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HomeMy WebLinkAboutNC0089915_Draft Permit_20200101STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY DIVISION OF WATER RESOURCES DRAFT NPDES PERMIT TO DISCHARGE WASTEWATER UNDER THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM hi 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: 0 The Chemours Company FC, LLC ,, nt ff ,e .,*� Operate existiagwastewater treatment facilities consisting of: • influent oxidation, coagulation, and pH adjustment tank; • dual booster pumps; • ultrafiltration; • three granular activated carbon (GAC) adsorption units; • sludge pump; • polymer make down/injection system; • in -line mixer and thickener unit; • rotary fan press skid; • return filtrate pump; Discharge treated surface water M groundwalEr through Outfall 003 at the location specified on the attached map jAp the Cape ear River, class C, WS-IV water in the Cape Page 2 of 12 Permit NCO089915 Part I A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [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 OutfaH 003 (treated groundwater and surface water from Outfall 003) Such discharges shall be limited and monitored by the Permittee as specified below: PARAMETER CHARACTERISTICS EFFLUENT LIMBS MONITORING REQUIREMENTS Monthly Average FDailyMaximum Measurement Frequency Sample Type Sample' Location Flow 50050 1.58 MGD ontinuous Recording Effluent Total Monthly Flow; 82220 Monitor and Report (MG/mo) - - Monthly Recording _ _ Effluent_ _ _ or _ _ Calculation - - - - - - - Temperature (°C) 00010 See Note 2 Daily3 rob Effluent, Upstream, Downstream BOD,5-day, 20°C C0310 30.0111&0 45.0 mg/L 3Meek Composite Effluent TSS C0530 30.0 mg 45.0 mg/L Quarterly Composite Effluent Dissolved Oxygen, mg/L 00300 Weekly Grab Upstream, Downstream HFPO-DA (GenX)4 ?�?? 0_06 pg/L. - - .0_06 pg /L - -- Weekly - _ _ _Grab_ Influent, Effluent HFPO-DA (GenX) - 4ylorutor and RPporL(lb/mo)- - - - - - Monthl - - Calculation- - - -E#luent- - - HFPO-DA Ge m - - --Monitorand-R€port 4blyr) - - - - - -Annual - - Calculation- - - -Effluent- - ���? PFMOAA4 �- - - -085pg/L- - - --485}jg/L- - - - -Weekly - - - -Grab- - anfluent,-E#luent �272 PFMOAA4 - - - 4ylenitor and Report - - - - - M - - Calculation - - -Effluent- - PFMOAA4 2722 - - nitorand-Re d --AnnualW - - Calculation - - -E#luent- - PFAS compounds, ng/L See A. (5.) Grab See A. (5.) Total Phosphorus, mg/L C066 Monthly Composite Effluent Total Nitrogen, mg/L C0600 (NO2+NO3+TKN) Monthly Composite Effluent Conductivity 00094 Monthly Grab Upstream, Downstream Chronic Toxicity TGP38 See Note 5 Quarterly Composite Effluent pH 00400 Between 6.0 and 9.0 Standard Units 3Meek Grab Effluent Mercury (Method 1631 E), COMER ng/L 47.0 ng/L 6 Quarterly Grab Effluent Page 3 of 12 - - Formatted: Superscript - - Formatted: Highlight - - Formatted: Highlight Formatted Table Formatted: Highlight Formatted: Highlight - - Formatted: Highlight - - Formatted: Highlight Permit NCO089915 PARAMETER CHARACTERISTICS EFFLUENT LIMITS MONITORING REQUIREMENTS Monthly Average [DailyMaximum Measurement Frequency Sample Type Sample' Location Total Selenium 01147 40.0 Ng/L 379.8 Ng/L Monthly Composite Effluent Total Silver 01077 0.48 Ng/L 2.01 Ng/L Monthly Composite Effluent Total Cobalt 01037 23.9 Ng/L 23.9 Ng/L Monthly Composite Effluent Total Cadmium, Ng/L 01027 Quarterly Composite Effluent Total Copper, Ng/L 01042 uarterly Composite Effluent Total Cyanide, Ng/L 00720 Quarterly Composite Effluent Total Lead, Ng/L 01051 Quarterly Composite Effluent Total Thallium, Ng/L 01059 Quarter) Composite Effluent Total Hardness [as CaC031 00900 (mg/L) Quarterly mposite Effluent Notes: _Upstream monitoring shall be at the Permittee's river pump station; 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 in am monitoring requirements for conventional parameters 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 L-4euxdAvatp.rTreatment System. Effluent —"ofthe he E 4:R4mdwaterTre Sys . 1.2. The to atfluent shall be such as not t 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. 23.Daily shall be defined as every day except Saturdays, Sundays, and legal holidays. Instream temperature-, sampling shall be conducted weekly. 4. The Permittee shall remove indicator parameters HFPO-DA and PFMOAA at an efficiencv 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 complyinn 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.) 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. 'i9 _ F ,.:l:k. .. —11 nnO/ _V tU--- :-A:,., --- ,.a, --- -U ,. ,...,.1 ,.4Y':,.:,.«,... -L-11 t,- t,---A __ +L- 4.5. Chronic Toxicity (Ceriodaphnia) P/F @ 12.5%; quarterly during February, May, August, November; see condition A. (2.) of this permit. 26. This is an Annual Average limit, based on a calendar year. Page 4 of 12 Formatted: List Paragraph, Indent: Left: 0", Numbered + Level: 1 + Numbering Style: 1, 2, 3, ... + Start at: 1 + Alignment: Left + Aligned at: 0.25" + Indent at: 0.5" Formatted: List Paragraph, Indent: Left: 0", Right: 0", Numbered + Level: 1 + Numbering Style: 1, 2, 3, ... + Start at: 1 + Alignment: Left + Aligned at: 0.25" + Indent at: 0.5" Formatted: List Paragraph, Left, Indent: Left: 0", Numbered + Level: 1 + Numbering Style: 1, 2, 3, ... + Start at: 1 + Alignment: Left + Aligned at: 0.25" + Indent at: 0.5", Tab stops: Not at 0.5" Formatted: Indent: Left: 0", Numbered + Level: 1 + Numbering Style: 1, 2, 3, ... + Start at: 1 + Alignment: Left + Aligned at: 0.25" + Indent at: 0.5", Tab stops: Not at 0.5" Permit NCO089915 THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS. The facility shall develop an Operation and Maintenance Plan (Plan) to ensure maximum dry weather flow (— 610 gpm) in the channel is consistently captured and treated. sufficient volume is maintained at the dam for- 0 u-tQ11 003 that provides complete capture of the h-a-sp, flow and stor-niflow up to the hall tr-ontinont capacity of the system. 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. _- - - Formatted: Font: Times New Roman, 11 pt, Bold The facility shall complete and submit EPA Form 2C for this Outfall within 180 of commencement of the discharge. A. (2.) CHRONIC TOOat ERMIT LIMIT P/F (QUARTERLY) —OUTFACE 003 [ 15A NCAC 02B.0200] The effluent discharge sha 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 11 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 perfor a first test of any single quarter resuts in a failure or ChV below the permit limit, then multiple -co ntration 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 subm he Water Sciences Section at the address cited above. Should the permittee fail to monitor during a month in which icity monitoring is required, monitoring will be required during the following month. Assessment of toxicity compliance is based on the toxicity testing quarter, which is the three-month time interval that begins on the first day of the month in which toxicity testing is required by this permit and continues until the final day of the third month. Should any test data from this monitoring requirement or tests performed by the North Caro a Division of Water Resources indicate potential impacts to the receiving stream, this permit may be re -opened and modified to include alternate monitoring requirements or limits. AL NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism survival, minimum control organism reproduction, and appropriate environmental controls, shall constitute an invalid test and will require immediate foil®w-up testin to be completed no later than the last day of the month following the month of the initial monitoring. A. (3.) RE -OPENER CONDITION [NCGS 14 -215.3 (a) (2) and NCGS 143-215.66] This permit shall be modified, or revoked and reissued to incorporate additional texisity limitations and monitoring requirements in the e t toxicity testing or other studies indicate that detrimental effects m expected i� *' as a result of this discharge. A. (4.) ELECTRONIC RE G OF MONITORING REPORTS [G.S. 143-2151(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 11 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)] 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 eDMR an ill be required to complete the eDMR submission by printing, signing, and submitting one signed origin copy of the computer printed eDMR to the following address: NC DEQ / Division of Water Resources / Water Quality Permitting Section ATTENTION: Central Files 1617 Mail Service Center Raleigh, North Carolina 27699-1617 If a permittee is unable to use the eDMR system due to a demonstrated hardship or due to the facility being physically located in an area where less than 10 percent of the households have broadband access, then a temporary waiver from the NPDES electronic reporting requirements may be granted and discharge monitoring data may be submitted on paper DMR forms (MR 1, 1. 1, 2, 3) or alternative forms approved by the Director. Duplicate signed copies shall be submitted to the mailing address above. See "How to Request a Waiver from Electronic Reporting" section below. Regardless of the submission method, the first DMR is due on the last da of the month following the issuance of the permit or in the case of a new facility, on the last day of the month following the commencement of discharge. Starting on December 21, 2020, the permittee must el ically report the following compliance monitoring data and reports, when applicable: • Sewer Overflow/Bypass Event Reports; • Pretreatment Program Annual Reports; and • Clean Water Act (CWA) Section 316(b) Annual Reports. The permittee mays ek an electronic reporting waiver from the Division (see "How to Request a Waiver from Electronic Reporting" section below). 2. Electronic Submissions IF 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 1272(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: http s://www.federalregister.gov/documents/20l 5/l O/22/2015-24954/national-pollutant-discharge-elimination- 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 the Division or the period that the approved reporting waiver request is effective. Information on eDMR and the applic a tempora tropic reporting waiver are found on the following web page: http://deg.nc.gov/about/divisions/water-reso /edmr 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 1.)(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 eMm reporting purposes. For eDMR ubmissions, he person signing and submitting the DMR must obtain an eDMR user account and login credentials to access the eDMR system. For more information on North Carolina's eDMR system, registering for eDMR and obtaining an eDMR user account, please visit the following web page: http://deq.nc.gov/about/divisions/v�ater-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: V 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 quaked 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 [NCGS 143-215.3 (a) (2) and NCGS 143-215.66] 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 eEDMR 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 eEDMR or added as supplemental information. In addition, a complete copy of all PFAS data shall be —submitted to NPDES Permitting via email at svc deq npdes-ec@ncdenr.gov, with the Facility permit number and name in the subject heading. or submitted via mail at the address: 1617 Mail Service Center n,.te:,.t, NC 27699 1617 <40 \ Location Compounds Frequency Intake Table 3+ Lab SOP low,Monthly Full Suite (Table 3+ Lab SOP and EPA Method 537 Mod) Quarterly Influent to the otm", teF Treatment System Table 3+ Lab SOP Monthly Full suite Quarterly Outfall 003 (effluent from the n.-otm&z,.te Treatment System) Table 3+ Lab SOP Monthly Full suite Quarterly Downstream The boat ramp approximately 4500 feet downstream at Prospect Hall Landing. Table 3+ Lab SOP Monthly Full Suite _(Table 3+ Lab SOP a PA Method 537 Mod) Quarterly .............. Full Suite / Method 537 Modified Compounds: - - Formatted: Indent: Left: 0" - - Formatted: Indent: Left: 0", First line: W - Formatted: Font: 12 pt Analytical Common Chemical Name CASN Chemical Parameter Method Name Formula code HFPO-DA Hexafluoropropylene oxide 13252- C611F1103 52612 dimer acid 13-6 PEPA Perlfuoroethoxypropyl 26729- C51IF903 Table 3+ carboxylic acid 61-2 Lab SOP PFECA-G Perfluoro4- 801212- C12H9F903S isopropoxybutanoic acid 59-9 PFMOAA Perfluoro-2-methoxyacetic 674-13-5 C31IF503 52613 acid Page 9 of 12 Permit NC0089915 PFO2HxA Perfluoro(3,5-dioxahexanoic) acid 39492- 88-1 C41IF7O4 52617 PFO3OA Perfluoro(3,5,7- trioxaoctanoic) acid 39492- 89-2 C51IF9O5 52616 PFO4DA Perfluoro(3,5,7,9- tetraoxadecanoic) acid 39492- 90-5 C61IF11O6 52617 PMPA Perfluoromethoxypropyl carboxylic acid 13140- 29-9 C41IF7O3 Hydro -EVE Acid Perfluoroethoxypropanoic acid 773804- 62-9 C8H2F14O4 EVE Acid Perfluoroethoxypropionic acid 69087- 46-3 C81IF13O4 PFECA-B Perfluoror-3,6-dioxaheptanoic acid 151772- 58-6 C51IF9O4 R-EVE R-EVE N/ C8H2F12O5 PFO5DA Perfluoro-3,5,7,9,1 pentaoxadodeca id 3949 91-6 C71IF13O7 Byproduct 4 Byproduct 4 N/A C7H2F12O6S Byproduct 5 Byproduct 5 N/A C7H3F 1O7S Byproduct 6 Byproduct 6 N/A C6fl2FV04S NVHOS Perfluoroethoxy ulfonic acid 1132933- 86-86-8 C4H2F8O4S PES Perfluoroeth eonic than acid 113507- 82-7 C41IF9O4S PFESA-BPI Byproduct 1 29311- 67-9 C71IF13O5S PFESA-BP2 Byproduct 2 749836- 20-2 C7H2F14O5S 52614 PFB4.qM Perfluorobutanoic acid 375-224 C41IF7O2 PFDA Perfluorodecanoic acid 335-76-2 C10HF19O2 PFDoA Perfluorododecanoic acid 307-55-1 C121IF23O2 PFHpA Perfluoroheptanoic acid 375-85-9 C71IF13O2 PFNA Perfluorononanoic acid 375-95-1 C91IF17O2 PFOA Perfluorooctanoic acid 335-67-1 C81IF15O PFHxA Perfluorohexanoic acid 307-244 C61IF11O2 EPA PFPeA Perfluoropeptanoic acid 2706-90- 3 C51IF9O2 Method 537 Mod PFTeA Perfluorotetradecanoic acid 376-06-7 C141IF27O2 PFTriA Perfluorotridecanoic acid 72629- 94-8 C131IF25O2 PFUnA Perfluoroundecanoic acid 2058-94- 8 C111IF21O2 PFBS Perfluorobutanesulfonic acid 375-73-5 C41IF9SO PFDS Perfluorodecanesulfonic acid 335-77-3 C101IF21O3S PFHpS Perfluorohepanesulfonic acid 375-92-8 C71IF15O3S PFHxS Perfluorohexanesulfonic acid 355464 C611F13SO3 Page 10 of 12 Permit NC0089915 PFNS Perfluorononanesulfonic acid 68259- C911F1903S 12-1 PFOS Perfluorooctanesulfonic acid 1763-23- C81IF17SO3 1 PFPeS Perfluoropentanesulfonic acid 2706-91- C51IF11O3S 52610 4 10:2 FTS 10:2 fluorotelomersulfonic 120226- C12H5F21O3 acid 60-0 4:2 FTS 4:2 fluorotelomersulfonic acid 757124- C6H5F9O3S 72-4 6:2 FTS 6:2 fluorotelomersulfonic acid 27619- C8H5F13SO3 52608 97-2 8:2 FTS 8:2 fluorotelomersulfonic acid 39108- C10H5F17O3S 34-4 NEtFOSAA NEtFOSAA - 29 - C12H8F17NO4S 6 NEtPFOSA NEtPFOSA 4151-501 OH6F17NO2S 2 NEtPFOSAE NEWFOSAE 1691-99- C JIMOF17NO3S 2 NMeFOSAA NMeFOSA 2355-31- C11H6F17NO4S 9 NMePFOSA NMePFOS 31506- C9H4F17NO2S 32-8 NMePFOSAE NMePFOSAE 24448- C11H8F17NO3S Nes! 09-7 PFDOS Perfluorododecanesu onic 79780- C121IF25O3S acid 39-5 PFHxDA Perfluorohexadecanoic acid 67905- C161IF31O2 19-5 PFODA Perfluorooctadecanoi acid 16517- C181IF35O2 1� 11-6 PFOSA Perfluorooctanesulfonamide 754-91-6 C8112F17NO2S F-53B Major F-53B Major 73606- C8HC1F16O4S 19-6 F-53B Minor F-53B Minor 83329- CIOHCIF20O4S 89-9 ADONA 4,8-dioxa-3H- 958445- C7112F12O4 perfluorononanoate 44-8 NaDONA NaDONA EVS1361 DONA DONA 919005- 14-4 A. (6.) CALCULATION OF HFPO-DA & PFMOAA REMOVAL/LOADS a. The Permittee shall calculate monthly removal efficiency for HFPO-DA and PFMOAA as follows: Page 11 of 12 Where %Removal = Influent -Effluent Influent Influent = monthly average influent concentration Effluent = monthly average effluent concentration Permit NC0089915 b. The Permittee shall calculate monthly load for HFPO-DA and PFMOAA as follows: Monthly C Load = C x TMF x 8.34 Where: C = monthly average concentration for each compound (mg/L) TMF =Total Monthly Flow of wastewater discharged Burin the month (MG/month) 8.34 = conversion factor from (mg/L x MG) to pounds Annual C Load = Sum of the 12 Monthly Loads for eac compound for the calendar year c. The Permittee shall report monthly HYPO-DA and PFMOAA results 1(% removal, ng/L, and Loading (pounds/month)y in the discharge monitoring report for each month and shall report each calendar year's Annual Load results (pounds/year) with the Dece her report for that year. This can be done in comment section or as a supplemental information with the e MR. It In addition, calculations shall be submitted electronically with all PFAS data to ES Permitting via Page 12 of 12