ML23017A016

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Discharge Monitoring Report (Dmr), September 2022
ML23017A016
Person / Time
Site: Sequoyah  Tennessee Valley Authority icon.png
Issue date: 01/12/2023
From: Markum T
Tennessee Valley Authority
To:
Office of Nuclear Reactor Regulation, Document Control Desk
References
Download: ML23017A016 (1)
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Text

{{#Wiki_filter:TENNESSEE 1\14 VALLEY AUTHORITY Tennessee Valley Authority, Sequoyah Nuclear Plant, P.O. Box 2000, Soddy Daisy, TN 37384 January 12, 2023 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, D.C. 20555-0001

Subject:

Sequoyah Nuclear Plant, Discharge Monitoring Report (DMR), September 2022 Attached is the September 2022 DMR for Sequoyah Nuclear Plant. Respectfully, Travis R. Markum Environmental Scientist

DMR Copy of Record Permit Permit #: TN0026450 Permittee: Tennessee Valley Authority (TVA) Facility: TVA SEQUOYAH NUCLEAR PLANT (SQN) Major: Yes Permittee Address: Sequoyah Access Road, PO Box 2000 Facility Location: SEQUOYAH ACCESS ROAD Soddy Daisy, TN 37379 SODDY DAISY SODDY DAISY, TN 37379 Permitted Feature: 101 Discharge: 101-G External Outfall (no description) Report Dates & Status Monitoring Period: From 09/01/22 to 09/30/22 DMR Due Date: 10/15/22 Status: NetDMR Validated Considerations for Form Completion Primary discharge from Diffuser Pond. Principal Executive Officer First Name: Thomas

Title:

Vice President Telephone: 423-843-7001 Last Name: Marshall No Data Indicator (NODI) Form NODI: -- Parameter Monitoring Location Season Param. Quantity or Loading Quality or Concentration # of Frequency of Sample Type Code Name # NODI Qualifier Value 1 Qualifier Value 2 Units Qualifier Value 1 Qualifier Value Qualifier Value 3 Units Ex. Analysis 1 2 1 2 2 3 04 - deg RC - Recorder Sample = 41.9 99/99 - Continuous C (auto) Permit 04 - deg RC - Recorder 00010 Temperature, water deg. centigrade 1 - Effluent Gross 0 -- Req. Req Mon DAILY MX C 99/99 - Continuous (auto) Value NODI 04 - deg Sample = 28.3 99/99 - Continuous CA - CALCTD C Z - Instream Permit 04 - deg 00010 Temperature, water deg. centigrade 0 -- Req. 

                                                                                                                                                                                                                                   <=        30.5 DAILY MX C

99/99 - Continuous CA - CALCTD Monitoring Value NODI 04 - deg Sample = 2.2 99/99 - Continuous CA - CALCTD C Permit 04 - deg 00016 Temp. diff. between samp. & upstrm deg. C 1 - Effluent Gross 1 -- Req. 

                                                                                                                                                                                                                                   <=        3.0 DAILY MX C

99/99 - Continuous CA - CALCTD Value NODI RC - Recorder Sample = 1781.4 = 1787.4 03 - MGD 99/99 - Continuous (auto) Permit Req Mon MO Req Mon DAILY RC - Recorder 50050 Flow, in conduit or thru treatment plant 1 - Effluent Gross 0 -- Req. AVG MX 03 - MGD 99/99 - Continuous (auto) Value NODI Sample Permit 19 - 

                                                                                                                                                                    <=        0.027 MO AVG                                         <=        0.047 DAILY MX                              01/07 - Weekly     GR - GRAB Req.                                                                                                                                                                      mg/L 50060    Chlorine, total residual                       1 - Effluent Gross    0      --

Value B - Below Detection Limit/No B - Below Detection Limit/No NODI Detection Detection 62 - deg Sample = 1.8 99/99 - Continuous CA - CALCTD C/hr Z - Instream Permit 62 - deg 82234 Temperature rate of change deg. C/hr 0 -- Req. 

                                                                                                                                  <=         2.0 DAILY MX C/hr 99/99 - Continuous CA - CALCTD Monitoring Value NODI Sample                                                               >         100.0                                                                                        23 - %        01/30 - Monthly    CP - COMPOS Permit IC25 Static Renewal 7 Day Chronic                                                                                                                          >         69.0 MINIMUM                                                                                 23 - %        01/30 - Monthly    CP - COMPOS TRP3B                                                   1 - Effluent Gross    0      --          Req.

Chrceriodaphnia Value NODI Sample > 100.0 23 - % 01/30 - Monthly CP - COMPOS Permit IC25 Static Renewal 7 Day Chronic > 69.0 MINIMUM 23 - % 01/30 - Monthly CP - COMPOS TRP6C 1 - Effluent Gross 0 -- Req. Chrpimephales Value NODI Submission Note If a parameter row does not contain any values for the Sample nor Effluent Trading, then none of the following fields will be submitted for that row: Units, Number of Excursions, Frequency of Analysis, and Sample Type. Edit Check Errors

No errors. Comments Method Detection Limit for Total Residual Chlorine is 0.05 mg/L. Attachments Name Type Size SQN_Biomonitoring_Report_for_September_2022.pdf pdf 5628640.0 Report Last Saved By Tennessee Valley Authority (TVA) User: TRMARKUM Name: Travis Markum E-Mail: trmarkum@tva.gov Date/Time: 2022-10-11 14:23 (Time Zone: -05:00) Report Last Signed By User: TMCMUTUA Name: Tony McMutuary E-Mail: tmcmutuary@tva.gov Date/Time: 2022-10-13 15:40 (Time Zone: -05:00) 

                                
                                     
    

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METHODS

SUMMARY

Samples:

1. Sampling Point: Outfall 101. Intake
2. Sample Type: Composite
3. Sample lnfonnation:

Date Date Date (MM-DD-YY) (MM-DD-YY) Arrival Initial (MM-00-YY) Sample Time (ET) Time (ET) Temp. TRC* Time (ET) ID Collected Received (OC) (mg/L) Last Used By 09-11-22 I 0700 to 09-1 J-22 / 0823 101 09-12-22 / 1310 3.3 <0.10 09-12-22 / 0600 09-14-22 / 0809 09-11-22 I 0700 to 09- lJ-22 I 0823 Intake 09-12-22 I 13 I 0 1.4 <0.10 09-12-22 / 0600 09-14-22 / 0809 09-13-22 I 0700 to 09-15-22 / 0810 101 09-14-22 / 1253 1.1 <0,10 09-14-22 I 0600 09-16-22 I 0807 09- 13-22 / 0700 to 09-15-22 I 0810 Intake 09-14-22 / 1253 1.8 <0.10 09-14-22 / 0600 09-16-22 I 0807 09-17-22 I 0907 09-15-22 / 0700 to 101 09-16-22 / 1132 2.7, 2.8 1 <0.10 09-18-22 / 0904 09-16-22 / 0600 09-19-22 I 0806 09-1 7-22 / 0907 09-15-22 I 0700 to Intake 09- I 6-22 / 1132 3.6 <0.10 09-18-22 / 0904 09-16-22 / 0600 09-19-22 I 0806 

 *TRC = To1.al Residual Chlorine tsamples were collected in two 2.5 gallon cubitainers. Temperature was measured in each cubitainer upon arrival.
4. Sample Manipulation: Samples from Outfall 101 and intake were warmed to test temperature (25.0 +/- l.0°C) in a warm water bath.

Aliquots of Outfall IOI and Intake samples were UV-treated through a 40-watt Smart UV Sterilizer (manufactured bv Emperor Aquatics, Inc.) for 2 minutes. Page 3 of 93

Pimephales promelas Ceriodaphnia dubia Test Organisms:

1. Source: In-house Cultures In-house Cultures
2. Age: < 24-hours old < 24-hours old Test Method Summary:
1. Test Conditions: Static. Renewal Static. Renewal
2. Test Duration: 7 days Until at least 60% of control females have 3 broods
3. Control / Dilution Water: Moderately Hard Synthetic Moderately Hard Synthetic
4. Nwnber of Replicates: 1 lQ
5. Organisms per Replicate: .lQ l
6. Test Initiation: (Date/Time): 09-13-2 2 0740 ET 09-13-22 0823 ET
7. Test Termination: (Date/Time): 09-20-22 0646 ET 09-20-22 0730 ET
8. Test Temperature: Outfall I 01: Mean= 24.8°C Mean = 25.0°C (24.4 - 25.1 °C) (24.8 - 25.2°C)
9. Physical / Chemical Measurements: Alkalinity. hardness, total residual chlorine, and conductivity were measured at the laboratory in each 100% sample. Daily temperatures were measured in one replicate for each test concentration. Pre- and post-exposure test solutions were analyzed daily for pH and dissolved oxygen.

l 0. Statistics: Statistics were performed according to methods prescribed by EPA using ToxCalc version 5.0 statistical software (Tidepool Scientific Software, McKinneyville, CA). Page 4 of 93

TOXICITY TEST RESULTS (see Appendix C for Bench Sheets) I. Results of a Pimephales prome/as Chronic/ 7-day Toxicity Test (Genus species) (Type/ Duration) Conducted September 13 - 20. 2022 using effluent from Outfall 101. Test Percent Surviving Solutions (time interval used - davs) (% Effluent) 1 2 3 4 5 6 7 Control, 100 100 100 100 100 100 100 UV-treated 17.25% 100 100 100 100 100 100 100 34.5% 100 100 100 100 100 100 100 69% 100 100 100 100 100 100 100 84.5% 100 100 100 100 100 100 100 100.0% 100 100 100 100 100 100 100 Intake 100 100 100 100 100 100 100 Control, 100 100 100 100 100 100 100 Non-treated Mean Dry Weight (mg) Test Solutions (replicate number) (% Effiuent) 1 2 3 4 Mean Control, 0.731 0.647 0.737 0.762 0.719 UV-treated 17.25% 0.790 0.723 0.847 0.846 0.802 34.5% 0.780 0.685 0.771 0.762 0.750 69% 0.697 0.764 0.752 0.817 0.758 84.5% 0.728 0.768 0.830 0.776 0.776 100.0% 0.758 0.775 0.843 0.746 0.781 Intake 0.780 0.676 0.747 0.762 0.741 Control, 0.756 0.809 0.806 0.805 0.794 Non-treated IC2s Value: > 100% Calculated TU Estimates: < l .0 TUc* Permit Limit: 69% Permit Limit: 1.4 TUc 95% Confidence Limits: Upper Limit: NA Lower Limit: NA 

        *TUa= 100/LCso: TUc = 100/IC2s Page 5 of 93

TOXICITY TEST RESULTS (see Appendix C for Bench Sheets)

2. Results of a Ceriodaphnia dubia Chronic/ 7-day Toxicity Test.

(Genus species) (Type/ Duration) Conducted September 13 - 20, 2022 using effluent from Outfall IO L Percent Surviving Test {time interval used - days) Solutions 1 2 3 4 5 6 7 (% Effluent) Control 100 100 100 100 100 100 100 17.25% 100 100 100 100 100 100 100 34.5% 100 100 100 100 100 100 100 69% 100 100 100 100 100 100 100 84.5% 100 100 100 100 100 100 100 100.0% 100 100 100 100 100 100 100 Reproduction (#young/fernale/7 days) Test Solutions Data (replicate number) (% Effluent) I 2 3 4 5 6 7 8 9 10 Mean Control 33 30 30 32 30 28 31 30 32 32 30.8 17.25% 28 30 32 32 28 33 31 30 32 30 30.6 34.5% 33 35 31 34 30 33 33 35 32 30 32.6 69% 33 32 31 33 36 31 34 33 32 33 32.8 84.5% 32 38 37 34 35 36 37 32 31 37 34.9 100.0% 34 40 36 34 36 33 35 36 38 39 36.1 IC25 Value: > 100% Calculated TU Estimates: < 1.0 TUc* Permit Limit: 69% Permit Limit: 1.4 TUc 95% Confidence Limits: Upper Limit: NA Lower Limit: NA 

        *TUa= I 00/LCso: TUc = 100/ IC2s Page 6 of 93

TOXICITY TEST RESULTS (see Appendix C for Bench Sheets)

2. Results of a Ceriodaphnia dubia Chronic/ 7~day Toxicity Test.

(Genus species) (Type/ Duration) Conducted September 13 - 20. 2022 using water from Intake Percent Surviving Test (time interval used- days) Solutions l 2 3 4 5 6 7 (% Effluent) Control 100 100 100 100 100 100 100 Intake 100 100 100 100 100 100 100 Reproduction (#young/female/7 days) Test Solutions Data (replicate number) (% Effluent) 1 2 3 4 5 6 7 8 9 10 Mean Control 29 30 32 31 31 30 33 32 33 30 31. l Intake 38 34 33 32 36 37 37 37 40 31 35.5 IC2s Value: > 100% Calculated TU Estimates: < 1.0 TUc* Pe1mit Limit: N/A Pennit Limit: NIA 95% Confidence Limits: Upper Limit NA Lower Limit: NA 

        *TUa= 100/LCso: TUc = 100/ IC2s REFERENCE TO XICANT TEST RES ULTS (see Appendix A and D)

Species Date Time Duration Toxicant Results (IC2s) Pimepha/es prome/as September 13 - 20, 2022 0708 7 days KCI 0.67 g/L Ceriodaphnia dubia September 13 - 20, 2022 0800 7 days NaCl 1.09 g/L Page 7 of 93

PHYSICAL/CHEMICAL

SUMMARY

Page 8 of 93 Water Chemistry Mean Values and Ranges for UV-1rcalcd Pimephales promefas and Non-treated Ceriodnphll io d11bia, Sequoyah Nuclear Plant (SQN), Eflluc111 Outfall IOI and Intake performed September J 3-20. 2022. Test Sample ID Tcmncrntun: C°Cl Dissolved Oxv11en tme:/Ll nll (S.ll.) Cond11ct:mcc Alkalinity Hardness *Total Rcsidu11l Initial Final luililll Final Initial Finni (µmhos/cm) {mg/L CaCOJ) {mg/I. CaCOJ) C hlorine (m g/L) Conlral, 24.8 24.6 7.8 7.6 7.34 7.33 310 61 87 . Nnn-l~au:O 24 7

  • 24.9 24.-1
  • 24.7 7.7 - 7.9 7.4
  • 7.9 7.15 - 7.62 7.24
  • 7,39 296
  • 323 60 63 85 - 87 . .

CCll'lf~I, lJ\l-1rur~d 24.8 24.6 24.7

  • 24.8 24.4
  • 24.8 7.8 7.9
  • 8. l 7.7 7.5
  • 8.0 7.45 7.33 310 7.34
  • H,3 7.24
  • 7.44 299 - 3 18 60 60 61 86 85 - 87 ti J7.2S%

24,9 24.6 8,0 7-7 7.46 7.32 290 - - - 

                     .i                             24.8 - 24.9 24.4 - 24,7          7.9
  • 8.1 7.4
  • 7,9 7.34 - 7.63 1 7,4) 283
  • 304 . . - - . .

c t 3,1.S3/4 24.9 24.6 8.0 7.6 7.46 7.32 268 - - . 24.8 - 24,9 2-4.4 - 24.9 7.9 - 8,1 7.4 - 7,9 7 33 . 7.63 7.26 - 7.41 260

  • 278 - . - - . .
                     ~
                     ~               69%

24.9 24.6 !1.0 7.7 7.45 7.31 224 - . . 

                     -:::                           24,9
  • 25.0 24.6
  • 24.8 7,9 8. 1 7.5 8.0 7.30
  • 763 7.25 - 7.4 1 217 - 232 - . . - . -
                     ~

i; 25.0 24.6 8.0 7.7 7.44 7.30 204 . - - 84.5% it 24.9

  • 25.0 14.S
  • 24.9 7.9
  • 8.2 7.5
  • 8.0 7,28
  • 7.6) 7 .13
  • 7.41 197
  • 212 . - - -

2S.O 24.6 8.0 7.6 7.44 7.29 183 66 74 < 0.10 100% 25.0

  • 25 0 24.4
  • 24.9 7.9
  • 8.2 13
  • 8.0 7.27
  • 7.64 7.20 - 7 .38 178
  • 19 1 65 67 73 - 75 < O. !O * <0.10 25.0 24.6 8.0 7.7 7.44 7.30 179 66 73 <0. 10 Intake 24.8
  • 25.I 2-1.S - 24.7 7.8 * !t3 7.-+
  • 8.1 728
  • 7.62 7.20
  • 7.43 173
  • 184 65 69 71 - 1S < 0. 10 - < 0.11)

C"r,tro~. 24.8 25. 1 7.8 7.9 7.26 7.44 3 10 61 87 - Nc,n trt! *ttd 4 24.8 - 24.9 25.0 - 25.2 7,7

  • 79 7.8 - 8,0 7.15
  • 7.43 7.:l4
  • 763 296 - 323 60 63 u 87 . .

17.lS3/4 24.9 24.9 - 25.0 24.9 24.8 - 15.0 7.7 7.8 

                                                                                             -     7,9    7.8 7.9
  • 80 7.41 7-26
  • H6 7.43 7.32 - 7.63 282 -

289 295 

                     -~                                                                                                                                                             .              -                           .
                     ....s
                     -Q 34.5%

24.9 24.9

  • 2S.0 25.0 24.9 - 15.2 7.7 7.8
  • 7.9 7.9 7.8
  • 8.0 7.42 725 - 7 66 7.43 7.32
  • 7.64 261 270
  • 277 . .
a:
                     -:::             69%

25.0 25.0 7. 8 7.9 7.41 7.43 224 . - - 24.9 - 25.0 14.9

  • 15.2 7.9 7,8 - 8.0 7.21
  • 766 7.)3
  • 7.63 219
  • 233 - . . - -
                     .,,,~                                                            7.7    *
                     ~
                     -~             8 .s*;
  • 25.0 2S.0
  • 25.0 25.0 24.&
  • 25.2 7,8 7.9
  • 8.0 7.7 7,9
  • 8.1 7 41 7.42
7. 18
  • 7 66 7.32
  • 7.62 203 197
  • 208 .

25.0 24.9 7.9 1.9 7.40 7.44 183 68 75 < 0.10 100% . 69 25.0 - 25 1 24.8 - 25.1 7.S

  • 8.0 V . 8. 1 7.15
  • 7.64 7.32
  • 7,63 m
  • 1ss 67 7) 77 <0.10 * < 0.10 25.D 25.0 7.9 7.9 7.41 7.44 178 66 74 < 0.10 lnt:ikr .

24.9 - 2S.I 24.S

  • 25.2 u . 8.0 7.7
  • 8.2 7.17
  • 7.62 7.33
  • 7.63 l 75
  • 181 65 67 73 - 75 < 0. \0 ..: 0. 10
              *Note* Toi.al residual chl:>rirc! \ll:IS performed on oon-1rea1ed OutfiU 101 and lnlllke sampk:s.

Overall tempcntun: (°C) Avenige 1\-Jlnimum Muimum Pimephal~s prome/as 24.8 24.4 2S.1 Ceriodaphnia d11bia 25.0 24.8 25.2

SUMMARY

/CONCLUSIONS Exposures to samples collected September 11 - 16, 2022 from Outfall 10 I resulted in no toxic effects to fathead minnows or daphnids. The resulting IC2s values, for both species, were > I 00 percent. Exposure of minnows and daphnids to intake samples resulted in no significant differences from the controls during this study period.

Page 9 of 93

DMR Copy of Record Permit Permit #: TN0026450 Permittee: Tennessee Valley Authority (TVA) Facility: TVA SEQUOYAH NUCLEAR PLANT (SQN) Major: Yes Permittee Address: Sequoyah Access Road, PO Box 2000 Facility Location: SEQUOYAH ACCESS ROAD Soddy Daisy, TN 37379 SODDY DAISY SODDY DAISY, TN 37379 Permitted Feature: 103 Discharge: 103-G Internal Outfall (no description) Report Dates & Status Monitoring Period: From 09/01/22 to 09/30/22 DMR Due Date: 10/15/22 Status: NetDMR Validated Considerations for Form Completion Internal Monitoring Point for various flows from Low Volume Waste Treatment Pond to Diffuser Pond, which eventually discharges through Outfall 101. Principal Executive Officer First Name: Thomas

Title:

Vice President Telephone: 423-843-7001 Last Name: Marshall No Data Indicator (NODI) Form NODI: -- Parameter Monitoring Location Season # Param. NODI Quantity or Loading Quality or Concentration # of Ex. Frequency of Analysis Sample Type r Code Name Qualifier 1 Value 1 Qualifier 2 Value 2 Units Qualifier 1 Value 1 Qualifier 2 Value 2 Qualifier 3 Value 3 Units I Sample = 8.6 = 8.6 12 - SU 01/30 - Monthly GR - GRAB Permit Req. >= 6.0 MINIMUM <= 9.0 MAXIMUM 12 - SU 01/30 - Monthly GR - GRAB 00400 pH IM - Internal Monitoring Point 0 -- Value NODI Sample = 5.8 = 5.8 19 - mg/L 01/30 - Monthly GR - GRAB Permit Req. <= 30.0 MO AVG <= 100.0 DAILY MX 19 - mg/L 01/30 - Monthly GR - GRAB 00530 Solids, total suspended IM - Internal Monitoring Point 0 -- Value NODI Sample < 4.9 < 4.9 19 - mg/L 01/30 - Monthly GR - GRAB Permit Req. <= 15.0 MO AVG <= 20.0 DAILY MX 19 - mg/L 01/30 - Monthly GR - GRAB 00556 Oil & Grease IM - Internal Monitoring Point 0 -- Value NODI Sample = 1.141 = 1.141 03 - MGD 01/30 - Monthly IN - INSTAN Permit Req. Req Mon MO AVG Req Mon DAILY MX 03 - MGD 01/30 - Monthly IN - INSTAN 50050 Flow, in conduit or thru treatment plant IM - Internal Monitoring Point 0 -- Value NODI Submission Note If a parameter row does not contain any values for the Sample nor Effluent Trading, then none of the following fields will be submitted for that row: Units, Number of Excursions, Frequency of Analysis, and Sample Type. Edit Check Errors No errors. Comments Attachments No attachments. Report Last Saved By Tennessee Valley Authority (TVA) User: TRMARKUM Name: Travis Markum E-Mail: trmarkum@tva.gov Date/Time: 2022-10-11 14:24 (Time Zone: -05:00) Report Last Signed By User: TMCMUTUA Name: Tony McMutuary E-Mail: tmcmutuary@tva.gov Date/Time: 2022-10-13 15:40 (Time Zone: -05:00)

DMR Copy of Record Permit Permit #: TN0026450 Permittee: Tennessee Valley Authority (TVA) Facility: TVA SEQUOYAH NUCLEAR PLANT (SQN) Major: Yes Permittee Address: Sequoyah Access Road, PO Box 2000 Facility Location: SEQUOYAH ACCESS ROAD Soddy Daisy, TN 37379 SODDY DAISY SODDY DAISY, TN 37379 Permitted Feature: 107 Discharge: 107-G Internal Outfall (no description) Report Dates & Status Monitoring Period: From 09/01/22 to 09/30/22 DMR Due Date: 10/15/22 Status: NetDMR Validated Considerations for Form Completion Metal Cleaning Waste Pond discharge. No monitoring required for stormwater decanting. Daily monitoring required only during dewatering events. Principal Executive Officer First Name: Thomas

Title:

Vice President Telephone: 423-843-7001 Last Name: Marshall No Data Indicator (NODI) Form NODI: -- Parameter Monitoring Location Season # Param. NODI Quantity or Loading Quality or Concentration # of Ex. Frequency of Analysis Sample Type r Code Name Qualifier 1 Value 1 Qualifier 2 Value 2 Units Qualifier 1 Value 1 Qualifier 2 Value 2 Qualifier 3 Value 3 Units I Sample Permit Req. >= 6.0 MINIMUM <= 9.0 MAXIMUM 12 - SU 01/01 - Daily GR - GRAB 00400 pH IM - Internal Monitoring Point 0 -- Value NODI C - No Discharge C - No Discharge Sample Permit Req. <= 30.0 MO AVG <= 100.0 DAILY MX 19 - mg/L 01/01 - Daily CP - COMPOS 00530 Solids, total suspended IM - Internal Monitoring Point 0 -- Value NODI C - No Discharge C - No Discharge Sample Permit Req. <= 15.0 MO AVG <= 20.0 DAILY MX 19 - mg/L 01/01 - Daily GR - GRAB 00556 Oil & Grease IM - Internal Monitoring Point 0 -- Value NODI C - No Discharge C - No Discharge Sample Permit Req. <= 1.0 MO AVG <= 1.0 DAILY MX 19 - mg/L 01/01 - Daily CP - COMPOS 01042 Copper, total [as Cu] IM - Internal Monitoring Point 0 -- Value NODI C - No Discharge C - No Discharge Sample Permit Req. <= 1.0 MO AVG <= 1.0 DAILY MX 19 - mg/L 01/01 - Daily CP - COMPOS 01045 Iron, total [as Fe] IM - Internal Monitoring Point 0 -- Value NODI C - No Discharge C - No Discharge Submission Note If a parameter row does not contain any values for the Sample nor Effluent Trading, then none of the following fields will be submitted for that row: Units, Number of Excursions, Frequency of Analysis, and Sample Type. Edit Check Errors No errors. Comments Attachments No attachments. Report Last Saved By Tennessee Valley Authority (TVA) User: TRMARKUM Name: Travis Markum E-Mail: trmarkum@tva.gov Date/Time: 2022-10-11 14:26 (Time Zone: -05:00) Report Last Signed By User: TMCMUTUA Name: Tony McMutuary E-Mail: tmcmutuary@tva.gov Date/Time: 2022-10-13 15:40 (Time Zone: -05:00)

DMR Copy of Record Permit Permit #: TN0026450 Permittee: Tennessee Valley Authority (TVA) Facility: TVA SEQUOYAH NUCLEAR PLANT (SQN) Major: Yes Permittee Address: Sequoyah Access Road, PO Box 2000 Facility Location: SEQUOYAH ACCESS ROAD Soddy Daisy, TN 37379 SODDY DAISY SODDY DAISY, TN 37379 Permitted Feature: 110 Discharge: 110-G External Outfall (no description) Report Dates & Status Monitoring Period: From 09/01/22 to 09/30/22 DMR Due Date: 10/15/22 Status: NetDMR Validated Considerations for Form Completion Outfall 110 is closed. Only active in the event the plant goes into closed mode. Principal Executive Officer First Name: Thomas

Title:

Vice President Telephone: 423-843-7001 Last Name: Marshall No Data Indicator (NODI) Form NODI: -- Parameter Monitoring Location Season # Param. NODI Quantity or Loading Quality or Concentration # of Ex. Frequency of Analysis Sample Type r Code Name Qualifier 1 Value 1 Qualifier 2 Value 2 Units Qualifier 1 Value 1 Qualifier 2 Value 2 Qualifier 3 Value 3 Units 1 Sample Permit Req. Req Mon DAILY MX 04 - deg C 99/99 - Continuous CA - CALCTD 00010 Temperature, water deg. centigrade 1 - Effluent Gross 0 -- Value NODI C - No Discharge Sample Permit Req. <= 30.5 DAILY MX 04 - deg C 99/99 - Continuous CA - CALCTD 00010 Temperature, water deg. centigrade Z - Instream Monitoring 0 -- Value NODI C - No Discharge Sample Permit Req. <= 3.0 DAILY MX 04 - deg C 99/99 - Continuous CA - CALCTD 00016 Temp. diff. between samp. & upstrm deg. C 1 - Effluent Gross 1 -- Value NODI C - No Discharge Sample Permit Req. Req Mon MO AVG Req Mon DAILY MX 03 - MGD 99/99 - Continuous RC - Recorder (auto) 50050 Flow, in conduit or thru treatment plant 1 - Effluent Gross 0 -- Value NODI C - No Discharge C - No Discharge Sample Permit Req. <= 0.027 MO AVG <= 0.047 DAILY MX 19 - mg/L 05/WK - Five Per Week GR - GRAB 50060 Chlorine, total residual 1 - Effluent Gross 0 -- Value NODI C - No Discharge C - No Discharge Sample Permit Req. <= 30.5 DAILY MX 62 - deg C/hr 99/99 - Continuous CA - CALCTD 82234 Temperature rate of change deg. C/hr Z - Instream Monitoring 0 -- Value NODI C - No Discharge Sample Permit Req. >= 69.0 MINIMUM 23 - % 01/30 - Monthly GR - GRAB TRP3B IC25 Static Renewal 7 Day Chronic Chrceriodaphnia 1 - Effluent Gross 0 -- Value NODI C - No Discharge Sample Permit Req. >= 69.0 MINIMUM 23 - % 01/30 - Monthly GR - GRAB TRP6C IC25 Static Renewal 7 Day Chronic Chrpimephales 1 - Effluent Gross 0 -- Value NODI C - No Discharge Submission Note If a parameter row does not contain any values for the Sample nor Effluent Trading, then none of the following fields will be submitted for that row: Units, Number of Excursions, Frequency of Analysis, and Sample Type. Edit Check Errors No errors. Comments Attachments No attachments. Report Last Saved By Tennessee Valley Authority (TVA) User: TRMARKUM Name: Travis Markum E-Mail: trmarkum@tva.gov

Date/Time: 2022-10-11 14:27 (Time Zone: -05:00) Report Last Signed By User: TMCMUTUA Name: Tony McMutuary E-Mail: tmcmutuary@tva.gov Date/Time: 2022-10-13 15:40 (Time Zone: -05:00)

DMR Copy of Record Permit Permit #: TN0026450 Permittee: Tennessee Valley Authority (TVA) Facility: TVA SEQUOYAH NUCLEAR PLANT (SQN) Major: Yes Permittee Address: Sequoyah Access Road, PO Box 2000 Facility Location: SEQUOYAH ACCESS ROAD Soddy Daisy, TN 37379 SODDY DAISY SODDY DAISY, TN 37379 Permitted Feature: 118 Discharge: 118-G External Outfall (no description) Report Dates & Status Monitoring Period: From 09/01/22 to 09/30/22 DMR Due Date: 10/15/22 Status: NetDMR Validated Considerations for Form Completion Principal Executive Officer First Name: Thomas

Title:

Vice President Telephone: 423-843-7001 Last Name: Marshall No Data Indicator (NODI) Form NODI: -- Parameter Monitoring Location Season # Param. NODI Quantity or Loading Quality or Concentration # of Ex. Frequency of Analysis Sample Type r Code Name Qualifier 1 Value 1 Qualifier 2 Value 2 Units Qualifier 1 Value 1 Qualifier 2 Value 2 Qualifier 3 Value 3 Units Sample Permit Req. >= 2.0 MINIMUM 19 - mg/L 02/07 - Twice Every Week GR - GRAB 00300 Oxygen, dissolved [DO] 1 - Effluent Gross 0 -- Value NODI C - No Discharge Sample Permit Req. <= 100.0 DAILY MX 19 - mg/L 02/07 - Twice Every Week GR - GRAB 00530 Solids, total suspended 1 - Effluent Gross 0 -- Value NODI C - No Discharge Sample Permit Req. <= 1.0 DAILY MX 25 - mL/L 01/30 - Monthly GR - GRAB 00545 Solids, settleable 1 - Effluent Gross 0 -- Value NODI C - No Discharge Sample Permit Req. Req Mon MO AVG Req Mon DAILY MX 03 - MGD 01/BA - Once Per Batch ES - ESTIMA 50050 Flow, in conduit or thru treatment plant 1 - Effluent Gross 0 -- Value NODI C - No Discharge C - No Discharge Submission Note If a parameter row does not contain any values for the Sample nor Effluent Trading, then none of the following fields will be submitted for that row: Units, Number of Excursions, Frequency of Analysis, and Sample Type. Edit Check Errors No errors. Comments Attachments No attachments. Report Last Saved By Tennessee Valley Authority (TVA) User: TRMARKUM Name: Travis Markum E-Mail: trmarkum@tva.gov Date/Time: 2022-10-11 14:27 (Time Zone: -05:00) Report Last Signed By User: TMCMUTUA Name: Tony McMutuary E-Mail: tmcmutuary@tva.gov Date/Time: 2022-10-13 15:40 (Time Zone: -05:00)}}

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