Loading...
HomeMy WebLinkAboutNC0089915_Draft Permit_20200101 (3)STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY DIVISION OF WATER RESOURCES DRAFT NPDES PERMIT TO DISCHARGE WASTEWATER UNDER THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM In compliance with the provisions of North Carolina General Statute 143-215.1, other lawful standards and regulations promulgated and adopted by the North Carolina Environmental Management Commission, and the Federal Water Pollution Control Act, as amended, The Chemours Company FC, LLC is hereby authorized to discharge treated wastewater and stormwater from a facility located at Chemours Company- Fayetteville Works 22828 NC Highway 87 W Fayetteville Bladen County to receiving waters designated as the Cape Fear River in the Cape Fear River Basin in accordance with effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, III, and IV hereof. The permit shall become effective Month DD, 20YY. This permit and the authorization to discharge shall expire at midnight on Month DD, 20YY. Signed this day Month DD, 20YY. DRAFT S. Daniel Smith, Director Division of Water Resources By Authority of the Environmental Management Commission Permit NCO089915 SUPPLEMENT TO PERMIT COVER SHEET The exclusive authority to operate and discharge from this facility arises under the permit conditions, requirements, terms, and provisions included herein. is hereby authorized to: 1 2 The Chemours Company FC, LLC Operate wastewater treatment facilities consisting of: • influent oxidation, coagulation, and pH adjustme • dual booster pumps; • dual ultrafiltration units; • three granular activated carbon (GAC)+asorpNtioi • sludge pump; • polymer make down/injection system; • in -line mixer and thickener unit; • rotary fan press skid; • return filtrate pump;&., Discharge treated surface water, stormwater, location specified on the attached map in the CapeTAWNbW Basin; Page 2of12 t tank; ater through Outfall 003 at the River, a class C, WS-IV water Permit NCO089915 Part I A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS — OUTFALL 003 [15A NCAC 02B .0400 et seq., 02B .0500 et seq.] Facility Physical -Chemical Grade II Beginning on the effective date of this permit and lasting through the expiration date, the Permittee is authorized to discharge from Outfall 003 (treated surface water, groundwater, and stormwater) Such discharges shall be limited and monitored by the Permittee as specified below: EFFLUENT LIMITS MONITORING REQUIREMENTS PARAMETER CHARACTERISTICS Monthly Average Daily Maximum Measurement Sample Sample Frequency Type Location Flow 50050 1.58 MGD Continuous Recording Effluent Recording Total Monthly Flow 82220 Monitor and Report (MG/mo) Monthly or Effluent Calculation Effluent, Temperature (°C) 00010 See Note 2 Weekly Grab Upstream, Downstream BOD, 5-day, 20°C C0310 30.0 mg/L 45.0 mg/L Weekly Composite Effluent TSS C0530 30.0 m 45.0 mg/L Weekly Composite Effluent Dissolved Oxygen, mg/L 00300 Weekly Grab Upstream, Downstream HFPO-DA4 52612 0.06 pg/L 0.06 pg /L Weekly Grab Influent, Effluent HFPO-DA4 Monitor and Report(lb/mo) Monthly Calculation Effluent HFPO-DA4 Monitor and Report (lb/yr) Annually Calculation Effluent PFMOAA4 52613 0.85 pg/L 0.85 pg/L Weekly Grab Influent, Effluent PFMOAA4 Monitor and Report (lb/mo) Monthly Calculation Effluent PFMOAA4 Monitor and Report (lb/yr) Annually Calculation Effluent PFAS compounds, ng/L See A. (5.) Grab See A. (5.) Total Phosphorus, mg/L C0665 Monthly Composite Effluent Total Nitrogen, mg/L C0600 Monthly Composite Effluent (NO2+NO3+TKN) Conductivity 00094 Monthly Grab Upstream, Downstream Chronic Toxicity TGP3B See Note 5 Quarterly Composite Effluent pH 00400 Between 6.0 and 9.0 Standard Units 3/Week Grab Effluent Mercury (Method 1631 E), COMER 47.0 ng/L 6 Quarterly Grab Effluent ng/L Page 3 of 12 Permit NCO089915 PARAMETER CHARACTERISTICS EFFLUENT LIMITS MONITORING REQUIREMENTS Monthly Average Daily Maximum Measurement Frequency Sample Type Sample Location, Total Selenium? 01147 40.0 Hg/L 379.8 Hg/L Monthly Composite Effluent Total Silver? 01077 0.48 Hg/1-3 2.01 Hg/L Monthly Composite Effluent Total Cobalfl 01037 23.9 Hg/L 23.9 Hg/L Monthly Composite Effluent Total Cadmium, Ng/L 01027 Quarterly Composite Effluent Total Copper, Ng/L 01042 Quarterly Composite Effluent Total Cyanide, Ng/L 00720 Quarterly Composite Effluent Total Lead, Ng/L 01051 Quarterly Composite Effluent Total Thallium, Ng/L 01059 Quarterly Composite Effluent Total Hardness [as CaCO3] 00900 (mg/L) Quarterly Composite Effluent Notes: 1. Upstream monitoring shall be at the Permittee s ape Fear Rive Water Intake; downstream shall be at the boat ramp approximately 4500 feet downstream at Prospect Hall Landing. As a participant in the Middle Cape Fear River Basin Association, the instream monitoring requirements for conventional parameters (DO, temperature, and conductivity) as stated above are waived. Should your membership in the agreement be terminated, you shall notify the Division immediately and the instream monitoring requirements specified in your permit shall be reinstated. Influent — influent to the Old Outfall 002 Wastewater Treatment System. Note the Outfall 003 concentration limitations do not apply to the influent. Influent sampling is required to calculate the HFPO-DA and PFMOAA percent removal. Effluent — Outfall 003 (effluent from the Old Outfall 002 Wastewater Treatment System). 2. The temperature of the effluent shall be such as not to cause an increase in the temperature of the receiving stream of more than 2.8°C and in no case cause the ambient water temperature to exceed 32°C. 3. The existing PQL for Silver is 1.0 µg/L. Therefore, the Division shall consider all effluent Silver values reported below 1.0 µg/L to be in compliance with the Monthly Average Silver limit. 4. The Permittee shall remove indicator parameters HFPO-DA and PFMOAA at an efficiency of 99% as required by the Consent Order in order to maximally reduce PFAS loading to the Cape Fear River. The effluent limits listed above are Technology Based Effluent Limits ("TBELs") calculated to ensure a minimum of 99% removal efficiency. In addition to complying with these effluent limits the Permittee must demonstrate compliance with the 99% removal efficiency requirement by calculating monthly removal efficiency for HFPO-DA and PFMOAA pursuant to condition A. (6.). If the influent HFPO-DA or PFMOAA concentrations to the water treatment system are equal to or less than 200 ng/L and 500 ng/L, respectively then water treatment system effluent concentrations of less than the reporting limits (2 ng/L and 5 ng/L respectively) shall be considered as achieving 99% removal. The Permittee may request revision of the 99% removal efficiency requirement upon a demonstration that influent concentrations of PFAS have been reduced to such a level that 99% removal is no longer technically feasible. However, notwithstanding any such revision, Chemours shall continue to operate the Treatment System at optimal efficiency. 5. Chronic Toxicity (Ceriodaphnia) P/F @ 12.5%; quarterly during February, May, August, November; see condition A. (2.) of this permit. 6. This is an Annual Average limit, based on a calendar year. Page 4 of 12 Permit NCO089915 7. After 12 months of sampling the facility can apply for a reduction in sampling if all the sampling results demonstrate concentrations below detections level. The facility shall be employing the sufficiently sensitive test methods. THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS. The facility shall develop a Dam (collection system) Operation and Maintenance Plan (Plan) to ensure maximum dry weather flow (— 610 gpm) in the channel is consistently captured and treated. Similar efforts should be applied at the sumps/dams or other devices that will be used to capture water from the seeps. The Plan should be provided to the DEQ within 30 days of the permit issuance for review and approval. Upon approval, the Plan becomes an integral part of the permit. The facility shall complete and submit EPA Form 2C for this Outfall within 180 days of commencement of the discharge. Upon the implementation of the Old Outfall 002 treatment system pursuant to Consent Order Paragraph 12(e), Chemours shall commence pumping of groundwater from the seven existing Black Creek Aquifer monitoring wells and conveyance of such groundwater by piping to the Old Outfall 002 treatment system for treatment and discharge. The facility shall notify the DEQ in writing 15 day prior to the commencement of the pumping operation. A. (2.) CHRONIC TOXICITY PERMIT LIMIT P/F (QUARTERLY) — OUTFALL 003 [15ANCAC 02B.0200] The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to Ceriodaphnia dubia at an effluent concentration of 12.5%. The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the "North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," (Revised December 2010, or subsequent versions) or "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised December 2010, or subsequent versions). The tests will be performed during the months of February, May, August, and November. These months signify the first month of each three-month toxicity testing quarter assigned to the facility. Effluent sampling for this testing must be obtained during representative effluent discharge and shall be performed at the NPDES permitted final effluent discharge below all treatment processes. If the test procedure performed as the first test of any single quarter results in a failure or ChV below the permit limit, then multiple -concentration testing shall be performed at a minimum, in each of the two following months as described in "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -December 2010, or subsequent versions). All toxicity testing results required as part of this permit condition will be entered electronically using the Division's eDMR system for the months in which tests were performed, using the parameter code TGP3B for the pass/fail results and THP3B for the Chronic Value. Additionally, DWR Form AT-3 (original) is to be sent to the following address: North Carolina Division of Water Resources Water Sciences Section/Aquatic Toxicology Branch 1621 Mail Service Center Raleigh, NC 27699-1621 Page 5 of 12 Permit NCO089915 Or, results can be sent to the email, ATForms.ATBkncdenr.gov. Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section no later than 30 days after the end of the reporting period for which the report is made. Test data shall be complete, accurate, include all supporting chemical/physical measurements and all concentration/response data, and be certified by laboratory supervisor and ORC or approved designate signature. Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for disinfection of the waste stream. Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required, the permittee will complete the information located at the top of the aquatic toxicity (AT) test form indicating the facility name, permit number, pipe number, county, and the month/year of the report with the notation of "No Flow" in the comment area of the form. The report shall be submitted to the Water Sciences Section at the address cited above. Should the permittee fail to monitor during a month in which toxicity monito is required, monitoring will be required during the following month. Assessment of toxicity compliance is base on the toxicity testing quarter, which is the three-month time interval that begins on the first day of the month in whi toxicity testing is required by this permit and continues until the final day of the third month. Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Water Resources indicate potential impacts to the receiving s cam, this p t may be re -opened and modified to include alternate monitoring requirements or limits. NOTE: Failure to achieve test conditions as sped led in the cite documen , such as minimum control organism survival, minimum control organism reproduction, and appropriate environmental controls, shall constitute an invalid test and will require immediate follow-up testing to be completed no later than the last day of the month following the month of the mitia monitorin . A. (3.) RE- NDI [NCGS 14-215.3 (a) (2) and NCGS 143-215.66] This permit shall be modified, or revoked and reissued to incorporate additional limitations and monitoring requirements in the eSn, ity testing or othe tudies indicate that detrimental effects may be expected as a result of this discharg A. (4.) ELECTROJG OF MONITORING REPORTS [G. S. 143-215.1(b)] Federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and program reports. The final NPDES Electronic Reporting Rule was adopted and became effective on December 21, 2015. NOTE: This special condition supplements or supersedes the following sections within Part II of this permit (Standard Conditions for NPDES Permits): • Section B. (11.) Signatory Requirements • Section D. (2.) Reporting • Section D. (6.) Records Retention Page 6 of 12 Permit NC0089915 • Section E. (5.) Monitoring Reports 1. Reporting Requirements [Supersedes Section D. (2.) and Section E. (5.) (a)1 The permittee shall report discharge monitoring data electronically using the NC DWR's Electronic Discharge Monitoring Report (eDMR) internet application. Monitoring results obtained during the previous month(s) shall be summarized for each month and submitted electronically using eDMR. The eDMR system allows permitted facilities to enter monitoring data and submit DMRs electronically using the internet. Until such time that the state's eDMR application is compliant with EPA's Cross -Media Electronic Reporting Regulation (CROMERR), permittees will be required to submit all discharge monitoring data to the state electronically using eDMR0anill be required to complete the eDMR submission by printing, signing, and submitting one signed origincopy of the computer printed eDMR to the following address: NC DEQ / Division of Water Resources / Water ATTENTION: Central Files 1617 Mail Service Center Raleigh, North Carolina 27699-1617 If a permittee is unable to use the eDMR system duZTa demonstrated hardship or due to the facility being physically located in an area where less than 10 percent of the households have broadband access, then a temporary waiver from the NPDES electronic reporting requirements may be granted and discharge monitoring data may be submitted on paper DMR forms (MR 1, 1. 1, 2, 3) or alternative forms approved by the Director. Duplicate signed copies shall be submitted to the address abSe. e "How to Request a Waiver from Electronic Reporting" section below. Regardless of the submission method, the first R is du on e af the month following the issuance of the permit or in the case of a new facility, on the last day of the month following the commencement of discharge. Starting on December 21, 2020, the permittee must electronically report the following compliance monitoring data and reports, when applicable: • Se erflowBypass Event Reports; (This does not include the flow of waters over the dam of Old Outfal drainage waters from wastewater treatment due to wet weather events causing OOF2 drainage flow rates to be above dry weather flows) • Pretreatment Program Annual Reports; and • Clean Water Act (CWA) Section 316(b) Annual Reports. The permittee may seek*aectronic reporting waiver from the Division (see "How to Request a Waiver from Electronic Reporting" section below). 2. Electronic Submissions In accordance with 40 CFR 122.41(1)(9), the permittee must identify the initial recipient at the time of each electronic submission. The permittee should use the EPA's website resources to identify the initial recipient for the electronic submission. Initial recipient of electronic NPDES information from NPDES-regulated facilities means the entity (EPA or the state authorized by EPA to implement the NPDES program) that is the designated entity for receiving electronic NPDES data [see 40 CFR 127.2(b)]. Page 7 of 12 Permit NC0089915 EPA plans to establish a website that will also link to the appropriate electronic reporting tool for each type of electronic submission and for each state. Instructions on how to access and use the appropriate electronic reporting tool will be available as well. Information on EPA's NPDES Electronic Reporting Rule is found at: hups://www.federalre isg ter.gov/documents/20l5/lO/22/2015-24954/national-pollutant-discharge-climination- system-npdes-electronic-reporting-rule Electronic submissions must start by the dates listed in the "Reporting Requirements" section above. 3. How to Request a Waiver from Electronic Reporting The permittee may seek a temporary electronic reporting waiver from the Division. To obtain an electronic reporting waiver, a permittee must first submit an electronic reporting waiver request to the Division. Requests for temporary electronic reporting waivers must be submitted in writing to the Division for written approval at least sixty (60) days prior to the date the facility would be required under this permit to begin submitting monitoring data and reports. The duration of a temporary waiver shall not exceed 5 years and shall thereupon expire. At such time, monitoring data and reports shall be submitted electronically to the Division unless the permittee re -applies for and is granted a new temporary electronic reporting waiver by the Division. Approved electronic reporting waivers are not transferrable. Only permittees with an approved reporting waiver request may submit monitoring data and reports on paper to th Division r the period that the approved reporting waiver request is effective. Information on eD) following web page: reporting waiver are found on the 4. Signatory Requirements [Supplements Section B. (11.) (b) and Supersedes Section B. (11.) (d)1 All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part II, Section B. (I I.)(a) or by a duly authorized representative of that person as described in Part II, Section B. (I 1.)(b). A person, and not a position, must be delegated signatory authority for eDMR reporting purposes. For eD submissions, e person signing and %sZthe DMR must obtain an eDMR user account and login credentials to access the eDMR system. For more information on North Carolina's eDMR system, registering for MR and obtaining an eD user account, please visit the following web page: h ://de .nc. ov/abo t/divisions/water-resources/edmr Certification. Any person submitting an electronic DMR using the state's eDMR system shall make the following certification [40 CFR 122.22]. NO OTHER STATEMENTS OF CERTIFICATION WILL BE ACCEPTED: "I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fines and imprisonment for knowing violations. " Page 8 of 12 Permit NCO089915 5. Records Retention [Supplements Section D. (6.)] The permittee shall retain records of all Discharge Monitoring Reports, including eDMR submissions. These records or copies shall be maintained for a period of at least 3 years from the date of the report. This period may be extended by request of the Director at any time [40 CFR 122.41]. A. (5.) PFAS MONITORING REQUREMENTS AND ANALYTICAL METHODS [NCGS 143-215.3 (a) (2) and NCGS 143-215.661 The permittee shall monitor for PFAS compounds at the monitoring frequencies described below. The lists of compounds follow. Note that not all required compounds have eDMR parameter codes. Those with parameter codes should be reported using the applicable codes, and all other results for PFAS compounds should be reported in the comment section of the eDMR or added as supplemental information. In addition, a complete copy of all PFAS sampling results shall be submitted to NPDES Permitting via email at svc_deq npdes-ec o,ncdenr.gov, with the Facility permit number and name in the Subject heading. Permittee shall use the following anal compounds. DEQ Approved Table 3+ SOPS EPA Method 537 Modified )wing reporting limit for the PFAS Currently the PQL for HFPO-DA is 2.0 ng/L and PQL for PFMOAA is 5.0 ng/L. If the PQL for any of these compounds is lowered during the term of the permit, the facility shall use the new lower PQL for reporting. Monitoring Locati ^ndFrency Location CompoundsVr Frequency Upstream at th ermittee's Cape Table 3+ Lab SOP Monthly Full Suite (Table 3+ Lab SOP and EPA Method 537 Mod) Quarterly Fear River Wa Influent to the Treatment System Table 3+ Lab SOP Monthly Full suite (Table 3+ Lab SOP Quarterly and EPA Method 537 Mod) Outfall 003 (effluent from the Table 3+ Lab SOP Monthly Treatment System) Full suite (Table 3+ Lab SOP Quarterly and EPA Method 537 Mod) Downstream Table 3+ Lab SOP Monthly Full Suite (Table 3+ Lab SOP Quarterly The boat ramp approxim ly 4500 feet downstream at Prospect and EPA Method 537 Mod) Hall Landing. PFAS Compounds: Full Suite = Table 3+ Lab SOP + Method 537 Modified Compounds: Analytical Common Chemical Name CASN Chemical Parameter Method Name Formula code Page 9 of 12 Permit NCO089915 HFPO-DA Hexafluoropropylene oxide dimer acid 13252-13-6 C61V1103 52612 PEPA Perlfuoroethoxypropyl carboxylic acid 26729-61-2 C51V903 52618 PFECA-G Perfluoro-4-isopropoxybutanoic acid 801212-59-9 C12H9F903S 52619 PFMOAA Perfluoro-2-methoxyacetic acid 674-13-5 C31V503 52613 PF02HxA Perfluoro(3,5-dioxahexanoic) acid 39492-88-1 C41V704 52617 PF030A Perfluoro(3,5,7-trioxaoctanoic) acid 39492-89-2 C51V905 52616 PF04DA Perfluoro(3,5,7,9- tetraoxadecanoic) acid 39492-90-5 C61VII06 52615 PMPA Perfluoromethoxypropyl carboxylic acid 140-29-9 C41V703 52620 Table 3+ Lab SOP Hydro -EVE Acid Perfluoroethoxypropanoic acid 7738 W C8H2F1404 52621 EVE Acid Perfluoroethoxypropaonic acid 69087-4 C81V1304 52622 PFECA-B Perfluoror-3,6-dioxahepanoic acid 151772-58- C51V904 52626 R-EVE R-EVE N/A C81-12F1205 52640 PF05DA Perfluoro-3,5,7,9, I I - pentaoxadodecanoic acid 39492-91-6 C7HF1307 52627 Byproduct 4 Byproduct 4 N/A C71-12F1206S 52643 Byproduct 5 Byproduct 5W N/A C7H3F1107S 52644 Byproduct 6 Byproduct 6 1& N/A I 11329 -86- C61-12F1204S 52645 NVHOS & Perfluoroethoxy 14fonic acid C4H2F804S 52628 PES Perfluoroethoxyethanesulfonic acid 113507-82-7 C41V904S 52629 PFESA-BPI Byproduct 1 29311-67-9 C71VI305S 52630 PFESA-BP2 Byproduct 22!&46749836-20-2 C71-12F1405S 52614 PFBA Perfluoropuanoic aJW 375-22-4 C41V702 51522 PFDA Perfluorodecanoic acid 335-76-2 C101V1902 51627 PFDoA Perfluorododecanoic acid 307-55-1 C121V2302 51629 PFHpA Perfluoroheptanoic acid 375-85-9 C71VI302 51625 PFNA Perfluorononanoic acid 375-95-1 C91VI702 51626 PFOA Perfluorooctanoic acid 335-67-1 C81V150 51521 PFHxA Perfluorohexanoic acid 307-24-4 C61VI IO2 51624 PFPeA Perfluoropentanoic acid 2706-90-3 C51V902 51623 EPA PFTeA Perfluorotetradecanoic acid 376-06-7 C141V2702 51531 Method PFTriA Perfluorotridecanoic acid 72629-94-8 C131V2502 51630 537 Mod PFUnA Perfluoroundecanoic acid 2058-94-8 C11HF2102 51628 PFBS Perfluorobutanesulfonic acid 375-73-5 C41V9SO 52602 PFDS Perfluorodecanesulfonic acid 335-77-3 C10HF2103S 52603 PFHpS Perfluoroheptanesulfonic acid 375-92-8 C71VI503S 52604 PFHxS Perfluorohexanesulfonic acid 355-46-4 C6HF13SO3 52605 PFNS Perfluorononanesulfonic acid 68259-12-1 C91VI903S 52611 PFOS Perfluorooctanesulfonic acid 1763-23-1 C81V17SO3 52606 PFPeS Perfluoropentanesulfonic acid 2706-91-4 C51VI I03S 52610 10:2 FTS 10:2 fluorotelomersulfonic acid 120226-60-0 C12H5F2103 52631 Page 10 of 12 Permit NCO089915 4:2 FTS 4:2 fluorotelomersulfonic acid 757124-72-4 C6H5F903S 52607 6:2 FTS 6:2 fluorotelomersulfonic acid 27619-97-2 C8H5F13S03 52608 8:2 FTS 8:2 fluorotelomersulfonic acid 39108-34-4 C10H5F1703S 52609 NEtFOSAA NEtFOSAA 2991-50-6 C12H8F17N04S 51643 NEtPFOSA NEtPFOSA 4151-50-2 C10H6F17NO2S 52642 NEtPFOSAE NEtPFOSAE 1691-99-2 C12H10F17NO3S 51641 NMeFOSAA NMeFOSAA 2355-31-9 C11H6F17N04S 51644 NMePFOSA NMePFOSA 31506-32-8 C9H4F17NO2S 52641 NMePFOSAE NMePFOSAE 24448-09-7 C11H8F17NO3S 51642 PFDOS Perfluorododecanesulfonic acid 79780-39-5 C121V2503S 52632 PFHxDA Perfluorohexadecanoic acid 67905-19-5 C161V3102 52633 PFODA Perfluorooctadecanoic acid 16517-11-6 C18HF3502 52634 PFOSA Perfluorooctanesulfonamide 754-91-6 C8H2F17NO2S 51525 F-53B Major F-53B Major 73606-19-6 C8HC1F1604S 52638 F-53B Minor F-53B Minor 83329-89-9 C10HCIF2004S 52639 ADONA 4,8-dioxa-3H- perfluorononanoate 958445 4-8 C7H2F1204 52635 NaDONA Sodium 4,8-dioxa-3H- perfluorononanoate EVS136 (NOCAS_8 52) C7HF12Na04 52637 DONA 4,8-Diox H-perfluorononanoic acid 919005-14-4 C7H2F1204 52636 A. (6.) CALCULATION OF HFPO-DA & PFMOAA REMOVAL/LOADS a. The Permittee shall calculate monthly removal efficienc for HFPO-DA and PFMOAA as follows: %Removal = Inf luent-Ef f luen Influent Where: Influent = monthly average influent concentration Effluent = monthly average effluent concentration b. The Permittee shall calculate monthly load for HFPO-DA and PFMOAA as follows: Monthly Load = C x TMF x 8.34 Where: C = monthly average concentration for each compound (mg/L) TMF = Total Monthly Flow of wastewater discharged during the month (MG/month) 8.34 = conversion factor from (mg/L x MG) to pounds lqmmw Annual C Load = Sum of the 12 Monthly Loads for each compound for the calendar year c. The Permittee shall report monthly HFPO-DA and PFMOAA results [% removal (ng/L), and Loading (pounds/month)] in the discharge monitoring report for each month and shall report each calendar year's Annual Load (pounds/year) with the December report for that year. Percent removal shall be listed in the comment section of the eDMR since it has no parameter code. In addition, calculations shall be submitted electronically with all PFAS data to NPDES Permitting via email at svc_dec-npdes-ecgncdenr.gov, with the Facility permit number and name in the Subject heading. Page 11 of 12 Permit NCO089915 Page 12 of 12