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Home My WebLink AboutNC0024236_Fact Sheet_20230914Fact Sheet NPDES Permit No. NCO024236 Permit Writer/Email Contact Nick Coco, nick.coco@deq.nc.gov: Date: August 15, 2023 Division/Branch: NC Division of Water Resources/NPDES Municipal Permitting Fact Sheet Template: Version 09Jan2017 Permitting Action: ❑X Renewal ❑ Renewal with Expansion ❑ New Discharge ❑ Modification (Fact Sheet should be tailored to mod request) Note: A complete application should include the following: • For New Dischargers, EPA Form 2A or 2D requirements, Engineering Alternatives Analysis, Fee • For Existing Dischargers (POTW), EPA Form 2A, 3 effluent pollutant scans, 4 2nd species WET tests. • For Existing Dischargers (Non-POTW), EPA Form 2C with correct analytical requirements based on industry category. Complete applicable sections below. If not applicable, enter NA. 1. Basic Facility Information Facility Information Applicant/Facility Name: City of Kinston/ Johnnie Mosley Regional Water Reclamation Facility (WRF) Applicant Address: 2101 Becton Farm Road, Kinston, NC 28501 Facility Address: 2101 Becton Farm Road, Kinston, NC 28501 Permitted Flow: 11.85 MGD Facility Type/Waste: MAJOR Municipal; 89% domestic, 11% industrial* Facility Class: Grade IV Biological Water Pollution Control System Treatment Units: manual bar screen, mechanical bar screen, grit chamber, pre- anoxic/anaerobic/anoxic/aeration basin, secondary clarifier, denitrification filter, UV disinfection, post aeration, sludge digester, filter press, thermal biosolids dryer system Pretreatment Program (Y/N) Y; LTMP County: Lenoir Region Washington *Based off of permitted flows. Briefly describe the proposed permitting action and facility background: The City of Kinston applied for an NPDES permit renewal at 11.85 MGD for the Johnnie Mosley Regional WRF on August 1, 2022. This facility serves a population of approximately 20,500 residents, as well as 8 significant industrial users, including 3 categorical industrial users (CIUs), via a Division -approved pretreatment program. Treated domestic and industrial wastewater is discharged into the Neuse River, a class C; NSW waterbody in the Neuse River Basin. No drinking water currently exists below the discharge. Inflow and Infiltration (I/IZ In their application, the City noted an estimated average daily I/I flow of 3.9 MGD. In discussion with the City's Environmental Compliance Supervisor, it was explained that the I/I was estimated by comparing the City's total sewer gallons billed to the plant's total gallons treated. The City has performed smoke testing of the Lower Neuse Outfall and located areas of concern. In addition, Page 1 of 13 the City has conducted CCTV inspections of the service area and located areas in need of repair on the downtown area of Kinston. As a result, the City has repaired 1,255 linear feet of 8" sewer main and added 14 new service laterals. The Barrus lift station has been rehabilitated as well. The City is funding 4 additional improvement projects to continue addressing issues with I/1. Sludge disposal: Sludge is land applied as class A sludge via WQ0003919. 2. Receiving Waterbody Information: Receiving Waterbody Information Outfalls/Receiving Stream(s): Outfall 001 - Neuse River Stream Segment: 27-(75.7) Stream Classification: C; NSW Drainage Area (mi2): 2552 Summer 7Q10 (cfs) 283 Winter 7Q10 (cfs): 292 30Q2 (cfs): 572 Average Flow (cfs): 1514 IWC (% effluent): 6.1 2022 303(d) listed/parameter: Not listed Subject to TMDL/parameter: Yes- State wide Mercury TMDL implementation. Basin/HUC: Neuse River/ 03020202 USGS Topo Quad: F28SE Kinston, NC 3. Effluent Data Summary Effluent data for Outfall 001 is summarized below for the period of January 2019 through June 2023. Table 1. Effluent Data Summary Outfall 001 Permit Parameter Units Average Max Min Limit Flow MGD 4.8 21.43 1.3 MA 11.85 Monitor & Total Monthly Flow MG/mo 146.6 321.9 86.5 Report WA 7.5 BOD summer mg/1 2.6 118 1.1 MA 5.0 BOD winter mg/l 2.9 142 1.6 WA 15.0 MA 10.0 NH3N summer mg/l 0.14 3.91 0.04 WA 3.0 MA 1.0 WA 6.0 NH3N winter mg/l 0.23 13.84 0.04 MA 2.0 WA 45.0 TSS* mg/l 29.4 12817* 0.5 MA 30.0 6.0 > pH S pH SU 6.8 8.28 5.75 9.0 Dissolved Oxygen mg/1 8.8 15 2.36 DA > 6.0 Page 2 of 13 (geomean) (geometric) Fecal coliform #/100 ml 2419.6 0.5 WA 400 2.4 MA 200 TRC (only when N/A; not N/A; not N/A; not DM 288.0 chlorination used) µg/1 used used used 50 compliance) Monitor & Temperature ° C 20.6 29.2 9.4 Report Conductivity µmhos/cm 1563 3704 190.4 Monitor & Report TKN mg/1 1.16 43.34 0.22 Monitor & Report NO2 + NO3 mg/1 1.20 4.92 0.24 Monitor & Report Monitor & TN mg/l 2.36 43.86 0.54 Report TN Load lb/mo 3,167 35,646 1,149 Monitor & Report TN Load lb/yr 391051 59,470 17,644 126,711 TP mg/l 1.0 31.8 < 1 QA 2.0 Total Hardness mg/l 52 71 34 Monitor & Report MA -Monthly Average, WA -Weekly Average, DM -Daily Maximum, DA=Daily Average, QA=Quarterly Calendar Year Average *See compliance summary for additional information. 4. Instream Data Summary Instream monitoring may be required in certain situations, for example: 1) to verify model predictions when model results for instream DO are within 1 mg/l of instream standard at full permitted flow; 2) to verify model predictions for outfall diffuser; 3) to provide data for future TMDL; 4) based on other instream concerns. Instream monitoring may be conducted by the Permittee, and there are also Monitoring Coalitions established in several basins that conduct instream sampling for the Permittee (in which case instream monitoring is waived in the permit as long as coalition membership is maintained). Is this facility a member of a Monitoring Coalition with waived instream monitoring (Y/N): YES Name of Monitoring Coalition: Lower Neuse Basin Association (LNBA) If applicable, summarize any instream data and what instream monitoring will be proposed for this permit action: The current permit requires instream monitoring for temperature, dissolved oxygen, fecal coliform, and conductivity upstream at least 100 feet above the outfall on the Neuse River and downstream at Highway 55 Bridge. As the permittee is a member of the Lower Neuse River Basin Association (LNBA) instream monitoring requirements are provisionally waived. The nearest upstream monitoring station is LNBA station J6150000, located approximately 9 miles upstream of the outfall. No discharge exists between LNBA station J6150000 and the Johnnie Mosley Regional WRF discharge. The nearest downstream monitoring station is LNBA station J6250000, located approximately 0.7 miles downstream of the outfall. Instream data from January 2019 through December 2022 have been summarized below in Table 2. Page 3 of 13 Table 2. Instream Monitoring Data Summary Parameter Units Upstream J6150000 Downstream J6250000 Average Max Min Average Max Min Temperature ° C 20.8 30.7 6.5 20.8 30.8 6.5 DO mg/1 7.7 11.9 4.4 7.7 11.9 4.4 Conductivity µmhos/cm 126 239 57 131 280 55 Fecal coliform #/100 ml (geomean) 73 1100 13 (geomean) 76 1200 13 Hardness mg/1 37.2 297 16 - - - Ammonia mg/1 0.1 0.48 0.02 0.1 0.35 0.02 NO2+NO3 mg/l 0.54 0.88 0.21 0.54 0.9 0.12 TKN mg/1 0.86 2.53 0.39 0.9 3.04 0.37 TP mg/1 0.11 0.27 0.04 0.11 0.31 0.03 pH s.u. 6.8 7.9 5.8 6.9 7.8 5.4 TSS mg/l 18.1 78 3.7 17.5 67 4.4 Turbidity NTUs 22.2 80 6.2 20.5 70 6.6 Students t-tests were run at a 95% confidence interval to analyze relationships between instream samples. A statistically significant difference is determined when the t-test p-value result is < 0.05. Downstream temperature was not greater than 32 degrees Celsius [per 15A NCAC 02B .0211 (18)] during the period reviewed. Downstream temperature was not greater than upstream temperature by more than 2.8 degrees Celsius during the period reviewed. It was concluded that no statistically significant difference exists between upstream and downstream temperature. Average downstream DO was above 5 mg/L [per 15A NCAC 02B .0211 (6)] during the period reviewed. Downstream DO was not observed at levels less than 4.0 mg/L during the period reviewed. It was concluded that no statistically significant difference exists between upstream and downstream DO. It was concluded that no statistically significant difference exists between upstream and downstream conductivity. While downstream fecal coliform was observed at levels greater than 400/100mL on two occasions during the period reviewed, one observance occurred concurrently with elevated upstream fecal coliform levels greater than 400/100mL. In review of concurrent effluent data, effluent fecal coliform concentrations were observed at levels lower than the instream concentrations. As such, it does not appear that effluent fecal coliform is influencing the receiving stream. Additionally, it was concluded that no statistically significant difference exists between upstream and downstream fecal coliform. While downstream pH was observed within the range of 6.0 to 9.0 standard units (s.u.) [per 15A NCAC 02B .0211 (14)] on two occasions (both < 6.0 s.u.) during the period reviewed, one observance occurred concurrently with upstream pH lower than 6 s.u. In review of concurrent effluent data, effluent pH were observed at levels within the range of 6.0 to 9.0 s.u. As such, it does not appear that effluent pH is Page 4 of 13 influencing the receiving stream. Additionally, it was concluded that no statistically significant difference exists between upstream and downstream pH. It was concluded that no statistically significant difference exists between upstream and downstream turbidity. While downstream turbidity was observed at levels greater than 50 NTUs [per 15A NCAC 02B .0211 (21)] during the period reviewed on 2 occasions, this observance occurred concurrently with elevated upstream turbidity levels. It was concluded that no statistically significant difference exists between upstream and downstream TSS. It was concluded that no statistically significant difference exists between upstream and downstream TKN, NO2+NO3, ammonia or total phosphorous. As the receiving stream is classified NSW and the Johnnie Mosely Regional WRF effluent is limited for Total Nitrogen and Total Phosphorous, instream monitoring for TKN, NO2+NO3, ammonia and TP have been added to the permit at a monthly frequency. 5. Compliance Summary Summarize the compliance record with permit effluent limits (past 5 years): The limit violations resulting in enforcement reported at the Johnnie Mosley Regional WRF from August 2018 to August 2023 have been summarized in Table 3 below. Table 3. Violation Report Summary Parameter Year 2018 2019 2020 2021 2022 2023 TSS - 2 7 7 1 2 BOD - 1 kL - H - - - - 2 - Fecal Coliform - - 2 - - - Total phosphorous - - - 1 - In their application, the City noted that the volume of daily I&I is approximately 3.9 MGD. The City has conducted smoke testing and CCTV inspections to locate areas of concern and set aside funding for 4 improvement projects to rehabilitate the collection system's problem areas to reduce I/I. The I/I experienced at the facility has contributed to numerous occasions where violations of total suspended solids (TSS) limits have occurred as well as instances where denitrification filters were bypassed to prevent damage. The work conducted by the City on their collection system since 2021 has reduced limit exceedances for TSS. As the City continues to remedy the issues with their collection system, the bypass events and limit exceedances will decrease in frequency and/or be eliminated. Summarize the compliance record with aquatic toxicity test limits and any second species test results (past 5 years): The facility passed 18 of 18 quarterly chronic toxicity tests as well as all 4 second species chronic toxicity tests from January 2019 to April 2023. Summarize the results from the most recent compliance inspection: The last facility inspection conducted in October 2021 reported that the facility was non -compliant with NPDES permit NC0024236. In their report, the Washington Regional Office inspector noted several issues experienced at the facility. On the day of the inspection, one of the mechanical bar screens was down due to a bearing failure. The bar screen has since been repaired. The City had installed a new effluent sampler but the sampler was unable to read the flow signal. The City has hired a technician to repair the sampler. In the meantime, the City set up a portable effluent sampler that is on constant time and constant volume. The belt press and sludge dryer were not in operation and the sludge holding pads were full on the day of the inspection. The City contacted Synagro for removal of the sludge from the sludge pads. The belt press is now operational. The Page 5 of 13 City is in the process of addressing the issues experienced with their sludge dryer. The City is actively working on repair of the sludge dryer. The inspector also noted that when the facility experiences high flows they tend to violate the NPDES permit. It appears that the major reason for this is Inflow and Infiltration. The City is working on identifying and repairing inflow and infiltration in the collection system. The last pretreatment inspection conducted in May 2023 reported that the facility was compliant. 6. Water Quality -Based Effluent Limitations (WQBELs) Dilution and MixingZones In accordance with 15A NCAC 2B.0206, the following streamflows are used for dilution considerations for development of WQBELs: 1 Q 10 streamflow (acute Aquatic Life); 7Q 10 streamflow (chronic Aquatic Life; non -carcinogen HH); 30Q2 streamflow (aesthetics); annual average flow (carcinogen, HH). If applicable, describe any other dilution factors considered (e.g., based on CORMIX model results): NA If applicable, describe any mixing zones established in accordance with 15A NCAC 2B.0204(b): NA Oxygen -Consuming Waste Limitations Limitations for oxygen -consuming waste (e.g., BOD) are generally based on water quality modeling to ensure protection of the instream dissolved oxygen (DO) water quality standard. Secondary TBEL limits (e.g., BOD= 30 mg/1 for Municipals) may be appropriate if deemed more stringent based on dilution and model results. Ifpermit limits are more stringent than TBELs, describe how limits were developed: Limitations for BOD and ammonia are water quality -based, BAT limits for new and expanded dischargers in the Neuse River Basin. No changes are proposed. Ammonia and Total Residual Chlorine Limitations Limitations for ammonia are based on protection of aquatic life utilizing an ammonia chronic criterion of 1.0 mg/1(summer) and 1.8 mg/1(winter). Acute ammonia limits are derived from chronic criteria, utilizing a multiplication factor of 3 for Municipals and a multiplication factor of 5 for Non -Municipals. Limitations for Total Residual Chlorine (TRC) are based on the NC water quality standard for protection of aquatic life (17 ug/1) and capped at 28 ug/1(acute impacts). Due to analytical issues, all TRC values reported below 50 ug/1 are considered compliant with their permit limit. Describe any proposed changes to ammonia and/or TRC limits for this permit renewal: TRC limits have been reviewed in the attached WLA and have been found to be protective. No changes are proposed. See Oxygen -Consuming Waste Limitations for background on existing ammonia limits. The ammonia limits have been reviewed in the attached WLA and have been found to be protective. No changes are proposed. Reasonable Potential Analysis (RPA) for Toxicants If applicable, conduct RPA analysis and complete information below. The need for toxicant limits is based upon a demonstration of reasonable potential to exceed water quality standards, a statistical evaluation that is conducted during every permit renewal utilizing the most recent effluent data for each outfall. The RPA is conducted in accordance with 40 CFR 122.44 (d) (i). The NC RPA procedure utilizes the following: 1) 95% Confidence Level/95% Probability; 2) assumption of zero background; 3) use of/z detection limit for "less than" values; and 4) streamflows used for dilution consideration based on 15A NCAC 213.0206. Effective April 6, 2016, NC began implementation of Page 6 of 13 dissolved metals criteria in the RPA process in accordance with guidance titled NPDES Implementation of Instream Dissolved Metals Standards, dated June 10, 2016. A reasonable potential analysis was conducted on effluent toxicant data collected between January 2019 and June 2023. Pollutants of concern included toxicants with positive detections and associated water quality standards/criteria. Based on this analysis, the following permitting actions are proposed for this permit: • Effluent Limit with Monitoring. The following parameters will receive a water quality -based effluent limit (WQBEL) since they demonstrated a reasonable potential to exceed applicable water quality standards/criteria: None • Monitoring Only. The following parameters will receive a monitor -only requirement since they did not demonstrate reasonable potential to exceed applicable water quality standards/criteria, but the maximum predicted concentration was >50% of the allowable concentration: None • No Limit or Monitoring: The following parameters will not receive a limit or monitoring, since they did not demonstrate reasonable potential to exceed applicable water quality standards/criteria and the maximum predicted concentration was <50% of the allowable concentration: Total Arsenic, Total Cadmium, Chlorides, Total Chromium, Total Copper, Total Cyanide, Total Lead, Total Molybdenum, Total Nickel, Total Selenium, Total Silver, Total Zinc • POTW Effluent Pollutant Scan Review: Three effluent pollutant scans (2020, 2021, 2022) were evaluated for additional pollutants of concern. o The following parameter(s) will receive a water quality -based effluent limit (WQBEL) with monitoring, since as part of a limited data set, two samples exceeded the allowable discharge concentration: None o The following parameter(s) will receive a monitor -only requirement, since as part of a limited data set, one sample exceeded the allowable discharge concentration: None o The following parameters will not receive a limit or monitoring, since they did not demonstrate reasonable potential to exceed applicable water quality standards/criteria and the maximum predicted concentration was <50% of the allowable concentration: Total Beryllium, Total Phenolic Compounds If applicable, attach a spreadsheet of the RPA results as well as a copy of the Dissolved Metals Implementation Fact Sheet for freshwater/saltwater to this Fact Sheet. Include a printout of the RPA Dissolved to Total Metal Calculator sheet if this is a Municipality with a Pretreatment Program. Toxicity Testing Limitations Permit limits and monitoring requirements for Whole Effluent Toxicity (WET) have been established in accordance with Division guidance (per WET Memo, 8/2/1999). Per WET guidance, all NPDES permits issued to Major facilities or any facility discharging "complex" wastewater (contains anything other than domestic waste) will contain appropriate WET limits and monitoring requirements, with several exceptions. The State has received prior EPA approval to use an Alternative WET Test Procedure in NPDES permits, using single concentration screening tests, with multiple dilution follow-up upon a test failure. Describe proposed toxicity test requirement: A chronic WET limit at 6.1 % effluent will continue on a quarterly frequency. Mercury Statewide TMDL Evaluation There is a statewide TMDL for mercury approved by EPA in 2012. The TMDL target was to comply with EPA's mercury fish tissue criteria (0.3 mg/kg) for human health protection. The TMDL established a wasteload allocation for point sources of 37 kg/year (81 lb/year), and is applicable to municipals and industrial facilities with known mercury discharges. Given the small contribution of mercury from point sources (-2% of total load), the TMDL emphasizes mercury minimization plans (MMPs) for point source Page 7 of 13 control. Municipal facilities > 2 MGD and discharging quantifiable levels of mercury (>1 ng/1) will receive an MMP requirement. Industrials are evaluated on a case -by -case basis, depending if mercury is a pollutant of concern. Effluent limits may also be added if annual average effluent concentrations exceed the WQBEL value (based on the NC WQS of 12 ng/1) and/or if any individual value exceeds a TBEL value of 47 ng/l. Table 4. Mercury Effluent Data Summary 2019 2020 2021 2022 2023 # of Samples 4 4 4 5 2 Annual Average Conc. n /L 0.5 0.5 0.5 0.5 0.5 Maximum Conc., n /L 0.5 0.5 0.5 0.5 0.5 TBEL, n L 47 WQBEL, n /L 196.9 Describe proposed permit actions based on mercury evaluation: Since no annual average mercury concentration exceeded the WQBEL, and no individual mercury sample exceeded the TBEL, no mercury limit is required. Since the facility reported no detections of low level mercury (all values > 1 ng/1), no mercury minimization plan (MMP) is required. Other TMDL/Nutrient Management Strategy Considerations If applicable, describe any other TMDLs/Nutrient Management Strategies and their implementation within this permit: The Environmental Management Commission adopted Nutrient Management Strategy rules in December 1997, classifying the entire Neuse River Basin as Nutrient Sensitive Waters. The point source rule [T15A NCAC 2B .0713 (previously .0234)] sets Total Nitrogen (TN) discharge limits for all point source dischargers larger than 0.5 MGD. The rule also allows dischargers to form a group compliance association and work together to reduce nitrogen; this option allows the association members added flexibility in controlling nitrogen discharges. At the same time, the association is subject to a group NPDES permit ensuring that the association and its individual members are accountable if they exceed the applicable nitrogen limits. Under the rule, there are three types of TN limit in the Neuse: 1. the individual limits in the dischargers' individual permits, 2. the aggregate limit in an association's group NPDES permit, and 3. the individual allocations/limits for each Association member, also in that association permit. A discharger may be subject to the first type of limit, or to the second and third, but never to all three at the same time. The discharger is first subject to the TN limit (if any) in its individual NPDES permit. If becomes a co-permittee to a compliance association's group NPDES permit, it is then governed by the TN limits in that permit. If the association complies with its group TN limit in a given year, all members are deemed to be in compliance with their individual allocations/ limits in the group permit. If the association exceeds its limit, the members then become subject to their individual allocations/ limits as well. Regardless of which permit governs a TN discharge, allocations/ limits will likely change over time as the dischargers purchase, sell, trade, lease, or otherwise transfer nitrogen allocations. The Division will modify the affected permits as necessary to ensure that the limits are kept up to date and reflect any such transactions. Nitrogen: The permit includes nutrient limits consistent with the Nutrient Management Strategy rule. Under the new rule, the Permittee receives a TN Load limit of 126,711 lb/yr, a calendar year limit. The limit reflects the Permittee's original allocation plus additional allocation received upon regionalization of Peachtree WWTP 's discharge. Page 8 of 13 Table 5: Annual Reported TN Load (Allocation = 126,711 lb/yr) 2019 2020 2021 2022 38,533lb/yr 40,557lb/yr 59,470lb/yr 17,644lb/yr 30.4% of allocation 32% of allocation 46.9% of allocation 13.9% of allocation Note: Reported flow approximately 40.5% of its permitted flow The Permittee is a member of the Neuse River Compliance Association at this time. So long as it remains a co-permittee member, it is deemed to be in compliance with the TN limit in this permit, and its TN discharge is governed instead by the Association's group NPDES permit NCC0000001, issued December 30, 2002. Phosphorus: The Permittee's 2.0 mg/L Total Phosphorus limit is carried forward in the new permit. It is a quarterly average limit to conform with the rule requirements. The 2019 through 2022 quarterly average reported TP ranged from 0.16 to 2.4 mg/L (NOV issued for quarterly average exceedance in March 2021). Other WQBEL Considerations If applicable, describe any other parameters of concern evaluated for WQBELs: As required by Session Law 2018-5, Senate Bill 99, Section I LI r), every applicant shall submit documentation of any additional pollutants for which there are certified methods with the permit application if their discharge is anticipated via a Chemical Addendum to NPDES Application table. As an attachment to the permit application, the City informed the Division that no monitoring for additional pollutants has been conducted (see attached chemical addendum) and therefore no additional pollutants of concern have been identified. If applicable, describe any special actions (HQW or ORW) this receiving stream and classification shall comply with in order to protect the designated waterbody: NA If applicable, describe any compliance schedules proposed for this permit renewal in accordance with 15A NCAC 2H. 0107(c) (2) (B), 40CFR 122. 47, and EPA May 2007 Memo: NA If applicable, describe any water quality standards variances proposed in accordance with NCGS 143- 215.3(e) and 15A NCAC 2B.0226 for this permit renewal: NA 7. Technology -Based Effluent Limitations (TBELs) Municipals (if not applicable, delete and skip to Industrials) Are concentration limits in the permit at least as stringent as secondary treatment requirements (30 mg/7 BODS/TSS for Monthly Average, and 45 mg/l for BODS/TSS for Weekly Average). YES If NO, provide a justification for alternative limitations (e.g., waste stabilization pond). NA Are 85% removal requirements for BODS/TSS included in the permit? YES; Overall removal of BOD and TSS was > 85% during the period reviewed. However, removal rates for TSS dropped below 85% on occasion during the period reviewed, notably linked to heavy rain events. As the City continues to repair their collection system to treat 1/1 issues, violations of TSS have become less common. If NO, provide a justification (e.g., waste stabilization pond). NA 8. Antidegradation Review (New/Expanding Discharge): The objective of an antidegradation review is to ensure that a new or increased pollutant loading will not degrade water quality. Permitting actions for new or expanding discharges require an antidegradation review in accordance with 15A NCAC 2B.0201. Each applicant for a new/expanding NPDES permit must document an effort to consider non -discharge alternatives per 15A NCAC 2H.0105( c)(2). In all Page 9 of 13 cases, existing instream water uses and the level of water quality necessary to protect the existing use is maintained and protected. If applicable, describe the results of the antidegradation review, including the Engineering Alternatives Analysis (EAA) and any water quality modeling results: NA 9. Antibacksliding Review: Sections 402(o)(2) and 303(d)(4) of the CWA and federal regulations at 40 CFR 122.44(1) prohibit backsliding of effluent limitations in NPDES permits. These provisions require effluent limitations in a reissued permit to be as stringent as those in the previous permit, with some exceptions where limitations may be relaxed (e.g., based on new information, increases in production may warrant less stringent TBEL limits, or WQBELs may be less stringent based on updated RPA or dilution). Are any effluent limitations less stringent than previous permit (YES/NO): No If YES, confirm that antibacksliding provisions are not violated: NA 10. Monitoring Requirements Monitoring frequencies for NPDES permitting are established in accordance with the following regulations and guidance: 1) State Regulation for Surface Water Monitoring, 15A NCAC 213.0500; 2) NPDES Guidance, Monitoring Frequency for Toxic Substances (7/15/2010 Memo); 3) NPDES Guidance, Reduced Monitoring Frequencies for Facilities with Superior Compliance (10/22/2012 Memo); 4) Best Professional Judgement (BPJ). Per US EPA (Interim Guidance, 1996), monitoring requirements are not considered effluent limitations under Section 402(o) of the Clean Water Act, and therefore anti - backsliding prohibitions would not be triggered by reductions in monitoring frequencies. For instream monitoring, refer to Section 4. In the current permit, total residual chlorine (TRC) is to be monitored 3/week. Per 15A NCAC 02B .0508, Grade IV facilities shall monitor for TRC daily. As such, the monitoring frequency has been revised to daily. TRC shall only be limited and monitored if chlorine or chlorine derivatives are used as a back-up disinfectant. To identify PFAS concentrations throughout the State, monitoring of PFAS chemicals has been added to the permit at a frequency of quarterly. Since an EPA method for sampling and analyzing PFAS in wastewater is not currently available, the PFAS sampling requirement in the Permit includes a compliance schedule which delays the effective date of this requirement until the first full calendar quarter beginning 6 months after EPA has a final wastewater method in 40 CFR136 published in the Federal Register. This date may be extended upon request and if there are no NC -certified labs. 11. Electronic Reporting Requirements The US EPA NPDES Electronic Reporting Rule was finalized on December 21, 2015. Effective December 21, 2016, NPDES regulated facilities are required to submit Discharge Monitoring Reports (DMRs) electronically. While NPDES regulated facilities would initially be required to submit additional NPDES reports electronically effective December 21, 2020, EPA extended this deadline from December 21, 2020, to December 21, 2025. The current compliance date, effective January 4, 2021, was extended as a final regulation change published in the November 2, 2020 Federal Register. This permit contains the requirements for electronic reporting, consistent with Federal requirements. Page 10 of 13 12.Summary of Proposed Permitting Actions: Table 4. Current Permit Conditions and Proposed Changes Outfall 001 Parameter Current Permit Proposed Change Basis for Condition/Change Flow MA 11.85 MGD No change 15A NCAC 2B .0505 Total Monthly Monitor and Report No change For calculation of TN loads Flow Monthly BOD5 Summer: No change WQBEL. BAT for new and expanded MA 5.0 mg/l dischargers in the Neuse River Basin; WA 7.5 mg/l Surface Water Monitoring, 15A Winter: NCAC 2B. 0508 MA 10.0 mg/l WA 15.0 mg/l Monitor and report Dail NH3-N Summer: No change WQBEL. BAT for new and expanded MA 1.0 mg/l dischargers in the Neuse River Basin; WA 3.0 mg/l Surface Water Monitoring, 15A Winter: NCAC 2B. 0508 MA 2.0 mg/l WA 6.0 mg/l Monitor and report Dail TSS MA 30.0 mg/l No change TBEL. Secondary treatment WA 45.0 mg/l standards/40 CFR 133 / 15A NCAC Monitor and report 2B .0406; Surface Water Monitoring, Daily 15A NCAC 2B. 0508 DO DA > 6 mg/l No change WQBEL. State WQ standard, 15A NCAC 2B .0200; Surface Water Monitoring, 15A NCAC 2B. 0508 Fecal coliform MA 200 /100ml No change WQBEL. State WQ standard, 15A WA 400 /100ml NCAC 2B .0200; Surface Water Monitor and report Monitoring, 15A NCAC 2B. 0508 Dail Temperature Monitor and Report No change Surface Water Monitoring, 15A Daily NCAC 2B. 0508 pH 6 — 9 SU No change WQBEL. State WQ standard, 15A Monitor and Report NCAC 2B .0200; 15A NCAC 02B Daily .0508 Total Residual DM 28 ug/L No change to limit WQBEL. 2023 WLA. Surface Water Chlorine Monitor and Report Monitor and Report Monitoring, 15A NCAC 2B. 0508 3/Week Daily Conductivity Monitor and Report No change Surface Water Monitoring, 15A Daily NCAC 2B. 0508 TKN Monitor and Report No change For calculation of TN Weekly Nitrate + Monitor and Report No change For calculation of TN Nitrite Weekly Total Nitrogen Monitor and Report No change 15A NCAC 02B .0713; Surface Water Weekly Monitoring, 15A NCAC 2B. 0508 Page 11 of 13 TN Load Monitor and Report WQBEL. 15A NCAC 02B .0713 monthly (lb/mo) 126,711 lb/yr Monitor and Report yearly (lb/yr) Total QA 2.0 mg/L No change WQBEL. 15A NCAC 02B .0713; Phosphorus Monitor and Report Surface Water Monitoring, 15A Weekly NCAC 2B. 0508 Total Hardness Quarterly monitoring No changes Hardness -dependent dissolved metals Upstream and in water quality standards approved in Effluent 2016 Add quarterly Evaluation of PFAS contribution: PFAS No requirement monitoring with Implementation delayed until after delayed EPA certified method becomes im lementation available. Toxicity Test Chronic limit, 6.1% No change WQBEL. No toxics in toxic amounts. effluent 15A NCAC 2B.0200 and 15A NCAC 213.0500 Effluent Three times per permit No change; conduct 40 CFR 122 Pollutant Scan cycle in 2025, 2026, 2027 Instream Instream monitoring for Add monthly Surface Water Monitoring, 15A Monitoring temperature, fecal monitoring of TKN, NCAC 2B. 0508; Discussion with coliform, dissolved NO2+NO3, ammonia Basin Planning Branch and oxygen and conductivity and TP consideration of NSW once per week from October 1 through May 30, and 3 times per week from June 1 through September 30; provisional waiver due to LNBA membership Calculation of Special Condition A.(2.) Condition 15A NCAC 02B .0713 TN Load maintained; rearranged to Special Condition A.(5.) Annual Limits Special Condition A.(3.) Condition 15A NCAC 02B .0713 for TN maintained; rearranged to Special Condition A.(6.) TN Allocations Special Condition A.(4.) Condition 15A NCAC 02B .0713 maintained; rearranged to Special Condition A.(7.) Electronic Electronic Reporting No change In accordance with EPA Electronic Reporting Special Condition Reporting Rule 2015. MGD — Million gallons per day, MA - Monthly Average, WA — Weekly Average, DM — Daily Max Page 12 of 13 13. Public Notice Schedule: Permit to Public Notice: xx/xx/xxxx Per 15A NCAC 2H .0109 & .0111, The Division will receive comments for a period of 30 days following the publication date of the public notice. Any request for a public hearing shall be submitted to the Director within the 30 days comment period indicating the interest of the party filing such request and the reasons why a hearing is warranted. 14. NPDES Division Contact If you have any questions regarding any of the above information or on the attached permit, please contact Nick Coco at (919) 707-3609 or via email at nick.cocogdeq.nc.gov. 15. Fact Sheet Addendum (if applicable): Were there any changes made since the Draft Permit was public noticed (Yes/No): NO If Yes, list changes and their basis below: NA 1 16. Fact Sheet Attachments (if applicable): • RPA Spreadsheet Summary • NPDES Implementation of Instream Dissolved Metals Standards — Freshwater Standards • NH3/TRC WLA Calculations • BOD & TSS Removal Rate Calculations • Mercury TMDL Calculations • Monitoring Frequency Reduction Evaluation • POC Review Form • WET Testing and Self -Monitoring Summary • Compliance Inspection Report • Requested Additional Information • Chemical Addendum Page 13 of 13 Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators MAXIMUM DATA POINTS = 58 Table 1. Project Information Facility Name WWTP/WTP Class NPDES Permit Outfall Flow, Qw (MGD) Receiving Stream HUC Number Stream Class ❑ CHECK IF HQW OR ORW WQS Johnnie Mosely Regional WRF IV NCO024236 001 11.850 Neuse River 03020202 C;NSW ElApply WS Hardness WQC 7Q10s (cfs) 7Q10w (cfs) 30Q2 (cfs) QA (cfs) 1 Q10s (cfs) 283.000 292.00 572.00 1514.00 229.33 Effluent Hardness Upstream Hardness Combined Hardness Chronic Combined Hardness Acute 51.95 mg/L (Avg) 37.72 mg/L (Avg) 38.59 m /L 38.78 m /L Data Source(s) ❑ CHECK TO APPLY MODEL REQUIRED DATA ENTRY Par01 Par02 Par03 Par04 Par05 Par060 Par07 Par08 Par09 Par10 Par11 Par12 Par13 Par14 Par15 Par16 Par17 Par18 Par19 Par20 Par21 Par22 Par23 Par24 Table 2. Parameters of Concern Name WQs Type Chronic Modifier Acute PQL Units Arsenic Aquactic Life C 150 FW 340 ug/L Arsenic Human Health Water Supply C 10 HH/WS N/A ug/L Beryllium Aquatic Life NC 6.5 FW 65 ug/L Cadmium Aquatic Life NC 0.8191 FW 4.7524 ug/L Chlorides Aquatic Life NC 230 FW mg/L Chlorinated Phenolic Compounds Water Supply NC 1 A ug/L Total Phenolic Compounds Aquatic Life NC 300 A ug/L Chromium III Aquatic Life NC 167.9961 FW 1296.6351 ug/L Chromium VI Aquatic Life NC 11 FW 16 pg/L Chromium, Total Aquatic Life NC N/A FW N/A pg/L Copper Aquatic Life NC 11.4198 FW 15.8360 ug/L Cyanide Aquatic Life NC 5 FW 22 10 ug/L Fluoride Aquatic Life NC 1,800 FW ug/L Lead Aquatic Life NC 4.7863 FW 123.4911 ug/L Mercury Aquatic Life NC 12 FW 0.5 -,^" Molybdenum Human Health NC 2000 HH ug/L Nickel Aquatic Life NC 53.7528 FW 485.9509 pg/L Nickel Water Supply NC 25.0000 WS N/A pg/L Selenium Aquatic Life NC 5 FW 56 ug/L Silver Aquatic Life NC 0.06 FW 0.6306 ug/L Zinc Aquatic Life NC 183.0751 FW 182.3384 ug/L 24236 RPA, input 8/16/2023 REASONABLE POTENTIAL ANALYSIS H1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 H2 Use "PASTE SPECIAL Effluent Hardness Values" then "COPY" Maximum data points = 58 Date Data BDL=1/2DL Results 1 /8/2019 71 71 Std Dev. 8.8849 4/9/2019 66 66 Mean 51.9474 7/9/2019 58 58 C.V. 0.1710 10/8/2019 43 43 n 19 1/7/2020 54 54 10th Per value 42.80 mg/L 4/7/2020 50 50 Average Value 51.95 mg/L 7/14/2020 54 54 Max. Value 71.00 mg/L 10/6/2020 54 54 1/12/2021 46 46 4/13/2021 46 46 7/13/2021 61 61 10/5/2021 56 56 1 /20/2022 44 44 4/5/2022 48 48 6/14/2022 59 59 7/14/2022 34 34 10/6/2022 42 42 1/10/2023 49 49 4/24/2023 52 52 Upstream Hardness Date Data BDL=1/2DL 1 1 /30/2019 32 32 2 2/13/2019 27 27 3 3/13/2019 21 21 4 4/8/2019 40 40 5 5/20/2019 80 80 6 6/4/2019 44 44 7 7/24/2019 36 36 8 8/21 /2019 23 23 9 9/19/2019 33 33 10 10/14/2019 39 39 11 11/18/2019 30 30 12 12/30/2019 33 33 13 1 /27/2020 30 30 14 2/17/2020 18 18 15 3/23/2020 28 28 16 4/21 /2020 28 28 17 5/11/2020 26 26 18 6/1 /2020 28 28 19 7/20/2020 36 36 20 8/12/2020 26 26 21 9/23/2020 22 22 22 10/15/2020 30 30 23 11 /9/2020 34 34 24 12/7/2020 22 22 25 1 /4/2021 24 24 26 2/8/2021 33 33 27 3/8/2021 22 22 28 4/5/2021 26 26 29 5/10/2021 33 33 30 6/14/2021 24 24 31 7/14/2021 20 20 32 8/23/2021 37 37 33 9/29/2021 36 36 34 10/14/2021 27 27 35 11 /29/2021 48 48 36 12/29/2021 42 42 37 1 /27/2022 44 44 38 2/17/2022 30 30 39 3/15/2022 30 30 40 4/26/2022 43 43 41 5/12/2022 40 40 42 6/9/2022 32 32 43 7/13/2022 24 24 44 8/18/2022 35 35 45 9/8/2022 36 36 46 10/17/2022 39 39 47 11 /21 /2022 69 69 48 12/19/2022 32 32 49 1 /17/2023 16 16 50 2/2/2023 36 36 51 3/2/2023 36 36 52 4/27/2023 24 24 53 5/8/2023 297 297 54 6/8/2023 36 36 55 56 57 58 Results Std Dev. Mean C.V. n 10th Per value Average Value Max. Value Use "PASTE SPECIAL Values" then "COPY" Maximum data points = 58 37.5813 37.7222 0.9963 54 22.00 mg/L 37.72 mg/L 297.00 mg/L -1- 24236 RPA, data 8/16/2023 REASONABLE POTENTIAL ANALYSIS Par01 & Par02 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 Arsenic Date Data BDL=1/2DL 1 /8/2019 < 5 2.5 4/9/2019 < 5 2.5 7/9/2019 < 5 2.5 10/8/2019 < 5 2.5 1 /7/2020 < 5 2.5 4/7/2020 < 5 2.5 7/14/2020 < 5 2.5 10/6/2020 < 5 2.5 1/12/2021 < 5 2.5 4/13/2021 < 5 2.5 7/13/2021 < 5 2.5 10/5/2021 < 5 2.5 1 /20/2022 < 5 2.5 4/5/2022 < 5 2.5 6/14/2022 < 2 1 7/14/2022 < 5 2.5 10/6/2022 < 5 2.5 1/10/2023 < 5 2.5 4/24/2023 < 5 2.5 Results Std Dev Mean C.V. n Mult Factor = Max. Value Max. Pred Cw Use "PASTE SPECIAL Values" then "COPY" Maximum data points = 58 0.3441 2.4211 0.1421 19 1.09 2.5 ug/L 2.7 ug/L -2- 24236 RPA, data 8/16/2023 REASONABLE POTENTIAL ANALYSIS Par03 Date Data 1 1/12/2021 < 2 6/14/2022 < 3 4/7/2020 < 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 P a r04 Use "PASTE SPECIAL Beryllium Values" then "COPY" Maximum data points = 58 BDL=1/2DL Results Date Data 1 0.5 Std Dev. 0.0000 1 1/8/2019 < 1 0.5 Mean 0.5000 2 4/9/2019 < 1 0.5 C.V. (default) 0.6000 3 7/9/2019 < n 3 4 10/8/2019 < 5 1 /7/2020 < Mult Factor = 3.00 6 4/7/2020 < Max. Value 0.50 ug/L 7 7/14/2020 < Max. Pred Cw 1.50 ug/L 8 10/6/2020 < 9 1/12/2021 < 10 4/13/2021 < 11 7/13/2021 < 12 10/5/2021 < 13 1 /20/2022 < 14 4/5/2022 < 15 6/14/2022 < 16 7/14/2022 < 17 10/6/2022 < 18 1/10/2023 < 19 4/24/2023 < 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 < 53 < 54 < 55 < 56 < 57 < 58 < Cadmium BDL=1/2DL Results 1 0.5 Std Dev. 1 0.5 Mean 1 0.5 C.V. 1 0.5 n 1 0.5 1 0.5 Mult Factor = 1 0.5 Max. Value 1 0.5 Max. Pred Cw 1 0.5 1 0.5 1 0.5 1 0.5 1 0.5 1 0.5 0.5 0.25 1 0.5 1 0.5 1 0.5 1 0.5 ERR ERR ERR ERR ERR ERR ERR Use "PASTE SPECIAL Values" then "COPY" Maximum data points = 58 0.0574 0.4868 0.1178 19 1.07 0.500 ug/L 0.535 ug/L -3- 24236 RPA, data 8/16/2023 REASONABLE POTENTIAL ANALYSIS Par05 Chlorides use "PASTE SPECIAL -Values" then "COPY". Par07 Total Phenolic Compounds Maximum data points = 58 Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results 1 1 /8/2019 151 151 Std Dev. ###### 1 6/14/2022 < 20 10 Std Dev. 2 4/9/2019 280 280 Mean 378.1 2 1/12/2021 < 20 10 Mean 3 7/9/2019 325 325 C.V. 0.5503 3 4/7/2020 < 10 5 C.V. (default) 4 10/8/2019 380 380 n 18 4 n 5 1 /7/2020 330 330 5 6 4/7/2020 940 940 Mult Factor = 1.4 6 Mult Factor = 7 7/14/2020 350 350 Max. Value 940.0 mg/L 7 Max. Value 8 10/6/2020 296 296 Max. Pred Cw 1,297.2 mg/L 8 Max. Pred Cw 9 1/12/2021 87 87 9 10 4/13/2021 312 312 10 11 7/13/2021 408 408 11 12 10/5/2021 797 797 12 13 1 /20/2022 216 216 13 14 4/5/2022 242 242 14 15 7/14/2022 356 356 15 16 10/6/2022 565 565 16 17 1/10/2023 370 370 17 18 4/24/2023 401 401 18 19 19 20 20 21 21 22 22 23 23 24 24 25 25 26 26 27 27 28 28 29 29 30 30 31 31 32 32 33 33 34 34 35 35 36 36 37 37 38 38 39 39 40 40 41 41 42 42 43 43 44 44 45 45 46 46 47 47 48 48 49 49 50 50 51 51 52 52 53 53 54 54 55 55 56 56 57 57 58 58 Use"PASTE SPECIAL -Values" then "COPY". Maximum data points = 58 2.8868 8.3333 0.6000 3 3.00 10.0 ug/L 30.0 ug/L 24236 RPA, data -4- 8/16/2023 REASONABLE POTENTIAL ANALYSIS Par10 Date Data 1 1 /8/2019 < 2 4/9/2019 < 3 7/9/2019 < 4 10/8/2019 < 5 1 /7/2020 < 6 4/7/2020 < 7 7/14/2020 < 8 10/6/2020 < 9 1/12/2021 < 10 4/13/2021 < 11 7/13/2021 < 12 10/5/2021 < 13 1 /20/2022 < 14 4/5/2022 < 15 6/14/2022 < 16 7/14/2022 < 17 10/6/2022 < 18 1/10/2023 < 19 4/24/2023 < 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 Chromium, Total BDL=1/2DL Results 5 2.5 Std Dev. 5 2.5 Mean 5 2.5 C.V. 5 2.5 n 5 2.5 5 2.5 Mult Factor = 5 2.5 Max. Value 5 2.5 Max. Pred Cw 5 2.5 5 2.5 5 2.5 5 2.5 5 2.5 5 2.5 5 2.5 5 2.5 5 2.5 5 2.5 5 2.5 Use "PASTE SPECIAL Values" then "COPY" Maximum data points = 58 0.0000 2.5000 0.0000 19 1.00 2.5 pg/L 2.5 dig/L Pal Date Data 1 1 /8/2019 < 2 4/9/2019 < 3 7/9/2019 < 4 10/8/2019 < 5 1 /7/2020 < 6 4/7/2020 7 7/14/2020 < 8 10/6/2020 < 9 1/12/2021 < 10 4/13/2021 11 7/13/2021 12 10/5/2021 13 1 /20/2022 < 14 4/5/2022 < 15 6/14/2022 16 7/14/2022 < 17 10/6/2022 18 1 /10/2023 19 4/24/2023 < 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 Copper BDL=1/2DL Results 2 1 Std Dev. 2 1 Mean 2 1 C.V. 2 1 n 2 1 3 3 Mult Factor = 2 1 Max. Value 2 1 Max. Pred Cw 2 1 3 3 2 2 2 2 2 1 2 1 2 2 2 1 2 2 2 2 2 1 Use "PASTE SPECIAL Values" then "COPY" Maximum data points = 58 0.6967 1.4737 0.4728 19 1.30 3.00 ug/L 3.90 ug/L 24236 RPA, data -5- 8/16/2023 REASONABLE POTENTIAL ANALYSIS Par12 Date Data 1 1 /8/2019 < 2 4/9/2019 < 3 7/9/2019 < 4 10/8/2019 < 5 1 /7/2020 < 6 4/7/2020 < 7 7/14/2020 < 8 10/6/2020 < 9 1/12/2021 < 10 4/13/2021 < 11 7/13/2021 < 12 10/5/2021 < 13 1 /20/2022 < 14 4/5/2022 < 15 6/14/2022 < 16 7/14/2022 < 17 10/6/2022 < 18 1/10/2023 < 19 4/24/2023 < 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 Cyanide BDL=1/2DL Results 5 5 Std Dev. 5 5 Mean 5 5 C.V. 5 5 n 5 5 5 5 Mult Factor = 5 5 Max. Value 5 5 Max. Pred Cw 5.0 5 5.0 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 Par14 Use "PASTE SPECIAL Values" then "COPY" Maximum data points = 58 0.0000 5.00 0.0000 19 1.00 5.0 ug/L 5.0 ug/L Date 1 1 /8/2019 < 2 4/9/2019 < 3 7/9/2019 < 4 10/8/2019 < 5 1 /7/2020 < 6 4/7/2020 < 7 7/14/2020 < 8 10/6/2020 < 9 1 /12/2021 10 4/13/2021 < 11 7/13/2021 < 12 10/5/2021 < 13 1 /20/2022 < 14 4/5/2022 < 15 6/14/2022 < 16 7/14/2022 < 17 10/6/2022 < 18 1/10/2023 < 19 4/24/2023 < 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 Use "PASTE SPECIAL Lead Values" then "COPY" Maximum data points = 58 BDL=1/2DL Results 5 2.5 Std Dev. 5 2.5 Mean 5 2.5 C.V. 5 2.5 n 5 2.5 5 2.5 Mult Factor = 5 2.5 Max. Value 5 2.5 Max. Pred Cw 5 5 5 2.5 5 2.5 5 2.5 5 2.5 5 2.5 2 1 5 2.5 5 2.5 5 2.5 5 2.5 0.6851 2.5526 0.2684 19 1.17 5.000 ug/L 5.850 ug/L M 24236 RPA, data 8/16/2023 REASONABLE POTENTIAL ANALYSIS Par16 Date Data 1 1 /8/2019 < 2 4/9/2019 < 3 7/9/2019 < 4 10/8/2019 < 5 1 /7/2020 < 6 4/7/2020 < 7 7/14/2020 < 8 10/6/2020 < 9 1/12/2021 < 10 4/13/2021 < 11 7/13/2021 < 12 10/5/2021 < 13 1 /20/2022 < 14 4/5/2022 < 15 7/14/2022 < 16 10/6/2022 < 17 1/10/2023 < 18 4/24/2023 < 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 Molybdenum BDL=1/2DL Results 10 5 Std Dev. 10 5 Mean 10 5 C.V. 10 5 n 10 5 10 5 Mult Factor = 10 5 Max. Value 10 5 Max. Pred Cw 10 5 10 5 10 5 10 5 10 5 10 5 10 5 10 5 10 5 10 5 Use "PASTE SPECIAL Values" then "COPY" Maximum data points = 58 0.0000 5.0000 0.0000 18 1.00 5.0 ug/L 5.0 ug/L Par17 & Par18 Date Data 1 1 /8/2019 < 2 4/9/2019 < 3 7/9/2019 < 4 10/8/2019 < 5 1 /7/2020 < 6 4/7/2020 < 7 7/14/2020 < 8 10/6/2020 < 9 1/12/2021 < 10 4/13/2021 < 11 7/13/2021 < 12 10/5/2021 < 13 1 /20/2022 < 14 4/5/2022 < 15 6/14/2022 16 7/14/2022 < 17 10/6/2022 < 18 1/10/2023 < 19 4/24/2023 < 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 Nickel BDL=1/2DL Results 10 5 Std Dev. 10 5 Mean 10 5 C.V. 10 5 n 10 5 10 5 Mult Factor = 10 5 Max. Value 10 5 Max. Pred Cw 10 5 10 5 10 5 10 5 10 5 10 5 2 2 10 5 10 5 10 5 10 5 Use"PASTE SPECIAL - Values" then "COPY". Maximum data points = 58 0.6882 4.8421 0.1421 19 1.09 5.0 pg/L 5.5 pg/L 24236 RPA, data -7- 8/16/2023 REASONABLE POTENTIAL ANALYSIS Par19 Date Data 1 1 /8/2019 < 2 4/9/2019 < 3 7/9/2019 < 4 10/8/2019 < 5 1 /7/2020 < 6 4/7/2020 < 7 7/14/2020 < 8 10/6/2020 < 9 1/12/2021 < 10 4/13/2021 < 11 7/13/2021 < 12 10/5/2021 < 13 1 /20/2022 < 14 4/5/2022 < 15 6/14/2022 < 16 7/14/2022 < 17 10/6/2022 < 18 1/10/2023 < 19 4/24/2023 < 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 Par20 Use "PASTE SPECIAL - Selenium Values" then "COPY' . Maximum data points = 58 BDL=1/2DL Results 10 5 Std Dev. 10 5 Mean 10 5 C.V. 10 5 n 10 5 10 5 Mult Factor = 10 5 Max. Value 10 5 Max. Pred Cw 10 5 10 5 10 5 10 5 10 5 10 5 1 0.5 10 5 10 5 10 5 10 5 1.0324 4.7632 0.2167 19 1.13 5.0 ug/L 5.7 ug/L Date Data 1 1 /8/2019 < 2 4/9/2019 < 3 7/9/2019 < 4 10/8/2019 < 5 1 /7/2020 < 6 4/7/2020 < 7 7/14/2020 < 8 10/6/2020 < 9 1/12/2021 < 10 4/13/2021 < 11 7/13/2021 < 12 10/5/2021 < 13 1 /20/2022 < 14 4/5/2022 < 15 6/14/2022 < 16 7/14/2022 < 17 10/6/2022 < 18 1/10/2023 < 19 4/24/2023 < 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 Use "PASTE SPECIAL Silver Values" then "COPY" Maximum data points = 58 BDL=1/2DL Results 1 0.5 Std Dev. 1 0.5 Mean 1 0.5 C.V. 1 0.5 n 1 0.5 1 0.5 Mult Factor = 1 0.5 Max. Value 1 0.5 Max. Pred Cw 1 0.5 1 0.5 1 0.5 1 0.5 1 0.5 1 0.5 1 0.5 1 0.5 1 0.5 1 0.5 1 0.5 0.0000 0.5000 0.0000 19 1.00 0.500 ug/L 0.500 ug/L 24236 RPA, data 8/16/2023 REASONABLE POTENTIAL ANALYSIS Par21 Use "PASTE SPECIAL Zinc Values" then "COPY" Maximum data points = 58 Date Data BDL=1/2DL Results 1 1 /8/2019 21 21 Std Dev. 9.8391 2 4/9/2019 30 30 Mean 33.1579 3 7/9/2019 28 28 C.V. 0.2967 4 10/8/2019 13 13 n 19 5 1 /7/2020 42 42 6 4/7/2020 31 31 Mult Factor = 1.19 7 7/14/2020 26 26 Max. Value 50.0 ug/L 8 10/6/2020 29 29 Max. Pred Cw 59.5 ug/L 9 1/12/2021 25 25 10 4/13/2021 27 27 11 7/13/2021 30 30 12 10/5/2021 44 44 13 1 /20/2022 34 34 14 4/5/2022 50 50 15 6/14/2022 48 48 16 7/14/2022 30 30 17 10/6/2022 34 34 18 1/10/2023 47 47 19 4/24/2023 41 41 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 24236 RPA, data - 9 - 8/16/2023 Johnnie Mosely Regional WRF Outfall 001 NCO024236 Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators MAXIMUM DATA POINTS = 58 Qw (MGD) = 11.8500 1Q10S (cfs) = 229.33 7Q10S (cfs) = 283.00 7Q10W (cfs) = 292.00 30Q2 (cfs) = 572.00 Avg. Stream Flow, QA (cfs) = 1514.00 Receiving Stream: Neuse River HUC 03020202 WWTP/WTP Class: IV IWC% @ 1Q10S = 7.415294866 IWC% @ 7Q10S = 6.094718243 IWC% @ 7Q10W = 5.917984325 IWC% @ 30Q2 = 3.111197686 IW%C @ QA = 1.198635445 Stream Class: C;NSW Qw = 11.85 MGD COMBINED HARDNESS (mg/L) Acute = 38.78 mg/L Chronic = 3 8.5 9 mg/L PARAMETER NC STANDARDS OR EPA CRITERIA CO)REASONABLE POTENTIAL RESULTS RECOMMENDED ACTION TYPE J CY D Applied Chronic Acute n # Det. Max Pred Cw Allowable Cw Standard Acute (FW): 4,585.1 Arsenic C 150 FW(7QIOs) 340 ug/L 19 0 2.7 Chronic (FW): 2,461.1 No RP, Predicted Max < 50% of Allowable Cw - No Max MDL5 Monitoring required Arsenic C 10 HH/WS(Qavg) ug/L NO DETECTS _= Chronic (HH): 834.3 Max MDL 5 Acute: 876.57 Beryllium NC 6.5 FW(7QIOs) 65 ug/L 3 0 1.50 Note: n < 9 C.V. (default) _ Chronic 106.65 No RP, Predicted Max < 50% of Allowable Cw - No Limited data set NO DETECTS Max MDL = l Monitoring required Acute: 64.089 Cadmium NC 0.8191 FW(7QIOs) 4.7524 ug/L 19 0 0.535 _ Chronic: 13.439 _ No RP, Predicted Max -< 50% of Allowable Cw - No NO DETECTS Max MDL = 1 Monitoring required Acute: NO WQS Chlorides NC 230 FW(7QIOs) mg/L 18 18 1,297.2 ----------------------------------------------- Chronic: 3,773.8 No RP, Predicted Max < 50% of Allowable Cw - No No value > Allowable Cw Monitoring required Acute: NO WQS Total Phenolic Compounds NC 300 A(30Q2) ug/L 3 0 30.0 Note: n < 9 C.V. (default) _ Chronic 9,642.6 No RP, Predicted Max < 50% of Allowable Cw - No Limited data set NO DETECTS Max MDL 20 Monitoring required Acute: 17,486.0 Chromium III NC 168.00 FW(7QIOs) 1296.64 µg/L 0 0 N/A Chronic: ---- 2 756.4 - ----------------------------- Acute: 215.8 Chromium VI NC 11 FW(7QIOs) 16 µg/L 0 0 N/A Chronic----- 180.5-- ----------------------------- a: No monitoring required if all Total Chromium Chromium, Total NC µg/L 19 0 2.5 Max reported value = 2.5 samples are < 5 pg/L or Pred. max for Total Cr is < allowable Cw for Cr VI. NO DETECTS Max MDL = 5 Acute: 213.56 Copper NC 11.4198 FW(7QIOs) 15.8360 ug/L 19 7 3.90 Chronic:187.37 No RP, Predicted Max < 50% of Allowable Cw - No No value > Allowable Cw Monitoring required Acute: 296.7 Cyanide NC 5 FW(701 Os) 22 10 u2/L 19 0 5.0 _ _ _ _ _ _ _ _ Chronic 82.0 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ No RP, Predicted Max < 50% of Allowable Cw - No NO DETECTS Max MDL 10 Monitoring required 24236 RPA, rpa Page 1 of 2 8/16/2023 Johnnie Mosely Regional WRF Outfall 001 NCO024236 Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators Qw = 11.85 MGD Acute: 1,665.357 Lead NC 4.7863 FW(7Q10s) 123.4911 ug/L 19 1 5.850 Chronic: 78.531 No RP, Predicted Max < 50% of Allowable Cw - No No value > Allowable Cw Monitoring required Acute (FW): 6,553.4 Nickel NC 53.7528 FW(7Q10s) 485.9509 µg/L 19 1 5.5 Chronic (FW): 882.0 No RP, Predicted Max < 50% of Allowable Cw - No No value > Allowable Cw Monitoring required Nickel NC 25.0000 WS(7Q10s) µg/L Chronic (WS): 410.2 No value > Allowable Cw Acute: 755.2 Selenium NC 5 FW(7Q10s) 56 ug/L 19 0 5.7 Chronic:82.0 No RP, Predicted Max < 50% of Allowable Cw - No NO DETECTS Max MDL = 10 Monitoring required Acute: 8.504 Silver NC 0.06 FW(7Q10s) 0.6306 ug/L 19 0 0.500 _ _ _ Chronic: 0.984 No RP, All values non -detect < 1 ug/L; No -monitoring - NO DETECTS Max MDL = 1 required Acute: 2,459.0 No RP, Predicted Max < 50% of Allowable Cw - No Zinc NC 183.0751 FW(7Q10s) 182.3384 ug/L 19 19 59.5 Monitoring required ----- - - - Chronic 3, ----------------------------- No value > Allowable Cw 24236 RPA, rpa Page 2 of 2 8/16/2023 Permit No. NCO024236 NPDES Implementation of Instream Dissolved Metals Standards - Freshwater Standards The NC 2007-2015 Water Quality Standard (WQS) Triennial Review was approved by the NC Environmental Management Commission (EMC) on November 13, 2014. The US EPA subsequently approved the WQS revisions on April 6, 2016, with some exceptions. Therefore, metal limits in draft permits out to public notice after April 6, 2016 must be calculated to protect the new standards - as approved. Table 1. NC Dissolved Metals Water Q ality Standards/A uatic Life Protection Parameter Acute FW, µg/l (Dissolved) Chronic FW, µg/l (Dissolved) Acute SW, µg/1 (Dissolved) Chronic SW, µg/1 (Dissolved) Arsenic 340 150 69 36 Beryllium 65 6.5 --- --- Cadmium Calculation Calculation 40 8.8 Chromium III Calculation Calculation --- --- Chromium VI 16 11 1100 50 Copper Calculation Calculation 4.8 3.1 Lead Calculation Calculation 210 8.1 Nickel Calculation Calculation 74 8.2 Silver Calculation 0.06 1.9 0.1 Zinc Calculation Calculation 90 81 Table 1 Notes: 1. FW= Freshwater, SW= Saltwater 2. Calculation = Hardness dependent standard 3. Only the aquatic life standards listed above are expressed in dissolved form. Aquatic life standards for Mercury and selenium are still expressed as Total Recoverable Metals due to bioaccumulative concerns (as are all human health standards for all metals). It is still necessary to evaluate total recoverable aquatic life and human health standards listed in 15A NCAC 2B.0200 (e.g., arsenic at 10 µg/1 for human health protection; cyanide at 5 µg/L and fluoride at 1.8 mg/L for aquatic life protection). Table 2. Dissolved Freshwater Standards for Hardness -Dependent Metals The Water Effects Ratio (WER) is equal to one unless determined otherwise under 15A NCAC 02B .0211 Subparagraph (11)(d) Metal NC Dissolved Standard, µg/I Cadmium, Acute WER* {1. 136672-[ln hardness](0.041838)} e^10.9151 [ln hardness]-3.1485} Cadmium, Acute Trout waters WER* {1. 136672-[ln hardness](0.041838)} e^{0.9151[In hardness]-3.62361 Cadmium, Chronic WER*{1.101672-[ln hardness](0.041838)} • e^{0.7998[ln hardness] -4.445 11 Chromium III, Acute WER*0.316 e^{0.8190[ln hardness]+3.7256} Chromium III, Chronic WER*0.860 e^{0.8190[ln hardness]+0.6848} Copper, Acute WER*0.960 e^{0.9422[ln hardness]-1.700} Copper, Chronic WER*0.960 e^{0.8545[ln hardness]-1.702} Lead, Acute WER*{1.46203-[ln hardness](0.145712)} • e^{1.273[ln hardness]-1.460} Lead, Chronic WER*{1.46203-[ln hardness](0.145712)} • e^{1.273[ln hardness]-4.705) Nickel, Acute WER*0.998 e^{0.8460[ln hardness]+2.255} Nickel, Chronic WER*0.997 e^{0.8460[ln hardness]+0.0584} Page 1 of 4 Permit No. NCO024236 Silver, Acute WER*0.85 • e"O.72[ln hardness]-6.59} Silver, Chronic Not applicable Zinc, Acute WER*0.978 e^{0.8473[ln hardness]+0.884} Zinc, Chronic WER*0.986 e^{0.8473[ln hardness]+0.884} General Information on the Reasonable Potential Analysis (RPA) The RPA process itself did not change as the result of the new metals standards. However, application of the dissolved and hardness -dependent standards requires additional consideration in order to establish the numeric standard for each metal of concern of each individual discharge. The hardness -based standards require some knowledge of the effluent and instream (upstream) hardness and so must be calculated case -by -case for each discharge. Metals limits must be expressed as `total recoverable' metals in accordance with 40 CFR 122.45(c). The discharge -specific standards must be converted to the equivalent total values for use in the RPA calculations. We will generally rely on default translator values developed for each metal (more on that below), but it is also possible to consider case -specific translators developed in accordance with established methodology. RPA Permitting Guidance/WOBELs for Hardness -Dependent Metals - Freshwater The RPA is designed to predict the maximum likely effluent concentrations for each metal of concern, based on recent effluent data, and calculate the allowable effluent concentrations, based on applicable standards and the critical low -flow values for the receiving stream. If the maximum predicted value is greater than the maximum allowed value (chronic or acute), the discharge has reasonable potential to exceed the standard, which warrants a permit limit in most cases. If monitoring for a particular pollutant indicates that the pollutant is not present (i.e. consistently below detection level), then the Division may remove the monitoring requirement in the reissued permit. To perform a RPA on the Freshwater hardness -dependent metals the Permit Writer compiles the following information: • Critical low flow of the receiving stream, 7Q10 (the spreadsheet automatically calculates the 1 Q 10 using the formula 1 Q 10 = 0.843 (s7Q 10, cfs) 0.993 • Effluent hardness and upstream hardness, site -specific data is preferred • Permitted flow • Receiving stream classification 2. In order to establish the numeric standard for each hardness -dependent metal of concern and for each individual discharge, the Permit Writer must first determine what effluent and instream (upstream) hardness values to use in the equations. The permit writer reviews DMR's, Effluent Pollutant Scans, and Toxicity Test results for any hardness data and contacts the Permittee to see if any additional data is available for instream hardness values, upstream of the discharge. If no hardness data is available, the permit writer may choose to do an initial evaluation using a default hardness of 25 mg/L (CaCO3 or (Ca + Mg)). Minimum and maximum limits on the hardness value used for water quality calculations are 25 mg/L and 400 mg/L, respectively. If the use of a default hardness value results in a hardness -dependent metal showing reasonable potential, the permit writer contacts the Permittee and requests 5 site -specific effluent and upstream hardness samples over a period of one week. The RPA is rerun using the new data. Page 2 of 4 Permit No. NCO024236 The overall hardness value used in the water quality calculations is calculated as follows: Combined Hardness (chronic) _ (Permitted Flow, cfs *Avg. Effluent Hardness, mg/L)+s7Q10, cfs *Avg. Upstream Hardness, mg/L) (Permitted Flow, cfs + s7Q 10, cfs) The Combined Hardness for acute is the same but the calculation uses the IQ 10 flow. 3. The permit writer converts the numeric standard for each metal of concern to a total recoverable metal, using the EPA Default Partition Coefficients (DPCs) or site -specific translators, if any have been developed using federally approved methodology. EPA default partition coefficients or the "Fraction Dissolved" converts the value for dissolved metal at laboratory conditions to total recoverable metal at in -stream ambient conditions. This factor is calculated using the linear partition coefficients found in The Metals Translator: Guidance for Calculating a Total Recoverable Permit Limit from a Dissolved Criterion (EPA 823-B-96-007, June 1996) and the equation: Cdiss = 1 Ctotal I + { [Kp.] [ss('+a)] [10 6] } Where: ss = in -stream suspended solids concentration [mg/1], minimum of 10 mg/L used, and Kpo and a = constants that express the equilibrium relationship between dissolved and adsorbed forms of metals. A list of constants used for each hardness -dependent metal can also be found in the RPA program under a sheet labeled DPCs. 4. The numeric standard for each metal of concern is divided by the default partition coefficient (or site -specific translator) to obtain a Total Recoverable Metal at ambient conditions. In some cases, where an EPA default partition coefficient translator does not exist (ie. silver), the dissolved numeric standard for each metal of concern is divided by the EPA conversion factor to obtain a Total Recoverable Metal at ambient conditions. This method presumes that the metal is dissolved to the same extent as it was during EPA's criteria development for metals. For more information on conversion factors see the June, 1996 EPA Translator Guidance Document. 5. The RPA spreadsheet uses a mass balance equation to determine the total allowable concentration (permit limits) for each pollutant using the following equation: Ca = (s7Q 10 + Qw) (Cwgs) — (s7Q10) (Cb) Qw Where: Ca = allowable effluent concentration (µg/L or mg/L) Cwqs = NC Water Quality Standard or federal criteria (µg/L or mg/L) Cb = background concentration: assume zero for all toxicants except NH3* (µg/L or mg/L) Qw = permitted effluent flow (cfs, match s7Q 10) s7Q 10 = summer low flow used to protect aquatic life from chronic toxicity and human health through the consumption of water, fish, and shellfish from noncarcinogens (cfs) * Discussions are on -going with EPA on how best to address background concentrations Flows other than s7Q 10 may be incorporated as applicable: IQ 10 = used in the equation to protect aquatic life from acute toxicity Page 3 of 4 Permit No. NC0024236 QA = used in the equation to protect human health through the consumption of water, fish, and shellfish from carcinogens 30Q2 = used in the equation to protect aesthetic quality 6. The permit writer enters the most recent 2-3 years of effluent data for each pollutant of concern. Data entered must have been taken within four and one-half years prior to the date of the permit application (40 CFR 122.21). The RPA spreadsheet estimates the 95th percentile upper concentration of each pollutant. The Predicted Max concentrations are compared to the Total allowable concentrations to determine if a permit limit is necessary. If the predicted max exceeds the acute or chronic Total allowable concentrations, the discharge is considered to show reasonable potential to violate the water quality standard, and a permit limit (Total allowable concentration) is included in the permit in accordance with the U.S. EPA Technical Support Document for Water Quality -Based Toxics Control published in 1991. 7. When appropriate, permit writers develop facility specific compliance schedules in accordance with the EPA Headquarters Memo dated May 10, 2007 from James Hanlon to Alexis Strauss on 40 CFR 122.47 Compliance Schedule Requirements. The Total Chromium NC WQS was removed and replaced with trivalent chromium and hexavalent chromium Water Quality Standards. As a cost savings measure, total chromium data results may be used as a conservative surrogate in cases where there are no analytical results based on chromium III or VI. In these cases, the projected maximum concentration (95th %) for total chromium will be compared against water quality standards for chromium III and chromium VI. 9. Effluent hardness sampling and instream hardness sampling, upstream of the discharge, are inserted into all permits with facilities monitoring for hardness -dependent metals to ensure the accuracy of the permit limits and to build a more robust hardness dataset. 10. Hardness and flow values used in the Reasonable Potential Analysis for this permit included: Parameter Value Comments (Data Source) Average Effluent Hardness (mg/L) [Total as, CaCO3 or (Ca+Mg)] 51.95 Average from DMR review for data from January 2019 — June 2023 Average Upstream Hardness (mg/L) [Total as, CaCO3 or (Ca+Mg)] 37.72 Average from DMR review for data from January 2019 — June 2023 7Q 10 summer (cfs) 283 Historical file; previous fact sheet IQIO (cfs) 229.33 Calculated in RPA Permitted Flow (MGD) 11.85 NPDES Files Date: 8/17/2023 Permit Writer: Nick Coco Page 4 of 4 NH3/TRC WLA Calculations Facility: Johnnie Mosely Regional WRF PermitNo. NC0024236 Prepared By: Nick Coco Enter Design Flow (MGD): 11.85 Enter s7Q10 (cfs): 283 Enter w7Q10 (cfs): 292 Total Residual Chlorine (TRC) Daily Maximum Limit (ug/1) Ammonia (Summer) Monthly Average Limit (mg NH3-N/1) s7Q10 (CFS) 283 s7Q10 (CFS) 283 DESIGN FLOW (MGD) 11.85 DESIGN FLOW (MGD) 11.85 DESIGN FLOW (CFS) 18.3675 DESIGN FLOW (CFS) 18.3675 STREAM STD (UG/L) 17.0 STREAM STD (MG/L) 1.0 Upstream Bkgd (ug/1) 0 Upstream Bkgd (mg/1) 0.22 IWC (%) 6.09 IWC (%) 6.09 Allowable Conc. (ug/1) 279 Allowable Conc. (mg/1) 13.0 Cap at 28 uq/L. Consistent with current limit. Less stringent than limit. Maintain Maintain limit. Ammonia (Winter) Monthly Average Limit (mg NH3-N/1) Fecal Coliform w7Q10 (CFS) 292 Monthly Average Limit: 200/100mI DESIGN FLOW (MGD) 11.85 (If DF >331; Monitor) DESIGN FLOW (CFS) 18.3675 (If DF<331; Limit) STREAM STD (MG/L) 1.8 Dilution Factor (DF) 16.41 Upstream Bkgd (mg/1) 0.22 IWC (%) 5.92 Allowable Conc. (mg/1) 26.9 Less stringent than limit. Maintain Total Residual Chlorine 1. Cap Daily Max limit at 28 ug/I to protect for acute toxicity Ammonia (as NH3-N) 1. If Allowable Conc > 35 mg/I, Monitor Only 2. Monthly Avg limit x 3 = Weekly Avg limit (Municipals) 3. Monthly Avg limit x 5 = Daily Max limit (Non-Munis) If the allowable ammonia concentration is > 35 mg/L, no limit shall be imposed Fecal Coliform 1. Monthly Avg limit x 2 = 400/100 ml = Weekly Avg limit (Municipals) = Daily Max limit (Non -Muni) 8/16/23 WQS = 12 ng/L Facility Name Johnnie Mosely Regional WRF/NC0024236 /Permit No. Total Mercury 1631E PQL = 0.5 ng/L Date Modifier Data Entry Value MERCURY WQBEL/TBEL EVALUATION V:2013-6 No Limit Required No MMP Required 7Q10s = 283.000 cfs WQBEL = 196.89 ng/L Permitted Flow = 11.850 47 ng/L 1/8/19 < 1 0.5 4/9/19 < 1 0.5 7/9/19 < 1 0.5 10/28/19 < 1 0.5 0.5 ng/L - Annual Average for 2019 1/7/20 < 1 0.5 4/7/20 < 1 0.5 7/14/20 < 1 0.5 10/6/20 < 1 0.5 0.5 ng/L - Annual Average for 2020 1/12/21 < 1 0.5 4/13/21 < 1 0.5 7/13/21 < 1 0.5 10/5/21 < 1 0.5 0.5 ng/L - Annual Average for 2021 1/20/22 < 1 0.5 4/5/22 < 1 0.5 6/14/22 < 1 0.5 7/28/22 < 1 0.5 10/6/22 < 1 0.5 0.5 ng/L - Annual Average for 2022 1/10/23 < 1 0.5 4/24/23 < 1 0.5 0.5 ng/L - Annual Average for 2023 Johnnie Mosely Regional WRF/NC0024236 Mercury Data Statistics (Method 1631E) 2019 2020 2021 2022 # of Samples 4 4 4 5 Annual Average, ng/L 0.5 0.5 0.5 0.50 Maximum Value, ng/L 0.50 0.50 0.50 0.5 TBEL, ng/L 47 WQBEL, ng/L 196.9 2023 0.5 0.5 NCO024236 Johnnie Mosely Regional WRF BOD monthly removal rate Month January-19 February-19 March-19 April-19 May-19 June-19 July-19 August-19 September-19 October-19 November-19 December-19 January-20 February-20 March-20 April-20 May-20 June-20 July-20 August-20 September-20 October-20 November-20 December-20 January-21 February-21 March-21 April-21 May-21 June-21 RR (%) 98.92 98.98 93.69 98.71 99.02 99.08 98.99 99.25 99.04 99.23 98.87 99.13 98.95 98.49 98.68 98.65 99.10 98.05 98.98 97.11 98.89 99.20 98.18 98.92 97.21 96.32 98.32 98.88 99.28 99.14 Month July-21 August-21 September-21 October-21 November-21 December-21 January-22 February-22 March-22 April-22 May-22 June-22 July-22 August-22 September-22 October-22 November-22 December-22 January-23 February-23 March-23 April-23 May-23 June-23 July-23 August-23 September-23 October-23 November-23 December-23 Overall BOD removal rate RR (%) 99.28 94.56 99.29 99.34 99.07 99.04 98.52 98.86 99.16 99.03 99.23 99.25 99.19 99.05 99.00 99.25 99.27 99.39 99.39 98.59 99.32 97.71 98.97 99.17 98.66 8/17/2023 TSS monthly removal rate Month January-19 February-19 March-19 April-19 May-19 June-19 July-19 August-19 September-19 October-19 November-19 December-19 January-20 February-20 March-20 Apri I-20 May-20 June-20 July-20 August-20 September-20 October-20 November-20 December-20 January-21 February-21 March-21 April-21 May-21 June-21 RR (%) 97.53 98.03 0.00 97.55 98.42 98.33 98.70 98.40 98.48 98.55 98.66 98.55 98.77 0.00 98.38 98.65 98.59 94.64 97.97 53.37 97.81 98.28 78.73 98.43 22.18 75.95 96.13 98.31 99.13 97.77 Month July-21 August-21 September-21 October-21 November-21 December-21 January-22 February-22 March-22 April-22 May-22 June-22 July-22 August-22 September-22 October-22 November-22 December-22 January-23 February-23 March-23 April-23 May-23 June-23 July-23 August-23 September-23 October-23 November-23 December-23 Overall TSS removal rate RR (%) 98.52 22.17 97.18 98.05 97.90 98.68 89.34 95.74 98.27 98.92 98.53 98.55 98.49 98.52 98.75 99.57 98.67 98.59 98.82 47.83 98.63 89.01 98.74 98.68 88.52 EPA Identification Number NPNES Number Facility Name 7outfall Number Johnnie Mosley Regional WRF 1 Estimated Concentration (if. : Reason Pollutant Believed Present lm Nscharge Known) Pollutant(Required) :' NCO024236 Method Number CAS number: WA liable) NA NA NA NA NA e�ugr MONITORING REPORT(MR) VIOLATIONS for: Permit: NCO024236 MRS Betweei 8 - 2018 and 8 - 2023 Region: % Facility Name: % Param Nam(% County: % Major Minor: % Report Date: 08/15/22 Page 1 of 3 Violation Category:Limit Violation Program Category: Subbasin: % Violation Action: % PERMIT: NCO024236 FACILITY: City of Kinston - Johnnie Mosley Regional WRF COUNTY: Lenoir REGION: Washington Limit Violation MONITORING VIOLATION UNIT OF CALCULATED % REPORT OUTFALL LOCATION PARAMETER DATE FREQUENCY MEASURE LIMIT VALUE Over VIOLATION TYPE VIOLATION ACTION 03 - 2019 001 Effluent BOD, 5-Day (20 Deg. C) - 03/09/19 5 X week mg/I 15 29.28 95.2 Weekly Average Proceed to Concentration Exceeded Enforcement Case 06 - 2020 001 Effluent BOD, 5-Day (20 Deg. C) - 06/20/20 5 X week mg/I 7.5 8.82 17.6 Weekly Average Proceed to NOV Concentration Exceeded 08 - 2021 001 Effluent BOD, 5-Day (20 Deg. C) - 08/07/21 5 X week mg/I 7.5 30.74 309.9 Weekly Average Proceed to Concentration Exceeded Enforcement Case 08 - 2021 001 Effluent BOD, 5-Day (20 Deg. C) - 08/31/21 5 X week mg/I 5 6.99 39.7 Monthly Average Proceed to Concentration Exceeded Enforcement Case 04 - 2023 001 Effluent BOD, 5-Day (20 Deg. C) - 04/15/23 5 X week mg/I 7.5 7.66 2.1 Weekly Average Proceed to NOV Concentration Exceeded 02-2021 001 Effluent Coliform, Fecal MF, MFC 02/20/21 5 X week #/100ml 400 480.9 20.2 Weekly Geometric Mean Proceed to Broth, 44.5 C Exceeded Enforcement Case 04-2021 001 Effluent Coliform, Fecal MF, MFC 04/03/21 5 X week #/100ml 400 989.16 147.3 Weekly Geometric Mean Proceed to Broth, 44.5 C Exceeded Enforcement Case 09-2018 001 Effluent Oxygen, Dissolved (DO) 09/25/18 5 X week mg/I 6 5.9 1.7 Daily Minimum Not No Action, BPJ Reached 06-2023 001 Effluent Oxygen, Dissolved (DO) 06/28/23 5 X week mg/I 6 2.36 60.7 Daily Minimum Not None Reached 02-2021 001 Effluent pH 02/17/21 5 X week su 6 5.75 4.2 Daily Minimum Not Proceed to Reached Enforcement Case 02-2021 001 Effluent pH 02/24/21 5 X week su 6 5.82 3.0 Daily Minimum Not Proceed to Reached Enforcement Case 03 - 2021 001 Effluent Phosphorus, Total (as P) - 03/31 /21 Weekly mg/I 2 2.36 18.2 Quarterly Average Proceed to NOV Concentration Exceeded 03 - 2019 001 Effluent Solids, Total Suspended - 03/09/19 5 X week mg/I 45 2,564 5,597.8 Weekly Average Proceed to Concentration Exceeded Enforcement Case 03-2019 001 Effluent Solids, Total Suspended - 03/31/19 5 X week mg/I 30 610.84 1,936.1 Monthly Average Proceed to Concentration Exceeded Enforcement Case 02 - 2020 001 Effluent Solids, Total Suspended - 02/08/20 5 X week mg/I 45 1,375.1 2,955.8 Weekly Average Proceed to Concentration Exceeded Enforcement Case MONITORING REPORT(MR) VIOLATIONS for: Permit: NCO024236 MRS Betweel 8 - 2018 and 8 - 2023 Region: % Facility Name: % Param Nam(% County: % Major Minor: % Report Date: 08/15/2� Page 2 of 3 Violation Category:Limit Violation Program Category: % Subbasin: % Violation Action: % PERMIT: NCO024236 FACILITY: City of Kinston - Johnnie Mosley Regional WRF COUNTY: Lenoir REGION: Washington Limit Violation MONITORING VIOLATION UNIT OF CALCULATED % REPORT OUTFALL LOCATION PARAMETER DATE FREQUENCY MEASURE LIMIT VALUE Over VIOLATION TYPE VIOLATION ACTION 02 - 2020 001 Effluent Solids, Total Suspended - 02/29/20 5 X week mg/I 30 393.06 1,210.2 Monthly Average Proceed to Concentration Exceeded Enforcement Case 08 - 2020 001 Effluent Solids, Total Suspended - 08/08/20 5 X week mg/I 45 191.12 324.7 Weekly Average Proceed to NOV Concentration Exceeded 08 - 2020 001 Effluent Solids, Total Suspended - 08/15/20 5 X week mg/I 45 91.22 102.7 Weekly Average Proceed to NOV Concentration Exceeded 08 - 2020 001 Effluent Solids, Total Suspended - 08/31 /20 5 X week mg/I 30 67.36 124.5 Monthly Average Proceed to NOV Concentration Exceeded 11 -2020 001 Effluent Solids, Total Suspended - 11/14/20 5 X week mg/I 45 120.43 167.6 Weekly Average Proceed to Concentration Exceeded Enforcement Case 11 -2020 001 Effluent Solids, Total Suspended - 11/30/20 5 X week mg/I 30 32.61 8.7 Monthly Average Proceed to Concentration Exceeded Enforcement Case 01 -2021 001 Effluent Solids, Total Suspended - 01/02/21 5 X week mg/I 45 222.68 394.8 Weekly Average Proceed to Concentration Exceeded Enforcement Case 01 -2021 001 Effluent Solids, Total Suspended - 01/30/21 5 X week mg/I 45 80.08 78.0 Weekly Average Proceed to Concentration Exceeded Enforcement Case 01 -2021 001 Effluent Solids, Total Suspended - 01/31/21 5 X week mg/I 30 68.76 129.2 Monthly Average Proceed to Concentration Exceeded Enforcement Case 02 - 2021 001 Effluent Solids, Total Suspended - 02/20/21 5 X week mg/I 45 112.77 150.6 Weekly Average Proceed to Concentration Exceeded Enforcement Case 02 - 2021 001 Effluent Solids, Total Suspended - 02/28/21 5 X week mg/I 30 40.55 35.2 Monthly Average Proceed to Concentration Exceeded Enforcement Case 08 - 2021 001 Effluent Solids, Total Suspended - 08/07/21 5 X week mg/I 45 216.76 381.7 Weekly Average Proceed to Concentration Exceeded Enforcement Case 08 - 2021 001 Effluent Solids, Total Suspended - 08/31 /21 5 X week mg/I 30 49.26 64.2 Monthly Average Proceed to Concentration Exceeded Enforcement Case 01 -2022 001 Effluent Solids, Total Suspended - 01/08/22 5 X week mg/I 45 88.05 95.7 Weekly Average Proceed to Concentration Exceeded Enforcement Case 02 - 2023 001 Effluent Solids, Total Suspended - 02/18/23 5 X week mg/I 45 439.63 877.0 Weekly Average Proceed to Concentration Exceeded Enforcement Case 02 - 2023 001 Effluent Solids, Total Suspended - 02/28/23 5 X week mg/I 30 125.61 318.7 Monthly Average Proceed to Concentration Exceeded Enforcement Case MONITORING REPORT(MR) VIOLATIONS for: Permit: NCO024236 MRS Betweei 8 - 2018 and 8 - 2023 Region: % Facility Name: % Param Nam(% County: % Major Minor: % Report Date: 08/15/22 Page 3 of 3 Violation Category:Limit Violation Program Category: 0a Subbasin: % Violation Action: PERMIT: NCO024236 FACILITY: City of Kinston - Johnnie Mosley Regional WRF COUNTY: Lenoir REGION: Washington Limit Violation MONITORING VIOLATION UNIT OF CALCULATED % REPORT OUTFALL LOCATION PARAMETER DATE FREQUENCY MEASURE LIMIT VALUE Over VIOLATION TYPE VIOLATION ACTION 04-2023 001 Effluent Solids, Total Suspended - 04/15/23 5 X week mg/I 45 49.45 9.9 Weekly Average Proceed to NOV Concentration Exceeded Whole Effluent Toxicity Testing and Self Monitoring Summary Kinder Morgan Southeast Terminals LLC NCO042501/001 County: Guilford Region: WSRO Basin: CPF08 Jan Apr Jul Oct Fthd24PF Begin: 4/1/2022 Acu Fthd 24hr PF Lim NonComp: 7Q10: 0.0 PF: VAR IWC: 100 Freq: Q J F M A M J J A S O 2019 Pass - - - - - - - - - 2019 >100 - - - - - - - - - 2019 >100 - - - - - - - - - 2020 Pass - - - - - - - - - 2020 >100 - - - - - - - - - 2021 >100 - - - - - - - - - 2021 Pass - - - - - - - - - 2021 >100 - - - - - - - - - 2022 - Pass - Pass - - Pass - - Pass 2022 >100 - - - - - - - - - 2022 >100 - - - - - - - - - 2023 - >100 - - - - - - - - 2023 H Pass - Pass - - - - - - 2023 - >100 - - - - - - - - Kings Mountain, City of- Ellison WTP NCO079740/001 County: Cleveland Region: MRO Basin: BRD05 Jan Apr Jul Oct Ceri7dPF Begin: 1/1/2019 Chr Monit: 3.45% NonComp: 7Q10: PF: IWC: Freq: Q J F M A M J J A S O 2019 Pass - - Pass - - - - Pass Pass 2020 Pass - - Pass - - Fail - - Pass 2021 Pass - - Pass - - Pass - - Pass 2022 Pass - - Pass - - Pass - - Pass 2023 Pass - - Pass - - - - - - Kings Mtn. - Pilot Cr. WWTP NCO020737/001 County: Cleveland Region: MRO Basin: BRD05 Jan Apr Jul Oct Ceri7dPF Begin: 6/1/2015 chr lim: 33% NonComp: Single 7Q10: 19.0 PF: 6.0 IWC: 33 Freq: Q J F M A M J J A S O 2019 Pass - - Pass - - Pass - - Pass 2020 Pass - - Pass - - Pass - - Pass 2021 Pass - - Pass - - Pass >100(P) - - Pass 2022 Pass - - Pass - - Pass >100(P) - - Pass 2023 Pass >100 - - Pass - - - - - - Kinston - Regional WRF NCO024236/001 County: Lenoir Region: WARO Basin: NEU05 Jan Apr Jul Oct Ceri7dPF Begin: 11/1/2018 Chr Lim: 6.1 NonComp: Single 7Q10: 0 PF: 11.85 IWC: 100 Freq: Q J F M A M J J A S O 2019 Pass - - Pass - - Pass - - Pass 2020 Pass - - Pass - - Pass - - Pass 2021 Pass - - Pass - - Pass - - Pass 2022 Pass xna cam« - >12(P) _ _ Pass cam« >10(P) >12(P) Pass - >12 Pass SOC JOC: N SOC JOC: N SOC JOC: N >100 Pass SOC JOC: N C C C foil Leeend: P= Fathead minnow (Pimohales oromelas). H=No Flow (facilitv is active). s = Solit test between Certified Labs Page 58 of 115 A B C D E I F I G I H I I I J K L M N O 1 P Pollutants of Concern (POC) Review Form Version:2022.09.28 1 2 1. Facility's General Information Date of (draft) Review 9/8/2023 c. POC review due to: e. Contact Information 3 4 Date of (final) Review Municipal NPDES renewal 0 Regional Office (RO) Washington 5 NPDES Permit Writer (pw) Nick Coco HWA-AT/LTMP Review El RO PT Staff Robbie Bullock RO NPDES Staff Robbie Bullock Perm ittee-Facility Name Johnnie Mosely Regional WRF New Industries ❑ Facility PT Staff, email Benlamin Overton, benlamin.overton(o)ci.kinston.nc.us 6 7 NPDES Permit Number NCO024236 WWTP expansion ❑ f. Receiving Stream 8 NPDES Permit Effective Date Stream reclass./adjustment ❑ Outfall Chemical Addendum Submittal D/6/2023 Outfall relocation/adjustment ❑ Receiving Stream: Neuse River QA, cfs: 1514 9 Date 10 NPDES Permit Public Notice Date 7Q10 update ❑ Stream Class C;NSW 7Q10 (S), cfs: 283 11 eDMR data evaluated from: 1/1/2019 to 6/30/2023 Other POC review trigger, explain: Oufall Lat. 35.17.15 Outfall Long. 77.30.41 12 a. WWTP Capacity Summary Outfall II 13 Current Permitted Flow, mgd 11.< Designed Flow, Receiving Stream: QA, cfs: 9 14 Permitted SIU Flow, mgd 1.2520 d. IU Summary Stream Class 7Q10, cfs: 15 b. PT Docs. Summary # IUs Oufall Lat. Outfall Long. 16 IWS approval date 6/2/2022 # SIUs Is there a PWS intake downstream of the Facility's Outfall(s)? ❑ YES 0 NO 17 L/STMP approval date: 12/3/2018 # CIUs Comments: 18 HWA-AT approval date 5/30/2018 # NSCIUs HWA due 4/1/2023 # IUs w/Local 7 Permits or Other 19 1 ITypes 20 F 2. Industrial Users' Information. 21 # Industrial User (IU) Name IU Activity IU Non Conventional Pollutans & Toxic Pollutant IUP Effective Date 22 1 ALSCO i-inen rentals pH, BOD, TSS, chromium, copper, lead, zinc, total phosphorous 12/31/2019 2 Crown Equipment Corporation Forklift BOD, TSS, pH, total phosphorous, cadmium, chromium, copper, cyanide, lead, nickel, silver, TTO 12/31/2019 manufacturing 23 40CFR 433 L 3 Domestic Fabrics and Blankets Corporation Textile BOD, TSS, pH, temperature 12/31/2019 24 Processing 4 Electrolux Major Appliances Dishwasher BOD, TSS, pH, total phosphorous, total nitrogen, cadmium, chromium, copper, cyanide, lead, nickel, silver, zinc, TTO 12/31/2019 manufacturing 40 25 e_ CFR 433 W5 Reco NC, LLC Dishwasher BOD, TSS, pH, total phosphorous, total nitrogen, ammonia, cadmium, chromium, copper, cyanide, lead, nickel, silver, zinc, TTO 6/10/2023 0 basket zmanufacturing 40 26 CFR 433 6 Smithfield Packaged Meats Corporation Meat BOD, TSS, pH, total phosphorous, oil & grease, total nitrogen 12/31/2021 Packing/Food 27 Processing 7 West Pharmaceutical Services Pharmaceutical BOD, TSS, pH, total phosphorous, copper, zinc, oil & grease, chlorine 12/31/2019 rubber device manufacturing 40 28 CFR 428.76 8 William Barnett & Son, LLC Staple Fiber BOD, TSS, pH, total phosphorous 12/31/2019 29 Processing 9 30 10 31 11 32 12 33 13 34 14 35 Comment: 40 41 3. Status of Pretreatment Program (check all that apply) 42 Status of Pretreatment Program (check all that apply) 43 ❑ 1) facility has no SIUs, does have Division approved Pretreatment Program that is INACTIVE 44 ❑ 2) facility has no SIU's, does not have Division approved Pretreatment Program 45 ❑ 3) facility has SIUs and DWQ approved Pretreatment Program 46 p 3a) Full Program with LTMP 47 ❑ I 3b) Modified Program with STMP 48 ❑ 4) additional conditions regarding Pretreatment attached or listed below 49 p 5) facility's sludge is being land applied or composted 50 ❑ 6) facility's sludge is incinerated (add Beryllium and Mercury sampling according to § 503.43) 51 ❑ 7) facility's sludge is taken to a landfill, if yes which landfill: 52 ❑ 8) other 53 Sludge Disposal Plan: Sludge is currently land applied as Class A sludge. 54 55 Sludge Permit No: WQ0003919 56 Page 1 POC Review Form A B C D E F G H I I J I K I L M N O P 57 4. LTMP/STMP and HWA Review 58 PW: Find L/STMP document, HWA spreadsheet, DMR, previous and new NPDES permit for next section. 59 a c U a. Parameter of Concern (POC) Check List New NPDES POC Previous NPDES POC Required by EPA PT(1) POC due to Sludge (2) POC due to SIU (3) POTW POC (4) % Removal Rate L/STMP Effluent Freq. NPDES Effluent Freq. PQLs review Comment 60 PQL from L/STMP, ug/I Required PQL per NPDES permit Recomm. PQL, ug/I 61 p Flow ❑ � El ❑ 62 p BOD 0 0 ❑ 63 0 TSS ❑ p p ❑ 64 0 NH3 ❑ 0 ❑ ❑ 65 ❑ Arsenic ❑ 0 ❑ ❑ 66 ❑ Barium ❑ ❑ ❑ ❑ ❑ 67 ❑ Beryllium(5) ❑ ❑ ❑ ❑ ❑ 68 p Cadmium(1) ❑ ❑ p 0 0 ❑ 69 0 Chromium(1) ❑ ❑ 0 ❑ 0 ❑ 70 0 Copper(l) ❑ ❑ 0 0 0 ❑ 71 p Cyanide ❑ ❑ ❑ 121 ❑ 72 [2] Lead(1) ❑ ❑ p p 0 ❑ 2.0 73 ❑ Mercury(5) ❑ ❑ p ❑ ❑ 0.001 74 ❑ Molybdenum ❑ ❑ p ❑ ❑ 10.0 75 0 Nickel(1) ❑ ❑ 0 0 p ❑ 76 0 Selenium ❑ ❑ p ❑ ❑ 1.0 77 0 Silver ❑ ❑ ❑ 0 ❑ 1.0 78 0 Zinc(1) ❑ ❑ 0 0 0 ❑ 10.0 79 ❑ Sludge Flow to Disposal p ❑ ❑ 80 ❑ % Solids to Disposal p ❑ ❑ 81 ❑ Oil & Grease 0 ❑ 82 ❑ TN ❑ 0 El ❑ 83 ❑ TP ❑ 0 0 ❑ 84 ❑ Chloride ❑ p ❑ ❑ 85 ❑ Cobalt ❑ ❑ ❑ ❑ 86 ❑ Sodium ❑ ❑ ❑ ❑ 87 ❑ Bis (2-ethylhexyl) phthalate ❑ ❑ ❑ ❑ El 88 ❑ ❑ ❑ 89 ❑ ❑ ❑ ❑ ❑ 90 ❑ I 1 ❑ 1 ❑ ❑ ❑ 91 Footnotes: (1) Always in the LTMP/STMP due to EPA -PT requirement (2) Only in LTMP/STMP if listed in sludge permit 92 93 94 (3) Only in LTMP/STMP while SIU still discharges to POTW 95 (4) Only in LTMP/STMP when pollutant is of concern to POTW 96 (5) In LTMP/STMP, if sewage sludge is incinerated 97 Please use blue font for the info updated by pw 98 Please use red font for POC that need to be added/modified in USTMP sampling plan 99 -lease 100 1 Blue shaded cell (D60:H81): Parameters usually included under that POC list 101 5. Comments 102 Facility Summary/background information/NPDES-PT regulatory action: POC to be added/modified in L/STMP: 103 ORC's comments on IU/POC: 104 POC submitted through Chemical Addendum or Supplemental Chemical Datasheet: 105 Additional pollutants added to L/STMP due to POTW s concerns: 106 NPDES pw's comments on IU/POC: 107 6. Pretreatment updates in response to NPDES permit renewal 108 NPDES Permit Effective Date 1180 days after effective (date): I Permit writer, please add list of required/recommended PT updates in NPDES permit cover letter. Page 2 POC Review Form Effluent Toxicity Report Form -Chronic Fathead Minnow Multi -Concentration Test Facility: Kinston RW RF NPDES # NC00 24236 Pipe #: 001 Labaratoa: Meritech, Inc. Comment z Test Initia8on DatelTime % Ell* Repl. Control Surviving # Original #. Wt/original (mg) 1.5 Surviving # Original #. WUoriglnal (mg) 3.5 Surviving # Original # -- Wt/original (mg) 8.1 Surviving# Original # Wiloriginal (mg), 9.15 Surviving# Original # Wt/original (mg). 12.2 Surviving # Original # WUoriglnal(m ) Water Quality Data Control pH (SU) Init/Fin DO (mg/L) InIVFIn Temp (C) InitlFln High Concentration pH (SU) inlUFln DO (mg/L) inIUFln Temp (C) Init/Fin Sample Collection Stan Dale Gmb Composite (Duration) Hardness (mg/L) Alkalinity (mg/L) Conductivity (umhos/cm) Chlorine(mg/L) Temp. at Receipt ("C) Number MAIL gRIGINAL TO: {Vats• Sciences Seetion Aquntie Toxicology Branch sion of Water Rnourees 162I ryla0 Service Center Raleigh, N.C. 27699-1621 9/13/2022 12:26 PM Ayg WNSurv. 1 z s a 10 10 10 10'" 10 10 0,578 0,568 -- 0.682 0.626 10 10 90 10 10 10. 10 10 0.643 0.598 10 - 10 - 'to 10 10 -' 10 '10 10 0.573 -` 0,644 -- -0.584 0.633 10 10 1 0 10 0.622 -' 0,565 -01536 uxmu 10 - 10 "10 10 10 _ 10 -"10 10 -- 0.662 0.645 0.607 0,098 ` 10 10 10 10 - 10 - 10 10 10 0.574 0773 0,574. 0.637 -- 9 10 Date:9123/2022 Test Organisms Cultured In -House r Outside Supplier Avg Wt (mg) 0,814 Hatch Date: 9M2122 %Survival - 100.0 Hatch Time: 4:0a6:00pm Avg Wt (mg) 0.840 % Survival 100.0 Avg Wt (mg) 0.609 % Survival 100.0 Avg Wt (mg) %Survival '100.0 Avg Wt (mg) A653 % Survival 1 q0,0 Avg Wt (mg) 0.640 .Day a __ 1 2 a 4 _6 _... 9 7:9'1 a 7,75 7,80 / 7.76 7.79 / 7.65 7.71 ! 7.62. 7.62 / 7.91 8.04 7 7.80 7,61 1 7,67 8,00 / 7,50 7,95 1 7,53 7,79 / 7.11 7,94 1 7,34' 7,84 1 7,61. 7.85 ;I 7,49 7.88 / 7.24 24.4 -1 24.4. 24.8 / 24.2 24.3 1 24.0 24.4 / 24.3 24.3 1 24.4 24.2 / 24.4 24,0 124.1 8.05 1 7.74 7,95 / 7.75: 7.91 i 7.70 7,91 Y 7.82 7:98 18.02 8.11 1 7.73- 7.86 / Z78 8.00 J 7.38 7.85 / 7.30 7.94 i 7.20. 7,88 17.48. 7.90 a 7.67 25.7 1 24.3 24.0 1 24.2 24.2 t 24.6 24:9 1 24:4 24,7 1 24.6 25,3 / '24.3 24,8 / 24.3 1 2 3 9/1112022 9/13/2022 9/1512022 23.9 i 23.9 40 36 42 167 206 165 2730 2030 2550 1.3 0.2 1.2 Dilution H2O Batch # 42 42 44 80 61 1 Hardness (mglL) Alkalinity (mg/L) 37 32 31 Conductivity (umhos/cm) 152 161 166 Date:9123/2022 Test Organisms Cultured In -House r Outside Supplier Avg Wt (mg) 0,814 Hatch Date: 9M2122 %Survival - 100.0 Hatch Time: 4:0a6:00pm Avg Wt (mg) 0.840 % Survival 100.0 Avg Wt (mg) 0.609 % Survival 100.0 Avg Wt (mg) %Survival '100.0 Avg Wt (mg) A653 % Survival 1 q0,0 Avg Wt (mg) 0.640 .Day a __ 1 2 a 4 _6 _... 9 7:9'1 a 7,75 7,80 / 7.76 7.79 / 7.65 7.71 ! 7.62. 7.62 / 7.91 8.04 7 7.80 7,61 1 7,67 8,00 / 7,50 7,95 1 7,53 7,79 / 7.11 7,94 1 7,34' 7,84 1 7,61. 7.85 ;I 7,49 7.88 / 7.24 24.4 -1 24.4. 24.8 / 24.2 24.3 1 24.0 24.4 / 24.3 24.3 1 24.4 24.2 / 24.4 24,0 124.1 8.05 1 7.74 7,95 / 7.75: 7.91 i 7.70 7,91 Y 7.82 7:98 18.02 8.11 1 7.73- 7.86 / Z78 8.00 J 7.38 7.85 / 7.30 7.94 i 7.20. 7,88 17.48. 7.90 a 7.67 25.7 1 24.3 24.0 1 24.2 24.2 t 24.6 24:9 1 24:4 24,7 1 24.6 25,3 / '24.3 24,8 / 24.3 1 2 3 9/1112022 9/13/2022 9/1512022 23.9 i 23.9 40 36 42 167 206 165 2730 2030 2550 1.3 0.2 1.2 Dilution H2O Batch # 42 42 44 80 61 1 Hardness (mglL) Alkalinity (mg/L) 37 32 31 Conductivity (umhos/cm) 152 161 166 8.05 1 7.74 7,95 / 7.75: 7.91 i 7.70 7,91 Y 7.82 7:98 18.02 8.11 1 7.73- 7.86 / Z78 8.00 J 7.38 7.85 / 7.30 7.94 i 7.20. 7,88 17.48. 7.90 a 7.67 25.7 1 24.3 24.0 1 24.2 24.2 t 24.6 24:9 1 24:4 24,7 1 24.6 25,3 / '24.3 24,8 / 24.3 1 2 3 9/1112022 9/13/2022 9/1512022 23.9 i 23.9 40 36 42 167 206 165 2730 2030 2550 1.3 0.2 1.2 Dilution H2O Batch # 42 42 44 80 61 1 Hardness (mglL) Alkalinity (mg/L) 37 32 31 Conductivity (umhos/cm) 152 161 166 1 2 3 9/1112022 9/13/2022 9/1512022 23.9 i 23.9 40 36 42 167 206 165 2730 2030 2550 1.3 0.2 1.2 Dilution H2O Batch # 42 42 44 80 61 1 Hardness (mglL) Alkalinity (mg/L) 37 32 31 Conductivity (umhos/cm) 152 161 166 Dilution H2O Batch # 42 42 44 80 61 1 Hardness (mglL) Alkalinity (mg/L) 37 32 31 Conductivity (umhos/cm) 152 161 166 Survival Growth State Cone. 4,5 Survival Critical Calculated 10 20 10 20 10 20 70 20 10 20 Growth Critical Calculated 2.41 •O.B583 3.5 2,41 0,1304 61 2.41 0,2919 9.15 2.41-0.9751 12.2 2.41-0.6397