pollution Control Systems are highly regulated by both State and Federal laws. The operators that maintain our collection and treatment systems are professionals that are well trained and educated to maintain and operate our facilities. Our systems require continu ous operation 24 hours a day, 7 days a week, every day of the year. In 1969, the State of North Carolina passed laws requiring operator certifi cation. Our Collection System Opera tors and Biological Water Pollution Control System Operators are respon sible for managing and controlling our network of pipes and treatment processes. Operators can obtain four levels of certification in each of these categories with Grade 4 being the high est. Eligible applicants for certification must possess at least a high school diploma or a GED and be at least 18 years of age. In addition, they must meet experience requirements, com plete several hours of classroom train ing, and pass the exam. cz o CZ) - and Q S % H- a. a- □ in LU 4 w .■= fv 5 rv •3 £ 5 fl fl 0) i o> fl s fl o CXC LXJ I— LXJ F- GH <1 z o -I 5 inID U nt. 8ID r* rv IDII