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 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 1\\14 TENNESSEE VALLEY AUTHORITY

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 Soddy Daisy, TN 37379 Facility Location: SEQUOYAH ACCESS ROAD SODDY DAISY SODDY DAISY, TN 37379 Permitted Feature: 101 External Outfall Discharge: 101-G (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. NODI Quantity or Loading Quality or Concentration

  1. of Ex.

Frequency of Analysis Sample Type Code Name Qualifier 1 Value 1 Qualifier 2 Value 2 Units Qualifier 1 Value 1 Qualifier 2 Value 2 Qualifier 3 Value 3 Units 00010 Temperature, water deg. centigrade 1 - Effluent Gross 0 Sample = 41.9 04 - deg C 99/99 - Continuous RC - Recorder (auto) Permit Req. Req Mon DAILY MX 04 - deg C 99/99 - Continuous RC - Recorder (auto) Value NODI 00010 Temperature, water deg. centigrade Z - Instream Monitoring 0 Sample = 28.3 04 - deg C 99/99 - Continuous CA - CALCTD Permit Req. <= 30.5 DAILY MX 04 - deg C 99/99 - Continuous CA - CALCTD Value NODI 00016 Temp. diff. between samp. & upstrm deg. C 1 - Effluent Gross 1 Sample = 2.2 04 - deg C 99/99 - Continuous CA - CALCTD Permit Req. <= 3.0 DAILY MX 04 - deg C 99/99 - Continuous CA - CALCTD Value NODI 50050 Flow, in conduit or thru treatment plant 1 - Effluent Gross 0 Sample = 1781.4 = 1787.4 03 - MGD 99/99 - Continuous RC - Recorder (auto) Permit Req. Req Mon MO AVG Req Mon DAILY MX 03 - MGD 99/99 - Continuous RC - Recorder (auto) Value NODI 50060 Chlorine, total residual 1 - Effluent Gross 0 Sample Permit Req. <= 0.027 MO AVG <= 0.047 DAILY MX 19 - mg/L 01/07 - Weekly GR - GRAB Value NODI B - Below Detection Limit/No Detection B - Below Detection Limit/No Detection 82234 Temperature rate of change deg. C/hr Z - Instream Monitoring 0 Sample = 1.8 62 - deg C/hr 99/99 - Continuous CA - CALCTD Permit Req. <= 2.0 DAILY MX 62 - deg C/hr 99/99 - Continuous CA - CALCTD Value NODI TRP3B IC25 Static Renewal 7 Day Chronic Chrceriodaphnia 1 - Effluent Gross 0 Sample 100.0 23 - % 01/30 - Monthly CP - COMPOS Permit Req. 69.0 MINIMUM 23 - % 01/30 - Monthly CP - COMPOS Value NODI TRP6C IC25 Static Renewal 7 Day Chronic Chrpimephales 1 - Effluent Gross 0 Sample 100.0 23 - % 01/30 - Monthly CP - COMPOS Permit Req. 69.0 MINIMUM 23 - % 01/30 - Monthly CP - COMPOS 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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Page 3 of 93 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 101 09-11-22 I 0700 to 09-12-22 / 1310 3.3 <0.10 09-1 J-22 / 0823 09-12-22 / 0600 09-14-22 / 0809 Intake 09-11-22 I 0700 to 09-12-22 I 13 I 0 1.4 <0.10 09-lJ-22 I 0823 09-12-22 / 0600 09-14-22 / 0809 101 09-13-22 I 0700 to 09-14-22 / 1253 1.1 <0,10 09-15-22 / 0810 09-14-22 I 0600 09-16-22 I 0807 Intake 09-13-22 / 0700 to 09-14-22 / 1253 1.8 <0.10 09-15-22 I 0810 09-14-22 / 0600 09-16-22 I 0807 09-15-22 / 0700 to 09-17-22 I 0907 101 09-16-22 / 0600 09-16-22 / 1132

2. 7, 2.81

<0.10 09-18-22 / 0904 09-19-22 I 0806 09-15-22 I 0700 to 09-1 7-22 / 0907 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 4 of 93 Test Organisms:

1. Source:
2. Age:

Test Method Summary:

1. Test Conditions:
2. Test Duration:

Pimephales promelas In-house Cultures < 24-hours old Static. Renewal 7 days

3. Control / Dilution Water: Moderately Hard Synthetic
4. Nwnber of Replicates:

1

5. Organisms per Replicate:.lQ
6. Test Initiation: (Date/Time): 09-13-2 2 07 40 ET
7. Test Termination: (Date/Time): 09-20-22 0646 ET
8. Test Temperature: Outfall I 01:

Mean= 24.8°C (24.4 - 25.1 °C)

9. Physical / Chemical Ceriodaphnia dubia In-house Cultures

< 24-hours old Static. Renewal Until at least 60% of control females have 3 broods Moderately Hard Synthetic lQ l 09-13-22 0823 ET 09-20-22 0730 ET Mean = 25.0°C (24.8 - 25.2°C) 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 5 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 Test Solutions Mean Dry Weight (mg)

(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

  • TU a= 100/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 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 Test Solutions Reproduction (#young/fernale/7 days) (% Effluent) Data (replicate number) 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

  • TU a= I 00/LCso: TUc = 100/ IC2s

Page 7 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 Test Solutions Reproduction (#young/female/7 days) (% Effluent) Data (replicate number) 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

  • TU a= 100/LCso: TUc = 100/ IC2s REFERENCE TO XI CANT TEST RES UL TS (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 8 of 93 PHYSICAL/CHEMICAL

SUMMARY

Water Chemistry Mean Values and Ranges for UV-1rcalcd Pimephales promefas and Non-treated Ceriodnphllio 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 Initial Final luililll Final

Conlral, 24.8 24.6 7.8 7.6 Nnn-l~au:O 24 7
  • 24.9 24.-1
  • 24.7 7.7 -

7.9 7.4

  • 7.9 CCll'lf~I, 24.8 24.6 7.9 7.7 lJ\\l-1rur~d 24.7
  • 24.8 24.4
  • 24.8 7.8
8. l 7.5
  • 8.0 ti J7.2S%

24,9 24.6 8,0 7-7 .i 24.8 - 24.9 24.4 - 24,7 7.9

  • 8.1 7.4
  • 7,9 c

24.9 24.6 8.0 7.6 t 3,1.S3/4 24.8 - 24,9 2-4.4 - 24.9 7.9 - 8,1 7.4 - 7,9 ~ 24.9 24.6 !1.0 7.7 ~ 69% 24,9

  • 25.0 24.6
  • 24.8 7,9 8.1 7.5 8.0

~ i; 84.5% 25.0 24.6 8.0 7.7 it 24.9

  • 25.0 14.S
  • 24.9 7.9 8.2 7.5 8.0 100%

2S.O 24.6 8.0 7.6 25.0

  • 25 0 24.4
  • 24.9 7.9
  • 8.2 13
  • 8.0 Intake 25.0 24.6 8.0 7.7 24.8
  • 25.I 2-1.S -

24.7 7.8 * !t3 7.-+

  • 8.1 C"r,tro~.

24.8 25.1 7.8 7.9 Nc,n4 trt! *ttd 24.8 - 24.9 25.0 - 25.2 7,7

  • 79 7.8 8,0 17.lS3/4 24.9 24.9 7.8 7.9 24.9 - 25.0 24.8 -

15.0 7.7 7,9 7.8

  • 80

-~ 24.9 25.0 7.8 7.9 -Q... 34.5% 24.9

  • 2S.0 24.9 -

15.2 7.7

  • 7.9 7.8 8.0

. s 25.0 25.0 7.8 7.9

a:

69% 24.9 - 25.0 14.9

  • 15.2 7.7 7.9 7,8 -

8.0 ~ 25.0 25.0 7.9 7,9 -~ 8.s*;

  • 2S.0
  • 25.0 24.&
  • 25.2 7,8
  • 8.0 7.7
  • 8.1

~ 100% 25.0 24.9 7.9 1.9 25.0 - 25 1 24.8 - 25.1 7.S

  • 8.0 V

8.1 lnt:ikr 25.D 25.0 7.9 7.9 24.9 - 2S.I 24.S

  • 25.2 u

. 8.0 7.7

  • 8.2
  • Note* Toi.al residual chl:>rirc! \\ll:IS performed on oon-1rea1ed OutfiU 101 and lnlllke sampk:s.

Overall tempcntun: (°C) Pimephal~s prome/as Ceriodaphnia d11bia Avenige 24.8 25.0 1\\-Jlnimum 24.4 24.8 Muimum 2S.1 25.2 nll (S.ll.) Initial Finni 7.34 7.33 7.15 - 7.62 7.24

  • 7,39 7.45 7.33 7.34
  • H,3 7.24
  • 7.44 7.46 7.32 7.34 -

7.63 1 7,4) 7.46 7.32 7 33. 7.63 7.26 - 7.41 7.45 7.31 7.30

  • 763 7.25 -

7.4 1 7.44 7.30 7,28

  • 7.6) 7.13
  • 7.41 7.44 7.29 7.27
  • 7.64 7.20 - 7.38 7.44 7.30 728
  • 7.62 7.20
  • 7.43 7.26 7.44 7.15
  • 7.43 7.:l4
  • 763 7.41 7.43 7-26
  • H6 7.32 - 7.63 7.42 7.43 725 -

7 66 7.32

  • 7.64 7.41 7.43 7.21
  • 766 7.)3
  • 7.63 7 41 7.42
7. 18
  • 766 7.32
  • 7.62 7.40 7.44 7.15
  • 7.64 7.32
  • 7,63 7.41 7.44 7.17
  • 7.62 7.33
  • 7.63 Cond11ct:mcc Alkalinity Hardness
  • Total Rcsidu11l

(µmhos/cm) {mg/L CaCOJ) {mg/I. CaCOJ) Chlorine (m g/L) 310 61 87 296

  • 323 60 63 85 -

87 310 60 86 299 - 318 60 61 85 - 87 290 283

  • 304 268 260
  • 278 224 217 -

232 204 197

  • 212 183 66 74

< 0.10 178

  • 19 1 65 67 73 -

75 < O.!O <0.10 179 66 73 <0.10 173

  • 184 65 69 71 -

1S < 0. 10 - < 0.11) 310 61 87 296 - 323 60 63 u 87 289 282 - 295 270 261

  • 277 224 219
  • 233 203 197
  • 208 183 68 75

< 0.10 m

  • 1ss 67 69
7) 77

<0.10 * < 0.10 178 66 74 < 0.10 l 75

  • 181 65.

67 73 - 75 < 0. \\0 ..: 0. 10

Page 9 of 93

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.

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 Soddy Daisy, TN 37379 Facility Location: SEQUOYAH ACCESS ROAD SODDY DAISY SODDY DAISY, TN 37379 Permitted Feature: 103 Internal Outfall Discharge: 103-G (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

  1. of Ex. Frequency of Analysis Sample Type Code Name Qualifier 1 Value 1 Qualifier 2 Value 2 Units Qualifier 1 Value 1 Qualifier 2 Value 2 Qualifier 3 Value 3 Units 00400 pH IM - Internal Monitoring Point 0

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 Value NODI 00530 Solids, total suspended IM - Internal Monitoring Point 0 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 Value NODI 00556 Oil & Grease IM - Internal Monitoring Point 0 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 Value NODI 50050 Flow, in conduit or thru treatment plant IM - Internal Monitoring Point 0 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 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) r I

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 Soddy Daisy, TN 37379 Facility Location: SEQUOYAH ACCESS ROAD SODDY DAISY SODDY DAISY, TN 37379 Permitted Feature: 107 Internal Outfall Discharge: 107-G (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

  1. of Ex. Frequency of Analysis Sample Type Code Name Qualifier 1 Value 1 Qualifier 2 Value 2 Units Qualifier 1 Value 1 Qualifier 2 Value 2 Qualifier 3 Value 3 Units 00400 pH IM - Internal Monitoring Point 0

Sample Permit Req. >= 6.0 MINIMUM <= 9.0 MAXIMUM 12 - SU 01/01 - Daily GR - GRAB Value NODI C - No Discharge C - No Discharge 00530 Solids, total suspended IM - Internal Monitoring Point 0 Sample Permit Req. <= 30.0 MO AVG <= 100.0 DAILY MX 19 - mg/L 01/01 - Daily CP - COMPOS Value NODI C - No Discharge C - No Discharge 00556 Oil & Grease IM - Internal Monitoring Point 0 Sample Permit Req. <= 15.0 MO AVG <= 20.0 DAILY MX 19 - mg/L 01/01 - Daily GR - GRAB Value NODI C - No Discharge C - No Discharge 01042 Copper, total [as Cu] IM - Internal Monitoring Point 0 Sample Permit Req. <= 1.0 MO AVG <= 1.0 DAILY MX 19 - mg/L 01/01 - Daily CP - COMPOS Value NODI C - No Discharge C - No Discharge 01045 Iron, total [as Fe] IM - Internal Monitoring Point 0 Sample Permit Req. <= 1.0 MO AVG <= 1.0 DAILY MX 19 - mg/L 01/01 - Daily CP - COMPOS 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) r I

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 Soddy Daisy, TN 37379 Facility Location: SEQUOYAH ACCESS ROAD SODDY DAISY SODDY DAISY, TN 37379 Permitted Feature: 110 External Outfall Discharge: 110-G (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

  1. of Ex. Frequency of Analysis Sample Type Code Name Qualifier 1 Value 1 Qualifier 2 Value 2 Units Qualifier 1 Value 1 Qualifier 2Value 2Qualifier 3 Value 3 Units 00010 Temperature, water deg. centigrade 1 - Effluent Gross 0

Sample Permit Req. Req Mon DAILY MX 04 - deg C 99/99 - Continuous CA - CALCTD Value NODI C - No Discharge 00010 Temperature, water deg. centigrade Z - Instream Monitoring 0 Sample Permit Req. <= 30.5 DAILY MX 04 - deg C 99/99 - Continuous CA - CALCTD Value NODI C - No Discharge 00016 Temp. diff. between samp. & upstrm deg. C 1 - Effluent Gross 1 Sample Permit Req. <= 3.0 DAILY MX 04 - deg C 99/99 - Continuous CA - CALCTD Value NODI C - No Discharge 50050 Flow, in conduit or thru treatment plant 1 - Effluent Gross 0 Sample Permit Req. Req Mon MO AVG Req Mon DAILY MX 03 - MGD 99/99 - Continuous RC - Recorder (auto) Value NODI C - No Discharge C - No Discharge 50060 Chlorine, total residual 1 - Effluent Gross 0 Sample Permit Req. <= 0.027 MO AVG <= 0.047 DAILY MX 19 - mg/L 05/WK - Five Per Week GR - GRAB Value NODI C - No Discharge C - No Discharge 82234 Temperature rate of change deg. C/hr Z - Instream Monitoring 0 Sample Permit Req. <= 30.5 DAILY MX 62 - deg C/hr 99/99 - Continuous CA - CALCTD Value NODI C - No Discharge TRP3B IC25 Static Renewal 7 Day Chronic Chrceriodaphnia 1 - Effluent Gross 0 Sample Permit Req. >= 69.0 MINIMUM 23 - % 01/30 - Monthly GR - GRAB Value NODI C - No Discharge TRP6C IC25 Static Renewal 7 Day Chronic Chrpimephales 1 - Effluent Gross 0 Sample Permit Req. >= 69.0 MINIMUM 23 - % 01/30 - Monthly GR - GRAB 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 r 1

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 Soddy Daisy, TN 37379 Facility Location: SEQUOYAH ACCESS ROAD SODDY DAISY SODDY DAISY, TN 37379 Permitted Feature: 118 External Outfall Discharge: 118-G (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

  1. of Ex.

Frequency of Analysis Sample Type Code Name Qualifier 1 Value 1 Qualifier 2 Value 2 Units Qualifier 1 Value 1 Qualifier 2 Value 2 Qualifier 3 Value 3 Units 00300 Oxygen, dissolved [DO] 1 - Effluent Gross 0 Sample Permit Req. >= 2.0 MINIMUM 19 - mg/L 02/07 - Twice Every Week GR - GRAB Value NODI C - No Discharge 00530 Solids, total suspended 1 - Effluent Gross 0 Sample Permit Req. <= 100.0 DAILY MX 19 - mg/L 02/07 - Twice Every Week GR - GRAB Value NODI C - No Discharge 00545 Solids, settleable 1 - Effluent Gross 0 Sample Permit Req. <= 1.0 DAILY MX 25 - mL/L 01/30 - Monthly GR - GRAB Value NODI C - No Discharge 50050 Flow, in conduit or thru treatment plant 1 - Effluent Gross 0 Sample Permit Req. Req Mon MO AVG Req Mon DAILY MX 03 - MGD 01/BA - Once Per Batch ES - ESTIMA 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) r}}

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