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Home My WebLink AboutNC0023337_Historical_2022TOWN OF SCOTLAND NECK P.O. Box 537 1310 MAIN STREET SCOTLAND NECK, NC 27874 July 18, 2022 Vanessa E. Manuel Assistant Regional Supervisor Water Quality Regional Operations Section Raleigh Regional Office Division of Water Resources, NCDEQ Dear Mrs. Manuel, 1VC Dept OfEnvironmLmtal Quality A061 2022 Raleigh Regional OXCO Subject: Compliance Evaluation Inspection Scotland Neck WWTP NPDES Permit No. NCO023337 Halifax County I am writing in response to the Compliance Evaluation Inspection Report received by the Town of Scotland Neck and dated June 10, 2022. 1 would like to address the bolded issues that were pointed out by the inspector. The Town of Scotland Neck has been awarded two grants (Phase 5 & Phase 6) totaling $2,000,000.00. The grants call for repair/replacement of much of the headworks, including the step screen and grit removal system. In the mean time we have a manual bar screen that is being used and is monitored and cleaned multiple times daily. These grants also provide for two (2) new brush rotor assemblies and additional jet pumps in the digester to help with the vegetation growth that was noted. The Phase 6 grant also includes repairing and/or replacing the tertiary filter pumps and media. I would also like to note that the Town Board has approved the purchase of a new replacement rotor which is due to be received and installed around the end of September of 2022. The total cost of the brush rotor, including installation, is $112,000.00. Engineering Services, who is handling the grant for the Town, has informed me that the Phase 5 Project should be under construction during the first three quarters of 2023. The Phase 6 Project will be under construction from the third quarter of 2023 to the second quarter of 2024. Sin erely, ddie raxton, Mayor Town of Scotland Neck r.., �� \... �' �,.. ,. z , DocuSign Envelope ID: 69359C81-C4AF47D6-8B70-1C68556D7CBB ROY COOPER Governor ELIZABETH S. BISER Serrerary RICHARD E. ROGERS, JR. Director Eddie Braxton Town of Scotland Neck P.O. Box 537 Scotland Neck, NC 27874-0537 Dear Mr. Braxton: NORTH —ARVLINA Environmen Pal Quality June 10, 2022 Subject: Compliance Evaluation Inspection Scotland Neck WWTP NPDES Permit No. NCO023337 Halifax County On May 5, 2022, Alys Hannum of the Raleigh Regional Office (RRO) conducted a compliance evaluation inspection of the treatment facilities located at the Scotland Neck Wastewater Treatment Plant (WWTP). The purpose of this inspection was to ensure compliance with the subject National Pollutant Discharge Elimination System (NPDES) permit. The presence and cooperation of Claude Parks Boyd, Operator in Responsible Charge (ORC), during the inspection was helpful and appreciated. The Scotland Neck WWTP is located off NC Hwy 258 South in Scotland Neck, North Carolina. The closest address is 7232 NC Hwy 258 South. The facility is a class WW-3 wastewater treatment plant that treats domestic wastewater. This NPDES compliance evaluation inspection consisted of the following: • Review of the NPDES permit; • Review of the owner/facility information; • Review of the previous 12 months compliance history; • Comparison of eDMR data against lab documents; • On -site review of log books, calibration, and inspection logs; • On -site inspection of the wastewater treatment units; and On -site inspection of the discharge outfall. Findings during the pre -inspection file review were as follows: 1. Through NPDES permit NC0023337, the Town of Scotland Neck (Town) is authorized to discharge treated wastewater from the Scotland Neck WWTP to receiving waters designated as Canal Creek in the Tar -Pamlico River Basin. The NPDES permit was issued effective July 1, 2021 and expires October 31, 2024. l —D �� North Carolina Department of Environmental Quality 1 Dwision of Water Resotn Ces Raleigh Regional Office 3800 &[nett Drive I Raleigh. North Carolina 27609 919.791.4200 DowSign Envelope ID: 69359C81-C4AF-47D6-8B70-1C68556D7CB8 Compliance Evaluation Inspection Scotland Neck WWTP NPDES Permit. No. NCO023337 Page 2 of 3 2. As listed in the subject permit, the treatment components include: a mechanical and manual bar screen, a grit auger, an oxidation ditch, an anoxic section in the outer ring of a former oxidation ditch, two (2) clarifiers, two (2) tertiary filters, a chlorine contact chamber and de -chlorination chamber, an aerobic sludge digester, and post aeration. 3. For the review period May 2021 — April 2022, the Town reported: one violation of the NPDES permit's effluent limits for Weekly Average Nitrogen Ammonia which resulted in a Notice of Deficiency (NOD); one failure of the aquatic toxicity permit limits which resulted in a Notice of Violation (NOV), and two monitoring violations which resulted in an NOD and NOV. 4. From May 2017 to April 2022, six penalty assessments have been issued. There are no outstanding penalties. Findings during the inspection were as follows: 1. The operator's log and supporting analytical documentation were consistent and up to date. 2. The inspector compared the February, April, and August 2021 DMR data against lab bench data. No discrepancies were noted. 3. The inspector noted the following observations of the treatment components: a. Primary Treatment: The facility's bar screen was bent at the time of the inspection and was not operating correctly. The grit chamber has been inoperable and bypassed since approximately 2017, according to facility staff and previous inspection reports. b. Oxidation Ditch: One of two aerators was inoperable. This issue was noted on the 2020 inspection report as well. Facility staff provided a copy of the proposal to replace this rotor aerator, approved April 141h, 2022. c. Secondary Clarifiers: One of the two clarifiers was operational at the time of the inspection. Little to no pin floc was observed within the unit. The depth of the first secondary clarifier is 10 feet, and the depth of the sludge at the time of inspection was 0.1 feet. The other secondary clarifier is currently used for sludge storage and thickening. According to plant staff, a grant has been approved to add a new clarifier to the plant which would operate as intended. d. BNR Anoxic Section: The plant currently uses a portion of their former oxidation ditch as an anoxic zone. There was visible vegetation growing on the water's surface. e. Filtration: The tertiary sand filters were inoperable. f. Disinfection. The facility disinfects the treated wastewater prior to discharge using sodium hypochlorite, followed by a chlorine contact chamber and then chemical de -chlorination. North Carolina Department of Envi,onmental Quality i Division of Water Resources D_E Q 7> Ralelgh Regional Office 13800 Barren Delve 1Zalei9h, North Carolina 27e09 u..r,:«•'le .aa.iN e` 41979I.4200 DowSign Envelope ID: 69359C81-C4AF-47D6-8B7o-1C68556D7CBB Compliance Evaluation Inspection Scotland Neck W WTP NPDES Permit. No. NC0023337 Page 3 of 3 All the above issues were also noted on an internal "Plant Evaluation" report which facility staff provided to the inspector, and which is attached for reference. Within sixty (60) days of receipt of this letter, please provide this office with a written report detailing what actions have been or will be taken to resolve the bolded issues above. 4. Flow measurement is measured instantaneously with a flow meter. The permitted flow limit is 0.675 MGD. The flow meter was last calibrated in June, 2021. No issues were observed. 5. Chemicals are stored safely and with the appropriate hazard notifications and signage. 6. The effluent discharge via the outfall pipe was observed to be clear with no observable solids or foam. No detrimental impacts to the receiving tributary were observed. Within sixty (60) days of receipt of this letter, please provide this office with a written report detailing what actions have been or will be taken to resolve the issues noted above. If you have questions or comments about the inspection, this report, or the requirements to take corrective action, please contact Alys Hannum at alys.hannumAncdenr.gov, or by phone at 919- 791-4255. Sincerely, CDocuSigned by: �/aua t,SSa f, nWA41 82916E6AB32144F... Vanessa E. Manuel, Assistant Regional Supervisor Water Quality Regional Operations Section Raleigh Regional Office Division of Water Resources, NCDEQ Attachments: EPA Water Compliance Inspection Report "Plant Evaluation" — March 4, 2020 cc: RRO Files H Laserfiche John Poteat, ORC (poteat2na aol.com) D_EQ�� Not thCarolina DepaiirnentofEnvironmental QualUi, I DivlslonofWolerResoumes Raleigh Regional0frice 138008arrett Drive Raleigh, North Carolina 27n09 wne�wa iawn� 911)N1.4200 DocuSign Envelope ID: 69359C81-C4AF47D6-8870-1C68556D7CBB United States Environmemal Protection Agency Form Approved. EPA Washington, D C 20460 OMB No. 2040-0057 Water Compliance Inspection Report Approval expires 8-31-98 Section A: National Data System Coding (i.e., PCs) Transaction Code NPDES yr/mo/day Inspection Type Inspector Fac Type 1 IN I 2 15 I 3 I NCO023337 111 12 22/04/05 17 18 I (j 191 p I 201 21111111 111111111 11 1111111 1 1 11111 11111111111 f6 Inspection Work Days Facility Self -Monitoring Evaluation Rating B1 CIA Reserved -- 72 Lv 73174 7 I I I 80 67I Ut 70Ll 71 L_j Section B: Faclity Data Name and Location of Facility Inspected (For Industrial Users discharging to POTW, also nclude Entry Time/Date Permit Effective Date POTW name and NPDES permit Number) 01:OOPM 22/04/05 21/07/01 Scotland Neck WWFP NC Hwy 258 S Exit Time/Date Permit Expiration Date Scotland Neck NC 27874 03:o0PM 22/04/05 24/10/31 Name(s) of Onsite Representafive(s)Rdes(s)/Phone and Fax Number(s) Other Facility Data /// Claude Parks Boyd/ORC/252-826-3152/ Name, Address of Responsible OfficialTBe/Phone and Fax Number Contacted Eddie Braxton,PO Box 537 Scotland Neck NC 278740537/Mayor/252-826-3152/ No Section C: Areas Evaluated During Inspection (Check only those areas evaluated) Permit E Flow Measurement Operations & Maintenaf Records/Reports Self -Monitoring Progran 0 Sludge Handling Dispoe Facility Site Review EffluentlReceiving Wate Laboratory Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) (See attachment summary) Name(s) and Signature(s) of Inspector(s) Agency/Office/Phone and Fax Numbers Date Alys K Hannum oncgsigned by: DWR/RRO WQ/919-791-4255/ 6/9/2022 �nsuruy�.r. aCui7ocSAnaF3_ Signature of Management Q A Reviewer Agency/Office/Phone and Fax Numbers Date Docultigned by: 6/9/2022 EPA oiffiFtf;v 9-94) Previous editions are obsolete. Page# DocuSign Envelope ID: 69359C81-C4AF-47D6-8B7D-1C68556D7CBB NPDES yr/molday Inspection Type I NCO023337 j 1 22/04105 17 18 I C I Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) Page# DocuSign Envelope ID: 69359C81-C4AF-47D6-8B70-1 C6855607CBS Permit: NCO023337 Owner - Facility: Scotland Neck yW TP Inspection Date: 04/06/2022 Inspeetlon Type: Compliance Evaluation Permit Yes No NA NE (If the present permit expires in 6 months or less). Has the permittee submitted a new ❑ ❑ ■ ❑ application? Is the facility as described in the permit? ■ ❑ ❑ ❑ # Are there any special conditions for the permit? ❑ ■ ❑ ❑ Is access to the plant site restricted to the general public? ■ ❑ ❑ ❑ Is the inspector granted access to all areas for inspection? ■ ❑ ❑ ❑ Comment: Operations & Maintenance Yes No NA NE Is the plant generally clean with acceptable housekeeping? ■ ❑ ❑ ❑ Does the facility analyze process control parameters, for ex: MLSS, MCRT, Settleable ■ ❑ ❑ ❑ Solids, pH, DO, Sludge Judge, and other that are applicable? Comment: Bar Screens Yes No NA NE Type of bar screen a.Manual ■ b.Mechanical ■ Are the bars adequately screening debris? ❑ ■ ❑ ❑ Is the screen free of excessive debris? ■ ❑ ❑ ❑ Is disposal of screening in compliance? ■ ❑ ❑ ❑ Is the unit in good condition? ❑ ■ ❑ ❑ Comment: Bar Screen is bent in the middle Grit Removal Yes No NA NE Type of grit removal a.Manual ■ b.Mechanical ■ Is the grit free of excessive organic matter? ❑ ■ ❑ ❑ Is the grit free of excessive odor? ❑ ❑ ■ ❑ # Is disposal of grit in compliance? ❑ ❑ ■ ❑ Comment: Grit chamber has been out of commission since at least the Previous inspection, according to facility staff. Page# 3 DocuSign Envelope ID: 69359C81-C4AF-47D6-8B70-1C68556D7CBB Pemdt: NCO023337 Inspection Date: 04/05/2022 Secondary Clarifier Is the clarifier free of black and odorous wastewater? Owner -Facility: Scotland Neck WWiP Inspection Type: Compliance Evaluation Is the site free of excessive buildup of solids in center well of circular clarifier? Are weirs level? Is the site free of weir blockage? Is the site free of evidence of short-circuiting? Is scum removal adequate? Is the site free of excessive floating sludge? Is the drive unit operational? Is the return rate acceptable (low turbulence)? Is the overflow clear of excessive solids/pin floc? Is the sludge blanket level acceptable? (Approximately '/. of the sidewall depth) Yes No NA NE ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ Comment: Clarifier #1 10 feet deep. 0.1 feet sludge // Clarifier #2: 10 feet deep (smaller circumference) 3 feet sludge Smaller clarifier is used more for sludge thickening and storage rather than a fully functional clarifier. Oxidation Ditches Yes No NA NE Are the aerators operational? ❑ M ❑ ❑ Are the aerators free of excessive solids build up? ■ ❑ ❑ ❑ # Is the foam the proper color for the treatment process? ■ ❑ ❑ ❑ Does the foam cover less than 25% of the basin's surface? ■ ❑ ❑ ❑ Is the DO level acceptable? ❑ ❑ ❑ ■ Are settleometer results acceptable (> 30 minutes)? ❑ ❑ ❑ ■ Is the DO level acceptable?(1.0 to 3.0 mg/1) ❑ ❑ ❑ ■ Are settelometer results acceptable?(400 to 800 ml/I in 30 minutes) ❑ ❑ ❑ ■ Comment: Only one of the two brush aerators is functional Nutrient Removal Yes No NA NE # Is total nitrogen removal required? ❑ ❑ ❑ ❑ # Is total phosphorous removal required? ❑ ❑ ❑ ❑ Type Biological # Is chemical feed required to sustain process? ❑ ❑ ❑ ❑ Is nutrient removal process operating properly? ❑ ❑ ❑ ❑ Comment: Note Facility has a BNR anoxic section in the outer ring of their former oxidation ditch. Ditch does not mix well& some vegetation growing on the surface. Page# 4 DowSign Envelope ID: 69359C81-C4AF-47D6-8B70-1C6855607CBB Permit: NC0023337 Inspection Date: 04/05/2022 Owner-Faclllty: Scotland Neck WWTP Inspection Type: Compliance Evaluation Chemical Feed Yes No NA NE Is containment adequate? ■ ❑ ❑ ❑ Is storage adequate? ■ ❑ ❑ ❑ Are backup pumps available? ■ ❑ ❑ ❑ Is the site free of excessive leaking? ■ ❑ ❑ ❑ Comment: Aerobic Digester Yes No NA NE Is the capacity adequate? ■ ❑ ❑ ❑ Is the mixing adequate? ■ ❑ ❑ ❑ Is the site free of excessive foaming in the tank? ■ ❑ ❑ ❑ # Is the odor acceptable? ■ ❑ ❑ ❑ # Is tankage available for properly waste sludge? 0 ❑ ❑ ❑ Comment Filtration (High Rate Tertiary) Yes No NA NE Type of operation: Is the filter media present? ■ ❑ ❑ ❑ Is the filter surface free of clogging? ■ ❑ ❑ ❑ Is the filter free of growth? ■ ❑ ❑ ❑ Is the air scour operational? ■ ❑ ❑ ❑ Is the scouring acceptable? ❑ ❑ ❑ ■ Is the clear well free of excessive solids and filter media? ■ ❑ ❑ ❑ Comment: Disinfection -Liquid Yes No NA NE Is there adequate reserve supply of disinfectant? ■ ❑ ❑ ❑ (Sodium Hypochlorite) Is pump feed system operational? ■ ❑ ❑ ❑ Is bulk storage tank containment area adequate? (free of leaks/open drains) ■ ❑ ❑ ❑ Is the level of chlorine residual acceptable? ■ ❑ ❑ ❑ Is the contact chamber free of growth, or sludge buildup? ■ ❑ ❑ ❑ Is there chlorine residual prior to de -chlorination? ❑ ❑ ❑ ■ Comment: Page# 5 DocuSign Envelope ID: 69359C81-C4AF-4706-8B70-1C68556D7CBB Permit: NCO023337 (Tuner - Facility: Inspection Date: 04/05/2022 Inspection Type: Scotland Neck WWiP Compliance Evaluation De -chlorination Yes No NA NE Type of system ? Liquid Is the feed ratio proportional to chlorine amount (1 to 1)? ■ ❑ ❑ ❑ Is storage appropriate for cylinders? ■ ❑ ❑ ❑ # Is de -chlorination substance stored away from chlorine containers? ■ ❑ ❑ ❑ Comment: Are the tablets the proper size and type? ❑ ❑ ■ ❑ Are tablet de -chlorinators operational? ❑ ❑ ■ ❑ Number of tubes in use? 0 teC'7'r1Prtnil Effluent Pipe Yes No NA NE Is right of way to the outfall properly maintained? ■ ❑ ❑ ❑ Are the receiving water free of foam other than trace amounts and other debris? ■ ❑ ❑ ❑ If effluent (diffuser pipes are required) are they operating properly? ❑ ❑ ■ ❑ Comment: Laboratory Yes No NA NE Are field parameters performed by certified personnel or laboratory? ■ ❑ ❑ ❑ Are all other parameters(excluding field parameters) performed by a certified lab? ■ ❑ ❑ ❑ # Is the facility using a contract lab? ■ ❑ ❑ ❑ # Is proper temperature set for sample storage (kept at less than or equal to 6.0 ■ ❑ ❑ ❑ degrees Celsius)? Incubator (Fecal Coliform) set to 44.5 degrees Celsius+/- 0.2 degrees? ❑ ❑ ■ ❑ Incubator (BOD) set to 20.0 degrees Celsius +/- 1.0 degrees? ❑ ❑ ■ ❑ Page# 6 DocuSign Envelope ID. 69359C81-C4AF-47D6-8B70-1C68556D7CBB Town of Scotland Neck NPDES NCDO23337 Plant Evaluation March 4, 2020 On February 1, 2020, the Town of Scotland Neck resumed operation of the Wastewater Treatment Plant (WWTP). The Town's staff encountered several challenges with the operation of the facility along with permit non-compliance issues. The Town requested assistance from NC Rural Water Association in evaluating the facilities. A cursory review of the W WTP was done on March 2n° and 3r°. The following comments and observations are a result of this review: Preliminary Treatment Bar Screen One of the bars at the bottom of the screen is broken and pulled out of the water flow. Several of the other bars are pushed to the side. This creates a hole in the screen that will allow a significant amount of debris to pass by the screen and enter the flow channel and impact downstream processes. The bars should be repaired. The drainpipe for the screenings auger is disconnected. This allows wastewater to flow on the ground. Grit Removal The grit removal system consists of two grit pumps and a grit classifier. All these units are out of service. Grit is removed from the wastewater to prevent accumulation in downstream basins and to prevent excessive wear on pumps. To accomplish grit removal, the flow needs to slowed to approximately 1 fps to allow heavier grit to settle out. It appears that the existing grit removal system will not effectively remove grit even if all components were operational. The grit system is the old original grit chamber that had a flight and chain to move settled grit to a sump. The flight and chain were removed, the chamber was cut in to just downstream of the grit sump to install a line to the newer influent pump station. The suction for the two grit pumps are in this sump. 1t is not expected that significant grit removal will be accomplished by gravity settling of grit into this sump. Influent Pump Station There are three influent pumps in the influent pump station. One of the pumps is out -of -service at this time. Operational controls of the pumps were not evaluated. Chemical Feed System A caustic feed system is set up inside the influent pump station to provide pH adjustment as needed. There is one chemical feed pump which sets on top of the control panel for the influent pumps. If this pump or the tubing going to/from the pump fails, caustic could enter the control panel (door does not DowSign Envelope ID: 69359C81-C4AF-47D6-8B70.1C68556D7CBB seal properly) and cause electrical failure of the influent pumps. Additionally, placement of the pump is a safety hazard The storage tank for the 25%caustic is inside the influent pump station building. It appears that fumes/spills from this tank has caused deterioration of the building and could possibly cause premature failure of electrical components. Biological Treatment Process Oxidation Ditch The oxidation ditch has two brush aerators to provide mixing and dissolved oxygen (DO) to the biological system. The operation of the aerators 6 essential to the successful operation of the biological treatment system. One of the aerators is out -of -service and will have negative impacts on plant operations During the evaluation period, the DO levels in the oxidation ditch were significantly less than the recommended DO levels for proper treatment. The oxidation ditch is approximately four feet deep with sloped sides. Information was not readily available to determine the volume or dimensions of the oxidation ditch. The ditch was probed from each side in an effort to determine the amount of grit/sludge accumulation in the bottom of the oxidation ditch. Two locations had a "sludge bank" in which the debris was nearly to the top of the water level and extended for 6+ feet. Several locations had accumulations of 2 -3 feet. When the debris was probed, a significant release of hydrogen sulfide gas was released. The production and release of hydrogen sulfide in the ditch can cause a drop in pH. The debris accumulation in the ditch also reduces the amount of detention time for biological treatment and could negatively affect compliance. Secondary Clarifiers There are two secondary clarifiers: Clarifier #1— the larger peripheral feed clarifier, and; Clarifier #2 — the smaller center feed clarifier. The purpose of the clarifiers is to allow the biological floc to settle to the bottom and a clarified effluent to flow over the top into the weirs and then to filtration. The settled sludge is returned to the oxidation ditch. Clarifier #2 was not in service during the evaluation because the Return Activated Sludge (RAS) pump was inoperable. The clarifier was cut on briefly and it does appear to be operational. The caulking at weirs is coming out and the concrete is showing signs of erosion. Clarifier #1 was in operation during the evaluation. The clarifier appears to have been modified by installing a small pump in the scum pit for return sludge pumping. This may have been necessitated by the failure of the RAS pumps in the Return Sludge Pump Station. The purpose of the RAS pump is to remove the settled sludge/bacteria from the clarifier and return to the oxidation ditch. Insufficient RAS pumping can cause a high sludge blanket to develop in the clarifier and possible overflow of the blanket DocuSign Envelope ID: 69359C81-C4AF-47D6-8B70-1C68556D7CBB to the following treatment processes. During the evaluation, the pump was insufficient to maintain a low sludge blanket in the clarifier. The aerator in the oxidation ditch was having to be cut off to reduce the solids going to the clarifier and allow the return pump to catch up. Excessive debris has accumulated between the outside wall and the influent baffle on Clarifier #1. The baffle wall is somewhat deflected at this area, possibly due to this buildup. Return Sludge Pumo Station This pump station not only serves as the RAS pump station but also directs different Flows (wastewater and sludge) to different locations around the plant site. The pumps in the pump station were inoperable. Clarifier #2 can not properly operate with this station out -of -service which increases the hydraulic and sludge loading on Clarifier #1. The Foss of this station impacts wasting of excess sludge and other areas of wastewater operation. Filter Pump Station This pump station takes effluent flow from the clarifiers and pumps it to the sand filters. A failure of this system could cause a spill. There are two pumps in this station. Pump #1 is out -of -service. The door closure to the pump control panel is broken and will not latch. This will allow Insects to enter and possibly cause problems. There is also a strong hydrogen sulfide odor in the pump station. This gas is corrosive and could damage electrical and mechanical components. Advanced Treatment Sand Filters Sand filters provide enhanced treatment by both physical and biological process. There are two sand filters. #Z sand filter is out -of -service and #1 sand filter can only me operated in manual mode. Necessary repairs and programming should be made to place :he filters in automatic operation. The operation of the sand filters is also hampered by the lack of room in the digestor for storage of the filter backwash. Disinfection Chlorination/Dechlori nation Chlorination is accomplished by adding sodium hypochlorite to the wastewater flow prior to the chlorine contact chamber. The dosage is dependent on several factors, including: quality of wastewater, temperature, pH, detention time, etc. The chlorine contact chambers had an accumulation of sludge in the bottom of the basin of 12+ inches. This accumulation can impact disinfection. The state generally wants the chlorine contact chamber when the sludge accumulation reaches six inches. The chamber was dye tested to determine actual detention time. The chamber is designed for a detention DowSign Envelope ID. 69359C81-C4AF-47D6-8B70-1C68556D7CBB time of 30 minutes at design flow. The detention time was approximately 20 minutes at one-half the design Flow. Disinfection is a critical process and it is recommended that there be spare pumps and parts for both the chlorination and dichlorination pumps. Sampling Sampler The permit requires effluent sampling to be flow proportional. This requirement is not enforced equally among the seven NC DWR Regional Offices and has not been enforced at this facility. The samples are time composited. Each discrete sample taken is required to be a minimum of 100 mi. Sample volume and number of samples taken in a 24-hour period should be adjusted to achieve the 100 ml sample volume and the minimum amount of composite sample volume needed for testing. Sludge Handling Dieestor The sludge digester was completely filled at the time of the evaluation. Plant staff had cut off the aeration system to allow the sludge to settle and to decant clear water from the top, but the sludge was too thick. Every biological wastewater treatment plant creates new sludge/bacteria at all times. A successful operation requires the excess sludge to wasted out of the system on a regular basis. With the full digester, the staff can not remove the extra sludge and the failure to do so is having negative impacts on plant operation and compliance. Operations Major Issues At the time of the evaluation, there were several operational issues occurring that were detrimental to proper operations and compliance. The major contributory factor is the inability to waste excessive sludge from the system. This failure affects the oxidation ditch, clarifiers, filters and disinfection. Some (but not all) of the issues are: • High MLSS — normal range for MLSS concentration is 2,500— 3,500 mg/L. Lab data from January 2020 shows the MLSS concentration to have been in the 9,000 — 9,000 mg/L range. Most recently, due to minimum wasting, the MLSS was approximately 6,000 mg/L. • DO in Oxidation Ditch — bacteria growing in the oxidation ditch require minimum DO levels for respiration. The normally accepted DO level for proper operation is approximately 2.0 mg/L. DocuSign Envelope ID'. 69359C81-C4AF-47D6-8B70-1 C68556D7CBB The DO in the ditch has been in the 0.4 mg/L range. This low number affects bacterial health, thereby affecting BOD , Ammonia Nitrogen, TSS and TP redu tion. The minimum DO level is not being achieved because: The aerators can not be run continuously due to the high MLSS concentrations overwhelming the clarifiers and because one of the aerators in inoperable. • Return Sludge Pump Station — The failure of this station prevents #2 clarifier from being put in service, which puts a strain on the #1 clarifier. • #1 Clarifier Return Pump — a combination of high MLSS and the low pumping capacity of the return sludge pump causes the sludge blanket in the clarifier to rise and to get excessively thick. Reducing the MLSS, increasing the capacity of this pump and/or returning the RAS Pump Station to service are needed. • Digestor—immediate sludge removal from the digestor is needed. The sludge can be land applied as a liquid or a dewatering box or other oewatering device can be used to remove the sludge from the facility. Anoxic Zone The anoxic zone at the digestor does not appear to have been used recently. The anoxic zone is designed to reduce the total nitrogen content of the wastewater. If the facility is not meeting their Total Nitrogen limits as required by the Tar -Pamlico River Association, then this process should be placed in service. Process Control To properly operate the WWTP and maintain the optimal operating environment, staff needs to evaluate and document plant activities. • MLSS meter • Microscope • Computer • Various process test modules for the spectrophotometer Miscellaneous This evaluation reviewed the most serious of the mechanical and operational issues that were apparent during a quick review of the facilities. During the evaluation, several safety deficiencies and possible OSHA violations were observed. In addition to the major mechanical and equipment failures, there were a number of minor maintenance issues that have not been addressed that could result in larger problems if not addressed. NPDES Permit NCOU2333"/ STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY DIVISION OF WATER RESOURCES PERMIT TO DISCHARGE WASTEWATER UNDER THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM 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, the Town of Scotland Neck is hereby authorized to discharge wastewater from a facility located at the Scotland Neck WWTP US Highway 258, South of Scotland Neck Halifax County to receiving waters designated as Canal Creek in the Tar Pamlico 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 July 1, 2021 This pen -nit and authorization to discharge shall expire at midnight on October 31, 2024. Signed this day May 25, 2021 DocuSigned by: 8328B44CE9EB4A1... S. Daniel Smith, Director Division of Water Resources By Authority of the Environmental Management Commission Page 1 of 10 NPU&J Permit NCOU2333'/ SUPPLEMENT TO PERMIT COVER SHEET All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby revoked. As of this pen -nit issuance, any previously issued permit bearing this number is no longer effective. Therefore, the exclusive authority to operate and discharge from this facility arises under the permit conditions, requirements, terms, and provisions included herein. Town of Scotland Neck is hereby authorized to: 1. continue to operate an existing 0.675 MGD wastewater treatment plant consisting of the following: • mechanical bar screen/manual bar screen backup • grit auger • parshall flume • one oxidation ditch • BNR anoxic section in outer ring of former oxidation ditch • dual clarifiers • aerobic sludge digester • dual tertiary filters • chlorine disinfection/dechlorination • post aeration • backup generator located at Scotland Neck WWTP, US Highway 258, south of Scotland Neck in Halifax County, after submitting an Engineers Certification documenting that facilities are completed and operating in accordance with Authorization to Construct (ATC) No. 023337A06, operate a modified 0.675 MGD wastewater treatment plant consisting of the following: • mechanical bar screen/manual bar screen backup • grit auger • Parshall flume • one oxidation ditch • BNR anoxic section in outer ring of former oxidation ditch • two (2) secondary clarifiers • sludge thickener • aerobic sludge digester • dual tertiary filters • chlorine disinfection/dechlorination • post aeration • backup generator 3. operate facilities for land application disposal of up to 0.048 MGD of reclaim water in accordance with Non -Discharge Permit WQ0022697; and 4. discharge wastewater from said treatment works at the location specified on the attached map into Canal Creek [Stream Index: 28-79-32-I] currently classified C;NSW waters in sub -basin 03-03-04 [HUC: 030201020604] of the Tar Pamlico River Basin. Page 2 of 10 NPLIES Permit NC:UU23337 PART A. (L) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [ 15A NCAC 02B .0400 et seq., 02B .0500 et seq.] Grade III Biological Water Pollution Control System [15A NCAC 08G .0302] During the period beginning on the effective date of this pennit and lasting until expiration, the pennittee is authorized to discharge from outfall 001. Such discharges shall be limited and monitored[ by the Pennittee as specified below: EFFLUENT CHARACTERISTICS Parameter Code LIMITS MONITORING RE UIREMENTS Monthly Average Weekly Average Daily Maximum Measurement Frequency Sample Type Sample Location2 Flow 50050 0.675 MGD Continuous Recording I or E BOD, 5-day, 20' C 3 -Summer* C0310 5.0 mg/L 7.5 mg/L 3/Week Composite E,I BOD, 5-day, 20' C ;-lVinter* C0310 10.0 mg/L 15.0 mg/L 3/Weck Composite E,1 Total Suspended Solids (TSS) 3 C0530 30.0 mg/L 45.0 mg/L 3'Week Composite E,I NH3 as N -Summer* C'0610 2.0 mg/L 6.0 mg%L 3/Weck Composite E NHi as N-lfinter* C0610 4.0 mg/L 12.0 mg/L I 3/\Veek Composite E Fecal Coliform (geometric meat) 37616 200 100 in 400/100ml 3/Week Grab E Dissolved Oxygen 00300 Daily average not <6.0 mg/L 3/Week Grab E Total Residual Chlorine (TRC) 4 50060 1 1 17 µg/L 3/Week Grab E Temperature ("C) (10010 Monitor & Report Daily Grab E Total Nitrogen (mg/L) C0600 Monitor & Report Weekly Composite E 5 TN Load' QM600 Qi'600 Monitor & Report 9,626 lbs/year 6 Monthly Annually Calculated Calculated E Total Phosphorus (mg/L) C0665 Monitor & Report Weekly Composite li TPLoad 5 QM665 QY665 Monitor & Report 1,740 lbs/year 6 Monthly Annually Calculated Calculated E Chronic Toxicity 7 TGP3B See Footnote 7 Quarterly Composite E Total Copper 8 01042 10.56 µg/1-8 14.46 µg/L8 Quarterly Composite E Total Zinc 01092 Monitor & Report Quarterly Composite E Total Hardness 00900 Monitor & Report Quarterly Composite E Total Mercury 9 COMER Monitor & Report 9 I/Cycle 9 Grab E pH 00400 6.0 -9.0 standard units 3/Week Grab E Dissolved Oxygen 00300 Monitor & Report Variable 10 Grab U, D Temperature ("C) 00010 Monitor & Report Variable 10 Grab U, D *Summer: April I - October 31 * {{'inter: November I - March 31 Footnotes 1. The Permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application system. See Special Condition A.(7.). 2. Sample locations: E-Effluent, 1-Influent, U-Upstream at least 50 feet, D-Downstream at least 900 feet. 3. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15 percent of the respective monthly average influent value (85% removal). 4. TRC monitoring and effluent limitations apply only if chlorine is used as a disinfectant or elsewhere in the process. The facility shall report all effluent TRC values reported by a NC certified laboratory, including field certified. However, effluent values below 50 ug/ L will be treated as zero for compliance purposes. Page 3 of 10 NPUE: i Permit NC1/U2333/ 5. TN or TP Load is the mass quantity of Total Nitrogen or Total Phosphorus discharged in a given period of time. See Special Condition A.(4.) Calculation of TN or TP Loads. 6. Compliance with mass limits shall be determined in accordance with Special Condition A.(4.) Annual Limits for Total Nitrogen or Total Phosphorus. 7. Chronic Toxicity (Ceriodaphnia dubia), limited, P/F at 90%: February, May, August, and November [see Special condition A.(3.)]. 8. Effluent hardness sampling should be performed in conjunction with sampling for hardness dependent metals (Copper). 9. Based on the completion and approval of the N.C. Statewide mercury total Maximum Daily Load (TMDL), the permit now requires one mercury analysis, using EPA Method 1631 E, which must be completed within the twelve (12) months prior to the next permit renewal. This requirement is included on the effluent page and in the new Special Condition A.(8.). 10. Stream samples shall be collected 3/Week during June -September and 1 /Week during the remaining months of the year. Upon initiation of instream sampling by the Tar Pamlico River Basin Association, instream monitoring required by this permit is provisionally waived in light of the permittee's participation in the Association. Instream monitoring will be immediately reinstated should the permitter end its participation in the Association. Conditions: • There shall be no discharge of floating solids or visible foam in other than trace amounts. A. (2.) SCHEDULE OF COMPLIANCE (OUTFALL 001) [G.S. 143-215.1(b)] 1. Within one year from the effective day of the pennit the Permittee shall submit to the Division of Water Resources a Corrective Action Plan summarizing the actions to be taken to achieve compliance with Total Copper limits at Outfall 001 and a schedule of activities to implement the Plan. 2. Within two years from the effective date of the permit submit a report to the Division summarizing actions taken in accordance with the Corrective Action Plan. 3. Within three years from the effective date of the permit submit a report to the Division summarizing actions taken in accordance with the Corrective Action Plan. 4. Within four years from the effective date of the permit submit a report to the Division summarizing actions taken in accordance with the Corrective Action Plan. 5. Achieve compliance with Total Copper limits specified in Section A. (2) by October 31, 2024. Upon approval of the Corrective Action Plan by the Division, the report and actions become an enforceable part of this permit. Any modifications to the schedule shall be requested to the Division at least ninety (90) days before the deadline. Modifications to the schedule in excess of four months will be subject to public notice. Page 4 of 10 NPDES Permit NC0023337 A. (3.) CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY) [ I SA NCAC 02B .0200] 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, guarterly monitoring using test procedures outlined in the "North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," (Revised December 2010, or subsequent versions) or "North Carolina Phase 11 Chronic Whole Effluent Toxicity Test Procedure" (Revised December 2010, or subsequent versions). The tests will be perforated during the months of February, May, August, and November. These months signify the first month of each three-month toxicity testing quarter assigned to the facility. Effluent sampling for this testing must be obtained during representative effluent discharge and 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 11 Chronic Whole Effluent Toxicity Test Procedure" (Revised -December 2010, or subsequent versions). All toxicity testing results required as part of this permit condition will be entered electronically using the Division's eDMR system 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, DWR Form AT-3 (original) is to be sent to the following address: North Carolina Division of Water Resources Water Sciences Section/Aquatic Toxicology Branch 1621 Mail Service Center Raleigh, NC 27699-1621 Or, results can be sent to the email, ATForms.ATB<runcdenr.gov Completed Aquatic Toxicity Test Forms shall be filed with the Water 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 clilorine 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 Water 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. Assessment of toxicity compliance is based on the toxicity testing quarter, which is the three-month time interval that begins on the first day of the month in which toxicity testing is required by this permit and continues until the final day of the third month. Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Water Resources indicate potential impacts to the receiving stream, this permit may be re -opened and modified to include alternate monitoring requirements or limits. NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism survival, minimum control organism reproduction, and appropriate environmental controls, shall constitute an invalid test and will require immediate follow-up testing to be completed no later than the last day of the month following the month of the initial monitoring. Page 5 of 10 NPDES Permit NCO02333 / A.(4.) CALCULATION OF TOTAL NITROGEN AND TOTAL PHOSPHORUS LOADS [G.S.143-215.1(b)] (a.) The Permittee shall calculate monthly and annual TN Loads as follows: (i.) Monthly TN (or TP) Load (lb/mo) = TN (or TP) x TMF x 8.34 where: TN or TP = the average Total Nitrogen or Total Phosphorus concentration (mg/L) of the composite samples collected during the month TMF = the Total Monthly Now of wastewater discharged during the month (MG/mo) 8.34 = conversion factor, from (mg/L x MG) to pounds (ii.) Annual TN (or TP) Load (lb/yr) = Sum of the 12 Monthly TN (or TP) Loads for the calendar year (b.) The Permittee shall report monthly Total Nitrogen and Total Phosphorus results (mg/L and lb/mo) in the appropriate discharge monitoring report for each month and shall report each calendar year's results (lb/yr) with the December report for that year. A.(5.) ANNUAL LIMITS FOR TOTAL NITROGEN OR TOTAL PHOSPHORUS [G.S. 143-215.1(b)] (a.) Total Nitrogen (TN) and Total Phosphorus (TP) allocations and load limits for NPDES dischargers in the Tar -Pamlico River basin are annual limits and apply on a calendar year basis. (b.) For any given calendar year, the Permittee shall be in compliance with the annual TN (or TP) Load limit in this Permit if: (i.) the Permittee's annual TN (or TP) Load is less than or equal to the effective limit, or (ii.) the Permittee is a Co-Permittee Member of a compliance association. (c.) If the Permittee is not a co-permittee member of a compliance association and the Permittee's cumulative annual TN (or TP) discharge exceeds the effective TN (or TP) Load limit in this permit at any point during the calendar year, the Permittee is in violation of its TN (or TP) Load limit for the remainder of the calendar year, and each day of continuing violation shall constitute a separate violation. Compliance with annual limits shall be determined separately for each calendar year, and an exceedance in one year does not carry forward to subsequent years. (d.) The TN (or TP) Load limit in this Permit (if any) may be modified as the result of allowable changes in the Permittee's allocations. (i.) Allowable changes include those resulting from purchase of TN (or TP) allocation from an authorized mitigation banker, the Ecosystem Enhancement Program, or other source allowed under applicable regulations; purchase, sale, trade, or lease of allocation between the Permittee and other dischargers; and other transactions approved by the Division and consistent with the Tar -Pamlico River Basin Association Agreement, as revised. (ii.) The Permittee may request a modification of the TN (or TP) Load limit in this Permit to reflect allowable changes in its allocation(s). Upon receipt of timely and proper application, the Division will modify the permit as appropriate and in accordance with state and federal program requirements. (iii.) Changes in TN (or TP) limits become effective on January I of the year following permit modification. The Division must receive application no later than August 31 for changes proposed for the following calendar year. (iv.) Application shall be sent to: Page 6 of 10 NPDES Permit NCU02333'/ NCDWR / Water Quality Permitting Section Attn: Tar -Pamlico River Basin Coordinator 1617 Mail Service Center Raleigh, NC 27699-1617 (e.) If the Permittee is a member and co-permittee of an approved compliance association on January I of a given year, its TN and TP discharges during that year are governed by that association's group NPDES permit and the limits therein. (i.) The Permittee shall be considered a Co-Permittee Member for any given calendar year in which it is identified as such in Appendix A of the association's group NPDES permit. (ii.) Association roster(s) and members' TN and TP allocations will be updated annually and in accordance with state and federal program requirements. (iii.) If the Permittee intends to join or leave a compliance association, the Division must be notified of the proposed action in accordance with the procedures defined in the association's NPDES permit. (A) Upon receipt of timely and proper notification, the Division will modify the permit as appropriate and in accordance with state and federal program requirements. (B) Membership changes in a compliance association become effective on January I of the year following modification of the association's permit. (f) The TN and TP monitoring and reporting requirements in this Permit remain in effect throughout the term of the Permit and are not affected by the Permittee's membership in a compliance association. A.(6.) NUTRIENT ALLOCATIONS [G.S. 143-215.1(b)] (a.) Total Nitrogen (TN) and Total Phosphorus (TP) allocations represent the maximum TN and TP loads that a discharger or group of dischargers is potentially allowed under the Tar -Pamlico nutrient management strategy. Allocations are not enforceable limits but are the basis for TN and TP limits established in individual or group NPDES permits. (b.) The allocations originally assigned to the Tar -Pamlico Basin Association members total 889,274 Ib/yr (404,274 kg/yr) TN and 160,372 Ib/yr (73,060 kg/yr) TP. These group allocations have been divided among the members in proportion to the maximum permitted flow in each member's permit; that is, Individual Permitted Flow (MGDt GD) Individual -Vocation (T\ or TP1= Total PFlow,utted Flo, TPBi I=5IX Group:.11owuon, TPBA IT\ or TP) For the purposes of this distribution, individual permitted flows for the Association members are those in effect as of July 2014 and result in a Total Permitted Flow of 62.495 MGD. (c.) The following table lists, for information purposes only, the TN and TP allocations assigned to, acquired by, or transferred to the Permittee in accordance with the Tar -Pamlico River Basin Phase IV Agreement. Applicable TN or TP limits are established in the Effluent Limitations conditions of this permit or in the NPDES permit of a compliance association of which the Permittee is a Co- Permittee Member. ALLOCATION SOURCE DATE ALLOCATION AMOUNTrrr STATUS TYPE 0btyr) (kPJYr) Tar -Pamlico River Total Nitrogen Basin Phase IV 7/9/2015 123,456 345,678 Active Agreement Tar -Pamlico River Total Phosphorus Basin Phase IV 7/9/2015 2.816 5,632 Active Agreement Page 7 of 10 NPUrS Permit NCUU2333/ (d.) Any addition, deletion, or modification of the listed allocation(s) (other than to correct typographical errors) or any change from Reserve to Active status of any of the listed allocations shall be considered a major modification of this permit and shall be subject to the public review process afforded such modifications under state and federal rules. A. (7.) ELECTRONIC REPORTING OF DISCHARGE MONITORING REPORTS [G.S.143-215.1(b)] Federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and program reports. The final NPDES Electronic Reporting Rule was adopted and became effective on December 21. 2015. NOTE: This special condition supplements or supersedes the following sections within Part II of this permit (Standard Conditions Jor NPDES Permits): • Section B. (11.) Signatory Requirements • Section D. (2.) Reporting • Section D. (6.) Records Retention • Section E. (5.) Monitoring Reports 1. Reoortine Requirements ISuoersedes Section D. (2.) and Section E. (5.) (a)l The permittee shall report discharge monitoring data electronically using the NC DWR's Electronic Discharge Monitoring Report (eDMR) internet application. Monitoring results obtained during the previous month(s) shall be summarized for each month and submitted electronically using eDMR. The eDMR system allows permitted facilities to enter monitoring data and submit DMRs electronically using the internet. The eDMR system may be accessed at: his://deq.nc.gov/about/divisions/water-resources/edinr. If a permittee is unable to use the eDMR system due to a demonstrated hardship or due to the facility being physically located in an area where less than 10 percent of the households have broadband access, then a temporary waiver from the NPDES electronic reporting requirements may be granted and discharge monitoring data may be submitted on paper DMR forms (MR I, 1.1, 2, 3) or alternative forms approved by the Director. Duplicate signed copies shall be submitted to the following address: NC DEQ / Division of Water Resources / Water Quality Permitting Section ATTENTION: Central Files 1617 Mail Service Center Raleigh, North Carolina 27699-1617 See "How to Request a Waiver from Electronic Reporting" section below. Regardless of the submission method, the first DMR is due on the last day of the month following the issuance of the permit or in the case of a new facility, on the last day of the month following the commencement of discharge. Starting on December 21, 2025, the penmittee must electronically report the following compliance monitoring data and reports, when applicable: • Sewer Overflow/Bypass Event Reports; • Pretreatment Program Annual Reports; and • Clean Water Act (CWA) Section 316(b) Annual Reports. The perntittee may seek an electronic reporting waiver from the Division (see "How to Request a Waiver from Electronic Reporting" section below). Page 8 of 10 NPDES Permit NCU02333 / 2. Electronic Submissions In accordance with 40 CFR 122.41(1)(9), the petmittee must identify the initial recipient at the time of each electronic submission. The permittee should use the EPA's website resources to identify the initial recipient for the electronic submission. Initial recipient of electronic NPDES information from NPDES-regulated facilities means the entity (EPA or the state authorized by EPA to implement the NPDES program) that is the designated entity for receiving electronic NPDES data [see 40 CFR 127.2(b)]. EPA plans to establish a website that will also link to the appropriate electronic reporting tool for each type of electronic submission and for each state. Instructions on how to access and use the appropriate electronic reporting tool will be available as well. Information on EPA's NPDES Electronic Reporting Rule is found at: https://www federaire ig ster l+ov/documents/2015/10/22/2015-24954/national-pollutant-discharae- el imination-system-nodes-el ectronic-reporting-rule Electronic submissions must start by the dates listed in the "Reporting Requirements" section above 3. How to Request a Waiver from Electronic Reyortin¢ The permittee may seek a temporary electronic reporting waiver from the Division. To obtain an electronic reporting waiver, a permittee must first submit an electronic reporting waiver request to the Division. Requests for temporary electronic reporting waivers must be submitted in writing to the Division for written approval at least sixty (60) days prior to the date the facility would be required under this permit to begin submitting monitoring data and reports. The duration of a temporary waiver shall not exceed 5 years and shall thereupon expire. At such time, monitoring data and reports shall be submitted electronically to the Division unless the permittee re -applies for and is granted a new temporary electronic reporting waiver by the Division. Approved electronic reporting waivers are not transferrable. Only petmittees with an approved reporting waiver request may submit monitoring data and reports on paper to the Division for the period that the approved reporting waiver request is effective. Information on eDMR and the application for a temporary electronic reporting waiver are found on the following web page: hitp//deq nc gov/about/divisionsiwater-resources/edmr 4. Sienatory Reauirements ISupnlements Section B. (11 )_(b)-and Supersedes Section B.011.)( All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part 11, Section B. (I 1.)(a) or by a duly authorized representative of that person as described in Part 1I, Section B. (I 1.)(b). A person, and not a position, must be delegated signatory authority for eDMR reporting purposes. For eDMR submissions, the person signing and submitting the DMR must obtain an eDMR user account and login credentials to access the eDMR system. For more information on North Carolina's eDMR system, registering for eDMR and obtaining an eDMR user account, please visit the following web page: http://deci.nc gov/about/divisions/water-resources/edmr Certification. Any person submitting an electronic DMR using the state's eDMR system shall make the following certification [40 CFR 122.22). NO OTHER STATEMENTS OF CERTIFICATION WILL BE ACCEPTED: '9 certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on mry inquiry of the person at- persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best Page 9 of 10 Iiffu i] W11 " IItn Ilt►atillIYANSM of my knowledge and belief, true, accurate, and complete. 1 am amare that there are significant penalties for submittingfalse information, including the possibility of fines and imprisonment for knowing violations. " 5. Records Retention [Supplements Section D. (6.)I The perrnittee shall retain records of all Discharge Monitoring Reports, including eDMR submissions. These records or copies shall be maintained for a period of at least 3 years from the date of the report. This period may be extended by request of the Director at any time [40 CFR 122.41 J. A. (8.) EFFLUENT MERCURY ANALYSIS [15A NCAC 02B .0400 et seq., 02B .0500 et seq.] The Permittee shall provide one effluent mercury analysis, using EPA Method I631E, in conjunction with the next permit renewal application. The analysis should be taken within 12 months prior to the application date. Any additional effluent mercury measurements conducted from the effective date of this permit and up to the application date shall also be submitted with the renewal application. If the result of the mercury analysis is not provided with the application, the application may be returned as incomplete, and the Permittee considered non -compliant. Page 10 of 10 NPDES Permit NCO023337 • 1if,:h �, � . 1 rhici tip. 6M OP'v .,c .IraeJ Jch•`.sr 2 Scotia .k Neck sewage IS • ` • _ — . _ y e* / Canal Creek ;A (flows southwest) US Highliay 2511 >< Deep Creek _ - ` /- (flows South) 1:16.000.000 Ob Scotland Neck WWTP Receiving Stream: Canal Creek Stream Index: 28-79-32-1 Drainage Basin: Tar -Pamlico Sub -Basin: 03-03-04 Latitude: 36'07'03" Longitude:-77"26'01" Stream Class: C;NSW HUC: 030201020604 USGS Quad: Hobgood, NC County: Wake 124,000 0 0.15 0.3 0.6 mi 0 0.25 0.5 1 km North Copyright '72013 National Geographic Society. rvcubed NPDES Permit Standard Conditions Page I of 18 PART II STANDARD CONDITIONS FOR NPDES PERMITS Section A. Definitions 2/Month Samples are collected twice per month with at least ten calendar days between sampling events. These samples shall be representative of the wastewater discharged during the sample period. 3/Week Samples are collected three times per week on three separate calendar days. These samples shall be representative of the wastewater discharged during the sample period. Act or "the Act' The Federal Water Pollution Control Act, also known as the Clean Water Act (CWA), as amended, 33 USC 1251, et. seq. Annual Average The arithmetic mean of all "daily discharges" of a pollutant measured during the calendar year. In the case of fecal colifonn, the geometric mean of such discharges. Aridunetic Mean The summation of the individual values divided by the number of individual values. Bypass The known diversion of waste streams from any portion of a treatment facility including the collection system, which is not a designed or established or operating mode for the facility. Calendar Day The period from midnight of one day until midnight of the next day. However, for purposes of this permit, any consecutive 24-hour period that reasonably represents the calendar day may be used for sampling. Calendar Week The period from Sunday through the following Saturday. Calendar Quarter One of the following distinct periods: January through March. April through June. July through September, and October through December. Composite Sample A sample collected over a 24-hour period by continuous sampling or combining grab samples of at least 100 mL in such a manner as to result in a total sample representative of the wastewater discharge during the sample period. The Director may designate the most appropriate method (specific number and size of aliquots necessary, the time interval between grab samples, etc.) on a case -by -case basis. Samples may be collected manually or automatically. Composite samples may be obtained by the following methods: (1) Continuous: a single, continuous sample collected over a 24-hour period proportional to the rate of flow. (2) Constant time/variable volume: a series of grab samples collected at equal time intervals over a 24 hour period of discharge and combined proportional to the rate of flow measured at the time of individual sample collection, or (3) Variable time/constant volume: a series of grab samples of equal volume collected over a 24 hour period with the time intervals between samples determined by a preset number of gallons passing the sampling point. Flow measurement between sample intervals shall be determined by use of a flow recorder and totalizer, and the preset gallon interval between sample collection fixed at no greater than 1124 of the expected total daily flow at the treatment system, or Version 1110912011.2 Town of Scotland Neck NPDES NC0023337 Plant Evaluation March 4, 2020 On February 1, 2020, the Town of Scotland Neck resumed operation of the Wastewater Treatment Plant (W WTP). The Town's staff encountered several challenges with the operation of the facility along with permit non-compliance issues. The Town requested assistance from NC Rural Water Association in evaluating the facilities. A cursory review of the WWTP was done on March 2nd and 31. The following comments and observations are a result of this review: Preliminary Treatment Bar Screen One of the bars at the bottom of the screen is broken and pulled out of the water flow. Several of the other bars are pushed to the side. This creates a hole in the screen that will allow a significant amount of debris to pass by the screen and enter the flow channel and impact downstream processes. The bars should be repaired. The drainpipe for the screenings auger is disconnected. This allows wastewater to flow on the ground. Grit Removal The grit removal system consists of two grit pumps and a grit classifier. All these units are out of service. Grit is removed from the wastewater to prevent accumulation in downstream basins and to prevent excessive wear on pumps. To accomplish grit removal, the flow needs to slowed to approximately 1 fps to allow heavier grit to settle out. It appears that the existing grit removal system will not effectively remove grit even if all components were operational. The grit system is the old original grit chamber that had a flight and chain to move settled grit to a sump. The flight and chain were removed, the chamber was cut in to just downstream of the grit sump to install a line to the newer influent pump station. The suction for the two grit pumps are in this sump. It is not expected that significant grit removal will be accomplished by gravity settling of grit into this sump. Influent Pump Station There are three influent pumps in the influent pump station. One of the pumps is out -of -service at this time. Operational controls of the pumps were not evaluated. Chemical Feed System A caustic feed system is set up inside the influent pump station to provide pH adjustment as needed. There is one chemical feed pump which sets on top of the control panel for the influent pumps. If this pump or the tubing going to/from the pump fails, caustic could enter the control panel (door does not seal properly) and cause electrical failure of the influent pumps. Additionally, placement of the pump is a safety hazard. The storage tank for the 25%caustic is inside the influent pump station building. It appears that fumes/spills from this tank has caused deterioration of the building and could possibly cause premature failure of electrical components. Biological Treatment Process Oxidation Ditch The oxidation ditch has two brush aerators to provide mixing and dissolved oxygen (DO) to the biological system. The operation of theaerators is essential to the successful operation of the biological treatment system. One of the aerators is out -of -service and will have negative impacts on plant operations. During the evaluation period, the DO levels in the oxidation ditch were significantly less than the recommended DO levels for proper treatment. The oxidation ditch is approximately four feet deep with sloped sides. Information was not readily available to determine the volume or dimensions of the oxidation ditch. The ditch was probed from each side in an effort to determine the amount of grit/sludge accumulation in the bottom of the oxidation ditch. Two locations had a "sludge bank' in which the debris was nearly to the top of the water level and extended for 6+ feet. Several locations had accumulations of 2 -3 feet. When the debris was probed, a significant release of hydrogen sulfide gas was released. The production and release of hydrogen sulfide in the ditch can cause a drop in pH. The debris accumulation in the ditch also reduces the amount of detention time for biological treatment and could negatively affect compliance. Secondary Clarifiers There are two secondary clarifiers: Clarifier #1—the larger peripheral feed clarifier, and; Clarifier #2 — the smaller center feed clarifier. The purpose of the clarifiers is to allow the biological floc to settle to the bottom and a clarified effluent to flow over the top into the weirs and then to filtration. The settled sludge is returned to the oxidation ditch. Clarifier #2 was not in service during the evaluation because the Return Activated Sludge (RAS) pump was inoperable. The clarifier was cut on briefly and it does appear to be operational. The caulking at weirs is coming out and the concrete is showing signs of erosion. Clarifier #1 was in operation during the evaluation. The clarifier appears to have been modified by installing a small pump in the scum pit for return sludge pumping. This may have been necessitated by the failure of the RAS pumps in the Return Sludge Pump Station. The purpose of the RAS pump is to remove the settled sludge/bacteria from the clarifier and return to the oxidation ditch. Insufficient RAS pumping can cause a high sludge blanket to develop in the clarifier and possible overflow of the blanket to the following treatment processes. During the evaluation, the pump was insufficient to maintain a low sludge blanket in the clarifier. The aerator in the oxidation ditch was having to be cut off to reduce the solids going to the clarifier and allow the return pump to catch up. Excessive debris has accumulated between the outside wall and the influent baffle on Clarifier #1. The baffle wall is somewhat deflected at this area, possibly due to this buildup. Return Sludge Pump Station This pump station not only serves as the RAS pump station but also directs different flows (wastewater and sludge) to different locations around the plant site. The pumps in the pump station were inoperable. Clarifier #2 can not properly operate with this station out -of -service which increases the hydraulic and sludge loading on Clarifier 41. The loss of this station imp#cts wasting of excess sludge and other areas of wastewater operation. Filter Pump Station This pump station takes effluent flow from the clarifiers and pumps it to the sand filters. A failure of this system could cause a spill. There are two pumps in this station. Pump #1 is out -of -service. The door closure to the pump control panel is broken and will not latch. This will allow insects to enter and possibly cause problems. There is also a strong hydrogen sulfide odor in the pump station. This gas is corrosive and could damage electrical and mechanical components. Advanced Treatment Sand Filters Sand filters provide enhanced treatment by both physical and biological process. There are two sand filters. #2 sand filter is out -of -service and #1 sand filter can only me operated in manual mode. Necessary repairs and programming should be made to place the filters in automatic operation. The operation of the sand filters is also hampered by the lack of room in the digestor for storage of the filter backwash. Disinfection Chlorination/Dechlorination Chlorination is accomplished by adding sodium hypochlorite to the wastewater flow prior to the chlorine contact chamber. The dosage is dependent on several factors, including: quality of wastewater, temperature, pH, detention time, etc. The chlorine contact chambers had an accumulation of sludge in the bottom of the basin of 12+ inches. This accumulation can impact disinfection. The state generally wants the chlorine contact chamber when the sludge accumulation reaches six inches. The chamber was dye tested to determine actual detention time. The chamber is designed for a detention time of 30 minutes at design flow. The detention time was approximately 20 minutes at one-half the design flow. Disinfection is a critical process and it is recommended that there be spare pumps and parts for both the chlorination and dichlorination pumps. Sampling Sampler The permit requires effluent sampling to be flow proportional. This requirement is not enforced equally among the seven NC DWR Regional Offices and has not been enforced at this facility. The samples are time composited. s q Each discrete sample taken is required to be a minimum of 100 ml. Sample volume and number of samples taken in a 24-hour period should be adjusted to achieve the 100 ml sample volume and the minimum amount of composite sample volume needed for testing. Sludge Handling Dieestor The sludge digestor was completely filled at the time of the evaluation. Plant staff had cut off the aeration system to allow the sludge to settle and to decant clear water from the top, but the sludge was too thick. Every biological wastewater treatment plant creates new sludge/bacteria at all times. A successful operation requires the excess sludge to wasted out of the system on a regular basis. With the full digester, the staff can not remove the extra sludge and the failure to do so is having negative impacts on plant operation and compliance. Operations Major Issues At the time of the evaluation, there were several operational issues occurring that were detrimental to proper operations and compliance. The major contributory factor is the inability to waste excessive sludge from the system. This failure affects the oxidation ditch, clarifiers, filters and disinfection. Some (but not all) of the issues are: • High MLSS—normal range for MLSS concentration is 2,500-3,500 mg/L. Lab data from January 2020 shows the MLSS concentration to have been in the 8,000-9,000 mg/L range. Most recently, due to minimum wasting, the ML5S was approximately 6,000 mg/L. • DO in Oxidation Ditch —bacteria growing in the oxidation ditch require minimum DO levels for respiration. The normally accepted DO level for proper operation is approximately 2.0 mg/L. The DO in the ditch has been in the 0.4 mg/L range. This low number affects bacterial health, thereby affecting BODs, Ammonia Nitrogen, TSS and TP reduction. o The minimum DO level is not being achieved because: The aerators can not be run continuously due to the high MLSS concentrations overwhelming the clarifiers and because one of the aerators in inoperable. • Return Sludge Pump Station —The failure of this station prevents #2 clarifier from being put in service, which puts a strain on the #1 clarifier. • #1 Clarifier Return Pump — a combination of high MLSS and the low pumping capacity of the return sludge pump causes the sludge blanket in the clarifier to rise and to get excessively thick. Reducing the MLSS, increasing the capacity of this pump and/or returning the RAS Pump Station to service are needed. • Digestor— immediate sludge removal from the digestor is needed. The sludge can be land applied as a liquid or a dewatering box'or other dewatering device can be used to remove the sludge from the facility. Anoxic Zone The anoxic zone at the digestor does not appear to have been used recently. The anoxic zone is designed to reduce the total nitrogen content of the wastewater. If the facility is not meeting their Total Nitrogen limits as required by the Tar -Pamlico River Association, then this process should be placed in service. Process Control To properly operate the WWTP and maintain the optimal operating environment, staff needs to evaluate and document plant activities. MLSS meter ■ Microscope • Computer ■ Various process test modules for the spectrophotometer Miscellaneous This evaluation reviewed the most serious of the mechanical and operational issues that were apparent during a quick review of the facilities. During the evaluation, several safety deficiencies and possible OSHA violations were observed. In addition to the major mechanical and equipment failures, there were a number of minor maintenance issues that have not been addressed that could result in larger problems if not addressed. Town of Scotland Neck NPDES NCD023337 Plant Evaluation March 4, 2020 On February 1, 2020, the Town of Scotland Neck resumed operation of the Wastewater Treatment Plant (W WTP). The Town's staff encountered several challenges with the operation of the facility along with permit non-compliance issues. The Town requested assistance from NC Rural Water Association in evaluating the facilities. A cursory review of the W WTP was done on March 2"d and 3`d. The following comments and observations are a result of this review: Preliminary Treatment Bar Screen One of the bars at the bottom of the screen is broken and pulled out of the water flow. Several of the other bars are pushed to the side. This creates a hole in the screen that will allow a significant amount of debris to pass by the screen and enter the flow channel and impact downstream processes. The bars should be repaired. The drainpipe for the screenings auger is disconnected. This allows wastewater to flow on the ground. Grit Removal The grit removal system consists of two grit pumps and a grit classifier. All these units are out of service. Grit is removed from the wastewater to prevent accumulation in downstream basins and to prevent excessive wear on pumps. To accomplish grit removal, the flow needs to slowed to approximately 1 fps to allow heavier grit to settle out. It appears that the existing grit removal system will not effectively remove grit even if all components were operational. The grit system is the old original grit chamber that had a flight and chain to move settled grit to a sump. The flight and chain were removed, the chamber was cut in to just downstream of the grit sump to install a line to the newer influent pump station. The suction for the two grit pumps are in this sump. It is not expected that significant grit removal will be accomplished by gravity settling of grit into this sump. Influent Pump Station There are three influent pumps in the influent pump station. One of the pumps is out -of -service at this time. Operational controls of the pumps were not evaluated. Chemical Feed System A caustic feed system is set up inside the influent pump station to provide pH adjustment as needed. There is one chemical feed pump which sets on top of the control panel for the influent pumps. If this pump or the tubing going to/from the pump fails, caustic could enter the control panel (door does not seal properly) and cause electrical failure of the influent pumps. Additionally, placement of the pump is a safety hazard. The storage tank for the 25%caustic is inside the influent pump station building. It appears that fumes/spills from this tank has caused deterioration of the building and could possibly cause premature failure of electrical components. Biological Treatment Process Oxidation Ditch The oxidation ditch has two brush aerators to provide mixing and dissolved oxygen (DO) to the biological z system. The operation of the aerators is essintial to the successful operation of the biological treatment system. One of the aerators is out -of -service and will have negative impacts on plant operations. During the evaluation period, the DO levels in the oxidation ditch were significantly less than the recommended DO levels for proper treatment. The oxidation ditch is approximately four feet deep with sloped sides. Information was not readily available to determine the volume or dimensions of the oxidation ditch. The ditch was probed from each side in an effort to determine the amount of grit/sludge accumulation in the bottom of the oxidation ditch. Two locations had a "sludge bank" in which the debris was nearly to the top of the water level and extended for 6+ feet. Several locations had accumulations of 2 -3 feet. When the debris was probed, a significant release of hydrogen sulfide gas was released. The production and release of hydrogen sulfide in the ditch can cause a drop in pH. The debris accumulation in the ditch also reduces the amount of detention time for biological treatment and could negatively affect compliance. Secondary Clarifiers There are two secondary clarifiers: Clarifier #1—the larger peripheral feed clarifier, and; Clarifier #2 — the smaller center feed clarifier. The purpose of the clarifiers is to allow the biological floc to settle to the bottom and a clarified effluent to flow over the top into the weirs and then to filtration. The settled sludge is returned to the oxidation ditch. Clarifier #2 was not in service during the evaluation because the Return Activated Sludge (RAS) pump was inoperable. The clarifier was cut on briefly and it does appear to be operational. The caulking at weirs is coming out and the concrete is showing signs of erosion. Clarifier #1 was in operation during the evaluation. The clarifier appears to have been modified by installing a small pump in the scum pit for return sludge pumping. This may have been necessitated by the failure of the RAS pumps in the Return Sludge Pump Station. The purpose of the RAS pump is to remove the settled sludge/bacteria from the clarifier and return to the oxidation ditch. Insufficient RAS pumping can cause a high sludge blanket to develop in the clarifier and possible overflow of the blanket to the following treatment processes. During the evaluation, the pump was insufficient to maintain a low sludge blanket in the clarifier. The aerator in the oxidation ditch was having to be cut off to reduce the solids going to the clarifier and allow the return pump to catch up. Excessive debris has accumulated between the outside wall and the influent baffle on Clarifier #1. The baffle wall is somewhat deflected at this area, possibly due to this buildup. Return Sludge Pump Station This pump station not only serves as the RAS pump station but also directs different flows (wastewater and sludge) to different locations around the plant site. The pumps in the pump station were inoperable. Clarifier #2 can not properly operate with this station out -of -service which increases the hydraulic and sludge loading on Clarifier #1. The loss of this station impacts wasting of excess sludge and other areas of wastewater operation. Filter Pump Station This pump station takes effluent flow from the clarifiers and pumps it to the sand filters. A failure of this system could cause a spill. There are two pumps in this station. Pump #1 is out -of -service. The door closure to the pump control panel is broken and will not latch. This will allow insects to enter and possibly cause problems. There is also a strong hydrogen sulfide odor in the pump station. This gas is corrosive and could damage electrical and mechanical components. Advanced Treatment Sand Filters Sand filters provide enhanced treatment by both physical and biological process. There are two sand filters. #2 sand filter is out -of -service and #1 sand filter can only me operated in manual mode. Necessary repairs and programming should be made to place the filters in automatic operation. The operation of the sand filters is also hampered by the lack of room in the digestor for storage of the filter backwash. Disinfection Ch lori nation/Dechlori nation Chlorination is accomplished by adding sodium hypochlorite to the wastewater flow prior to the chlorine contact chamber. The dosage is dependent on several factors, including: quality of wastewater, temperature, pH, detention time, etc. The chlorine contact chambers had an accumulation of sludge in the bottom of the basin of 12+ inches. This accumulation can impact disinfection. The state generally wants the chlorine contact chamber when the sludge accumulation reaches six inches. The chamber was dye tested to determine actual detention time. The chamber is designed for a detention time of 30 minutes at design flow. The detention time was approximately 20 minutes at one-half the design flow. Disinfection is a critical process and it is recommended that there be spare pumps and parts for both the chlorination and dichlorination pumps. Sampling Sampler The permit requires effluent sampling to be flow proportional. This requirement is not enforced equally among the seven NC DWR Regional Offices and has not been enforced at this facility. The samples are time composited. ,y Each discrete sample taken is required to be a minimum of 100 mi. Sample volume and number of samples taken in a 24-hour period should be adjusted to achieve the 100 ml sample volume and the minimum amount of composite sample volume needed for testing. Sludge Handling Dizestor The sludge digestor was completely filled at the time of the evaluation. Plant staff had cut off the aeration system to allow the sludge to settle and to decant clear water from the top, but the sludge was too thick. Every biological wastewater treatment plant creates new sludge/bacteria at all times. A successful operation requires the excess sludge to wasted out of the system on a regular basis. With the full digester, the staff can not remove the extra sludge and the failure to do so is having negative impacts on plant operation and compliance. Operations Maior Issues At the time of the evaluation, there were several operational issues occurring that were detrimental to proper operations and compliance. The major contributory factor is the inability to waste excessive sludge from the system. This failure affects the oxidation ditch, clarifiers, filters and disinfection. Some (but not all) of the issues are: • High MLSS — normal range for MLSS concentration is 2,500 — 3,500 mg/L. Lab data from January 2020 shows the MLSS concentration to have been in the 8,000-9,000 mg/L range. Most recently, due to minimum wasting, the MLSS was approximately 6,000 mg/L. • DO in Oxidation Ditch — bacteria growing in the oxidation ditch require minimum DO levels for respiration. The normally accepted DO level for proper operation is approximately 2.0 mg/L. The DO in the ditch has been in the 0.4 mg/L range. This low number affects bacterial health, thereby affecting BODs, Ammonia Nitrogen, TSS and TP reduction. o The minimum DO level is not being achieved because: The aerators can not be run continuously due to the high MLSS concentrations overwhelming the clarifiers and because one of the aerators in inoperable. • Return Sludge Pump Station —The failure of this station prevents #2 clarifier from being put in service, which puts a strain on the #1 clarifier. • #1 Clarifier Return Pump — a combination of high MLSS and the low pumping capacity of the return sludge pump causes the sludge blanket in the clarifier to rise and to get excessively thick. Reducing the MLSS, increasing the capacity of this pump and/or returning the RAS Pump Station to service are needed. Digestor— immediate sludge removal from the digestor is needed. The sludge can be land applied as a liquid or a dewatering box or other dewatering device can be used to remove the sludge from the facility. Anoxic Zone The anoxic zone at the digestor does not appear to have been used recently. The anoxic zone is designed to reduce the total nitrogen content of the wastewater. If the facility is not meeting their Total Nitrogen limits as required by the Tar -Pamlico River Association, then this process should be placed in service. Process Control To properly operate the WWTP and maintain the optimal operating environment, staff needs to evaluate and document plant activities. • MLSS meter • Microscope • Computer • Various process test modules for the spectrophotometer Miscellaneous This evaluation reviewed the most serious of the mechanical and operational issues that were apparent during a quick review of the facilities. During the evaluation, several safety deficiencies and possible OSHA violations were observed. In addition to the major mechanical and equipment failures, there were a number of minor maintenance issues that have not been addressed that could result in larger problems if not addressed. TOWN OF SCOTLAND NECK P.O. Box 537 1310 MAIN STREET SCOTLAND NECK, NC 27874 Proiects Funded by The Town of Scotland Neck Since February 2020 1- Control Panel & 2 RAS Pumps $22,000.00 2- Influent Pump $14,000.00 3- Caustic Pumps $1,200.00 4- Jet Pump for Digester $13,000.00 5- Final Clarifier Dive Motor / Gearbox $2,500.00 6- Generator $200,000.00 7- OEM Replacement Rotor Aerator w/ Motor & Gearbox $78,850.00 Total --- $331,550.00 ENVIRODYNE SYSTEMS INC. Custom Water & Wastewater Treatment Equipment - Since 1971 75 Zimmerman Drive Camp Hill, PA, USA 17011 Phone: (717) 763-OSOO i Fas: (717) 7619306 I www.envirodynesystems.com PROP SAL October 22, 2021 TO: TOWN OF SCOTLAND NECK P.O. Box 537 1310 Main Street Scotland Neck, NC 27874 PROJECT: SC'.;]LAN li NLt_ F TOWN OF SCOTLAND NECK WWfP Modifications, Phase III Scotland Neck, NC 27874 Enviirodyne Systems Inc., called the Seller, proposes to furnish to the Town of Scotland Neck, called the Buyer, on the terms and conditions stated the equipment herein specified for installation in the WWTP, Scotland Neck, NC - Detailed Specifications set forth below or which may be attached hereto are a part of this Proposal. EQUIPMENT DESCRIPTION: OEM REPLACEMENT ROTOR AERATOR Town of Scotland Neck, NC October 22, 2021 Scotland Neck, NC - Page 2 of 4 - Equipment Ref OEM Reolacemenf Rotor Aerator One (I) ROTOR AERATOR, to be 42" did. x 23A" long for installation in existing oxidation ditch. Price includes and is limited to: Rotor, consisting of Torque tube, 14" O.D. x min. 3/8" ASTM A53 Gr. B seamless steel pipe with end flanges Drive & tail shafts, Integral type with solid cold -rolled steel journals Rotating Splash Plates, 48" did. x 1 /4" steel Blade Star Assemblies, forty-five (45) @ 6" o.c., ea. with 12 blades, 3" wide J-shape, min. 10 ga. 304 S.S. Bearings, self -aligning pillow block design, grease -lubricated, (drive - 4 15/16" did., tail - 4 7/6" did.) including seats & locking collars Drive, shaft -mounted double reduction helical gear reducer, min. Cl. II, incl. oil gauge. torque arm assembly, V-belts (1.5 S.F.) & taper -lock sheaves, S.S. belt guard, 50 HP, TEFC, NEMA Des. B, 1.15 S.F. motor for 230/460/3/60 service with mount Fasteners, 304 S.S. Anchor Bolts, 304 S.S. epoxy -type 'Surface Preparation 'Prime & Finish Coats of Point. 'Note: S.S. & alum. items not painted NOTES: 11) Removal of existing equipment, installation, groul, shims, piping, valves & fittings, electrical controls, conduit & wiring, field paint & painting, caulking, lubricants is sealants NOT included. (2) Rotors are shop assembled with integral head & tail shafts, blades fastened to torque tube and with rotating splash plates instated. 131 Motors, gear reducers, sheaves & Vbells will be shipped direct to jobsite (or Your shop) for mounting on adjustable bases. (4) All items not specifically described above (e.g.. stationary splash palest to be reused and are NOT included. Town of Scotland Neck, NC Scotland Neck, NC October 22, 2021 -Page 3 of 4- 2HUM Refefercemoy be mode in this Proposal to talon Specification Seclore llvshdanestecflysorldenBficohonpurposesondhrot lobe comtrued Ihof 6rvirodine Systems Inc. PFOPm&s to furnish ag items regdred by the referenced SW ens. Only the items wecikcdly manlloned or described In fhe OF0100101 wit be fadshed Ectipoent and moledals offered are of standard design and will comply with The gwefd Intent of the Specificolpx but may vary in some deloE fromlholspec,ted Our lender is offered in good faith and ire soot nor be Rabb 1p any coils. Erect or nclkect reRAIg ham disgppravd by the Owner MnlOn. speed fedI and castings we be gverl Re monuloclurees stmdardponl and solace preparation and prime coal. F&MOMpodnnol gON06zed to receive we flap cod of approved phmer, Fresh, coats are not Included except as rated heed. DRAWIKGS nckuded in the price as the necessary General Arrangement Ord Approval Drowing, Parts USIS Ord Erection Drawinge. Also included are detailed Erection. Mainfervnce and Operating losrnxl"wns. SER� 5en,kes of o qu0ified Feld RepresendtHe far inspecBon of Irle fyt{smanl Oiler nstdoflo Dy otttps a Ip erection supavkian. and for NkOi inslmatlon of hm Owner's personnel in Ile care, n ointenance and Operation of the Equipment are NQj ncluded in the Price but are avoildbe at a Per diem rate Of jISM plus hovel and fving expemen, ESTIMATlOSMIPMEMI Based upon present conditions, it is edrrnoled shipment of the EqulpmeM can be.mode.0hln 1610 20 weeks Oiler receipt of approved drawings and release tar manufacture. d a 0010y in SNWMnl. in excess of thirty (301 days it equesledafte'shipmeni k scheduled then an addHona Charge d 2% px month of the latal Price will be added until SMprrzill can be mode. PRICE Price Fa EONPM@R, DRAWNGS and SERVICES described M this PrOposat F.O.B. Factory Wllh truck height allowed to The nearest accessbla point to theiobsilels ...... _. ._. _ _ .. _.. _ 5...78.850.00... FrIce does nol include roles, use and/or o'hef taxes Ptkes quoted wig be adjusted to li~ changes In the Millais and Metal Products Index (MMF1) published by Ike U.S. Dept, of Loop, Bureau Of Labor Stoklks. The most recent pubkhed MMEI 11304.4 for duly 2021, If the MMFI exceeds 307 at the Ime the Equipment k released for manufacture the Price wig a Tncrsosed by the same ODIC edpgD as the MMPI exceeds 307, R Ms 4011 Ffleen percent 1)5%) vvth order (bl Fifty percent ISM Net 30 days after 00"01 Of Shop Drawings antl release for mdnuloclum; ICI Thirty percent PD%I Mel 30 do" offer dote of invoice fur COnplele a pat shipment Jill Balance We percent (5%) Not 30 days after installation checkout. Statap & Owner beneficial use: not to mood 120 dots after Shipment the right Is speCISCONy reserved 10 make and klvdCe Postal SNpmenl imerest an pod due accounts is charged at I 'A% per month. Final Release and Waver of Lien wit be given In consideration let payment ra the wok, services, materials a equipment provided, and a* to the indent that &such payment Is ocWayy received. AllarNtent: General Terms a Condi90ns Town of Scotland Neck. NC Scotland Neck, NC October 22, 2021 - Page 4 of 4 - ENVIROOYNE SYSTEMS INC. Oem.1 Terms and Cond4ions ACCEPTANCE. In tows Prtfawr MN M:x Nr. ralle, open me s.wa C+ d a 6 CONFORMANCE WITH LAWS. CODES, ETC: p repl.cdla a m«anw, Flt bna:lD ne[aa]n as Rye Cl atmuamuH lubrpap brreNllun E+enpn.w+ly •eq..Wcn ¢<mWlsn mV.r<xrm"y Weehaa.an Hdenb r,N taNta r«W N q Sty:« IN' IN. P'QN... yy1 EMQI. a'." : Nw,, +s attaa-1 br q SMnr a paarya aN waclrate,' set" nA M f+T Mrar tr,lu.e,rvMf a! RANa EW« -*aW., apow..4n MA., tIva. be M, M.CN a Feryr a N Weee, u]1 NIewel reraabM W VFaae 1. ,n4A d ,epee kre[lrAbWM fay,MAP.mwrhanV l+Na'ye.prewyagee4VlM Nren ygn¢aN vaN:vdrsd ..I.. mmd+,Nn stye N ewsdrN of N[Yrvtiv Ytl rba] xeb R Cary, ME PIMfYI,rN+I 2- DELIVERY Ni Ar•y I,Nrnem, nwlaq , Is ", a NNRNe•M or Nd ep . I r.4'rnatnl $.. Nr y Defl a4 ryM Ra {rap^Ca el MKn dY.e .f nq E.,aiNIN i4 rb I},Axed Qlnrap•ae+:[,pratb Inl?f![W 1.'I INV14"I"E DI d y wr3411+rera,F.e ypKlHp X WJr 4llr«t la,Hard a aN.eYN p/ IpaY a nr EnprgY gi.amnnl 11. Wne atcaN w1 arav ra,ne 1." Ra'N nnal'iN%tL^pa $a•Av MJ4I,N r1N+In Ca,nl 1p I"I" wry la..j 'le pYrla poNydrnraln'aWw INYar.N Moen wijofu µ xh I' . .n dn1aA N Nca(Iav9Io cause nx, S." •Iew N f1aN d f. pity A prth a ".NaT."a r. &.len ,wal V' Setnebram 4 aep,eed. a xKA tNre Nal r.NM1le.nxy b al paFONy d rya b'emaM al M p�•cl,awe pea nmenx«e wpecle4 YN n N M vxx a wvww 0. 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BECURIIY INTEREST: Sylr Iwrepy grle SeNew a tewerry Name., •n M eR.emaa mop Tnrd,Netl MN w¢.raY Nwey,IaE ¢14aN. taw b mq n al' p ale FaNan a IM pe[Mee mRe Mr r«nrn wwex4 aM %V,N4 WIMI K. AT av+a .ge«MRt a Bata vdn Ih. ar«al Upxr NeN,,era a IF n.'d'+te pre rN :—Fwwwan a N ae•e, A W. d &Nm N nea.A awa0«a awn [.pre rmwa ' W, Mlun y"We IN E«w 5. TA%ES, Ibeas 9-Ner ee Mm. S,.•Y VIN eej p«m Ora• VVl rempaN SIN. m atlpl. le M pre Nrmblde 010 b N twwy uae rd No ra.ea a m, aM uempy aM1dr Nw may par IN N wNFVNJ IN INY b ryr tNw,N nr! drwta/ n ad«aN b raYeecaen waN IN, vedk p W aa•4pmarn rare owe q MAd a "We a aq d M 4a,ryrnpN melnMw nWrm rfJ •rm rrd[•n I.lwNr N+w^re maw N regprdepN pea W a reapawa]Y1 B.rer aqN^sro pay m F'aa0y+alma lams Mir"R a). I. inenNadep +EMaI ae 1.allyertYlapipnaa al a Nr na 4xe d NLa alnpn¢II p p!aaq �Np aKraa Iw Svrewt Y.b.rl 6. CONFIDENTIAL INFORMATION: AT FIX.lro pY+naan a'IraraYeh Hq•. 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TNN 0I rrna rw r"j a mqN MNemlle hen b Ietawe, aNNwNWV a a a wrdeMN Mnepea d sr tad En+ M Sala rmg NCm Ie 0' N'Vew.a M ageewee 14s meaty .Fwtr.r,llen n cp«rkr p eaU d'"W, reep r7ana inn buwY r rr d,u, y ,V IN «,atwa "I 15_ LMNLITY. Ndaunrrdrq ar,Y Nd+Mf IN nq.rlw Nf astad q Seht lreance, Sew N+e r ro nM N e mbe W W PdA many apwrep e, martarrn:ebflf a ley TY prey Ketrd [bra:. [Tl[pl«ny Lpapn 4W f I.WllvnyY Naar. I a Nllew"Wee MNbll'bke,aa amnr.nV..aEYTINq IM EuYr b M $e �' h' Irx tgrwnwY M'm torn 16. OOVERNNq LAW- IM ageenwN ynlN 9fxd ndq Nb[anYuN r acr�rda xe •0 M New FI PVOWINN. are)pdN dnY -CMrt N lisp"", fy •'rgnl ,elre.IN, XXVNI AM tupdw,ir.e I. m d aM ewer IsrvF:Im 17 ENTIRE AGREEMENT,&.IN hey aofae PN M aanl a repesa•aaed Stye,,N N'V1011. dad Saw q. apeeme w prddN rapaeNNnea a sl+vmem reNla,g M N me, Yd M na wpm Wry+Ellrp IT wOx,wl t NeMN nY'n a raNe Nan r nvvr d Ines ageeMd and rw xy rrywr ra •Mu.e xbma^I IRM1r Inemal tlY_ RapNE SMr,PE d ENVIRODYNE SYSTEMS INC A¢ran:I ACame, NI PA Ni Uqw _._� ENNRODYN SY I', Sr DoaSigo Enelope ID: 98SEC903-D026 496F-989F-BC269208DADF ROY COOPER ELLMETH S. BISER an..sr S. DANIEL SNHTH Certified Mail # 7020 3160 0000 4115 3487 Retum Receipt Reaue_sted Eddie Braxton Town of Scotland Neck PO Box 537 Scotland Neck, NC 27874-0537 Fes, (� Ir � S 9)/ <\-;Yl Nd CANOINA January 7, 2022 SUBJECT: NOTICE OF VIOLATION 8: INTENT TO ASSESS CIVIL PENALTY Tracking Number: NOV-2021-MV-0131 Permit No. NCO023337 Scotland Neck WWTP Halifax County Dear Permittee: A review of the September 2021 Discharge Monitoring Report (DMR) for the subject facility revealed the violation(s) indicated below: Monitoring Violation(s)• Sample Location Parameter Monitoring Date Frequency Type of Violation uui rmuenc tsuu, !)-Day (20 Deg. C) - 9/4/2021 3 X week Frequency Violation Concentration (C0310) A Notice of Violation/Intent to Issue Civil Penalty is being issued for the noted violation of North Carolina General Statute (G.S.) 143-215.1 and the facility's NPDES WW Permit. Pursuant to G.S. 143-215.6A, a civil penalty of not more than twenty-five thousand dollars ($25,000.00) may be assessed against any person who violates or fails to act in accordance with the terms, conditions, or requirements of any permit Issued pursuant to G.S. 143-215.1. 114 OAKMONT DRIVE GREENVILLE, N.C. 27858 SCOTLAND NECK WWTP ATTN: PARRS BOYD PO BOX 537 SCOTLAND NECK, NC 27874 Influent PARAMETERS BOD. mg/l 45 Fecal Colirorm (MI), /100 Mls Total Suspended Residue, mg/l 26 Ammonia Nitrogen as N, mg/I 16.68 Total KJeldahi Nitrogen as N,mg/I Nitrate+Nitrite as N, mg/1 Total Phosphorus as P, mg/I Total Nitrogen, mg/I (calc) Mixed Liquor Susp. Solids, mg/1 Mixed Liquor Vol Sus. Solids,mg/l EfOuvnt 3.2 68 < 2.5 0.30 1.32 0.78 1.94 2.10 0r1nkl0a V.t.. 10: 31115 Motwater I0: 10 PHONE (252) 756-6208 FAX (252) 756-0633 ID#: 16 DATE COLLECTED: 09/01/21 DATE REPORTED : 09/13/21 v REVIENED BY: .Aeration Analysis Method Basin Date Analyst Code 09/01/21 DIJ 521OB-16 09/01/21 DNS 9222D-15 09/02/21 CAW 254OD-15 09/03/21 BMD 350.1 R2-93 09/10/21 TRJ 351.2 R2-93 09/03/21 TRi 353.2 R2-93 09/08/21 BMD 365.4-74 3650 09/03/21 JMS 254OD-15 2700 09/03/21 JMS 2540E-15 Environment 1, Inc. CHAIN OF CUSTODY RECORD r�PTB'Gx 7085. 114 Oakmont Dr. Grecoville, NC 27858 Pagc _l_ of cnvi ronmcnt t mc.com DISINFECTION Phone (252) 756-6208 • Fax (252) 756-063; i'HLl1KINf CHLORINE NEUTRALIZEDATCOUECTIDN CLIENT. 16 Wedt:41 Tu 1-2 ") 42 PHCHECK (LAB) v P CONTAINER TYPE, P/G SCOTLAND NECK WWTP ❑ NONE ATTN: PARKS BOYD P P P P P P P P PO BOX 537 SCOTLAND NECK NC 57874 ❑ CHEMICAL PRESERVATION A G A C C C C A A '0 �2 A -NONE D-NAOH (252) 813-0873 z w z @ g 9 n t- B-HNC, E-HCL 0 0 j F Z ggel� y o C-HtSO4 F- ZINC ACETATE/NAOH COLLECTION wo WM E 0 o LL o V � IR y � G-NATHIOSULFATE SAMPLE LOCATION DATE TIME o f-" ¢ Cf � Z E+ l- d Influent °) l 'L4 er ,33 1 143 CLASSIRCATION: EMuent I l z aw lI 5 - �'` .. WASTEWATER(NPDES) Aeration Basin &3 1 ❑ DRIN19NGWATER ❑ DWRIGW ❑ SOLID WASTE SECTION CHAIN OF CUSTODY (SEAL) MAINTAINED DURIN(' ' AENT/DELIVERY — Y N SAMPLES C„ CTED BY: (Pmase Prtgl �• dYl'�C� SAP,{ RECEIVED IN LABAT C FIELD ED (SIG)(SAMPLER) DATB71MME R IVBY(SIG.) DATERIME COMMENTS: li M'5 r II ❑ (I SIG DATERME REC IV Y D�_ — — BY( DATERMEGR RC VEBY(SIG. MME O' CACC o[no i...........:......