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HomeMy WebLinkAboutNC0024244_Fact Sheet_20230127NCO024244 Fact Sheet NPDES Permit No. NCO024244 Permit Writer/Email Contact: Gary Perlmutter, gary.perlmutter@ncdenr.gov Date: January 23, 2023 Division/Branch: NC Division of Water Resources/NPDES Municipal Permitting Unit Fact Sheet Template: Version 08Sept2016 Permitting Action: ❑X Renewal A* ❑ 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 Albemarle / Long Creek WWTP Applicant Address: P.O. Box 190, Albemarle, NC 28002 Facility Address: 1040 Coble Avenue, Albemarle, NC 28001 Permitted Flow: 12.0 / 16.0 MGD Facility Type/Waste: MAJOR Municipal / 97% domestic; 3% industrial' Facility Class: Grade IV Treatment Units: Bar screen, Grit removal, Activated sludge, Secondary clarifiers, Tertiary filters, Chlorination, Dechlorination, Sludge dewatering, Digesters. Pretreatment Program (Y/N) Yes County: Stanly Region Mooresville Footnote. 1. The facility has an active pretreatment program with 3 industrial users, none currently significant. Permitted industrial flows provided by the ORC. Page 1 of 21 NC0024244 Briefly describe theproposedpermitting action andfacility background: The City of Albemarle has applied for NPDES permit renewal, and submitted a renewal application dated August 24, 2021, received by the Division on September 03, 2021. Review of the application found it incomplete with effluent pollutant scans (PPAs), second species test reports, process narrative, sludge management plan and chemical addendum lacking. The PPAs and 2ad species test reports were received by request on 10/28/2022; the PPAs were sampled in October 2019, September 2020 and June 2021; the 2nd species tests were sampled in June, September, October, and December 2021. At the time of application submission, the facility served a population of—17,810 residents including the City of Albemarle (pop.—15,980), Town of New London (pop. —600), and unincorporated Stanly County (pop. —1230). The facility has an active pretreatment program involving 3 industrial users: two textile facilities and the Albemarle City Landfill; one of the textile facilities was a Significant Industrial User that was dropped in September 2021 due to ceasing dyeing operations. The wastewater treatment process is in two facilities located —0.9 miles apart. The upper plant is largely retired but has an active headworks (bar screen and grit removal), influent lift station, and primary and secondary solids holding basins. The lower plant comprises the remainder of the treatment process, including aeration basins, secondary clarifiers, tertiary filters, chlorine disinfection and the outfall to Long Creek. The facility had entered a Special Order by Consent, SOC WQ S 19-007, effective October 1, 2020 — December 31, 2023, as it can neither consistently comply with NPDES permit BOD, TSS, Ammonia and Fecal Coliform limits nor Collection System Permit WQCS00016 conditions regarding sewer system overflows. The SOC was replaced with SOC WQ S 19-007 Ad I in October 2022, expiring August 31, 2026, extending deadlines for scheduled activities and interim compliance limits for BOD, TSS, Ammonia and Fecal Coliform, with the compliance date of May 31, 2026. The SOCs allow time for the City to make improvements to both its collection system and wastewater treatment plant and operate under interim permit limits for the above parameters. With the application, the City requested changes to the permit regarding the compliance schedule for Cadmium and Chromium IV, as well as a request to remove Color monitoring, following up from a letter request sent in February 2020. These items will be discussed in Section 6 - Water Quality -Based Effluent Limits (WQBEL) below. Sludge management. From correspondence with the ORC on 10/28/2022: `The plant is currently under an SOC (WQ 519-007) for "the wwtp's inability to handle low influent BOD concentrations ". The said low BOD concentrations inhibit biosolids production. Historically biosolids have been pump/hauled to Rocky River Regional Wastewater Treatment Plant which is operated by the Water & Sewer Authority of Cabarrus County. ' Page 2 of 21 NC0024244 2. Receiving Waterbody Information: Receiving Waterbody Information Outfalls/Receiving Stream(s): Outfall 001 / Long Creek Stream Segment: 13-17-31 Stream Classification C Drainage Area (mi): 64 Summer 7Q 10 (cfs) 1.6 Winter 7Q 10 (cfs): 9.5 Average Flow (cfs): 64 IWC (% effluent): 92.08% at12 MGD and 93.94% at16 MGD 2022 NC 303(d) listed/parameter: Copper (7 µg/l, AL, FW) 1 Subject to TMDL/parameter: Statewide Mercury TMDL Subbasin/HUC: 03-07-13 / 03040105 USGS Topo Quad: F18SW Albemarle Footnote. 1. Total Copper impairment at the stream segment —9 miles downstream from the outfall; impairment based on a Legacy Category 5 Total Metals Assessment in 2008. 3. Effluent Data Summary Effluent data are summarized below for the period October 2018 through September 2022. The plant was operating under SOC WQ S 19-007, issued and effective October 1, 2020 and expiring December 31, 2023, with modified limits in effect until September 30, 2023, extended to May 31, 2026 under SOC WQ S19- 007 Ad I. Summary data are in two tables: one under SOC limits (Table 1), and one under permit limits (Table 2). Table 1. Effluent Data Summary under SOC-modified limits (October 2020 — September 2022). Parameter Units Average Max Min Limits 1 BOD summer 2 mg/L 4.3 21.0 < 2.0 MA = 15.0 WA = 35.0 BOD winter mg/L 14.k, < 2.0 MA = 25.0 WA = 35.0 TSS mg/L 121 1 MA = 35.0 WA = 50.0 NH3-N mg/L MA = 5.0 WA = 15.0 = 400 3 Fecal Coliform #/100 1).:) WA WA = 800 3 Footnotes on next naQe. Page 3 of 21 NCO024244 Footnotes. 1. MA = Monthly Average; WA = Weekly Average; DM = Daily Maximum. 2. Summer = April 1 - October 31; winter = November 1 - March 31. 3. Geometric mean. Table 2. Effluent Data Summary under permit limits (October 2018 - September 2022). Parameter -7 Units Average Max Min Limits' Flow MGD 5.46 22.68 1.54 MA = 12.0 BOD summer 2,3 mg/L 8.9 38.1 < 2.0 MA = 10.0 WA = 15.0 BOD winter 2,3 mg/L 14.0 46.0 2.7 MA = 20.0 WA = 30.0 BOD removal % 82.5 98.9 -242.9 > 85 TSS 2 mg/L 22.4 105 3.6 MA = 30.0 WA = 45.0 TSS removal % 73.3 87.8 -376 > 85 NH3-N summer 2, 3 mg/L 1.27 11.54 0.01 MA = 2.0 WA = 6.0 N113-N winter 2,3 mg/L 5.36 13.28 0.02 MA = 4.0 WA = 12.0 DO mg/L 8.38 13.5 3.0 > 5.0 Fecal Coliform2,4 #/100 mL 24 > 8100 < I MA = 200/100 WA = 400/100 Total Residual µg/L 19 47 12 DM = 18 5 Chlorine (TRC) Temperature °C 19 28 7 Total Nitrogen mg/L 13.75 30.77 2.80 Total Phosphorus mg/L 1.28 4.61 0.19 Conductivity µmhos/cm 332 637 102 Total Hardness mg/L 48.3 77 22.6 Total Cadmium 6 µg/L 0.63 1.5 < 0.5 MA = 1.12 DM = 6.62 Total Chromium µg/L 5.4 7 3 Chromium VI µg/L 0.97 5.22 0.01 MA = 11.9 DM = 17.2 Total Copper 6 µg/L 19.8 53 5 MA = 16.09 DM = 22.52 [Total Silver ng/L 1.7 5.0 0.8 Page 4 of 21 NCO024244 Parameter Units Average Max Min Limits' Bis(2-ethylhexyl) phthalate µg/L 3.09 < 10 < 2 Color ADMI 22 43 12 PH SU 6.8 8.1 6.0 6.0-9.0 Footnotes. 1. MA = Monthly Average; WA = Weekly Average; DM = Daily Maximum. 2. Data are from Oct 2018 — Sep 2020 (pre-SOC). 3. Summer = April 1 — October 31; winter = November 1 — March 31. 4. Geometric mean. 5. Compliance level = 50 µg/L 6. Limits not in effect; delayed via compliance schedule. 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/1 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). If applicable, summarize any instream data and what instream monitoring will be proposed for this permit action: The current permit requires instream monitoring for six parameters (Color, Conductivity, Copper, DO, Hardness and Temperature) in four locations (U, D1, D2, 133) in Long Creek, not all at the same locations (see Table 3). Hardness is sampled upstream for calculation of dissolved to total metals for hardness -dependent metals, including Copper, and is addressed in the Reasonable Potential Analysis (RPA) portion of Section 6 - Water Quality -Based Effluent Limits (WQBEL) below. Table 3. Instream sampling locations and permit -required parameters. Instream Outfall Location Parameter(s) identifier U 001 > 100 ft upstream of discharge Hardness, DO, Temperature, Conductivity, Copper DI 001 —2620 ft downstream DO, Temperature, Conductivity, Copper D2 001A 4.9 mi. downstream at NCSR 1967 DO, Temperature, Conductivity, (Sides Rd) Copper D3 001B —200 ft downstream Color D1 was moved from its original location at the end of NCSR 1960 to its current location in a permit modification in December 2012 due to safety concerns. Instream monitoring data were reviewed from DMRs with concurrent effluent data for evaluation of potential stream impacts. Downstream data are reported as different outfalls in the Division's BIMS database (Table 3). Upstream and downstream data were tested for significance via ANOVA followed by t-tests if averages appeared to differ, with level of Page 5 of 21 NCO024244 significance set at 0.05. If significant differences were found by ANOVA, t-tests was run to check for differences between a downstream average and the upstream average. Effluent data in Table 2 were compared against those instream. Reviewed data are summarized in Table 4 and elaborated in the following paragraphs. Table 4. Instream monitoring averages and ranges (in parentheses). *Statistically different from Upstream. Downstream Parameter Upstream Standard' D1 (001) D2 (001A) D3 (001B) Dissolved Oxygen Avg = 8.4 Avg = 7.7* Avg = 8.3 Avg = 9.1 * DA = 5.0 (DO), mg/L (3.0-13.5) (5.4-12.3) (6.513.5) (5.9-12.5) Instant = 4.0 Temperature, °C Avg = 20 Avg = 23* Avg = 22* Avg = 18* DM = 32.0 (3-31) (8-32) (7-30) (5-30) Conductivity, Avg = 208 Avg = 272* Avg = 250 NA µmhos/cm (80-415) (105--471) (71-412) Total Copper, Avg = 2.8 Avg = 7.8* Avg = 5.8* NA Acute = 20.12 µg/L 2 (2-10) (3-21) (2-19) Chronic = 14.32 Total Hardness, Avg = 73.3 NA NA NA mg/L (30-137) Color, ADMI Avg = 27.3 NA NA Avg = 24.0* (11-79) (12-65) pH, SU Avg =7.6 Avg =7.2* Avg =7.5* Avg =7.4* 6.0-9.0 (7 1-8.8) (6.0-8.3) (6.99.2) (6.2-9.0) Turbidity, NTU Avg = 13.6 NA NA Avg = 25.3* 50 (2.2-60.0) (5.9-80.0) Footnotes 1. DA = Daily Average; DM = Daily Maximum. 2. Total Copper standards were calculated using average instream hardness of 73.3 mg/L for this hardness -dependent dissolved metal and the EPA translator of 0.348 from dissolved to total. See attached Dissolved Metals Fact Sheet Memo for details. Dissolved Oxygen (DO) — Instream DO remains in the permit as a parameter of concern for aquatic life. The receiving stream is meeting criteria in the 2022 Integrated Report. Reviewed instream DMR data from October 2018 through September 2022 was shown to be above the DO standard of 5.0 mg/L consistently downstream, but not upstream, which recorded below the standard twice in September 2019 and once in August 2022. Instream averages tested different with statistical significance among all sites and upstream tested different than and D1 and D3, but not D2. The effluent average DO is very similar to that upstream, and so does not appear to be impacting the stream. Temperature - Instream Temperature remains in the permit as a parameter of concern for aquatic life. The receiving stream is meeting criteria in the 2022 Integrated Report. Temperatures in all sites were below the standard of 32°C for lower piedmont and coastal plain waters. Significant differences were found among all sites and between the upstream and each downstream site. There were four instances where the downstream temperature at D1 exceeded the water quality standard of 2.8°C above the natural water temperature when compared to upstream data, and one exceedance involving D3 (Table 5). Considering Page 6 of 21 NCO024244 the sporadic nature of these downstream temperature increases and the insignificant findings of temperature increase over the period examined, it does not appear that the effluent is impacting instream temperature. Table 5. Temperature Increase (°C) Exceedances in Long Creek. Sample Location Date 1 Effluent Upstream Downstream (D1) Downstream (D3) Dl — U Diff. D3 — U Diff. 8/7/2018 26 26 29 27 3 1 6/11/2019 23 21 24 -- 1/23/2020 10 4 -- 7/21/2021 1 23 26 1 29 11/28/2021 1 15 1 12 1 18 1 13 3 1 Conductivity — Instream Conductivity remains in the permit as a parameter of concern due to industrial dischargers. The Permittee dropped their sole significant industrial user, Auria, from their pretreatment program in July 2021, approved by the Division that month. The drop was in response to a change in Auria's process by eliminating its dyeing operations, thereby no longer meeting criteria for Significant Industrial User status. Statically significant differences were found among instream sites, and between the upstream and each downstream site. The corresponding effluent data was higher on average, suggesting an impact on the stream. Color — Instream Color is in the permit as a parameter of concern due to the presence of industrial dischargers. As stated above, the industrial discharger Auria had ceased dyeing operations, and the Permittee had requested Color monitoring be removed from the permit in its renewal application. Significant color difference was detected between the upstream and downstream sites, but with the downstream site at a lower average value. The effluent average was lower than either instream average, indicating no negative impact. Based on this pattern, color instream monitoring is removed from the permit. Copper - Instream Copper remains in the permit as a parameter of concern due to the stream's current listing for copper impairment on the Final 2022 303(d) list. Total Copper impairment is based on a Legacy Category 5 Total Metals Assessment in 2008, exceeding the freshwater standard of 7 µg/L for aquatic life at Assessment Unit 13-17-3lb, located —8.6 miles downstream of the outfall (Assessment Unit 13-17-31a, wherein the outfall lies is not impaired). Since that time the state water quality standards for metals have been updated, with those requiring calculation of dissolved to total metals for hardness -dependent metals, which include copper. Using Permittee-submitted upstream Total Hardness data, the instream water quality standards for Total Copper are calculated to be 14.32 µg/L chronic and 20.12 µg/L acute. Review of instream copper data found both downstream averages to be statistically significantly higher than the upstream average, with the overall average exceeding the chronic standard at D1, but not at D2. Monthly data showed exceedances of both standards numerous times, more so at D 1 than at D2 (Table 6). Effluent copper values averaged higher, indicating impact on this impaired stream segment. Instream copper monitoring is maintained. Page 7 of 21 NC0024244 Table 6. Number of exceedences of the Total Copper water quality standards in Long Creek, 2018-2022. Location Chronic (14.32 µg/L) Acute (20.12 µg/L) U 0 0 D1 7 2 D2 1 0 Fecal Coliform — Fecal Coliform instream monitoring was removed from the permit in 2000 without any notes regarding its basis. The receiving stream is neither a Class B nor impaired for Fecal Coliform, meeting the criteria for its removal per the Division's instream monitoring guidance document (DWQ 2002). However, based on the number of effluent exceedences (see Section 5 — Compliance History) the Permittee has reported, instream Fecal Coliform will be added to the permit. Other parameters — Although not required, the Permittee monitored instream pH and Turbidity, two parameters that have instream water quality standards. The receiving stream is meeting criteria for both parameters in the 2022 Integrated Report. The submitted instream data were reviewed, finding significant differences between the upstream and each downstream averages for each parameter, but not exceeding their respective stream standards. Instream monitoring for pH and Turbidity is not required and will not be added to the permit. Instream monitoring frequencies in the current permit are weekly in summer months (June through September) and monthly during the rest of the year, which are less frequent than those under NC 15A NCAC 2B .0500 (3/week in summer, weekly in winter). These monitoring frequencies have been in the permit dating back to 1992 and were likely set in a previous permit. A review of permit files dating as far back as 1989 revealed no explanation for the monitoring frequencies, and consultation with regional office personnel also yielded no explanation. Instream monitoring frequencies are maintained due to no substantial impact from the effluent. Is this facility a member of a Monitoring Coalition with waived instream monitoring (YIN): NO Name of Monitoring Coalition: NA 5. Compliance Summary Summarize the compliance record with permit effluent limits (past 5 years): From October 2017 through September 2022 the facility had reported several exceedances in BOD, TSS, Ammonia and Fecal Coliform. In response to the facility's chronic non-compliance, it entered an SOC in October 2020 with relaxed limits for the above parameters. This SOC, expiring in December 2023, was replaced by an emended SOC in October 2022, extending the limits and conditions until its expiration in August 2026 (see details in Section 1 above). Since October 1, 2020, the effective date of the SOC, the facility reported one Ammonia monthly average exceedance in April 2021, and 38 TSS exceedances (12 monthly average and 26 weekly average). All reported exceedances have resulted in enforcement cases. The TSS exceedences are the result of the City's water treatment plant (WTP) discharging alum sludge to the WWTP via its collection system. To address the necessary pretreatment requirements for this source related to TSS limits, a special condition will be added to the permit requiring the City's pretreatment Page 8 of 21 NC0024244 program be updated, and to bring the WTP into the program with an Industrial User Permit (IUP) containing limits for TSS and other pertinent parameters to address passthrough and interference with the WWTP. Summarize the compliance record with aquatic toxicity test limits and any second species test results (past S years): The facility passed 19 of 20 quarterly chronic toxicity tests, with one failure followed by two successive passing tests. as well as all 4 second species chronic toxicity tests. Second species tests were sampled on 6/6/2021, 9/12/2021, 10/3/2021, and 12/5/2021. Summarize the results from the most recent compliance inspection: The most recent facility inspection (compliance evaluation), conducted on 8/16/2022, reported no issues and acknowledges the facility is operating under an SOC. 6. Water Quality -Based Effluent Limitations (WQBELs) Dilution and Mixing Zones In accordance with 15A NCAC 213.0206, the following streamflows are used for dilution considerations for development of WQBELs: 1Q10 streamflow (acute Aquatic Life); 7Q10 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/L 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 are based on a Streeter -Phelps model (Level B), conducted before the 1992 permit, for instream DO protection. However, the facility is currently operating under relaxed SOC limits, which are still more stringent than the TBELs. 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/L (summer) and 1.8 mg/L (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 µg/L) and capped at 28 µg/L (acute impacts). Due to analytical issues, all TRC values reported below 50 µg/L are considered compliant with their permit limit. Describe any proposed changes to ammonia and/or TRC limits for this permit renewal: The current permit limits are based on WLA to protect against ammonia toxicity, set in 2018: Page 9 of 21 NC0024244 Season 12.0 MGD 16.0 MGD Monthly Average Weekly Average Monthly Average Weekly Average Summer 1.1 3.3 1.1 3.3 Winter 2.6 7.8 2.4 7.2 The facility is operating under relaxed SOC year-round limits of 5.0 / 15.0 mg/L monthly/weekly average until SOC expiration in 2026, when the permit limits become effective. Similarly, the current TRC limit of 18 µg/L daily maximum was set based on the WLA and thus 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 %2 detection limit for "less than" values; and 4) streamflows used for dilution consideration based on 15A NCAC 2B.0206. Effective April 6, 2016, NC began implementation of 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 October 2018 through September 2022 for the 12.0 MGD and the 16.0 MGD expansion flows. 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 qualit standards/criteria: Pollutant 12.0 MGD 16.0 MGD Chronic Acute Chronic Acute Cadmium 1.09 6.36 1.06 6.21 Copper 15.6 21.6 15.1 21.0 Cyanide 5.4 23.6 5.3 23.2 Zinc 249 249 242 242 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: Chromium VI, Total Lead and Total Silver at both flow tiers. o Silver - quarterly monitoring is maintained due to one detection in September 2022 at 2 µg/L, following Division guidance for implementing instream dissolved metals standards (DWR 2016). 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: Arsenic, Page 10 of 21 NC0024244 Beryllium, Total Chromium, Total Phenolic Compounds, Nickel, Selenium, Molybdenum and Bis(2-ethylhexyl) phthalate at both flow tiers. o Total Chromium — maximum reported value is less than the allowable Cw for Chromium VI at both flow tiers. o Bis(2-ethylhexyl) phthalate — all data of past three years (since September 2019) were nondetects at < 2 µg/L, > allowable Cw for each flow tier and < PQL of 10 µg/L (allowable Cw = 1.6 ug/L at 12 MGD and 1.3 ug/L at 16 MGD). POTW Effluent Pollutant Scan Review: Three effluent pollutant scans were evaluated for additional pollutants of concern. Samples for the pollutant scans were collected on 10/15/2019, 9/15/2020, and 6/2/2021. No additional pollutants were detected. 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. 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: This is a Major POTW, and a chronic WET limit at 90% effluent will continue on a quarterly frequency at both flow tiers. 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 control. Municipal facilities > 2 MGD and discharging quantifiable levels of mercury (> I ng/L) 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/L) and/or if any individual value exceeds a TBEL value of 47 ng/L. Describe proposed permit actions based on mercury evaluation: The current permit has a MMP requirement but no MMP summary was submitted with the application. It was received upon request on 1/10/2023, consisting of a series of data tables of the effluent, collection system and industrial sources, as well as a summary of a dental office amalgam survey. Since the 2022 annual average was greater than the WQBEL at each flow tier but no single value was higher than the TBEL, an annual average WQBEL will be added to the permit for both flow tiers, with quarterly monitoring using EPA Method 1631 E (low level). Despite the facility being < 2 MGD, the MMP special condition will be maintained. Page 11 of 21 NC0024244 Table 7. Mercury Effluent Data Summary 2018 2019 2020 2021 2022 # of Samples 6 6 4 4 3 Annual Average Cone. ng/L 8.7 5.5 9.4 6.3 14.8 Maximum Cone., ng/L 23.80 18.30 13.80 13.10 28.40 TBEL, ng/L 47 WQBEL, ng/L at 12 MGD 13.03 WQBEL, ng/L at 16 MGD 12.77 Other TMDL/Nutrient Management Strategy Considerations If applicable, describe any other TMDLs/Nutrient Management Strategies and their implementation within this permit: The facility is not subject to any TMDL or Nutrient Management Strategy, but to better understand effluent Total Nitrogen, Total Kjeldahl Nitrogen (TKN) and Nitrate -Nitrite Nitrogen (NO3-N + NO2) reporting will be added to the permit at both flow tiers. Other WQBEL Considerations- Permit Limit Development The current total chromium limitations were maintained in the interim effluent sheet until hexavalent chromium levels can be assessed. The reasonable potential analysis using the city's total chromium effluent data showed reasonable potential to violate the new hexavalent chromium standard. As a result, hexavalent chromium limitations were added to this permit. Sampling for hexavalent chromium will ascertain if hexavalent chromium is present in the total chromium samples and thus the effluent. If applicable, describe any other parameters of concern evaluated for WQBELs: The current permit has monitoring requirement for Color, based on a textile industrial user conducting a dyeing operation. The Permittee requested removal of Color from the permit or have it be subject to a permit reopener clause, citing the industrial user had ceased its dyeing operation. Effluent color data were reviewed and found that the average was lower than instream averages (Tables 2 and 4). The effluent does not appear to affect the instream color and therefore monitoring requirements will be removed from the permit. In the event that dyeing operations resume or are initiated from the existing or new textile industrial users, the permit reopener special condition, currently in the permit, will be maintained. The emerging contaminants PFAS and 1,4-Dioxane were sampled from of the municipal landfill leachate by the City upon request for a Chemical Addendum on 11/18/2022. Results showed elevated concentrations of several parameters (Table 8). Average flow of landfill leachate to the WWTP from the past three years is 31,591 gal/day (0.0316 MGD). The nearest downstream water supply (WS-IV) boundary, for the Blewett Falls Lake water supply watershed, lies 40 miles from the WWTP's outfall. Page 12 of 21 NC0024244 Table 8. Emerging Contaminants from the City of Albermarle Landfill leachate, sampled November 18, 2022 with PFAS parameters at concentrations > 100 ng/L. Parameter Result 1,4-Dioxane, µg/L 35.3 Perfluorooctanoic Acid (PFOA), ng/L 1060 Perfluorooctanosulfonic Acid (PFOS), ng/L 667 2-(N-Methylperfluorooctanesulfonamido) acetic acid (N-McFOSAA), ng.L 280 Perfluoroheptanoic Acid (PFHpA), ng/L 410 Perfluoropentanoic acid (PFPeA), ng/L 851 Perfluorohexanoic Acid (PFHxA), ng/L 1280 Perfluorohexanesulfonic acid (PFHxS) 209 Perfluorobutanoic acid (PFBA), ng.L 588 Perfluorobutanesulfonic acid (PFBS), ng/L 185 6:2 Fluorotelomer Sulfonate (6:2 FTS), ng/L 103 2H,211,314,311-Perfluorooctanoic Acid (5:3 FTCA), ng/L 3040 In addition, the City submitted several Safety Data Sheets and Technical Bulletins from the two textile industrial users (IUs). Their review revealed most products to be of proprietary nature with limited chemical information provided. PFAS release by the two textile IUs could not be determined from this review. Based on the presence of PFAS and 1,4-Dioxane in the landfill leachate, the potential of PFAS in the wastestreams from the two textile IUs AURIA and Creative Dyeing, and the positioning of the outfall upstream of a water supply watershed, quarterly monitoring for PFAS and 1,4-Dioxane will be added to the permit. In addition, a special condition to reopen the permit for changes in 1,4-Dioxane requirements will be added to the permit. To address pretreatment issues related to landfill leachate, the proposed Pretreatment Update special condition (see Section 5 — Compliance Summary) will require the City's landfill be included in the pretreatment program with an Industrial User Permit with appropriate conditions and requirements. The US EPA issued NPDES permitting guidance addressing PFAS in a memo dated 12/5/2022. Recommendations in the guidance memo applicable to the Albermarle — Long Creek WWTP permit involve monitoring, pretreatment, biosolids, and public notice. Monitoring of effluent, influent and biosolids is recommended at frequencies of at least quarterly, using the EPA Draft Method 1633 with results submitted via DMRs. Until the final method is approved, as it may involve changes to the parameter list, the proposed quarterly PFAS sampling requirement will include 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 CFR 136 published in the Federal Register. This date may be extended upon request and if there are no NC -certified labs. If applicable, describe any compliance schedules proposed for this permit renewal in accordance with 15A NCAC 2K0107(c)(2)(B), 40CFR 122.47, and EPA May 2007Memo: The current permit contains a seven (7) year compliance schedule for Cadmium, Chromium VI, and Copper, with the compliance date of Page 13 of 21 NC0024244 9/l/2025. Based on the RPA results, Chromium VI limits will be removed and monitoring reduced to quarterly; Chromium VI will be removed from the compliance schedule. A compliance schedule was offered for the proposed Cyanide limits, but the ORC declined. 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 mg1L BOD51TSS for Monthly Average, and 45 mg/L for BOD51TSS for Weekly Average). YES If NO, provide a justification for alternative limitations (e.g., waste stabilization pond). NA Are 85% removal requirements for BOD51TSS included in the permit? YES. 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 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): YES If YES, confirm that antibacksliding provisions are not violated: The facility is currently operating under an SOC with temporarily -reduced limits for BOD, TSS, Ammonia and Fecal Coliform. Removal of Chromium VI limits is based on evaluation of recent effluent data plus Hardness data. Page 14 of 21 NCO024244 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. No effluent parameters are sampled at reduced monitoring frequencies. For instream monitoring, refer to Section 4 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. Effective December 21, 2020, NPDES regulated facilities will be required to submit additional NPDES reports electronically. This permit contains the requirements for electronic reporting, consistent with Federal requirements. 12. Summary of Proposed Permitting Actions: Current permit conditions and proposed changes are presented in the following tables for 12.0 and 16.0 MGD flow tiers, respectively. Table 8. Current Permit Conditions and Proposed Changes at 12.0 MGD. Parameter Current Permit' Proposed Change Basis for Condition/Change Flow MA = 12.0 MGD Monitor continuously No change 15A NCAC 213.0505 Summer: MA = 10.0 mg/L WQBEL. Based on 1993 WLA WA = 15.0 mg/L model and protection of DO BODS Winter: No change standard. 15A NCAC 2B .0200, MA — 20 mg/L 0500. WA = 30 mg/L Monthly daily MA = 30 mg/L TBEL. Secondary treatment TSS WA = 45 mg/L No change standards / 40 CFR 133 / 15A Monitor daily NCAC 2B .0406, .0500. Page 15 of 21 NC0024244 Parameter Current Permit' Proposed Change Basis for Condition/Change Summer: MA = 1.1 mg/L WA = 3.3 mg/L WQBEL. WLA results, for N-13-N Winter: No change protection from toxicity. 15A NCAC MA = 2.6 mg/L 2B .0500. WA = 7.8 mg/L Monitor daily DA > 5.0 mg/L WQBEL. 15A NCAC 213.0200. DO No change Based on 1993 WLA and for the Monitor daily protection of water quality. 15A NCAC 213.0500. MA = 200 /100 mL WQBEL. 15A NCAC 213.0200, Fecal Coliform WA = 400 /100 mL No change 0500. Monitor daily TRC DM = 18 µg/L. No change WQBEL. 15A NCAC 2B .0200, Monitor daily .0500; WLA results Temperature Monitor daily No change 15A NCAC 2B .0500 Total Kjeldahl No requirement Add monthly For calculating Total Nitrogen Nitrogen (TKN) monitoring Nitrate -Nitrite Nitrogen (NO3-N No requirement Add monthly F8r calculating Total Nitrogen + NOz-N) monitoring Total Nitrogen Monitor monthly No change 15A NCAC 2B .0500 Total Phosphorus Monitor monthly No change 15A NCAC 2B .0500 Conductivity Monitor daily No change 15A NCAC 213.0500 Monitor effluent and Revised WQS and EPA's guidelines Total Hardness instream (upstream) No change on hardness -dependent metals. quarterly Interim Limits No change in interim MA — 2.2 µg/L limits or monitoring DM = 16.0 µg/L frequency Final Limits WQBEL. 15A NCAC 213.0200. MA = 1.12 µg/L Final Limits Reasonable potential (RP) to exceed Total Cadmium DM = 6.62 µg/L MA = 1.1 µg/L WQS using updated Hardness data. Montor monthly DM = 6.4 µg/L Delayed implementation of final No change to limits via compliance schedule. Seven-year compliance compliance schedule, schedule, expires expires Aug 31, 2025 August 31, 2025. No RP found using updated Total Chromium Monitor monthly Remove from permit Hardness data; maximum result > Allowable Cw for Chromium VI. Page 16 of 21 NC0024244 Parameter Current Permit' Proposed Change 1 Basis for Condition/Change MA = 11.7 µg/L DM = 16.9 µg/L Remove limits and Monitor monthly compliance schedule, No RP found using updated Chromium -VI due to Hardness data. Hardness data; maximum result > Seven-year compliance 50% Allowable Cw. schedule, expires Monitor quarterly August 31, 2025. MA = 16.09 µg/L MA = 15.6 µg/L DM = 22.52 µg/L DM = 21.6 µg/L WQBEL. 15A NCAC 213.0200. RP Monitor monthly found, using updated Hardness data. Total Copper No change in Seven-year compliance monitoring frequency Delayed implementation of limits schedule, expires or compliance schedule, via compliance schedule. August 31, 2025. expires Aug 31, 2025. MA = 5.4 µg/L Total Cyanide No requirement DM = 23.6 µg/L WQBEL. 15A NCAC 213.0200. RP found. Monitor monthly No RP found using updated Total Lead No requirement Monitor quarterly Hardness data; maximum result > 50% Allowable Cw. One detection found within past Total Silver Monitor quarterly No change three years (DWR Dissolved Metals Guidance, 2016). Mercury Minimization Maintain MMP WQBEL - statewide mercury Total Mercury Plan (MMP) AA = 13.0 ng/L TMDL, based on plant size; annual Monitor quarterly average data exceeded WQBEL. All data of past 3 yrs (since 9/2019) Bis (2-ethylhexyl) Monitor quarterly Remove from permit were nondetects at < 2 µg/L, > Cw phthalatelima for each flow tier and < PQL of 10 µg/L. Add quarterly 1,4-Dioxane No requirement monitoring; add reopener special More data are needed to evaluate. condition Add quarterly PFAS No requirement monitoring special More data are needed to evaluate. condition Textile industrial user ceased dyeing Color (ADMI) Monitor Instream and Remove from permit operations; effluent and instream at the Effluent, 2/month data show no effects on instream color. Page 17 of 21 NC0024244 Parameter Current Permit 1 Proposed Change Basis for Condition/Change Chronic Toxicity Chronic limit, 90% WQBEL. No toxics in toxic Test effluent No change amounts. 15A NCAC 2B .0200, Monitor quarterly .0500 pH Between 6 and 9 SU No change WQBEL. 15A NCAC 2B .0200, Monitor daily .0500 Effluent Pollutant Three times per permit Update sample years: 40 CFR 122 Scan cycle 2024, 2025, 2026. Color Reopener Special condition No change NCGS.143-215.66, NCGS 143- 215.1 (b) Pretreatment TSS exceedences caused by WTP Update No requirement Special Condition effluent and contaminants reported in landfill leachate. Electronic Special condition Update special In accordance with EPA Electronic Reporting condition Reporting Rule 2015. Footnote. 1. MGD = million gallons per day, MA = monthly average, WA = weekly average, DM = daily maximum, DA = daily average, AA = annual average. Table 9. Current Permit Conditions and Proposed Changes at 16.0 MGD. Parameter Current Permit' Proposed Change' Basis for Condition/Change Flow MA = 16.0 MGD Monitor continuously No change 15A NCAC 213.0505 Summer: MA = 10.0 mg/L WQBEL. Based on 1993 WLA WA = 15.0 mg/L model and protection of DO BODS Winter: No change standard. 15A NCAC 2B .0200, MA — 20.0 mg/L O500 WA = 30.0 mg/L Monitor daily MA = 30.0 mg/L TBEL. Secondary treatment TSS WA = 45.0 mg/L No change standards / 40 CFR 133 / 15A Monitor daily NCAC 2B .0406, .0500. Summer: MA = 1.1 mg/L WA = 3.3 mg/L WQBEL. WLA results, for NH3-N Winter: No change protection from toxicity. 15A MA = 2.4 mg/L NCAC 213.0500. WA = 7.2 mg/L Monitor daily DA > 5.0 mg/L WQBEL. Based on 1993 WLA and DO Monitor daily No change for the protection of water quality; 15A NCAC 213.0500. Page 18 of 21 NC0024244 Parameter Current Permit 1 Proposed Change 1 Basis for Condition/Change MA = 200 /100 mL WQBEL. WQ standard, 15A NCAC Fecal Coliform WA = 400 /100 mL No change 2B .0200, .0500. Monitor daily TRC DM 18.0 µg/L No change WQBEL. WLA results; 15A NCAC Monitor daily 2B .0200, .0500. Temperature Monitor daily No change 15A NCAC 2B .0500 Total Kjeldahl No requirement Add monthly For calculating Total Nitrogen Nitrogen (TKN) monitoring Nitrate -Nitrite Add monthly Nitrogen (NO3-N No requirement monitoring For calculating Total Nitrogen + NOz-N) Total Nitrogen Monitor monthly No change 15A NCAC 2B .0500 Total Phosphorus Monitor monthly No change 15A NCAC 2B .0500 Conductivity Monitor daily No change 15A NCAC 2B .0500 Monitor effluent and Revised WQS and EPA's guidelines Total Hardness instream (upstream) No change on hardness -dependent metals. quarterly MA = 1.12 µg/L MA = 1.1 µg/L WQBEL. 15A NCAC 2B .0200. Total Cadmium DM = 6.62 µg/L DM = 6.2 µg/L Reasonable potential to exceed Monitor monthly Monitor monthly WQS. No RP found using updated Total Chromium Monitor monthly Monitor quarterly Hardness data; maximum result > Allowable Cw for Chromium VI. MA = 11.7 µg/L Remove limits No RP found using updated Chromium -VI DM = 16.9 µg/L Monitor quarterly Hardness data; maximum result > Monitor monthly 50% Allowable Cw. MA = 15.78 µg/L MA = 15.1 µg/L WQBEL. 15A NCAC 213.0200. RP Total Copper DM = 22.15 µg/L DM = 21.0 µg/L found, using updated Hardness data. Monitor monthly Monitor monthly MA = 5.3 µg/L Total Cyanide No requirement DM = 23.2 µg/L WQBEL. 15A NCAC 2B .0200. RP found. Monitor monthly No RP found using updated Total Lead No requirement Monitor quarterly Hardness data; maximum result > 50% Allowable Cw. One detection found within past Total Silver Monitor quarterly No change three years (DWR Dissolved Metals Guidance, 2016). Page 19 of 21 NCO024244 Parameter Current Permit' Proposed Change Basis for Condition/Change Mercury Minimization Maintain MMP WQBEL - statewide mercury Total Mercury Plan (MMP) AA = 12.8 ng/L TMDL, based on plant size; annual Monitor quarterly average data exceeded WQBEL. All data of past 3 yrs (since 9/2019) Bis (2-ethylhexyl) Monitor quarterly Remove from permit Were nondetects at < 2 µg/L, > Cw phthalate for each flow tier and < PQL of 10 µg/L. Add quarterly 1,4-Dioxane No requirement monitoring; add reopener special data are needed to evaluate. condition Add quarterly PFAS No requirement monitoring / special More data are needed to evaluate. condition Textile industrial user ceased dyeing Color (ADMI) Monitor Instream and Remove from permit operations; effluent and instream at the Effluent, 2/month data show no effects on instream color. Chronic Toxicity Chronic limit, 90% WQBEL. No toxics in toxic Test effluent No change amounts. 15A NCAC 2B .0200, Monitor quarterly .0500. pH Between 6 and 9 SU No change WQBEL. WQ standard, 15A NCAC Monitor daily 2B .0200, .0500. Effluent Pollutant Three times per permit Revise as first three Scan cycle years after effective 40 CFR 122 date of expanded flow Color Reopener Special condition No change NCGS.143-215.66, NCGS 143- 215.1 (b) Pretreatment TSS exceedences caused by WTP Update No requirement Special Condition effluent and contaminants reported in landfill leachate. Electronic Special condition Update special In accordance with EPA Electronic Reporting condition Reporting Rule 2015. Footnote. 1. MGD = million gallons per day, MA = monthly average, WA = weekly average, DM = daily maximum, DA = daily average, AA = annual average. 13. Public Notice Schedule: Permit to Public Notice: xx/xx/2023 Per 15A NCAC 21-1.0109 & .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 Page 20 of 21 NC0024244 within the 30 days comment period indicating the interest of the party filing such request and the reasons why a hearing is warranted. 14. Fact Sheet Addendum (if applicable): Were there any changes made since the Draft Permit was public noticed (Yes/No): YES If Yes, list changes and their basis below: 15. Fact Sheet Attachments (if applicable): • Effluent Pollutant Scan reports • 2"d species WET test reports • Process Narrative with system diagrams • EMC SOC WQ S 19-007 • EMC SOC WQ S 19-007 Ad I • Final 2022 NC 303(d) List, page 186 • Final 2022 Integrated Report, pages 1310-1311 • WET Testing Summary, page 1 • Compliance Evaluation Inspection report, 8/31 /2022 • Waste load allocations for TRC and NH3-N - 12 and 16 MGD • RPA Spreadsheet Summaries and dissolved to total metal calculator - 12 and 16 MGD • Dissolved Metals Implementation/Freshwater • Mercury WQBEL/TBEL evaluation - 12 and 16 MGD • Mercury Minimization Plan summary • Chemical Addendum including supplemental information Page 21 of 21 Annual Monitoring and Pollutant Scan Permit No. _ Outfall DO/ Facility Name: Long Creek WWTP 4-No ORC: Brandon W. Plyler Date of sampling: 10- 15-20 19 Phone: 704-984-9634 Analytical Laboratory: Environment 1 L- O/ -r Parameter Sample TypeVA6-5 Analytica d Ammonia (as N) Composite0.1 Dissolved oxygen Grab Nitrate/Nitrite Composite3.2 Total Kjeldahl nitrogen Composite1.2 Total Phosphorus Composite5.4 Total dissolved solids Composite997Hardness Composite997Chlorine (total residual, TRC) Grab Oil and grease Grab EPA 1664B Metals (total recoverable), cyanide and total phenols Antimony Composite EPA 200.7 Arsenic Composite I EPA 200.7 Beryllium Cadmium Chromium Dpper Lead Mercury Nickel Selenium Silver Thallium Zinc Cyanide Total phenolic compounds Volatile organic compounds Acrolein Acrylonitrile Benzene Bromoform Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane 2-chloroethylvinyl ether Chloroform -hlorobromomethane ,1-dichloroethane 1,2-dichloroethane Trans- 1, 2-dichloroethylene Month�'�`�� YearC'/y Quantitation Level Sample Result Units of Measurement Number of samples 0.1 0.5 0.1 6.2 mg/1 mg/1 1 1 1.0 12.9 mg/1 1 0.5 2.9 mg/l 1 0.1 0.8 mg/1 1 50.0 219.0 rng/l 1 2.5 41.0 rng/l 1 15.0 <15 µg/L 1 5.0 10.0 <5 52 mg/1 µg/L 1 1 10.0 I <3 I µg/ L �- 1 Composite L EPA 200.7 1.0 <1 µg/L 1 Composite LEEPA 200.7 1.0 <0.5 jig/ L 1 Composite EPA 200.7 10.0 <2 µg/L 1 Composite EPA 200.7 10.0 9 µg/L 1 Composite EPA 200.7 10.0 <2 µg/L 1 Composite EPA 7470A 0.2 <0.2 µg/L 1 Composite EPA 200.7 10.0 <5 µg/L 1 Composite EPA 200.7 10.0 <3 µg/L 1 Composite EPA 200.7 10.0 <1 µg/L 1 Composite EPA 200.8 1.0 <1 µg/L 1 Composite EPA 200.7 10.0 32 µg/L 1 Grab EPA 9014 0.01 <0.005 mg/I 1 Grab EPA 420.1 0.05 <5 µg/L 1 Grab EPA 624 10.0 <100 µg/L 1 Grab EPA 624 10.0 <50 µg/L 1 Grab EPA 624 1.0 <5 µg/L 1 Grab EPA 624 1.0 <5 µg/L 1 Grab EPA 624 1.0 <5 µg/L 1 Grab EPA 624 1.0 <5 µg/L 1 Grab EPA 624 1.0 <5 µg/L 1 Grab EPA 624 1.0 <10 µg/L 1 Grab EPA 624 5.0 <5 µg/L 1 Grab EPA 624 1.0 <5 µg/L 1 Grab EPA 624 1.0 <5 µg/L 1 Grab EPA 624 1.0 <5 µg/L 1 Grab EPA 624 1.0 <5 µg/L 1 Grab EPA 624 1.0 <5 µg/l, 1 Form - DMR- PPA-1 Page 1. Permit No. Outfall &0 Y2 ,vx Annual Monitoring and Pollutant Scan ,,Parameter volatile organic compo Moroethyleneoropropaneropropyleneeneomideloride chloride 1,1,2,2-tetrachloroethane Tetrachloroethylene Toluene 1, 1, 1 -trichloroethane 1,1,2-trichloroethane Vinyl chloride Acid -extractable compounds P-chloro-m-creso 2-chlorophenol 2,4-dichlorophenol 4-dimethylphenol E 6diitro-o-cresolitrophenolhenolhenollorophenolichlorophenolutral compoundsthene Acenaphthylene Anthracene oBenzo(ghi)perylene e anthracene pyrene ofluoranthene luoranthene Bis (2-chloroethoxy) methane Bis (2-chloroethyl) ether Bis (2-chloroisopropyl) ether -is (2-ethylhexyl) phthalate iromophenyl phenyl ether Butyl benzyl phthalate 2-chloronaphthalene Month Year Sample Type Analytical Method Quantitation Sample Units of r Number of Level Result Measurement samples (Cont.) Grab EPA 624 1.0 <5 µg/L 1 Grab EPA 624 1.0 <5 µg/L 1 Grab EPA 624 1.0 <5 µg/L 1 Grab EPA 624 1.0 <5 µg/L 1 Grab EPA 624 1.0 <10 µg/L 1 Grab EPA 624 1.0 <10 µg/L 1 Grab EPA 624 1.0 <10 µg/L 1 Grab EPA 624 1.0 <5 µg/L 1 Grab EPA 624 1.0 <5 µg/L 1 Grab EPA 624 1.0 <5 µg/L 1 Grab EPA 624 1.0 <5 µg/ L 1 Grab EPA 624 1.0 <5 Grab EPA 624 1.0 Grab EPA 624 Grab EPA 625 10.0 <20 µg/L 1 Grab EPA 625 10.0 <10 µg/L 1 Grab EPA 625 10.0 <10 µg/L 1 Grab EPA 625 10.0 <10 µg/L 1 Grab EPA 625 10.0 <50 µg/L 1 Grab EPA 625 10.0 Grab EPA 625 10.0 <10 Grab EPA 625 10.0 <50 µg/L 1 Grab EPA 625 10.0 <50 µg/L 1 Grab EPA 625 10.0 <10 µg/L 1 Grab EPA 625 10.0 <10 µg/L 1 Grab EPA 625 Grab EPA 625 Grab EPA 625 Grab EPA 625 Grab EPA 625 Grab EPA 625 Grab EPA 625 Grab EPA 625 Grab EPA 625 Grab EPA 625 Grab EPA 625 Grab EPA 625 Grab EPA 625 Grab EPA 625 Grab EPA 625 Grab EPA 625 10.0 <10 µg/L 1 10.0 <10 µg/L 1 10.0 <10 µg/L 1 i v.v __lUU µg/L 1 10.0 <10 µg/L 1 10.0 <10 µg/L 1 10.0 <10 µg/L 1 10.0 <10 µg/L 1 10.0 <10 µg/L 1 10.0 <10 µg/L 1 10.0 <10 µg/L 1 10.0 <10 µg/L 1 5.0 <20 µg/L 1 10.0 <10 µg/L 1 10.0 10.0 <10 <10 µg/L µg/L 1 1 Form - DMR- PPA-1 Page 2 e� Annual Monitoring and Pollutant Scan Permit No. ,�r�t%�. Y� �`/ Outfall Month 4-chlorophenyl phenyl ether Grab EPA 625 10.0 <10 Or µg/L 1 Parameter Sample Type Analytical Method Quantitation Level Sample Result Units of Number of Measurement samples Base -neutral compounds (cant.) Chrysene Grab EPA 625 10.0 <10 µg/L 1 Di-n-butyl phthalate Grab EPA 625 10.0 <10 µg/L Di-n-octyl phthalate Grab EPA 625 10.0 <10 µg/L 1 Grab EPA 625 10.0 <10 µg/L 1 1Dibenzo(a,h)anthracene 1,2-dichlorobenzene Grab EPA 625 10.0 <10 µg/L 1 1,3-dichlorobenzene Grab EPA 625 10.0 <10 µg/L 1 1,4-dichlorobenzene Grab EPA 625 10.0 <10 µd 1 3,3-dichlorobenzidine Grab EPA 625 10.0 <10 µg/L 1 Dimethyl phthalate Grab EPA 625 1V.0 10.0 <lU <10 µg/L µg/L 1 1 214-dinitrotoluene Grab EPA 625 10.0 <10 tE µg/L 1 2,6-dinitrotoluene Grab EPA 625 10.0 <10 µg/L 1 1,2-diphenylhydrazine Grab EPA 625 10.0 <10 µg/L 1 Fluoranthene Grab EPA 625 10.0 <10 µg/L 1 Fluorene Grab EPA 625 10.0 <10 µg/L 1 Hexachlorobenzene Grab EPA 625 10.0 <10 µg/L 1 Hexachlorobutadiene Grab EPA 625 10.0 <10 µg/L Hexachlorocyclo-pentadiene Grab EPA 625 10.0 <10 µg/L 1 exachloroethane Grab EPA 625 10.0 <10 µg/L 1 Indeno(1,2,3-cd)pyrene Grab EPA 625 10.0 <10 µg/L 1 Isophorone Grab EPA 625 10.0 <10 µg/L 1 Naphthalene Grab EPA 625 10.0 <10 µg/L 1 Nitrobenzene Grab EPA 625 10.0 <10 µg/L 1 N-nitrosodi-n-propylamine Grab EPA 625 10.0 <10 µg/L 1 N-nitrosodimethylamine Grab EPA 625 10.0 <10 µg/L N-nitrosodiphenylamine Grab EPA 625 10.0 <10 µg/L 1 Phenanthrene Grab EPA 625 10.0 <10 µg/L 1 Pyrene Grab EPA 625 10.0 <10 µg/L 1 1,2,4,-trichlorobenzene Grab I EPA 625 10.0 <10 µg/L 1 "I 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 my inquiry of the person or persons who managed the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fines and imprisonment for knowing violations." Authorized Representative game Signature Date Form - DMR- PPA-1 Page 3 nnual Monitoring and Pollutant Scan Permit No. Outfall Month Year lr� Facility Name: Long Creek WWTP Date of sampling 9/ 15/2020 Analytical Laboratory: Environment 1 ORC: Brandon W. Plyler Phone: 704-984-9634 Parameter `: Sample �`ype . Analytical; Method = Quantitation Level Sample Result. Unitsof Measurement Number of, samples Ammonia (as N) Composite EPA 350.1 0.1 0.1 mg/1 1 Dissolved oxygen Grab 300 0.5 7.7 mg/1 1 Nitrate/Nitrite Composite EPA 353.2 1.0 17.5 mg/1 1 Total Kjeldahl nitrogen Composite EPA 351.2 0.5 2.0 mg/l 1 Total Phosphorus Composite EPA 365.4 0.1 1.4 mg/l 1 Total dissolved solids Composite SM254OC-1997 50.0 211.0 mg/1 1 Hardness Composite SM234OB-1997 2.5 51.0 mg/1 1 Chlorine (total residual, TRC) Grab 50060 15.0 <15 µg/L 1 Oil and grease Grab EPA 1664B 5.0 <5 mg/l 1 Metals (total recoverable), cyanide and total phenols Antimony Composite EPA 200.7 10.0 28 µg/L 1 Arsenic Composite EPA 200.7 10.0 <2 µg/L 1 Beryllium Composite EPA 200.7 1.0 <1 µg/L 1 Cadmium Composite EPA 200.7 1.0 <0.5 IAg/L 1 Chromium Composite EPA 200.7 10.0 5 µg/L 1 Copper Composite EPA 200.7 10.0 30 µg/L 1 Lead Composite EPA 200.7 10.0 <2 µg/L 1 Mercury Composite EPA 7470A 0.2 5.6 µg/L 1 Nickel Composite EPA 200.7 10.0 4 µg/L 1 Selenium Composite EPA 200.7 10.0 <3 µg/L 1 Silver Composite EPA 200.7 10.0 <1 µg/L 1 Thallium Composite EPA 200.8 1.0 <1 µg/L 1 Zinc Composite EPA 200.7 10.0 156 µg/L 1 Cyanide Grab EPA 9014 0.01 <10 mg/l 1 Total phenolic compounds Grab EPA 420.1 0.05 <5 µg/L 1 Volatile organic compounds Acrolein Grab EPA 624 10.0 < 100 µg/ L 1 Acrylonitrile Grab EPA 624 10.0 <50 µg/L 1 Benzene Grab EPA 624 1.0 <5 µg/L 1 Bromoform Grab EPA 624 1.0 <5 µg/L 1 Carbon tetrachloride Grab EPA 624 1.0 <5 µg/L 1 Chlorobenzene Grab EPA 624 1.0 <5 µg/L 1 Chlorodibromomethane Grab EPA 624 1.0 <5 µg/L 1 Chloroethane Grab EPA 624 1.0 < 10 µg/ L 1 2-chloroethylvinyl ether Grab EPA 624 5.0 <5 µg/L 1 Chloroform Grab EPA 624 1.0 <5 In/ 1 Dichlorobromomethane Grab EPA 624 1.0 <5 µg/L 1 1, 1 -dichloroethane Grab EPA 624 1.0 <5 IAg/L 1 1,2-dichloroethane Grab EPA 624 1.0 <5 µg/L 1 Trans-1,2-dichloroethylene Grab EPA 624 1.0 <5 µg/L 1 Form - DMR- PPA-1 Page 1 Permit No. Annual Monitoring and Pollutant Scan ✓��' Outfall Month Year Parameter Sample Type Analytical Method Quantitation Level Sample Result Units of Measurement Number of samples Volatile organic compounds (Cont.) 1, 1 -dichloroethylene Grab EPA 624 1.0 <5 1,2-dichloropropane Grab EPA 624 1.0 <5 µg/L 1 1,3-dichloropropylene Grab EPA 624 1.0 <5 µg/L 1 Ethylbenzene Grab EPA 624 1.0 <5 µg/L 1 Methyl bromide Grab EPA 624 1.0 <10 µg/L 1 Methyl chloride Grab EPA 624 1.0 <10 µg/L 1 Methylene chloride Grab EPA 624 1.0 <10 µg/L 1 1,1,2,2-tetrachloroethane Grab EPA 624 1.0 <5 µg/L 1 Tetrachloroethylene Grab EPA 624 1.0 <5 µg/L 1 Toluene Grab EPA 624 1.0 <5 µg/L 1 1, 1, 1 -trichloroethane Grab EPA 624 1.0 <5 µg/L 1 1,1,2-trichloroethane Grab EPA 624 1.0 <5 µg/L 1 Trichloroethylene Grab EPA 624 1.0 <5 µg/L 1 Vinyl chloride Grab EPA 624 1.0 <10 µg/L 1 Acid -extractable compounds P-chloro-m-creso Grab EPA 625 10.0 <20 µg/L 1 2-chlorophenol Grab EPA 625 10.0 <10 µg/L 1 2,4-dichlorophenol Grab EPA 625 10.0 <10 µg/L ]. 2,4-dimethylphenol Grab EPA 625 10.0 <10 µg/L 1 4,6-dinitro-o-cresol Grab EPA 625 10.0 <50 µg/L 1 2,4-dinitrophenol Grab EPA 625 10.0 <50 µg/L 1 2-nitrophenol Grab EPA 625 10.0 <10 µg/ L 1 4-nitrophenol Grab EPA 625 10.0 <50 µg/L 1 Pentachlorophenol Grab EPA 625 10.0 <50 µg/L 1 Phenol Grab EPA 625 10.0 <10 µg/L 1 2,4,6-trichlorophenol Grab EPA 625 10.0 <10 µg/L 1 Base -neutral compounds Acenaphthene Grab EPA 625 10.0 <10 Acenaphthylene Grab EPA 625 10.0 <10 µg/ L 1 Anthracene Grab EPA 625 10.0 <10 µg/L 1 Benzidine Grab EPA 625 10.0 <100 µg/L 1 Benzo(a)anthracene Grab EPA 625 10.0 <10 µg/L 1 Benzo(a)pyrene Grab EPA 625 10.0 <10 µg/L 1 3,4 benzofluoranthene Grab EPA 625 10.0 <10 µg/L 1 Benzo(ghi)perylene Grab EPA 625 10.0 <10 µg/L 1 Benzo(k)fluoranthene Grab EPA 625 10.0 <10 µg/L 1 Bis (2-chloroethoxy) methane Grab EPA 625 10.0 <10 µg/L 1 Bis (2-chloroethyl) ether Grab EPA 625 10.0 <10 µg/L 1 Bis (2-chloroisopropyl) ether Grab EPA 625 10.0 <10 µg/L 1 Bis (2-ethylhexyl) phthalate Grab EPA 625 5.0 <20 µg/L 1 4-bromophenyl phenyl ether Grab EPA 625 10.0 <10 µg/L 1 Butyl benzyl phthalate Grab EPA 625 10.0 <10 µg/L 1 2-chloronaphthalene Grab EPA 625 10.0 <10 µg/L 1 Form - DMR- PPA-1 Page 2 Annual Monitoring and Pollutant Scan Permit No. 7A1-�2 �, Outfall bO 0 Month Year a? x fli-8 4-chlorophenyl phenyl ether Grab EPA 625 10.0 <10 µg/L 1 Parameter Sample Type Analytical ' Method ! Quantitation; Level Sample Result' Units `off Measurement,: Number of samples Base -neutral compounds (cant) . Chrysene Grab EPA 625 10.0 <10 µg/L 1 Di-n-butyl phthalate Grab EPA 625 10.0 <10 µg/L 1 Di-n-octyl phthalate Grab EPA 625 10.0 <10 µg/L 1 Dibenzo(a,h)anthracene Grab EPA 625 10.0 <10 µg/L 1 1,2-dichlorobenzene Grab EPA 625 10.0 <10 µg/L 1 1,3-dichlorobenzene Grab EPA 625 10.0 <10 µg/L 1 1,4-dichlorobenzene Grab EPA 625 10.0 <10 µg/L 1 3,3-dichlorobenzidine Grab EPA 625 10.0 <10 µg/L 1 Diethyl phthalate Grab EPA 625 10.0 <10 µg/L 1 Dimethyl phthalate Grab EPA 625 10.0 <10 µg/L 1 2,4-dinitrotoluene Grab EPA 625 10.0 <10 µg/L 1 2,6-dinitrotoluene Grab EPA 625 10.0 <10 µg/L 1 1,2-diphenylhydrazine Grab EPA 625 10.0 <10 µg/L 1 Fluoranthene Grab EPA 625 10.0 <10 µg/L 1 Fluorene Grab EPA 625 10.0 <10 µg/L 1 Hexachlorobenzene Grab EPA 625 10.0 <10 µg/L 1 Hexachlorobutadiene Grab EPA 625 10.0 <10 µg/L 1 Hexachlorocyclo-pentadiene Grab EPA 625 10.0 <10 µg/L 1 Hexachloroethane Grab EPA 625 10.0 <10 µg/L 1 Indeno(1,2,3-cd)pyrene Grab EPA 625 10.0 <10 µg/L 1 Isophorone Grab EPA 625 10.0 <10 µg/L 1 Naphthalene Grab EPA 625 10.0 <10 µg/L 1 Nitrobenzene Grab EPA 625 10.0 <10 µg/L 1 N-nitrosodi-n-propylamine Grab EPA 625 10.0 <10 µg/L 1 N-nitrosodimethylamine Grab EPA 625 10.0 <10 µg/L 1 N-nitrosodiphenylamine Grab EPA 625 10.0 <10 µg/L 1 Phenanthrene Grab EPA 625 10.0 <10 µg/L 1 Pyrene Grab EPA 625 10.0 <10 µg/L 1 1,2,4,-trichlorobenzene Grab EPA 625 10.0 <10 µg/L 1 "I 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 my inquiry of the person or persons who managed the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fines and imprisonment for knowing violations." Authorized Representative name Signature Date Form - DMR- PPA-1 Page 3 /� � ,,_ ,. nnual Monitoring and Pollutant Scan � Permit No. 1 Month Outfall Year Parameter Sample Type Analytical Method Quantitation Level Sample Result Units of Measurement Number of samples Volatile organic compounds (Cont.) 1, 1 -dichloroethylene Grab EPA 624 1.0 <5 µg/L 1 1,2-dichloropropane Grab EPA 624 1.0 <5 µg/L 1 1,3-dichloropropylene Grab EPA 624 1.0 <5 µg/L 1 Ethylbenzene Grab EPA 624 1.0 <5 µg/L 1 Methyl bromide Grab EPA 624 1.0 <10 IAg/ L 1 Methyl chloride Grab EPA 624 1.0 <10 IAg/L 1 Methylene chloride Grab EPA 624 1.0 <10 µg/L 1 1,1,2,2-tetrachloroethane Grab EPA 624 1.0 <5 µg/L 1 Tetrachloroethylene Grab EPA 624 1.0 <5 µg/L 1 Toluene Grab EPA 624 1.0 <5 µg/L 1 1, 1, 1 -trichloroethane Grab EPA 624 1.0 <5 µg/L 1 1,1,2-trichloroethane Grab EPA 624 1.0 <5 µg/L 1 Trichloroethylene Grab EPA 624 1.0 <5 µg/L 1 Vinyl chloride Grab EPA 624 1.0 <10 µg/L 1 Acid -extractable compounds P-chloro-m-creso Grab EPA 625 10.0 <20 µg/L 1 2-chlorophenol Grab EPA 625 10.0 <10 ug/L 1 2,4-dichlorophenol Grab EPA 625 10.0 <10 µg/L 1 2,4-dimethylphenol Grab EPA 625 10.0 <10 µg/L 1 4,6-dinitro-o-cresol Grab EPA 625 10.0 <50 ug/L 1 2,4-dinitrophenol Grab EPA 625 10.0 <50 µg/L 1 2-nitrophenol Grab EPA 625 10.0 <10 µg/L 1 4-nitrophenol Grab EPA 625 10.0 <50 ug/L 1 Pentachlorophenol Grab EPA 625 10.0 <50 µg/L 1 Phenol Grab EPA 625 10.0 <10 µg/L 1 2,4,6-trichlorophenol Grab EPA 625 10.0 <10 µg/L 1 Base -neutral compounds, Acenaphthene Grab EPA 625 10.0 <10 µg/L 1 Acenaphthylene Grab EPA 625 10.0 <10 ug/L 1 Anthracene Grab EPA 625 10.0 <10 µg/L 1 Benzidine Grab EPA 625 10.0 <100 µg/L 1 Benzo(a)anthracene Grab EPA 625 10.0 <10 Benzo(a)pyrene Grab EPA 625 10.0 <10 3,4 benzofluoranthene Grab EPA 625 10.0 <10 µg/L 1 Benzo(ghi)perylene Grab EPA 625 10.0 <10 µg/L 1 Benzo(k)fluoranthene Grab EPA 625 10.0 <10 µg/L 1 Bis (2-chloroethoxy) methane Grab EPA 625 10.0 <10 µg/L 1 Bis (2-chloroethyl) ether Grab EPA 625 10.0 <10 µg/L 1 Bis (2-chloroisopropyl) ether Grab EPA 625 10.0 <10 µg/L 1 Bis (2-ethylhexyl) phthalate Grab EPA 625 5.0 <20 µg/L 1 4-bromophenyl phenyl ether Grab EPA 625 10.0 <10 µg/L 1 Butyl benzyl phthalate Grab EPA 625 10.0 <10 µg/L 1 2-chloronaphthalene Grab EPA 625 10.0 <10 µg/L 1 Form - DMR- PPA-1 Page 2 ��7� Annual Monitoring and Pollutant Scan Permit No. 7 Month 66 Outfall L Year :a? D 4-chlorophenyl phenyl ether Grab EPA 625 10.0 <10 µg/L 1 Parameter Sample Type " Analytical Method Quantitation Level Sample': Result. Units of'.; . Measurement` ° Number of samples Sase=neutral compounds'(cont ) Chrysene Grab EPA 625 10.0 <10 µg/L 1 Di-n-butyl phthalate Grab EPA 625 10.0 <10 µg/L 1 Di-n-octyl phthalate Grab EPA 625 10.0 <10 µg/L 1 Dibenzo(a,h)anthracene Grab EPA 625 10.0 <10 µg/L 1 1,2-dichlorobenzene Grab EPA 625 10.0 <10 µg/L 1 1,3-dichlorobenzene Grab EPA 625 10.0 <10 µg/L 1 1,4-dichlorobenzene Grab EPA 625 10.0 <10 µg/L 1 3,3-dichlorobenzidine Grab EPA 625 10.0 <10 µg/L 1 Diethyl phthalate Grab EPA 625 10.0 <10 µg/L 1 Dimethyl phthalate Grab EPA 625 10.0 <10 µg/L 1 2,4-dinitrotoluene Grab EPA 625 10.0 <10 µg/L 1 2,6-dinitrotoluene Grab EPA 625 10.0 <10 µg/L 1 1,2-diphenylhydrazine Grab EPA 625 10.0 <10 µg/L 1 Fluoranthene Grab EPA 625 10.0 <10 µg/L 1 Fluorene Grab EPA 625 10.0 <10 µg/L 1 Hexachlorobenzene Grab EPA 625 10.0 <10 µg/L 1 Hexachlorobutadiene Grab EPA 625 10.0 <10 µg/L 1 Hexachlorocyclo-pentadiene Grab EPA 625 10.0 <10 µg/L 1 Hexachloroethane Grab EPA 625 10.0 <10 µg/L 1 Indeno(1,2,3-cd)pyrene Grab EPA 625 10.0 <10 µg/L 1 Isophorone Grab EPA 625 10.0 <10 µg/L 1 Naphthalene Grab EPA 625 10.0 <10 µg/L 1 Nitrobenzene Grab EPA 625 10.0 <10 µg/L 1 N-nitrosodi-n-propylamine Grab EPA 625 10.0 <10 µg/L 1 N-nitrosodimethylamine Grab EPA 625 10.0 <10 µg/L 1 N-nitrosodiphenylamine Grab EPA 625 10.0 <10 µg/L 1 Phenanthrene Grab EPA 625 10.0 <10 µg/L 1 Pyrene Grab EPA 625 10.0 <10 µg/L 1 1,2,4,-trichlorobenzene Grab EPA 625 10.0 <10 µg/L 1 "I 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 my inquiry of the person or persons who managed the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fines and imprisonment for knowing violations." Author'presenVti name Signature 7' Date Form - DMR- PPA-1 Page 3 Annual Monitoring and Pollutant Scan Permit No.� Outfall Month Year 9=0-)1 Facility Name: Long Creek WWTP Date of sampling 6/2/2021 Analytical Laboratory: Environment 1 ORC: Brandon W. Plyler Phone: 704-984-9634 Parameter Sample Type Analytical Method Quantitation Level Sample Result Units of Measurement Number of samples Ammonia (as N) Composite EPA 350.1 0.1 0.1 mg/l 1 Dissolved oxygen Grab 300 0.5 7.7 mg/l 1 Nitrate/Nitrite Composite EPA 353.2 1.0 5.9 mg/1 1 Total Kjeldahl nitrogen Composite EPA 351.2 0.5 2.0 mg/1 1 Total Phosphorus Composite EPA 365.4 0.1 1.5 mg/1 1 Total dissolved solids Composite SM254OC-1997 50.0 260.0 mg/1 1 Hardness Composite SM2340B-1997 2.5 75.0 mg/1 1 Chlorine (total residual, TRC) Grab 50060 15.0 16.0 µg/L 1 Oil and grease Grab EPA 1664B 5.0 <5 mg/1 1 Metals (total recoverable), cyanide and total phenols Antimony Composite EPA 200.7 10.0 45 µg/L 1 Arsenic Composite EPA 200.7 10.0 <2 µg/L 1 Beryllium Composite EPA 200.7 1.0 <1 µg/L 1 Cadmium Composite EPA 200.7 1.0 <0.5 µg/L 1 Chromium Composite EPA 200.7 10.0 <2.0 µg/L 1 Copper Composite EPA 200.7 10.0 38 µg/L 1 Lead Composite EPA 200.7 10.0 <2 µg/L 1 Mercury Composite EPA 7470A 0.2 12.9 µg/L 1 Nickel Composite EPA 200.7 10.0 6 µg/L 1 Selenium Composite EPA 200.7 10.0 <3 µg/L 1 Silver Composite EPA 200.7 10.0 <1 µg/L 1 Thallium Composite EPA 200.8 1.0 <1 µg/L 1 Zinc Composite EPA 200.7 10.0 182 µg/L 1 Cyanide Grab EPA 9014 0.01 <5.0 mg/1 1 Total phenolic compounds Grab EPA 420.1 0.05 <20 µg/L 1 Volatile organic compounds Acrolein Grab EPA 624 10.0 <100 µg/L 1 Acrylonitrile Grab EPA 624 10.0 <50 µg/L 1 Benzene Grab EPA 624 1.0 <5 µg/L 1 Bromoform Grab EPA 624 1.0 <5 µg/L 1 Carbon tetrachloride Grab EPA 624 1.0 <5 µg/L 1 Chlorobenzene Grab EPA 624 1.0 <5 µg/L 1 Chlorodibromomethane Grab EPA 624 1.0 <5 µg/L 1 Chloroethane Grab EPA 624 1.0 <10 µg/L 1 2-chloroethylvinyl ether Grab EPA 624 5.0 <5 µg/L 1 Chloroform Grab EPA 624 1.0 <5 µg/L 1 Dichlorobromomethane Grab EPA 624 1.0 <5 µg/L 1 1,1-dichloroethane Grab EPA 624 1.0 <5 µg/L 1 1,2-dichloroethane Grab EPA 624 1.0 <5 µg/L 1 Trans-1,2-dichloroethylene Grab EPA 624 1.0 <5 µg/L 1 Form - DMR- PPA-1 Page 1 • PO Box 7565 oCTIC Asheville, NC 28802 8802 c Phone: (828) 350-9364 Fax: (828) 350-9368 Envleanmental Testing Solutions, Inc cssi. ..+ r....:e;+., Rnnnr+ Pnrm - rhrnnir Fathead Minnow Multi -Concentration Test Date: September 26, 2021 Facility: Environment 1, Inc. NPDES #: NC 0024244 Pipe #: 001 County: Stanly City of Albemarle, Long Creek WWTP .aboratory Performing Test: Environmental Testing Solutions, Inc., Certificate # 037 signature of Operator in Responsible Charge (ORC): SRC Phone / E-mail: signature of Laboratory Supervisor At-� e-Mail to: ATForms.ATB(dDncdenr.gov Or Mail Original to: North Carolina Division of Water Resources Water Sciences Section / Aquatic Toxicology Branch 1621 Mail Service Center Raleigh, NC 27699-1621 Test StartDate: September 14, 2021 Control Organisms % Effluent 45 % Effluent 67.5 % Effluent 90% % Effluent 95% % Effluent 300% Water Quality Data Control pH (SU): DO (mg/L): Temp. (°C): High Concent PH (SU): DO (mg/L): Temp. (°C): Comments Project #: 16262 Sample #: 210914.04, 210916.06, 210918.0 Test Organisms: Pimephales promelas Supplier P.g,n -house Culture ch: 09-13-21 1500 End hatch: 09-14-21 0505 Replicate number 7 1 4 Surviving number of larvae 10 10 10 10 Original number of larvae 10 10 10 10 Weight/original (mg/larvae) 0.667 0.662 0.737 0.818 Surviving number of larvae 10 10 10 10 Original number of larvae 10 10 10 10 weight/original (mg/larvae) 0.940 0.887 0.851 0.872 Surviving number of larvae 10 10 10 10 Original number of larvae 10 10 10 10 Weight/original (mg/larvae) 0.733 0.618 0.734 0.817 Surviving number of larvae 10 10 10 10 Original number of larvae 10 10 10 10 weight/original (mg/larvae) 0.768 0.738 0.723 0.691 Surviving number of larvae 9 10 10 10 Original number of larvae 10 10 10 10 Weight/original (mg/larvae) 0.721 0.776 0.676 0.600 Surviving number of larvae 10 10 10 10 Original number of larvae 10 10 10 10 Weight/original (mg/larvae) 0.731 0.688 0,733 0.687 Survival (%) 100.0 Average wt (mg) 0.721 Average wt / 0.721 surviving (mg) Survival (%) 100.0 Average wt (mg) 0.888 Survival (%) 100.0 Average wt (mg) 0.726 Survival (%) 100.0 Average wt (mg) 0.730 Survival (%) 97.5 Average wt (mg) 0.695 Survival (%) 100.0 Average wt (mg) 0.710 7.82 7.74 7.88 7.70 7.90 7.71 7.80 7.78 7.87 7.65 7.87 7.73 7.81 7.74 7.7 7.1 7.8 7.6 7.8 T5 7.7 7.6 7.6 7.4 7.7 7.4 7.8 7.2 24.7 24.6 24.8 24.4 24.8 24.6 24.9 24.6 24.7 24.4 24.8 24.3 24.7 24.4 ration 6.27 6.52 6.53 6.49 6.26 6.31 6.31 6.50 5.92 6.27 6.30 6.44 6.41 6.44 8.3 8.0 7.8 7.6 8.1 7.4 7.7 7.3 8.3 1 7.5 8.1 7.4 7.6 7.3 25.0 24.5 25.0 24.6 25.0 24.4 25.0 24.5 24.9 1 24.2 7.5.0 24.3 24.9 24.5 Sample Information Collection start date: Grab: Composite duration: Alkalinity (mg/L CaCO,): Hardness (mg/L CaCO3): Conductivity (µmhos/cm): Total residual chlorine (mg/L): Sample Temp. at Receipt (.C): Sample 1 Sample 2 Sample 3 Control 09-12-21 09-14-21 09-16-21 }4;:% 24-h 24.25-h 24-h (` 7.1 3.1 3.1 60, 59, 61 50 56 52 92, 94, 92 365 360 415 a 0.10o.8 1.9 0.7 Overall Analysis: Result: PASS LOEC: >100% NOEC: 100% ChV: Analyses Normal: Hom. Var. NOEL: LOEC: ChV: Method: Survival Growth Yes Yes Yes Yes 100% 100% >100% >100% >100% >100% Visual Insp. I Dunnett's Survival Growth %Effluent Critical Calculated Critical Calculated 45% 2.410 -3.997 67.5% 2.410 -0.108 90% 2.410 -0.216 g5% 2.410 0.630 100% 2.410 0.270 >100% Sample Information Collection start date: Grab: Composite duration: Alkalinity (mg/L CaCO,): Hardness (mg/L CaCO3): Conductivity (µmhos/cm): Total residual chlorine (mg/L): Sample Temp. at Receipt (.C): Sample 1 Sample 2 Sample 3 Control 09-12-21 09-14-21 09-16-21 }4;:% 24-h 24.25-h 24-h (` 7.1 3.1 3.1 60, 59, 61 50 56 52 92, 94, 92 365 360 415 a 0.10o.8 1.9 0.7 Overall Analysis: Result: PASS LOEC: >100% NOEC: 100% ChV: Analyses Normal: Hom. Var. NOEL: LOEC: ChV: Method: Survival Growth Yes Yes Yes Yes 100% 100% >100% >100% >100% >100% Visual Insp. I Dunnett's Survival Growth %Effluent Critical Calculated Critical Calculated 45% 2.410 -3.997 67.5% 2.410 -0.108 90% 2.410 -0.216 g5% 2.410 0.630 100% 2.410 0.270 >100% Overall Analysis: Result: PASS LOEC: >100% NOEC: 100% ChV: Analyses Normal: Hom. Var. NOEL: LOEC: ChV: Method: Survival Growth Yes Yes Yes Yes 100% 100% >100% >100% >100% >100% Visual Insp. I Dunnett's Survival Growth %Effluent Critical Calculated Critical Calculated 45% 2.410 -3.997 67.5% 2.410 -0.108 90% 2.410 -0.216 g5% 2.410 0.630 100% 2.410 0.270 >100% Survival Growth %Effluent Critical Calculated Critical Calculated 45% 2.410 -3.997 67.5% 2.410 -0.108 90% 2.410 -0.216 g5% 2.410 0.630 100% 2.410 0.270 >100% >100% o 07 PO Box 7565 Asheville, NC 28802 Phone: (828) 350-9364 \. Fax: (828) 350-9368 .: Env6°nmendlTnWgS°Inllonc Nr. Effluent Toxicity Report Form - Chronic Fathead Minnow Multi -Concentration Test Date: October 16, 2021 Facility: Environment 1, Inc. NPDES If: NC 0024244 Pipe 0: 001 County: Stanly City of Albemarle, Long Creek WWTP Laboratory Performing Test: Environmental Testing Solutio s, Inc., Certificate k 37 Comments Signature of Operator in Responsible Charge (ORC): DRC Phone / E-mail: 3 Y(� c�'(,e:,.�y ,.tc- -•<�-� Project 9: 16316 Signature of Laboratory Supervisor: Sample#: 211005.04, 211007.04, 211009.0 e-Mail to: ATForms.ATB@ncdenr.eov Test Organisms: Plmephales promelas Or Mail Original to: North Carolina Division of Water Resources supplier Water Sciences Section /Aquatic Toxicology Branch In-house culture 1621 Mail Service Center Begin hatch: 10.Oq-21 1452 Raleigh, NC 27699-1621 End hatch: iD-ofi-z1 ossa Test Start Date: I October 05, 2021 Control Organisms • Effluent 45% • Effluent 6Z5% %Effluent 90% Effluent 96% Effluent ]00% Water Quality Data Replicate number a Surviving number of larvae 10 10 10 10 Origina l number of larvae 1 10 1 10 10 10 Weight/original (mg/larvae) 1 0.822 1 0.712 0.684 0.814 Surviving number of larvae 1 10 1 10 10 10 Original number of larvae 10 10 10 10 weight/original (mg/larvae) 1 0.787 1 0.812 0.781 0.667 Surviving number of larvae 10 10 110 1D Original number of larvae 10 10 10 10 Weight/orlginai(mg/larvae) 0.726 0.726 0.702 0.676 surviving number of larvae 10 10 10 10 Original number of larvae 10 10 10 1 10 Welght/original (mg/larvaei 1 0.753 1 0.775 0.800 1 0.$25 Surviving number of larvae 10 10 1 10 10 Original number of larvae 10 1 10 1 10 10 Weight/original img/larvae) 0.825 0.820 0.773 0.795 surviving number of larvae 10 10 10 9 Original number of larvae 10 10 1 10 1 10 Welght/originallrndlarvae) 0.840 0.736 1 0.823 1 0.699 Survival (%) 100.0 Average wt (mg) 0.758 Averagewt/ 0,758 surviving (mg) Survival (%) 100.0 Average wt (mg) 0.762 survival (%) 100.0 Average wt (mg) survival (%) 100,0 Average wt(mg) Survival (%) 100.0 Averagewt(mg) 1 0.803 Survival (%) 97.5 Average wt(mg, 0.775 Day 0 Day 1 Day 2 Day 3 Day 4 Day 5 Day 6 Initial Final Initial Final Initial Flnai Initial Final Initial Final Initial Final Initial I Final Control PH (su): DO (mg/L): Temp. ('C): High Concentration PH (Su): DO (mg/L): Temp. (°C): 7.79 7.70 7.82 7.69 7.93 7.66 7.78 7.70 7.71 7.66 7.77 7,75 7.69 7.8 7.6 7.7 7.8 7.6 7.7 7.7 7.6 M�L 24.7 24.4 24.7 24.6 24.8 24.6 24.7 24.7 24.8 24.5 24.7 24.5 24.8 6.11 6.41 6.34 6.40 6,47 6.52 6.60 6.54 6.46 6.50 6.60 6.68 6.54 6.44 7.7 7.6 8.0 7.6 8.0 7.47.87.8 24,6 24.5 24.6 24.5 25.0 24.4 25.0 24.8 25.0 24.6 24.8 24.5 25.0 24.3 Sample Information Collection start date: Sample 1 Sample 2 Sample 3 Control Analyses 30.03.21 30.05-21 10-07-21 Survival Growth Yes Yes Yes Yes IOD% 100% >100% >300% >100% >100% Visual Insp. Dunnett's Survival Growth %Effluent Critical Calculated Critical Calculated 45% 2.410 -0.103 67.5% 2.410 1.390 90% 2.410 -0.833 95% 2.410 -1.246 100% 2.410 -0.454 Overall Analysis: Result; PASS LOEC: >100% NOEC: 100% ChV: >100% DWR Report Form AT-5 PO Box 7565 Asheville, NC 28802 Phone: (828) 350-9364 N Fax: (828) 350-9368 -: Fnvlmnmenral Tesring Solull°ns. arc Effluent Toxicity Report Form - Chronic Fathead Minnow Multi -Concentration Test Date: June 24, 2021 Facility: Environment 1, Inc. NPDES #: NC 0024244 Pipe #: 001 County: Stanly City of Albemarle, Long Creek WVVTP Laboratory Performing Test: Environmental Testing Solutions, Inc., Certificate # 037 Comments Signature of Operator in Responsible Charge (ORC): n c3 ORCPhone /E-mail:-';U'1-- - 2Z 3 Y 10 te-,'-1C. e'n--" Project#: 15994 Signature of Laboratory Supervisor: C.sample #: 210608.01, 210610.07, 210612.0 e-Mail to: ATForms.ATB(Zncdenr.eo Test Organisms: Pimepholes promelas Or Mail Original to: North Carolina Division of Water Resources Supplier Water Sciences Section / Aquatic Toxicology Branch In-house Culture 1621 Mail Service Center Begin hatch: 06-07-21 1500 Raleigh, NC 27699-1621 End hatch: o6-oa-zl osoo Test Start Date: June 08, 2021 Control Organisms % Effluent 45% Effluent 67.5% Effluent 90% Effluent 95% Effluent 100% Replicate number 1 7 1 A Surviving number of larvae 10 10 10 10 original number of larvae 10 10 10 10 Weight/original (mg/larvae) 0.992 1 1.043 1.098 1.064 Surviving number of larvae 1 10 10 10 10 original number of larvae 1 10 10 10 1 10 Weight/original (mg/larvae) 1 1.121 0.962 1 1.000 1 1.032 Surviving number of larvae 10 9 1C) 10 Original number of larvae 10 10 10 10 Weight/original (mg/larvae) 1.016 1 0.911 1 0.945 1 0.917 Surviving number of larvae 10 10 10 10 Original number of larvae 10 10 10 10 weight/original (mg/larvae) 0.974 1 1.071 0.995 0.931 Surviving number of larvae 1 10 1 9 1 10 1 9 Original number of larvae 1 10 1 10 1 10 1 10 weight/original (mg/larvae) 1 1.008 1 0.970 1 1.02$ 1 0.875 Surviving number of larvae 9 9 1 10 1 9 Original number of larvae 10 10 1 10 1 10 Weight/original (mg/larvae) 0.864 1 0.920 1 0.796 1 0.725 Survival (%) 100.0 Average wt (mg) 1.049 Averagewt/ 1 1.049 surviving (mg) Survival (%) 100.0 Average wt (mg) 1 1.029 Survival(%) 97.5 Average wt (mg) 0.947 Survival (%) 100.0 Average wt (mg) 1 0.993 Survival (%) 95.0 Average wt (mg) 0.970 Survival (%) Dm Average wt (mg) 1 0.826 Water Quality Data Day 0 Day 1 Day 2 Day 3 Day 4 Day 5 Day 6 Initial I Final Initial I Final Initial I Final Initial Final Initial Final Initial I Final Initial I Final Control pH (SU): DO (mg/LI: Temp. (°C): High Concentration pH (SU): DO (mg/L): Temp. (°C): 5.92 6.51 6.63 6.41 6.33 6.47 6.86 6.68 6.64 6.72 6.84 6.80 6.97 6.77 7.8 25.0 7.9 24.5 8.1 25.0 7.6 24.7 7.9 24.4 7.1 24.3 7,8 25.0 7.7 24.4 8.0 1 24.9 7.9 1 24.7 25.0 24.4 25.0 7.7 24.7 Sample Information Sample 1 Sample 2 Sample 3 Control Analyses Ofi-O6-21 06.08-21 06 10 21 Survival Growth Yes Yes Yes Yes 100% 95% >100% 100% >100% 97.5% Visual Insp. I Durrett's Survival Growth % Effluent Critical CalculatedM24 Calculated 45% 0AS8 67.5% 2.278 90% 1.262 95% 1.764 100% 4.980 Overall Analysis: Result: PASS LOEC: 100% NOEC: 95% ChV: 97.5% DWR Report Form AT-5 8.17 7.89 8.08 7.90 8.14 7.58 8.17 7.90 8.12 7.94 8.21 7,89 8.23 7.94 7.7 7.8 7,8 7.7 7.7 7.1 7.fi 7.8 7.9 7.9 7.8 7.7 7.9 7.5 24.8 24.4 24.7 24.6 24.7 24.8 24.7 24.6 24.7 24.6 24.8 24.4 24.8 24.6 n (= q 7 PO Box 7565 i 1 F Asheville, NC 28802 Phone: (828) 350-9364 Fax: (828) 350-9368 FnMonmennlTe;Ung toluUan; Me Effluent Toxicity Report Form - Chronic Fathead Minnow Multi -Concentration Test Date: January 01, 2022 Facility: Environment 1, Inc. NPDES r«: NC 0024244 Pipe #: 001 County: Stanly City of Albemarle, Long Creels W WTP Laboratory Performing Test: Environmental Testing Solutions, Inc.,.-Certjfjeate N 037 Comments Signature of Operator in es opsible Charge (ORC):�_ ORC Phone / E-mail: r �' ; ' r, ,, Project 0: 16481 Signature of Laboratory Supervisor: fG Sample #: 211207.01, 211209.01, 2I3111.0 e-Mail to: ATForms.ATBCdncdenr.gov Test Organisms: Pfinephales promelas Or Mail Original to: North Carolina Division of Water Resources Supplier Water Sciences Section / Aquatic Toxicology Branch In-house culture 1621 Mail Service Center Begin batch: 12-0fi-21 1502 Raleigh, NC 27699-1621 End hatch: 12-07-21 0600 Test Start Date: 1 December 07, 2021 Replicate number Control Organisms Effluent 45Y. Surviving number of larvae 10 10 10 10 Survival (%J 37� Average wt (mg) Average wt/ surviving (mg) survival (%) 100.0 Average wt (mg) 0.700 Original number of larvae 10 10 10 10 Weight/original (mg/larvae) 0.651 0.774 0.791 0.814 survivingnumberoflarvae 10 10 10 10 Original number of larvae 10 10 10 10 Weight/original(mg/farvae) 1 0.644 1 0.675 0.714 0.767 1 % Effluent 67.SYe % Effluent 90% • Effluent 95% % Effluent loll% Water Quality Data Survivingnumberoflarvae 10 1 10 10 10 Original numberof larvae 10 10 10 10 Weight/original(mg/larvae) 0.710 1 0.783 1 0.726 1 0.666 soMving number of larvae 10 10 10 10 Or(ginal numher of larvae 10 10 10 10 Weight/original(mg/larvae( j 0.861 1 0.804 1 0,707 0.694 Surviving number of larvae 1 10 1 10 1 10 10 Original number of larvae 10 10 10 10 Welght/original(mg/larvae) 1 0.727 1 0.792 1 0.742 1 0.737 Survivingnumberoflarvae 10 1 10 10 10 Original number of larvae 10 110 10 10 Weight/original (mg/larvae) 0.744 1 0.71IJ 0.765 1 0.804 survival (%) 0,0 10 Averagewt(mg) 1 0.721 Survival(%) 10060 Average wt (mg) 0.767 Survival (%) 100.0 Average wt (mg 0.750 Survival (%) 100.0 Average wt (mg) 0.756 Day D Day 1 Day 2 Day 3 Day 4 Day 5 Day 6 Initlai Final Initial Final Iriltlal Final Initial Final Initial Final Initial Final Initial Final Control PH (SU): DO (mg/L): Temp. (°C): High Concentration PH (5U): 00 (mg/L): Temp. (°C): 7.66 7.40 7.39 7.45 7.40 6.39 7.27 7.34 7.71 6,91 7.78 7.3B 7.70 7.62 7.7 7.6 7.8 7.9 7.8 7.4 7.7 BA 7.7 6.7 7.7 7.6 7.7 7,4 24.7 24.9 24.6 25.0 24.8 25.0 24.8 29.9 24,7 24.8 24.8 24.6 24.8 24.7 7.10 6.59 fi.63 6.68 6.63 6.54 6.74 6.63 6.42 6.67 6.97 6.99 7.04 6.78 7.8 7.6 7.8 7.8 8.2 7.4 8.1 6.6 8.0 6.7 8.0 7.8 8.1 7.9 25.6 24.9 24.7 24.9 25.0 24.8 24.7 25.0 29.6 25.0 25.0 24.6 24.7 24.6 Sample Information Collection start date: Sample 1 Sample 2 Sample 3 Control Analyses 12-05•21 12.07-21 12.09.21 Survival Growth Yes Yes Yes Yes 100% 100% >I00% >700% >100% >300% Visual Insp. Dunne[['s Survival Growth %Effluent Critical Calculated Critical Calculated 45% 2.910 67.5% 2.410 90% 2.410 A20 95% 2.41D 100% 2.410 Overall Analysis: Result: PASS LOEC: >100% NOEC: 100% ChV: >100% DWR Report Form AT-5 Process Narrative of City of Albemarle WWTP in support of NPDES renewal October, 2021 The Albemarle WWTP makes use of components of an older original plant combined with newer and larger components located at a separate area approximately 0.9 miles to the SSE and downstream on Long Creek. Because the plant is split in two, there are two process flow and mass balance diagrams but the two campuses work as a single unit. References for this narrative are the process flow diagrams; 004 LONG CREEK PLANT LAYOUT AND MASS FLOW DIAGRAM — UPPER PLANT.PDF 003 LONG CREEK PLANT LAYOUT AND MASS FLOW DIAGRAM — LOWER PLANT.PDF Referencing the upper flow diagram (004) we see what looks like a working wastewater treatment plant. This is the old original trickle bed plant that was retired; however, some components continue to operate such as the headworks, influent lift station, and primary and secondary solids holding basin. The Albemarle wastewater collection system gravity flows into the headworks, comprised of bar screens and grit chamber. The wastewater, cleared of large solids, then flows to the first of two influent lift stations "A" and "B". Also seen on the upper plant diagram are waste holding tanks. WAS from the lower plant enters two primary holding basins where it is gravity settled with the decant routed back to the first influent PS "A". The thickened WAS is then pumped over to the secondary solids holding tanks to await hauling for further processing. The screw lifts of the first influent lift station provide enough head to gravity flow the 0.9 miles to the second influent lift station located on the second campus. Referencing the lower flow diagram (003), we see that this site is comprised of an influent lift station "B", four aeration basins with six surface aerators each, four secondary clarifiers, tertiary filters, chlorine disinfection, and the plant discharge. The basins are laid out in pairs, in that the two basins to the southwest are a pair and the two basins to the northeast are a pair. This can be seen in the 003 flow diagram where half of the influent from lift station B goes to the splitter box of the southwestern pair (denoted as 0.5 Q) and the other half of the influent goes to the northeastern pair splitter box. Untreated flow from the headworks enters at the influent lift station B, where the multiple screws can partition the flow into one or the other or both splitter boxes located on the berm between pairs of the aeration basins. In this way the influent flow could go to either two or four aeration basins depending on conditions. Each aeration basin is equipped with its own clarifier for biosolids separation making each functionally independent. This also implies that if a problem or necessary shutdown were to occur with one basin, that the second of the pair could continue to operate. The pairs of clarifiers contribute their under flow to a single RAS/WAS lift station, therefore there are two RAS/WAS lift stations in the plant. The ratio of WAS to RAS can be set by adjusting the RPM of the lifting screws in the lift stations. The WAS flow from the WAS screws flows to a central WAS pump station that then pumps the total WAS flows back to the upper campus for decanting and solids separation and storage. The RAS flow from the lift stations goes back to the splitter boxes on the basin berm to distribute to the aeration basins. Overflow from the clarifiers flows to a single collection line that conducts the treated flow to tertiary filters for further solids removal. The effluent of the filters then falls into the disinfection chamber dosed with gaseous chlorine. The effluent then flows to an aeration tank for dichlorination and subsequently flows to the discharge point. ,4 ■ :• ■ O c.. ■ .. a � •Stanly County nimal Protective Services s "rip _[NFLUENT PS UNIT "A" OF 2 UNITS �V raw j� _ ::s� - ,...�I ■ 40, 41, 4- 401b v T `. \\ C �/Cm 'll •oil Lom• ffiAlbema le ity Wastewater Plant w 06 w v U) ROY COOPER Governor MICHAEL S. REGAN Secretary S. DANIEL SMITH Director Michael Ferris, City Manager City of Albemarle P. O. Box 190 Albemarle, NC 28002-0190 Dear Mr. Ferris: NORTH CAROLINA Environmental Quality November 2, 2020 Subject: SPECIAL ORDER BY CONSENT EMC SOC WQ S19-007 City of Albemarle — Long Creek WWTP NPDES Permit Number NCO024244 Collection System Permit WQCS00016 Stanly County The Division of Water Resources (DWR) hereby transmits for yourrecords a copy of the signed Special Order by Consent (SOC or the Order) approved by the Environmental Management Commission (EMC). The SOC was signed October 30, 2020 and will be effective beginning October 1, 2020. The terms and conditions of the Order are now in full effect, including those requiring submittal of written notice of compliance or non-compliance with any SOC schedule date. To cover water -quality maintenance costs, SOC fees include a $500.00 annual fee, pursuant to North Carolina General Statute 143-215.3D. If you have questions, please contact the operations staff at DWR's Mooresville Regional Office at (704) 663-1699, or contact me in the central office, Derek Denard [derek.denard@ncdenr.gov] at (919) 707-3618. Sincerely, Derek Denard, Environmental Specialist Division of Water Resources, NCDEQ Attachment: Copy EMC SOC WQ S19-007 cc: SOC Files cc: NPDES Files [Laserfiche] DWR/MRO Corey Basinger [corey.basinger@ncdenr.gov]; Roberto Scheller [roberto.scheller@ncdenr.gov] DWR/WQPS Christyn Fertenbaugh [christyn.fertenbaugh@ncdenr.gov] City of Albemarle -Michael Ferris [mferris@ci.albemarle.nc.us]; Judy Redwine, bredwine@ci.albemarle.nc.us] D E Q�� North Carolina Department of Environmental Quality Division of Water Resources 512 North Salisbury Street 1 1611 Mail Service Center I Raleigh, North Carolina 27699-1611 NORTH C OROLINA - oaPammem i Environmental auai� e ` 919.707.9000 NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION COUNTY OF STANLY IN THE MATTER OF ) NORTH CAROLINA ) NPDES PERMIT NO. NCO024244 ) PERMIT NO. WQCS00016 ) HELD BY ) THE CITY OF ALBEMARLE ) SPECIAL ORDER BY CONSENT EMC SOC WQ S19-007 Pursuant to provisions of North Carolina General Statute (G.S.)143-215.2 and G.S. 143-215.67, this Special Order by Consent is entered into by the City of Albemarle, hereinafter referred to as the City, and the North Carolina Environmental Management Commission, an agency of the State of North Carolina created by G.S. 143B-282, and hereinafter referred to as the Commission: 1. The City and the Commission hereby stipulate the following: (a) The City holds North Carolina NPDES Permit NCO024244 for operation of an existing wastewater treatment works and for making an outlet therefrom for the discharge of treated wastewater to Long Creek, Class C waters of this State in the Yadkin -Pee Dee River Basin. The City is unable to consistently comply with the final effluent limits, including Biochemical Oxygen Demand (BOD), Ammonia Nitrogen, Total Suspended Solids (TSS), and Fecal Coliform. The City is unable to comply with operational requirements as set forth in NPDES Permit NCO024244 due to high levels of inflow and infiltration entering the City's sewer lines, and the WWTP's inability to handle low influent concentrations of BOD. The City also holds North Carolina Collection System Permit WQCS00016 for operation of an existing wastewater collection system, but is unable to consistently comply with permit Condition 1.2 regarding sanitary sewer overflows (SSOs) as set forth in Collection System Permit WQCS00016. Compliance will require preparation of plans and specifications for collection system upgrades including, but not limited to, pump station upgrades/improvements and sewer lime (force main) rehabilitation to be conducted in three phases. (b) Noncompliance with final effluent limitations constitutes, causing, and contributing to pollution of the waters of this State named above, and the City is within the jurisdiction of the Commission as set forth in G.S. Chapter 143, Article 21. (c) The City has secured a grant or has otherwise secured financing for planning, design, and construction/repairs of the following: i. New or improved wastewater treatment and disposal system components as described in Attachment B which, once constructed and operated, will be sufficient to adequately convey and treat wastewater presently being discharged, to such an extent that the City will be able to comply with the final effluent limits and operational City of Albemarle — Long Creek WWTP EMC SOC WQ S19-007 Page 2 of 6 requirements as set forth in NPDES Permit NC0024244. ii. A new or improved wastewater collection system which, once constructed and operated, will be sufficient to adequately collect wastewater presently being made tributary to the collection system, within the Sanitary Sewer Rehab Phase 1, Phase 2, and Phase 3 such that the City will be able to comply with permit Condition 1.2 regarding sanitary sewer overflows (SSOs) as set forth in Collection System Permit WQCS00016. (d) Since this Special Order is by Consent, neither party will file a petition for a contested case or for judicial review concerning its terms. 2. The City, desiring to comply with the Permits identified in paragraph l(a) and 1(b) above, hereby agrees to do the following: (a) Undertake the following activities in accordance with the indicated time schedule: Scheduled Activity Due Date Submit Quarterly Progress Reports (see details in paragraph 2(b) below.) Beginning October 15, 2020 For Collection System Permit W CS00016: Complete Sanitary Sewer Rehab, Phase 1 December 31, 2014 (Met) Begin construction on Sanitary Sewer Rehab, Phase 2 July 31, 2019 (Met) Apply for funding for Sanitary Sewer Rehab, Phase 3 September 30, 2019 (Met) Receive Letter of Intent to Fund for Phase 3 March 31, 2020 (Met) Submit finished plans and specifications for review for Phase 3 September 30, 2021 Complete construction on Phase 2 November 30, 2020 Begin Construction and execute construction contract for Phase 3 March 31, 2022 Complete construction on Phase 3 March 31, 2023 Review infrastructure improvements for maintaining compliance September 30, 2023 Attain Compliance with the Collection System Permit September 30, 2023 For NPDES Permit NCO024244: Begin implementation or construction of WWTP improvements items in Attachment B. March 31, 2022 Complete construction of all WWTP improvements September 30, 2023 Attain Compliance with NPDES permit limits September 30, 2023 (b) The City will submit quarterly progress reports detailing the work and activities undertaken and completed on the upgrades to the collection system. The reports are to be submitted as follows: one copy must be mailed to the Mooresville Regional Office Supervisor, Division of Water City of Albemarle — Long Creek WWTP EMC SOC WQ S19-007 Page 3 of 6 Resources / Water Quality Regional Operations Section, 610 East Center Avenue, Suite 301, Mooresville, NC 28115, and one copy must be mailed to the Water Quality Permitting Section / NPDES,1617 Mail Service Center Raleigh, NC 27699-1617. The quarterly reports are due in each respective office no later than the fifteenth (15th) day of January, April, July, and October for the duration of this Order. (c) The City will comply with all terms and conditions of the permit except effluent limits for parameters identified in paragraph 1(a) above. See Attachment A for all current monitoring requirements and effluent limits, including interim effluent limits applicable to this Special Order by Consent. The City may also be required to monitor for other parameters, as deemed necessary by the Director, in future permits or administrative letters. During the time in which this Special Order by Consent is effective, the City shall comply with the interim effluent limits for Total Suspended Solids (TSS), Biochemical Oxygen Demand (BOD), Ammonia Nitrogen, and Fecal Coliform as listed in the table below. Under this SOC, only the parameters listed below have been modified from the most current NPDES Permit NCO024244 in effect for Outfall 001. Parameters Units Permit Limits Interim Limits Monthly Avg. Weekly Avg. Monthly Avg. Weekly Avg. BOD (s) mg/L 10.0 15.0 15.0 35.0 BOD (w) mg/L 20.0 30.0 25.0 35.0 TSS mg/L 30.0 45.0 35.0 50.0 Ammonia Nitrogen (s m /L 1.1 3.3 5.0 15.0 Ammonia Nitrogen w mg/L 2.6 7.8 5.0 15.0 Fecal Coliform #/100 mL 200* 400* 400* 800* s = summer (April 1 — October 31); w = winter (November 1 — March 31) * = geometric mean (d) No later than fifteen (15) calendar days after any date identified for accomplishment of any activity listed in 2(a) above, the City shall submit to the Water Quality Regional Operations Section Regional Supervisor for the Division of Water Resources' (DWR) Mooresville Regional Office written notice of compliance or noncompliance therewith. In the case of noncompliance, the notice shall include a statement of the reason(s) for noncompliance, remedial action(s) taken, and a statement identifying the extent to which subsequent dates or times for accomplishment of listed activities may be affected. (e) The City will continue to operate the wastewater treatment plant as best as possible to prevent/minimize any adverse impacts to the surface waters. 3. The City, desiring to comply with the Permits identified in paragraph l(a) above, hereby agrees to the following settlement of outstanding civil penalties, an upfront penalty, and stipulated penalties: (a) The City has outstanding civil penalty assessments that total $60,054.33. As settlement of all alleged violations of NPDES permit number NCO024244 and WQCS00016 prior to City of Albemarle — Long Creek WWTP EMC SOC WQ S19-007 Page 4 of 6 entering into this Special Order by Consent, the City agrees to pay an upfront penalty amount of $1,679.33, with the remaining amount of $58,375.00 to be held in abeyance until the successful completion of this SOC. (b) At the successful conclusion of this Special Order by Consent, the penalty amount held in abeyance ($58,375.00) will be remitted. Should the Special Order by Consent not reach a successful conclusion, the full remaining penalty amount of $58,375.00 will be due immediately by check payable to the North Carolina Department of Environmental Quality and forwarded to the Director. (c) The City agrees that unless excused under paragraph four (4), the City will pay the Director of DWR, by check payable to the North Carolina Department of Environmental Quality, stipulated penalties according to the following schedule for failure to meet the deadlines set out in paragraphs 2(a), 2(b), and 2(d); and interim effluent limits and monitoring requirements set out in paragraph 2(c): Violation Description I Stipulated Penalty For Collection Sys mPermit W CS00016. • $250 per SSO greater than 1,000 gallons Any reportable Sanitary Sewer Overflow and less than 100,000 gallons. (to be (SSO) paid on a monthly basis) • $500 per SSO greater than 100,001 gallons to be paid on a monthly basis • $250 per bypass less than 100,000 Any reportable bypass gallons (to be paid on a monthly basis) • $500 per bypass greater than 100,001 gallons to be paid on a monthly basis For NPDESPermit NCO024244: Failure to meet a scheduled date $1,000 per day • $1,000 for exceeding monthly average Failure to comply with a modified effluent (or geometric mean) limit limit • $500 for exceeding weekly average (or geometric mean) limits (to be paid on a monthly basis Monitoring frequency violations for $100 per omitted value per parameter (to modified parameters be paid on a monthly basis) $1,000 for the first violation; penalty Failure to Submit Status Reports doubles with each subsequent assessment for late reports Failure to achieve compliance with final $5,000 (single penalty) effluent limits (d) Certified checks are to be made payable to the North Carolina Department of Environmental Quality and forwarded to Director of DWR at 1617 Mail Service Center, Raleigh, North Carolina 27699-1617. City of Albemarle — Long Creek WWTP EMC SOC WQ S19-007 Page 5 of 6 4. The City and the Commission agree that the stipulated penalties are not due if the City satisfies DWR that noncompliance was caused solely by: a. An act of God; b. An act of war; c. An intentional act or omission of a third party, but this defense shall not be available if the act or omission is that of an employee or agent of the defendant or if the act or omission occurs in connection with a contractual relationship with the permittee; d. An extraordinary event beyond the permittee's control. Contractor delays or failure to obtain funding will not be considered as events beyond the permittee's control; or e. Any combination of the above causes. Failure within thirty (30) days of receipt of written demand to pay the penalties, or challenge them by a contested case petition pursuant to G.S. 15013-23, will be grounds for a collection action, which the Attorney General is hereby authorized to initiate. The only issue in such an action will be whether the thirty (30) days has elapsed. 5. Noncompliance with the terms of this Special Order by Consent is subject to enforcement action in addition to the above stipulations, including injunctive relief pursuant to G.S. 143- 215.6.C. 6. This Special Order by Consent and any terms or conditions contained herein, hereby supersede any and all previous Special Orders, Enforcement Compliance Schedule Letters, terms, conditions, and limits contained therein issued in connection with NPDES permit number NCO024244 and Collection System Permit WQCS00016. In the event of an NPDES permit modification or renewal, any effluent limit or monitoring requirements contained therein shall supersede those contained in Attachment A of this Special Order by Consent, except as modified and contained in paragraph 2(c) above. 7. This Special Order by Consent maybe amended provided the City has made good faith efforts to secure funding, complete all construction and achieve compliance within the dates specified. 8. During the term of this Special Order by Consent, the City will not be permitted to accept additional wastewater from any domestic, industrial, or commercial sources without prior approval from the Mooresville Regional Supervisor and the Water Quality Permitting Section. City of Albemarle — Long Creek WWTP EMC SOC WQ S19-007 Page 6 of 6 9. Failure to meet the scheduled date identified in paragraph 2(a) may terminate this Special Order by Consent and require the City to comply with the terms and conditions contained in the permits identified in paragraph 1(a). 10. The City, upon signature of this Special Order by Consent, will be expected to comply with all schedule dates, terms, and conditions of this document. This Special Order by Consent shall expire December 31, 2023. For the City of Albemarle: I r Michael Ferris, City Manager l' M4 Z020 Date For the North Carolina Environmental Management Commission: S. Daniel Smith, Director Date Division of Water Resources ATTACHMENT A PermitNC0024244 EMC SOC WQ S19-007 Part I A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (12.0 MGD INTERIM) [15A NCAC 0213.0400 et seq., 15A NCAC 02B.0500 et seq.] Grade IV Biological Water Pollution Control System [15A NCAC 08G .0302] a. During the period beginning on the effective date of this permit and lasting until expiration, the Permittee is authorized to discharge treated wastewater from Outfall 001. Such discharges shall be limited and monitored 1 by the Permittee as specified below: EFFLUENTLIMITS MONITORING REQUIREMENTS PARAMETER CHARACTERISTICS Parameter Code Monthly Weekly Daily Measurement Sample Sample Average Average Maximum Frequency Type Location2 Flow 50050 12.0 MGD Continuous Recording Influent or Effluent BOD, 5-day, (20°C) 3 C0310 15.0 mglL* 35.0 mglL* Daily Composite Influent and (April 1 -October 31) Effluent BOD, 5-day, (20°C) 3 C0310 25.0 mg/L* 35.0 mg/L* Daily Composite Influent and (November 1 - March 31) Effluent Total Suspended Solids C0530 35.0 mglL* 50.0 mglL* Daily Composite Influent and (TSS) 3 Effluent NH3 as N C0610 (April 1 -October 31) 5.0 mg/L* 15.0 mg/L* Daily Composite Effluent NH3 as N C0610 (November 1 - March 31) 5.0 mg/L* 15.0 mg/L* Daily Composite Effluent Dissolved Oxygen (DO) 00300 Daily Average > 5.0 mg/L Daily Grab Effluent Fecal Coliform 31616 4001100 mL* 8001100 mL* Daily Grab Effluent (geometric mean) Total Residual Chlorine 50060 (TRC) 4 18 Ng/L Daily Grab Effluent Temperature (°C) 00010 Monitor and Report Daily Grab Effluent Total Nitrogen C0600 Monitor and Report Monthly Calculated Effluent (NO2+NO3+TKN) (mg/L) Total Phosphorus (mg/L) C0665 Monitor and Report Monthly Composite Effluent Chronic Toxicity 5 TGP38 Ceriodaphnia dubia Pass/Fail at 90% Quarter) y Composite p Effluent effluent Conductivity (pmhos/cm) 00094 Monitor and Report Daily Grab Effluent Total Hardness (as CaCO3) 6 00900 Monitor and Report Quarterly Composite Effluent (mg/L) Total Cadmium 6,7 01027 2.2 fag/L 16.0 pg/L Monthly Composite Effluent Total Chromium 6,8 01034 Monitor and Report Monthly Composite Effluent Chromium VI 6,8 01032 Monitor and Report Monthly Composite Effluent Total Copper 6,8 01042 Monitor and Report Monthly Composite Effluent Total Silver 6, 9 (Ng/L) 01077 Monitor and Report Quarterly Composite Effluent Page 1 of 6 ATTACHMENT A PermitNC0024244 EMC SOC WQ S19-007 Bis (2-ethylhexyl) Phthalate 39100 (N g/L) Monitor and Report Quarterly Grab Effluent Color (ADMI) 10 00083 Monitor and Report 2/Month Composite Effluent pH 00400 Between 6.0 and 9.0 standard units Daily Grab Effluent Effluent Pollutant Scan NC01 Monitor and Report Footnote 11 Footnote 11 Effluent Total Hardness (as CaCO3)12 00900 (mg/L) Monitor and Report Quarterly Grab U Conductivity (pmhoslcm) 00094 Monitor and Report Variable 2 Grab U, D1, D2 Dissolved Oxygen (DO) (mg/L) 00300 Monitor and Report Variable 2 Grab U, D1, D2 Temperature (°C) 00010 Monitor and Report Variable 2 Grab U, D1, D2 Total Copper (Ng/L) 01042 Monitor and Report Monthly Grab U, D1, D2 Color (ADMI) 00083 Monitor and Report 2/Month Grab U, D3 SOC Limits are effective beginning on the effective date of the SOC and lasting until the SOC compliance date on September 30, 2023. The SOC shall expire on December 31, 2023. Footnotes: 1. The Permittee shall submit discharge monitoring reports electronically using the NC DWR's eDMR application system; see Section A. (9.). 2. U = at least 100 feet above the discharge point. D 1 = approximately 2620 feet below the discharge point. D2 = 3.9 miles downstream at NCSR 1967. D3 = approximately 200 yards downstream from the discharge point, for color samples only. Stream samples shall be collected monthly from October 1 through May 30, and weekly from June 1 through September 30. 3. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15% of the respective influent value (8 5 % removal). 4. The Division shall consider all effluent TRC values reported below 50 µg/L to be in compliance with the permit. However, the Permittee shall continue to record and submit all values reported by a North Carolina certified laboratory (including field certified), even if these values fall below 50 µg/L. 5. Whole Effluent Toxicity shall be monitored using the Pass/Fail Chronic Toxicity test with Ceriodaphnia dubia at 90% effluent. Samples shall be taken in March, June, September, and December•, see Section A. (4.). 6. Effluent Hardness samples shall coincide with sampling of metals. 7. These interim limitations for Total Cadmium shall be complied with until September 1, 2025. 8. Total Chromium, Chromium VI and Total Copper shall be monitored until limits for Chromium VI and Total Copper in Section A. (2.) become effective September 1, 2025. Total Chromium monitoring is to determine the proportion of Chromium VI in Total Chromium. 9. Total Silver shall be monitored using "clean" sampling techniques and reported to the lower reporting level of the procedure. 10. See Section A. (6.) for Color Reopener and Monitoring Requirements. 11. The Permittee shall perform three Effluent Pollutant Scans during the term of this permit; see Section A. (5.). 12. The Permittee shall sample instream hardness, upstream of the facility's discharge. The sample shall be representative of the hardness in the receiving stream. b. There shall be no discharge of floating solids or visible foam in other than trace amounts. Page 2 of 6 ATTACHMENT A PermitNC0024244 EMC SOC WQ S19-007 A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (12.0 MGD FINAL) [15A NCAC 0213.0400 et seq., 15A NCAC 02B.0500 et seq.] Grade IV Biological Water Pollution Control System [15A NCAC 08G .0302] a. During the period beginning September 1, 2025 and lasting until expansion above 12.0 MGD (and receipt of the Engineer's Certificate of completion) or expiration, whichever is sooner, the Permittee is authorized to discharge treated wastewater from Outfall 001. Such discharges shall be limited and monitored 1 by the Permittee as specified below: EFFLUENTLIMITS MONITORING REQUIREMENTS PARAMETER CHARACTERISTICS Monthly Weekly Daily Measurement Sample Sample Parameter Code Average Average Maximum Frequency Type Location Flow 50050 12.0 MGD Continuous Recording Influent or Effluent BOD, 5-day, (20°C) 3 Influent and C0310 (April 1 -October 31) 15.0 mg/L* 35.0 mg/L* Daily Composite Effluent BOD, 5-day, (20°C) 3 Influent and C0310 (November 1- March 31) 25.0 mg/L* 35.0 mg/L* Daily Composite Effluent Total Suspended Solids (TSS) 3 C0530 35.0 mg/L* 50.0 mg/L* Daily Composite Influent and Effluent NH3 as N (April 1 -October 31) C0610 5.0 mg/L* 15.0 mg/L* Daily Composite Effluent NH3 as N (November 1 March 31) C0610 5.0 mg/L* 15.0 mg/L* Daily Composite Effluent Dissolved Oxygen (DO) 00300 Daily Average > 5.0 mg/L Daily Grab Effluent Fecal Coliform (geometric mean) 31616 400/100 mL* 800/100 mL* Daily Grab Effluent Total Residual Chlorine (TRC)4 50060 18 pg/L Daily Grab Effluent Temperature (°C) 00010 Monitor and Report Daily Grab Effluent Total Nitrogen (NO2+NO3+TKN) C0600 Monitor and Report Monthly Calculated Effluent (mg/L) Total Phosphorus (mg/L) C0665 Monitor and Report Monthly Composite Effluent Chronic Toxicity 5 TGP38 Ceriodaphnia dubia Pass/Fail at 90% Quarterly Composite Effluent effluent Conductivity (pmhos/cm) 00094 Monitor and Report Daily Grab Effluent Total Hardness (as CaCO3) 6 00900 Monitor and Report Quarterly Composite Effluent (mg/L) Total Cadmium 6 01027 1.12 Hg/L 6.62 pg/L Monthly Composite Effluent Total Chromium 6(pg/L) 01034 Monitor and Report Monthly Composite Effluent Chromium VI 6 01032 11.9 Hg/L 17.2 pg/L Monthly Composite Effluent Total Copper 6 01042 16.09 pg/L 22.52 Ng/L Monthly Composite Effluent Total Silver 6,7(pg/L) 01077 Monitor and Report Quarterly Composite Effluent Bis (2-ethylhexyl) Phthalate 39100 Monitor and Report Quarterly Grab Effluent (N g/L) Color (ADMI) 8 00083 Monitor and Report 2/Month Composite Effluent pH 00400 Between 6.0 and 9.0 standard units Daily Grab Effluent Effluent Pollutant Scan NC01 Monitor and Report Footnote 9 Footnote 9 Effluent Page 3 of 6 ATTACHMENT A PermitNC0024244 EMC SOC WQ S19-007 Total Hardness (as CaCO3)10 00900 (mg/L) Monitor and Report Quarterly Grab U Conductivity (pmhos/cm) 00094 Monitor and Report Variable 2 Grab U, D1, D2 Dissolved Oxygen (DO) (mg/L) 00300 Monitor and Report Variable 2 Grab U, D1, D2 Temperature (°C) 00010 Monitor and Report Variable 2 Grab U, D1, D2 Total Copper (Ng/L) 01042 Monitor and Report Monthly Grab U, D1, D2 Color (ADMI) 00083 Monitor and Report 2/Month Grab U, D3 SOC Limits are effective beginning on the effective date of the SOC and lasting until the SOC compliance date on September 30, 2023. The SOC shall expire on December 31, 2023. Footnotes: 1. The Permittee shall submit discharge monitoring reports electronically using the NC DWR's eDMR application system; see A. (9.). 2. U = at least 100 feet above the discharge point. D 1 = approximately 2620 feet below the discharge point. D2 = 3.9 miles downstream at NCSR 1967. D3 = approximately 200 yards downstream from the discharge point, for color samples only. Stream samples shall be collected monthly from October 1 through May 30, and weekly from June 1 through September 30. 3. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15% of the respective influent value (8 5 % removal). 4. The Division shall consider all effluent TRC values reported below 50 µg/L to be in compliance with the permit. However, the Permittee shall continue to record and submit all values reported by a No rth Caro lina certified laboratory (including field certified), even if these values fall below 50 µg/L. 5. Whole Effluent Toxicity shall be monitored using the Pass/Fail Chronic Toxicity test with Ceriodaphnia dubia at 90% effluent. Samples shall be taken in March, June, September, and December; see Section A. (4.). 6. Effluent Hardness samples shall coincide with sampling of metals. 7. Total Silver shall be monitored using "clean" sampling techniques and reported to the lower reporting level of the procedure. 8. See Section A. (6.) for Color Reopener and Monitoring Requirements. 9. The Permittee shall perform three Effluent Pollutant Scans during the term of this permit; see Section A. (5.). 10. The Permittee shall sample instream hardness, upstream of the facility's discharge. The sample shall be representative of the hardness in the receiving stream. b. There shall be no discharge of floating solids or visible foam in other than trace amounts. Page 4 of 6 ATTACHMENT A PermitNC0024244 EMC SOC WQ S19-007 A. (3.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (16.0 MGD) [15A NCAC 02B.0400 et seq., 15A NCAC 0213.0500 et seq.] Grade IV Biological Water Pollution Control System [15A NCAC 08G .0302] a. During the period beginning on expansion above 12.0 MGD and lasting until expiration, the Permittee is authorized to discharge treated wastewater from Outfall 001. Such discharges shall be limited and monitored) by the Permittee as specified below: EFFLUENT LIMITS MONITORING REQUIREMENTS PARAMETER CHARACTERISTICS Monthly Weekly Daily Measurement Sample Sample Parameter Code Average Average Maximum Frequency Type Location Flow 50050 16.0 MGD Continuous Recording Influent or Effluent BOD, 5-day, (20°C) 3 Influent and C0310 (April 1 -October 31) 15.0 mg/L* 35.0 mg/L* Daily Composite Effluent BOD, 5-day, (20°C) 3 Influent and C0310 (November 1- March 31) 25.0 mg/L* 35.0 mg/L* Daily Composite Effluent Total Suspended Solids Influent and (TSS) 3 C0530 35.0 mg/L* 50.0 mg/L* Daily Composite Effluent NH3 as N (April 1 -October 31) C0610 5.0 mg/L* 15.0 mg/L* Daily Composite Effluent NH3 as N (November 1 March 31) C0610 5.0 mg/L* 15.0 mg/L* Daily Composite Effluent Dissolved Oxygen (DO) 00300 Daily Average > 5.0 mg/L Daily Grab I Effluent Fecal Coliform 31616 (geometric mean) 400/100 mL* 800/100 mL* Daily Grab Effluent Total Residual Chlorine (TRC) 4 50060 18 pg/L Daily Grab Effluent Temperature (°C) 00010 Monitor and Report Daily Grab Effluent Total Nitrogen C0600 Monitor and Report Monthly Calculated Effluent (NO2+NO3+TKN) (mg/L) Total Phosphorus (mg/L) C0665 Monitor and Report Monthly Composite Effluent Chronic Toxicity 5 TGP38 Monitor and Report Quarterly Composite Effluent Conductivity (pmhoslcm) 00094 Monitor and Report Daily Grab Effluent rdn [ Hardness- Total as CaCO3 or + Mg)] 6 (m00900 (CaTotal Monitor and Report Quarterly Composite Effluent Cadmium 6 01027 1.1 pg/L 6.5 pg/L Monthly Composite Effluent Total Chromium 6(pg/L) 01034 Monitor and Report Monthly Composite Effluent Chromium VI 6 01032 11.7 Ng/L 16.9 pg/L Monthly Composite Effluent Total Copper 6 01042 15.78 pg/L 22.15 lug/L Monthly Composite Effluent Total Silver 6,7 (Ng/L) 01077 Monitor and Report Quarterly Composite Effluent Bis (2-ethylhexyl) Phthalate 39100 Monitor and Report Quarterly Grab Effluent (ug/L) Color (ADMI) 8 00083 Monitor and Report 2/Month Composite Effluent pH 00400 Between 6.0 and 9.0 standard units Daily Grab I Effluent Effluent Pollutant Scan NC01 Monitor and Report Footnote 9 Footnote 9 1 Effluent Page 5 of 6 ATTACHMENT A PermitNC0024244 EMC SOC WQ S19-007 Hardness- Total as [CaCO3 00900 Monitor and Report Quarterly Grab U or (Ca + Mg)] 10 (mg/L) Conductivity 00094 Monitor and Report Variable 2 Grab U, D1, D2 Dissolved Oxygen (DO) 00300 Monitor and Report Variable 2 Grab U, D1, D2 (mg/L) Temperature (°C) 00010 Monitor and Report Variable 2 Grab U, D1, D2 Total Copper (pg/L) 01042 Monitor and Report Monthly Grab U, D1, D2 Color (ADMI) 00083 Monitor and Report 2/Month Grab U, D3 * SOC Limits are effective beginning on the effective date of the SOC and lasting until the SOC compliance date on September 30, 2023. The SOC shall expire on December 31, 2023. Footnotes: 1. The Permittee shall submit discharge monitoring reports electronically using the NC DWR's eDMR application system; see Section A. (9.). 2. U = at least 100 feet above the discharge point. D 1 = approximately 2620 feet below the discharge point. D2 = 3.9 miles downstream at NCSR 1967. D3 = approximately 200 yards downstream from the discharge point, for color samples only. Stream samples shall be collected monthly from October 1 through May 3 0, and weekly from June 1 through September 30. 3. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15% of the respective influent value (8 5 % removal). 4. The Division shall consider all effluent TRC values reported below 50 µg/L to be in compliance with the permit. However, the Permittee shall continue to record and submit all values reported by a No rth Caro lina certified laboratory (including field certified), even if these values fall below 50 µg/L. 5. Whole Effluent Toxicity shall be monitored using the Pass/Fail Chronic To xic ity te st with Ceriodaphnia dubia at 90% effluent. Samples shall be taken in March, June, September, and December; see Section A. (4.). 6. Effluent Hardness samples shall coincide with sampling of metals. 7. Total Silver shall be monitored using "clean" sampling techniques and reported to the lower reporting level of the procedure. 8. See Section A. (6.) for Color Reopener and Monitoring Requirements. 9. The Permittee shall perform three Effluent Pollutant Scans during the term of this permit; see Section A. (5.). 10. The Permittee shall sample instream hardness, upstream of the facility's discharge. The sample shall be representative of the hardness in the receiving stream. b. There shall be no discharge of floating solids or visible foam in other than trace amounts. Page 6 of 6 ATTACHMENT B EMC SOC WQ S19-007 City of Albemarle — Long Creek WWTP Improvements Brief Proiect Description The Long Creek WWTP improvements will include implementation and/or construction of the following items: • Perform electrical upgrades to the electrical grid at the WWTP to ensure reliability of WWTP in accordance with 15A NCAC 2H .0124. • Conduct engineering study of hydraulic loading to individual waste treatment trains to operate aeration basin and secondary clarifier train independently of other treatment trains to accommodate fluctuating flows into WWTP. • Perform necessary construction, piping, and valving to operate each treatment train independently of each other. Page 1 of 1 NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION COUNTY OF STANLY IN THE MATTER OF ) NORTH CAROLINA ) NPDES PERMIT NO. NCO024244 ) PERMIT NO. WQCS00016 ) HELD BY ) THE CITY OF ALBEMARLE ) SPECIAL ORDER BY CONSENT EMC SOC WQ S19-007 Ad I Pursuant to provisions of North Carolina General Statute (G.S.) 143-215.2 and G.S. 143-215.67, this amendment to a Special Order by Consent is entered into by the City of Albemarle, hereinafter referred to as the City, and the North Carolina Environmental Management Commission, an agency of the State of North Carolina created by G.S. 14313-282, and hereinafter referred to as the Commission: 1. The City and the Commission hereby stipulate the following: (a) The City holds North Carolina NPDES Permit NCO024244 for operation of an existing wastewater treatment works and for making an outlet therefrom for the discharge of treated wastewater to Long Creek, Class C waters of this State in the Yadkin -Pee Dee River Basin. The City is unable to consistently comply with the final effluent limits, including Biochemical Oxygen Demand (BOD), Ammonia Nitrogen, Total Suspended Solids (TSS), and Fecal Coliform. The City is unable to comply with operational requirements as set forth in NPDES Permit NCO024244 due to high levels of inflow and infiltration entering the City's sewer lines, and the WWTP's inability to handle low influent concentrations of BOD. The City also holds North Carolina Collection System Permit WQCS00016 for operation of an existing wastewater collection system, but is unable to consistently comply with permit Condition 1.2 regarding sanitary sewer overflows (SSOs) as set forth in Collection System Permit WQCS00016. Compliance will require preparation of plans and specifications for collection system upgrades including, but not limited to, pump station upgrades/improvements and sewer line (force main) rehabilitation to be conducted in three phases. (b) Noncompliance with final effluent limitations constitutes, causing, and contributing to pollution of the waters of this State named above, and the City is within the jurisdiction of the Commission as set forth in G.S. Chapter 143, Article 21. (c) The City has secured a grant or has otherwise secured financing for planning, design, and construction/repairs of the following: i. New or improved wastewater treatment and disposal system components as described in Attachment B which, once constructed and operated, will be sufficient to adequately convey and treat wastewater presently being discharged, to such an extent City of Albemarle — Long Creek WWTP EMC SOC WQ S 19-007 Ad I Page 2 of 6 that the City will be able to comply with the final effluent limits and operational requirements as set forth in NPDES Permit NC0024244. ii. A new or improved wastewater collection system which, once constructed and operated, will be sufficient to adequately collect wastewater presently being made tributary to the collection system, within the Sanitary Sewer Rehab Phase 1, Phase 2, and Phase 3 such that the City will be able to comply with permit Condition 1.2 regarding sanitary sewer overflows (SSOs) as set forth in Collection System Permit WQCS00016. (d) Since this Special Order is by Consent, neither parry will file a petition for a contested case or for judicial review concerning its terms. 2. The City, desiring to comply with the Permits identified in paragraph l(a) and l (b) above, hereby agrees to do the following: (a) Undertake the following activities in accordance with the indicated time schedule: Scheduled Activity Due Date Submit Quarterly Progress Reports (see details in paragraph 2(b) below.) Beginning October 15, 2020 (Ongoing) For Collection System Permit W CS00016: Complete Sanitary Sewer Rehab, Phase 1 December 31, 2014 (Met) Begin construction on Sanitary Sewer Rehab, Phase 2 July 31, 2019 (Met) Apply for funding for Sanitary Sewer Rehab, Phase 3 September 30, 2019 (Met) Receive Letter of Intent to Fund for Phase 3 March 31, 2020 (Met) Submit finished plans and specifications for review for Phase 3 September 30, 2021 (Met) Complete construction on Phase 2 November 30, 2020 (Met) Begin Construction and execute construction contract for Phase 3 January 31, 2023 Complete construction on Phase 3 June 30, 2024 Review infrastructure improvements for maintaining compliance November 30, 2024 Attain Compliance with the Collection System Permit November 30, 2024 For NPDES Permit NCO024244: Begin implementation or construction of WWTP improvements items in Attachment B. July 31, 2024 Complete construction of all WWTP improvements February 28, 2026 Attain Compliance with NPDES permit limits May 31, 2026 (b) The City will submit quarterly progress reports detailing the work and activities undertaken and completed on the upgrades to the collection system. The reports are to be submitted as follows: City of Albemarle — Long Creek WWTP EMC SOC WQ S 19-007 Ad I Page 3 of 6 one copy must be mailed to the Mooresville Regional Office Supervisor, Division of Water Resources / Water Quality Regional Operations Section, 610 East Center Avenue, Suite 301, Mooresville, NC 28115, and one copy must be mailed to the Water Quality Permitting Section / NPDES,1617 Mail Service Center Raleigh, NC 27699-1617. The quarterly reports are due in each respective office no later than the fifteenth (15th) day of January, April, July, and October for the duration of this Order. (c) The City will comply with all terms and conditions of the permit except effluent limits for parameters identified in paragraph 1(a) above. See Attachment A for all current monitoring requirements and effluent limits, including interim effluent limits applicable to this Special Order by Consent. The City may also be required to monitor for other parameters, as deemed necessary by the Director, in future permits or administrative letters. During the time in which this Special Order by Consent is effective, the City shall comply with the interim effluent limits for Total Suspended Solids (TSS), Biochemical Oxygen Demand (BOD), Ammonia Nitrogen, and Fecal Coliform as listed in the table below. Under this SOC, only the parameters listed below have been modified from the most current NPDES Permit NCO024244 in effect for Outfall 001. Parameters Units Permit Limits Interim Limits Monthly Avg. Weekly Avg. Monthly Avg. Weekly Avg. BOD s m /L 10.0 15.0 15.0 35.0 BOD w m /L 20.0 30.0 25.0 35.0 TSS m /L 30.0 45.0 35.0 50.0 Ammonia Nitrogen (s m /L 1.1 3.3 5.0 15.0 Ammonia Nitrogen w m /L 2.6 7.8 5.0 15.0 Fecal Coliform #/100 mL 200* 400* 400* 800* s = summer (April 1 — October 31); w = winter (November 1 — March 31) * = geometric mean (d) No later than fifteen (15) calendar days after any date identified for accomplishment of any activity listed in 2(a) above, the City shall submit to the Water Quality Regional Operations Section Regional Supervisor for the Division of Water Resources' (DWR) Mooresville Regional Office written notice of compliance or noncompliance therewith. In the case of noncompliance, the notice shall include a statement of the reason(s) for noncompliance, remedial action(s) taken, and a statement identifying the extent to which subsequent dates or times for accomplishment of listed activities may be affected. (e) The City will continue to operate the wastewater treatment plant as best as possible to prevent/minimize any adverse impacts to the surface waters. 3. The City, desiring to comply with the Permits identified in paragraph l(a) above, hereby agrees to the following settlement of outstanding civil penalties, an upfront penalty, and stipulated penalties: (a) The City has outstanding civil penalty assessments that total $60,054.33. As settlement of City of Albemarle — Long Creek WWTP EMC SOC WQ S 19-007 Ad I Page 4 of 6 all alleged violations of NPDES permit number NCO024244 and WQCS00016 prior to entering into this Special Order by Consent, the City agrees to pay an upfront penalty amount of $1,679.33, with the remaining amount of $58,375.00 to be held in abeyance until the successful completion of this SOC. (b) At the successful conclusion of this Special Order by Consent, the penalty amount held in abeyance ($58,375.00) will be remitted. Should the Special Order by Consent not reach a successful conclusion, the full remaining penalty amount of $58,375.00 will be due immediately by check payable to the North Carolina Department of Environmental Quality and forwarded to the Director. (c) The City agrees that unless excused under paragraph four (4), the City will pay the Director of DWR, by check payable to the North Carolina Department of Environmental Quality, stipulated penalties according to the following schedule for failure to meet the deadlines set out in paragraphs 2(a), 2(b), and 2(d); and interim effluent limits and monitoring requirements set out in paragraph 2(c): Violation Description I Stipulated alty For Collection Sys m Permit W CS00016: • $250 per SSO greater than 1,000 gallons Any reportable Sanitary Sewer Overflow and less than 100,000 gallons. (to be (SSO) paid on a monthly basis) • $500 per SSO greater than 100,001 gallons to be paid on a monthly basis • $250 per bypass less than 100,000 Any reportable bypass gallons (to be paid on a monthly basis) • $500 per bypass greater than 100,001 gallons to be paid on a monthly basis For NPDES Permit NCO024244: Failure to meet a scheduled date $1,000 per day • $1,000 for exceeding monthly average Failure to comply with a modified effluent (or geometric mean) limit limit • $500 for exceeding weekly average (or geometric mean) limits (to be paid on a monthly basis Monitoring frequency violations for $100 per omitted value per parameter (to modified parameters be paid on a monthly basis $1,000 for the first violation; penalty Failure to Submit Status Reports doubles with each subsequent assessment for late reports Failure to achieve compliance with final $5,000 (single penalty) effluent limits (d) Certified checks are to be made payable to the North Carolina Department of Environmental Quality and forwarded to Director of DWR at 1617 Mail Service Center, Raleigh, North Carolina 27699-1617. City of Albemarle — Long Creek WWTP EMC SOC WQ S 19-007 Ad I Page 5 of 6 4. The City and the Commission agree that the stipulated penalties are not due if the City satisfies DWR that noncompliance was caused solely by: a. An act of God; b. An act of war; An intentional act or omission of a third party, but this defense shall not be available if the act or omission is that of an employee or agent of the defendant or if the act or omission occurs in connection with a contractual relationship with the permittee; d. An extraordinary event beyond the permittee's control. Contractor delays or failure to obtain funding will not be considered as events beyond the permittee's control; or e. Any combination of the above causes. Failure within thirty (30) days of receipt of written demand to pay the penalties, or challenge them by a contested case petition pursuant to G.S. 15013-23, will be grounds for a collection action, which the Attorney General is hereby authorized to initiate. The only issue in such an action will be whether the thirty (30) days has elapsed. 5. Noncompliance with the terms of this Special Order by Consent is subject to enforcement action in addition to the above stipulations, including injunctive relief pursuant to G.S. 143- 215.6.C. 6. This Special Order by Consent and any terms or conditions contained herein, hereby supersede any and all previous Special Orders, Enforcement Compliance Schedule Letters, terms, conditions, and limits contained therein issued in connection with NPDES permit number NCO024244 and Collection System Permit WQCS00016. In the event of an NPDES permit modification or renewal, any effluent limit or monitoring requirements contained therein shall supersede those contained in Attachment A of this Special Order by Consent, except as modified and contained in paragraph 2(c) above. 7. This Special Order by Consent may be amended provided the City has made good faith efforts to secure funding, complete all construction and achieve compliance within the dates specified. 8. During the term of this Special Order by Consent, the City will not be permitted to accept additional wastewater from any domestic, industrial, or commercial sources without prior approval from the Mooresville Regional Supervisor and the Water Quality Permitting Section. City of Albemarle — Long Creek WWTP EMC SOC WQ S19-007 Ad I Page 6 of 6 9. Failure to meet the scheduled date identified in paragraph 2(a) may terminate this Special Order by Consent and require the City to comply with the terms and conditions contained in the permits identified in paragraph 1(a). 10. The City, upon signature of this Special Order by Consent, will be expected to comply with all schedule dates, terms, and conditions of this document. This Special Order by Consent shall expire August 31, 2026. For the City of Albemarle: :a , a Michael F ris, City Manager City of Albemarle 17 2o-Z L Date For the North Carolina Environmental Management Commission: Richard E. Rogers, Jr., Director Division of Water Resources Date ATTACHMENT A Permit NCO024244 EMC SOC WQ S19-007 Ad I Part I A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (12.0 MGD INTERIM) [15A NCAC 0213.0400 et seq., 15A NCAC 02B.0500 et seq.] Grade IV Biological Water Pollution Control System [15A NCAC 08G .0302] a. During the period beginning on the effective date of this permit and lasting until expiration, the Permittee is authorized to discharge treated wastewater from Outfall 001. Such discharges shall be limited and monitored i by the Permittee as specified below: EFFLUENT LIMITS MONITORING REQUIREMENTS PARAMETER CHARACTERISTICS Parameter Code Monthly Weekly Daily Measurement Sample Sample Average Average Maximum Frequency Type Location 2 Flow 50050 12.0 MGD Continuous RecordingInfluent or Effluent BOD, 5-day, (20°C) 3 C0310 15.0 mglL* 35.0 mglL* Daily Composite Influent and (April 1 - October 31) Effluent BOD, 5-day, (20°C) 3 C0310 25.0 mglL* 35.0 mglL* Daily Composite Influent and (November 1 - March 31) Effluent Total Suspended Solids (TSS) s C0530 35.0 mglL* 50.0 mglL* Daily Composite Influent and Effluent NH3 as N C0610 (April 1 - October 31) 5.0 mg/L* 15.0 mg/L* Daily Composite Effluent NH3 as N C0610 (November 1 - March 31) 5.0 mg/L* 15.0 mg/L* Daily Composite Effluent Dissolved Oxygen (DO) 00300 Daily Average > 5.0 mg/L Daily Grab Effluent Fecal Coliform 31616 (geometric mean) 4001100 mL* 800/100 mL* Daily Grab Effluent Total Residual Chlorine 50060 (TRC) 4 18 IL u9 Dail Y Grab Effluent Temperature (°C) 00010 Monitor and Report Daily Grab Effluent Total Nitrogen C0600 (NO2+NO3+TKN) (mg/L) Monitor and Report Monthly Calculated Effluent Total Phosphorus (mg/L) C0665 Monitor and Report Monthly Composite Effluent Chronic Toxicity 5 TGP38 Ceriodaphnia dubia Pass/Fail at 90% Quarterly Composite Effluent effluent Conductivity (pmhos/cm) 00094 Monitor and Report Daily Grab Effluent Total Hardness (as CaCO3) 6 00900 Monitor and Report Quarterly Composite Effluent (mg/L) Total Cadmium 6,7 01027 2.2 pg/L 16.0 pg/L Monthly Composite Effluent Total Chromium 6,8 01034 Monitor and Report Monthly Composite Effluent Chromium VI 6,8 01032 Monitor and Report Monthly Composite Effluent Total Copper 6, 8 01042 Monitor and Report Monthly Composite Effluent Total Silver 6,9 (pg/L) 01077 Monitor and Report Quarterly Composite Effluent Page 1 of 6 ATTACHMENT A Permit NCO024244 EMC SOC WQ S19-007 Ad I Bis (2-ethylhexyl) Phthalate 39100 (pg/L) Monitor and Report Quarterly Grab Effluent Color (ADMI) 10 00083 Monitor and Report 2/Month Composite Effluent pH 00400 Between 6.0 and 9.0 standard units Daily Grab Effluent Effluent Pollutant Scan NC01 Monitor and Report Footnote 11 Footnote 11 Effluent Total Hardness (as CaCO3)12 00900 (mg/L) Monitor and Report Quarterly Grab U Conductivity (lumhoslcm) 00094 Monitor and Report Variable 2 Grab U, D1, D2 Dissolved Oxygen (DO) (mg/L) 00300 Monitor and Report Variable 2 Grab U, D1, D2 Temperature (°C) 00010 Monitor and Report Variable 2 Grab U, D1, D2 Total Copper (pg/L) 01042 Monitor and Report Monthly Grab U, D1, D2 Color (ADMI) 00083 Monitor and Report 2/Month Grab U, D3 * SOC Limits are effective beginning on the effective date of the SOC and lasting until the SOC compliance date on May 31, 2026. The SOC shall expire on August 31, 2026. Footnotes: 1. The Permittee shall submit discharge monitoring reports electronically using the NC DWR's eDMR application system; see Section A. (9.). 2. U = at least 100 feet above the discharge point. D1 = approximately 2620 feet below the discharge point. D2 = 3.9 miles downstream at NCSR 1967. D3 = approximately 200 yards downstream from the discharge point, for color samples only. Stream samples shall be collected monthly from October 1 through May 30, and weekly from June I through September 30. 3. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15% of the respective influent value (85% removal). 4. The Division shall consider all effluent TRC values reported below 50 µg/L to be in compliance with the permit. However, the Permittee shall continue to record and submit all values reported by a North Carolina certified laboratory (including field certified), even if these values fall below 50 µg/L. 5. Whole Effluent Toxicity shall be monitored using the Pass/Fail Chronic Toxicity test with Ceriodaphnia dubia at 90% effluent. Samples shall be taken in March, June, September, and December•, see Section A. (4.). 6. Effluent Hardness samples shall coincide with sampling of metals. 7. These interim limitations for Total Cadmium shall be complied with until September 1, 2025. 8. Total Chromium, Chromium VI and Total Copper shall be monitored until limits for Chromium VI and Total Copper in Section A. (2.) become effective September 1, 2025. Total Chromium monitoring is to determine the proportion of Chromium VI in Total Chromium. 9. Total Silver shall be monitored using "clean" sampling techniques and reported to the lower reporting level of the procedure. 10. See Section A. (6.) for Color Reopener and Monitoring Requirements. 11. The Permittee shall perform three Effluent Pollutant Scans during the term of this permit; see Section A. (5.). 12. The Permittee shall sample instream hardness, upstream of the facility's discharge. The sample shall be representative of the hardness in the receiving stream. b. There shall be no discharge of floating solids or visible foam in other than trace amounts. Page 2 of 6 ATTACHMENT A Permit NCO024244 EMC SOC WQ S19-007 Ad I A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (12.0 MGD FINAL) [15A NCAC 0213.0400 et seq., 15A NCAC 0213.0500 et seq.] Grade IV Biological Water Pollution Control System [15A NCAC 08G .0302] a. During the period beginning September 1, 2025 and lasting until expansion above 12.0 MGD (and receipt of the Engineer's Certificate of completion) or expiration, whichever is sooner, the Permittee is authorized to discharge treated wastewater from Outfall 001. Such discharges shall be limited and monitored i by the Permittee as specified below: EFFLUENT LIMITS MONITORING REQUIREMENTS PARAMETER CHARACTERISTICS Monthly Weekly Daily Measurement Sample Sample Parameter Code Average Average Maximum Frequency Type Location 2 Flow 50050 12.0 MGD Continuous Recording Influent or Effluent BOD, 5-day, (20°C) 3 Influent and (April 1 -October 31) C0310 15.0 mglL* 35.0 mglL* Daily Composite Effluent BOD, 5-day, (20°C) 3 Influent and (November 1- March 31) C0310 25.0 mglL* 35.0 mglL* Daily Composite Effluent Total Suspended Solids (TSS) 3 C0530 35.0 mg/L* 50.0 mg/L* Daily Composite Influent and Effluent NH3 as N (April 1 -October 31) C0610 5.0 mg/L* 15.0 mg/L* Daily Composite Effluent NH3 as N C0610 (November 1- March 31) 5.0 mg/L* 15.0 mg/L* Daily Composite Effluent Dissolved Oxygen (DO) 00300 Daily Average > 5.0 mg/L Daily Grab Effluent Fecal Coliform 31616 (geometric mean) 4001100 ML* 8001100 mL* Daily Grab Effluent Total Residual Chlorine (TRC) 4 50060 18 pg/L Daily Grab Effluent Temperature (°C) 00010 Monitor and Report Daily Grab Effluent Total Nitrogen (NO2+NO3+TKN) C0600 Monitor and Report Monthly Calculated Effluent (mg/L) Total Phosphorus (mg/L) C0665 Monitor and Report Monthly Composite Effluent Chronic Toxicity 6 TGP38 Ceriodaphnia dubia Pass/Fail at 90% Quarterly Composite Effluent effluent Conductivity (pmhos/cm) 00094 Monitor and Report Daily Grab Effluent Total Hardness (as CaCO3) 6 00900 Monitor and Report Quarterly Composite Effluent (mg/L) Total Cadmium 6 01027 1.12 Ng/L 6.62 pg/L Monthly Composite Effluent Total Chromium 6 (pg/L) 01034 Monitor and Report Monthly Composite Effluent Chromium VI 6 01032 11.9 pg/L 17.2 lug/L Monthly Composite Effluent Total Copper 6 01042 16.09 pg/L 22.52 Ng/L Monthly Composite Effluent Total Silver 6,7 (pg/L) 01077 Monitor and Report Quarterly Composite Effluent Bis (2-ethylhexyl) Phthalate 39100 Monitor and Report Quarterly Grab Effluent (ug/L) Color (ADMI) 8 00083 Monitor and Report 2/Month Composite Effluent pH 00400 1 Between 6.0 and 9.0 standard units Daily I Grab I Effluent Effluent Pollutant Scan NC01 I Monitor and Report I Footnote 9 1 Footnote 9 1 Effluent Page 3 of 6 ATTACHMENT A Permit NCO024244 EMC SOC WQ S19-007 Ad I Total Hardness (as CaCO3) 10 00900 (mg/L) Monitor and Report Quarterly Grab U Conductivity (pmhos/cm) 00094 Monitor and Report Variable 2 Grab U, D1, D2 Dissolved Oxygen (DO) (mg/L) 00300 Monitor and Report Variable 2 Grab U, D1, D2 Temperature (°C) 00010 Monitor and Report Variable 2 Grab U, D1, D2 Total Copper(ug/L) 01042 Monitor and Report Monthly Grab U, D1, D2 Color (ADM 1) 00083 Monitor and Report 2/Month Grab U, D3 SOC Limits are effective beginning on the effective date of the SOC and lasting until the SOC compliance date on May 31, 2026. The SOC shall expire on August 31, 2026. Footnotes: 1. The Permittee shall submit discharge monitoring reports electronically using the NC DWR's eDMR application system; see A. (9.). 2. U = at least 100 feet above the discharge point. D1 = approximately 2620 feet below the discharge point. D2 = 3.9 miles downstream at NCSR 1967. D3 = approximately 200 yards downstream from the discharge point, for color samples only. Stream samples shall be collected monthly from October 1 through May 30, and weekly from June 1 through September 30. 3. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15% of the respective influent value (85% removal). 4. The Division shall consider all effluent TRC values reported below 50 µg/L to be in compliance with the permit. However, the Permittee shall continue to record and submit all values reported by a North Carolina certified laboratory (including field certified), even if these values fall below 50 µg/L. 5. Whole Effluent Toxicity shall be monitored using the Pass/Fail Chronic Toxicity test with Ceriodaphnia dubia at 90% effluent. Samples shall be taken in March, June, September, and December; see Section A. (4.). 6. Effluent Hardness samples shall coincide with sampling of metals. 7. Total Silver shall be monitored using "clean" sampling techniques and reported to the lower reporting level of the procedure. 8. See Section A. (6.) for Color Reopener and Monitoring Requirements. 9. The Permittee shall perform three Effluent Pollutant Scans during the term of this permit; see Section A. (5.). 10. The Permittee shall sample instream hardness, upstream of the facility's discharge. The sample shall be representative of the hardness in the receiving stream. b. There shall be no discharge of floating solids or visible foam in other than trace amounts. Page 4 of 6 ATTACHMENT A Permit NCO024244 EMC SOC WQ S19-007 Ad I A. (3.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (16.0 MGD) [15A NCAC 02B.0400 et seq., 15A NCAC 02B.0500 et seq.] Grade IV Biological Water Pollution Control System [15A NCAC 08G .0302] a. During the period beginning on expansion above 12.0 MGD and lasting until expiration, the Permittee is authorized to discharge treated wastewater from Outfall 001. Such discharges shall be limited and monitored' by the Permittee as specified below: EFFLUENT LIMITS MONITORING REQUIREMENTS PARAMETER CHARACTERISTICS Monthly Weekly Daily Measurement Sample Sample Parameter Code Average Average Maximum Frequency Type Location 2 Flow 50050 16.0 MGD Continuous Recording Influent or Effluent BOD, 5-day, (20°C) s Influent and (April 1 -October 31) C0310 15.0 mglL* 35.0 mglL* Daily Composite Effluent BOD, 5-day, (20°C) s Influent and (November 1- March 31) C0310 25.0 mglL* 35.0 mglL* Daily Composite Effluent Total Suspended Solids Influent and (TSS) s C0530 35.0 mglL* 50.0 mglL* Daily Composite Effluent NH3 as N (April 1 -October 31) C0610 5.0 mg/L* 15.0 mg/L* Daily Composite Effluent NH3 as N C0610 (November 1- March 31) 5.0 mg/L* 15.0 mg/L* Daily Composite Effluent Dissolved Oxygen (DO) 00300 Daily Average > 5.0 mg/L Daily Grab I Effluent Fecal Coliform 31616 (geometric mean) 400/100 mL* 8001100 mL* Daily Grab Effluent Total Residual Chlorine (TRC) a 50060 18 pg/L Daily Grab Effluent Temperature (°C) 00010 Monitor and Report Daily Grab Effluent Total Nitrogen C0600 (NO2+NO3+TKN) (mg/L) Monitor and Report Monthly Calculated Effluent Total Phosphorus (mg/L) C0665 Monitor and Report Monthly Composite Effluent Chronic Toxicity 5 TGP3B Monitor and Report Quarterly Composite Effluent Conductivity (pmhos/cm) 00094 Monitor and Report Daily Grab Effluent rdn s a Hardness- Total [CaCO3 as 00900 or + Mg)] (CaTotal Monitor and Report Quarterly Composite Effluent Cadmium 6 01027 1.1 lug/L 6.5 pg/L Monthly Composite Effluent Total Chromium 6 (pg/L) 01034 Monitor and Report Monthly Composite Effluent Chromium VI 6 01032 11.7 fag/L 16.9 pg/L Monthly Composite Effluent Total Copper 6 01042 15.78 lug/L 22.15 pg/L Monthly Composite Effluent Total Silver 6,7 (ug/L) 01077 Monitor and Report Quarterly Composite Effluent Bis (2-ethylhexyl) Phthalate 39100 Monitor and Report Quarterly Grab Effluent (Ng/L) Color (ADMI) 8 00083 Monitor and Report 2/Month Composite Effluent pH 00400 Between 6.0 and 9.0 standard units Daily Grab Effluent Effluent Pollutant Scan NC01 I Monitor and Report I Footnote 9 Footnote 9 Effluent Page 5 of 6 ATTACHMENT A Permit NCO024244 EMC SOC WQ S19-007 Ad I Hardness- Total as [CaCO3 00900 Monitor and Report p Quarter) y Grab U or (Ca + Mg)] 10 (mg/L) Conductivity 00094 Monitor and Report Variable 2 Grab U, D1, D2 Dissolved Oxygen (DO) 00300 Monitor and Report Variable 2 Grab U, D1, D2 (mg/L) Temperature (°C) 00010 Monitor and Report Variable 2 Grab U, D1, D2 Total Copper (pg/L) 01042 Monitor and Report Monthly Grab U, D1, D2 Color (ADMI) 00083 Monitor and Report 2/Month Grab U, D3 * SOC Limits are effective beginning on the effective date of the SOC and lasting until the SOC compliance date on May 31, 2026. The SOC shall expire on August 31, 2026. Footnotes: 1. The Permittee shall submit discharge monitoring reports electronically using the NC DWR's eDMR application system; see Section A. (9.). 2. U = at least 100 feet above the discharge point. D1 = approximately 2620 feet below the discharge point. D2 = 3.9 miles downstream at NCSR 1967. D3 = approximately 200 yards downstream from the discharge point, for color samples only. Stream samples shall be collected monthly from October 1 through May 30, and weekly from June 1 through September 30. 3. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15% of the respective influent value (85% removal). 4. The Division shall consider all effluent TRC values reported below 50 µg/L to be in compliance with the permit. However, the Permittee shall continue to record and submit all values reported by a North Carolina certified laboratory (including field certified), even if these values fall below 50 µg/L. 5. Whole Effluent Toxicity shall be monitored using the Pass/Fail Chronic Toxicity test with Ceriodaphnia dubia at 90% effluent. Samples shall be taken in March, June, September, and December•, see Section A. (4.). 6. Effluent Hardness samples shall coincide with sampling of metals. 7. Total Silver shall be monitored using "clean" sampling techniques and reported to the lower reporting level of the procedure. 8. See Section A. (6.) for Color Reopener and Monitoring Requirements. 9. The Permittee shall perform three Effluent Pollutant Scans during the term of this permit; see Section A. (5.). 10. The Permittee shall sample instream hardness, upstream of the facility's discharge. The sample shall be representative of the hardness in the receiving stream. b. There shall be no discharge of floating solids or visible foam in other than trace amounts. Page 6 of 6 ATTACHMENT B EMC SOC WQ S19-007 Ad I City of Albemarle — Long Creek WWTP Improvements Brief Proiect Description The Long Creek WWTP improvements will include implementation and/or construction of the following items: • Perform electrical upgrades to the electrical grid at the WWTP to ensure reliability of WWTP in accordance with 15A NCAC 2H .0124. • Conduct engineering study of hydraulic loading to individual waste treatment trains to operate aeration basin and secondary clarifier train independently of other treatment trains to accommodate fluctuating flows into WWTP. • Perform necessary construction, piping, and valving to operate each treatment train independently of each other. Page 1 of 1 NORTH CAROLINA 2022 303(D) LIST Rocky Yadkin -Pee Dee River Basin AU Name AU ID Description Big Bear Creek F_ 2278 From source to Long Creek PARAMETER IR CATEGORY (Fish Community (Nar, AL, FW) 5 AU Number Classification 13-17-31-5 F AU_LengthArea AU —Units 19.9 FW Miles CRITERIA STATUS REASON FOR RATING 303D YEAR Exceeding Criteria Fair, Poor or Severe Bioclassification 2014 Long Creek 13312 From Little Long Creek to Rocky River 13-17-31b 2.2 FW Miles PARAMETER IR CATEGORY CRITERIA STATUS REASON FOR RATING 303D YEAR Copper (7 µg/I, AL, FW) 5 Exceeding Criteria Legacy Category 5 Total Metals 2008 Assessment Richardson Creek (Lake Lee) 13-17-36-(3.5 WS-IV;CA 46.1 FW Acres 13895 Richardson Creek Arm PARAMETER IR CATEGORY CRITERIA STATUS REASON FOR RATING 303D YEAR Chlorophyll a (40 µg/I, AL, NC) 5 Exceeding Criteria 2016 Richardson Creek (Lake Lee) 13-17-36-(3.5 LWS-IV;CA 63.5 FW Acres 831 96 ILittle Richardson Creek Arm PARAMETER IR CATEGORY CRITERIA STATUS REASON FOR RATING 303D YEAR Chlorophyll a (40 µg/I, AL, NC) 5 Exceeding Criteria 2016 Richardson Creek (Lake Lee) 13-17-36-(3.5 WS-I CV A 19.2 FW Acres 13897 Reservoir downstream of arms and upstream of dam PARAMETER IR CATEGORY CRITERIA STATUS REASON FOR RATING 303D YEAR Water Temperature (329C, AL, LP&CP) 5 Exceeding Criteria 2018 Dissolved Oxygen (4 mg/I, AL, FW) 5 Exceeding Criteria 2018 Chlorophyll a (40 µg/l, AL, NC) 5 Exceeding Criteria 2016 Richardson Creek 13-17-36-(5)a [ 8.2 FW Miles 2296 From Monroe Water Supply Dam (Lake Lee) to Mill Creek 13-17-36-10 PARAMETER IR CATEGORY CRITERIA STATUS REASON FOR RATING 303D YEAR Benthos (Nar, AL, FW) 5 Exceeding Criteria Fair, Poor or Severe Bioclassification 1998 Richardson Creek ____1 13-17-36-(5)a 4.7 FW Miles 12948 From Watson Creek to Salem Creek PARAMETER IR CATEGORY CRITERIA STATUS = REASON FOR RATING 303D YEAR Copper Dissolved Chronic (Calcuated, AL, FW) 5 (Exceeding Criteria [Exceeding Criteria with Statistical 2018 Confidence 6/7/2022 NC 2022 303d List- Approved by EPA 4/30/2022 Page 186 of 192 NORTH CAROLINA 2022 INTEGRATED REPORT Rocky Yadkin -Pee Dee River Basin AU Name AU Number AU ID Description South Prong West Branch Rocky River 13-17-3-1 C 2268, From source to West Branch Rocky River 2022 Water Quality Assessments PARAMETER Benthos (Nar, AL, FW) Little Long Creek 13-17-31-1 C 2269 From source to Long Creek 2022 Water Quality Assessments PARAMETER Benthos (Nar, AL, FW) Big Bear Creek 13-17-31-5 C 2278 From source to Long Creek 2022 Water Quality Assessments PARAMETER Benthos (Nar, AL, FW) Fish Community (Nar, AL, FW) Stony Run 13-17-31-5-5 C 2284 From source to Big Bear Creek 2022 Water Quality Assessments PARAMETER _ Fish Community (Nar, AL, FW) Long Creek 13-17-31a C 13192 From source to Little Long Creek 2022 Water Quality Assessments PARAMETER Benthos (Nar, AL, FW) Fish Community (Nar, AL, FW) Classification AU LengthArea AU Units 4.6 FW Miles IR CATEGORY CRITERIA STATUS 3a Data Inconclusive 8.5 FW Miles IR CATEGORY CRITERIA STATUS 1 Meeting Criteria 19.9 FW Miles IR CATEGORY CRITERIA STATUS 1 Meeting Criteria 5 Exceeding Criteria 11.9 FW Miles IR CATEGORY CRITERIA STATUS 1 iMeeting Criteria 24.5 FW Miles IR CATEGORY CRITERIA STATUS 1 Meeting Criteria 1 LMeeting Criteria 6/7/2022 NC 2022 INTEGRATED REPORT -Category 5 Approved by EPA 4/30/2022 Page 1310 of 1346 NORTH CAROLINA 2022 INTEGRATED REPORT Rocky Yadkin -Pee Dee River Basin AU Name AU ID Description Long Creek 13312 From Little Long Creek to Rocky River 2022 Water Quality Assessments PARAMETER Water Temperature (329C, AL, LP&CP) Dissolved Oxygen (4 mg/I, AL, FW) pH (9.0, AL, FW) pH (6 su, AL, FW) Turbidity (50 NTU, AL, FW miles) Chloride (230 mg/I, AL, FW) Flouride (1.8 mg/l, AL, FW) Copper (7 µg/I, AL, FW) Fecal Coliform (GM 200/400, REC, FW) Richardson Creek (Lake Lee) 13895 Richardson Creek Arm 2022 Water Quality Assessments PARAMETER Chlorophyll a (40 µg/I, AL, NC) pH (6 su, AL, FW) Water Temperature (329C, AL, LP&CP) Dissolved Oxygen (4 mg/I, AL, FW) pH (9.0, AL, FW) AU Number Classification AU LengthArea AU Units 13-17-31b C 2.2 FW Miles IR CATEGORY CRITERIA STATUS 1 Meeting Criteria 1 Meeting Criteria 1 Meeting Criteria 1 Meeting Criteria 1 Meeting Criteria 3a Data Inconclusive 3a Data Inconclusive CExceeding Criteria Meeting Criteria 43-17-36-(3.5 WS-IV;CA I CATEGORY 5 1 3a 3a 3a 46.1 FW Acres CRITERIA STATUS Exceeding Criteria Meeting Criteria Data Inconclusive Data Inconclusive Data Inconclusive 6/7/2022 NC 2022 INTEGRATED REPORT -Category 5 Approved by EPA 4/30/2022 Page 1311 of 1346 u z O " O O u u u O O O to to to z U O O N z U O �I V O N Z Oo i a a 0 O d O d O v n O v 0 a 0 a 0 (u 0 u p p p p O a) Q a a v 6 a) Q LL z C LL C LL C LL C LL cl a x x x x a d i a �p Ln d t6 Ul d d M �p Ln a a a a v O rl N V1 M O U a -I U ci U ci U U cy M a z O p d O = a c S cr N v r O a y M N f z C Z O C N C •--� CO LL m LL CO LL Co LL m LL d d d d d u a `^ 00 N O 0 O w u O m O O O O c-I Ln cfO a i--I 0 d c-I O 2i in O 1 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Z Q. z Q oo A C C C C 7 7 7 7 O U O U O U O U c c C a d d d o O pl jc C a d d x x N j G a a a a a jc C a d d d a e 0 A N M O O O C 0 C Ol \-i W W V E to L ci w L ci w L Noo L o0 U O U O U tV Z Z Z Z a) ti Ln oo O O O O N ti N N M C C C 2 C bf7 1 h0 1 D_h0 1 p ~h0 1 N N F N O N COcL [O [O A o] Y C C N O O v t U d W 01 O N 4% 00 Ot O N 4% CO m O N CO m O N J J 4J a) LL a u LL a u LL a L LL a Y � N E � f0 E -aE E � O L _ N T _ N 1 (O N L v a U Q U Q U a U ROY COOPER Governor ELIZABETH S. BISER Secretary RICHARD E. ROGERS, JR. Director Michael Ferris City of Albemarle PO Box 190 Albemarle, NC 28002-0190 NORTH CAROLINA Environmental Quality September 2, 2022 SUBJECT: Compliance Inspection Report Long Creek WWTP NPDES WW Permit No. NCO024244 Stanly County Mr. Ferris: The North Carolina Division of Water Resources conducted a Compliance Evaluation Inspection (CEI) of the Long Creek WWTP on August 16, 2022. This inspection was conducted to verify that the facility is operating in compliance with the conditions and limitations specified in NPDES WW Permit No. NCO024244 and SOC S19-007. The findings and comments noted during this inspection are provided in the enclosed copy of the inspection report entitled "Compliance Inspection Report". If you should have any questions regarding this inspection, please do not hesitate to contact Roberto Scheller with the Water Quality Regional Operations Section in the Mooresville Regional Office at 704-663-1699 or via email at roberto.scheller@ncdenr.gov. Sincerely, Docu Signed by: F161FB69A2D84A3... Andrew Pitner, Acting Regional Supervisor Water Quality Regional Operations Section Mooresville Regional Office Division of Water Resources, NCDEQ ATTACHMENTS Cc: Laserfiche Bryan Hinson (Water/Wastewater Resource Manager): blhinson@albemarlenc.gov Brandon Plyler (ORC) email: bplyler@albemarlenc.gov North Carolina Department of Environmental Quality I Division of Water Resources 512 North Salisbury Street 11611 Mail Service Center I Raleigh, North Carolina 27699-1611 NORTH CARCLINA o—�m� 919.707.9000 United States Environmental 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 1 2 15 I 3 I NCO024244 111 121 22/08/16 I17 18 I r I 19 I G I 201 I 211IIIII IIIIIIIIIII IIIIIII I IIIIII IIIIII�1IIII 166 Inspection Work Days Facility Self -Monitoring Evaluation Rating B1 QA ---------------------- Reserved ------------------- 67 70 LI, J I 71 I tyI 72 I Lni I 73 �I74 79 I I I I I I 180 J Section B: Facility Data Name and Location of Facility Inspected (For Industrial Users discharging to POTW, also include Entry Time/Date Permit Effective Date POTW name and NPDES Dermit Number) 09:41AM 22/08/16 18/12/01 Long Creek WWTP 1040 Coble Ave Extension Exit Time/Date Permit Expiration Date Albemarle NC 28002 12:26PM 22/08/16 22/02/28 Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) Other Facility Data Name, Address of Responsible Official/Title/Phone and Fax Number Contacted Michael J Ferris,PO Box 190 Albemarle NC 280020190/City Manager/704-984-9410/7049849406 No Section C: Areas Evaluated During Inspection (Check only those areas evaluated) Permit 0 Flow Measurement Operations & Maintenar Records/Reports Self -Monitoring Progran 0 Sludge Handling Dispo: Facility Site Review Compliance Schedules Effluent/Receiving Wate 0 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 DocuSigned by: 8/31/2022 `��DSte^&' DWR/MRO WQ/707-235-2204/ Roberto SchellerEglCM007838943E... Signature of Man ents@n@ftviewer Agency/Office/Phone and Fax Numbers Date Andrew Pitn r A:d4W H P44tWR/MRO WQ/704-663-1699 Ext.2180/ 9. 2.22 F161FB69A2D84A3.. EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete. Page# NPDES yr/mo/day Inspection Type NCO024244 I11 12I 22/08/16 117 18 ICI (Cont.) Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) The current NPDES Permit #NC0024244 was issued on December 1, 2018 and expired on February 28, 2022. A Permit Renewal application was received by the Division dated September 7, 2021. Permit is for continue operation and maintainace of a 12.0 MGD wastewater treatment system. Discharge is via Outfall #001 into Long Creek which is classified as C waters in the Yadkin -Pee Dee River Basin. The subject facility is under Special Order by Consent (EMC SOC WQ S19-007) with modified permit parameters for BOD (Summer/Winter), Ammonia Nitrogen (Summer/Winter), and TSS. Please note that in accordance with SOC WQ S19-007, Item 2. (d), No later than fifteen (15) calendar days after any date identified for accomplishment of any activity listed in 2(a), Table of Scheduled Activity, the City shall submit to the Water Quality Regional Operations Section, Regional Supervisor, written notice of compliance or noncompliance therewith. Please also note that quarterly progress reports detailing the work and activities undertaken and completed on the upgrades to the collection system and WWTP are to be submitted. Flows for the calendar year 2021 were caculated with a yearly average monthly flow of 4.89 MGD or 40.79% of the 12 MGD permitted flow. Flows for calendar year 2020 were caculated with a yearly monthly average flow of 6.247 MGD or 52.05% of the 12 MGD permitted flow. The noted reduction of percent flow may be attritubed to reduced yearly average rainfall during 2021. The average rainfall for the Albemarle area is reported at 48.3 to 47 inches per year. Total rainfall for 2021 was reported at 35.67 inches. Enclosed with this report are copies of 12-month calculated averages for permit parameters. Also attached are graphs of the 12-month averages for BOD (Inf), BOD (Eff), TSS, NH3 as N, Flow, and Fecal Coliform. It was noted that effluent BOD and NH3 as N reflect affect of high flows. The influent BOD graph shows reverse affect of high Flows indicating a reduction in influent BOD by dilution. Compliance history for the 12-month period, July 2021 through June 2022, was reviewed with the following reported violations: 08-2021 SP-2021-00 Exceeded Monthly Average - TSS 09-2021 SP-2021-0011 Exceeded Weekly/Monthly Average - TSS 10-2021 SP-2021-0015 Exceeded Weekly/Monthly Average - TSS 11-2021 SP-2022-0001 Exceeded Weekly/Monthly Average - TSS 12-2021 SP-2022-0004 Exceeded Weekly Average - TSS 01-2022 SP-2022-0005 Exceeded Monthly Average - TSS At time of inspection records and required information appeared to be well kept and readily available for review. Page# Permit: NCO024244 Owner -Facility: Long Creek WWTP Inspection Date: 08/16/2022 Inspection 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: The current permmit became effective on December 1, 2018 and expired on February 28, 2022. Record Keeping Yes No NA NE Are records kept and maintained as required by the permit? ■ ❑ ❑ ❑ Is all required information readily available, complete and current? ■ ❑ ❑ ❑ Are all records maintained for 3 years (lab. reg. required 5 years)? ■ ❑ ❑ ❑ Are analytical results consistent with data reported on DMRs? ■ ❑ ❑ ❑ Is the chain -of -custody complete? ■ ❑ ❑ ❑ Dates, times and location of sampling ■ Name of individual performing the sampling ■ Results of analysis and calibration ■ Dates of analysis ■ Name of person performing analyses ■ Transported COCs ■ Are DMRs complete: do they include all permit parameters? ■ ❑ ❑ ❑ Has the facility submitted its annual compliance report to users and DWQ? ■ ❑ ❑ ❑ (If the facility is = or > 5 MGD permitted flow) Do they operate 24/7 with a certified ■ ❑ ❑ ❑ operator on each shift? Is the ORC visitation log available and current? ■ ❑ ❑ ❑ Is the ORC certified at grade equal to or higher than the facility classification? ❑ ❑ ❑ ❑ Is the backup operator certified at one grade less or greater than the facility ■ ❑ ❑ ❑ classification? Is a copy of the current NPDES permit available on site? ■ ❑ ❑ ❑ Facility has copy of previous year's Annual Report on file for review? ❑ ❑ ■ ❑ Comment: Annual Report on line. Operations & Maintenance Yes No NA NE Page# 3 Permit: NCO024244 Inspection Date: 08/16/2022 Owner -Facility: Long Creek WWTP Inspection Type: Compliance Evaluation Operations & Maintenance Yes No NA NE Is the plant generally clean with acceptable housekeeping? 0 ❑ ❑ ❑ Does the facility analyze process control parameters, for ex: MLSS, MCRT, Settleable 0 ❑ ❑ ❑ Solids, pH, DO, Sludge Judge, and other that are applicable? Comment: Compliance Schedules Yes No NA NE Is there a compliance schedule for this facility? 0 ❑ ❑ ❑ Is the facility compliant with the permit and conditions for the review period? ❑ ❑ 0 ❑ Comment: Facility under SOC S19-007. 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? 0 ❑ ❑ ❑ # Is proper temperature set for sample storage (kept at less than or equal to 6.0 0 ❑ ❑ ❑ degrees Celsius)? Incubator (Fecal Coliform) set to 44.5 degrees Celsius+/- 0.2 degrees? ❑ ❑ 0 ❑ Incubator (BOD) set to 20.0 degrees Celsius +/- 1.0 degrees? ❑ ❑ M ❑ Comment: Contract lab. Environment 1 Inc. and Field Lab Certification #5648. Bar Screens Yes No NA NE Type of bar screen a.Manual ❑ b.Mechanical Are the bars adequately screening debris? 0 ❑ ❑ ❑ Is the screen free of excessive debris? ■ ❑ ❑ ❑ Is disposal of screening in compliance? 0 ❑ ❑ ❑ Is the unit in good condition? 0 ❑ ❑ ❑ Comment: Grit Removal Yes No NA NE Type of grit removal a.Manual ❑ b.Mechanical Page# 4 Permit: NCO024244 Owner -Facility: Long Creek WWTP Inspection Date: 08/16/2022 Inspection Type: Compliance Evaluation Grit Removal Yes No NA NE Is the grit free of excessive organic matter? 0 ❑ ❑ ❑ Is the grit free of excessive odor? 0 ❑ ❑ ❑ # Is disposal of grit in compliance? 0 ❑ ❑ ❑ Comment: Flow Measurement - Influent Yes No NA NE # Is flow meter used for reporting? 0 ❑ ❑ ❑ Is flow meter calibrated annually? 0 ❑ ❑ ❑ Is the flow meter operational? 0 ❑ ❑ ❑ (If units are separated) Does the chart recorder match the flow meter? 0 ❑ ❑ ❑ Comment: Influent Sampling Yes No NA NE # Is composite sampling flow proportional? 0 ❑ ❑ ❑ Is sample collected above side streams? ■ ❑ ❑ ❑ Is proper volume collected? 0 ❑ ❑ ❑ Is the tubing clean? 0 ❑ ❑ ❑ # Is proper temperature set for sample storage (kept at less than or equal to 6.0 ■ ❑ ❑ ❑ degrees Celsius)? Is sampling performed according to the permit? M ❑ ❑ ❑ Comment: At time of inspection influent sampler was recorded at 2 degrees C. Pump Station - Influent Yes No NA NE Is the pump wet well free of bypass lines or structures? ■ ❑ ❑ ❑ Is the wet well free of excessive grease? 0 ❑ ❑ ❑ Are all pumps present? 0 ❑ ❑ ❑ Are all pumps operable? 0 ❑ ❑ ❑ Are float controls operable? ❑ ❑ ❑ ■ Is SCADA telemetry available and operational? ❑ ❑ 0 ❑ Is audible and visual alarm available and operational? ❑ ❑ ❑ Comment: Influent pump station consist of 4 screw lift pumps. Standby Power Yes No NA NE Page# 5 Permit: NCO024244 Owner - Facility: Long Creek WWTP Inspection Date: 08/16/2022 Inspection Type: Compliance Evaluation Standby Power Yes No NA NE Is automatically activated standby power available? 0 ❑ ❑ ❑ Is the generator tested by interrupting primary power source? 0 ❑ ❑ ❑ Is the generator tested under load? 0 ❑ ❑ ❑ Was generator tested & operational during the inspection? ❑ ❑ ❑ Do the generator(s) have adequate capacity to operate the entire wastewater site? 0 ❑ ❑ ❑ Is there an emergency agreement with a fuel vendor for extended run on back-up 0 ❑ ❑ ❑ power? Is the generator fuel level monitored? 0 ❑ ❑ ❑ Comment: Pump Station - Effluent Yes No NA NE Is the pump wet well free of bypass lines or structures? 0 ❑ ❑ ❑ Are all pumps present? ■ ❑ ❑ ❑ Are all pumps operable? 0 ❑ ❑ ❑ Are float controls operable? 0 ❑ ❑ ❑ Is SCADA telemetry available and operational? ❑ ❑ 0 ❑ Is audible and visual alarm available and operational? ❑ ❑ ❑ ■ Comment: Second lift station consist of 4 screw lift pumps located at secondary treatment. Aeration Basins Yes No NA NE Mode of operation Ext. Air Type of aeration system Surface Is the basin free of dead spots? 0 ❑ ❑ ❑ Are surface aerators and mixers operational? 0 ❑ ❑ ❑ Are the diffusers operational? ❑ ❑ 0 ❑ Is the foam the proper color for the treatment process? 0 ❑ ❑ ❑ Does the foam cover less than 25% of the basin's surface? 0 ❑ ❑ ❑ Is the DO level acceptable? ❑ ❑ ❑ Is the DO level acceptable?(1.0 to 3.0 mg/1) ❑ ❑ ❑ Comment: Secondary Clarifier Yes No NA NE Is the clarifier free of black and odorous wastewater? 0 ❑ ❑ ❑ Page# 6 Permit: NC0024244 Inspection Date: 08/16/2022 Owner -Facility: Long Creek WWTP Inspection Type: Compliance Evaluation Secondary Clarifier 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'/4 of the sidewall depth) Comment: Pumps-RAS-WAS Are pumps in place? Are pumps operational? Are there adequate spare parts and supplies on site? Comment: Filtration (High Rate Tertiary) 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: Effluent trubid. Disinfection -Gas Are cylinders secured adequately? Are cylinders protected from direct sunlight? Is there adequate reserve supply of disinfectant? Is the level of chlorine residual acceptable? Yes No NA NE ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ❑ ❑ ❑ Yes No NA NE ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ Yes No NA NE Cross flow ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ❑ ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ Yes No NA NE ■ ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ Page# 7 Permit: NCO024244 Inspection Date: 08/16/2022 Disinfection -Gas Owner -Facility: Long Creek WWTP Inspection Type: Compliance Evaluation Is the contact chamber free of growth, or sludge buildup? Is there chlorine residual prior to de -chlorination? Does the Stationary Source have more than 2500 Ibs of Chlorine (CAS No. 7782-50-5)? If yes, then is there a Risk Management Plan on site? If yes, then what is the EPA twelve digit ID Number? (1000- - ) If yes, then when was the RMP last updated? Comment: De -chlorination Type of system ? 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? Are the tablets the proper size and type? Comment: Sodium Bisulfite used for dechlorination. Are tablet de -chlorinators operational? Number of tubes in use? Comment: Flow Measurement - Effluent # Is flow meter used for reporting? Is flow meter calibrated annually? Is the flow meter operational? (If units are separated) Does the chart recorder match the flow meter? Comment: Effluent Sampling Is composite sampling flow proportional? Is sample collected below all treatment units? Is proper volume collected? Is the tubing clean? Yes No NA NE ❑ ❑ ❑ ■ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ 1000-0012-3092 Yes No NA NE Liquid ❑ ❑ ❑ ■ ❑ ❑ N ❑ ■ ❑ ❑ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ Yes No NA NE ■ ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ ❑ ❑ ❑ Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ ■ ❑ ❑ ❑ ❑ ❑ ❑ ❑ Page# 8 Permit: NCO024244 Inspection Date: 08/16/2022 Owner -Facility: Long Creek WWTP Inspection Type: Compliance Evaluation Effluent Sampling # Is proper temperature set for sample storage (kept at less than or equal to 6.0 degrees Celsius)? Is the facility sampling performed as required by the permit (frequency, sampling type representative)? Comment: At time of inspection effluent sampler was recorded (a) 5 degrees C. Solids Handling Equipment Is the equipment operational? Is the chemical feed equipment operational? Is storage adequate? Is the site free of high level of solids in filtrate from filter presses or vacuum filters? Is the site free of sludge buildup on belts and/or rollers of filter press? Is the site free of excessive moisture in belt filter press sludge cake? The facility has an approved sludge management plan? Comment: Yes No NA NE ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ Yes No NA NE ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ Page# 9 NH3/TRC WLA Calculations Albemarle - Long Creek WWTP PermitNo. NC002424 Prepared By: Gary Perlmutter Enter Design Flow (MGD): 12 Enter s7Q10 (cfs): 1.6 Enter w7Q10 (cfs): 9.5 Total Residual Chlorine (TRC) Daily Maximum Limit (ug/1) Ammonia (Summer) Monthly Average Limit (mg NH3-N/1) s7Q10 (CFS) 1.6 s7Q10 (CFS) 1.6 DESIGN FLOW (MGD) 12 DESIGN FLOW (MGD) 12 DESIGN FLOW (CFS) 18.6 DESIGN FLOW (CFS) 18.6 STREAM STD (UG/L) 17.0 STREAM STD (MG/L) 1.0 Upstream Bkgd (ug/1) 0 Upstream Bkgd (mg/1) 0.22 IWC (%) 92.08 IWC (%) 92.08 Allowable Conc. (ug/1) 18 Allowable Conc. (mg/1) 1.1 Ammonia (Winter) Monthly Average Limit (mg NH3-N/1) Fecal Coliform w7Q10 (CFS) 9.5 Monthly Average Limit: 200/900ml DESIGN FLOW (MGD) 12 (If DF >331; Monitor) DESIGN FLOW (CFS) 18.6 (If DF<331; Limit) STREAM STD (MG/L) 1.8 Dilution Factor (DF) 1.09 Upstream Bkgd (mg/1) 0.22 IWC (%) 66.19 Allowable Conc. (mg/1) 2.6 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); capped at 35 mg/I 3. Monthly Avg limit x 5 = Daily Max limit (Non-Munis); capped at 35 mg/I Fecal Coliform 1. Monthly Avg limit x 2 = 400/100 ml = Weekly Avg limit (Municipals) = Daily Max limit (Non -Muni) NH3/TRC WLA Calculations Albemarle - Long Creek WWTP PermitNo. NC002424 Prepared By: Gary Perlmutter Enter Design Flow (MGD): 16 Enter s7Q10 (cfs): 1.6 Enter w7Q10 (cfs): 9.5 Total Residual Chlorine (TRC) Daily Maximum Limit (ug/1) Ammonia (Summer) Monthly Average Limit (mg NH3-N/1) s7Q10 (CFS) 1.6 s7Q10 (CFS) 1.6 DESIGN FLOW (MGD) 16 DESIGN FLOW (MGD) 16 DESIGN FLOW (CFS) 24.8 DESIGN FLOW (CFS) 24.8 STREAM STD (UG/L) 17.0 STREAM STD (MG/L) 1.0 Upstream Bkgd (ug/1) 0 Upstream Bkgd (mg/1) 0.22 IWC (%) 93.94 IWC (%) 93.94 Allowable Conc. (ug/1) 18 Allowable Conc. (mg/1) 1.1 Ammonia (Winter) Monthly Average Limit (mg NH3-N/1) Fecal Coliform w7Q10 (CFS) 9.5 Monthly Average Limit: 200/100ml DESIGN FLOW (MGD) 16 (If DF >331; Monitor) DESIGN FLOW (CFS) 24.8 (If DF<331; Limit) STREAM STD (MG/L) 1.8 Dilution Factor (DF) 1.06 Upstream Bkgd (mg/1) 0.22 IWC (%) 72.30 Allowable Conc. (mg/1) 2.4 Total Residual Chlorine 1. Cap Daily Max limit at 28 ug/l to protect for acute toxicity Ammonia (as NH3-N) 1. If Allowable Conc > 35 mg/l, Monitor Only 2. Monthly Avg limit x 3 = Weekly Avg limit (Municipals); capped at 35 mg/I 3. Monthly Avg limit x 5 = Daily Max limit (Non-Munis); capped at 35 mg/I Fecal Coliform 1. Monthly Avg limit x 2 = 400/100 ml = Weekly Avg limit (Municipals) = Daily Max limit (Non -Muni) Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators MAXIMUM DATA POINTS = 58 REQUIRED DATA ENTRY Table 1. Project Information Facility Name WWTP/WTP Class NPDES Permit Outfall Flow, Qw (MGD) Receiving Stream HUC Number Stream Class ❑ Apply WS Hardness WQC 7Q10s (cfs) 7Q10w (cfs) 30Q2 (cfs) QA (cfs) 1Q10s (cfs) _Effluent Hardness Upstream Hardness _Combined Hardness Chronic Combined__Hardness ZZt 7 _ Data Source(s) I —I CHECK TO APPLY MODEL ❑ CHECK IF HQW OR ORW WQS Alebemarle - Long Creek WWTP Grade IV NCO024244 001 12.000 Long Creek 03040105 C 1.60 9.50 64.00 1.34 48.32 mg/L (Avg) 73.34 mg/L (Avg) 50_3mg/L --- 50 mg/L-------- Par01 Par02 Par03 Par04 Par05 Par06111111 Par07 Par08 Par09 Par10 Par11 Par12 Par13 Par14 Par15 Par16 Par17 Parts Par19 Par20 Par21 Par22 Par23 Par24 Table 2. Parameters of Concern Name w4s Type Chronic ModIer 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 1.0007 FW 5.9325 ug/L Chlorides Aquatic Life NC 230 FW 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 208.7367 FW 1596.8345 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 14.3233 FW 20.1230 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 6.4289 FW 163.8847 ug/L Mercury Aquatic Life NC 12 FW 0.5 ng/L Molybdenum Human Health NC 2000 HH ug/L Nickel Aquatic Life NC 67.2682 1 FW 602.5819 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 0.9766 ug/L Zinc Aquatic Life NC 229.1856 FW 226.1755 ug/L Bis(2-ethylhexyl) phthalate Human Health C 0.37 HH pg/L 24244 Freshwater RPA 12.0 MGD, input 1 /27/2023 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 REASONABLE POTENTIAL ANALYSIS H2 Use "PASTE SPECIAL Use "PASTE SPECIAL Effluent Hardness Values" then "COPY• Upstream Hardness Values" then "COPY" . Maximum data . Maximum data points = 58 points = 58 Date Data BDL=1/2DL 12/5/2018 44.7 44.7 1/10/2019 49.9 49.9 2/7/2019 22.6 22.6 3/12/2019 36.1 36.1 4/4/2019 41.6 41.6 5/7/2019 44.2 44.2 6/6/2019 40 40 7/16/2019 39 39 8/6/2019 35 35 9/10/2019 39 39 12/3/2019 45 45 3/10/2020 56 56 6/2/2020 56 56 9/9/2020 63 63 12/3/2020 46 46 3/4/2021 50 50 6/3/2021 77 77 9/14/2021 64 64 12/7/2021 50 50 3/3/2022 59 59 6/2/2022 58 58 9/13/2022 47 47 Results Std Dev. 11.8369 Mean 48.3227 C.V. 0.2450 n 22 10th Per value 36.39 mg/L Average Value 48.32 mg/L Max. Value 77.00 mg/L Date Data BDL=1/2DL Results 1 12/4/2018 54.8 54.8 Std Dev. 27.9813 2 3/7/2019 30 30 Mean 73.3412 3 6/4/2019 82 82 C.V. 0.3815 4 7/1/2019 114 114 n 17 5 9/11/2019 101 101 10th Per value 41.60 mg/L 6 12/4/2019 137 137 Average Value 73.34 mg/L 7 3/2/2020 56 56 Max. Value 137.00 mg/L 8 6/1/2020 38 38 9 9/8/2020 61 61 10 12/2/2020 62 62 11 3/3/2021 44 44 12 6/1/2021 67 67 13 9/13/2021 76 76 14 12/2/2021 94 94 15 3/2/2022 67 67 16 6/1/2022 96 96 17 9/12/2022 67 67 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 24244 Freshwater RPA 12.0 MGD, data -2- 1 /27/2023 REASONABLE POTENTIAL ANALYSIS Par01 & Par02 Arsenic Date Data BDL=1/2DL Results 1 8/7/2018 < 2.5 1.25 Std Dev. 2 9/11/2018 < 2.5 1.25 Mean 3 10/2/2018 < 2.5 1.25 C.V. 4 11/29/2018 < 2.5 1.25 n 5 12/5/2018 < 2.5 1.25 6 1/10/2019 < 2.5 1.25 Mult Factor = 7 2/7/2019 2.7 2.7 Max. Value 8 3/12/2019 < 2.5 1.25 Max. Fred Cw 9 6/6/2019 < 2.5 1.25 10 9/10/2019 < 3 1.5 11 12/3/2019 < 3 1.5 12 3/10/2020 < 2 1 13 6/2/2020 < 2 1 14 9/9/2020 < 2 1 15 12/3/2020 < 3 1.5 16 3/4/2021 < 2 1 17 6/3/2021 < 2 1 18 9/14/2021 < 2 1 19 12/7/2021 < 2 1 20 3/3/2022 < 2 1 21 6/2/2022 < 2 1 22 9/13/2022 < 2 1 23 24 25 26 27 28 29 3 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 Par03 Values" then "COPY" . Maximum data points = 58 1.2364 0.3011 22 1.16 2.7 ug/L 3.1 ug/L Date Data 1 10/15/2019 < 2 9/15/2020 < 3 6/2/2021 < 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 Use "PASTE SPECIAL Beryllium Values" then "COPY" . Maximum data points = 58 BDL=1/2DL Results 1 0.5 Std Dev. 0.0000 1 0.5 Mean 0.5000 1 0.5 C.V. (default) 0.6000 n 3 Mult Factor = 3.00 Max. Value 0.50 ug/L Max. Fred Cw 1.50 ug/L 24244 Freshwater RPA 12.0 MGD, data -3- 1 /27/2023 REASONABLE POTENTIAL ANALYSIS Par04 Cadmium Date Data BDL=1/2DL Results 1 8/7/2018 1.2 1.2 Std Dev. 2 9/11/2018 < 1 0.5 Mean 3 10/2/2018 < 1 0.5 C.V. 4 11 /29/2018 < 1 0.5 n 5 12/5/2018 < 1 0.5 6 1/10/2019 1.5 1.5 Mult Factor = 7 2/7/2019 < 1 0.5 Max. Value 8 3/12/2019 < 1 0.5 Max. Fred Cw 9 4/4/2019 < 1 0.5 10 5/7/2019 < 1 0.5 11 6/6/2019 < 1 0.5 12 8/6/2019 < 0.5 0.25 13 9/10/2019 < 0.5 0.25 14 11/5/2019 < 0.5 0.25 15 12/3/2019 < 0.5 0.25 16 1/9/2020 < 0.5 0.25 17 2/4/2020 < 0.5 0.25 18 3/10/2020 < 0.5 0.25 19 4/8/2020 < 0.5 0.25 20 5/5/2020 < 0.5 0.25 21 6/2/2020 < 0.5 0.25 22 7/7/2020 < 0.5 0.25 23 8/6/2020 < 0.5 0.25 24 9/9/2020 < 0.5 0.25 25 10/6/2020 < 0.5 0.25 26 11/5/2020 < 0.5 0.25 27 12/3/2020 < 0.5 0.25 28 1/7/2021 < 0.5 0.25 29 2/4/2021 < 0.5 0.25 30 3/4/2021 < 0.5 0.25 31 4/8/2021 < 0.5 0.25 32 5/5/2021 < 0.5 0.25 33 6/3/2021 < 0.5 0.25 34 7/7/2021 < 0.5 0.25 35 8/3/2021 < 0.5 0.25 36 9/14/2021 < 0.5 0.25 37 10/5/2021 < 0.5 0.25 38 11/3/2021 < 0.5 0.25 39 12/7/2021 < 0.5 0.25 40 1/6/2022 < 0.5 0.25 41 2/2/2022 < 0.5 0.25 42 3/3/2022 < 0.5 0.25 43 4/5/2022 < 0.5 0.25 44 5/4/2022 < 0.5 0.25 45 6/2/2022 < 0.5 0.25 46 7/7/2022 < 0.5 0.25 47 8/4/2022 < 0.5 0.25 48 9/13/2022 < 0.5 0.25 49 50 51 52 53 54 55 56 57 58 Use "PASTE SPECIAL Pdr05 Values" then "COPY" . Maximum data points = 58 0.3427 0.6883 48 1.06 1.500 ug/L 1.590 ug/L 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 Chlorides Date Data BDL=1/2DL Results Std Dev. Mean C.V. n Mult Factor = Max. Value Max. Fred Cw Use "PASTE SPECIAL - Values" then "COPY" . Maximum data points = 58 NO DATA NO DATA 0 N/A N/A mg/L N/A mg/L -4- 24244 Freshwater RPA 12.0 MGD, data 1 /27/2023 REASONABLE POTENTIAL ANALYSIS Par06 Chlorinated Phenolic Compounds Use "PASTE SPECIAL valves" imthenum •copydata . Max Par07 Total Phenolic Compounds points = 58 Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results 1 Std Dev. NO DATA 1 10/15/2019 < 5 2.5 Std Dev. 2 Mean NO DATA 2 9/15/2020 < 5 2.5 Mean 3 C.V. NO DATA 3 6/2/2021 < 20 10 C.V. (default) 4 n 0 4 n 5 5 6 Mult Factor = N/A 6 Mult Factor = 7 Max. Value N/A ug/L 7 Max. Value 8 Max. Fred Cw N/A ug/L 8 Max. Fred Cw 9 9 10 10 11 11 12 12 13 13 14 14 15 15 16 16 17 17 18 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 5.0000 0.6000 3 3.00 10.0 ug/L 30.0 ug/L 24244 Freshwater RPA 12.0 MGD, data -5- 1 /27/2023 REASONABLE POTENTIAL ANALYSIS Par08 Chromium III Date Data BDL=1/2DL Results 1 Std Dev. 2 Mean 3 C.V. 4 n 5 6 Mult Factor = 7 Max. Value 8 Max. Fred Cw 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 Use "PASTE SPECIAL Par09 Values" then "COPY" Chromium VI . Maximum data points = 58 NO DATA NO DATA 0 N/A N/A Ng/L N/A Ng/L Date Data BDL=1/2DL Results 1 12/5/2018 5.22 5.22 Std Dev. 2 1/10/2019 < 5 2.5 Mean 3 2/7/2019 < 5 2.5 C.V. 4 3/12/2019 < 5 2.5 n 5 4/4/2019 < 5 2.5 6 5/7/2019 < 5 2.5 Mult Factor = 7 6/6/2019 < 5 2.5 Max. Value 8 7/16/2019 < 0.1 0.05 Max. Fred Cw 9 8/6/2019 < 0.1 0.05 10 9/10/2019 < 0.1 0.05 11 10/9/2019 0.176 0.176 12 11 /5/2019 0.177 0.177 13 12/3/2019 0.301 0.301 14 1 /9/2020 < 0.1 0.05 15 2/4/2020 < 0.1 0.05 16 3/10/2020 < 0.1 0.05 17 4/8/2020 < 0.1 0.05 18 5/5/2020 0.292 0.292 19 6/2/2020 < 0.1 0.05 20 7/7/2020 < 0.1 0.05 21 8/6/2020 < 0.1 0.05 22 9/9/2020 0.162 0.162 23 10/6/2020 2 2 24 11 /5/2020 0.491 0.491 25 12/3/2020 < 0.1 0.05 26 1 /7/2021 0.241 0.241 27 2/4/2021 0.242 0.242 28 3/4/2021 < 0.1 0.05 0.896 0.896 F4/8/2021 5/5/20211.37 1.37 6/3/2021 < 0.1 0.05 32 7/7/2021 < 0.1 0.05 33 8/3/2021 < 0.1 0.05 34 9/14/2021 < 0.1 0.05 35 10/5/2021 < 0.1 0.05 36 11 /3/2021 < 0.1 0.05 37 12/7/2021 < 0.1 0.05 38 1 /6/2022 < 0.1 0.05 39 2/2/2022 < 0.1 0.05 40 3/3/2022 < 0.1 0.05 41 4/5/2022 < 0.1 0.05 42 5/4/2022 < 0.1 0.05 43 6/2/2022 < 0.1 0.05 44 7/7/2022 < 0.5 0.25 45 8/4/2022 < 0.1 0.05 46 9/13/2022 < 0.1 0.05 47 48 49 50 51 52 53 54 55 56 57 58 Use "PASTE SPECIAL Values" then "COPY' . Maximum data points = 58 0.6123 1.8043 46 1.15 5.2 Ng/L 6.0 Ng/L -6- 24244 Freshwater RPA 12.0 MGD, data 1 /27/2023 REASONABLE POTENTIAL ANALYSIS Par10 Chromium, Total Date Data BDL=1/2DL Results 1 8/7/2018 7 7 Std Dev. 2 9/11/2018 4.8 4.8 Mean 3 10/2/2018 3 3 C.V. (default) 4 11 /29/2018 7 7 n 5 6 Mult Factor = 7 Max. Value 8 Max. Pred Cw 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 Use "PASTE SPECIAL Pall Values" then "COPY" Copper . Maximum data points = 58 5.4500 0.6000 4 2.59 7.0 Ng/L 18.1 Ng/L Date Data BDL=1/2DL Results 1 8/7/2018 10 10 Std Dev. 2 9/11/2018 9 9 Mean 3 10/2/2018 8 8 C.V. 4 11/29/2018 25 25 n 5 12/5/2018 17 17 6 1/10/2019 14 14 Mult Factor = 7 2/7/2019 53 53 Max. Value 8 3/12/2019 13 13 Max. Pred Cw 9 4/4/2019 23 23 10 5/7/2019 8.5 8.5 11 6/6/2019 8.7 8.7 12 7/16/2019 9 9 13 8/6/2019 8 8 14 9/10/2019 8 8 15 10/9/2019 < 5 2.5 16 11/5/2019 16 16 17 12/3/2019 11 11 18 1 /9/2020 16 16 19 2/4/2020 12 12 20 3/10/2020 13 13 21 4/8/2020 10 10 22 5/5/2020 7 7 23 6/2/2020 9 9 24 7/7/2020 10 10 25 8/6/2020 33 33 26 9/9/2020 42 42 27 10/6/2020 19 19 28 11/5/2020 30 30 19 19 F12/3/2020 1/7/2021 15 15 2/4/2021 12 12 32 3/4/2021 10 10 33 4/8/2021 11 11 34 5/5/2021 16 16 35 6/3/2021 38 38 36 7/7/2021 31 31 37 8/3/2021 41 41 38 9/14/2021 34 34 39 10/5/2021 49 49 40 11/3/2021 45 45 41 12/7/2021 21 21 42 1/6/2022 27 27 43 2/2/2022 25 25 44 3/3/2022 18 18 45 4/5/2022 15 15 46 5/4/2022 23 23 47 6/2/2022 20 20 48 7/7/2022 35 35 49 8/4/2022 29 29 50 9/13/2022 8 8 51 52 53 54 55 56 57 58 Use "PASTE SPECIAL Values" then "COPY" . Maximum data points = 58 19.7340 0.6236 50 1.04 53.00 ug/L 55.12 ug/L -7- 24244 Freshwater RPA 12.0 MGD, data 1 /27/2023 REASONABLE POTENTIAL ANALYSIS Par12 Cyanide Date Data BDL=1/2DL Results 1 8/7/2018 < 5 5 Std Dev. 2 9/11/2018 < 5 5 Mean 3 10/2/2018 < 5 5 C.V. 4 11 /29/2018 6 5 n 5 12/5/2018 < 5 5 6 1/10/2019 6 5 Mult Factor = 7 2/7/2019 < 5 5 Max. Value 8 3/12/2019 27 27 Max. Fred Cw 9 6/6/2019 < 5 5 10 9/10/2019 < 5 5 11 12/3/2019 < 5 5 12 3/10/2020 < 5 5 13 6/2/2020 < 5 5 14 9/9/2020 < 5 5 15 12/3/2020 < 5 5 16 3/4/2021 < 5 5 17 6/3/2021 < 5 5 18 9/14/2021 < 5 5 19 12/7/2021 < 5 5 20 3/3/2022 < 5 5 21 6/2/2022 < 5 5 22 9/13/2022 < 5 5 23 24 25 26 27 28 29 3 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 Par13 Values" then "COPY" . Maximum data points = 58 6.00 0.7817 22 1.42 27.0 ug/L 38.3 ug/L 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 Use "PASTE SPECIAL Fluoride values" then "COPY" . Maximum data points = 58 Date Data BDL=1/2DL Results Std Dev. NO DATA Mean NO DATA C.V. NO DATA n 0 Mult Factor = N/A Max. Value N/A ug/L Max. Fred Cw N/A ug/L -8- 24244 Freshwater RPA 12.0 MGD, data 1 /27/2023 REASONABLE POTENTIAL ANALYSIS Par14 Lead Date BDL=1/2DL Results 1 8/7/2018 < 2.5 1.25 Std Dev. 2 9/11/2018 < 2.5 1.25 Mean 3 10/2/2018 < 2.5 1.25 C.V. 4 11/29/2018 < 2.5 1.25 n 5 1/10/2019 < 2.5 1.25 6 2/7/2019 < 2.5 1.25 Mult Factor = 7 3/12/2019 < 2.5 1.25 Max. Value 8 6/6/2019 < 2.5 1.25 Max. Fred Cw 9 9/10/2019 < 2 1 10 12/3/2019 < 2 1 11 3/10/2020 < 2 1 12 6/2/2020 < 2 1 13 9/9/2020 < 2 1 14 12/3/2020 < 2 1 15 3/4/2021 < 2 1 16 6/3/2021 < 2 1 17 9/14/2021 < 2 1 18 12/7/2021 < 2 1 19 3/3/2022 < 2 1 20 6/2/2022 < 2 1 21 9/13/2022 3 3 22 23 24 25 26 27 28 29 3 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 Par15 Values" then "COPY" . Maximum data points = 58 1.1905 0.3632 21 1.21 3.000 ug/L 3.630 ug/L 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 Use "PASTE SPECIAL Mercury Values" then "COPY" . Maximum data points = 58 Date Data BDL=1/2DL Results Std Dev. NO DATA Mean NO DATA C.V. NO DATA n 0 Mult Factor = N/A Max. Value N/A ng/L Max. Fred Cw N/A ng/L -9- 24244 Freshwater RPA 12.0 MGD, data 1 /27/2023 REASONABLE POTENTIAL ANALYSIS Par16 Molybdenum Date Data BDL=1/2DL Results 1 8/7/2018 < 5 2.5 Std Dev. 2 9/11/2018 < 5 2.5 Mean 3 10/2/2018 100 100 C.V. 4 11 /29/2018 < 10 5 n 5 12/5/2018 < 10 5 6 1/10/2019 < 10 5 Mult Factor = 7 2/7/2019 < 10 5 Max. Value 8 3/12/2019 < 10 5 Max. Fred Cw 9 6/6/2019 < 10 5 10 9/10/2019 < 5 2.5 11 12/3/2019 < 5 2.5 12 3/10/2020 < 5 2.5 13 6/2/2020 < 5 2.5 14 9/9/2020 < 5 2.5 15 12/3/2020 < 5 2.5 16 3/4/2021 < 5 2.5 17 6/3/2021 < 5 2.5 18 9/14/2021 < 5 2.5 19 12/7/2021 < 5 2.5 20 3/3/2022 < 5 2.5 21 6/2/2022 < 5 2.5 22 9/13/2022 < 5 2.5 23 24 25 26 27 28 29 3 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 Par17 & Pdr18 Values" then "COPY" . Maximum data points = 58 7.6136 2.7143 22 2.09 100.0 ug/L 209.0 ug/L Date Data 1 8/7/2018 2 9/11/2018 3 10/2/2018 < 4 11 /29/2018 5 1/10/2019 6 2/7/2019 7 3/12/2019 8 6/6/2019 < 9 9/10/2019 < 10 12/3/2019 < 11 3/10/2020 12 6/2/2020 < 13 9/9/2020 14 12/3/2020 < 15 3/4/2021 < 16 6/3/2021 17 9/14/2021 18 12/7/2021 19 3/3/2022 < 20 6/2/2022 21 9/13/2022 < 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 4 4 Std Dev. 4 4 Mean 2 1 C.V. 2.5 2.5 n 4.5 4.5 2 2 Mult Factor = 5.3 5.3 Max. Value 2 1 Max. Fred Cw 5 2.5 5 2.5 3 3 2 1 5 5 5 2.5 2 1 5 5 4 4 3 3 2 1 4 4 5 2.5 Use "PASTE SPECIAL Values" then "COPY" . Maximum data points = 58 2.9190 0.4944 21 1.28 5.3 Ng/L 6.8 pg/L -10- 24244 Freshwater RPA 12.0 MGD, data 1 /27/2023 REASONABLE POTENTIAL ANALYSIS Par19 Date Data 1 8/7/2018 < 2 9/11/2018 < 3 10/2/2018 < 4 11 /29/2018 < 5 1/10/2019 < 6 2/7/2019 < 7 3/12/2019 < 8 6/6/2019 < 9 9/10/2019 < 10 12/3/2019 < 11 3/10/2020 < 12 6/2/2020 < 13 9/9/2020 < 14 12/3/2020 < 15 3/4/2021 < 16 6/3/2021 < 17 9/14/2021 < 18 12/7/2021 < 19 3/3/2022 < 20 6/2/2022 < 21 9/13/2022 < 22 23 24 25 26 27 28 29 3 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 Selenium 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 = 10 5 Max. Value 5 2.5 Max. Fred Cw 3 1.5 3 1.5 3 1.5 3 1.5 3 1.5 3 1.5 3 1.5 3 1.5 3 1.5 3 1.5 3 1.5 3 1.5 3 1.5 Use "PASTE SPECIAL Par20 Values" then "COPY" . Maximum data points = 58 2.0000 0.4183 21 1.24 5.0 ug/L 6.2 ug/L Use "PASTE SPECIAL Silver Values" then "COPY" . Maximum data points = 58 Date Data BDL=1/2DL Results 1 8/7/2018 < 2.5 1.25 Std Dev. 0.6672 2 9/11/2018 < 2.5 1.25 Mean 0.9190 3 10/2/2018 < 5 2.5 C.V. 0.7259 4 11/29/2018 < 2.5 1.25 n 21 5 12/5/2018 0.8 0.8 6 3/12/2019 < 5 2.5 Mult Factor = 1.41 7 6/6/2019 < 2.5 1.25 Max. Value 2.500 ug/L 8 7/16/2019 < 1 0.5 Max. Fred Cw 3.525 ug/L 9 9/10/2019 < 1 0.5 10 12/3/2019 < 1 0.5 11 3/10/2020 < 1 0.5 12 6/2/2020 < 1 0.5 13 9/9/2020 < 1 0.5 14 12/3/2020 < 1 0.5 15 3/4/2021 < 1 0.5 16 6/3/2021 < 1 0.5 17 9/14/2021 < 1 0.5 18 12/7/2021 < 1 0.5 19 3/3/2022 < 1 0.5 20 6/2/2022 < 1 0.5 21 9/13/2022 2 2 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 24244 Freshwater RPA 12.0 MGD, data 1 /27/2023 REASONABLE POTENTIAL ANALYSIS Par21 Date 1 8/7/2018 2 9/11/2018 3 10/2/2018 4 11 /29/2018 5 1/10/2019 6 2/7/2019 7 3/12/2019 8 6/6/2019 9 9/10/2019 10 12/3/2019 11 3/10/2020 12 6/2/2020 13 9/9/2020 14 12/3/2020 15 3/4/2021 16 6/3/2021 17 9/14/2021 18 12/7/2021 19 3/3/2022 20 6/2/2022 21 9/13/2022 22 23 24 25 26 27 28 29 3 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 Par22 ZincValues" then "COPY" . Maximum data points = 58 Data BDL=1/2DL Results 27 27 Std Dev. 51.3851 27 27 Mean 59.6667 17 17 C.V. 0.8612 45 45 n 21 27 27 44 44 Mult Factor = 1.49 25 25 Max. Value 184.0 ug/L 20 20 Max. Fred Cw 274.2 ug/L 24 24 36 36 40 40 23 23 174 174 40 40 30 30 184 184 101 101 69 69 53 53 99 99 148 148 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 Use "PASTE SPECIAL Bis(2-ethylhexyl) phthalate Values" then "COPY" . Maximum data points = 58 Date Data BDL=1/2DL Results 12/5/2018 < 3.5 1.75 Std Dev. 1.3608 3/12/2019 < 10 5 Mean 1.5469 6/6/2019 < 10 5 C.V. 0.8797 9/10/2019 < 2 1 n 16 12/3/2019 < 2 1 3/10/2020 < 2 1 Mult Factor = 1.69 6/2/2020 < 2 1 Max. Value 5.000000 Ng/L 9/9/2020 < 2 1 Max. Fred Cw 8.450000 Ng/L 12/3/2020 < 2 1 3/4/2021 < 2 1 6/10/2021 < 2 1 9/14/2021 < 2 1 12/7/2021 < 2 1 3/3/2022 < 2 1 6/2/2022 < 2 1 9/13/2022 < 2 1 -12- 24244 Freshwater RPA 12.0 MGD, data 1 /27/2023 Alebemarle - Long Creek WWTP - NC0024244 Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators MAXIMUM Qw (MGD) = 12.0000 1Q10S (cfs) = 1.34 7Q10S (cfs) = 1.60 7Q10W (cfs) = 9.50 30Q2 (cfs) = NO 30Q2 DATA Avg. Stream Flow, QA (cfs) = 64.00 Receiving Stream: Long Creek HUC 03040105 DATA POINTS = 58 WWTP/WTP Class: Grade IV IWC% @ 1Q10S = 93.27983952 IWC% @ 7Q10S = 92.07920792 IWC% @ 7Q10W = 66.19217082 IWC% @ 30Q2 = N/A IW%C @ QA = 22.51815981 Stream Class: C Outfall 001 Qw = 12 MGD COMBINED HARDNESS (mg/L) Acute = 50 mg/L Chronic = 50.3 mg/L PARAMETER NC STANDARDS OR EPA CRITERIA Y) REASONABLE POTENTIAL RESULTS RECOMMENDED ACTION TYPE J a z Applied Chronic Acute n # Det. Max Pred Cw Allowable Cw Standard Acute (FW): 364.5 Arsenic C 150 FW(7Q10s) 340 ug L 22 1 3.1 Chronic (FW): 162.9 No RP, Predicted Max < 50% of Allowable Cw - No No value > Allowable___Cw Monitoring required Arsenic C 10 HH/WS(Qavg) ug/L Chronic (HH): 44.4 No value > Allowable Cw Acute: 69.68 Beryllium NC 6.5 FW(7Q10s) 65 ug L 3 0 1.50 Note: n 5 9 C.V. (default) Chronic: 7.06 No detects; no monitoring required Limited data set NO DETECTS Max MDL = 1 Acute: 6.360 Cadmium NC 1.0007 FW(7Q10s) 5.9325 ug L 48 2 1.590 Chronic: 1.087 RP shown - apply Monthly Monitoring with Limit 2 values > Allowable Cw Acute: NO WQS Chlorides NC 230 FW(7Q10s) mg/L 0 0 N/A Chronic:----- 249.8 Acute: NO WQS Chlorinated Phenolic Compounds NC 1 A(30Q2) ug/L 0 0 N/A Chronic:-----IWC?------------------------------ Acute: NO WQS Total Phenolic Compounds NC 300 A(30Q2) ug/L 3 0 30.0 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Note: n 5 9 C.V. (default) Chronic: IWC? No detects; no monitoring required Limited data set NO DETECTS Max MDL = 20 Acute: 1,711.9 Chromium III NC 208.7367 FW(7Q10s) 1596.8345 µg/L 0 0 N/A Chronic:----- 226.7 Acute: 17.2 Chromium VI NC 11 FW(7Q10s) 16 µg/L 46 12 6.0 Chronic: 11.9 No RP , Predicted Max z 50% of Allowable Cw - No value > Allowable Cw apply Quarterly Monitoring Tot Cr value(s) > 5 but < Cr VI Allowable Cw Chromium, Total NC µg'L 4 4 18.1 Max reported value = 7 No monitoring required as Reported Max. value is < Note: n 5 9 C.V. (default) Cr-VI allowable Cw. Limited data set 24244 Freshwater RPA 12.0 MGD, rpa Page 13 of 14 1/27/2023 Alebemarle - Long Creek WWTP - Outfall 001 NCO024244 Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators Qw = 12 MGD Acute: 21.57 Copper NC 14.3233 FW(7QlOs) 20.1230 ug/L 50 49 55.12 Chronic: 15.56 RP shown - apply Monthly Monitoring with Limit 26 values > Allowable Cw Acute: 23.6 Cyanide NC 5 FW(7QlOs) 22 10 ug/L 22 3 38.3 Chronic: 5.4 RP shown - apply Monthly Monitoring with Limit 1 values > Allowable Cw Acute: NO WQS Fluoride NC 1800 FW(7QlOs) ug/L 0 0 N/A Chronic: -----1,954.8-- ------------------------ Acute: 175.691 Lead NC 6.4289 FW(7QIOs) 163.8847 ug/L 21 1 3.630 Chronic: 6.982 No RP , Predicted Max >_ 50% of Allowable Cw - No value > Allowable Cw apply Quarterly Monitoring Acute: NO WQS Mercury NC 12 FW(7QlOs) 0.5 ng/L 0 0 N/A --- ------------------------- Chronic:----- 13.0 Acute: NO WQS Molybdenum NC 2000 HH(7QlOs) ug/L 22 1 209.0 Chronic: 2,172.0 No RP, Predicted Max < 50% of Allowable Cw - No No value > Allowable Cw Monitoring required Acute (FW): 646.0 Nickel NC 67.2682 FW(7QlOs) 602.5819 µg/L 21 12 6.8 Chronic (FW): 73.1 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): 27.2 No value > Allowable Cw Acute: 60.0 Selenium NC 5 FW(7QlOs) 56 ug/L 21 0 6.2 _ _ _ _ _ _ _ _ Chronic: 5.4 _ _ _ _ _ _ _ _ _ _ _ _ _ _ No detects; no monitoring required NO DETECTS Max MDL =10 Acute: 1.047 Silver NC 0.06 FW(7QlOs) 0.9766 ug/L 21 2 3.525 Chronic: 0.065 1 detection within past three years - apply quarterly 21 values > Allowable Cw monitoring. Acute: 242.5 Zinc NC 229.1856 FW(7QlOs) 226.1755 ug/L 21 21 274.2 Chronic: 248.9 RP shown - apply Monthly Monitoring with Limit No value > Allowable Cw Acute: NO WQS Bis(2-ethylhexyl) phthalate C 0.37 HH(Qavg) µg/L 16 0 8.45000 Chronic: 1.64312 All nondetects at < 2 ug/I for past 3 yrs - no NO DETECTS Max MDL = 10 monitoring required Acute: 0 0 N/A Chronic:--------------------------------- 24244 Freshwater RPA 12.0 MGD, rpa Page 14 of 14 1/27/2023 Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators MAXIMUM DATA POINTS = 58 REQUIRED DATA ENTRY Table 1. Project Information Facility Name WWTP/WTP Class NPDES Permit Outfall Flow, Qw (MGD) Receiving Stream HUC Number Stream Class ❑ Apply WS Hardness WQC 7Q10s (cfs) 7Q10w (cfs) 30Q2 (cfs) QA (cfs) 1Q10s (cfs) _Effluent Hardness Upstream Hardness _Combined Hardness Chronic Combined__Hardness ZZt 7 _ Data Source(s) n CHECK TO APPLY MODEL ❑ CHECK IF HQW OR ORW WQS Alebemarle - Long Creek WWTP Grade IV NCO024244 001 16.000 Long Creek 03040105 C 1.60 9.50 64.00 1.34 48.32 mg/L (Avg) 73.34 mg/L (Avg) - - - - - - - - ------ 49.84mg/L 49.61 mg/L Par01 Par02 Par03 Par04 Par05 Par06111111 Par07 Par08 Par09 Par10 Par11 Par12 Par13 Par14 Par15 Par16 Par17 Parts Par19 Par20 Par21 Par22 Par23 Par24 Table 2. Parameters of Concern Name w4s Type Chronic ModIer 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 0.9937 FW 5.8913 ug/L Chlorides Aquatic Life NC 230 FW 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 207.1538 FW 1586.3974 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 14.2100 FW 19.9718 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 6.3630 FW 162.4349 ug/L Mercury Aquatic Life NC 12 FW 0.5 ng/L Molybdenum Human Health NC 2000 HH ug/L Nickel Aquatic Life NC 66.7414 1 FW 598.5140 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 0.9632 ug/L Zinc Aquatic Life NC 227.3878 FW 224.6462 ug/L Bis (2-ethylhexyl) phthalate Human Health C 0.37 HH pg/L 24244 Freshwater RPA 16.0 MGD, input 1 /27/2023 Alebemarle - Long Creek WWTP - NC0024244 Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators MAXIMUM Qw (MGD) = 16.0000 1Q10S (cfs) = 1.34 7Q10S (cfs) = 1.60 7Q10W (cfs) = 9.50 30Q2 (cfs) = NO 30Q2 DATA Avg. Stream Flow, QA (cfs) = 64.00 Receiving Stream: Long Creek HUC 03040105 DATA POINTS = 58 WWTP/WTP Class: Grade IV IWC% @ 1Q10S = 94.87375669 IWC% @ 7Q10S = 93.93939394 IWC% @ 7Q10W = 72.303207 IWC% @ 30Q2 = N/A IW%C @ QA = 27.92792793 Stream Class: C Outfall 001 Qw = 16 MGD COMBINED HARDNESS (mg/L) Acute = 49.61 mg/L Chronic = 49.84 mg/L PARAMETER NC STANDARDS OR EPA CRITERIA Y) REASONABLE POTENTIAL RESULTS RECOMMENDED ACTION TYPE J a z Applied Chronic Acute n # Det. Max Pred Cw Allowable Cw Standard Acute (FW): 358.4 Arsenic C 150 FW(7Q10s) 340 ug L 22 1 3.1 Chronic (FW): 159.7 No RP, Predicted Max < 50% of Allowable Cw - No No value > Allowable___Cw Monitoring required Arsenic C 10 HH/WS(Qavg) ug/L Chronic (HH): 35.8 No value > Allowable Cw Acute: 68.51 Beryllium NC 6.5 FW(7Q10s) 65 ug L 3 0 1.50 Note: n 5 9 C.V. (default) Chronic: 6.92 No detects; no monitoring required Limited data set NO DETECTS Max MDL = 1 Acute: 6.210 Cadmium NC 0.9937 FW(7Q10s) 5.8913 ug L 48 2 1.590 Chronic: 1.058 RP shown - apply Monthly Monitoring with Limit 2 values > Allowable Cw Acute: NO WQS Chlorides NC 230 FW(7Q10s) mg/L 0 0 N/A Chronic:----- 244.8 Acute: NO WQS Chlorinated Phenolic Compounds NC 1 A(30Q2) ug/L 0 0 N/A Chronic:-----IWC?------------------------------ Acute: NO WQS Total Phenolic Compounds NC 300 A(30Q2) ug/L 3 0 30.0 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Note: n 5 9 C.V. (default) Chronic: IWC? No detects; no monitoring required Limited data set NO DETECTS Max MDL = 20 Acute: 1,672.1 Chromium III NC 207.1538 FW(7Q10s) 1586.3974 µg/L 0 0 N/A Chronic:----- 220.5 Acute: 16.9 Chromium VI NC 11 FW(7Q10s) 16 µg/L 46 12 6.0 Chronic: 11.7 No RP , Predicted Max z 50% of Allowable Cw - No value > Allowable Cw apply Quarterly Monitoring Tot Cr value(s) > 5 but < Cr VI Allowable Cw Chromium, Total NC µg'L 4 4 18.1 Max reported value = 7 No monitoring required as Reported Max value is < Note: n 5 9 C.V. (default) Cr-VI allowable Cw. Limited data set 24244 Freshwater RPA 16.0 MGD, rpa Page 2 of 3 1/27/2023 Alebemarle - Long Creek WWTP - Outfall 001 NCO024244 Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators Qw = 16 MGD Acute: 21.05 Copper NC 14.2100 FW(7QlOs) 19.9718 ug/L 50 49 55.12 Chronic: 15.13 RP shown - apply Monthly Monitoring with Limit 26 values > Allowable Cw Acute: 23.2 Cyanide NC 5 FW(7QlOs) 22 10 ug/L 22 3 38.3 Chronic: 5.3 RP shown - apply Monthly Monitoring with Limit 1 values > Allowable Cw Acute: NO WQS Fluoride NC 1800 FW(7QlOs) ug/L 0 0 N/A Chronic:-----1,916.1 -- ------------------------- Acute: 171.212 Lead NC 6.3630 FW(7QIOs) 162.4349 ug/L 21 1 3.630 Chronic: 6.773 No RP , Predicted Max >_ 50% of Allowable Cw - No value > Allowable Cw apply Quarterly Monitoring Acute: NO WQS Mercury NC 12 FW(7QlOs) 0.5 ng/L 0 0 N/A --- ------------------------- Chronic:----- 12.8 Acute: NO WQS Molybdenum NC 2000 HH(7QlOs) ug/L 22 1 209.0 Chronic: 2,129.0 No RP, Predicted Max < 50% of Allowable Cw - No No value > Allowable Cw Monitoring required Acute (FW): 630.9 Nickel NC 66.7414 FW(7QlOs) 598.5140 µg/L 21 12 6.8 Chronic (FW): 71.0 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): 26.6 No value > Allowable Cw Acute: 59.0 Selenium NC 5 FW(7QlOs) 56 ug/L 21 0 6.2 _ _ _ _ _ _ _ _ Chronic: 5.3 _ _ _ _ _ _ _ _ _ _ _ _ _ _ No detects; no monitoring required NO DETECTS Max MDL =10 Acute: 1.015 Silver NC 0.06 FW(7QlOs) 0.9632 ug/L 21 2 3.525 Chronic: 0.064 1 detection within past three years - apply quarterly 21 values > Allowable Cw monitoring. Acute: 236.8 Zinc NC 227.3878 FW(7QlOs) 224.6462 ug/L 21 21 274.2 Chronic:----- 242.1 No value > Allowable Cw Acute: NO WQS Bis (2-ethylhexyl) phthalate C 0.37 HH(Qavg) µg/L 16 0 8.45000 Chronic: 1.32484 All nondetects at < 2 ug/I for past 3 yrs - no NO DETECTS Max MDL = 10 monitoring required Acute: 0 0 N/A Chronic:--------------------------------- 24244 Freshwater RPA 16.0 MGD, rpa Page 3 of 3 1/27/2023 FACILITY: Alebemarle - Long Creek WWTP Outfall 001 NPDES PERMIT: NCO024244 Dissolved to Total Metal Calculator In accordance with Federal Regulations, permit limitations must be written as Total Metals per 40 CFR 122.45(c) PARAMETER Cadmium (d) 1 Cd -Trout strei Chromium III (d)( Chromium VI (d) Chromium. Total Lead (d)(h) Nickel(d)(h) Ni -WS streams Silver (d)(h,acut Zinc (d)(hl Beryllium Arsenic (c Receiving Receiving Rec. Stream NPDES Total Suspended Combined Combined Instream Instream Effluent Stream Stream Solids Hardness Hardness Wastewater Wastewater Upstream Hardness summer summer 7Q10 1Q10 Flow Limit -Fixed Value- chronic Acute Concentration Concentration Hardness Average 7Q10 (CFS) (MGD) [MGD] [MGD] mg/L) (mg/L) (mg/L) (Chronic) (Acute) Average (mg L) (mg/L) 1.6000 1.0323 0.8645 12.0000 10 50.304 50.004 92. 7792 93.2798 73.341176 48.3227 Upstream Hard Avg (mg/L) = 73.3412 EFF Hard Avg (mg/L) = 48.3227 Dissolved Metals Criteria US EPA Total Metal Criteria Total Metal = COMMENTS (identify parameters to PERCS Branch to maintain in facility's LTMP/STMP): after applying hardness Translators- using Dissolved Metal +Translator equation Default Partition ChronicI Acute Coefficients Chronic Acute u /I u /I streams) [ug/11 rul 0.251 1.50 0.252 1.001 5.93 42 3231 0.202 208.74 1596.83 11 161 1.000 11.00 16.00 N/A N/A 5.0 7.0 0.348 14.32 20.12 1.18 30 0.184 6.43 163.88 29 261 0.432 67.27 602.58 25 N/A 0.06 0.98 1.0001 0.061 0.98 66 65 0.2881 229.19 226.18 1.0001 W 6.51 V 65 1.0001 1501 340 (d) = dissolved metal standard. See 15A NCAC 02B .0211 for more information. (h) = hardness -dependent dissolved metal standard. See 15A NCAC 02B .0211 for more information. (t) = based upon measurement of total recoveable metal. See 15A NCAC 02B .0211 for more information. The Human Health standard for Nickel in Water Supply Streams is 25 mg/L which is Total Recoverable metal standard. The Human Health standard for Arsenic is 10 µg/L which is Total Recoverable metal standard. FACILITY: Alebemarle - Long Creek WWTP Outfall 001 NPDES PERMIT: NCO024244 Dissolved to Total Metal Calculator In accordance with Federal Regulations, permit limitations must be written as Total Metals per 40 CFR 122.45(c) PARAMETER Cadmium (d) Cd -Trout stre. Chromium III (d)( Chromium VI (d) Chromium, Total Lead Nickel Ni-W! Silver Zinc (c Beryllium Arsenic (c Receiving Stream Receiving Stream Rec. Stream NPDES Total Suspended Solids Combined Hardness Combined Hardness Instream Instream Wastewater Wastewater UpstreamHardness Effluent summer summer 7Q10 1Q10 Flow Limit -Fixed Value- chronic Acute Concentration Concentration Hardness Average 7Q10 (CFS) (MGD) [MGD] [MGD] ( mg/L) (mg/L) (mg/L) (Chronic) (Acute) Average (mg/L) (mg/L) 1.6000 1.0323 0.8645 16.0000 10 49.839 49.605 93.9394 94.8738 73.341176 48.3227 Upstream Hard Avg (mg/L) = 73.3412 EFF Hard Avg (mg/L) = 48.3227 Dissolved after applying e Metals Criteria hardness uation Acute u /I US EPA Translators- using Default Partition Coefficients streams Total Metal Criteria Total Metal = Dissolved Metal, Translator COMMENTS (identify parameters to PERCS Branch to maintain in facility's LTMP/STMP): Chronic Chronic Acute u /I u /I u /I 0.25 1.49 0.252 0.99 5.89 0.25 0.92 0.99 3.66 42 321 0.202 207.15 1586.40 11 16 1.000 11.00 16.00 N/A N/A 4.9 6.9 0.348 14.21 19.97 1.17 30 0.184 6.36 162.43 29 259 0.432 66.74 598.51 25 0.06 0.96 1.000 0.061 0.96 65 65 0.288 227.39 224.65 1 nool 6.5 65 1.0001 1501 340 (d) = dissolved metal standard. See 15A NCAC 02B .0211 for more information. (h) = hardness -dependent dissolved metal standard. See 15A NCAC 02B .0211 for more information. (t) = based upon measurement of total recoveable metal. See 15A NCAC 02B .0211 for more information. The Human Health standard for Nickel in Water Supply Streams is 25 mg/L which is Total Recoverable metal standard. The Human Health standard for Arsenic is 10 µg/L which is Total Recoverable metal standard. Permit No. NC0024244 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/1 (Dissolved) Chronic FW, µg/1 (Dissolved) Acute SW, µg/l (Dissolved) Chronic SW, µg/l (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 213.0200 (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^{0.9151 [In hardness]-3.1485{ Cadmium, Acute Trout waters WER*{1.136672-[ln hardness](0.041838)} e^{0.9151[In hardness]-3.6236} Cadmium, Chronic WER*{1.101672-[ln hardness](0.041838)} e^{0.7998[ln hardness]-4.4451} 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]-1.4601 Lead, Chronic WER*{1.46203-[ln hardness](0.145712)} • ell {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. NCO024244 Silver, Acute WER*0.85 • e^{1.72[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/WQBELs 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, 7Q 10 (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. NCO024244 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, mg2) (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 1 + { [Kpo] [ss(I+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. NC0024244 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 48.3 Permittee submitted DMRs (Total as CaCO3) Average Upstream Hardness, mg/L 73.3 Permittee submitted DMRs (Total as CaCO3) 7Q10 summer (cfs) 1.6 Reported in previous permit Fact Sheet 1Q10 (cfs) 1.34 Calculated in RPA spreadsheet Permitted Flow (MGD) 12.0 Design flow Date: November 1, 2022 Permit Writer: Gary Perlmutter Page 4 of 4 1/27/23 WQS = 12 ng/L MERCURY WQBEL/TBEL EVALUATION V:2013-6 Facility Name Albemarle - Long Creek WWTP / NC0024244 FALSE /Permit No. MMP Required Total Mercury 1631E PQL = 0.5 ng/L 7Q10s = 1.600 cfs WQBEL = 13.03 ng/L Date Modifier Data Entry Value Permitted Flow = 12.000 47 ng/L 8/7/18 23.8 23.8 9/11/18 11.6 11.6 9/25/18 1.3 1.3 10/2/18 1.8 1.8 11/29/18 3.8 3.8 12/5/18 9.6 9.6 8.7 ng/L - Annual Average for 2018 1/10/19 18.3 18.3 2/7/19 < 1 0.5 3/12/19 < 1 0.5 6/6/19 7.21 7.21 9/10/19 1.7 1.7 12/3/19 4.7 4.7 5.5 ng/L - Annual Average for 2019 3/10/20 10 10 6/2/20 4.1 4.1 9/9/20 13.8 13.8 12/3/20 9.5 9.5 9.4 ng/L - Annual Average for 2020 3/4/21 6.1 6.1 6/3/21 13.1 13.1 9/14/21 5.3 5.3 12/7/21 < 1 0.5 6.3 ng/L - Annual Average for 2021 3/3/22 10.5 10.5 6/2/22 5.6 5.6 9/13/22 28.4 28.4 WQBEL< 14.8 ng/L - Annual Average for 2022 1/27/23 WQS = 12 ng/L MERCURY WQBEL/TBEL EVALUATION V:2013-6 Facility Name Albemarle - Long Creek WWTP / NC0024244 FALSE /Permit No. MMP Required Total Mercury 1631E PQL = 0.5 ng/L 7Q10s = 1.600 cfs WQBEL = 12.77 ng/L Date Modifier Data Entry Value Permitted Flow = 16.000 47 ng/L 8/7/18 23.8 23.8 9/11/18 11.6 11.6 9/25/18 1.3 1.3 10/2/18 1.8 1.8 11/29/18 3.8 3.8 12/5/18 9.6 9.6 8.7 ng/L - Annual Average for 2018 1/10/19 18.3 18.3 2/7/19 < 1 0.5 3/12/19 < 1 0.5 6/6/19 7.21 7.21 9/10/19 1.7 1.7 12/3/19 4.7 4.7 5.5 ng/L - Annual Average for 2019 3/10/20 10 10 6/2/20 4.1 4.1 9/9/20 13.8 13.8 12/3/20 9.5 9.5 9.4 ng/L - Annual Average for 2020 3/4/21 6.1 6.1 6/3/21 13.1 13.1 9/14/21 5.3 5.3 12/7/21 < 1 0.5 6.3 ng/L - Annual Average for 2021 3/3/22 10.5 10.5 6/2/22 5.6 5.6 9/13/22 28.4 28.4 WQBEL< 14.8 ng/L - Annual Average for 2022 December 13, 2022 Gary Perlmutter, M.Sc. Environmental Specialist II, Division of Water Resources North Carolina Department of Environmental Quality Office: (919) 707-3611 1 Cell: (919) 306-1017 gary.perlmutter@ncdenr.gov NPDES PERMIT#NC0024244 City of Albemarle NC WWTP ADDITIONAL INFORMATION FOR RENEWAL Chemical Addendum and Supplemental Datasheets Mr. Perlmutter, In previous correspondence concerning the completeness of the City of Albemarle's NPDES permit renewal, it was pointed out that the application was short a process narrative to describe the process flow diagram, and it lacked the Chemical Addendum and Supplemental Datasheet for emerging pollutants from Industrial Users. The division was been previously sent process narrative and was accepted. The Industrial Users in Albemarle include; • The City of Albemarle Landfill Leachate, • Auria Corporation, Car Parts • Creative Dyeing, Textile Coloring Here we submit the Chemical Addendum and Supplemental Datasheets requested. The two Industrial users were queried for the types of compounds they use in their processes and they responded with all of the MSDS sheets of the chemicals they use in their processes. Many of the sheets describe dyes and resins and ph adjusting compounds mixed with other components. Most of the MSDS sheets describe the principal characteristics of the material with respect to safety but do not list whether they include any of the PFAS compounds in the list or illude to any analytical method for testing the material. Here in we submit the MSDS sheets as reference to these compounds The City of Albemarle land fill (the third industry) leachate was sampled on 11/18/2022 by Environment 1 and forwarded the samples to Enthalpy Analytical in Wilmington, NC for analyzing the PFAS compounds and 1,4 Dioxane. Enthalpy Analytical did not use method EPA 12633 for testing but rather used EU-047 PFAS by Isotope Dilution for non -potable water method. A full description of their technique is included herein. The value of the PFAS compounds measured are included in a spreadsheet format titled, ALBEMARLE Chem Addendum - Supplemental Datasheet.xlsx since the method is not approved. The single Dioxane test is presented on the file Albemarle Chemical-Addendum-to-NPDES- application.xlsx. The average daily flow from the landfill over the last three years was 31,591 gallons per day. Than ou Brandon W. Plyler City of Albemarle Long Creek WWTP Treatment Plant Supervisor ATTACHMENTS ALBEMARLE Chem Addendum - Supplemental Datasheet.xlsx Albemarle Chemical-Addendum-to-NPDES-application.xlsx. CHEMICALS USED AND TEST RESULTS.zip Cc; Barry King PE #33270, Principal Engineer, SK Environment & Engineering PLLC EPA Identification Number NPDES Number Facility Name Outfall Number NC0024244 City of Albemarle W WTP 1 Method Number Estimated Concentration (If Pollutant (Required) CAS number (if Applicable) Reason Pollutant Believed Present in Discharge Known) 1,4 Dioxane 123-91-1 EPA 624.1 Pollutant measured in Land Fill Leachate as shown 35.3 ug/L City of Albemarle NPDES NCO024244 Sample Results from City Of Albemarle Landfill Leachate Discharge 18-Nov-22 Effluent Grab (ng/L) CAS Number Analyte Name Acronym NOTE 113507-82-7 Perfluoro(2-ethoxyethane)sulphonic acid PFEESA <LOD (1.20) U U 13252-13-6 Hexafluoropropylene oxide dimer acid HFPO-DA <LOD(1.14)U U 151772-58-6 Perfluoro-3,6-dioxaheptanoic acid NFDHA <LOD(1.20)U U 1691-99-2 N-Ethyl-N-(2-hydroxyethyl)perfluorooctylsulphonamide N-EtFOSE <LOD (36.0) U U 1763-23-1 Perfluorooctanesulfonic acid PFOS 667 2058-94-8 Perfluoroundecanoic acid PFUnA 1.52 J 2355-31-9 2-(N-Methylperfluorooctanesulfonamido) acetic acid N-McFOSAA 280 24448-09-7 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecafluoro-N-(2- hydroxyethyl)-N-methyloctane-l-sulfonamide N-McFOSE <LOD (36.0) U U 2706-90-3 Perfluoropentanoic acid PFPeA 851 2706-91-4 Perfluoropentanesulfonic acid PFPeS 60.9 27619-97-2 1-Octanesulfonic acid, 3,3,4,4,5,5,6,6,7,7,8,8,8- tridecafluoro- 6:2 FTS 103 2991-50-6 2-(N-Ethylperfluorooctanesulfonamido) acetic acid N-EtFOSAA 41.8 307-24-4 Perfluorohexanoic acid PFHxA 1280 307-55-1 Perfluorododecanoic acid PFDoA <LOD (1.01) U U 31506-32-8 Heptadecafluoro-N-methyloctane-l-sulphonamide N-McFOSA <LOD (1.20) U U 335-67-1 Perfluorooctanoic acid PFOA 1060 335-76-2 Perfluorodecanoic acid PFDA 30.9 335-77-3 Perfluorodecanesulfonic acid PFDS <LOD (0.960) U U 355-46-4 Perfluorohexanesulfonic acid PFHxS 209 356-02-5 3-Perfluoropropyl Propanoic Acid 3:3 FTCA 67.3 375-22-4 Perfluorobutanoic acid PFBA 588 375-73-5 Perfluorobutanesulfonic acid PFBS 185 375-85-9 Perfluoroheptanoic acid PFHpA 410 375-92-8 Perfluoroheptanesulfonic acid PFHpS 14.7 375-95-1 Perfluorononanoic acid PFNA 59.3 376-06-7 Perfluorotetradecanoic acid PFTeA <LOD(1.09)U U 377-73-1 Perfluoro-3-methoxypropanoic acid PFMOPrA <LOD(1.20)U U 39108-34-4 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10- Heptadecafluorodecanesulphonic acid 8:2 FTS 6.91 4151-50-2 Sulfluramid N-EtFOSA <LOD (1.20) U U 68259-12-1 Perfluorononanesulfonic acid PFNS <LOD (0.432) U U 72629-94-8 Perfluorotridecanoic acid PFTriA <LOD (0.755) U U 754-91-6 Perfluorooctanesulfonamide PFOSA 13.2 756426-58-1 Perfluoro(2-((6-chlorohexyl)oxy)ethanesulfonic acid) 9CI-PF30NS <LOD (0.600) U U 757124-72-4 1H,1H,2H,2H-Perfluorohexanesulphonic acid 4:2 FTS 2.2 J 763051-92-9 2-(8-chloro-1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8- hexadecafluorooctoxy)-1,1,2,2-tetrafluoroethanesulfonic acid 11CI-PF3OUdS <LOD (0.600) U U 79780-39-5 Perfluorododecanesulfonic acid PFDoS <LOD (11.2) U U 812-70-4 2H,2H,3H,3H-Perfluorodecanoic acid 7:3 FTCA 69.9 863090-89-5 Perfluoro-4-methoxybutanoicAcid PFMOBA <LOD (7.20) U U 914637-49-3 2H,2H,3H,3H-Perfluorooctanoic Acid 5:3 FTCA 3040 919005-14-4 4,8-Dioxa-3H-perfluorononanoic acid ADONA <LOD (0.600) U U NO - Indicates a non -detect. U - The analyte was not detected. The Estimated Detection Limit (EDL) may be reported for this analyte. J - Indicates that an analyte has a concentration below the reporting limit (lowest point of the calibration curve). Industrial User: AURIA SAFETY DATA SHEETS Product Name PFAS present 2-1-3144-E not specified 2-J-3234-C not specified 10-1-3025-13 possible 14-J-3568-D not specified Industrial User: Creative Dveine Product Name Document type LUMACRON RUBINE XLD SDS VIRCO SOIL RID SDS ACETIC ACID SOLUTION SDS ALBAFLUID®C SDS BARBALUBE® FL-62 Tech Bull. CAUSTIC SODA 25%-50% SDS CEKAPENE NON Tech Bull. CITRIC ACID SDS Dianix Red AM -SLR SDS Dianix Yellow AM -SLR 200% SDS Eganal PS liq SDS Foron Navy S-RD SDS Foron Orange SE-RD SDS Foron Red S-WF SDS HYDROGEN PEROXIDE 50% SDS INTRATEX CA2 NEW Tech Bull. INVADINE® DA-01 SDS Procion® Brilliant Red H-EGXL SDS Procion Crimson H-EXL SDS Procion Yellow H-EXL SDS Sanitized TH 27-24 SDS UVITEX® BH-B LIQ. SDS UVITEX® BHT -AM LIQ. SDS UVITEX® BH-V LIQ. SDS Sera Wash M-VFN SDS SODA ASH LIGHT SDS SODIUM ACETATE SDS SODIUM HYDROSULFITE 90% SDS SODIUM METABISULFITE SDS SODIUM SULFATE SDS SODIUM THIOSULFATE SDS Solegal Cold WF liq SDS SOLV-IT Tech Bull. Sora Quest CM -MI SDS Sora Sperse PC -CA SDS ULTRAPHIL®TG SDS VIRCO SOIL RID Tech Bull. VIRCOLON SPECIAL #2 Tech Bull. Hazardous Chemical Notes none listed No chemical information provided none listed No chemical information provided Antimony compound Described as synthetic polymer compound none listed No chemical information provided PFAS present Hazardous Chemical Notes methyl N-[3-(acetylamino)-4-[(4- n itro phe nyl)azo] p henyl]-N-(3-methoxy-3- not likely oxopropyl)-p alaninate Described as dyestuff mixture possible Described as nonionic hydrophilic polymer dispersion NO not specified Described as mixture not specified Described as DYEBATH LUBRICANT FOR SYNTHETIC AND NATURAL FI NO possible Described as Nonionic surfactant blend NO not specified Described as textile dye not specified Described as textile dye not specified Described as Aqueous solution of a linear polycondensate N-[2-[(2-b ro mo-4,6-di nitrophenyl )azo]-5- not specified (diethylamino)phenyl]acetamide Described as Disperse Dyes 2-phthalimidoethyl N-[4-(2-cyano-4- n itro phe nylazo) phe nyl]-N-methyl-Q- not specified alaninate Described as azo dyestuff not specified Sodium sulphate Described as azo dyestuff NO Described as COMPATIBILIZER AND ANTI -PRECIPITANT not specified not specified five listed chemicals, none PFAS not specified Described as textile dye not specified Described as textile dye not specified Described as azo reactive dyestuff, not likely Zinc pyridinethione Described as antimicrobic not likely urea not likely urea not likely sodium hydroxide not specified 2-methyl-2,4-pentanediol NO Sodium Carbonate NO NO Sodium dithionite NO Described as Sulfite Salt NO Described as Sulfate Salt NO Sodium thiosulfate, pentahydrate Described as Thiosulfate Salt not likely Described as benzophenone derivativeanionic not specified Described as MULTIFUNCTIONAL DYEING ASSISTANT not likely Phosphoric acid, sodium hydroxide not specified not specified 2-methyl-2H-isothiazol-3-one not specified Described as NONIONIC LIQUID not specified Described as LOW FOAMING MACHINE CLEANER