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HomeMy WebLinkAboutNC0088552_Fact Sheet_20200107DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 Fact Sheet NPDES Permit No. NCO088552 Permit Writer/Email Contact: Derek Denard, derek.denard@ncdenr.gov Date: 07Jan2020 Division/Branch: NC Division of Water Resources/Water Quality Permitting Section Compliance & Expediated Permitting Branch Fact Sheet Template: Version 28Mar2019 Permitting Action: ❑X Renewal ❑ Renewal with Expansion ❑ New Discharge ❑ Modification (Fact Sheet should be tailored to mod request) Note: See Attachment A: NCO088552 Renewal Application, FORM C-WTP Complete applicable sections below. If not applicable, enter NA. 1. Basic Facility Information Facility Information Applicant/Facility Name: Aqua North Carolina, Inc. / Colonial Woods Subdivision — Wells 41 & #2 WTP Applicant Address: 202 Mackenan Ct, Cary, NC 27511 Facility Address: Atkins Lane, Mt. Airy 27030 Permitted Flow: Not limited Facility Type/Waste: MINOR; 100% industrial/ Water Plants and Water Conditioning Discharge —filter-backwash - Greensand WTP System Facility Class: Physical Chemical Not Classified Treatment Units: two (2) greensand filters for Well 91; five (5) greensand filters for Well #2; for both chemical usage consisting of Potassium permanganate, Chlorine and caustic soda Pretreatment Program (Y/N) No County: Surry Region Winston-Salem Briefly describe the proposed permitting action and facility background.- This facility is a greensand water treatment plant with discharge of wastewaters from media filter backwash, with a design potable flowrate of 0.03024 MGD (both Wells 91 & 92), a design backwash/reject flow of 0.00100 MGD (both Wells 91 & 92) and a maximum, monthly average wastewater discharge of 0.001 MGD (Well 91) and 0.001239 MGD (Well 92). [See Attachment A: NCO088552 Renewal Application, FORM C-WTP] Page 1 of 10 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 NCG590000 Eli ibg ility: This facility is not eligible for coverage under General Permit NCG590000 for the of discharge backwash wastewaters from greensand and conventional type water treatment facilities because of the limitation of Zinc. Eligibility is based on the following (See Attachment B: General Permit NCG590000 Section A. Coverage, p. 2 of 26). • The facility is a greensand technology water treatment system. • There are no toxicity issues (monitoring is not applicable under WTP strategy for greensands). • There are no WQBELs required for toxicants such as Zinc. • The discharge is not mixed with other process wastewaters. • The discharge is not to waters classified as High Quality Waters (HQW) or Outstanding Resource Waters (ORW). • The discharge is not from water purification systems using Membrane Treatment (Reverse Osmosis) or Ion Exchange. • The discharge would not adversely affect a Federal or State listed endangered or threatened species or its critical habitat. The discharge is not of pollutants to an impaired waterbody in excess of the wasteload allocation specified in an EPA -Approved TMDL (Total Maximum Daily Load). Facility Location: Latitude and Longitude were verified as the following: 001 36.41109140 N,-80.62476690 W [entered into BIMS as 360 24' 40" and -800 37' 29"] 002 36.41107970 N,-80.62871610 W [entered into BIMS as 360 24' 40" and -800 37' 43"] See Attachment C: Map pages from EAA 2007303, 2 pages. Additional Information Requested for Application: Additional information was requested for Hardness data (Attachment D) on May 6, 2019 (due by July 13, 2019). Hardness data was received in response to the additional information request on July 2, 2019 (Attachments E & F). 2. Receiving Waterbody Information: Receiving Waterbody Information Outfalls/Receiving Stream(s): Outfalls 001 & 002- UT to Bull Creek Stream Segment: 12-72-15 Stream Classification: C Drainage Area (m12): -- Summer 7Q10 (cfs) 0 Winter 7Q10 (cfs): 0 30Q2 (cfs): 0 Average Flow (cfs): 0 IWC (% effluent):] 100% 303(d) listed/parameter: No — See Attachment G: 2018 NC Integrated Report, p. 1538 Subject to TMDL/parameter: No — 2011 Turbidity TMDLs in the Yadkin River Basin: Muddy Creek and the Yadkin River. The Mitchell River is not impaired for Turbidity. Basin/Subbasin/HUC: Yadkin -Pee Dee; 03-07-03 [HUC: 030401010903] USGS Topo Quad: Dobson, NC Page 2 of 10 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 3. Effluent Data Summary Effluent data is summarized below for the period May2014 through Oct2018 Table. Effluent Data Summary Data Limits Out] • Parameter Max Min Average Count MA DM PQL UoM Errors -001 00070 - Turbidity 37 0.04 1.13 106 ntu no 00076 -Turbidity, HCH Turbidim iter 0.9 0.45 0.7 2 ntu no 00400 - pH 9 5.6 10B Not < 6.0 or > 9.0 su no 01045 - ton, Total (as Fe) 82200 18 ugA yes 01055 - Manganese, Total (as Mn) 29600 18 ugA yes 01092 - Zinc, Total (as Zn) 67 17 ugA yes 50050 - Flmw, in conduit or thru treatment plant 0.0012 0.0008 0.0010 971 mgd no 50060 - Chlorine, Total Residual 28 108 17 20 ugA yes C0530 - Solids, Total Suspended - Concentration 15 2.5 4.0 107 30 45 2.5 mg/l no -002 00070 - Turbidity 39 0.2 16-1 76 ntu no 00076-Turbidity,HCHTurbidimiter 33 22 27.5 2 ntu no 00400-pH 9 6.7 i'5.91 78 Not <6.0or>9.0 su no 01045 - ton, Total (as Fe) 38700DO 16 ugA yes 01055 - Manganese, Total (as Mn) 15300 13 ugA yes 01092 - Zinc, Total (as Zn) 101 12 ugA yes 50050 - Flow, in conduit or thru treatment plant 0.008 0.0008 0.0011 513 mgd no 50060 - Chlorine, Total Residual 25 78 17 20 ugA yes C0530 - Solids, Total Suspended - Concentration 42 3.1 12.8 78 30 45 2.5 mg/l no MA = monthly average; DM = daily maximum; PQL = practical quantitation limit; UoM = Unit of Measure Table. Data Reporting Errors Outfall Date Parameter UoM Value Modifier comments 001 2/24/2015 01055 - Manganese, Total (as Mn) ug/I 0.0116 UoM mg/L? 001 6/16/2015 50060 - Chlorine, Total Residual ug/I 0 PQL? 001 6/28/2016 50060 - Chlorine, Total Residual ug/I 0 PQL? 002 6/28/2016 50060 - Chlorine, Total Residual ug/I 0 PQL? 001 8/9/2016 01055 - Manganese, Total (as Mn) ug/I 0.019 UoM mg/L? 001 11/15/2016 01055 - Manganese, Total (as Mn) ug/I 0.028 UoM mg/L? 002 11/15/2016 01055 - Manganese, Total (as Mn) ug/I 1.22 UoM mg/L? 002 12/6/2016 50060 - Chlorine, Total Residual ug/I 0 PQL 001 2/22/2017 01045 - Iron, Total (as Fe) ug/I 0.048 UoM mg/L? 001 2/22/2017 01055 - Manganese, Total (as Mn) ug/I 0.03 UoM mg/L? 001 2/22/2017 01092 - Zinc, Total (as Zn) ug/I 0.053 UoM mg/L? 002 2/22/2017 01045 - Iron, Total (as Fe) ug/I 0.556 UoM mg/L? 002 2/22/2017 01055 - Manganese, Total (as Mn) ug/I 1.13 UoM mg/L? 002 2/22/2017 01092 - Zinc, Total (as Zn) ug/I 0.035 UoM mg/L? 001 5/9/2017 01045 - Iron, Total (as Fe) ug/I 0.163 UoM mg/L? 001 5/9/2017 01055 - Manganese, Total (as Mn) ug/I 0.018 UoM mg/L? 001 5/9/2017 01092 - Zinc, Total (as Zn) ug/I 0.01 LESSTHAN UoM mg/L? 002 5/9/2017 01092 - Zinc, Total (as Zn) ug/I 0.03 UoM mg/L? 002 6/26/2018 50060 - Chlorine, Total Residual ug/I 0 PQL? 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 I mg/l of instream standard at full permitted flow; 2) to verify model predictions for outfall diffuser; 3) to provide data for future TMDL; 4) based on other instream concerns. Instream monitoring may be conducted by the Permittee, and there are also Monitoring Coalitions established in several basins that conduct instream sampling for the Permittee (in which case instream monitoring is waived in the permit as long as coalition membership is maintained). Page 3 of 10 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 If applicable, summarize any instream data and what instream monitoring will be proposed for this permit action: Quarterly upstream Hardness monitoring has been added for Outfall 002 to provide a baseline for establishing limitation of hardness depend metals such as Zinc. 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): See Attachment H: Monitoring Report Violations Nov2013 to Oct2018, 1 page. There was a daily maximum exceedance and a monthly average exceedance in July 2017. A NOV was sent for those violations. Another daily exceedance of TSS occurred in May 2018. As of December 2018, no action has been taken for this violation. Summarize the compliance record with aquatic toxicity test limits and any second species test results (past 5 years): NA. Summarize the results from the most recent compliance inspection: See Attachment L NC0088552_Inspection Report _20181106, 5 pages. 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 W; 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. Oxvaen-Consumina Waste Limitations Limitations for oxygen -consuming waste (e.g., BOD) are generally based on water quality modeling to ensure protection of the instream dissolved oxygen (DO) water quality standard. Secondary TBEL limits (e.g., BOD= 30 mg/1 for Municipals) may be appropriate if deemed more stringent based on dilution and model results. Ifpermit limits are more stringent than TBELs, describe how limits were developed: NA. Ammonia and Total Residual Chlorine Limitations Limitations for ammonia are based on protection of aquatic life utilizing an ammonia chronic criterion of 1.0 mg/1 (summer) and 1.8 mg/1(winter). Acute ammonia limits are derived from chronic criteria, utilizing a multiplication factor of 3 for Municipals and a multiplication factor of 5 for Non -Municipals. Limitations for Total Residual Chlorine (TRC) are based on the NC water quality standard for protection of aquatic life (17 µg/1) and capped at 28 µg/1(acute impacts). Due to analytical issues, all TRC values reported below 50 ug/1 are considered compliant with their permit limit. Describe any proposed changes to ammonia and/or TRC limits for this permit renewal: Under zero flow conditions the daily maximum limit for TRC should be 17 µg/l. Page 4 of 10 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 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 213.0206. 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 May2014 to Oct2018. Pollutants of concern included toxicants with positive detections and associated water quality standards/criteria. Based on this analysis, the following permitting actions are proposed for this permit: • Effluent Limit with Monitoring: The following parameters will receive a water quality -based effluent limit (WQBEL) since they demonstrated a reasonable potential to exceed applicable water quality standards/criteria: Total Zinc (Outfall 002). • Summary of new limits added based on RPA: Parameter Outfall Monthly Average Daily Maximum Zinc 001 No Limit No Limit Zinc 002 187.8 µg/L 187.8 µg/L If applicable, attach a spreadsheet of the RPA results [See Attachment J (Outfall 001) and Attachment K (outfall 002)] as well as a copy of the Dissolved Metals Implementation Fact Sheet for freshwater/saltwater [See Attachment L] 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. Toxici . 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: NA. 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 (M1VIPs) for point source control. Municipal facilities > 2 MGD and discharging quantifiable levels of mercury (>1 ng/1) will receive an MMP requirement. Industrials are evaluated on a case -by -case basis, depending if mercury is a Page 5 of 10 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 pollutant of concern. Effluent limits may also be added if annual average effluent concentrations exceed the WQBEL value (based on the NC WQS of 12 ng/1) and/or if any individual value exceeds a TBEL value of 47 ng/l. Describe proposed permit actions based on mercury evaluation: NA. Other TMDL/Nutrient Management Strategy Considerations If applicable, describe any other TNDDLs/Nutrient Management Strategies and their implementation within this permit: NA. Other WQBEL Considerations If applicable, describe any other parameters of concern evaluated for WQBELs: NA. If applicable, describe any special actions (HQW or ORW) this receiving stream and classification shall comply with in order to protect the designated waterbody: NA. If applicable, describe any compliance schedules proposed for this permit renewal in accordance with 15A NCAC 2H 0107(c)(2)(B), 40CFR 122.47, and EPA May 2007 Memo: NA. If applicable, describe any water quality standards variances proposed in accordance with NCGS 143- 215.3(e) and 15A NCAC 2B. 0226 for this permit renewal: NA. 7. Technology -Based Effluent Limitations (TBELs) Total Suspended Solids (TSS) - TBEL. Secondary treatment standards/40 CFR 133 / 15A NCAC 213 .0406 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 213.0201. 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 (YESINO): NO. If YES, confirm that antibacksliding provisions are not violated: NA. Page 6 of 10 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 10. Monitoring Requirements Monitoring frequencies for NPDES permitting are established in accordance with the following regulations and guidance: 1) State Regulation for Surface Water Monitoring, 15A NCAC 213.0500; 2) NPDES Guidance, Monitoring Frequency for Toxic Substances (7/15/2010 Memo); 3) NPDES Guidance, Reduced Monitoring Frequencies for Facilities with Superior Compliance (10/22/2012 Memo); 4) Best Professional Judgement (BPJ). Per US EPA (Interim Guidance, 1996), monitoring requirements are not considered effluent limitations under Section 402(o) of the Clean Water Act, and therefore anti - backsliding prohibitions would not be triggered by reductions in monitoring frequencies. For instream monitoring, refer to Section 4. 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: A. Table. Current Permit Conditions and Proposed Changes — Outfall 001 Parameter Current Permit Proposed Change Basis for Condition/Change Flow Not limited No change 15A NCAC 2B .0505. Not limited per current WTP strategy. Total Suspended MA 30 mg/1 No change TBEL. Secondary treatment Solids (TSS) DM 45 mg/1 standards/40 CFR 133 / 15A NCAC 2B .0406 Total Residual DM 28 µg/L DM 17 µg/L WQBEL. State WQ standard, 15A Chlorine (TRC) NCAC 2B .0211 (3). Under zero flow conditions the standard of 17 µg/L applies. pH 6 — 9 SU No change WQBEL. State WQ standard, 15A NCAC 2B .0211 (14) Turbidity Not limited No change WQBEL. State WQ standard, 15A NCAC 2B .0211 (7) Total Zinc Not limited No change WQBEL. State WQ standard, 15A NCAC 213.0211 Total Manganese Not limited No change WTP Strategy parameter of concern Total Iron Not limited No change WTP Strategy parameter of concern MGD — Million gallons per day, MA - Monthly Average, DM — Daily Max Page 7 of 10 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 B. Table. Current Permit Conditions and Proposed Changes — Outfall 001 Parameter Current Permit Proposed Change Basis for Condition/Change Flow Not limited No change 15A NCAC 213 .0505. Not limited per current WTP strategy. Total Suspended MA 30 mg/1 No change TBEL. Secondary treatment Solids (TSS) DM 45 mg/1 standards/40 CFR 133 / 15A NCAC 213 .0406 Total Residual DM 28 µg/L DM 17 µg/L WQBEL. State WQ standard, 15A Chlorine (TRC) NCAC 213 .0211 (3). Under zero flow conditions the standard of 17 µg/L applies. pH 6 — 9 SU No change WQBEL. State WQ standard, 15A NCAC 213 .0211 (14) Turbidity Not limited No change WQBEL. State WQ standard, 15A NCAC 213 .0211 (7) Total Zinc Not limited MA 187.8 µg/L WQBEL. State WQ standard, 15A DM 187.8 µg/L NCAC 213.0211 Total Hardness No monitoring Monitoring added WQBEL. State WQ standard, 15A NCAC 213.0211 Total Manganese Not limited No change WTP Strategy parameter of concern Total Iron Not limited No change WTP Strategy parameter of concern MGD — Million gallons per day, MA - Monthly Average, DM — Daily Max Parameters of concern including measurements frequencies and sample type are in accordance with the October 14, 2009 WTP Strategy by Julie Grzyb, Table 4.1 for greensand technology (Attachment M) and Table 5.1 for monitoring frequencies (Attachment N). Sample type as "grab" is also determined by 15A NCAC 02B .0505 (c)(3). The permit renewal includes the following significant changes from the existing permit: 1. The facility map has been updated. 2. Regulatory citations have been added. 3. The facility classification Physical Chemical Not Classified WPCS was added to the effluent page. 4. For Outfalls 001 & 002, the limit for Total Residual Chlorine (TRC) under zero flow conditions is set at the water quality standard of 17 ug/1 for Class C waters. Please note that Footnote 2 stipulates the following: The Division shall consider compliant all TRC effluent values reported below 50 µg/L. However, the Permittee shall continue to record and submit all values reported by North Carolina - certified laboratory methods (including field certified), even if these values fall below 50 µg/L. 5. The NC 2007-2014 Water Quality Standard (WQS) Triennial Review was approved by the NC Environmental Management Committee (EMC) on November 13, 2014. The US EPA subsequently approved the WQS revisions on April 6, 2016 with some exceptions. The NC Division of Water Resources is required to implement the new dissolved metal standards in all permits public noticed after April 6, 2016. Page 8 of 10 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 The new standards for most metals include acute standards. Furthermore, the freshwater standards for several metals are expressed as the dissolved form of the metals, and seven metals have hardness -dependent equations. As a result, the Division will need site -specific effluent hardness data and instream hardness data, upstream of the discharge, for each facility monitoring these metals in order to calculate permit limitations. The metal of concern for this permit renewal is Zinc. To evaluate dissolved Zinc, a Reasonable Potential Analysis (RPA) was conducted using data from DMRs (May2014—Oct2018) [see attached RPA spreadsheets for Outfall 001]. Results indicated a reasonable potential to exceed the new dissolved metals standard for Zinc. Consequently, the following daily maximum limits (acute standard) and monthly average limits (in this case the acute standard) for Total Zinc could be applied for this permit renewal: Parameter Outfall Monthly Average Daily Maximum Zinc 001 No Limit No Limit Zinc 002 187.8 µg/L 187.8 µg/L Please note that the hardness -dependent water quality standard for zinc typically results in a more stringent permit limit for the acute total allowable metal verses the chronic value. In this situation, we use the acute total allowable metal concentration (permit limit) as the limitation for both the Daily Maximum and the Monthly Average. Hardness data received on July 2, 2019 was used for the calculation of these limits. Since this facility discharges under zero flow conditions a value of 0 was entered for all stream flow data. Please note that under zero flow conditions the RPA defaults to a value of 25 mg/L for the upstream Total Hardness. Additionally, the maximum monthly average flow of 0.0009 MGD from November 2015 to October 2018 (3 years) data was used as the effluent flow. For a summary of this information, please see the attached "Dissolved to Total Metal Calculator". For Outfall 002, please note that monitoring for Zinc is now monthly. 6. For Outfall 002, a compliance schedule [Section A. (3.)] has been added for Total Zinc limits found in Section A. (2.). The Total Zinc limits will become effective 60 months from the effective date of the permit instead of 48 months as drafted. 7. Outfall 002, Effluent Hardness Sampling was added with quarterly sampling to maintain a hardness database for this facility. Please note footnote 5 requires that Effluent hardness sampling be performed in conjunction with sampling for hardness dependent metals (Zinc). 13. Public Notice Schedule: Permit to Public Notice: 07/14/2019 [See Attachment O] Per 15A NCAC 2H .0109 & .0111, The Division will receive comments for a period of 30 days following the publication date of the public notice. Any request for a public hearing shall be submitted to the Director within the 30 days comment period indicating the interest of the party filing such request and the reasons why a hearing is warranted. 14. 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: For Outfall 002, a compliance schedule [Section A. (3.)] has been added for Total Zinc limits found in Section A. (2.). The Total Zinc limits will become effective 60 months from the effective date of the permit instead of 48 months as drafted. Page 9 of 10 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 15. Fact Sheet Attachments (if applicable): A. NC0088552 Renewal Application, 20180709, 8 pages. B. General Permit NCG590000 Section A. Coverage, p. 2 of 26. C. Map pages from EAA 2007303, 2 pages. D. NC0088552 Additional Information Request 20190506, 21 pages. E. Additional Information Received 20190702, email 3 pages. F. Aqua Hardness Results, 20 pages. G. 2018 NC Integrated Report, p. 1538. H. NC0088552 Monitoring Report Violations Nov2013 to Oct2018, 1 page. I. NC0088552_Inspection Report _20181106, 5 pages. J. NC0088552 001 RPA 20190705, 5 pages. K. NC0088552 002 RPA 20190705, 5 pages. L. Dissolved Metals Implementation Freshwater Memo. 4 p. M. WTP Strategy revised October 2009, page 9. N. WTP Strategy revised October 2009, page 10. O. Affidavit of Publication, Mount Airy News, 20190714, 1 p. P. Regional Office Comments, Roone Boone, 20181207, 2 pages. Q. Permittee Comments, Amanda A Berger, 20191111, 3 pages. R. Regional Office Comments, Roone Boone, 20190724, 3 pages. S. Review Checklist 2019, 2 pages. Page 10 of 10 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 Water Resources ENWRONMENTAL OUAUTY July 09, 2018 Shannon V. Becker, President Aqua North Carolina Inc 202 Mackenan Ct Cary, NC 27511 Subject: Permit Renewal Application No. NCO088552 Colonial Woods Subdivision - Wells #1 & #2 Surry County Dear Applicant: RCY COOPER Gimernar AMCHAEL S. REGAN secre&ff LRgDA CULPEPPER. Iniff n I)lrecwr The Water Quality Permitting Section acknowledges the July 6, 2018 receipt of your permit renewal application and supporting documentation. Your application will be assigned to a permit writer within the Section's NPDES WW permitting branch. Per G.S. 150B-3 your current permit does not expire until permit decision on the application is made. Continuation of the current permit is contingent on timely and sufficient application for renewal of the current permit. The permit writer will contact you if additional information is required to complete your permit renewal. Please respond in a timely manner to requests for additional information necessary to allow a complete review of the application and renewal of the permit. Information regarding the status of your renewal application can be found online using the Department of Environmental Quality's Environmental Application Tracker at: https•//deq nc gov/permits-regulations/permit-guidance/environmental-application-tracker If you have any additional questions about the permit, please contact the primary reviewer of the application using the links available within the Application Tracker. Sincerely, J(W �A� Wren Thedford Administrative Assistant Water Quality Permitting Section ec: WQPS Laserfiche File w/application(WSRO) State of North Carolina I Environmental Quality I Water Resources 1617 Mail Service Center I Raleigh, North Carolina 27699-1617 919-807-6300 1 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 June 25, 2018 Mr. Wren Thedford Compliance and Expedited Permitting Unit DWR, NCDEQ 1617 Mail Service Center Raleigh, NC 27699-1617 Re: Application for Permit Renewal Aqua North Carolina, Inc. Colonial Woods Subdivision, Well #1 - WTP NPDES Permit NC0088552 Dear Mr. Thedford: RECEIVEDIOENFU®WR JUL 0 6 2018 Water ResS Permitting ect on Enclosed are three (3) copies of the completed application Form D-WWTP. This submittal includes the necessary attachments for your office to renew the subject permit. Aqua of North Carolina, Inc. (AQUA) has also reviewed the Division of Water Resource's General Permit NCG5900000 for Greensand WTP Effluent Limitations and Monitoring Requirements - Discharging to Freshwater, and AQUA hereby request that treated discharge from Colonial Lakes Subdivision — Well #1 be considered for coverage under this General Permit. AQUA understands that if Coverage under a General Permit is granted, the Division will rescind individual NPDES Permit NC0088552. If there are any questions or concerns with our request, please do not hesitate to contact me at aaowens@aquaamerica.com or 919-653-6965. Best regards, ykv\/�" 64-- Amanda Owens Manager, Environmental Compliance cc: Laurie Ison Joseph Pearce Shannon Becker % DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 NPDES PERMIT APPLICATION - SHORT FORM C - WTP For discharges associated with water treatment plants Mail the complete application to: N. C. Department of Environment and Natural Resources Division of Water Quality / NPDES Unit 1617 Mail Service Center, Raleigh, NC 27699-1617 NPDES Permit Number INCO088552 If you are completing this form in computer use the TAB key or the up - down arrows to move from one field to the next. To check the boxes, click your mouse on top of the box. Otherwise, please print or type. 1. Contact Information: Owner Name Aqua North Carolina, Inc. Facility Name Colonial Woods Subdivision - Well # 1 WTP Mailing Address 202 Mackenan Ct City Cary RECEIVE® ®WR State / Zip Code NC/27511 JUL 0 6 2018 Telephone Number (919) 653-6965 vyater Resources Fax Number (919) 460-1788 perms tion e-mail Address aaowens@aquaamerica.com 2. Location of facility producing discharge: Check here if same as above ❑ Street Address or State Road Atkins Lane City Mt. Airy State / Zip Code NC/ 27030 County Surry 3. Operator Information: Name of the firm, consultant or other entity that operates the facility. (Note that this is not referring to the Operator in Responsible Charge or ORC) Name Aqua North Carolina, Inc. Mailing Address 4163 Sinclair Street City Denver State / Zip Code NC / 28037 Telephone Number (704)489-9404 Fax Number (704)489-9409 Page 1 of 1 Version 5/2012 � DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 NPDES PERMIT APPLICATION - SHORT FORM C - WTP For discharges associated with water treatment plants 4. Ownership Status: - - - - Federal ❑- State ❑ Private ® Public ❑ 5. Type of treatment plant: ❑ Conventional (Includes coagulation, -flocculation, and sedimentation, usually followed by filtration and disinfection) ❑ Ion Exchange (Sodium Cycle Cationic ion exchange) ® Green Sand Filter (No sodium recharge) ❑ Membrane Technology (RO, nanofiltration) Check here if the treatment process also uses a water softener ❑ 6. Description of source water(s) (i.e. groundwater, surface water) Groundwater Well 7. Describe the treatment process(es) for the raw water: Raw water is treated by greensand filters in parallel with a 0.002 MGD discharge of filter backwash wastewater. a. Well # 1 • Two (2) greensand filters operated in parallel. b. Well #2 • Five (5) Greensand filters operated in parallel. Chemical usage at both wells consisting of: • Potassium permanganate • Caustic soda • Chlorine 8. Describe the wastewater and the treatment process(es) for wastewater generated by the facility: Wastewater discharge from said treatment works at the location specified on the attached map into an unnamed tributary to Bull Creek, classified C waters in the Yadkin -Pee Dee River. 9. Number of separate discharge points: 1 Outfall Identification number(s) 001 10. Frequency of discharge: If intermittent: Days per week discharge occurs: 7 Continuous ❑ Intermittent Duration: 20 minutes Page 2 of 2 Version 5/2012 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 NPDES PERMIT APPLICATION - SHORT FORM C - WTP For discharges associated with water treatment plants 11. Plant design potable flow rate - 0.03024 MGD -- - - Backwash or reject flow 0.00100 MGD 12. Name of receiving stream(s) (Provide a map showing the exact location of each outfall, including latitude and longitude): Unnamed Tributary to Faulkner Creek (Yadkin Pee Dee -Basin) 13. Please list all water treatment additives, including cleaning chemicals or disinfection treatments, that have the potential to be discharged. Alum / aluminum sulfate Yes No lk Iron sulfate /-ferrous sulfate Yes No ki Fluoride Yes No Ammonia nitrogen / Chloramines Yes No Zinc -orthophosphate or sweetwater CP1236 Yes No t List any other additives below: Chlorine Potassium Pea Caustic Soda 14. Is this facility located on Indian country? (check one) Yes ❑ No 15. Additional Information: ➢ Provide a schematic of flow through the facility, include flow volumes at all points in the water treatment process. The plan should show the point[s] of addition for chemicals and all discharges routed to an outfall [including stormwater]. ➢ Solids Handling Plan 16. NEW Applicants Information needed in addition to items 1-15: ➢ New applicants must contact a permit coordinator with the NCDENR Customer Service Center. Was the Customer Service Center contacted? ❑ Yes ❑ No ➢ Analyses of source water collected ➢ Engineering Alternative Analysis ➢ Discharges from Ion Exchange and Reverse Osmosis plants shall be evaluated using a water quality model. 17. Applicant Certification I certify that I am familiar with the information contained in the application and that to the best of my knowledge and belief such information is true, complete, and accurate. Page 3 of 3 Version 5/2012 •. DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 NPDES PERMIT APPLICATION - SHORT FORM C - WTP For discharges associated with water treatment plants Amanda A Owens Manager, Environmental Compliance Printed name of Person Si-anina Title Signature of Applicant Date `2S-- 201 North Carolina General Statute 143-215.6 (b)(2) provides that- Any person who knowingly makes any false statement representation, or certification in any application, record, report, plan, or other document files or required to be maintained under Article 21 or regulations of the Environmental -Management Commission implementing that Article, or who falsifies, tampers with, or knowingly renders inaccurate any recording or monitoring device or method required to be operated or maintained under Article 21 or regulations of the Environmental Management Commission implementing that Article, shall be guilty of a misdemeanor punishable by a fine not to exceed $25,000, or by imprisonment not to exceed sic months, or by both. (18 U S C Section 1001 provides a punishment by a fine of not more than $25,000 or imprisonment not more than 5 years, or both, for a similar offense ) Page 4 of 4 Version 5/2012 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 Aqua North Carolina, Inc. Colonial Woods Subdivision Well #1 & #2 WTP Latitude: #136* 24' 18" N 1112 36° 24' 19" State Grid: Dobson Longitude: #180* 37' 34" W / #2 80' 37' 39" Permitted Flow Bolt 0.002 MOD Recelvina Stretun: UT to Dull Creek Stream Clash C Dainase Basin; Yadkin -Pee Dee River Basin Sub -Basin: 03-07-03 Facility it I Location not to scalp NPDES Permit No. NCO088552 North Surry County DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 AQUAs. SLUDGE MANAGEMENT PLAN For Aqua North Carolina, Inc. No sludge will be treated on any wastewater treatment plant site operated by Aqua N.C., Western Division Where practical, sludge removed from a Aqua N.C., Western Division facility will be transported via a contract hauler to another Aqua N.C., Western Division facility for the purpose of "seeding" a new or under loaded plant. Unusable (or "dead") sludge will be removed by a contract hauler and properly disposed of in accordance with NCGS 143-215.1. Contract haulers used by Aqua N.C., Western Division will be required to report the quantity of sludge transported and identify the location of the proposed disposal site if the sludge is not taken to an existing plant operated by Aqua N.C., Western Division. Aqua N.C., Western Division has not entered into any agreement to accept sludge into its facilities from plants not owned by them. Aqua N.C., Western Division will keep records on the quantity of sludge removed from each facility, the name of the contract hauler, and the destination of the sludge (whether used in another plant or disposed of). The information will be kept on file and will be made available to any regulatory agency having jurisdiction over sludge treatment or disposal. Aqua N.C., Western Division includes all of the facilities under the jurisdiction of the Winston-Salem Regional Office. 202 MacKenan Court, Cary, NC, 27511 • 919.467.8712 • AquaAmerica.com DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 Permit No. NCG590000 PART 1 A. Coverage (L) Eligibility of Coverage a. Existing Greensand Water Treatment Plants (WTPs) with individual NPDES permits and new facilities seeking a NPDES permit for a geensand water purification system utilizing Iron and/or Manganese removal systems are eligible for coverage under this general permit. Backwash wastewaters from similar activities such as sand filtration or systems utilizing calcite filtration are eligible and covered under the Greensand WTP effluent requirements section in this general permit. b. Existing Conventional WTPs with a wastewater discharge resulting from water purification facilities with filter backwash, sedimentation basin washdown, and decant from water treatment facilities are eligible for coverage under this general permit. (2.) Limitations on Coverage a. Although this general permit does not cover the following types of discharges, other permits such as an individual NPDES permit, an alternate general permit, or other approval from the Division may be obtained. This permit does not authorize discharges from Water Treatment Plants with the following: • Discharges that are mixed with other process wastewaters. • Discharges to waters classified as High Quality Waters (HQW) or Outstanding Resource Waters (ORW). • Discharges from water purification systems using Membrane Treatment (Reverse Osmosis) or Ion Exchange. • Discharges that would adversely affect a Federal or State listed endangered or threatened species or its critical habitat. • Discharges of pollutants to an impaired waterbody in excess of the wasteload allocation specified in an EPA -Approved TMDL (Total Maximum Daily Load). • Discharges from new Conventional WTPs proposing a discharge to surface waters. b. New Conventional WTPs proposing a discharge to surface waters shall be covered under an individual permit for at least one permit cycle. Upon permit renewal, if an evaluation of the facility's wastewaters shows no need for additional limitations or requirements beyond what is contained in this general permit, then the permittee will be considered for coverage. c. Conventional WTPs proposing to expand existing facilities shall submit a Notice of Intent (NOI) permit application with the proposed expansion/treatment details and an Engineering Alternative Analysis for Division review and approval in order to obtain coverage for the expansion under this permit and receive a revised Certificate of Coverage (CoC). d. This permit does not authorize discharges that the Division has determined to be or which may reasonably be expected to be contributing to a violation of a water quality standard (as defined in the "Red Book" or NC Administrative Code 15A NCAC 02B .0100, .0200, and .0300). e. If the Division determines at any time that the discharge is causing or contributing to a violation of water quality standards or if the Division has any other grounds for modifying or revoking this permit, the Division may require corrective action or require the discharge be permitted differently in accordance with Part II, Section B of this permit. The Division may deny coverage under this permit and require submittal of an application for an individual NPDES permit based on a review of the Notice of Intent (NOI) or other information. f. Whole Effluent Toxicity (WET) test results for the past three years shall be reviewed for existing or expanding Conventional WTPs applying for coverage under this general permit. Permittees with WET test results showing potential for aquatic toxicity may be denied coverage under this general permit which includes a WET limitation of "Pass". (3.) Transfer Coverage from Other Permits Upon issuance of this general permit, all existing and active individual permits for Greensand and Conventional type WTPs will automatically be considered for coverage under this general permit as permit renewal applications are received. Page 2 of 26 ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 1:129000 Dobson 7.5-minute Quadrangle Colonial Woods Subdivision - Well # 1 USGS Map Scale: 1:12,000 Exist Discharge Longitude: 80.6247669 W Latitude: 36.4110914 N 5 North Horizon En-gineerinq & Consultinq, Inc. 2510 Walker Road Mt. Pleasant, N.C. 28124 March 3, 2007 6D.cuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 I 1:69000 Dobson 7.5-minute Quadrangle Colonial Woods Subdivision - Well # 2 USGS Map Longitude Latitude: sry { Index map -80.6287161 W 36.4110797 N MEN O North Horizon Engineering & Consulting, Inc. 2510 Walker Road Mt. Pleasant, N.C. 28124 March 3, 2007 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 ROY COOPER Governor MICHAEL S. REGAN Secretary LINDA CULPEPPER Director NORTH CAROLINA Environmental Quality May 6, 2019 CERTIFIED MAIL 7016 2140 0000 4371 1179 RETURN RECEIPT REQUESTED Mr. Shannon V. Becker, President c/o Amanda Berger Aqua North Carolina, Inc. 202 Mackenan Court Cary, North Carolina 27511 Subject: Request for Additional Information Renewal Application Colonial Woods Subdivision — Wells #1 & #2 WTP NPDES permit NCO088552 Surry County Dear Mr. Becker: The Division has reviewed your application, received on July 6, 2018, for renewal of NPDES permit NC0088552. To enable us complete our review in accordance with N.C.G.S. 143-215.1 and 15A NCAC 2H.0105, please provide additional or revised information to address the following comments: 1. Please provide five (5) days of Total Hardness (CaCO3 or (Ca + Mg)) data for the effluent at Outfalls 001 and 002. Please note the attached data reporting errors form May2014 to October 2018 for permit NCO088552 and others. The data for Zinc is of most importance for this additional information request. Many errors involved reporting the incorrect unit of measure (UoM) such as mg/L verses µg/L. Another error noted was reporting a value of zero (0) for "no detection" for Total Residual Chorine (TRC) results instead of reporting the method practical quantitation limit (PQL) such as < 20 µg/L. If these are indeed errors, please correct DMRs accordingly. Please note you may want to review and correct DMRs since October 2018 as well. The NC 2007-2014 Water Quality Standard (WQS) Triennial Review was approved by the NC Environmental Management Committee (EMC) on November 13, 2014. The US EPA subsequently approved the WQS revisions on April 6, 2016 with some exceptions. The NC Division of Water Resources is required to implement the new dissolved metal standards in all permits public noticed after Apri16, 2016. The new standards for most metals include acute standards. Furthermore, the freshwater standards for several metals are expressed as the dissolved form of the metals, and seven metals have hardness - dependent equations. As a result, the Division will need site -specific effluent hardness data and instream hardness data, upstream of the discharge, for each facility monitoring these metals in order to calculate permit limitations. The metal of concern for this permit renewal is Zinc. To evaluate dissolved Zinc, a Reasonable Potential Analysis (RPA) was conducted using data from DMRs (May2014—Oct2018) [see attached RPA spreadsheets for Outfalls 001 & 002]. Results indicated a reasonable potential to exceed the new dissolved metals standard for Zinc. Consequently, the following D EQ �� North Carolina Department of Environmental Quality Division of Water Resources 512 North Salisbury Street 1 1617 Mail Service Center I Raleigh, North Carolina 27699-1617 NORTH CAROLINA oePenmamorenmonmameiaueiz /� 919.707.9000 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 lYL. LVV11Vl May 6, 2019 Page 2 of 2 daily maximum limits (acute standard) and monthly average limits (in this case the acute standard) for Total Zinc could be applied for this permit renewal: Parameter Outfall Monthly Average Limit Daily Maximum Limit Zinc 001 No Limit No Limit Zinc 002 125.7 µg/L 125.7 µg/L Please note that the hardness -dependent water quality standard for zinc typically results in a more stringent permit limit for the acute total allowable metal verses the chronic value. In this situation, we use the acute total allowable metal concentration (permit limit) as the limitation for both the Daily Maximum and the Monthly Average. To calculate these limits a default hardness of 25 mg/L was entered for both the effluent and upstream values. Since this facility discharges under zero flow conditions a value of 0 was entered for all stream flow data for both Oufalls 001 & 002. Please note that under zero flow conditions the default value of 25 mg/L will be using for the upstream Total Hardness. Additionally, the maximum monthly average flows of 0.001 MGD for Outfall 001 and 0.001239 MGD for Outfall 002 from November 2015 to October 2018 (3 years) data was used as the effluent flow. For a summary of this information, please see the attached "Dissolved to Total Metal Calculator". If no response is received within 60 calendar days [per 15A NCAC 2H.0107(b)], the permit will be renewed without the benefit of the requested additional information. Therefore, a default effluent hardness of 25 mg/L will be used to calculate effluent limits for Zinc as indicated above. Please submit the additional information requested by one of the following: Electronically: derek.denard@ncdenr.gov Address For LISPS: Attention: Derek Denard Division of Water Resources WQ Permitting Section — NPDES 1617 Mail Service Center Raleigh, NC 27699-1617 Physical Address For parcel packages: Attention: Wren Tredford Division of Water Resources WQ Permitting Section — NPDES 512 N. Salisbury Street (9th Floor -Archdale Bldg) Raleigh, NC 27604 If you have any questions, please contact Derek Denard at 919-807-6307 or email at derekdenardkncdenr.gov. Sincerely, Derek Denard, Environmental Specialist Compliance & Expedited Permitting Unit Division of Water Resources, NCDEQ hc: Central Files ec: Laserfiche DWR/WSRO, Gary Hudson [gary.hudson@ncdenr.gov] Amanda Berger [aaowensgaaquaamerica.com] DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators MAXIMUM DATA POINTS = 58 REQUIRED DATA ENTRY Table 1. Project Information ❑CHECK IF HQW OR ORW WQS Facility Name Colonial Woods Subdivision -Well #1 WWTP/WTP Class PCNC NPDES Permit NCO088552 Outfall 001 Flow, Qw (MGD) 0.001 Receiving Stream UT to Bull Creek HUC Number 030401010903 Stream Class C ❑Apply WS Hardness WQC 7Q10s (cfs) 0.00 0.00 7Q10w (cfs) 0.00 30Q2 (cfs) QA (cfs) 0.00 1Q10s (cfs) 0.00 JL Effluent Hardness 25 mg/L (Avg) Upstream Hardness 25 mg/L (Avg) Combined Hardness Chronic 25 mg/L Combined Hardness Acute 25 mg/L Date includeds: BIMS Data'0 014 to Oct2018, flow data Nov2015 to Oct2018; default hardness. For 02/22/2017 & 05/09/2017 Zn data (in red) the UoM was reported as ug/I; therefore, it is assumed that the permittee intended to report mg/I. Data Source(s) ❑CHECK TO APPLY MODEL With exclusion of this date (by error: number must be >0.1 ug/I),the max pred Cw the is 114.6 ug/I (no RP). Follow directions for data entry. In some cases a comment menu list the available choices or a dropdown menu will provide a list you may select from. Error message occur if data entry does not meet input criteria. Par01 Par02 Par03 Par04 Par05 Par06E Par07 Par08 Par09 Par10 Par11 Par12 Par13 Par14 Par15 Par16 Par17 Par18 Par19 Par20 Par21 Par22 Par23 Par24 Par25 Table 2. Parameters of Concern Name wQs Type Chronic Modifier Acute PCL Units Arsenic Aquactic Life C 150 FW 340 5 ug/L Arsenic Human Health Water Supply C 10 HH/WS N/A 5 ug/L Beryllium Aquatic Life NC 6.5 FW 65 ug/L Cadmium Aquatic Life NC 0.5899 FW 3.2396 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 117.7325 FW 905.0818 ug/L Chromium VI Aquatic Life NC 11 FW 16 pg/L Chromium, Total Aquatic Life NC N/A FW N/A 5 pg/L Copper Aquatic Life NC 7.8806 FW 10.4720 5 ug/L Cyanide Aquatic Life NC 5 FW 22 10 ug/L Fluoride Aquatic Life NCI 1,800 FW ug/L Lead Aquatic Life NC 2.9416 FW 75.4871 ug/L Mercury Aquatic Life NC 12 FW 0.5 ng/L Molybdenum Human Health NC 2000 HH ug/L Nickel Aquatic Life NC 37.2313 FW 335.2087 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 0.2964 ug/L Zinc Aquatic Life NC 126.7335 FW 125.7052 10 ug/L NCO088552 001 RPA 2019, input 5/6/2019 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 REASONABLE POTENTIAL ANALYSIS H1 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 Results Date Data BDL=1/2DL Results 1 25 25 Std Dev. N/A 1 25 25 Std Dev. N/A 2 Mean 25.0000 2 Mean 25.0000 3 C.V. 0.0000 3 C.V. 0.0000 4 n 1 4 n 1 5 10th Per value 25.00 mg/L 5 10th Per value 25.00 mg/L 6 Average Value 25.00 mg/L 6 Average Value 25.00 mg/L 7 Max. Value 25.00 mg/L 7 Max. Value 25.00 mg/L 8 8 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 NCO088552 001 RPA 2019, data 2- 5/6/2019 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 REASONABLE POTENTIAL ANALYSIS Par21 Use "PASTE SPECIAL Zinc Values" then "COPY" . Maximum data points = 58 Date Data BDL=1/2DL Results 1 9/22/2014 14 14 Std Dev. 19.3060 2 10/8/2014 < 10 5 Mean 22.7059 3 2/24/2015 < 10 5 C.V. 0.8503 4 6/2/2015 23 23 n 17 5 9/29/2015 34 34 6 10/27/2015 44 44 Mult Factor = 1.62 7 2/24/2016 30 30 Max. Value 67.0 ug/L 8 5/24/2016 28 28 Max. Pred Cw 108.5 ug/L 9 8/9/2016 35 35 10 11/15/2016 23 23 11 2/22/2017 53 53 12 5/9/2017 < 10 5 13 8/22/2017 < 10 5 14 11/21/2017 < 10 5 15 1/9/2018 67 67 16 4/17/2018 < 10 5 17 10/9/2018 < 10 5 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 NCO088552 001 RPA 2019, data 3 - 5/6/2019 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 Colonial Woods Subdivision -Well #1 NCO088552 Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators MAXIMUM DATA POINTS = 58 Ow (MGD) = 0.00 WWTP/WTP Class: PCNC 1Q10S (cfs) = 0.00 1WC% 1Q10S = 100 7Q10S (cfs) = 0.00 1WC% 7Q10S = 100 7Q10W (cfs) = 0.00 1WC% 7Q10W = 100 30Q2 (cfs) = 0.00 1WC% (&, 30Q2 = 100 Avg. Stream Flow, QA (cfs) = 0.00 fW%C (& QA = 100 Receiving Stream: UT to Bull Creek HUC 030401010903 Stream Class: C Outfall 001 Qw = 0.001 MGD COMBINED HARDNESS (ma/L) Acute = 25 mg/L Chronic = 25 mg/L PARAMETER TYPE (�) NC STANDARDS OR EPA CRITERIA a y F D REASONABLE POTENTIAL RESULTS RECOMMENDED ACTION Chronic AcuteApplied n # Det. Max Pred Cw Allowable Cw Standard Acute: 125.7 No RP, Predicted Max < 50% of Allowable Cw - No Zinc NC 126.7335 FW 125.7052 10 ug/L 17 10 108.5 Monitoring required Chronic 126.7 No RP, Predicted Max < 50 % of Allowable Cw - No No value > Allowable Cw Monitoring required NCO088552 001 RPA 2019, rpa Page 4 of 5 5/6/2019 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 Date: 5/6/2019 FACILITY: Colonial Woods Subdivision -Well #1 Outfall 001 NPDES PERMIT: NC0088552 Dissolved to Total Metal Calculator In accordance with Federal Regulations, permit limitations must be written as Total Metals per 40 CFR 122.45(c) Receiving Receiving Rec. Stream NPDES Total Suspended Combined Combined nstream Instream Effluent Stream Stream Solids Hardness Hardness Wastewater Wastewater Upstream Hardness summer summer7Q10 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) 0.0000 1 0.0000 0.0000 0.0010 10 25.000 25.000 100.0000 100.0000 25 25 Upstream Hard Avg (mg/L) = 25 EFF Hard Avg (mg/L) = 25 ENTS (identify parameters to PERCS Branch to maintain in facility's LTMP/STMP): PARAMETER Dissolved Metals Translators- using Default Partition Coefficients (streams) (MAEC) as a Total Metal =Dissolved Metal Translator Chronic Acute Chronic Acute u u /I u /I rug/I] Cadmium (d) 0.15 0.82 0.252 0.59 3.24 Cd -Trout streams 0.15 0.51 0.252 0.59 2.01 Chromium III (d)(h) 24 183 0202. 117.73 905.08 Chromium VI (d) 11 16 1.000 11.00 16.00 Chromium, Total (t) N/A N/A Copper (d)(h) 2.7 3.6 0.348 7.88 10.47 Lead (d)(h) 0.54 14 0.184 2.94 75.49 Nickel (d)(h) 16 145 0.432 37.23 335.21 Ni - WS streams (t) 5 N/A Silver(d)(h,acute) 0.06 0.301 1.000 0.06 0.30 Zinc (d)(h) 36 361 0.288 126.73 125.71 Beryllium 1 6.51 1.0001 6.51 65 Arsenic (d) 1501 1 1 1.0001 0 1501 0 340 (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. DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators MAXIMUM DATA POINTS = 58 REQUIRED DATA ENTRY Table 1. Project Information ❑CHECK IF HQW OR ORW WQS Facility Name Colonial Woods Subdivision - Well #2 WWTP/WTP Class PCNC NPDES Permit NCO088552 Outfall 002 Flow, Qw (MGD) 0.001 Receiving Stream UT to Bull Creek HUC Number 030401010903 Stream Class C ❑Apply WS Hardness WQC 7Q10s (cfs) 0.00 0.00 7Q10w (cfs) 30Q2 (cfs) 0.00 0.00 QA (cfs) 0.00 1Q10s (cfs) Effluent Hardness 25 mg/L (Avg) Upstream Hardness 25 mg/L (Avg) -------------------- Combined Hardness Chronic 25 mg/L Combined Hardness Acute 25 mg/L BIMS Data May2014 to Oct2018; flow data Nov2015 to Oct2018; default hardness Data Source(s) ❑CHECK TO APPLY MODEL Follow directions for data entry. In some cases a comment menu list the available choices or a dropdown menu will provide a list you may select from. Error message occur if data entry does not meet input criteria. Par01 Par02 Par03 Par04 Par05 Par06E Par07 Par08 Par09 Par10 Par11 Par12 Par13 Par14 Par15 Par16 Par17 Par18 Par19 Par20 Par21 Par22 Par23 Par24 Par25 Table 2. Parameters of Concern Name wQs Type Chronic Modifier Acute PCL Units Arsenic Aquactic Life C 150 FW 340 5 ug/L Arsenic Human Health Water Supply C 10 HH/WS N/A 5 ug/L Beryllium Aquatic Life NC 6.5 FW 65 ug/L Cadmium Aquatic Life NC 0.5899 FW 3.2396 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 117.7325 FW 905.0818 ug/L Chromium VI Aquatic Life NC 11 FW 16 pg/L Chromium, Total Aquatic Life NC N/A FW N/A 5 pg/L Copper Aquatic Life NC 7.8806 FW 10.4720 5 ug/L Cyanide Aquatic Life NC 5 FW 22 10 ug/L Fluoride Aquatic Life NCI 1,800 FW ug/L Lead Aquatic Life NC 2.9416 FW 75.4871 ug/L Mercury Aquatic Life NC 12 FW 0.5 ng/L Molybdenum Human Health NC 2000 HH ug/L Nickel Aquatic Life NC 37.2313 FW 335.2087 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 0.2964 ug/L Zinc Aquatic Life NC 126.7335 FW 125.7052 10 ug/L NCO088552 002 RPA 2019, input 5/6/2019 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 REASONABLE POTENTIAL ANALYSIS H1 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 Results Date Data BDL=1/2DL Results 1 25 25 Std Dev. N/A 1 25 25 Std Dev. N/A 2 Mean 25.0000 2 Mean 25.0000 3 C.V. 0.0000 3 C.V. 0.0000 4 n 1 4 n 1 5 10th Per value 25.00 mg/L 5 10th Per value 25.00 mg/L 6 Average Value 25.00 mg/L 6 Average Value 25.00 mg/L 7 Max. Value 25.00 mg/L 7 Max. Value 25.00 mg/L 8 8 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 NCO088552 002 RPA 2019, data 2- 5/6/2019 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 REASONABLE POTENTIAL ANALYSIS Par21 Use "PASTE SPECIAL Zinc Values" then "COPY" . Maximum data points = 58 Date Data BDL=1/2DL Results 1 9/29/2015 67 67 Std Dev. 35.3305 2 10/27/2015 44 44 Mean 43.3333 3 2/24/2016 87 87 C.V. 0.8153 4 5/24/2016 101 101 n 12 5 8/9/2016 91 91 6 2/22/2017 35 35 Mult Factor = 1.87 7 5/9/2017 30 30 Max. Value 101.0 ug/L 8 8/22/2017 12 12 Max. Pred Cw 188.9 ug/L 9 11/21/2017 < 10 5 10 1/9/2018 38 38 11 4/17/2018 < 10 5 12 10/9/2018 < 10 5 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 NCO088552 002 RPA 2019, data 3 - 5/6/2019 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 Colonial Woods Subdivision - Well #2 NCO088552 Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators MAXIMUM DATA POINTS = 58 Ow (MGD) = 0.00 WWTP/WTP Class: PCNC 1Q10S (cfs) = 0.00 1WC% 1Q10S = 100 7Q10S (cfs) = 0.00 1WC% 7Q10S = 100 7Q10W (cfs) = 0.00 1WC% 7Q10W = 100 30Q2 (cfs) = 0.00 1WC% (&, 30Q2 = 100 Avg. Stream Flow, QA (cfs) = 0.00 fW%C (& QA = 100 Receiving Stream: UT to Bull Creek HUC 030401010903 Stream Class: C Outfall 002 Qw = 0.001239 MGD COMBINED HARDNESS (ma/L) Acute = 25 mg/L Chronic = 25 mg/L PARAMETER TYPE h) NC STANDARDS OR EPA CRITERIA a y F D REASONABLE POTENTIAL RESULTS RECOMMENDED ACTION Chronic AcuteApplied n # Det. Max Pred Cw Allowable Cw Standard Acute: 125.7 RP shown - apply Monthly Monitoring with Limit Zinc NC 126.7335 FW 125.7052 10 ug L 12 9 188.9 _ _ _ _ --Ch---- - ronic—126.7 --------------------------- RP shown - apply Monthly Monitoring with Limit No value > Allowable Cw NCO088552 002 RPA 2019, rpa Page 4 of 5 5/6/2019 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 Date: 5/6/2019 FACILITY: Colonial Woods Subdivision - Well #2 Outfall 002 NPDES PERMIT: NC0088552 Dissolved to Total Metal Calculator In accordance with Federal Regulations, permit limitations must be written as Total Metals per 40 CFR 122.45(c) Receiving Receiving Rec. Stream NPDES Total Suspended Combined Combined nstream Instream Effluent Stream Stream Solids Hardness Hardness Wastewater Wastewater Upstream Hardness summer summer7Q10 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) 0.0000 1 0.0000 0.0000 0.0012 10 25.000 25.000 100.0000 100.0000 25 25 Upstream Hard Avg (mg/L) = 25 EFF Hard Avg (mg/L) = 25 ENTS (identify parameters to PERCS Branch to maintain in facility's LTMP/STMP): PARAMETER Dissolved Metals Translators- using Default Partition Coefficients (streams) (MAEC) as a Total Metal =Dissolved Metal Translator Chronic Acute Chronic Acute u u /I u /I rug/I] Cadmium (d) 0.15 0.82 0.252 0.59 3.24 Cd -Trout streams 0.15 0.51 0.252 0.59 2.01 Chromium III (d)(h) 24 183 0202. 117.73 905.08 Chromium VI (d) 11 16 1.000 11.00 16.00 Chromium, Total (t) N/A N/A Copper (d)(h) 2.7 3.6 0.348 7.88 10.47 Lead (d)(h) 0.54 14 0.184 2.94 75.49 Nickel (d)(h) 16 145 0.432 37.23 335.21 Ni - WS streams (t) 5 N/A Silver(d)(h,acute) 0.06 0.301 1.000 0.06 0.30 Zinc (d)(h) 36 361 0.288 126.73 125.71 Beryllium 1 6.51 1.0001 6.51 65 Arsenic (d) 1501 1 1 1.0001 0 1501 0 340 (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. DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 A C F G H I K N O P T I U 1 Permit Facility Outfall Month Day Year Parameter UoM Value Modifier Comments NCO088498 Aqua North Carolina Inc - Mitchell Bluff 001 6 2 2015 01045 - Iron, Total (as Fe) ug/I 2.66 UoM mg/L? 2 Subdivision Well #1 NCO088498 Aqua North Carolina Inc - Mitchell Bluff 001 6 2 2015 01055 - Manganese, Total (as Mn) ug/I 0.238 UoM mg/L? 3 Subdivision Well #1 NCO088498 Aqua North Carolina Inc - Mitchell Bluff 001 10 27 2015 50060 - Chlorine, Total Residual ug/I 0 PQL? 4 Subdivision Well #1 NCO088498 Aqua North Carolina Inc - Mitchell Bluff 001 8 9 2016 01045 - Iron, Total (as Fe) ug/I 3.07 UoM mg/L? 5 Subdivision Well #1 NCO088498 Aqua North Carolina Inc - Mitchell Bluff 001 8 9 2016 01055 - Manganese, Total (as Mn) ug/I 0.23 UoM mg/L? 6 Subdivision Well #1 NCO088498 Aqua North Carolina Inc - Mitchell Bluff 001 8 9 2016 50050 - Flow, in conduit orthru mgd 0.0072 decimal place? 7 Subdivision Well #1 treatment plant NCO088498 Aqua North Carolina Inc - Mitchell Bluff 001 8 23 2016 50050 - Flow, in conduit orthru mgd 0.0072 decimal place? 8 Subdivision Well #1 treatment plant NCO088498 Aqua North Carolina Inc - Mitchell Bluff 001 10 1 2016 50050 - Flow, in conduit orthru mgd 0.0072 decimal place? 9 Subdivision Well #1 treatment plant NCO088498 Aqua North Carolina Inc - Mitchell Bluff 001 10 4 2016 50050 - Flow, in conduit orthru mgd 0.0072 decimal place? 10 Subdivision Well #1 treatment plant NCO088498 Aqua North Carolina Inc - Mitchell Bluff 001 10 10 2016 50050 - Flow, in conduit orthru mgd 0.0072 decimal place? 11 Subdivision Well #1 treatment plant NCO088498 Aqua North Carolina Inc - Mitchell Bluff 001 10 18 2016 50050 - Flow, in conduit orthru mgd 0.0072 decimal place? 12 Subdivision Well #1 treatment plant NCO088498 Aqua North Carolina Inc - Mitchell Bluff 001 10 24 2016 50050 - Flow, in conduit orthru mgd 0.0072 decimal place? 13 Subdivision Well #1 treatment plant NCO088498 Aqua North Carolina Inc - Mitchell Bluff 001 10 31 2016 50050 - Flow, in conduit orthru mgd 0.0072 decimal place? 14 Subdivision Well #1 treatment plant NCO088498 Aqua North Carolina Inc - Mitchell Bluff 001 11 15 2016 01045 - Iron, Total (as Fe) ug/I 4.53 UoM mg/L? 151 Subdivision Well #1 NCO088498 Aqua North Carolina Inc - Mitchell Bluff 001 11 15 2016 01055 - Manganese, Total (as Mn) ug/I 0.192 UoM mg/L? 16 Subdivision Well #1 NCO088498 Aqua North Carolina Inc - Mitchell Bluff 001 12 6 2016 50050 - Flow, in conduit orthru mgd 0.0072 decimal place? 17 Subdivision Well #1 treatment plant NCO088498 Aqua North Carolina Inc - Mitchell Bluff 001 12 20 2016 50050 - Flow, in conduit orthru mgd 0.0072 decimal place? 18 Subdivision Well #1 treatment plant NCO088498 Aqua North Carolina Inc - Mitchell Bluff 001 2 22 2017 01045 - Iron, Total (as Fe) ug/I 0.472 UoM mg/L? 19 Subdivision Well #1 NCO088498 Aqua North Carolina Inc - Mitchell Bluff 001 2 22 2017 01055 - Manganese, Total (as Mn) ug/I 0.071 UoM mg/L? 20 Subdivision Well #1 NCO088498 Aqua North Carolina Inc - Mitchell Bluff 001 5 10 2017 01045 - Iron, Total (as Fe) ug/I 0.687 UoM mg/L? 21 1 ISubdivision Well #1 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 A C F G H I K N O P T I U 1 Permit Facility Outfall Month Day Year Parameter UoM Value Modifier Comments NCO088498 Aqua North Carolina Inc - Mitchell Bluff 001 5 10 2017 01055 - Manganese, Total (as Mn) ug/I 0.118 UoM mg/L? 22 Subdivision Well #1 NCO088501 Aqua North Carolina Inc - Stonington 001 6 3 2014 01034 - Chromium, Total (as Cr) ug/I 0.005 LESSTHAN UoM mg/L? 23 Subdivision - Well #1 NCO088501 Aqua North Carolina Inc - Stonington 001 8 6 2014 01002 - Arsenic, Total (as As) ug/I 0.005 LESSTHAN UoM mg/L? 24 Subdivision - Well #1 NCO088501 Aqua North Carolina Inc - Stonington 001 3 4 2015 50060 - Chlorine, Total Residual ug/I 0 PQL? 25 Subdivision - Well #1 NCO088501 Aqua North Carolina Inc - Stonington 001 5 6 2015 01055 - Manganese, Total (as Mn) ug/I 0.057 UoM mg/L? 26 Subdivision - Well #1 NCO088501 Aqua North Carolina Inc - Stonington 001 9 2 2015 01055 - Manganese, Total (as Mn) ug/I 0.03 UoM mg/L? 27 Subdivision - Well #1 NCO088501 Aqua North Carolina Inc - Stonington 001 10 7 2015 01055 - Manganese, Total (as Mn) ug/I 0.039 UoM mg/L? 28 Subdivision - Well #1 NCO088501 Aqua North Carolina Inc - Stonington 001 12 2 2015 01055 - Manganese, Total (as Mn) ug/I 0.005 LESSTHAN UoM mg/L? 29 Subdivision - Well #1 NCO088501 Aqua North Carolina Inc - Stonington 001 8 3 2016 01055 - Manganese, Total (as Mn) ug/I 0.01 UoM mg/L? 30 Subdivision - Well #1 NCO088501 Aqua North Carolina Inc - Stonington 001 9 7 2016 01055 - Manganese, Total (as Mn) ug/I 0.056 UoM mg/L? 31 Subdivision - Well #1 NCO088501 Aqua North Carolina Inc - Stonington 001 10 5 2016 01055 - Manganese, Total (as Mn) ug/I 0.045 UoM mg/L? 32 Subdivision - Well #1 NCO088501 Aqua North Carolina Inc - Stonington 001 11 2 2016 01055 - Manganese, Total (as Mn) ug/I 0.044 UoM mg/L? 33 Subdivision - Well #1 NCO088501 Aqua North Carolina Inc - Stonington 001 12 7 2016 01055 - Manganese, Total (as Mn) ug/I 0.01 UoM mg/L? 34 Subdivision - Well #1 NCO088501 Aqua North Carolina Inc - Stonington 001 1 4 2017 01055 - Manganese, Total (as Mn) ug/I 0.043 UoM mg/L? 35 Subdivision - Well #1 NCO088501 Aqua North Carolina Inc - Stonington 001 2 1 2017 01045 - Iron, Total (as Fe) ug/I 0.081 UoM mg/L? 361 Subdivision - Well #1 NCO088501 Aqua North Carolina Inc - Stonington 001 2 1 2017 01055 - Manganese, Total (as Mn) ug/I 0.076 UoM mg/L? 37 Subdivision - Well #1 NCO088501 Aqua North Carolina Inc - Stonington 001 4 5 2017 01045 - Iron, Total (as Fe) ug/I 0.243 UoM mg/L? 38 Subdivision - Well #1 NCO088501 Aqua North Carolina Inc - Stonington 001 4 5 2017 50050 - Flow, in conduit orthru mgd 420 UoM gpd? 39 Subdivision - Well #1 treatment plant NCO088501 Aqua North Carolina Inc - Stonington 001 4 13 2017 50050 - Flow, in conduit orthru mgd 500 UoM gpd? 40 Subdivision - Well #1 treatment plant NCO088501 Aqua North Carolina Inc - Stonington 001 4 19 2017 50050 - Flow, in conduit orthru mgd 483 UoM gpd? 41 Subdivision - Well #1 treatment plant DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 A C F G H I K N O P T U 1 Permit Facility Outfall Month Day Year Parameter UoM Value Modifier Comments NCO088501 Aqua North Carolina Inc - Stonington 001 4 26 2017 50050 - Flow, in conduit orthru mgd 543 UoM gpd? 42 Subdivision - Well #1 treatment plant NCO088501 Aqua North Carolina Inc - Stonington 001 7 5 2018 01055 - Manganese, Total (as Mn) ug/I 0.005 LESSTHAN UoM mg/L? 43 Subdivision - Well #1 NCO088528 Aqua North Carolina Inc - Hillcrest 001 5 27 2015 50060 - Chlorine, Total Residual ug/I 0 PQL? 44 Subdivision- Well #3 NCO088528 Aqua North Carolina Inc - Hillcrest 001 4 12 2016 50060 - Chlorine, Total Residual ug/I 0 PQL? 45 Subdivision- Well #3 NCO088528 Aqua North Carolina Inc - Hillcrest 001 8 9 2016 01045 - Iron, Total (as Fe) ug/I 0.13 UoM mg/I? 46 Subdivision- Well #3 NCO088528 Aqua North Carolina Inc - Hillcrest 001 8 9 2016 01055 - Manganese, Total (as Mn) ug/I 0.08 UoM mg/I? 47 Subdivision- Well #3 NCO088528 Aqua North Carolina Inc - Hillcrest 001 9 13 2016 01055 - Manganese, Total (as Mn) ug/I 1.5 UoM mg/I? 48 Subdivision- Well #3 NCO088528 Aqua North Carolina Inc - Hillcrest 001 9 28 2016 01055 - Manganese, Total (as Mn) ug/I 3.1 UoM mg/I? 49 Subdivision- Well #3 NCO088528 Aqua North Carolina Inc - Hillcrest 001 11 15 2016 01055 - Manganese, Total (as Mn) ug/I 0.078 UoM mg/I? 50 Subdivision- Well #3 NCO088528 Aqua North Carolina Inc - Hillcrest 001 2 22 2017 01045 - Iron, Total (as Fe) ug/I 0.117 UoM mg/I? 51 Subdivision- Well #3 NCO088528 Aqua North Carolina Inc - Hillcrest 001 2 22 2017 01055 - Manganese, Total (as Mn) ug/I 0.037 UoM mg/I? 52 Subdivision- Well #3 NCO088528 Aqua North Carolina Inc - Hillcrest 001 5 9 2017 01045 - Iron, Total (as Fe) ug/I 0.093 UoM mg/I? 53 Subdivision- Well #3 NCO088528 Aqua North Carolina Inc - Hillcrest 001 5 9 2017 01055 - Manganese, Total (as Mn) ug/I 0.044 UoM mg/I? 54 Subdivision- Well #3 NCO088536 Aqua North Carolina Inc - Bannertown Hills 001 1 5 2016 50060 - Chlorine, Total Residual ug/I 0 PQL? 55 Subdivision - Well #2 NCO088536 Aqua North Carolina Inc - Bannertown Hills 001 6 7 2016 50060 - Chlorine, Total Residual ug/I 0 PQL? 56 Subdivision - Well #2 NCO088536 Aqua North Carolina Inc - Bannertown Hills 001 7 26 2016 50060 - Chlorine, Total Residual ug/I 0 PQL? 57 Subdivision - Well #2 NCO088536 Aqua North Carolina Inc - Bannertown Hills 001 8 9 2016 01045 - Iron, Total (as Fe) ug/I 0.75 UoM mg/L? 58 Subdivision - Well #2 NCO088536 Aqua North Carolina Inc - Bannertown Hills 001 8 9 2016 01055 - Manganese, Total (as Mn) ug/I 0.09 UoM mg/L? 59 Subdivision - Well #2 NCO088536 Aqua North Carolina Inc - Bannertown Hills 001 11 15 2016 01055 - Manganese, Total (as Mn) ug/I 0.114 UoM mg/L? 60 Subdivision - Well #2 NCO088536 Aqua North Carolina Inc - Bannertown Hills 001 1 11 2017 50060 - Chlorine, Total Residual ug/I 0 PQL? 61 ISubdivision - Well #2 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 A C F G H I K N O P T I U 1 Permit Facility Outfall Month Day Year Parameter UoM Value Modifier Comments NCO088536 Aqua North Carolina Inc - Bannertown Hills 001 2 22 2017 01045 - Iron, Total (as Fe) ug/I 0.46 UoM mg/L? 62 Subdivision - Well #2 NCO088536 Aqua North Carolina Inc - Bannertown Hills 001 2 22 2017 01055 - Manganese, Total (as Mn) ug/I 0.081 UoM mg/L? 63 Subdivision - Well #2 NCO088536 Aqua North Carolina Inc - Bannertown Hills 001 5 9 2017 01055 - Manganese, Total (as Mn) ug/I 0.45 UoM mg/L? 64 Subdivision - Well #2 NCO088552 Aqua North Carolina Inc - Colonial Woods 001 2 24 2015 01055 - Manganese, Total (as Mn) ug/I 0.0116 UoM mg/L? 65 Subdivision - Wells #1 & #2 NCO088552 Aqua North Carolina Inc - Colonial Woods 001 6 16 2015 50060 - Chlorine, Total Residual ug/I 0 PQL? 66 Subdivision - Wells #1 & #2 NCO088552 Aqua North Carolina Inc - Colonial Woods 001 6 28 2016 50060 - Chlorine, Total Residual ug/I 0 PQL? 67 Subdivision - Wells #1 & #2 NCO088552 Aqua North Carolina Inc - Colonial Woods 002 6 28 2016 50060 - Chlorine, Total Residual ug/I 0 PQL? 68 Subdivision - Wells #1 & #2 NCO088552 Aqua North Carolina Inc - Colonial Woods 001 8 9 2016 01055 - Manganese, Total (as Mn) ug/I 0.019 UoM mg/L? 69 Subdivision - Wells #1 & #2 NCO088552 Aqua North Carolina Inc - Colonial Woods 001 11 15 2016 01055 - Manganese, Total (as Mn) ug/I 0.028 UoM mg/L? 70 Subdivision - Wells #1 & #2 NCO088552 Aqua North Carolina Inc - Colonial Woods 002 11 15 2016 01055 - Manganese, Total (as Mn) ug/I 1.22 UoM mg/L? 71 Subdivision - Wells #1 & #2 NCO088552 Aqua North Carolina Inc - Colonial Woods 002 12 6 2016 50060 - Chlorine, Total Residual ug/I 0 PQL? 72 Subdivision - Wells #1 & #2 NCO088552 Aqua North Carolina Inc - Colonial Woods 001 2 22 2017 01045 - Iron, Total (as Fe) ug/I 0.048 UoM mg/L? 73 Subdivision - Wells #1 & #2 NCO088552 Aqua North Carolina Inc - Colonial Woods 001 2 22 2017 01055 - Manganese, Total (as Mn) ug/I 0.03 UoM mg/L? 74 Subdivision - Wells #1 & #2 NCO088552 Aqua North Carolina Inc - Colonial Woods 001 2 22 2017 01092 - Zinc, Total (as Zn) ug/I 0.053 UoM mg/L? 75 Subdivision - Wells #1 & #2 NCO088552 Aqua North Carolina Inc - Colonial Woods 002 2 22 2017 01045 - Iron, Total (as Fe) ug/I 0.556 UoM mg/L? 76 Subdivision - Wells #1 & #2 NCO088552 Aqua North Carolina Inc - Colonial Woods 002 2 22 2017 01055 - Manganese, Total (as Mn) ug/I 1.13 UoM mg/L? 77 Subdivision - Wells #1 & #2 NCO088552 Aqua North Carolina Inc - Colonial Woods 002 2 22 2017 01092 - Zinc, Total (as Zn) ug/I 0.035 UoM mg/L? 78 Subdivision - Wells #1 & #2 NCO088552 Aqua North Carolina Inc - Colonial Woods 001 5 9 2017 01045 - Iron, Total (as Fe) ug/I 0.163 UoM mg/L? 79 Subdivision - Wells #1 & #2 NCO088552 Aqua North Carolina Inc - Colonial Woods 001 5 9 2017 01055 - Manganese, Total (as Mn) ug/I 0.018 UoM mg/L? 80 Subdivision - Wells #1 & #2 NCO088552 Aqua North Carolina Inc - Colonial Woods 001 5 9 2017 01092 - Zinc, Total (as Zn) ug/I 0.01 LESSTHAN UoM mg/L? 81 Subdivision - Wells #1 & #2 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 A C F G H I K N O P T I U 1 Permit Facility Outfall Month Day Year Parameter UOM Value Modifier Comments NCO088552 Aqua North Carolina Inc - Colonial Woods 002 5 9 2017 01092 - Zinc, Total (as Zn) ug/I 0.03 UoM mg/L? 82 Subdivision - Wells #1 & #2 NCO088552 Aqua North Carolina Inc - Colonial Woods 002 6 26 2018 50060 - Chlorine, Total Residual ug/I 0 PQL? 83 Subdivision - Wells #1 & #2 NCO088609 Aqua North Carolina Inc - Windgate 001 9 29 2015 01045 - Iron, Total (as Fe) ug/I 0.14 UoM mg/L? 84 Subdivision - #1 NCO088609 Aqua North Carolina Inc - Windgate 001 1 19 2016 50060 - Chlorine, Total Residual ug/I 0 PQL? 85 Subdivision - #1 NCO088609 Aqua North Carolina Inc - Windgate 001 6 7 2016 50060 - Chlorine, Total Residual ug/I 0 PQL? 86 Subdivision - #1 NCO088609 Aqua North Carolina Inc - Windgate 001 8 9 2016 01045 - Iron, Total (as Fe) ug/I 2.14 UoM mg/L? 87 Subdivision - #1 NCO088609 Aqua North Carolina Inc - Windgate 001 8 9 2016 01055 - Manganese, Total (as Mn) ug/I 2.64 UoM mg/L? 88 Subdivision - #1 NCO088609 Aqua North Carolina Inc - Windgate 001 10 11 2016 50060 - Chlorine, Total Residual ug/I 0 PQL? 89 Subdivision - #1 NCO088609 Aqua North Carolina Inc - Windgate 001 11 15 2016 01045 - Iron, Total (as Fe) ug/I 2.64 UoM mg/L? 90 Subdivision - #1 NCO088609 Aqua North Carolina Inc - Windgate 001 11 15 2016 01055 - Manganese, Total (as Mn) ug/I 1.19 UoM mg/L? 91 Subdivision - #1 NCO088609 Aqua North Carolina Inc - Windgate 001 11 15 2016 50060 - Chlorine, Total Residual ug/I 0 PQL? 92 Subdivision - #1 NCO088609 Aqua North Carolina Inc - Windgate 001 2 22 2017 01045 - Iron, Total (as Fe) ug/I 0.109 UoM mg/L? 93 Subdivision - #1 NCO088609 Aqua North Carolina Inc - Windgate 001 2 22 2017 01055 - Manganese, Total (as Mn) ug/I 0.105 UoM mg/L? 94 Subdivision - #1 NCO088609 Aqua North Carolina Inc - Windgate 001 5 9 2017 01045 - Iron, Total (as Fe) ug/I 0.101 UoM mg/L? 95 Subdivision - #1 NCO088609 Aqua North Carolina Inc - Windgate 001 5 9 2017 01055 - Manganese, Total (as Mn) ug/I 0.09 UoM mg/L? 96 Subdivision - #1 NCO088609 Aqua North Carolina Inc - Windgate 001 8 1 2017 50050 - Flow, in conduit orthru mgd 0.00014 decimal place? 97 Subdivision - #1 treatment plant NCO088609 Aqua North Carolina Inc - Windgate 001 8 8 2017 50050 - Flow, in conduit orthru mgd 0.00014 decimal place? 98 Subdivision - #1 treatment plant NCO088609 Aqua North Carolina Inc - Windgate 001 8 15 2017 50050 - Flow, in conduit orthru mgd 0.00014 decimal place? 99 Subdivision - #1 treatment plant NCO088609 Aqua North Carolina Inc - Windgate 001 8 29 2017 50050 - Flow, in conduit orthru mgd 0.00014 decimal place? 100 Subdivision - #1 treatment plant NCO088609 Aqua North Carolina Inc - Windgate 001 4 17 2018 50060 - Chlorine, Total Residual ug/I 0 PQL? 11011 1 Subdivision - #1 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 A C F G H I K N O P T I U 1 Permit Facility Outfall Month Day Year Parameter UOM Value Modifier Comments NCO088617 Aqua North Carolina Inc - Snow Hill 001 8 9 2016 01045 - Iron, Total (as Fe) ug/I 0.18 UoM mg/L? 102 Subdivision NCO088617 Aqua North Carolina Inc - Snow Hill 001 8 9 2016 01055 - Manganese, Total (as Mn) ug/I 0.01 UoM mg/L? 103 Subdivision NCO088617 Aqua North Carolina Inc - Snow Hill 001 10 25 2016 50060 - Chlorine, Total Residual ug/I 0 PQL? 104 Subdivision NCO088617 Aqua North Carolina Inc - Snow Hill 001 11 15 2016 01045 - Iron, Total (as Fe) ug/I 1.45 UoM mg/L? 105 Subdivision NCO088617 Aqua North Carolina Inc - Snow Hill 001 11 15 2016 01055 - Manganese, Total (as Mn) ug/I 0.033 UoM mg/L? 1061 Subdivision NCO088617 Aqua North Carolina Inc - Snow Hill 001 2 22 2017 01045 - Iron, Total (as Fe) ug/I 1.48 UoM mg/L? 107 Subdivision NCO088617 Aqua North Carolina Inc - Snow Hill 001 2 22 2017 01055 - Manganese, Total (as Mn) ug/I 0.038 UoM mg/L? 108 Subdivision NCO088617 Aqua North Carolina Inc - Snow Hill 001 5 9 2017 01045 - Iron, Total (as Fe) ug/I 2.37 UoM mg/L? 1091 Subdivision NCO088617 Aqua North Carolina Inc - Snow Hill 001 5 9 2017 01055 - Manganese, Total (as Mn) ug/I 0.062 UoM mg/L? 110 Subdivision NCO088625 Aqua North Carolina Inc -The Hollows 001 10 28 2015 01055 - Manganese, Total (as Mn) ug/I 0.016 UoM mg/L? 111 Subdivision NCO088625 Aqua North Carolina Inc -The Hollows 001 8 9 2016 01045 - Iron, Total (as Fe) ug/I 3.6 UoM mg/L? 1121 Subdivision NCO088625 Aqua North Carolina Inc -The Hollows 001 8 9 2016 01055 - Manganese, Total (as Mn) ug/I 1.63 UoM mg/L? 113 Subdivision NCO088625 Aqua North Carolina Inc -The Hollows 001 9 28 2016 01055 - Manganese, Total (as Mn) ug/I 0.036 UoM mg/L? 114 Subdivision NCO088625 Aqua North Carolina Inc -The Hollows 001 10 12 2016 01055 - Manganese, Total (as Mn) ug/I 0.166 UoM mg/L? 1151 Subdivision NCO088625 Aqua North Carolina Inc -The Hollows 001 11 15 2016 01055 - Manganese, Total (as Mn) ug/I 0.078 UoM mg/L? 116 Subdivision NCO088625 Aqua North Carolina Inc -The Hollows 001 2 22 2017 01045 - Iron, Total (as Fe) ug/I 0.0675 UoM mg/L? 117 Subdivision NCO088625 Aqua North Carolina Inc -The Hollows 001 2 22 2017 01055 - Manganese, Total (as Mn) ug/I 0.497 UoM mg/L? 1181 Subdivision NCO088625 Aqua North Carolina Inc -The Hollows 001 2 7 2017 50060 - Chlorine, Total Residual ug/I 0 PQL? 119 Subdivision NCO088625 Aqua North Carolina Inc -The Hollows 001 4 12 2017 01045 - Iron, Total (as Fe) ug/I 0.163 UoM mg/L? 120 Subdivision NCO088625 Aqua North Carolina Inc -The Hollows 001 4 12 2017 01055 - Manganese, Total (as Mn) ug/I 0.392 UoM mg/L? 11211 ISubdivision DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 A C F G H I K N O P T I U 1 Permit Facility Outfall Month Day Year Parameter UoM Value Modifier Comments NCO088625 Aqua North Carolina Inc -The Hollows 001 5 10 2017 01045 - Iron, Total (as Fe) ug/I 0.208 UoM mg/L? 122 Subdivision NCO088625 Aqua North Carolina Inc -The Hollows 001 5 10 2017 01055 - Manganese, Total (as Mn) ug/I 0.309 UoM mg/L? 123 Subdivision NCO088625 Aqua North Carolina Inc -The Hollows 001 11 21 2017 01055 - Manganese, Total (as Mn) ug/I 7 UoM mg/L? 124 Subdivision NCO088625 Aqua North Carolina Inc -The Hollows 001 12 12 2017 01045 - Iron, Total (as Fe) ug/I 0.282 UoM mg/L? 125 Subdivision NCO088625 Aqua North Carolina Inc -The Hollows 001 12 12 2017 01055 - Manganese, Total (as Mn) ug/I 0.313 UoM mg/L? 126 Subdivision NCO088633 Aqua North Carolina Inc - Reeves Woods 001 9 29 2015 01055 - Manganese, Total (as Mn) ug/I 0.709 UoM mg/L? 127 Subdivision Well #2 NCO088633 Aqua North Carolina Inc - Reeves Woods 001 8 9 2016 01045 - Iron, Total (as Fe) ug/I 2.3 UoM mg/L? 128 Subdivision Well #2 NCO088633 Aqua North Carolina Inc - Reeves Woods 001 8 9 2016 01055 - Manganese, Total (as Mn) ug/I 0.77 UoM mg/L? 1291 Subdivision Well #2 NCO088633 Aqua North Carolina Inc - Reeves Woods 001 10 25 2016 50060 - Chlorine, Total Residual ug/I 0 PQL? 130 Subdivision Well #2 NCO088633 Aqua North Carolina Inc - Reeves Woods 001 11 15 2016 01055 - Manganese, Total (as Mn) ug/I 4 UoM mg/L? 131 Subdivision Well #2 NCO088633 Aqua North Carolina Inc - Reeves Woods 001 12 6 2016 50060 - Chlorine, Total Residual ug/I 0 PQL? 1321 Subdivision Well #2 NCO088633 Aqua North Carolina Inc - Reeves Woods 001 2 22 2017 01045 - Iron, Total (as Fe) ug/I 6.79 UoM mg/L? 133 Subdivision Well #2 NCO088633 Aqua North Carolina Inc - Reeves Woods 001 2 22 2017 01055 - Manganese, Total (as Mn) ug/I 1.33 UoM mg/L? 134 Subdivision Well #2 NCO088633 Aqua North Carolina Inc - Reeves Woods 001 5 9 2017 01045 - Iron, Total (as Fe) ug/I 1.27 UoM mg/L? 1351 Subdivision Well #2 NCO088633 Aqua North Carolina Inc - Reeves Woods 001 5 9 2017 01055 - Manganese, Total (as Mn) ug/I 0.274 UoM mg/L? 136 Subdivision Well #2 NCO088854 Aqua North Carolina Inc - Pine Lakes 001 4 28 2015 50060 - Chlorine, Total Residual ug/I 0 PQL? 137 Subdivision - Well # 2 NCO088854 Aqua North Carolina Inc - Pine Lakes 001 12 15 2015 50060 - Chlorine, Total Residual ug/I 0 PQL? 1381 Subdivision - Well # 2 NCO088854 Aqua North Carolina Inc - Pine Lakes 001 8 9 2016 01055 - Manganese, Total (as Mn) ug/I 0.026 UoM mg/L? 139 Subdivision - Well # 2 NCO088854 Aqua North Carolina Inc - Pine Lakes 001 8 9 2016 01092 - Zinc, Total (as Zn) ug/I 0.176 UoM mg/L? 140 Subdivision - Well # 2 NCO088854 Aqua North Carolina Inc - Pine Lakes 001 9 13 2016 01055 - Manganese, Total (as Mn) ug/I 0.02 UoM mg/L? 11411 ISubdivision - Well # 2 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 A C F G H I K N O P T I U 1 Permit Facility Outfall Month Day Year Parameter UoM Value Modifier Comments NCO088854 Aqua North Carolina Inc - Pine Lakes 001 11 15 2016 01055 - Manganese, Total (as Mn) ug/I 0.009 UoM mg/L? 142 Subdivision - Well # 2 NCO088854 Aqua North Carolina Inc - Pine Lakes 001 11 15 2016 01092 - Zinc, Total (as Zn) ug/I 0.213 UoM mg/L? 143 Subdivision - Well # 2 NCO088854 Aqua North Carolina Inc - Pine Lakes 001 2 22 2017 01055 - Manganese, Total (as Mn) ug/I 0.005 LESSTHAN UoM mg/L? 144 Subdivision - Well # 2 NCO088854 Aqua North Carolina Inc - Pine Lakes 001 5 10 2017 01045 - Iron, Total (as Fe) ug/I 0.025 LESSTHAN UoM mg/L? 145 Subdivision - Well # 2 NCO088854 Aqua North Carolina Inc - Pine Lakes 001 5 10 2017 01055 - Manganese, Total (as Mn) ug/I 0.006 UoM mg/L? 146 Subdivision - Well # 2 NCO088854 Aqua North Carolina Inc - Pine Lakes 001 5 10 2017 01092 - Zinc, Total (as Zn) ug/I 0.101 UoM mg/L? 147 Subdivision - Well # 2 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 ■ Complete items 1, 2, and 3. Also complete item 4 if Restricted Delivery is desired. ■ Print your name and address on the reverse so that we can return the card to you. ■ Attach this card to the back of the mailpiece or on the front if space permits. Shannon V. Becker, President c/o Amanda Berger Aqua North Carolina, Inc. 202 Mackenan Court Cary NC 27511 A. Signat ft3) X C Agent ❑ Addressee S. Received fa me) C. Date of Deliver �c, P M-�No D. 11.460 ve re ❑ Yes 1 ES, enter delivery address bililligmill6. ❑ No MAY 14 2019 3. Servio 7-uJ ❑ Certified Mail ❑ Express Mail ❑ Registered ❑ Return Receipt for Merchandise ❑ Insured Mail ❑ C.O.D. 4. Restricted Delivery? (Extra Fee) ❑ Yes ?016 2140 0000 43?1 11?9 PS Form 3811, February 2004 Domestic Return Receipt 102595-02-M-154 tr r` a Domestic Mail Only F-or delivery information, visit our website at www.usps.com". M1 Certified Mail Fee m $ Extra Services & Fees (check box, add fee as appropriate) ❑ Return Receipt (hardcopy) $ 0 ❑ Return Receipt (electronic) $ Postmark C3 ❑ Certified Mail Restricted_pellvery $ Here r-3 t3 _ ❑Adult Signature Required $ []Adult Signature Restricted DellvervI p Postage ru Shannon V. Becker, President c/o Amanda Berger rn a Aqua North Carolina, Inc. a 202 Mackenan Court-- - r.. Cary, NC 27511 PS Form 3800, April 2015 PSN 7630-02-000-9047 See "` Reverse for DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 Denard, Derek From: Berger, Amanda A <AAOwens@aquaamerica.com> Sent: Tuesday, July 02, 2019 3:13 PM To: Denard, Derek Cc: Hudson, Gary; Pearce, Joseph R; Ison, Laurie T; McDaniel, David T; Boone, Ron Subject: [External] RE: Request for Additional Information -NPDES permit NC0088552; NC0088501; NC088854 Attachments: Request for Additional Information - Aqua - Stonington Subdivision - Well #1 - NPDES permit NC0088501; Request for Additional Information - Aqua - Pine Lakes Subdivision - Well #2 WTP - NPDES permit NC0088854; Aqua_Hardness Results.pdf EExternal email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to � Hi Derek, We have received the hardness results requested for Stonington (NC0088501), Pine Lakes (NC0088854), and Colonial Woods (NC0088552). The lab sent them in one file; therefore, I am including the entire set for all three permits listed (attached). If you have any questions, please contact me. Thank you, � ¢rN Amanda Berger Director of Environmental Compliance Aqua North Carolina 202 MacKenan Ct; Cary, NC 27511 0:919.653.6965 M:910.773.0406 From: Denard, Derek <derek.denard@ncdenr.gov> Sent: Monday, May 06, 2019 5:57 PM To: Berger, Amanda A <AAOwens@aquaamerica.com> Cc: Hudson, Gary <gary.hudson@ncdenr.gov> Subject: Request for Additional Information - Aqua - Colonial Woods Subdivision — Wells #1 & #2 WTP - NPDES permit NCO088552 Dear Ms. Berger: The Division has reviewed your application, received on July 6, 2018, for renewal of NPDES permit NC0088552. To enable us complete our review in accordance with N.C.G.S. 143-215.1 and 15A NCAC 2H.0105, please provide additional or revised information to address the following comments: DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 1. Please provide five (5) days of Total Hardness (CaCO3 or (Ca + Mg)) data for the effluent at Outfalls 001 and 002. 2. Please note the attached data reporting errors form May2014 to October 2018 for permit NCO088552 and others. The data for Zinc is of most importance for this additional information request. Many errors involved reporting the incorrect unit of measure (UoM) such as mg/L verses µg/L. Another error noted was reporting a value of zero (0) for "no detection" for Total Residual Chorine (TRC) results instead of reporting the method practical quantitation limit (PQL) such as < 20 µg/L. If these are indeed errors, please correct DMRs accordingly. Please note you may want to review and correct DMRs since October 2018 as well. The NC 2007-2014 Water Quality Standard (WQS) Triennial Review was approved by the NC Environmental Management Committee (EMC) on November 13, 2014. The US EPA subsequently approved the WQS revisions on April 6, 2016 with some exceptions. The NC Division of Water Resources is required to implement the new dissolved metal standards in all permits public noticed after April 6, 2016. The new standards for most metals include acute standards. Furthermore, the freshwater standards for several metals are expressed as the dissolved form of the metals, and seven metals have hardness -dependent equations. As a result, the Division will need site -specific effluent hardness data and instream hardness data, upstream of the discharge, for each facility monitoring these metals in order to calculate permit limitations. The metal of concern for this permit renewal is Zinc. To evaluate dissolved Zinc, a Reasonable Potential Analysis (RPA) was conducted using data from DMRs (May2014— Oct2018) [see attached RPA spreadsheets for Outfalls 001 & 002]. Results indicated a reasonable potential to exceed the new dissolved metals standard for Zinc. Consequently, the following daily maximum limits (acute standard) and monthly average limits (in this case the acute standard) for Total Zinc could be applied for this permit renewal: Parameter Outfall Monthly Average Daily Maximum Zinc 001 No Limit No Limit Zinc 002 125.7 µg/L 125.7 µg/L Please note that the hardness -dependent water quality standard for zinc typically results in a more stringent permit limit for the acute total allowable metal verses the chronic value. In this situation, we use the acute total allowable metal concentration (permit limit) as the limitation for both the Daily Maximum and the Monthly Average. To calculate these limits a default hardness of 25 mg/L was entered for both the effluent and upstream values. Since this facility discharges under zero flow conditions a value of 0 was entered for all stream flow data for both Oufalls 001 & 002. Please note that under zero flow conditions the default value of 25 mg/L will be using for the upstream Total Hardness. Additionally, the maximum monthly average flows of 0.001 MGD for Outfall 001 and 0.001239 MGD for Outfall 002 from November 2015 to October 2018 (3 years) data was used as the effluent flow. For a summary of this information, please see the attached "Dissolved to Total Metal Calculator". If no response is received within 60 calendar days [per 15A NCAC 2H.0107(b)], the permit will be renewed without the benefit of the requested additional information. Therefore, a default effluent hardness of 25 mg/L will be used to calculate effluent limits for Zinc as indicated above. Please submit the additional information requested by one of the following: Electronically: derek.denard@ncdenr.gov Address For USPS: Attention: Derek Denard Division of Water Resources WQ Permitting Section — NPDES 1617 Mail Service Center Raleigh, NC 27699-1617 Physical Address For parcel packages: Attention: Wren Tredford Division of Water Resources WQ Permitting Section — NPDES 512 N. Salisbury Street (9th Floor -Archdale Bldg) DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 Raleigh, NC 27604 If you have any questions, please contact Derek Denard at 919-807-6307 or email at.derek.denard@ncdenr.gov. Sincerely, Derek C Denard Environmental Specialist Compliance & Expedited Permitting Unit N.C. Division of Water Resources N.C. Department of Environmental Quality 919 707 3618 office 919 707 9000 main DWR derek.denard(a)-ncdenr.gov N. C. Division of Water Resources Water Quality Permitting Section - NPDES 1617 Mail Service Center Raleigh, NC 27699-1617 Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third parties. DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 RESEARCh & ANALYTICAL Report of Analysis LA o RATO Ri ES, INC. 7/2/2019 J�•`G,�b For: Aqua NC -Kville ��� , ••'''"i;"••�• 152 B Furlong Ind Drive; °C Kernersville, NC c� N C V 3 4 Attn: Dave McDaniel S NC #37701 r �, Client Sample ID: Site: Stonington Upstream Aqua NC - Kville Lab Sample ID: 68549-01 Collection Date: 6/24/2019 15:45 Parameter Method Result Units Rev Limit Analyst Analysis DaterrTime Hardness, Total SM 2340 C-1997 25.2 mg/L 1 AB 7/1/2019 Client Sample ID: Site: Stonington Effluent Aqua NC - Kville Lab Sample ID: 68549-02 Collection Date: 6/24/2019 16:15 Parameter Method Result Units Rea Limit Analyst Analysis DatefTime Hardness, Total SM 2340 C-1997 66.9 mg/L 1 AB 7/1/2019 Client Sample ID: Site: Stonington Upstream Aqua NC - Kville Lab Sample ID: 68549-03 Collection Date: 6/25/2019 7:00 Parameter Method Result Units Rep Limit Analyst Analysis Date/Time Hardness, Total SM 2340 C-1997 25.2 mg1L 1 AB 7/1/2019 Client Sample ID: Site: Stonington Effluent Aqua NC - Kville Lab Sample ID: 68549-04 Collection Date: 6/25/2019 7:20 Parameter Method Result Units Rep Limit Analyst Analysis Dateaime Hardness, Total SM 2340 C-1997 63.1 mg1L 1 AB 7/1/2019 NA = not analyzed P.O. Box 473 106 Short Street Kernersville, North Carolina 27284 Tel: 336-996-2841 Fax: 336-996-0326 www.randalabs.com Page 1 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 RESEARCh & ANA1yT[CA[ LAbORATO&S, INC. Analytical /Process Consultations Phone (3313] 996-2841 CHAIN OF CUSTODY RECORD COMPANY JOB NO. r- o=�a� y•• O'CO O y m��'r" �O' �n" O'z' � \Qm�ci �O' JcQ QCr O O p o o and ��c ` U O Q - ti ry ryh N� .v ,v v ,v �\� REQUESTED ANALYSIS STREETAD S PROJE n CITY. STATE, ZIP SAMPLER NAME (PLEASEPAINT) } CONTACTPHONE SAMPLER SIGE SAMPLE NUMBER (LAB USE ONLY) DATE TIME COMP GRAB TEMP oC RES CI (11r& CHLORINE REMOVED (Y.N) S111PLE MATRIX IS.M SAMPLE LOCATION f I.D. ov 2 IS s J .- 2`� '2J RELINQUISHED BY a �—)v j DATETIME 05F" RECEIVED BY �5; "Uce;�� REMARKS: r SAMPLE TEMPERATURE AT RECEIPT i °C RELINQUISHED BY DATEfrIME RECEIVED BY - DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 RESEARCh & ANALYTICAL L.AWRATORIES, INC. For: Aqua NC -Kville 152 B Furlong Ind Drive Kernersville, NC Attn: Dave McDaniel Client Sample ID: Stonington Upstream Site: Aqua NC - Kville Report of Analysis 7/2/2019 Isit IaaIIII fif •�r4 d] NC 434 Z: � w s NC #i37701 I. rim ........... �C) % c` Lab Sample ID: 68597-01 Collection Date: 6/26/2019 7:00 Parameter Method Result Units Rep Limit Analyst Analysis Date/Time Hardness, Total SM 234U C:-1 U9 z6.L mgrL I MD r r ucV i Client Sample ID: Stonington Effluent Lab Sample ID: 68597-02 Site: Aqua NC - Kville Collection Date: 6/26/2019 7:15 Parameter Method Result Units Rep Limit Analys Analysis Datealme Hardness, Total SM 2340 C-1997 66.0 mg/L 1 AB 7/1/2019 NA = not analyzed P.O. Box 473 106 Short Street Kernersville, North Carolina 27284 Tel, 336-996-2841 Fax: 336-996-0326 www.randalabs.com Page 1 DocuSign Envelope ID: C7535579-E572-455D B02E-7ED6E2A9D8D7 L U) J Q rt `] Q N LU CO ` CO 1 ,❑/ L G. LLJ OLLI Q.' Mw E W ur O w 0 Vr� JJ . U) Li � OSr Osa�'orEy/Nb�J� a//�aJ s S (�/ay resPa LL w o Z /o a •�Sst ayoJd>t Q °s/Y U b sJ'y ry xO(J d'�os adf z ° SN3NIVIN03j0'ON v — W G - z V �j � z 0] W 0 Q W a b 0 Q c¢n V Z? N_ Vi Ud- W m DD CU Ly ai � o CS a 07 V � am QCD `� w o �� L��� C w CO D y� n w a a' N Q < w U) if .LI, sl�'I II!Illllilll lil!e fl3'lll I I I I II I IIII I I tI I I I I I I I I I I I I I 11 I I I I MESS M■■■■■■■■■■■■■■ r `q C W I< C 5 4 �� 1 m m zo LU Ln cn co J Z, w U LU CC LU I- uj _1 ci 2E Q 0 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 RESEARCh & ANA1yTICA1 F1 LAbORATORIESF INC& For: Aqua NC -Kville 152 B Furlong Ind Drive Kernersville, NC Attn: Dave McDaniel Report of Analysis 7/2/2019 4+r11111##I" Aft WOO LCO it jo 0 NC 434 Z01 NC #37701 + t *� D I�II###110 Client Sample ID: Stonington Upstream Lab Sample ID: 68669-01 Site: Aqua NC - Kville Collection Date: 6/27/2019 7:00 Parameter Method Result Units Rep Limit Analyst Analysis Date/Time Hardness, Total SM 2340 C-1997 26.2 mg/L 1 AB 7I112019 Client Sample ID: Stonington Effluent Lab Sample ID: 68669-02 Site: Aqua NC - Kville Collection Date: 6/27/2019 7:25 Parameter Method Result Units Rea Limit Analyst Analysis Daterrime Hardness, Total SM 2340 C-1997 64.0 mg/L 1 AB 7/1/2019 NA = not onalyzed P.O. Box 473 106 Short Street Kernersville, North Carolina 27284 TeL 336-996-2841 Fax 336-996-0326 www.randalabs.com Page 1 DocuSign Envelope ID:C7535579-E572-455D-BO2E-7ED6E2A9D8D7 RESEARCh & ANA1yTICAL LABORATORIES, INC. Analytical / Process Consultations Phone 1336) 996-2341 CHAIN OF CUSTODY RECORD I WATER I WASTEWATER I MISC. I COMPANY JOB NO. R S°' u, U4 z o� �ma-Z� 5 `¢ Z U°° JcQ 0`acle Z `Fti cc, co, 1P a m U U co ` ` L 1 Q Q U Q� O ¢ Q Q Nv ry ryyo �}� *✓ �" �" �`� REQUESTED ANALYSIS STREETAD SS PROJECT CITY, STATE, ZIP SAMPLER NAME (PLEASE PRINT) CONTACT PHONE SAMPLER SIGNATU 7 SAMPLENUMBER (LAB USE ONLY) RATE TIME COMP GRAB TEMP 'C RES i V1 CHLORINE R�10N}D SA 1s�wl SAMPLE LOCATIO 11.R. 9 -z� �- -,�' r I RELINQUISHED BY DATEFIME RECEIVED BY REMARKS: SAMPLE TEMPERATURE AT RECEIPT `� °C RELimQUISH D BY AT TFIME RECEIVED BY DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 RESEARCh & ANALYTICAL LAbORATORI ESP I NC. For: Aqua NC-Kville 152 B Furlong Ind Drive Kernersville, NC Attn: Dave McDaniel Client Sample ID: Stonington Upstream Site: Aqua NC - Kville Report of Analysis 712I2019 `+1116311rrat' CO so NC #34 x NC #37701 Lab Sample ID: 68719-01 Collection Date: 6/28/2019 7:00 'arameter Method Result Units Rep Limit Analyst Analysis DateFrime Hardness, Total SM 2340 C-1997 25.2 mg1L 1 AC rrircu is Client Sample ID: Stonington Effluent Lab Sample ID: 68719-02 Site: Aqua NC - Kville Collection Date: 6/28/2019 7:45 Parameter Method Result Units Rep Limit Anal Analysis DaterTime Hardness, Total SM 2340 C-1997 67.9 mg/L 1 AB 7/1/2019 NA = not analyzed P.O. Box 473 106 Short Street Kernersville, North Carolina 27284 Tel: 336-996-2841 Fax: 336-996-0326 www.randalabs.com Page 1 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 RESEARCh & ANALyTICAI LABORATORIES, INC. Analytical 1 Process Consultations Phone (3361 996-2841 CHAIN OF CUSTODY RECORD WATER! WASTEWATER I Mist. COMPANY JOB NO, " Uj Uj r; z ��1 o� o. ti Q a rv1 do �C9 0�p ��9 m a C9 (Z ry� �{ ry�� ryho ^" ^ �" �REQUESTED ANALYSIS STREETADDRESS PROJECT CITY, STATE, ZIP SAMPLER NAME (PL SE PRINT) , 7 ( CONTACT PHONE SAMPLER S N C SAMPLE NUMBER (LAB USE ONLY) DATE TIME COMP GRAB TEMP ,C RES A')EMOV+D CHLOWNE suer lsa4X SAMPLE LOC IONII.D. S lBq f-- l ('fR r vLG i9 RELINQUI H Y DATEITIN�F, RECEIVED BY REMARKS: SAMPLE TEMPERATURE AT RECEIPT °C RELINQUISHED BY DATEITIME RECEIVED BY DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 RESEARCh & ANAtyTICAI LAbORATORIES, INC. For: Aqua NC -Kville 152 B Furlong Ind Drive Kernersville, NC Attn: Dave McDaniel Client Sample ID: Pinelakes Effluent Site: Aqua NC - Kville Parameter Hardness, Total Method SM 2340 C-1997 Client Sample ID: Pinelakes Upstream Site: Aqua NC - Kville Larameter Method dness, Total SM 2340 C-1997 P.O. Box 473 106 Short Street Kernersville, North Carolina 27284 rai coa basic v I ei Report of Analysis 7/2/2019 fop NC#34 Z. - s NC#37701 Lab Sample ID: 68753-01 Collection Date: 6/24/2019 12:43 Result Units Rep Limit Analyst Analysis DatelTime 28.1 mg/L 1 AB 7/1/2019 Lab Sample ID: 68753-02 Collection Date: 6/24/2019 13:19 Result Units Rep Limit Analyst Analysis Date/Time 12.6 mg1L 1 AB 7/1/2019 NA = not onalyzed Tel: 336-996-2841 Fax: 336-996-0326 www.randalabs.com Page 1 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 RESEARCh & ANALyT1CAL LAbORATOR[ESF INC. For: Aqua NC -Kville 152 B Furlong Ind Drive Kernersville, NC Attn: Dave McDaniel Report of Analysis 7/2/2019 ' {Zt9111It#14 w NC#34 y; % NC#37701 • .. Client Sample ID: Colonial Woods Upstream Lab Sample ID: 68754-01 Site: Aqua NC - Kville Collection Date: 6/24/2019 14:55 Parameter Method Result Units Rea Limit Analyst Analysis Dateffime Hardness, Total SM 2340 C-1997 9.70 mg/L 1 AB 7/1/2019 Client Sample ID: Colonial Woods #1 Effluent Lab Sample ID: 68754-02 Site: Aqua NC - Kville Collection Date: 6/24/2019 13:50 Parameter Method Result Units Rea Limit Analyst Analysis DatelTime Hardness, Total SM 2340 C-1997 45.6 mglL 1 AB 7/1/2019 Client Sample ID: Colonial Woods #2 Effluent Lab Sample ID: 68754-03 Site: Aqua NC - Kville Collection Date: 6/24/2019 14:22 Parameter Method Result Units Rea Limit Analyst Analysis Date/Time Hardness, Total SM 2340 C-1997 39.7 mg1L 1 AB 7/1/2019 NA = not analyzed P.O. Box 473 106 Short Street Kemersville, North Carolina 27284 Tel: 336-996-2841 Fax 336-996-0326 www.randalabs.com Page 1 al coa hns,;r VI", DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 RESEARCh & ANALYTICA[ LAbORATORiESF INC. For: Aqua NC -Kville 152 B Furlong Ind Drive Kernersville, NC Attn: Dave McDaniel Report of Analysis 7/2/2019 . �+irrtrirri��i w o .o• Ltr� NC#311 R s NC #37701 r.,,.E..... ;.�0 l/ED ANC* Client Sample 10: Site: Pinelakes Upstream Aqua NC - Kville Lab Sample ID: 68755-01 Collection Date: 6/25/2019 15:20 Parameter Method T Result Units Rep Limit Analy Analysis DatelTime Hardness, Total SM 2340 C-1997 13.6 mg1L 1 AB 7/1/2019 Client Sample ID: Site: Pinelakes Effluent Aqua NC - Kville Lab Sample ID: 68755-02 Collection Date: 6/25/2019 14:35 Parameter Method Result Units Rep Limit Analyst Analysis DatelTime Hardness, Total SM 2340 C-1997 27.2 mglL 1 AB 7/1/2019 NA = not analyzed P.O. Box 473 106 Short Street Kernersville, North Carolina 27284 Tel; 336-996-2841 Fax: 336-996.0326 www randalabs.com Page 1 . .ic vlcl DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 RESEARCh & ANALyT1CAL LABORATORIES, INC. For: Aqua NC -Kville 152 B Furlong Ind Drive Kernersville, NC Attn: Dave McDaniel Report of Analysis 7/2/2019 ` &tiS11111Rrii4i do • A; ;C� •• M NC ##34 � • ;: S NC ##37701 G . 4-f;fP Nt D ANAL Client Sample ID: Colonial Woods Upstream Lab Sample ID: 68756-01 Site: Aqua NC - Kville Collection Date: 6/25/2019 15:45 Parameter Method Result Units Rep Limit Analyst Analysis Daterrime Hardness, Total SM 2340 C-1997 8.73 mglL 1 AB 7/1/2019 Client Sample 1D: Colonial Woods Effluent 1 Lab Sample ID: 68756-02 Site: Aqua NC - Kville Collection Date: 6/25/2019 16:00 Parameter Method Result Units Rep Limit Analyst Analysis DateMme Hardness, Total SM 2340 C-1997 45.6 mglL 1 AB 7/1/2019 Client Sample ID: Colonial Woods Effluent 2 Lab Sample ID: 68756-03 Site: Aqua NC - Kville Collection Date: 6/25/2019 16:15 Parameter Method Result Units Rep Limit Analyst Analysis_Date/Time Hardness, Total SM 2340 C-1997 39.8 mglL 1 AB 7/1/2019 NA = not analyzed P.O. Box 473 106 Short Street Kernersville, North Carolina 27284 Tel: 336-996-2841 Fax: 336-996-0326 www.randalabs.corn Page t rat coa barsie _ DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 RESEARCh & ANAtyTICAI LAbORATORlES, INC. For: Aqua NC -Kville 152 B Furlong Ind Drive Kernersville, NC Attn: Dave McDaniel Client Sample ID: Pinelakes Upstream Site: Aqua NC - Kville Report of Analysis 7/2/2019 H5 NC#34 �� • wI NC #37701 Lab Sample ID: 68757-01 Collection Date: 6/26/2019 8:06 larameter Method Result Units Rep Limit Analyst Analysis Date/Time Hardness, Total SM 2340 C-1997 14.b mgrL i Hrs I ircu ! V Client Sample ID: Pinelakes Effluent Lab Sample ID: 68757-02 Site: Aqua NC - Kville Collection Date: 6/26/2019 8:20 Parameter Method Result Units Rep Lirnit Analyst Analysis DatelTime Hardness, Total SM 2340 C-1997 27.2 mg/L 1 AB 7/1/2019 NA = not analyzed P.O. Box 473 106 Short Street Kernersville, North Carolina 27284 Tel: 336-996-2841 Fax: 336-996-0326 www.randalabs.com Page S DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 RESEARCh & ANA1yTICAL LAbORATORIESF INC. For: Aqua NC -Kville 152 B Furlong Ind Drive Kernersville, NC Attn: Dave McDaniel Client Sample ID: Colonial Woods Upstream Site: Aqua NC - Kville Report of Analysis 7/2/2019 1�{IIIIII1+�I ♦,SO Ir ♦`[J .'`(�� L Cry �w i41 a. fop NC #34 �� N Z NC #37701 Lab Sample ID: 68758-01 Collection Date: 6/26/2019 11:12 arameter Method Result Units Rep Limit Anal st Analysis Date/Time Hardness, Total SM 2340 U-1 V9 r Client Sample ID: Colonial Woods Effluent 1 Site: Aqua NC - Kville S Parameter Method Hardness, Total SM 2340 C-1997 Client Sample ID: Colonial Woods Effluent 2 Site: Aqua NC - Kville Parameter Method Hardness, Total SM 2340 C-1997 0.r13 rnya- Lab Sample 1D: 68758-02 Collection Date: 6/26/2019 11:52 Result Units Rep Limit Analys Analysis DatelTime 48.5 mg/L 1 AB 7/1/2019 Lab Sample ID: 68758-03 Collection Date: 6/26/2019 12:25 Result Units Rep Limit Analyst Analysis Date/Time 41.7 mg/L 1 AB 7/1/2019 NA = not analyzed P.O. Box 473 106 Short Street Kernersville, North Carolina 27284 Tel: 336-996-2841 Fax: 336-996-0326 www.randalabs.com Page 1 DocuSign Envelope ID: C7535579-E572-455D-BO2E-7ED6E2A9D8D7 RESEARCH & ANAlyTICAL LAbORATORI ES, INC. Analytical / Process Consultations Phone (336) 996-2841 CHAIN OF CUSTODY RECORD ( WATER I WASTEWATER I MISC. COMPANYj� JOB NO.ZP i i o z � 4 � cQ a mom z g� Q. co lb V elf �¢ Z �O` Jc� Q� �Ac = mho Q�' ,�-~ 50', O ��• �[rj oo` ,Z• 1 1 +` _ �5.c C� �� 0 0 Op mco`GOB m 1� m i` r ` c`, '}v L ry4jq ryho �" '" '� *v 5`m REQUESTED ANALYSIS STREET ADDRESS ' PROJECT I CITY, STATE, 21P — [ c i f �i1 L� � h 'ram L�, / G' � � / SAMPLER NAME (P SE PRINT) % �1 • t� 1 Lf+� G CONTACT PHONE } J SAMPLER SIGNATURE SAMPLE NUMBER (LAB USE ONLY) DATE TIME COldP GRAB TECP nEs { al2) CHLORINE REEWVED �I21 MATRIX SAMPLE LOCATIONILD. - c ?�e 2 el ' JG f 43 L201 �L` I C, . RELINQUISHED BY DATEMME RECEIVED BY REMARKS: SAMPLE TEMPERATURE AT RECEIPT °C RELINQUE$H D BY DATEmME REttNn AY DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 RESEARCh & ANA[yTICAL LAbORATORIESF INC. For: Aqua NC -Kville 152 B Furlong Ind Drive Kemersville, NC Attn: Dave McDaniel Report of Analysis 7/2/2019 ` ,s14t:1111jeri � Gib �t n��...•...... s ttp� Lp NC #34 Z� ! NC #37701 Client Sample ID: Pinelakes Effluent Lab Sample ID: 68759-01 Site: Aqua NC - Kville Collection Date: 6/27/2019 8:38 Parameter Method Result Units Rep Limit Analy Analysis Date/Time Hardness, Total SM 2340 C-1997 26.2 mg/L 1 AB 7/1/2019 Client Sample ID: Pinelakes Upstream Lab Samp[e ID: 68759-02 Site: Aqua NC - Kville Collection Date: 6/27/2019 9:20 Parameter Method Result Units Rep Limit Analyst Anal sis DatelTime Hardness, Total SM 2340 C-1997 13.6 mg/L 1 AB 7/1/2019 NA = not analyzed P.O. Box 473 106 Short Street Kernersville, North Carolina 27284 Tel: 336-996-2841 Fax: 336-996-0326 www.randalabs.com Page 1 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 RESEARCIi El ANA[yTICAL LAbORATORIESill" INC. For: Aqua NC -Kville 152 B Furlong Ind Drive Kernersville, NC Attn: Dave McDaniel Client Sample ID: Colonial Woods Upstream Site: Aqua NC - KviUe Kaameter Method Hardness, Total SM 2340 C-1997 Report of Analysis 7/2/2019 �� Q``1 + •• ••+,• Nil, :+� A 00 NC #34 7� w S NC#3770I i , , Lab Sample ID: 68760-01 Collection Date: 6/27/2019 14:50 Result lJnits Rep Limit An st Analysis Date/Time 7.76 mg/L 1 AB 7/1/2019 Client Sample ID: Colonial Woods Effluent 1 Lab Sample ID: 68760-02 Site: Aqua NC - KviUe Collection Date: 6/27/2019 15:02 Parameter Method Result Units Rep mit Analyst Analysis Date/Time Hardness, Total SM 2340 C-1997 47.5 mglt 1 AB 7/1/2019 Client Sample ID: Colonial Woods Effluent 2 Lab Sample ID: 68760-03 Site: Aqua NC - Kville Collection Date: 6/27/2019 15:12 Parameter Method Result Units Rep Limit Analyst Analysis ❑atefrime Hardness, Total SM 2340 C-1997 38.8 mglL 1 AB 7/1/2019 NA = not analyzed P.O. Box 473 106 Short Street Kernersville, North Carolina 27284 TeL 336-996-2841 Fax: 336-996-0326 www.randalabs.com Page 1 rai coo oa�c : id DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 RESEARCh & ANA1YTICAL LAboRATORIES, INC. For: Aqua NC -Kville 152 B Furlong Ind Drive Kernersville, NC Attn: Dave McDaniel Report of Analysis 7/2/2019 AMLi IwoaD NC #34 >� S NC#37701 ED Client Sample ID: Pinelakes Effluent Lab Sample ID: 68761-01 Site: Aqua NC - Kville Collection Date: 6/28/2019 8:15 Parameter Method Result Units Rep Limit Analyst Anal sis Date/Time Hardness, Total SM 2340 C-1997 272 mg/L 1 AB 7/1/2019 Client Sample ID: Pinelakes Upstream Lab Sample ID: 68761-02 Site: Aqua NC - Kville Collection Date: 6/28/2019 8:05 rParameter Method Result Units Rep Limit Analyst Analysis Date/Time l_ _ ...- -.-...- - Hardness, Total SM 2340 C-1997 11 B mg/L 1 AB 7/1/2019 NA = not analyzed P.O. Box 473 106 Short Street Kernersville, North Carolina 27284 Tel: 336-995-2841 Fax: 336-996-0326 www.randalabs.com Page 1 Fr,i I `aria v a DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 RESEARCh & ANA[YTICA[ LABORATORIES, INC. For: Aqua NC -Kville 152 B Furlong Ind Drive Kernersville, NC Attn: Dave McDaniel Report of Analysis 7/2/2D19 ANAL r�ssrerrrrrirs M NC#34 Z�N: NC #37701 •*rn us+ Client Sample ID: Colonial Woods Upstream Lab Sample ID: 68762-01 Site: Aqua NC - Kville Collection Date: 6/28/2019 11:00 Parameter Method Result Units Rep Limit Analyst Analysis Date/Time Hardness, Total SM 2340 C-1997 6.80 mg/L 1 AB 7/1/2019 Client Sample ID: Colonial Woods Effluent 1 Lab Sample ID: 68762-02 Site: Aqua NC - Kville Collection Date: 6/28/2019 11:12 Parameter Method Result Units Rep Limit Analy Analysis DatelTime Hardness, Total SM 2340 C-1997 46.6 mg/L 1 AB 7/1/2019 Client Sample ID: Colonial Woods Effluent 2 Lab Sample ID: 68762-03 Site: Aqua NC - Kville Collection Date: 6/28/2019 11:25 Parameter Method Result Units Rep Limit Analyst Analysis Date/Time Hardness, Total SM 2340 C-1997 40.7 mg/L 1 AB 7/1/2019 NA _ not onolyzed P.O. Box 473 106 Short Street Kernersville, North Carolina 27284 Tel: 336-996-2841 Fax: 336-996-0326 www.randalabs.com Page 1 ral DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 RESEARCh & ANA1yTiCA1 UbORATORIES, INC. Analytical / Process Consultations Phone (338) 996-2841 CHAIN OF CUSTODY RECORD COMPANY � t JOB NO. a 0 a � •r �• �qb, ram y v rya a,�� y~QZ 4i � - r 0 O' m �• \y h0 �0 Q• �0 0 �. y� 0 Np o-���cj ��� v v v v ry ry ry . .. REQUESTED ANALYSIS STREETADDRESS Af 4,41L r.I• li /,. ,r' PROJECT fI �1 e!'�f �[_[wIG�:�c.,Il �/i,,,fj.� CITY, STATE, SAMPLER NAME (PLEASE PRINT) CONTACT PHONE ILI- SAMPLER IGNATLIRE SAMPLENUMBERP (LAB USE ONLY! TIME COMP GRAB TEMP G RCS Ima4I aeieaRv p �gHY mpLr MATWX IS�y4 SAMPLE LOcATIONlI.D. o) �� Y �? � j�- s �1� / ��s ,f .)2 % /, ' lei. L- eZ- wa RELINQUISHED BY DATEMME RECEIVED BY REMARKS: SAMPLE TEMPERATURE AT RECEIPT _� °C RELINQUISHED BY DATEMME RECEIVED BY DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 2018 NC Intergrated Report Yadkin -Pee Dee River Basin 12-19 Buffalo Creek From source to Yadkin River Q E Qs} Upper Yadkin Subbasin 03040101' Classification C;Tr Length or Area 15 Units FW Miles Previous AU Number I rameter of Intere Benthos (Nar, AL, FW) Fish Community (Nar, AL, FW) Fish Tissue Mercury (Nar, FC, NC) Category Assessment Criteria Status Collection —Year Meeting Criteria 2012 Meeting Criteria 2012 4t Exceeding Criteria 2012 12-72-15 Bull Creek From source to Ararat River Classification C Length or Area 9 Units FW Miles Previous AU Number parameter of Interest or Category Assessment Criteria Status Collection —Year Benthos (Nar, AL, FW) 3a Data Inconclusive 2008 Fish Tissue Mercury (Nar, FC, NC) 4t Exceeding Criteria 2012 12-63-8 Burris Creek From source to Fisher River Classification WS-II;Tr,HQW Length or Area 4 Units FW Miles Previous AU Number Parameter of Interest Category Assessment Criteria Status Collection —Year Benthos (Nar, AL, FW) Meeting Criteria 1 2010 Fish Tissue Mercury (Nar, FC, NC) 4t Exceeding Criteria 2012 12-102-13-(2) Cedar Creek From Davie County SR 1410 to Dutchman Creek Classification C Length or Area 7 Units FW Miles Previous AU Number Parameter of Interes Category Assessment Criteria StatuJAIL-Collection Year Fish Community (Nar, AL, FW) Exceeding Criteria 2011 Fish Tissue Mercury (Nar, FC, NC) 4t Exceeding Criteria 2012 6/3/2019 2018 NC Integrated Report Page 1538 of 1747 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 MONITORING REPORT(MR) VIOLATIONS for: Permit: NCO088536 Rs Between 11 - 2013 and 10 - 2018 Region: Facility Name: % ParaName % County: Major Minor: Report Date: 12/06/18 Page: 1 of 1 Violation Category:% Program Category: Subbasin:% Violation Action: % dA PERMIT: NCO088536 FACILITY: Aqua North Carolina Inc - Bannertown Hills Subdivision COUNTY: Surry REGION: Winston-Salem - Well #2 Limit Violation MONITORING OUTFALL/ VIOLATION UNIT OF CALCULATED % REPORT PPI LOCATION PARAMETER DATE FREQUENCY MEASURE LIMIT VALUE Over VIOLATION TYPE VIOLATION ACTION 07-2017 001 Effluent Solids, Total Suspended - 07/25/17 2 X month mg/I 45 60 33.3 Daily Maximum Proceed to NOV Concentration Exceeded 07-2017 001 Effluent Solids, Total Suspended - 07/31/17 2 X month mg/I 30 34.3 14.3 Monthly Average Proceed to NOV Concentration Exceeded 05-2018 001 Effluent Solids, Total Suspended - 05/01/18 2 X month mg/I 45 47 4.4 Daily Maximum None Concentration Exceeded Monitoring Violation MONITORING OUTFALL/ VIOLATION UNIT OF CALCULATED % REPORT PPI LOCATION PARAMETER DATE FREQUENCY MEASURE LIMIT VALUE Over VIOLATION TYPE VIOLATION ACTION 08-2016 001 Effluent Turbidity 08/31/16 2 X month ntu Frequency Violation No Action, BPJ 10-2016 001 Effluent Turbidity 10/31/16 2 X month ntu Frequency Violation No Action, BPJ DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 United States Environmental Protection Agency Form Approved. EPA Washington, D.C.20460 OMB No. 2040-0057 Water Compliance Inspection Report Approval expires8-31-98 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 1 3 I NCO088552 111 121 18/11/06 I17 18 U 19 L G j 20I I 21III1 I I I I I III I I I I I I I I I I I I I I I I I I I I I I III I I I I I f6 Inspection Work Days Facility Self -Monitoring Evaluation Rating B1 QA ---------------------- Reserved ------------------- 671 72 LJ 73L174 75I III I I 70 LJ 71 itJ 80 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 permit Number) 09:30AM 18/11/06 14/05/01 Colonial Woods Subdivision - Wells #1 & #2 Atkins Ln Exit Time/Date Permit Expiration Date Mount Airy NC 27030 10:OOAM 18/11/06 19/01/31 Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) Other Facility Data HI Name, Address of Responsible Official/Title/Phone and Fax Number Contacted Gary Moseley,4163 Sinclair St Denver NC 28037H704-489-9404/7044899409 No Section C: Areas Evaluated During Inspection (Check only those areas evaluated) Other 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 Gary Hudson Division of Water Quality//336-776-9694/ Signature of Management Q A Reviewer Agency/Office/Phone and Fax Numbers Date EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete. Page# DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 NPDES yr/mo/day Inspection Type (Cont.) 31 NCO088552 1" 121 18/11/06 117 18 I C Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) November 26, 2018 Shannon V. Becker, President Aqua NC, Inc. 202 MacKenan Court Cary, NC 27511 Subject: Compliance Evaluation Inspection Nine Greensand Filtration Water Treatment Systems NPDES Permit No. NC0088536, NC0088552, NC0088528, NC0088625, NC0088498, NC0088633, NC0088617, NC0088609, NC0088854. Dear Mr. Becker: On November 6, 2018, Gary Hudson of this office met with William Young, ORC of Aqua NC, to perform a Compliance Evaluation Inspection on the nine NPDES permitted greensand water filtration plants located throughout Surry County. This type of inspection consists of two basic parts: an in -office file review and an on -site inspection of the treatment facility. The findings and observations are outlined below: Bannertown Hills Subdivision Well # 2 — NC0088536 Location: Town Lane, Mount Airy, NC 27030 Permitted Flow: 0.0016 MGD Discharge Point: Discharges into a flexible black plastic pipe that runs 100' downhill to the west of the plant, and eventually into an unnamed tributary to Faulkner Creek in the Yadkin -Pee Dee River Basin. Colonial Woods Subdivision — Wells 1 & 2 — NC0088552 Location: Atkins Lane, Mount Airy, NC 27030 Permitted Flow: 0.002 MGD Discharge Point: Discharges into a drain pipe that runs 100' downhill to the north of the plant, and eventually into an unnamed tributary to Bull Creek, a class "C" water in the Yadkin — Pee Dee River Basin. Hillcrest Subdivision — Well # 3 — NC0088528 Location: Lynnewood Drive, Mount Airy, NC 27030 Permitted Flow: 0.00168 MGD Discharge Point: Discharges under pressure into an underground gravel pit approximately 50' northwest of the water plant, and eventually into an unnamed tributary to Champ Creek, a class "C" water in the Yadkin -Pee Dee River Basin. Page# 2 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 Permit: NCO088552 Inspection Date: 11/06/2018 Owner - Facility: Colonial Woods Subdivision - Wells #1 & #2 Inspection Type: Compliance Evaluation The Hollows Subdivision — Well # 1 — NCO088625 Location: Lois Lane, Mount Airy, NC 27030 Permitted Flow: 0.002 MGD Discharge Point: Approximately 100' southwest of water plant, and eventually into an unnamed tributary to Stewarts Creek, class "C" waters in the Yadkin — Pee Dee River Basin. Mitchell Bluff Subdivision — Well # 1 — NCO088498 Location: Mitchell Cove Road, Elkin, NC 28621 Permitted Flow: 0.00168MGD Discharge Point: Into a PVC pipe that runs 100' to the west of the water plant, and eventually into an unnamed tributary to the Mitchell River in the Yadkin — Pee Dee River Basin. Reeves Woods Subdivision — Well # 2 — NCO088633 Location: Reeves Mill Road, Mount Airy, NC 27030 Permitted Flow: 0.002 MGD Discharge Point: 100' east of the water plant at the tree line, and eventually into an unnamed tributary to Rutledge Creek in the Yadkin — Pee Dee River Basin. Snow Hill Subdivision — Well # 1 — NCO088617 Location: Snow Hill Drive, Dobson, NC 27017 Permitted Flow: 0.00252 MGD Discharge Point: Approximately 100' south of the water plant into a field, and eventually into an unnamed tributary to Cody Creek, class "C" waters in the Yadkin — Pee Dee River Basin. Windgate Subdivision — Well # 1 — NCO088609 Location: Simmons Road, Dobson, NC 27017 Permitted Flow: 0.00168 MGD Discharge Point: 100' southwest of the water plant, and eventually into an unnamed tributary to the Fisher River, class "C" waters in the Yadkin — Pee Dee River Basin. Pine Lakes Subdivision — Well # 2 — NCO088854 Location: Gloria Road, Mount Airy, NC 27030 Permitted Flow: 0.002 MGD Discharge Point: The equipment for the greensand filtration has recently been installed. All of these sites appeared to be clean and well maintained. No problems or concerns were noted.Should you have any questions concerning this report, please contact Gary Hudson or me at (336) 776-9800. Sincerely, Sherri V. Knight, P.E. Regional Supervisor Page# 3 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 Permit: NCO088552 Inspection Date: 11/06/2018 Division of Water Resources cc: Central Files WSRO Owner - Facility: Colonial Woods Subdivision - Wells #1 & #2 Inspection Type: Compliance Evaluation Water Quality Regional Operations Page# DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 Permit: NCO088552 Inspection Date: 11/06/2018 Other Comment: See Summary Owner - Facility: Colonial Woods Subdivision - Wells #1 & #2 Inspection Type: Compliance Evaluation Yes No NA NE Page# DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators MAXIMUM DATA POINTS = 58 REQUIRED DATA ENTRY Table 1. Project Information ❑ CHECK IF HQW OR ORW WQS Facility Name Colonial Woods Subdivision -Well #1 WWTP/WTP Class PCNC NPDES Permit NCO088552 Outfall 001 Flow, Qw (MGD) 0.001 Receiving Stream UT to Bull Creek HUC Number 030401010903 Stream Class C ❑ Apply WS Hardness WQC 7Q10s (cfs) 0.00 0.00 7Q10w (cfs) 0.00 30Q2 (cfs) QA (cfs) 0.00 1Q10s (cfs) 0.00 JL Effluent Hardness 46.76 mg/L (Avg) Upstream Hardness 8.34 mg/L (Avg) Combined Hardness Chronic 46.76 mg/L Combined Hardness Acute 46.76 mg/L Date includeds: BIMS Data X 014 to C 2018, flow data Nov2015 to Oct2018; default hardness. For 02/22/2017 & 05/09/2017 Zn data (in red) the UoM was reported as ug/I; therefore, it is assumed that the permittee intended to report mg/I. Data Source(s) El CHECK TO APPLY MODEL With exclusion of this date (by error: number must be >0.1 ug/I),the max pred Cw the is 114.6 ug/I (no RP). Follow directions for data entry. In some cases a comment menu list the available choices or a dropdown menu will provide a list you may select from. Error message occur if data entry does not meet input criteria. Par01 Par02 Par03 Par04 Par05 Par06E Par07 Par08 Par09 Par10 Par11 Par12 Par13 Par14 Par15 Par16 Par17 Par18 Par19 Par20 Par21 Par22 Par23 Par24 Par25 Table 2. Parameters of Concern Name wQs Type Chronic Modifier Acute PCL Units Arsenic Aquactic Life C 150 FW 340 5 ug/L Arsenic Human Health Water Supply C 10 HH/WS N/A 5 ug/L Beryllium Aquatic Life NC 6.5 FW 65 ug/L Cadmium Aquatic Life NC 0.9470 FW 5.5954 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 196.6124 FW 1511.4792 ug/L Chromium VI Aquatic Life NC 11 FW 16 pg/L Chromium, Total Aquatic Life NC N/A FW N/A 5 pg/L Copper Aquatic Life NC 13.4564 FW 18.8906 5 ug/L Cyanide Aquatic Life NC 5 FW 22 10 ug/L Fluoride Aquatic Life NCI 1,800 FW ug/L Lead Aquatic Life NC 5.9279 FW 152.1206 ug/L Mercury Aquatic Life NC 12 FW 0.5 ng/L Molybdenum Human Health NC 2000 HH ug/L Nickel Aquatic Life NC 63.2361 FW 569.3402 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 0.8702 ug/L Zinc Aquatic Life NC 215.4276 FW 213.6798 10 ug/L NCO088552 001 RPA 2019, input 7/5/2019 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 REASONABLE POTENTIAL ANALYSIS H1 H2 Use "PASTE SPECIAL Effluent Hardness Values" then "COPY" . Maximum data points = 58 Date Data BDL=1/2DL Results 1 6/24/2019 45.6 45.6 Std Dev. 2 6/25/2019 45.6 45.6 Mean 3 6/26/2019 48.5 48.5 C.V. (default) 4 6/27/2019 47.5 47.5 n 5 6/28/2019 46.6 46.6 10th Per value 6 Average Value 7 Max. Value 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 Upstream Hardness Use "PASTE SPECIAL Values" then'Cop Y" . Maximum data points = 58 Date Data BDL=1/2DL Results 1.2542 1 6/24/2019 9.70 9.7 Std Dev. 1.1025 46.7600 2 6/25/2019 8.73 8.73 Mean 8.3440 0.6000 3 6/26/2019 8.73 8.73 C.V. (default) 0.6000 5 4 6/27/2019 7.76 7.76 n 5 45.60 mg/L 5 6/28/2019 6.80 6.8 10th Per value 7.18 mg/L 46.76 mg/L 6 Average Value 8.34 mg/L 48.50 mg/L 7 Max. Value 9.70 mg/L 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 NCO088552 001 RPA 2019, data 2- 7/5/2019 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 REASONABLE POTENTIAL ANALYSIS Par21 Use "PASTE SPECIAL Zinc Values" then "COPY" . Maximum data points = 58 Date Data BDL=1/2DL Results 1 9/22/2014 14 14 Std Dev. 19.3060 2 10/8/2014 < 10 5 Mean 22.7059 3 2/24/2015 < 10 5 C.V. 0.8503 4 6/2/2015 23 23 n 17 5 9/29/2015 34 34 6 10/27/2015 44 44 Mult Factor = 1.62 7 2/24/2016 30 30 Max. Value 67.0 ug/L 8 5/24/2016 28 28 Max. Pred Cw 108.5 ug/L 9 8/9/2016 35 35 10 11/15/2016 23 23 11 2/22/2017 53 53 12 5/9/2017 < 10 5 13 8/22/2017 < 10 5 14 11/21/2017 < 10 5 15 1/9/2018 67 67 16 4/17/2018 < 10 5 17 10/9/2018 < 10 5 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 NCO088552 001 RPA 2019, data 3 - 7/5/2019 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 Colonial Woods Subdivision -Well #1 NCO088552 Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators MAXIMUM DATA POINTS = 58 Ow (MGD) = 0.00 WWTP/WTP Class: PCNC 1Q10S (cfs) = 0.00 1WC% 1Q10S = 100 7Q10S (cfs) = 0.00 1WC% 7Q10S = 100 7Q10W (cfs) = 0.00 1WC% 7Q10W = 100 30Q2 (cfs) = 0.00 1WC% (&, 30Q2 = 100 Avg. Stream Flow, QA (cfs) = 0.00 fW%C (& QA = 100 Receiving Stream: UT to Bull Creek HUC 030401010903 Stream Class: C Outfall 001 Qw = 0.001 MGD COMBINED HARDNESS (ma/L) Acute = 46.76 mg/L Chronic = 46.76 mg/L PARAMETER TYPE (1) NC STANDARDS OR EPA CRITERIA a y F D REASONABLE POTENTIAL RESULTS RECOMMENDED ACTION Applied Chronic Acute n # Det. Max Pred Cw Allowable Cw Standard Acute: 213.7 No RP , Predicted Max >_ 50% of Allowable Cw - Zinc NC 215.4276 FW 213.6798 10 ug/L 17 10 108.5 apply Quarterly Monitoring Chronic 215.4 No RP ,Predicted Max >_ 50 % of Allowable Cw - No value > Allowable Cw apply Quarterly Monitoring NCO088552 001 RPA 2019, rpa Page 4 of 5 7/5/2019 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 Date: 7/5/2019 FACILITY: Colonial Woods Subdivision -Well #1 Outfall 001 NPDES PERMIT: NC0088552 Dissolved to Total Metal Calculator In accordance with Federal Regulations, permit limitations must be written as Total Metals per 40 CFR 122.45(c) Receiving Receiving Rec. Stream NPDES Total Suspended Combined nstream Instream Effluent Stream Stream Solids Hardness Wastewater Wastewater Upstream Hardness summer summer7Q10 1Q10 Flow Limit -Fixed Value- chronicConcentration M Concentration Hardness Average 7Q10 (CFS) (MGD) [MGD] [MGD] (mg/L) (mg/L) (Chronic) (Acute) Average (mg/L) (mg/L) 0.0000 0.0000 0.0000 0.0010 10 46.760 46.760 100.0000 100.0000 8.344 46.76 Upstream Hard Avg (mg/L) = 8.344 EFF Hard Avg (mg/L) = 46.76 ENTS (identify parameters to PERCS Branch to maintain in facility's LTMP/STMP): PARAMETER Dissolved Metals Translators- using Default Partition Coefficients (streams) (MAEC) as a Total Metal =Dissolved Metal Translator Chronic Acute Chronic Acute u /I u /I u /I u /I Cadmium (d) 0.24 1.41 0.252 0.95 5.60 Cd -Trout streams 0.24 0.88 0.252 0.95 3.48 Chromium III (d)(h) 40 306 0.202 196.61 1511.48 Chromium VI (d) 11 16 1.000 11.00 16.00 Chromium, Total (t) N/A N/A Copper (d)(h) 4.7 6.6 0.348 13.46 18.89 Lead (d)(h) 1.09 28 0.184 5.93 152.12 Nickel (d)(h) 27 246 0.432 63.24 569.34 Ni - WS streams (t) 5 N/A Silver (d)(h,acute) 0.06 0.87 1.0001 0.06 0.87 Zinc (d)(h) 62 621 0.2881 215.43 213.68 Beryllium 1 6.51 1.0001 6.51 65 Arsenic (d) 150 Emd 1.0001 0 1501 0 340 (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. DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators MAXIMUM DATA POINTS = 58 REQUIRED DATA ENTRY Table 1. Project Information ❑ CHECK IF HQW OR ORW WQS Facility Name Colonial Woods Subdivision - Well #2 WWTP/WTP Class PCNC NPDES Permit NCO088552 Outfall 002 Flow, Qw (MGD) 0.001 Receiving Stream UT to Bull Creek HUC Number 030401010903 Stream Class C ❑ Apply WS Hardness WQC 7Q10s (cfs) 0.00 0.00 7Q10w (cfs) 30Q2 (cfs) 0.00 0.00 QA (cfs) 0.00 1Q10s (cfs) Effluent Hardness 40.14 mg/L (Avg) Upstream Hardness 8.34 mg/L (Avg) -------------------- Combined Hardness Chronic 40.14 mg/L Combined Hardness Acute 40.14 mg/L BIMS Data May2014 to Oct2018; flow data Nov2015 to Oct2018; default hardness Data Source(s) ❑ CHECK TO APPLY MODEL Follow directions for data entry. In some cases a comment menu list the available choices or a dropdown menu will provide a list you may select from. Error message occur if data entry does not meet input criteria. Par01 Par02 Par03 Par04 Par05 Par06E Par07 Par08 Par09 Par10 Par11 Par12 Par13 Par14 Par15 Par16 Par17 Par18 Par19 Par20 Par21 Par22 Par23 Par24 Par25 Table 2. Parameters of Concern Name wQs Type Chronic Modifier Acute PCL Units Arsenic Aquactic Life C 150 FW 340 5 ug/L Arsenic Human Health Water Supply C 10 HH/WS N/A 5 ug/L Beryllium Aquatic Life NC 6.5 FW 65 ug/L Cadmium Aquatic Life NC 0.8438 FW 4.8978 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 173.5056 FW 1333.8433 ug/L Chromium VI Aquatic Life NC 11 FW 16 pg/L Chromium, Total Aquatic Life NC N/A FW N/A 5 pg/L Copper Aquatic Life NC 11.8108 FW 16.3599 5 ug/L Cyanide Aquatic Life NC 5 FW 22 10 ug/L Fluoride Aquatic Life NCI 1,800 FW ug/L Lead Aquatic Life NC 5.0014 FW 128.3437 ug/L Mercury Aquatic Life NC 12 FW 0.5 ng/L Molybdenum Human Health NC 2000 HH ug/L Nickel Aquatic Life NC 55.5748 FW 500.3622 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 0.6692 ug/L Zinc Aquatic Life NC 189.2901 FW 187.7543 10 ug/L NCO088552 002 RPA 2019 2, input 7/5/2019 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 REASONABLE POTENTIAL ANALYSIS H1 H2 Use "PASTE SPECIAL Effluent Hardness Values" then "COPY" . Maximum data points = 58 Date Data BDL=1/2DL Results 1 6/24/2019 39.7 39.7 Std Dev. 2 6/25/2019 39.8 39.8 Mean 3 6/26/2019 41.7 41.7 C.V. (default) 4 6/27/2019 38.8 38.8 n 5 6/28/2019 40.7 40.7 10th Per value 6 Average Value 7 Max. Value 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 Upstream Hardness Use "PASTE SPECIAL Values" then'Cop Y" . Maximum data points = 58 Date Data BDL=1/2DL Results 1.1014 1 6/24/2019 9.70 9.7 Std Dev. 1.1025 40.1400 2 6/25/2019 8.73 8.73 Mean 8.3440 0.6000 3 6/26/2019 8.73 8.73 C.V. (default) 0.6000 5 4 6/27/2019 7.76 7.76 n 5 39.16 mg/L 5 6/28/2019 6.80 6.8 10th Per value 7.18 mg/L 40.14 mg/L 6 Average Value 8.34 mg/L 41.70 mg/L 7 Max. Value 9.70 mg/L 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 NCO088552 002 RPA 2019 2, data 2- 7/5/2019 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 REASONABLE POTENTIAL ANALYSIS Par21 Use "PASTE SPECIAL Zinc Values" then "COPY" . Maximum data points = 58 Date Data BDL=1/2DL Results 1 9/29/2015 67 67 Std Dev. 35.3305 2 10/27/2015 44 44 Mean 43.3333 3 2/24/2016 87 87 C.V. 0.8153 4 5/24/2016 101 101 n 12 5 8/9/2016 91 91 6 2/22/2017 35 35 Mult Factor = 1.87 7 5/9/2017 30 30 Max. Value 101.0 ug/L 8 8/22/2017 12 12 Max. Pred Cw 188.9 ug/L 9 11/21/2017 < 10 5 10 1/9/2018 38 38 11 4/17/2018 < 10 5 12 10/9/2018 < 10 5 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 NCO088552 002 RPA 2019 2, data 3 - 7/5/2019 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 Colonial Woods Subdivision - Well #2 NCO088552 Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators MAXIMUM DATA POINTS = 58 Ow (MGD) = 0.00 WWTP/WTP Class: PCNC 1Q10S (cfs) = 0.00 1WC% 1Q10S = 100 7Q10S (cfs) = 0.00 1WC% 7Q10S = 100 7Q10W (cfs) = 0.00 1WC% 7Q10W = 100 30Q2 (cfs) = 0.00 1WC% (&, 30Q2 = 100 Avg. Stream Flow, QA (cfs) = 0.00 fW%C (& QA = 100 Receiving Stream: UT to Bull Creek HUC 030401010903 Stream Class: C Outfall 002 Qw = 0.001239 MGD COMBINED HARDNESS (ma/L) Acute = 40.14 mg/L Chronic = 40.14 mg/L PARAMETER TYPE h) NC STANDARDS OR EPA CRITERIA a y F D REASONABLE POTENTIAL RESULTS RECOMMENDED ACTION Chronic AcuteApplied n # Det. Max Pred Cw Allowable Cw Standard Acute: 187.8 RP shown - apply Monthly Monitoring with Limit Zinc NC 189.2901 FW 187.7543 10 ug L 12 9 188.9 _ _ _ _ --Ch---- - ronic—189.3 --------------------------- RP shown - apply Monthly Monitoring with Limit No value > Allowable Cw NCO088552 002 RPA 2019 2, rpa Page 4 of 5 7/5/2019 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 Date: 7/5/2019 FACILITY: Colonial Woods Subdivision - Well #2 Outfall 002 NPDES PERMIT: NC0088552 Dissolved to Total Metal Calculator In accordance with Federal Regulations, permit limitations must be written as Total Metals per 40 CFR 122.45(c) Receiving Receiving Rec. Stream NPDES Total Suspended Combined nstream Instream Effluent Stream Stream Solids Hardness Wastewater Wastewater Upstream Hardness summer summer7Q10 1Q10 Flow Limit -Fixed Value- chronicConcentration M Concentration Hardness Average 7Q10 (CFS) (MGD) [MGD] [MGD] (mg/L) (mg/L) (Chronic) (Acute) Average (mg/L) (mg/L) 0.0000 0.0000 0.0000 0.0012 10 40.140 40.140 100.0000 100.0000 8.344 40.14 Upstream Hard Avg (mg/L) = 8.344 EFF Hard Avg (mg/L) = 40.14 ENTS (identify parameters to PERCS Branch to maintain in facility's LTMP/STMP): PARAMETER Dissolved Metals Translators- using Default Partition Coefficients (streams) (MAEC) as a Total Metal =Dissolved Metal Translator Chronic Acute Chronic Acute u u /I u /I u /I Cadmium (d) 0.21 1.24 0.252 0.84 4.90 Cd -Trout streams 0.21 0.77 0.252 0.84 3.05 Chromium III (d)(h) 35 270 0.202 173.51 1333.84 Chromium VI (d) 11 16 1.000 11.00 16.00 Chromium, Total (t) N/A N/A Copper (d)(h) 4.1 5.7 0.348 11.81 16.36 Lead (d)(h) 0.92 24 0.184 5.00 128.34 Nickel (d)(h) 24 216 0.432 55.57 500.36 Ni - WS streams (t) N/A Silver (d)(h,acute) 0.06 0.671 1.0001 0.06 0.67 Zinc (d)(h) 55 541 0.2881 189.29 187.75 Beryllium 1 6.51 1.0001 6.51 65 Arsenic (d) 1501 1 1 1.0001 0 1501 0 340 (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. DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 Permit No. NC0088552 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/1 (Dissolved) Chronic SW, µg/1 (Dissolved) Arsenic 340 150 69 36 Beryllium 65 6.5 --- --- Cadmium Calculation Calculation 40 8.8 Chromium III Calculation Calculation --- --- Chromium VI 16 11 1100 50 Copper Calculation Calculation 4.8 3.1 Lead Calculation Calculation 210 8.1 Nickel Calculation Calculation 74 8.2 Silver Calculation 0.06 1.9 0.1 Zinc Calculation Calculation 90 81 Table 1 Notes: 1. FW= Freshwater, SW= Saltwater 2. Calculation = Hardness dependent standard 3. Only the aquatic life standards listed above are expressed in dissolved form. Aquatic life standards for Mercury and selenium are still expressed as Total Recoverable Metals due to bioaccumulative concerns (as are all human health standards for all metals). It is still necessary to evaluate total recoverable aquatic life and human health standards listed in 15A NCAC 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/1 Cadmium, Acute WER*{1.136672-[ln hardness](0.041838)} - e^{0.9151 [In hardness]-3.14851 Cadmium, Acute Trout waters WER*{1.136672-[ln hardness](0.041838)1 - e^{0.9151[In hardness]-3.6236} Cadmium, Chronic WER* { 1.101672-[ln hardness](0.041838)1 - of 0.7998[ln hardness]-4.4451 } Chromium III, Acute WER*0.316 eA fO.8190[ln hardness]+3.7256} Chromium III, Chronic WER*0.860 e^{0.8190[ln hardness]+0.6848} Copper, Acute WER*0.960 eA fO.9422[ln hardness]- 1. 7001 Copper, Chronic WER*0.960 eA fO.8545[ln hardness]-1.7021 Lead, Acute WER*{1.46203-[ln hardness](0.145712)1 • of 1.273[ln hardness]-1.4601 Lead, Chronic WER*{1.46203-[ln hardness](0.145712)1 • of 1.273[ln hardness]-4.7051 Nickel, Acute WER*0.998 eA fO.8460[ln hardness]+2.255} Nickel, Chronic WER*0.997 eA10.8460[ln hardness]+0.0584} Page 1 of 4 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 Permit No. NCO088552 Silver, Acute WER*0.85 • e^{1.72[ln hardness]-6.59} Silver, Chronic Not applicable Zinc, Acute WER*0.978 eA10.8473[ln hardness]+0.8841 Zinc, Chronic WER*0.986 eA10.8473[ln hardness]+0.8841 General Information on the Reasonable Potential Analysis (RPA) The RPA process itself did not change as the result of the new metals standards. However, application of the dissolved and hardness -dependent standards requires additional consideration in order to establish the numeric standard for each metal of concern of each individual discharge. The hardness -based standards require some knowledge of the effluent and instream (upstream) hardness and so must be calculated case -by -case for each discharge. Metals limits must be expressed as `total recoverable' metals in accordance with 40 CFR 122.45(c). The discharge -specific standards must be converted to the equivalent total values for use in the RPA calculations. We will generally rely on default translator values developed for each metal (more on that below), but it is also possible to consider case -specific translators developed in accordance with established methodology. RPA Permitting Guidance/WOBELs for Hardness -Dependent Metals - Freshwater The RPA is designed to predict the maximum likely effluent concentrations for each metal of concern, based on recent effluent data, and calculate the allowable effluent concentrations, based on applicable standards and the critical low -flow values for the receiving stream. If the maximum predicted value is greater than the maximum allowed value (chronic or acute), the discharge has reasonable potential to exceed the standard, which warrants a permit limit in most cases. If monitoring for a particular pollutant indicates that the pollutant is not present (i.e. consistently below detection level), then the Division may remove the monitoring requirement in the reissued permit. To perform a RPA on the Freshwater hardness -dependent metals the Permit Writer compiles the following information: • Critical low flow of the receiving stream, 7Q10 (the spreadsheet automatically calculates the 1 Q 10 using the formula 1 Q 10 = 0.843 (s7Q 10, CA) 0.993 • Effluent hardness and upstream hardness, site -specific data is preferred • Permitted flow • Receiving stream classification 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 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 Permit No. NCO088552 The overall hardness value used in the water quality calculations is calculated as follows: Combined Hardness (chronic) _ (Permitted Flow, cfs *Avg. Effluent Hardness, mg/L) + (s7Q10, cfs *Avg. Upstream Hardness, mg/L) (Permitted Flow, cfs + s7Q10, cfs) The Combined Hardness for acute is the same but the calculation uses the 1Q10 flow. 3. The permit writer converts the numeric standard for each metal of concern to a total recoverable metal, using the EPA Default Partition Coefficients (DPCs) or site -specific translators, if any have been developed using federally approved methodology. EPA default partition coefficients or the "Fraction Dissolved" converts the value for dissolved metal at laboratory conditions to total recoverable metal at in -stream ambient conditions. This factor is calculated using the linear partition coefficients found in The Metals Translator: Guidance for Calculating a Total Recoverable Permit Limit from a Dissolved Criterion (EPA 823-B-96-007, June 1996) and the equation: Cdiss - 1 Ctotal I + { [KPO] [SS(I+a)] [10-6] i 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 (le. 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 = (s7Q10 + 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 s7Q10) s7Q10 = 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 s7Q10 may be incorporated as applicable: IQ10 = used in the equation to protect aquatic life from acute toxicity Page 3 of 4 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 Permit No. NC0088552 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 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 40.14 mg/1 Effluent and upstream Hardness data for (mg/L) 06/24/2019 to 06/28/2019 received [Total as, CaCO3 or (Ca+Mg)] from Aqua on July 2, 2019. Average Upstream Hardness 8.344 mg/1 Effluent and upstream Hardness data for (mg/L) 06/24/2019 to 06/28/2019 received [Total as, CaCO3 or (Ca+Mg)] from Aqua on July 2, 2019. 7Q10 summer (cfs) 0 BIMS, NPDES Permit Files 1Q10 (cfs) 0 BIMS, NPDES Permit Files Permitted Flow (MGD) Not Limited Used maximum monthly average of 0.001239 MGD (Nov2015 to Oct20I8) Date: July 5, 2019 Permit Writer: Derek Denard Page 4 of 4 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 IV PER-HUDE1,TLOP MENT FOR GREENSAND F"TER TREATM ENT PLANTS 4.1 Background The following penrutting strategy applies to new and existing water treatment plants using greensand filtration to generate potable water from groundwater. This categorization would also include many community well systems, "iron filters", and "manganese filters" as long as they do not back -wash filters with a sodium solution. The permit writer should contact the facility to verify that there is not a briny discharge. This permitting strategy does not apply to any other kind of cationic exchange unit used in water treatment. If any portion of the water treatment process includes an ion exchange/water softener unit, then the RO-IE Permitting Strategy will apply as well. Typically, a greensand filtration unit is preceded by the use of an aeration tower along with potassium permanganate to oxidize dissolved iron in the ground water. The particulate ferric hydroxide (and some minor quantities of soluble ferrous material) is then removed. via filtration through a manganese based greensand media. Greensand is a proprietary material that does not require sodium cycle regeneration, only backwash with finished (potable) water. Since the discharge from such a facility is not as saline as that :from a sodium cycle cationic exchange unit, this may be considered a more erivironinentally friendly technology for the treatment of groundwater. For that reason, unlike other types of ion exchange systems, non -discharge options are sometimes an alternative and should be explored for new permits. Filter backwash water is usually collected in a settling basin, and the supernatant is then discharged to surface waters or a. regional treatment works. 4.2 Pollutants of Concern Typical chemical additives to such treatment systems are an anti-scalant (such as zinc orthophosphate), fluoride, chlorine and potassium permanganate. lame 4.1:.cuonitortne Keauirements -ror (Yreensana wiry The monitoring requirements included below identify various pollutants of concern including conventional parameters, nutrients, and toxicants. A brief rationale for the inclusion of these contaminants can be found in Appendix A. Other toxicants were not included because they were either not detected or rarely detected in the effluent data surveyed. However, if a pollutant specific problem is detected in the receiving stream, effluent, or source water then a monitoring requirement may be added for that parameter. Likewise, if data indicate that a pollutant is not present in the facility's discharge, that parameter may be dropped from the requirements. Limits should be added if the facility shows reasonable potential to exceed water quality standards for toxicants. New facilities should monitor for pollutants of concerns regardless of whether or not there is a water quality standard. Monitoring requirements can be re-evaluated during subsequent renewals. EFFLUENT CHARACTERISTICS LIMITS MONITORING REQ1111ZEMENTS nthly Monthly Averaage, S D Daily Maximum Measurement e uenvy Sample Tvp.- Sample Location Flow See footnote Instantaneous or Estimate Effluent Total Suspended Solids 30.0 mg/L 45.0 mg/L See footnote' Grab Effluent pH Freshwater: 6.0 - 9.O s,u, Saltwater: 6.8 - 8.5 s.u. See footnote3 Grab Effluent Total Residual Chlorine2 Freshwaters: 17- 28 pg/L Saltwater: 13 L!E�L See footnote-3 Grab Effluent Turbidity4 See footnote3 Grab Effluent Fluoride' Limit based on potential Quarterly Grab Effluent Total Iron Limit based on potential Quarterly Grab Effluent Total Zinc6 Limit based on potential Quarterly Grab Effluent Total Manganese Limit based on potential Quarterly Grab Effluent Notes to permit writers: 1. For instantaneous flow monitoring, the duration of the discharge must be reported in addition to the total flow. The monitoring frequency for flow should be as frequent as the minimum frequency of monitoring for any parameter listed. 2. Footnote for permit: Limit and monitor only if the facility adds chlorine or chlorine derivatives to water that is eventually discharged. The Division shall consider all effluent TRC values reported below 50 ug/I 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 ug/l. S. Monitor 2/month if discharge is < O5 MGD and monitor weekly if discharge is >0-5 MGD 4. If the receiving stream is impaired for turbidity a daily maximum limit should be given. See Appendix A for limit and footnote. 5. Fluoride should be monitored if the Permittee backwashes with fluoridated finished water. 6. Zinc should be monitored if the Permittee adds zinc orthophosphate as a corrosion inhibitor prior to backwashing. -7- DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 V. LUPLEMENTA TION 5.1. Monitoring Frequency In order to be consistent with the monitoring guidance employed for other permits across the state, monitoring Z:> frequencies will be based on the flow divisions used to define facility class in the 15A NCAC 08C .0302 regulations. Requirements described in 15A NCAC 2B .0508(d) for water supply plants were used as guidance. Table 5 summarizes the monitoring requirements. After sufficient data have been collected (eight to 12 data points over at least one year) the permittee may petition for a reduction in monitoring. Table 5.1: WTP Monitoring Requirements If a parameter is not currently limited hut requires a limitation based on potential, increase sainplingftequeney by one degree. (Quarterly — Monthly, Monthly— 2 Month) Conventional Parameters (except flow) Facility Class and Toxicants (Effluent and Instream) Permitted Flow < 0.5 MGD If limited - 2/Month Not limited - Monthly Permitted Flow --> 0.5 MGD If limited - Weekly Not limited - 2/Month 5.2. Wiole Effluent Toxicity Testing Membrane, ion exchange, and conventional WTPs should be required to conduct quarterly WET tests for monitoring purposes. Eventually, the Division may choose to use this data to develop additional policy. The type of WET test conducted will vary depending on receiving stream characteristics. In addition, the level of available dilution and tidal effects will determine whether the facility should perform an acute or chronic test, while the type of water (freshwater or saltwater) will determine which organism should be used. Table I summarizes WET -testing requirements. Appendix A includes sample WET language. Z� Greensand filter systems will not be required to monitor whole effluent toxicity. 7 7777777777,11, Dilution IWC < 0.25% Acute 24-hour Pass/Fail at 90% IWC �! 0.25% - Chronic test at JWC (maximum 90%) Tidal Effects I Modeled Tidal discharge Chronic test at chronic mixing zone characteristics Tidal Discharge- not modeled, Acute 24-hour Pass/Fail at 90% Freshwater Acute test organism: Fathel7d ininnoW Chronic test organism: Ceriodaphnia dubs Water Type Acute test organism: Fathead Minnow OR tv�tlsid Shrimp Saltwater OR Silverside Minnow (permittee's choice) Chronic test organism: Kysid shrifnp -2 Notes: 1. Applies to existing dischargers only. 2. Permittee may choose to conduct comparison studies showing Ceriodaphnia dubia to be greater than or equal to Alsid Shriinp in degree of sensitivity to the facility's, effluent. -8- DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 NORTH CAROLINA SURRY COUNTY AFFIDAVIT OF PUBLICATION Before the undersigned?, a Notary Public of said County and State, duly commissioned, qualified and authorized by law to administer oaths, personally appeared Sandra Hurley who being first duly sworn, deposes and says: that he (she) is Regional Publisher (Publisher or other officer or employee authorized to make affidavit) of ADAM.S PUBLISHING GROUP, LLC, engaged in the publication of a newspaper known as MOUNT AIRY NEWS, published, issued, and entered as periodicals class snail in the city of Mount Airy in said County and State; that he (she) is authorized to make this affidavit and sworn statement; that the notice or other legal advertisement, a true copy of which is attached hereto, was published in MOUNT AIRY NEWS on the following dates: Iff1L'i • and that the said newspaper in which such notice, paper, document or legal advertisement was published was, at the timeofeach and every such publication, a newspaper meeting all of the requirements and qualifications of Section 1-597 of the General Statutes of North Carolina and was a qualified newspaper within the meaning of Section 1-597 of the General Statutes of North Carolina. This l day of � �,a _, 2019 Signature of person V Sworn to and subscribed before me, this 7 day of 2019 Notary Public My Commission expires: _ .January 1 S, 2023 FERRIS W. SIMPSON NOTARY PUBLIC SURRY COUNTY, N.C. CLIPPING OF LEGAL ADVERTISEMENT ATTACHED HERE Public Notice North Carolina Environment- al Management Commission/NPDES Emit 1617 Mail Service Center Raleigh, NC 27699-1617 Notice of Intent to Issue a NPDES Wastewater Permit The North Carolina Environ- mental Management Commis- sion proposes to issue a NP- DES wastewater discharge permit to the person(s) listed below. Written comments re- garding the proposed permit will be accepted until 30 days after the publish date of this notice. The Director of the NC Division of Water Resources (DWR) may hold a public hear- ing should there be a signific- ant degree of public interest. Please mail comments and/or information requests to DWR at the above address. Inter- ested persons may visit the DWR at 512 N. Salisbury Street, Raleigh, NC to review information on file. Additional information on NPDES per- mits and this notice may be found on our website: http:l/deq. ne.gov/aboutldivi- sions/water-resources/water- resou rces-permits/wastewater- branchln Ades-wastewater/pub- lic-notices,or by calling (919) 707-3601. Aqua North Caro- lina, Inc. applied to renew NP- DES permit NCO088854 for the Pine Lakes Subdivision, Well #2 WTP, Gloria Road, Mt. Airy, Surry County, discharging fil- ter backwash to Stewarts Creek, Yadkin -Pee Dee River Basin. Aqua North Carolina, Inc. appplied to renew NPDES permit NC0088552 for the Co- lonial Woods Subdivision, Wells #1 & #2 WTP, Atkins Lane, Nit. Airy, Surry County, discharging filter backwash to Bull Creek, Yadkin -Pee Dee River Basin. Publish: 07/14/2019 70025331 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 Denard, Derek From: Boone, Ron Sent: Friday, December 07, 2018 11:32 AM To: Denard, Derek; Hudson, Gary Cc: Knight, Sherri Subject: RE: Aqua North Carolina Inc. - Greensand WTP Renewals/Transfers to coverage under NCG590000 I don't have a problem with Stonington getting the GP and have no comments about its renewal as such. I can't speak for the Surry facilities. Those are Gary's. Ron Best Regards, Ronald C. Boone, Environmental Program Consultant NC Department of Environmental Quality, Division of Water Resources, Water Quality Regional Operations Section, Winston-Salem Regional Office 450 West Hanes Mill Road, Suite 300 Winston-Salem, NC 27105 Main: 336-776-9800 Direct: 336-776-9690 Mobile 1: 336-341-3568 Mobile 2: 336-686-4921 Fax 336-776-9797 ron.boone@ncdenr.gov http://deg.nc.gov/about/divisions/water-resources From: Denard, Derek Sent: Thursday, December 6, 2018 11:28 AM To: Hudson, Gary <gary.hudson@ncdenr.gov>; Boone, Ron <ron.boone@ncdenr.gov> Cc: Knight, Sherri <sherri.knight@ncdenr.gov> Subject: Aqua North Carolina Inc. - Greensand WTP Renewals/Transfers to coverage under NCG590000 Gary & Ron, The following is a list of Aqua greensand WTP permits that are up for renewal: Permit Owner Facility County Expires NCO088498 Aqua North Carolina, Inc. Mitchell Bluff - Well #1 Surry 12/31/2018 NCO088609 Aqua North Carolina, Inc. Windgate Subdivision Surry 1/31/2019 NCO088528 Aqua North Carolina, Inc. Hillcrest Subdivision - Well #3 Surry 12/31/2018 NCO088536 Aqua North Carolina, Inc. Bannertown Hills Subdivision - Well #2 Surry 12/31/2018 Colonial Woods Subdivision - Wells 1 NCO088552 Aqua North Carolina, Inc. and 2 Surry 1/31/2019 NCO088854 Aqua North Carolina, Inc. Pine Lakes Subdivision - Well #2 Surry 1/31/2019 NCO088617 Aqua North Carolina, Inc. Snow Hill subdivision Surry 2/28/2019 NCO088625 Aqua North Carolina, Inc. The Hollows subdivision Surry 2/28/2019 NCO088633 Aqua North Carolina, Inc. Reeves Woods Subdivision Well #2 Surry 2/28/2019 1 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 NCO088501 Aqua North Carolina, Inc. Stonington Subdivision - Well #1 Forsyth 2/28/2019 Aqua has indicated that they would like to have coverage under the general permit for these. Most likely all of them will be converted to General Permit NCG590000. Please note that conversion to the general permit will not require public notice. We should be able to process these renewals/conversions in a couple of week instead of months. I would like to knock out the 3 that expire this month by December 31. Please let me know if you have any comments or staff reports (e-mail is fine) for any of these facilities. Thanks, Derek C Denard Environmental Specialist Compliance & Expedited Permitting Unit N.C. Division of Water Resources N.C. Department of Environmental Quality 919 707 3618 office 919 707 9000 main DWR derek.denard aancdenr clov N. C. Division of Water Resources Water Quality Permitting Section - NPDES 1617 Mail Service Center Raleigh, INC 27699-1617 Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third parties. DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 Denard, Derek From: Berger, Amanda A <AAOwens@aquaamerica.com> Sent: Monday, November 11, 2019 1:22 PM To: Denard, Derek Cc: Ison, Laurie T; Pearce, Joseph R; McDaniel, David T; Hennessy, John; Boone, Ron; Graznak, Jenny; Snider, Lon Subject: RE: [EXTERNAL] 90 day extension request for NC0088501, NC0088552, NCO088854 M�Gernal email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to r Good afternoon Derek, Apologies for the late response. We have not had an opportunity to visit these sites and I do not wish to hold you up from your review. Please go ahead and begin working on these permits. Aqua did investigate the source of the zinc and determined that its source was the polyphosphate. Aqua is no longer utilizing this version of poly. The current polyphosphate formulation should not contain zinc. Let me know if you have any questions, and once again may apologies. Best regards, Amanda Berger Director of Environmental Compliance Aqua North Carolina 202 MacKenan Ct; Cary, NC 27511 0:919.653.6965 M:910.773.0406 0 From: Denard, Derek <derek.denard@ncdenr.gov> Sent: Thursday, November 07, 2019 10:58 AM To: Berger, Amanda A <AAOwens@aquaamerica.com> Cc: Ison, Laurie T <LTlson@aquaamerica.com>; Pearce, Joseph R <JRPearce@aquaamerica.com>; McDaniel, David T <DTMcDaniel@aquaamerica.com>; Hennessy, John <john.hennessy@ncdenr.gov>; Boone, Ron <ron.boone@ncdenr.gov>; Graznak, Jenny <jenny.graznak@ncdenr.gov>; Snider, Lon <lon.snider@ncdenr.gov> Subject: [EXTERNAL] 90 day extension request for NC0088501, NC0088552, NCO088854 CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe. Amanda, DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 I wanted to reach out you about the status of these permit renewals. We are past the 90 day extension request for issuance of these permits. Unless there is information you would like to add for my review, I would like to start working on these again for issuance. Please note the compliance schedules contained within the draft permits give you adequate time to resolve any issues with meeting the new metals limits. If you have any questions, please let me know. Sincerely, Derek Denard Environmental Specialist N.C. Division of Water Resources N.C. Department of Environmental Quality 919 707 3618 office 919 707 9000 main DWR derek.denard(a)ncdenr.aov 1617 Mail Service Center Raleigh, NC 27699-1617 Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third parties. From: Berger, Amanda A <AAOwens@aquaamerica.com> Sent: Monday, July 22, 2019 4:25 PM To: Denard, Derek <derek.denard@ncdenr.gov>; Hennessy, John <iohn.hennessy@ncdenr.gov> Cc: Kinney, Maureen <Maureen.Kinney@ncdenr.gov>; Boone, Ron <ron.boone@ncdenr.gov>; Ison, Laurie T <LTlson@aquaamerica.com>; Pearce, Joseph R <JRPearce@aquaamerica.com>; McDaniel, David T <DTMcDaniel @aguaamerica.com> Subject: [External] Draft Permit(s) - Comment/Request NC0088501, NC0088552, NCO088854 CAUTION:ks or open attachments unless you verify. Send all suspicious email as an attachment to rr anV Hi John and Derek, Aqua respectfully requests a 90 day extension on permit issuance for Stonington WTP (NC 0088501), Pine Lakes WTP (NC0088554), and Colonial Woods WTP (NC 0088552) to allow us time to investigate if these sites meet the conditions of the NPDES program. This will require inspection and visitation by not only Aqua staff but also the Winston Salem Regional Office. Aqua would also like to utilize this time to investigate the source of zinc that was previously reported in 2017 DMRs. We appreciate your time and consideration on this request. If you have any questions or concerns, please do not hesitate to contact me. Best regards, DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 *" ":AL e�rL4���,0 Amanda Berger Director of Environmental Compliance Aqua North Carolina 202 MacKenan Ct; Cary, NC 27511 0:919.653.6965 M:910.773.0406 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 Denard, Derek From: Boone, Ron Sent: Wednesday, July 24, 2019 9:42 AM To: Pearce, Joseph R; Berger, Amanda A; Denard, Derek; Hennessy, John Cc: Kinney, Maureen; Ison, Laurie T; McDaniel, David T Subject: RE: [External] Draft Permit(s) - Comment/Request NC0088501, NC0088552, NC0088854 That's exactly why I was questioning the intent here. Stonington has had a NPDES permit (88501) since approximately 2007 for discharge of water conditioning wastewater to Abbott's Creek. What's changed? Has the discharge been eliminated? If not, what's the purpose of revisiting, "...if these sites meet the conditions of the NPDES program"? If the discharge hasn't been eliminated, then obviously they meet the conditions and the permit is still required. As for the other two facilities in question, Pine Lakes WTP (88854) and Colonial Woods WTP (88552), 1 have never inspected those facilities but I am the NPDES program consultant in the Winston-Salem Regional Office and have not been made aware of the elimination of either of those discharges. Best Regards, Ronald C. Boone, Environmental Program Consultant NC Department of Environmental Quality, Division of Water Resources, Water Quality Regional Operations Section, Winston-Salem Regional Office 450 West Hanes Mill Road, Suite 300 Winston-Salem, NC 27105 Main: 336-776-9800 Direct: 336-776-9690 Mobile 1: 336-341-3568 Mobile 2: 336-686-4921 Fax 336-776-9797 ron.boone@ncdenr.gov http://deg.nc.gov/about/divisions/water-resources From: Pearce, Joseph R <JRPearce@aquaamerica.com> Sent: Wednesday, July 24, 2019 8:55 AM To: Boone, Ron <ron.boon e@ncdenr.gov>; Berger, Amanda A <AAOwens@aquaamerica.com>; Denard, Derek <derek.denard@ncdenr.gov>; Hennessy, John <john.hennessy@ncdenr.gov> Cc: Kinney, Maureen <Maureen.Kinney@ncdenr.gov>; Ison, Laurie T <LTlson@aquaamerica.com>; McDaniel, David T <DTMcDaniel @aquaamerica.com> Subject: RE: [External] Draft Permit(s) - Comment/Request NC0088501, NC0088552, NC0088854 • External email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to Ron, NPDES is for discharge to WOTUS, Waters of the United States. If the systems do not discharge to WOTUS, then NPDES is not the appropriate permit. Joe DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 AL f#rr L ► i�,w Joseph Pearce PE CFM Director of Operations Aqua North Carolina, Inc. 202 MacKenan Court Cary, North Carolina 27511 0:919.653.6964 F:919.460.1788 From: Boone, Ron <ron.boone@ncdenr.gov> Sent: Wednesday, July 24, 2019 8:25 AM To: Berger, Amanda A <AAOwens@aquaamerica.com>; Denard, Derek <derek.denard@ncdenr.gov>; Hennessy, John <iohn.hennessy@ncdenr.�ov> Cc: Kinney, Maureen <Maureen.Kinney@ncdenr.gov>; Ison, Laurie T <LTlson@aquaamerica.com>; Pearce, Joseph R <JRPearce@aquaamerica.com>; McDaniel, David T <DTMcDaniel@aquaamerica.com> Subject: RE: [External] Draft Permit(s) - Comment/Request NC0088501, NC0088552, NCO088854 CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe. Hello All, What exactly does it mean, "...if these sites meet the conditions of the NPDES program"? If the facilities discharge then they still require a permit. The only way to eliminate the permit is to first eliminate the discharge... Am I missing something here? Thanks, Ron Best Regards, Ronald C. Boone, Environmental Program Consultant NC Department of Environmental Quality, Division of Water Resources, Water Quality Regional Operations Section, Winston-Salem Regional Office 450 West Hanes Mill Road, Suite 300 Winston-Salem, NC 27105 Main: 336-776-9800 Direct: 336-776-9690 Mobile 1: 336-341-3568 Mobile 2: 336-686-4921 Fax 336-776-9797 ron.boone@ncdenr.gov http://deg.nc.gov/about/divisions/water-resources DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 From: Berger, Amanda A <AAOwens@aquaamerica.com> Sent: Monday, July 22, 2019 4:26 PM To: Denard, Derek <derek.denard@ncdenr.gov>; Hennessy, John <iohn.hennessy@ncdenr.gov> Cc: Kinney, Maureen <Maureen.Kinney@ncdenr.gov>; Boone, Ron <ron.boone@ncdenr.gov>; Ison, Laurie T <LTlson@aquaamerica.com>; Pearce, Joseph R <JRPearce@aquaamerica.com>; McDaniel, David T <DTMcDaniel @aguaamerica.com> Subject: [External] Draft Permit(s) - Comment/Request NC0088501, NC0088552, NCO088854 External email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to report.spam@nc or — Hi John and Derek, Aqua respectfully requests a 90 day extension on permit issuance for Stonington WTP (NC 0088501), Pine Lakes WTP (NC0088554), and Colonial Woods WTP (NC 0088552) to allow us time to investigate if these sites meet the conditions of the NPDES program. This will require inspection and visitation by not only Aqua staff but also the Winston Salem Regional Office. Aqua would also like to utilize this time to investigate the source of zinc that was previously reported in 2017 DMRs. We appreciate your time and consideration on this request. If you have any questions or concerns, please do not hesitate to contact me. Best regards, ■ Dfi -, L4t�' Amanda Berger Director of Environmental Compliance Aqua North Carolina 202 MacKenan Ct; Cary, NC 27511 0:919.653.6965 M:910.773.0406 DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 NPDES PERMIT NEW / RENEWAL DRAFT / FINAL CHECK LIST Permittee Aqua North Carolina, Inc. Facility Colonial Woods Subdivision — Wells #1 & #2 WTP Permit No. NCO088552 Stream Class C Regional Office WSRO Permit Writer Derek Denard Permit Drafting Initiated [BIMS Events] (review application for completeness) 12/06/2018 RO staff report requested [BIMS Events], sent email to: To: Hudson, Gary <gary.hudson(ancdenr.gov>; Boone, Ron <ron.boone@ncdenr.gov> Cc: Knight, Sherri <sherri.kni ht ncdenr. ov> 12/06/2018 RO staff report received [BIMS Events] Boone, Ron <ron.boone ncdenr. ov> 12/07/2018 EAA Review (new or expanding) NA Draft Permit ------------- Create/Edit GIS Map 07/19/2019(ed) Update/ Create Permit Outfall (Lat/Lon, HUC code, etc.) NA Data/RPA Review 05/06/2019 Add. Info. Requested [BIMS Events] 05/14/2019 Add. Info. Received [BIMS Events] 07/13/2019 Complete Draft Permit 07/08/2019 Draft Fact Sheet & Fact Sheet Binder 12/17/2019 Draft Cover Letter 12/17/2019 Proof Read for Peer Review 07/12/2019 Submit Cover, Permit, Map, Factsheet Binder (including Application, Add. Info.) for Peer Review by Emily Phillips 07/12/2019 Peer Review Completed: Emily Phillips 07/17/2019 Proof Read Draft for Public Notice 07/08/2019 Prepare Public Notice Statement 07/08/2019 Updated Public Notice System 07/08/2019 Submitted for Public Notice on 07/10/2019 Region comments on draft requested to (see draft to whom list): Boone, Ron <ron.boone ncdenr. ov> 07/12/2019 Region comments on draft received from: Boone, Ron <ron.boone ncdenr. ov> 07/24/2019 Draft to additional reviewers ATB [BIMS Events]: hannah.headrick ncdenr. oy; cind .a.moore ncdenr. ov NA Draft from additional reviewers ATB [BIMS Events]: NA Draft to additional reviewers WOCG [BIMS Events]: Maureen.KinneykncdenL.gov 07/12/2019 Draft from additional reviewers WOCG [BIMS Events]: Maureen.Kinneykncdenr.gQv None If stream class WS, Draft to additional reviewers PWS (see draft to whom list) [BIMS Events]: NA If stream class WS, Draft form additional reviewers PWS [BIMS Events]: NA Other agency comments re uested(see draft to whom list, for S —DMF / Shellfish)[BIMS Events]: NA NA Other agency comments received [BIMS Events]: NA NA Newspaper Notice Received add to factsheet binder -------------- DocuSign Envelope ID: C7535579-E572-455D-B02E-7ED6E2A9D8D7 Public notice published [BIMS Events] 07/14/2019 BIMS Scheduled Issuance Date [BIMS Events - automatic] 08/28/2019 Permit Effective Date for Final 02/01/2020 Expiration Date O1/31/2025 Prepare Final Permit 01/08/2020 Finalize Factsheet & Binder 01/08/2020 Prepare Final Cover Letter 01/08/2020 Final to DocuSign (proof read): 01/08/2020 Add (3) Document packages to the Envelope Page to send to John- Please upload in the following order: 1. Cover Letter, Draft Permit, Map (combined into one file), Boilerplate 2. Fact Sheet, plus supporting documents in one file (called "Fact Sheet Binder"): i. PDF copy of Application ii. RPA and supporting data sheet (see Tips section) iii. All calculations for limits iv. Emails (see Tips section) V. Any comments received vi. Affidavit of Publication (scanned copy) vii. WET testing and Monitoring summary viii. Compliance Summary ix. Any other pertinent information supervisor needs to look at 3. Copy of Previous Effective Permit (also include necessary versions) After signinE• 1. Permit writer receives an email from DocuSign that states the Document has been completed. 2. Click View Completed Documents. 3. While viewing the documents in DocuSign, click Download icon which appears above the document. Download as separate PDFs to your personal permit file folder on the H drive or OneDrive. 4. Permit writer prints and sends out 3 copies: a. To Permittee: permit, cover letter, map, boilerplate b. To NPDES File Room: cover letter, permit, map, fact sheet c. To Central Files: cover letter, permit, map, boilerplate, fact sheet 5. Permit writer imports e-copy of cover letter and final permit (signed) to Laserfiche. 6. Permit writer imports e-copy of Fact Sheet (i.e. all documents) to Laserfiche. 7. Permit writer imports WORD version of Final Permit into Sharepoint or the S: Drive under SWP-Point Source>NPDES>Permit Files> (find permit number, import your files as a file folder labeled as "permit number year", or create a file for the current renewal year and import your files into that folder) 8. Permit writer imports WORD version of Fact Sheet into Sharepoint or S: Drive. (same instructions as 97) 9. Charles processes permits as usual and puts a stapled Permittee copy in the mail basket "Already scanned in Laserfiche". Also, if stapled, Wren knows it has already been put in Laserfiche. 10. Charles puts NPDES File Room copy in the NPDES File Room. Charles gives Central Files copy of the permit to permit writer after updating BIMS to QA/QC. 11. To QA/QC: -Once Charles issues the permit in BIMS, then Permit Writer goes into BIMS>Tasks>Maintain Permit>Input Permit Number>Outfall>Highlight outfall>Select Maintain>Limits>Check that limits match what is in the permit 12. Permit writer responds via email to Charles Weaver that QA/QC is completed. 13. Permit writer puts hard copy of permit in Central Files basket at end of hall to send to Central Files. Email Final to the followinE recipients: cc: Central Files ec: NPDES Files [Laserfiche] Jenny Graznak benny.graznak&cdenr.gov] Amanda Berger [aaowensgaaquaamerica.com]