ML19283A259

Transmittal of National Pollutant Discharge Elimination System NPDES Permit Approved on July 2, 2019

ML19283A259
Person / Time
Site:	Grand Gulf
Issue date:	10/10/2019
From:	Emily Larson Entergy Operations
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
GNR0-2019/00043
Download: ML19283A259 (64)

Text

Entergy Operations, Inc.

P. 0. Box 756 Port Gibson, MS 39150 Eric A. Larson Site Vice President Grand Gulf Nuclear Station Tel. (601) 437-7500 GNR0-2019/00043 October 10, 2019 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555:0001

SUBJECT:

Grand Gulf f'Juclear Station National Pollutant Discharge Elimination System NPDES Permit Grand Gulf Nuclear Station, Unit 1 Docket No. 50-416 License No. NPF-29

Dear Sir or Madam:

Attached is the Grand Gulf Nuclear Station National Pollutant Discharge Elimination System NPDES Permit approved on July 2, 2019. This report is submitted in accordance with the requiremen.ts of the GGNS Unit 1 Operating License Environmental Protection Plan.

This letter contains no new commitments. If you have any questions or require additional information, please contact Kevin Sanders at 601-437-1426.

Sin*cerely, Cat Eric A. Larson EAUdre

Attachment:

Grand Gulf Nuclear Station National Pollutant Discharge Elimination System NPDES Permit approved on July 2, 2019 cc: see n~xt page

G N R0-2019/00043 Page 2 of 2

.. cc: U.S. Nuclear Regulatory Commission ATTN: Mr. Siva Lingam Mail Stop OWFN 8 81 Rockville, MD 20852-2738 NRC Senior Resident Inspector Grand Gulf Nuclear Station Port Gibson, MS 39150 U. S. Nuclear Regulatory Commission Region Administrator, Region IV Mail Stop OWFN 8 81 Washington, DC 20555-0001 Director, Division of Radiological Health Mississippi State Department of Health Division of Radiological Health 3150 Lawson Street Jackson, MS 39213

• Attachment 1

. Grand Gulf Nuclear Station National Pollutant Discharge Elimination System NPDES Permit approved on July 2, 2019

State of Mississippi WATER POLLUTION CONTROL PERMIT Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System THIS CERTIFIES Entergy Mississippi Inc, Grand Gulf Nuclear Station 7003 Bald Hill Road*

Port Gibson, MS Claiborne County has been granted permission to discharge wastewater in accordance with the effluent limitations, monitoring requirements and other conditions set forth in this permit. This permit is issued in accordance with the provisions of the Mississippi Water Pollution Control Law (Section 49-17-1 et seq., Mississippi Code of 1972), and the regulations and standards adopted and promulgated thereunder, and under authority granted pursuant to Se.ction 402(b) of the Federal Water Pollution Control Act.

Mississippi Environmental Quality Permit Board Issued/Modified: JUL O2 2019 Permit No. MS0029521 Expires: JUN 3 0 2024 Agency Interest # 2082

Table of Contents Subject Item Inventory .................................................................................................................................................................. .i Facility Requirements ................................................................................................................................................................... 1 General Information.....................................................................................................................................................................A-1 Other Relevant Documents:

Permit to Discharge_Wastewater in Accordance with National Pollutant Discharge Elimination System Entergy Mississippi Inc, Grand Gulf Nuclear Station Subject Item Inventory Permit Number: MS002952 l Activity ID No.: PER20160001 Subject Item Inventory:

ID Designation Description AI2082 Nuclear Power Generation Facility RPNTl MS0029521-001 Outfall 001 (Discharge/Mi_xing Basin discharge. Effluent consists of wastewater from the internal Outfalls 002, 004, 005, 006, and 011 and discharges to the Mississippi River) - EXTERNAL -

RPNT2 MS0029521-002 Outfall 002 (Natural Draft and Auxiliary Cooling Tower Blowdown) - INTERNAL RPNT3 MS0029521-004 Outfall 004 (Unit A Standby Service Water Cooling Tower Blow'down) - INTERNAL RPNT4 MS0029521-005 Outfall 005 (Unit B Standby Service Water Cooling Tower Blowdown) - INTERNAL RPNT5 MS002952 l-006 Outfall 006 (Treated low volume wastes consisting of demineralizer wastewater, carbon filter backwash, and Water Treatement Building sump wastewater)- INTERNAL RPNT6 MS002952 l-007 Outfall 007 (Low volume waste discharge consisting of miscellaneous wastewaters discharged into Sediment Basin B. The wastewater is comprised of Administrative Building drains, yard and storm drains, fire water pump house, oily waste sumps, ionics reject water, Turbine Building cooling water blowdown, HVAC cooling tower wastewater, HVAC once-through cooling, outage air compressor*

once-through cooling, intermittent standby service water, plant service water leakage and small releases)..; INTERNAL RPNT7 MS0029521-010 Outfall 010 (Total.facility treated sanitary wastewater discharged to Basin A) - INTE~AL RPNT8 MS0029521-011 Outfall 011 (Low Volume Wastes discharge consisting of ion exchange wastewater from the liquid radwaste treatment system, floor drains, and lab drains) - INTERNAL RPNT9 MS0029521-013 Outfal{ 013 (Treated effluent from Basin A that enters an Unnamed Tributary thence into Hamilton Lake: Contributing sources of wastewaters include stand by service water leakage, storm water runoff, and the combined discharge of Internal Outfalls 010 and 016)-

EXTERNAL RPNTIO MS002952 I-O 14 Outfall 014{Treated Effluent from Basin B which enters an Unnamed Tributary thence into Hamilton Lake. Contributing wastewater sources include effluents from internal Outfall 007, and storm water runoff) - EXTERNAL RPNTll MS002952 l-O 16 Outfall 016 (Low volume waste discharge consisting of miscellaneous wastewaters from the Energy Services Center inclusive ofECS water Softener back wash, HVAC cooling tower waste water, plant softener backwash, and storm water runoff) - INTERNAL Page i of iii

Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System Entergy Mississippi Inc, Grand Gulf Nuclear Station Subject Item Inventory Permit Number: MS002952 l Activity ID No.: PER20160001 Receiving Stream Relationships:

Subject Item Relationship Receiving Stream RPNTI Outfall 001 (Discharge/Mixing Basin discharge. Effluent consists of wastewater from the internal Outfalls Discharges Into Mississippi River 002, 004, 005, 006, and 011 and discharges to the Mississippi River)-EXTERN AL RPNTlO Outfall 014 (Treated Effluent from Basin B which enters an Unnamed Tributary thence into Hamilton Discharges Into U.nnamed Creek Lake. Contributing wastewater sources include effluents from internal Outfall 007, standby service water leakage, intermittent circulating water basin overflows, and storm water runoff) - EXTERNAL Then Into Lake Hamilton RPNTl I Outfall O16 (Low volume waste discharge consisting of miscellaneous wastewaters from the Energy Discharges* Into Unnamed Creek Services Center inclusive ofECS water Softener back wash, HVAC cooling tower waste water, plant softener backwash, and storm water runoff) - INTERNAL .Then Into Lake Hamilton RPNT2 Outfall 002 (Natural Draft and Auxiliary Cooli~g Tower Blowdown) - INTERNAL Discharges Into Mississippi River RPNT3 Outfall 004 (Unit A Standby Service Water Cooling Tower Blowdown) - INTERNAL Discharges Into Mississippi River RPNT4 Outfall 005 (Unit B Standby Service Water Cooling Tower Blowdown) - INTERNAL Discharges Into Mississippi River RPNT5 Outfall 006 (Treated low volume wastes consisting of demineralizer wastewater, carbon filter backwash, Discharges Into Mississippi River md Water Treatement Buildin_g sump wastewater) - INTERNAL RPNT6 Outfall 007 (Low volume waste discharge consisting of miscellaneous wastewaters discharged into Discharges Into Unnamed Creek Sediment Basin B. The wastewater is comprised of Administrative Building drains, yard and storm drains, fire water pump house, oily waste sumps, ionics reject water, Turbine Building cooling water blowdown, HVAC Then Into Lake Hamilton cooling tower wastewater, HVAC once-through cooling, outage air compressor once-through cooling, intermittent standby service water, plant service water leaka~e and small releases) - INTERNAL RPNT7 Outfall 010 (Total facility treated sanitary wastewater discharged to Basin A) - INTERNAL Discharges Into Unnamed Creek Then Into Lake Hamilton RPNT8 Outfall 011 (Low Volume Wastes discharge consisting of ion exchange wastewater froll! the liquid Discharges Into Mississippi River

~adwaste treatment system, floor drains, and lab drains) - INTERNAL RPNT9 Outfall O13 (Treated effluent from Basin A that enters an Unnamed Tributary thence into Hamilton Lake. Discharges Into Unnamed Creek Contributing sources ofwastewaters include stand by service water leakage, storm water runoff, and the combined discharge of Internal Outfalls OIO and O16)- EXTERNAL ,*,

Then Into Lake Hamilton Page ii of iii

Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System Entergy Mississippi Inc, Grand Gulf Nuclear Station Subject Item Inventory Permit Number: MS0029521 Activity ID No.: PER20160001 KEY ACT = Activity AI = Agency Interest AREA=Area CONT = Control Device CAFO = Concentrated Animal Feeding Operation IA = Insignificant Activity EQPT = Equipment MAFO = Animal Feeding Operation IMPD = lmpoundment PCS =PCS RPNT = Release Point TRMT = Treatment WDPT = Withdrawal Point Page iii of iii

EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Subject Item: Outfall 001 (Discharge/Mixing Basin discharge. Effluent consists of wastewater from the internal Outfalls 002, 004, 005, 006, and 011 and discharges to the Mississippi River) - EXTERNAL RPNTOOOOOOOOOOl: MS0029521-001 Such discharges shall be limited and monitored by the permittee as specified below:

Daily Maximum 0.2 0.5 mg/L See Permit Check Jan-Dec Monthly Daily Maximum Requirements

• • • • • • ****** ****** ****** Average Report Million Gallons Continuously Continuous Jan-Dec Daily Maximum per Day Recorder 6.0 9.0 SU Weekly Grab Sampling Jan-Dec Minimum Maximum Report Report degrees F Continuously Continuous Jan-Dec Monthly Daily Maximum Recorder

• • • • • • ****** ****** ****** Average Limits and Monitoring 1 of 11

EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Subject Item: Outfall 002 (Natural Draft and Auxiliary Cooling Tower Blowdown) - INTERNAL RPNT00000000002: MS0029521-002 Such discharges shall be limited and monitored by the permittee as specified below:

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120 minutes Twice per Measurement Jan-Dec Daily Maximum Month 0.2 0.5 mg/L Continuously Check Jan-Dec

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- Monthly Daily Maximum Requirements

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0.2 0.2 mg!L Twice per 24-hr Jan-Dec Monthly Daily Maximum Month Composite

• • • • • • ****** ****** .****** Average Report Million Gallons Twice per Instantaneous Jan-Dec Daily Maximum per Day Month Sampling y:;;

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1.0 Monthly Average 1.0 Daily Maximum mg/L Twice per Month 24-hr Composite Jan-Dec Limits and Monitoring 2 of 11

EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Subject Item: Outfall 004 (Unit A Standby Service Water Cooling Tower Blowdown)- INTERNAL RPNT00000000003: MS0029521-004 Such discharges shall be limited and monitored by the permittee as specified below:

Daily Maximum 0.2 0.5 mg/L Once per Check Jan-Dec Monthly Daily Maximum Batch During Requirements

• • • • • • ****** ****** ****** Average Operation 0.2 0.2 mg/L Once per Check Jan-Dec Monthly Daily Maximum Batch During Requirements

• • • • • • ****** ****** ****** Average Operation Report Million Gallons Once per Instantaneous Jan-Dec Daily Maximum per Day Batch During Sampling

• • • • • • ****** ****** ****** Operation 1.0 1.0 mg/L Once per Check Jan-Dec Monthly Daily Maximum Batch During Requirements

• • • • • • ****** ****** ****** Average Operation Limits and Monitoring 3 of 11

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EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Subject Item: Outfall 005 (Unit B Standby Service Water Cooling Tower Blowdown)- INTERNAL RPNT00000000004: MS0029521-005 Such discharges shall be limited and monitored by the permittee as specified below:

Daily Maximum 0.2 0.5 mg/L Once per Check Jan-Dec Monthly Daily Maximum Batch During Requirements

• • • • • • ****** ****** ****** Average Operation 0.2 0.2 mg/L Once per Check Jan-Dec Monthly Daily Maximum Batch During Requirements

• • • • • • ****** ****** ****** Average Operation Report Million Gallons Once per Instantaneous Jan-Dec Daily Maximum per Day Batch During Sampling

• • • • • • ****** ****** ****** Operation 1.0 1.0 mg!L Once per Check Jan-Dec Monthly Daily Maximum Batch During Requirement~

• • • • • • . ****** ****** ****** Average Operation Limits and Monitoring 4 of 11

EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Subject Item: Outfall 006 (Treated low vol~me wastes consisting of demineralizer wastewater, carbon filter backwash, and Water Treatement Building sump wastewater) - INTERNAL RPNTOOOOOOOOOOS: MS0029521-006 Such* discharges shall be limited and monitored by the pennittee as specified below:

Report Million Gallons Once per Instantaneous Jan-Dec Daily Maximum per Day Batch During* Sampling

• • • • • • ****** ****** ****** Operation 15 20 mg/L Once per Grab Sampling Jan-Dec Monthly Daily Maximum Batch During

• • • • • • ****** ****** ****** Average Operation 30 100 mg/L Once per Grab Sampling Jan-Dec Monthly Daily Maximum Batch During

• • • • • • ****** ****** ****** Average Operation Limits and Monitoring 5 of 11

EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Subject Item: Outfall 007 (Low volume waste discharge consisting of miscellaneous wastewaters discharged into Sediment Basin B. The wastewater is comprised of Administrative Building drains, yard and storm drains, fire water pump house, oily waste sumps, ionics reject water, Turbine Building cooling water blowdown, HVAC cooling tower wastewater, HVAC once-through cooling, outage air compressor once-through cooling, intermittent standby service water, plant service water leakage and small releases)- INTERNAL RPNT00000000006: MS0029521-007 Such discharges shall be limited and monitored by the permittee as specified below:

Report Mi llionGallons Twice per Instantaneous Jan-Dec Daily Maximum perDay Moqth Sampling

15. 20 mg/L Twice per Grab Sampling Jan-Dec Monthly Daily Maximum Month

• • • • • "' "'***** ****** "'***** Average 30 100 mg/L Twice per Grab Sampling Jan-Dec Monthly Daily Maximum Month

• • • • • • ****** ****** ****** Average Limits and Monitoring 6 of 11

EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Subject Item: Outfall 010 {T<,>tal facility treated sanitary wastewater discharged to Basin A) - INTERNAL RPNT00000000007: MS0029521-010 Stich discharges shall be limited and monitored by the permittee as specified below:

Daily Maximum 126 410 #of Twice per Grab Sampling Nov-Apr Monthly Daily Maximum colonies/I 00 ml Month

• • • • • • ****** ****** ****"'* Average

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Report Million Gallons Continuously Continuous Jan-Dec Daily Maximum per Day Recorder 30 45 mg/L Twice per 24-hr Jan-Dec Monthly Daily Maximum Month Composite

• • • • • "' ****** ****** ****** Average 6.0 9.0 SU Twice per Grab Sampling Jan-Dec

...l,*: Minimum Maximum Month

• • • • • • ****** ** -~~** ****** .

30 45 mg/L Twice per 24-hr

• Jan-Dec Monthly Daily Maximum Month Composite

• • • • "* ****** ****** ****** Average Limits and Monitoring 7 of 11

EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Subject Item: Outfall 011 (Low Volume Wastes discharge consisting of ion exchange wastewater from the liquid radwaste treatment system, floor drains, and lab drains)- INTERNAL RPNTOOOOOOOOOOS: MS0029521-011 Such discharges shall be limited and monitored by the permittee as specified below:

15 20 mg!L Twice per Grab Sampling Jan-Dec Monthly Daily Maximum Month

• • • • • • ****** ****** ****** Average Report 30 mg/L Monthly Grab Sampling Jan-Dec Monthly Daily Maximum

• • • • • • ****** ****** ****** Average Limits and Monitoring 8 of 11

EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Subject Item: Outfall 013 (Treated effluent from Basin A that enters an Unnamed Tributary thence into Hamilton Lake.

Contributing sources ofwastewaters include stand by service water leakage, storm water runoff, and the combined discharge of Internal Outfalls 010 and 016)- EXTERNAL RPNT00000000009: MS0029521-013 Such discharges shall be limited and monitored by the permittee as specified below:

6.0 9.0 SU Quarterly Grab Sampling Jan-Dec Minimum Maximum Report Report mg/L Quarterly Grab Sampling Jan-Dec Annual Ave,rage Annual

• • • • • • ****** ****** ****** Maximum Report 0.065 mg/L Monthly 24-hr Jan-Dec Quarterly Quarterly Composite

• • • • • • ****** "**** ****** Average Maximum Limits and Monitoring 9 of 11

EFFLUENT LIMITATIONS AND MONITORING REQUIRKMENTS Subj~lt Item: Outfall 014 (Treated Effluent from Basin B which enters an Unnamed Tributary thence into Hamilton Lake.

Contributing wastewater sources include effluents from internal Outfall 007, and storm water runoff)-

EXTERNAL .

RPNTOOOOOOOOOOlO: MS0029521-014 Such discharges shall be limited and monitored by the permittee as specified below:

per Day Sampling 6.0 9.0 SU Quarterly Grab Sampling Jan-Dec Minimum Maximum Report Report mg/I. Quarterly Grab Sampling Jan-Dec Annual Average Annual

• • • • • • ****** *"'**** "'***** Maximum Report 0.065 mg/I. Monthly 24:.hr Jan-Dec Quarterly Quarterly Composite

• • • • • • ****** ****** ****** Average Maximum Limits and Monitoring 10 of 11

EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Subject Item: Outfall 016 (Low volume waste discharge consisting of miscellaneous wastewaters from the Energy Services*

Center inclusive of ECS water Softener back wash, HVAC cooling tower waste water, plant softener backwash, and storm water runoff) - INTER.i~AL RPNT000000000011: MS0029521-016 Such discharges shall be limited and monitored by the permittee as specified below:

Million Gallons Twice per Instantaneous Jan-Dec per Day Quarter Sampling 15 20 mg/L

• Twiceper Grab Sampling Jan-Dec Annual Average Annual Quarter

• • • • • • ****** ****** ****** Maximum 6.0 9.0 SU Twice per Grab Sampling Jan-Dec Minimum Maximum Quarter 30 100 mg/L Twice per Grab Sampling Jan-Dec Annual Average Annual Quarter

• • "'*** ****** ****** ****** Maximum Limits and Monitoring 11 of 11

Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System

• Entergy Mississippi Inc, Grand Gulf Nuclear Station F~cility Requirements Pennit Number: MS002952 l Activity ID No.:PER20160001 Page 1 of 42 AI0000002082 Nuclear Power:Ge~~ra~on Facility:

Limitation Requirements:;i{

tfi/.1:*

Condition No. Parameter Condition L-1 Polych~orinated Biphenyls Polychlorinated Biphenyls: There shall be no discharge ofpolychlorinated byphenol compounds (PCB's) such as those commonly found in transfonner fluid. In the event that PCB containing equipment is used on site, administrative procedures shall be instituted to: -

( 1) Maintain a detailed inventory of PCB use; (2) Assure engineering design and construction to preclude release of PCB's to the environment:

(3) Effectively detect the loss of PCB's from equipment. PCB containing equipment is any laj'ge volume containing vessels kept on site with the potential to pollute State Waters (i.e. transfonners). [40 CFR 423.12.(b )(2)]

L-2 The discharge ofblowdown from the cooling system shall be limited to the discharge of recirculating water necessary for the purpose of discharging materials contained in the process, the further build-up of which would cause concentrations or

~aunts exceeding limits established in this pennit. Discharge temperatures shall not exceed the lowest temperature of the recirculating cooHng water prior to the addition of make-up. [11 Miss. Admin. Code Pt. 6~ R. 1.1.4.A(4)]

Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System Entergy Mississippi Inc, Grand Gulf Nuclear Station Facility Requirements .

Permit Number: MS0029521 Activity ID No.:PER20160001 Page 2 of 42 AI0000002082 Nuclear Power Generation Facility:

Limitation Reguirements:

Condition No. Parameter Condition L-3 Thermal Mixing Zone:

The receiving water shall not exceed a maximum water temperature change of2.8 degrees Celcius (5.0 degrees Fahrenheit) relative to the upriver temperature, outside a mixing zone not exceeding a maximum width of 60 feet from the river edge and a maximum length of 6,000 feet downstream from the point of discharge, as measured at a depth of 5 feet. The river edge shall be defined as being no further east than the mouth of the barge slip. The maximum water temperature shall not exceed 32.2 degrees Celcius (90 degrees Fahrenheit) outside the same mixing zone, except then ambient temperatures approach or exceed this value.

Thermal Modeling:-..__

Thermal monitoring shall be performed any time the river stage is less than 0.5 feet (Vicksburg gauge) during winter months (November-April) or, is less than minus 1.2 feet (-1.2 ft) (Vicksburg gauge) during the summer months (May-October). If these conditions occur and the plant is generating power, monitoring shall be performed upriver at PT.I (surface/5 feet sub-surface), Discharge Outlet, Barge Slip Outlet, and down river at PT.7.

However, once monitoring has been performed at river stages less than those cited (0.5 feet during the winter months and minus 1.2 feet (-1.2 ft) during the summer months), the river stages which existed at the time of thermal modeling, will then become the standard river stage during which a subsequent monitoring exercise must be performed if the river falls below that stage. Thorough documentation shall be maintained on file of the river stage during each period of thermal monitoring.

This policy is subject to modification)f any data collected during a particular stage indicates temperature variations not previously me.asured. [WPC-1 Chapter One IV.A.28(a)]

L-4 Copies of any and all routine liquid effluent and water quality monitoring reports submitted to the Nuclear Regulatory Commission (NRC) shall be simultaneously submitted to the Mississippi Office of Pollution Control Permit Board and EPA.

Copies of any routine and non-routine reports submitted to the Permit Board and EPA shall also be submitted tot he NRC when regarded necessary for their review. [11 Miss. Admin. Code Pt. 6, R. 1.1.4.A(4)]

Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System Entergy Mississippi Inc, Grand GulfNuclear Station Facility Requirements Pennit Number: MS0029521 Activity ID No.:PER20160001 Page 3 of42 AI0000002082 Nuclear Power Generation Facility:

Limitation Requirements:

Condition No. Parameter Condition L-5 Discharge of uncontaminated water including fire protection water, condensate from air conditioning equipment, cooling*

tower make-up bypasses, radial well direct discharges, uncontaminated secondary containment infiltration, domestic/construction water, and yard drains to the yard drainage system is permitted without limitation or monitoring requirements. [11 Miss. Admin. Code Pt. 6, R. 1.l.4.A(4)]

L-6 Discharges resulting from outages or other maintenance activities resulting from the drainage of the Circulating Water System (CWS) and associated components shall meet monitoring requirements specified for Outfall 002. The permittee shall notify the Permit Board of such discharges no less than ten (10) days prior to the discharge. Bioassay results may be r~quired

~ if conditions warrant. [ 11 Miss. Admin. Code Pt. 6, R. 1.1.4.A(4)]

L-7 System discharges during outages or other maintenance activities resulting from the drainage of the Standby Service Water System (SSW) and associated components shall meet the effluent limitations and monitoring requirements specified for Outfall 004 and Outfall 005. The permittee shall notify the Permit Board of such discharges no less than ten (10) days prior to the discharge. Bioassay results may be required if conditions warrant. [11 Miss. Admin. Code Pt. 6, R. 1.1.4.A(4)]

L-8 Solid waste treatment sludge shall be disposed of in an approved manner. The J;iandling, dewatering, storage, compaction and method of placement of this material shall be in accordance with Permit Board Requirements. [11 Miss. Admin. Code Pt. 6, R. 1.1.4.A(4)]

L-9

• Applicable administrative procedures regarding Radioactive Discharge Controls shall be followed in management of discharges from.the Turbine Building Cooling Water System, which is disposed of through Outfa:11 007. *[11 Miss. Admin.

Code Pt. 6, R. l.l.4.A(4)]

L-10 There shall be no discharge of Metal Cleaning Wastewater. [11 Miss. Admin. Code Pt. 6, R. l.l.4.A(4)]

L-11 There shall be no discharge of floating solids or visible foam in other than trace amounts. [11 Miss. Admin. Code Pt. 6, R.

2.2.A(2).]

L-12 The discharges shall not cause the occurrence of a visible sheen on the surface of the receiving waters. [11 Miss. Adm in.

Code Pt. 6, R. 2.2:A(2).]

Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System Entergy Mississippi Inc, Grand Gulf Nuclear Station Facility Requirements Permit Number: MS0029521 Activity ID No.:PER20160001 Page4 of42 AI0000002082 Nuclear Power Generation Facility:

Limitation Requirements:

Condition No. Parameter Condition L-13 Samples taken in compliance with the monitoring requirements specified in this permit shall be taken at the nearest accessible point after final treatment but prior to mixing with the receiving stream or as otherwise specified in this permit. [11 Miss.

Admin. Code Pt. 6, R. l. l.4.A(28).] -

Record-Keeping Requirements:

Condition No. Condition R-1 Recording of Results For each measurement or sample taken pursuant to the requirements of this permit, the permittee shall maintain records of all information obtained from such monitoring including:

( 1) The exact place, date, and time of sampling; (2) The dates the analyses were performed; (3) The person(s) who performed the analyses; (4) The analytical techniques, procedures or methods used; and (5) The results ofall required analyses. [11 Miss. Admin. Code Pt. 6, R. l.l.4.A(29)(a).]

Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System Entergy Mississippi Inc, Grand 9ulf Nuclear Station Facility Requirements Permit Number: MS0029521 Activity ID No.:PER20160001 Page 5 of 42 AI0000002082 Nuclear Power Generation Facility:

Submittal/Action Require~ents:

Condition No. Condition S-1 The permittee shall, not less than once annually, (with the DMR due on January 28th), certify that chemicals added for cooling water system maintenance, including such chemicals used for corrosion inhibition, do not result in the discharge via cooling tower blowdown of any of the 126 priority pollutants (excluding zinc but including chromium) in detectable concentrations. Additionally, once for each product used for cooling tower maintenance (unless subsequent changes in the product formulation occur or, the product is obtained from a different source), compliance shall be demonstrated by submission of certification from the manufacturer that such product contains no priority pollutants. Submit an Annual Cqmpliance Certification: Due annually by the 28th of January. [WPC-1 Chapter One]

S-2 Reporting Monitoring results obtained during the previous reporting period shall be summarized and reported on a Discharge Monitoring Report (DMR). DMR data must be submitted submitted electronically using the MDEQ NetDMR system NO LATER THAT THE 28TH DAY OF THE MONTH FOLLOWING THE COMPLETED REPORTING PERIOD.

DMRs and all other reports required herein, shall be signed in accordance with 11 Miss. Ad.min. Code Pt. 6, R. 1.1.4.A(lS)(c)(l). of the Mississippi Wastewater Regulations. [11 Miss. Admin. Code Pt. 6, R. 1.1.4:A(IS)c(l)., 40 CFR 122.21(1)(4)(i)]

S-3 Reporting Requirements - Planned Changes The permittee shall give notice to the Permit Board as soon as possible of any planned physical alterations or additions, including but not limited to, a change of operation to the permitted facility. Notice is required in the circumstances that follow:

(I) The alteration or addition to a permitted facility may meet one of the criteria for determining whether the facility is a new source in 40 CFR 122.29(b); or (2) The alteration or addition could significantly change the nature or increase the quantity of pollutants discharged. This notification applies to pollutants which are not subject to either effluent limitations in the permit or notification requirements under 40 CFR 122.42(a)(l). *

(3) The alteration or addition results in a significant change in the permitte~'s sludge use*or disposal practices, and such alteration, addition, or change may justify the

• application of permit conditions that are different from or absent in the existing permit, including notification of additional use or disposal sites not reported during the permit application process or not reported pursuant to an approved land application plan; [11 Miss. Admin. Code Pt. 6, R. l.l.4.A(l5)(a).]

Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System Entergy Mississippi Inc, Grand Gulf Nuclear Station Facility Requirements Permit Number: MS0029521 Activity ID No.:PER20160001 Page 6 of 42 AI0000002082 Nuclear Pow-er Generation Facility:

Submittal/Action Requirements:

Condition No. Condition S-4 Reporting Requirements - Anticipated Noncompliance The permittee shall give advance notice to the Permit Board of any planned changes in the permitted facility or activity which may result in noncompliance with permit requirements. [11 Miss. Admin. Code Pt. 6, R. l.l.4.A(29)(b).]

S-5 Noncompliance Notification - Twenty-Four Hour Reporting

( 1) The permittee shall report any noncompliance which may endanger health or the environment. Any information shall be provided orally within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> from the time the permittee becomes aware of the circumstances. A written submission shall also be provided within 5 days of the time the permittee becomes aware of the circumstances. The written submission shall contain a description of the noncompliance and its cause; the period of noncompliance, including exact dates and times, and if the noncompliance has not been corrected, the anticipated time it is expe_cted to continue; and steps taken or planned to reduce, eliminate, and/or prevent recurrence of the noncompliance.

(2) The following shall be included as information which must be reported within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> under this paragraph.

(i) Any unanticipated bypass which exceeds any effluent limitation in the permit.

(ii) Any upset which exceeds any effluent limitation in the permit.

(iii) Violation of a maximum daily discharge limitation for any of the pollutants listed by the Permit Board in the permit to be reported within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

(iv) The Executive Director may waive the written report on a case-by-case basis for reports under paragraph (1) of this section if the oral report has been received within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. -

All reports required by this condition which are submitted after December 20, 2020, shall be submitted by the permittee electronically as instructed by MDEQ. [11 Miss.

Admin. Code Pt. 6, R. l.l.4.A(29}(e)., 40 CFR 122.41.(1)(6)]

Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System Entergy Mississippi Inc, Grand Gulf Nuclear Station Facility Requirements Permit Number: MS002952 l Activity ID No.:PER20160001 Page 7 of42 AI0000002082 Nuclear Power Generation Facility:

Submittal/Action Requirements:

Condition No. Condition S-6 Noncompliance Notification - Other Noncompliance The permittee shall report all instances of noncompliance not reported under the twenty-four hour reporting requirements, at the time monitoring reports are submitted or within 30 days from the end of the month in which the noncompliance occurs. The reports shall contain the same information as is required under the twenty-four hour reporting requirements contained in this permit.

All reports required by this condition which are submitted after December 20, 2020, shall be submitted by the permittee electronically as instructed by MDEQ. [11 Miss.

Admin. Code Pt. 6, R. l.l.4.A(29)(f)., 40 CFR 122.41.(1)(7)]

S-7 Noncompliance Notification - Other Information Where the permittee becomes aware that it failed to submit any relevant facts in a permit application, or submitted incorrect information in a permit application or in any report to the Permit Board, it shall promptly submit such facts or information. [I I Miss. Admin. Code Pt. 6, R. 1.1.4.A(29)(g).]

S-8 Bypassing-Notice Anticipated bypass-If the permirtee knows in advance of the need for a bypass, it shall submit prior notice, if possible at least ten days before the date of the bypass.

Unanticipated bypass-The permittee shall submit notice of an unanticipated bypass as required by the twenty-four hour reporting requirements set forth in this permit.

All reports required by this condition which are submitted after December 20, 2020, shall be submitted by the permittee electronically as 'instructed by MDEQ. [40 CFR.

122.4l(m)(3)(i, ii)]

Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System Entergy Mississippi Inc, Grand Gulf Nuclear Station Facility Requirements Permit Number: MS0029521 Activity ID No.:PER20160001 Page 8 of 42 AI0000002082 Nuclear Power Generation Facility:

Submittal/Action Requirements:

Condition No. Condition S-9 Expiration of Permit At least 180 days prior to the expiration date of this permit pursuant to the State law and regulation, the permi~ee who wishes to continue to operate under this permit shall submit an application to the Permit Board for reissuance. The Permit Board may grant permission to submit an application later than this, but no later than the expiration date of the permit. [11 Miss. Admin. Code Pt. 6, R. 1.1.5.B(l).]

S-10 Requirements Regarding Cooling and Boiler Water Additives Notification shall be made to the permitting authority in writing not later than sixty (60) days prior to initiating the addition of any chemical product to the cooling water a,n<l/or boiler water which is subject to discharge, other than those previously approved and/or used. Such notification should include, but not be limited to:

(1) Name and composition of the proposed additive, (2) Proposed discharge concentration, (3) Dosage addition rates, (4) Frequency ofuse, (5) EPA registration, if applicable, and (6) Aquatic species toxicological data.

Written approval must be received from the permitting authority prior to initiating use. [11 Miss. Admin. Code Pt. 6~ R. l.l.4.A(l4).]

Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System Entergy Mississippi Inc, Grand Gulf Nuclear Station Facility Requirements Permit Number: MS0029521 Activity ID No.:PER2016000 I Page 9 of42 AI0000002082 Nuclear Power Generation Facility:

Narrative Requirements:

Definitions:

Condition No; Condition T-1 Definitions: General The permittee shall refer to 11 Miss. Admin. Code Pt. 6, R. 1.1.1.A for definitions of any permit term not specified in this permit. [11 Miss. Admin. Code Pt. 6, R.

1.1.1.A.] .

T-2 Definitions: Monthly Average "Monthly Average" means the average of "daily discharges" over a calendar month, calculated as the sum of all "daily discharges" measured during a calendar month divided by the number of "daily discharges" measured during the month. The monthly average for E coli bacteria.is the geometric mean of"daily discharges" measured during the calendar month. In computing the geometric mean for E coli bacteria, the value one (1) shall be substituted for sample results of zero. [11 M_iss. Admin. Code*

Pt. 6, R. l.1.l.A(44).]

T-3 Definitions: Daily Discharge "Daily discharge" means the "discharge of a pollutant" measured during a calendar day or any 24-hour period that reasonably represents the calendar day for purposes of sampling. For pollutants with limitations expressed in units of mass, the "daily discharge" is calculated as the total mass of the pollutant discharged over the day. For pollutants with limitations expressed in other units of measurements, the "daily average" is calculated as the average measurement of the discharge of the pollutant over the day. [11 Miss. Admin. Code Pt. 6, R. l.l.l.A(l5).]

• T-4 Definitions: Daily Maximum "Daily maximum" means the highest "daily discharge" over a calendar month. [11 Miss. Admin. Code Pt. 6, R. 1.1.1.A(l 6).]

T-5 Definitions: Toxic Pollutants "Toxic pollutants" means any pollutant listed as toxic under Section 307(a)(l) or, in the case of "sludge use or disposal* practices", any pollutant identified in regulations implementing Section 405(d) oft,he Clean Water Act. [11 Miss. Admin. Code Pt. 6, R. l.1.l.A(71).]

Permit tQ Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System Entergy Mississippi Inc, Grand Gulf Nuclear Station Facility Requirements Pennit Number: MS002952I Activity ID No.:PER20160001 .

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Condition No. Condition T-6 Definitions: Hazardous Substances "Hazardous substances" are defined in 40 CFR 116.4. [40 CFR 116.4]

T-7 Definitions: Quarterly Average "Quarterly Average" means the average of"daily discharges" over a three month period, calculated as the sum of all "daily discharges" measured during the quarter divided by the number of "daily discharges" measured during the quarter. The quarterly average for E coli bacteria is the geometric mean of"daily discharges" measured during the quarter. In computing the geometric mean for E coli bacteria, the value one (I) shall be substituted for sample results of zero. [11 Miss. Admin. Code Pt. 6, R.

1.1.1.A(61).]

T-8 Definitions: Weekly Average "Weekly average" means the average of "daily discharges" over a calendar week, calculated as the sum of all "daily discharges" measured during a calendar week divided by the number of "daily discharges" measured during that week. The weekly average for E coli bacteria is the geometric mean of all "daily discharges".

measured in a calendar week. In computing the geometric mean for E coli bacteria, one (1) shall be substituted for sample results of zero. For self-monitoring purposes, the value to be reported is the single highest weekly average computed during a calendar month. [11 Miss. Admiri. Code Pt. 6, R. l.l.1.A(86).]

T-9 Definitions: Quarterly Maximum "Quarterly Maximum" means the highest "daily discharge" measured over a three-month period. [11 Miss. Admin. Code Pt. 6, R._l.l.1.A(62).]

T-10 Definitions: Maximum Monthly Average Maximum Monthly Average means the highest "monthly average" over a monitoring period. [40 CPR 122]

Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System Entergy Mississippi Inc, Grand Gulf Nuclear Station Facility Requirements Permit Number: MS0029521 Activity ID No.:PER2016000 I Page II of42 AI0000002082 Nuclear Power Generation Facility:

Narrative Requirements:

C_ondition No. Condition T-11 Definitions: Yearly Average "Yearly Average" means the average of daily discharges" over a calendar year, calculated as the sum of all "daily discharges" measured during the calendar year divided by the number of "daily discharges" measured during the calendar year. The-yearly average for E coli bacteria is the geometric mean of "daily discharges" during the calendar year. In computing the geometric mean for E coli bacteria, the value one (I) shall be substituted for sample results of zero. [I I Miss. Admin. Code Pt. 6, R.l.Ll.A(87).]

T-12 Definitions: Yearly Maximum "Yearly Maximum" means the highest "daily discharge" measured over a calendar year. [11 Miss. Admin. Code Pt. 6, R. l.l.l.A(88).]

T-13 Definitions:"Submitted" means the document is postmarked on or before the applicable deadline, except as otherwise specified. [11 Miss. Admin. Code Pt. 6, R. I.I.I.A

{67).]

Condition No. Condition T-14 The permittee shall achieve compliance with the effluent limitations specified for discharge in accordance with the following schedule: Upon Permit Issuance. [11 Miss.

, Admin. Code Pt. 6, R. l.l.4.A(9).)] .

T-15 W:ithin 14 days after either an interim or final date of compliance specified by this permit, the permittee shall provide the Permit Board with written notice of his compliance or noncompliance with the requirements or conditions specified to be completed by that date. [11 Miss. Admin. Code Pt. 6, R. 1.1.4.A(IO).]

T-16 Representative Sampling Samples and measurements taken as required herein shall be representative of the volume ~d nature of the monitored wastewater. [11 Miss. Admin. Code Pt. 6, R.

l. l.4.A(28)(e).] .

Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System Entergy Mississippi Inc, Grand Gulf Nuclear Station Facility Requirements Permit Number: MS0029521 Activity ID No.:PER20160001 Page 12 of 42 AI0000002082 Nuclear Power Generation Facility:

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Condition No. . ~ondition T-17 Reporting If the results for a given sample analysis are such that any parameter (other than E coli) is not detected at or above the minimum level for the test method used, a value of zero will be used for that sample in calculating an arithmetic mean value for the parameter. If the resulting calculated arithmetic mean value for that reporting period is zero, the permittee shall report "NODI = B" on the DMR. For E coli, a value of 1.0 shall be used in calculating the geometric mean. If the resulting E coli mean value is 1.0, the permittee shall report "NODI = B on the DMR. For each quantitative sample value that is not detectable, the test method used and the minimum level forthat method for that parameter shall be attached to and submitted with the DMR. The permittee shall then be considered in compliance with the appropriate effluent limitation and/or reporting requirement. [11 Miss. Admin. Code Pt. 6, Ch. 1, Subch. 2.]

T-18 Reporting If the permittee monitors any pollutant as prescribed in the permit more frequently than required by the permit using test procedures approved under 40 CFR Part 136 or, in the case of sludge use or disposal, approved under 40_CFR Part 136 unless otherwise specified in 40 CFR Part 503, or as specified in the permit, the results of this monitoring shall be included in the calculation and reporting of the data submitted in the DMR or sludge reporting form specified by the Permit Board. [11 Miss.

Admin.. Code Pt. 6, R. l.l.4.A(l5)(c)(2).-]

T-19 Reporting Calculations for all limitations which require averaging of measurements shall utilize an arithmetic mean unless otherwise specified by the Permit Board in the permit.

[11 Miss. Admin. Code Pt. 6, R. 1.1.4.A(15)(c)(3).]

T-20 Test Procedures Test procedures for the analysis of pollutants shall include those set forth in 40 CFR 136 or alternative procedures approved and/or promulgated by EPA. [11 Miss.

Admin. Code Pt. 6, R. 1.l.4.A(30).]

Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System Entergy Mississippi Inc, Grand Gulf Nuclear Station Facility Requirements Permit Number: MS0029521 Activity ID No.:PER20160001 Page 13 of 42 AI0000002082 Nuclear Power Generation Facility:

Narrative Requirements:

Condition No. Condition T-21 Records Retention All records and results of monitoring activities required by this permit, including calibration and maintenance records, shall be retained by the permittee for a minimum of three (3) years, unless otherwise required or extended by the Permit Board, copies of which shall be furnished to the Department upon request. [11 Miss. Admin.

Code Pt. 6, R. l.l.4.A(29)(a).]

T-22 Falsifying Reports Any permittee who falsifies, tampers with, or knowingly renders inaccurate any monitoring device or method required ~y the Permit Board to be maintained as a condition in a permit, or who alters or falsifies the results obtained by such devices or methods and/or any written report required by or in response to a permit condition, shall be deemed to have violated a permit condition and shall be subject to the penalties provided for a violation of a permit condition pursuant to Section 49-17-43 of the Code. [11 Miss. Admin. Code Pt. 6, R. l. l .4.A(29)( d).]

T-23 Facility Expansion and/or Modification Any facility expansion, production increases, process modifications, changes in discharge volume or location or other changes in operations or conditions of the permittee which inay result in .a new or increased discharge of waste, shall be reported to the Permit Board by submission of a new application for a permit pursuant to 11 Miss. Admin. Code Pt. 6, R. I. I .2.A.of the Mississippi Wastewater Regulations, or if the discharge does not violate effluent limitations specified in the permit, by submitting to the Permit Board a notice of a new or increased discharge. [11 Miss. Admin. Code Pt. 6, R. 1.1.2.A.]

T-24 Duty to Comply The permittee must comply with all conditions of this permit. Any permit noncompliance constitutes a violation of the Clean Water Act and is grounds for enforcement a.ction; for permit termination, revocation and reissuance, or modification; or denial of a permit renewal application. [11 Miss. Adm.in. Code Pt. 6, R. l.l.4.A(2).]

Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System Entergy Mississippi Inc, Grand Gulf Nuclear Station

. Facility Requirements Permit Number: MS00295il Activity ID No.:PER20160001 Page 14 of42

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Condition No. Condition T-25 Proper Operation, Maintenance and Replacement

'fhe permittee shall at all times properly operate, maintain, and when necessary, promptly replace all facilities and systems of collection, treatment and control (and related appurtenances) which are installed or used by the permittee to achieve compliance with the conditi,;ms of this permit. Proper operation and maintenance includes adequate laboratory controls and appropriate quality assurance procedures. Proper replacement includes maintaining an adequate inventory of replacement equipment and parts for prompt replacement when necessary to maintain continuous collection and treatment of wastewater. This provision requires the operation ofbac.k-up or auxiliary facilities or similar systems that are installed by a permittee only when the operation is necessary to achieve compliance with the conditions of the permit. [11 Miss. Admin. Code Pt. 6, R. l.l.4.A(l8).]

T-26 Duty to Mitigate The permittee shall take all reasonable steps to II1inimize or prevent any discharge or sludge use or disposal in violation of the permit that has a reasonable likelihood of adversely affecting human health or the environment. [11 Miss. Admin. Code Pt. 6, R. l.l.4.A(l9).)]

T-27 Bypassing The permittee shall comply with the terms and conditions regarding bypass found in 40 CFR 122.41(m). [40 CFR 122.4l(m)]

T-28 Bypassing - Definitions "Bypass" means the intentional diversion of waste streams from any portion of a treatment facility.

"Severe property damage" means substantial physical damage to property, damage to the treatment facilities which causes them to become inoperable, or substantial and permanent loss of natural resources which can reasonably be expected to occur in the absence of a bypass. Severe property damage does not mean economic loss caused by delays'in production. [40 CFR 122.41(m)]

T-29 Bypassing- Bypass not exceeding limitations The permittee may allow any bypass to occur which does not cause effluent limitations to be exceeded, but only if it also is for essential maintenance to assure efficient operation. These bypasses are not subject to the notice and prohibition provisions of the bypass requirements in this permit. [40 CFR 122.41(m)]

Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System Entergy Mississippi Inc; Grand Gulf Nuclear Station Facility Requirements Permit Number: MS0029521 Activity ID No.:PER20160001 Page 15 of 42 AI0000002082 Nuclear Power Generation Facility:

Narrative Requirements:

Condition No. Condition T-30 Bypassing- Prohibition of Bypass

( 1) Bypass is prohibited, and the Commission may take enforcement action against a permittee unless:

(i) Bypass was unavoidable to prevent loss oflife, personal injury, or sever property damage.

(ii) There was no feasible alternatives to the bypass, such as the use ~f auxiliary treatment facilities, retention of untreated wastes, or maintenance during normal periods of equipment downtime. This condition is not satisfied if adequate back~up equipment should have been installed in the exercise ofreasonable engineering judgement to prevent a bypass which occurred during normal periods of equipment downtime or preventative maintenance; and (iii) The permittee submitted notices as required under the Twenty-Four Hour reporting requirements set forth in this permh.

(2) The Commission may approve an anticipated bypass, after considering its adverse affects, if the Commission determines that it will meet the three conditions listed above in paragraph (1) of this permit condition. [40 CFR 122.41(m)]

T-31 Upsets The permittee shall meet the conditions of 40 CFR 122.4l(n) regarding "Upsets" and as in the upset requirements of this permit. [11 Miss. Admin. Code Pt. 6, R.

l.l.4.A(27).]

T-32 Upsets- Definition "Upset" means an exceptional incident in which there is unintentional and temporary noncompliance with technology based permit effluent limitations because of factors beyond the reasonable control of the permittee. An.upset does not include noncompliance to the extent caused by operational error, improperly designed treatment facilities, inadequate treatment facilities, lack of preventive maintenance, or careless or improper operation. [11 Miss. Admin. Code Pt. 6, R. 1. l .4.A(27).]

T-33 Upsets - Effect of an Upset An upset constitµtes an affirmative defense to an action brought for noncompliance with such technology based permit effluent limitations if the "conditions necessary for demonstration of upset" requirements of this permit are met. Any determination made during administrative review of claims that noncompliance was caused by upset, and before an action for noncompliance, shall not constitute final administrative action subject to judiciai review. [11 Miss. Admin. Code Pt. 6, R. l. l.4.A(27).]

Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System Entergy Mississippi Inc, Grand Gulf Nuclear Station Facility Requfrements Permit Number: MS0.029521 Activity ID No.:PER20160001 Page 16 of 42 AI0000002082 Nuclear Power Generation Facility:

Narrative Requirements:

Condition No. Condition T-34 Upsets - Conditions necessary for demonstration of upset A permittee who wishes to establish the affirmative defense of upset shall demonstrate, through properly signed contemporaneous operating logs, or other relevant evidence that: *

(I) An upset occurred and that the permittee can identify the cause(s) of the upset;..,.

(2) The permitted facility was at the time being properly operat~d; (3) The permittee submitted notice of the upset as required in 40 CFR 122.4l(L)(6)(ii)(B)(24-hour notice of noncompliance); and (4) The permittee complied with any remedial measures required under 40 CFR 122.4l(d) (Duty to Mitigate). [11 Miss. Admin. Code Pt. 6, R.l.l.4.A(27).]

T-35 Upsets - Burden of proof In any enforcement proceeding the permittee seeking to establish the occurrence of an upset has the burden of proof. [11 Miss. Ad.min. Code Pt. 6, R. l. l.4.A(27).]

T-36 Removed Substances Solids, sludges, filter backwash, or other residuals removed in the course of treatment or control of wastewater- shall be disposed ofin a manner such as to prevent such materials from entering State waters and in a manner consistent with the Mississippi Solid Waste Disposal Act, the Federal Resource Conservation and Recovery Act, and the Mississippi Water Pollution Control Act. [11 Miss. Admin. Code Pt. 6, R. l.l.4.A(21).]

T-37 Power Failures If electric power is required, in order to maintain compliance with the conditions and prohibitions of the permit, the permittee shall either:

(1) Provide an alternative power source to operate the wastewater control facilities; or, if such alternative power source is not in existence, and no date for its implementation appears in the permit, *

(2) Halt, reduce, or otherwise control production and/or all wastewater flows upon reduction, loss, or failure of the primary source of power to the wastewater control facilities. [11 Miss. Admin. Code Pt. 6, R. l.l.4.A(22).)]

Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System Entergy Mississippi Inc, Grand Gulf Nuclear Station Facility Requirements Permit Number: MS0029521 Activity ID No.:PER20160001 Page 17 of42 AI0000002082 Nuclear Power Generation Facility:

Narrative Requirements:

Condition No. Condition T-38 Inspection and Entry The permittee shall allow any authorized Commission representative to enter the permittee1s premises at any reasonable time, to have access to and copy any applicable records, to inspect process facilities, treatment works, monitoring methods or equipment or to take samples, as authorized by Section 49-17-21 of the Code. In the event of investigation during an emergency response action, a reasonable time shall be any time of the day or night. Follow-up investigations subsequent to the conclusion of the emergency event shall be conducted at reasonable times. [11* Miss. Admin. Code Pt. 6, R. l.l.4.A(l7).]

T-39 Transfer of Ownership or Control This permit is not transferable to any person without proper modification of this permit following procedures found in [11 Miss. Admin. Code Pt. 6, R. 1.1.5 .C.]

T-40 Signatory Requirements All applications, reports, or information submitted to the Permit Board shall be signed and certified. [11 Miss. Admin. Code Pt. 6, R. 1.1.2.C.]

Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System .

Entergy Mississippi Inc; Grand Gulf Nuclear Station Facility Requirements Permit Number: MS0029521 Activity ID No.:PER20160001 Page 18 of 42 AI0000002082 Nuclear Power Generation Facility:

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Condition No. Condition T-41 Signatory Requirements - Application Signatures All permit applications shall be signed as follows:

(1) For a corporation: by a responsible corporate officer. For the purpose of this Section, a responsible corporate officer means: (i) a president, secretary, treasurer or vice president of the corporation in charge of a principal business function, or any other person who performs similar policy - or decision-making function for the corporation, or (ii) the manager of one or more manufacturing, production, or operating facilities provided, the manager is authorized to make management decisions which govern the operation of the regulated facility including having the explicit or implicit duty of making major capital investment recommendations, and initi.ating and directing other comprehensive measures to assure long term environmental compliance with environmental laws and regulations; the manager can ensure that the necessary systems are established or actions taken to gather complete and accurate information for permit application requirements; and where authority to sign documents has been assigned or delegated to the manager in accordance with corporate procedures.

• (2) For a partnership or sole proprietorship: by a general partner or the proprietor, respectively; or (3) For a municipality, State, Federal, or other public agency: by either a principal executive officer or ranking elected official. [11 Miss. Admin. Code Pt. 6, R. 1.1.2.C.]

T-42 Signatory Requirements -Reports and Other Information All reports required by the permit and other information requ~sted by the Permit Board shall be signed by a person described by the application signature requirements in this permit or by a duly authorized representative of that person. A person is a duly authorized representative only if:

( 1) The authorization is made in writing by a person described by the application signature requirements; .

(2) The authorization specifies either an individual or a position having responsibility for the overall operation of the regulated facility or activity, such as the position of plant manager, operator of a well or a wen* field, superintendent, position having overall responsibility for environmental matters for the company. (A duly authorized representative may thus be either a named individual or any individual occupying a named position.); and (3) The written authorization is submitted to the.Permit Board. [11 Miss. Adm.in. Code Pt. 6, R. 1.1.2.c.]*

Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System

• ~ntergy Mississippi Inc, Grand Gulf Nuclear Station Facility Requirements Permit Number: MS002952 I Activity ID No.:PER20I60001 Page 19 of 42 AI0000002082 Nuclear Power Generation Facility:

Narrative Requirements:

Condition No. Condition

• T-43 Signatory Requirements - Changes to Authorization I

If an authorization under the signatory requirements of this permit is no longer accurate because a different individual or position has responsibility for the overall operation of the facility, a new authorization satisfying the signatory requirements of this permit must be submitted to the Permit Board prior to or together with any reports, information, or applications. [I I Miss. Admin. Code Pt. 6, R. 1.1.2.C.]

T-44 Signatory Requirements - Certification Any person signing a document under the signatory requirements stated in this permit shall make the following certification:

"I certify under penalty of law that this document and all attachments were prepared under the 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 infor_mation, including the possibility of fine and imprisonment for knowing violations. [11 Miss. Admin. Code Pt. 6, R. 1.1.2.C.]

T-45 Availability .of Records Except for information deemed to be confidentiai under the Mississippi Code Ann. 49-17-39 and 40 CFR 123.41, file information relating to this permit shall be made available for public inspection and copying during normal business hours at the office of the Department of Environmental Quality in Jackson, Mississippi. Written request must be provided in accordance with policies developed by the Commission and must state, specifically, records proposed for review, date proposed for review and copying requirements. [11 Miss. Admin. Code P~ 6, R. 1.1.3.E.] .

T-46 Duty to Provide Information The permittee shall furnish to the Permit Board within a reasonable time any relevant information which ¢.e Permit Board may request to determine whether cause exists for modifying, revoking and reissuing, or terminating the permit, or to determine compliance with the permit. The permittee shall also furnish to the Permit Board upon request, copies ofrecords required to be kept by the permit. [11 Miss. Admin. Code Pt. 6, R. l.l.4.A(l6).]

Permit to Discharge Wastewater in Accordan-ce with National Pollutant Discharge Elimination System Entergy Mississippi Inc, Grand Gulf Nuclear Station Facility Requirements Permit Number: MS0029521 Activity ID No.:PER20160001 Page20 of42 AI0000002082 Nuclear Power Generation Facility:

Narrative Requirements:

Condition No. Condition T-47 Toxic Pollutants The permittee shall comply with any toxic effluent standard or prohibition (including any schedule of compliance specified in such effluent standard or prohibition) established under Section 307(a) of the Federal Water Pollution Control Act. [11 Miss. Admin. Code Pt. 6, R. l.l.4.A(26).]

T-48

• Toxic Pollutants Notification Requirements The permittee shall comply with the applica6le provisions of 40 CFR 122.42. [11 Miss. Admin. Code Pt. 6, R. l.l.4.A(26).]

T-49 Civil and Criminal Liability (I) Any person who violates a term, condition or schedule of compliance contained within this permit or the Mississippi Water Pollution Control Law is subject to the actions defined by law.

(2) Except as provided in permit conditions on "Bypassing" and "Upsets", nothing in this permit shall be construed to relieve the permittee from civil or criminal penalties for noncompliance.

(3) It shall not be the defense of the permittee in an enforcement action that it would have been necessary to halt or reduce the permitted activity in order to maintain compliance with the conditions of this permit. [11 Miss. Admin. Code Pt. 6, R. 1. l.4.A(24).)]

T-50 Oil and Hazardous Substance Liability Nothing in this permit shall be construed to preclude the institution of any legal action or relieve the permittee from any responsibilities, liabilities, or penalties to which the permittee is or may be subject to under Section 311 of the Federal Water Pollution Control Act and applicable provisions under Mississippi Law pertaining to transportation, storage, treatment, or spillage of oil or hazardous substances. [11 Miss. Admin. Code Pt. 6, R. l. l .4.A(23).]

T-51 Property Rights -

The issuance of this permit does not convey any property rights in either real or personal property, or any exclusive privileges, nor does it authorize any injury to private property or any invasion ofpersonal"rights, nor any infringement of Federal, State, or local laws or regulations. [11 Miss. Admin. Code Pt. 6, R. 1.1.5.

E.]

Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System Entergy Mississippi Inc, Grand Gulf Nuclear Station Facility Requirements Pennit Number: MS002952 l Activity ID No.:PER20160001 Page21 Qf42 AI0000002082 Nuclear Power Generation Facility:

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Condition No. Condition T-52 Severability The provisions of this permit are severable. If any provision of this permit, or the application of any provision of this pennit to any circumstances, is challenged or held invalid, the validity of the remaining permit provisions and/or portions thereof or their application ta* other persons or sets of circumstances, shall not be affected thereby. [11 Miss. Admin. Code Pt. 6, R. Ll.4.A(25).]

T-53 Protection of Confidential Information (1) Pursuant to Miss. Code Ann.' 49-17-39 and 40 CFR 123.41, the Permit Board shall make available to the public all information contained on any form and all public comments on such information. Effluent data and information concerning air or water quality shall also be made available to the public. Infonnation that is determined by the Commission to be trade secrets shall not be disclosed to the public without prior consent of the source of such information. When a claim of confidentiality is

• made by a person in accordance with the provisions of Miss. Code Ann.' 49-17-39, a recommendation on the questions of confidentiality shall be made by the Commission and forwarded to the Regional Administrator (or his/her designee) of EPA for his concurrence in such determination of confidentiality. [11 Miss: Admin.

Code Pt. 6, R. 1.1.3.F.]

T-54 Protection of Confidential Information- continued (2) A copy of a State, UIC, or NPDES permit application, public notice, fact sheet, draft permit and other forms relating thereto, including written public comment and other reports, files and information relating to the application not classified as confidential infonnation by the Commission pursuant to part (1) of this requirement, shall be available for public inspection and copying during normal business hours at the office of the Department in Jackson, Mississippi. [11 Miss. Admin. Code Pt. 6, R.

1.1.3.F.]

Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System Entergy Mississippi Inc, Grand Gulf Nuclear Station Facility Requirements Pennit Number: MS0029521 Activity ID No.:PER20160001 Page 22 of42 AI0000002082 Nuclear Power Generation Facility:

Narrative Requirements:

Condition No. Condition T-55 Protection of Confidential Information- continued (3) Upon detennination by the Commission that information submitted by a pennit applicant is entitled to protection against disclosure as trade secrets, the information shall be so labeled and otherwise handled as confidential. Copies of the information and a notice of the Commission's action shall be forwarded to the Regional Administrator (or his/her designee ). In making its detennination of entitlement to protection as a trade secret, the Commission shall follow the procedure set forth in Miss. Code Ann. '49-17-39. In the event the Commission denies the claim of confidentiality, the applicant shall have, upon notification thereof, the right to appeal the Commission's determination in the same manner provided for other orders of the Commission. No disclosure, except to EPA, shall be allowed until any appeal from the

• determination of the Commission is completed. [11 Miss. Admin. Code Pt. 6, R. 1.1.3.F :]

T-56 Spill Prevention and Best Management Plans Any permittee which has above ground bulk storage capacity, of more than 1320 gallons or any single .container with a capacity greater than 660 gallons, of materials and/or liquids (including but not limited to, all raw, finished and/or waste material) with chronic or acute potential for pollution impact on waters of the State and not subject to Mississippi Hazardous Waste Management Regulations or 40 CFR 112 (Oil Pollution Prevention) regulations shall provide secondary containment as found in 40 CFR 112 or equivalent protective measures such as trenches or waterways which would conduct any tank releases to a permitted treatment system or sufficient equalization or treatment capacity needed to prevent chronic/acute pollution impact. [11 Miss. Admin. Code Pt. 6, R. 1.1.4.A( 12)(a).]

T-57 Reopener Clause This permit shall be modified, or alternately, revoked and reissued, to comply with any applicable effluent standard, limitation or storm water regulation issued or approved under Section 301(b)(2)(C), and (D), 304(b)(2), 307(a}(2) and 402(p) of the Federal Water Pollution Control Act if the effluent standard, limitation or regulation so issued or approved: *

1. Contains different conditions or is otherwise more stringent than any effluent limitation in the permit; or

2. Controls any pollutant not limited in the permit. ,, .

3. This permit shall be modified to reflect any additional or otherwise more stringent limitations and additional monitoring as determined to be necessary by the results ofa Completed TMDL. [11 Miss. Admin. Code Pt. 6, R. 1.1.4.F(l).]

• Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination Syst~m Entergy Mississippi Inc, Grand Gulf Nuclear Station Facility Requirements Permit Number: MS0029521 Activity ID No.:PER20160001 Page23 of42 AI0000002082 Nuclear Power Generation Facility:

Narrative Requirements:

Condition No. Condition T-58 Closure. Requirements Should the permittee decide to permanently close and abandon the premises upon which it operates, it shall provide a Closure Plan to the Permit Board no later than 90 days prior to doing so. This Closure Plan shall address how and when all manufactured products, by-products, raw materials, stored chemicals, and solid and liquid waste and residues will be removed from the premises or permanently disposed of on site such that no potential environmental hazard to the waters of the State will be presented. Closure plan(s) submitted to and approved by Mississippi Department of Environmental Quality for compliance with other environmental regulations will satisfy*the closure requirements for those items specifically addressed in the closure plan(s) as long as the closure does not present a potential for environmental hazard to waters of the State. [11 Miss. Admin. Code Pt. 6, R. 1.1.4.A(l l).]

T-59 Permit Actions The permit may be modified, revoked and reissued, or terminated for cause. The filing of a request by the permittee for a permit mo~ification, revocation and reissuance, or termination, or a modification of planned changes or anticipated noncompliance, does not stay any permit condition. [11 Miss. Admin. Code Pt. 6, R. l.l.5.C(5).]

T-60 Samples for the parameters listed below should be analyzed using the following methods or their approved equivalent:

Parameter Method* Minimum Level Copper, Total Recoverable 200.8 0 .5 micrograms/L Zinc, Total Recoverable 200.8 10 micrograms/L lead Total Recoverable 200.8 0.5 micrograms/L Iron, Total Recoverable 200.8 0.5 micrograms/L Nickel, Total Recoverable 200.8 0.5 micrograms/L. [11 Miss. Admin. Code Pt. 6, R. 1.1.4.A(4)]

Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System Entergy Mississippi Inc, Grand Gulf Nuclear Station.

Facility Requirements Permit Number: MS002952 l Activity ID No.:PER20160001 Page 24 of42 RPNTOOOOOOOOOl (MS0029521-001) Outfall 001 (Discharge/Mixing Basin discharge. Effluent consists of wastewater from the internal Outfalls 002, 004, 005, 006, and 011 and cl,ischarges to the Mississippi River) - EXTERNAL:

Monitoring Requirements:

Condition No. Parameter Condition M-1 Chlorine, free available Chlorine, free available: During outages when the Natural Draft and Auxiliary Cooling Tower has no load and the Plant Service Water (PSW) bypasses the tower and discharges directly to the Discharge Basin through Outfall 001, the free available chlorine (F AC) limitations shall be imposed on this outfall.

• If the PSW does not bypass the tower, the permittee shall indicate conditional monitoring (not required this period) *by including the No Data Indicator Code NODI=9 on their monthly discharge monitoring report. [11 Miss. Admin. Code Pt. 6, Ch. 1, Subch. 1. l.l.4.A(4)].

M-2 Chlorine, free available Chlorine, free available: FAC shall be monitored continuously with multiple grab samples taken every 30 minutes following commencement of the bypass and continuing until chlorine is no longer detectable. [11 Miss. Admin. Code Pt. 6, R.

l.l.4.A.28(a)]

M-3 Chlorine, free available Chlorine, free available: If the permittee does not utilize chlorination, the pennittee shall indicate conditional monitoring (not required this period) by including the No Data Indicator Code NODI=9 on their monthly discharge monitoring report (DMR).

[11 Miss. Admin. Code Pt. 6, R. l.1.4.A.28(a)]

\

M-4 Flow Flow: The pennittee may use data from either the continuous monitors/re~orders or the Balance of Plant Computer System.

[11 Miss. Admin. Code Pt. 6, R. 1.l.4.A.28(a)]

M-5 Temperature (Deg: F) Temperature (Deg. F): The permittee may use data from either the continuous monitors/recorders or the Balance of Plant Computer System. [11 Miss. Admin. Code Pt. 6, R. l.l.4.A.28(a)]

M-6 Chlorination Duration Chlorination Duration: FAC may not be discharged from any up.it for more than two hours in any one day unless the utility*

can demonstrate to the Permit Board that discharging for more than two hours is required for macro invertebrate control.

When units are chlorinated simultaneously, the chlorination period may not exceed two hours. [40 CFR 423.13.(d)(2)]

Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System Entergy Mississippi Inc, Grand Gulf Nuclear Station Facility Requirements Permit Number: MS0029521 Activity ID No.:PER20160001 Page 25 of 42*

RPNTOOOOOOOOOl (MS0029521-001) Outfall 001 (Discharge/Mixing Basin discharge. Effluent consists of wastewater from the internal Outfalls 002, 004, 005, 006, and 011 and discharges to the Mississippi River) - EXTERNAL:

M~nitoring Requirements:

Condition No. Parameter Condition M-7 Samples taken in compliance with the effluent limitations and monitoring requirements of this permit shall be taken at the nearest accessible point following confluence of all waste waters permitted for discharge at Outfall 001, but prior to entering or mixing with the receiving waters. However, when the Balance of Plant Computer System is utilized to monitor flow and temperature, the samples for each permitted wastewater stream shall be taken after final treatment but prior to entering or mixing with the receiving waters. [11 Miss. Admin. Code Pt. 6, R. l.l.4.A(4)]

Submittal/Action Requirements:

Condition No. Condition S-1 The Permittee shall submit analytical results on a monthly Discharge Monitoring Report (DMR): Due monthly, by the 28th of the subsequent month. [11 Miss. Admin.

Code Pt. 6, R. l.l.4.A.15(c)]

Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System Entergy Mississippi Inc, Grand GulfNuclear Station Facility Requirements Permit Number: MS0029521 Activity ID No.:PER20160001 Page26 of42 RPNT0000000002 (MS0029521-002) Outfall 002 (Natural Draft and Auxiliary Cooling Tower Blowdown) - INTERNAL:

Limitation Requirements:

Condition No. Parameter Condition L-1 Neither free available chlorine (F AC) nor total residual chlorine (TRC) may be discharged from any unit for more than two hours in any one day and not more than one unit may discharge FAC or TRC at any one time. The exact time of discharge of FAC or TRC shall be recorded for each unit and reported with the discharge monitoring report (DMR). [40 CFR 423.13.(d)

(2)] .

L-2 The addition of any chemical product to the cooling water other than those submitted with the application is prohibited unless prior written approval is obtained in accordance with condition S-9 on page 7 of this permit. Chemicals used for the maintenance of cooling water chemistry, or.otherwise permitted to operate or maintain the cooling water system shall not cause a violation of the terms and conditions cont~ined in condition S-1 on page 5 of this permit. [11 Miss. Admin. Code Pt.

6,R. l.l.4.A(4)] *t Monitoring Requirements:

Condition No. Parameter Condition M-1 Chlorine, free available Chlorine, free available: Shall be monitored utilizing multiple grab samples. Multiple grab samples shall consist of one grab sample taken every 30 minutes following start-up of blowdown (after chlorine addition) and ending when F AC is no longer detectable. [11 Miss. Admin. Code Pt. 6, R. l.l.4.A.28(a)]

• M-2 Start-up ofblowdown shall not occur until a series of instantaneous readings indicate that the discharge is in conformance with the permit limitations. [11 Miss. Admin. Code Pt. 6, R. 1.1.4.A(4)]

M-3 Samples taken in compliance with the effluent limitations and monitoring requirements of this permit shall be taken at the riearest accessible point following blowdown, but prior to mixing with any other wastewaters with the exception of the Treated Liquid Rad wastewater discharged through Outfall 011, which may mix with the discharge from Outfall 002 prior to sample collection. [11 Miss. Admin. Code Pt. 6, R. l. l.4.A.28(a)]

Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System Entergy Mississippi Inc, Grand Gulf Nuclear Station Facility Requirements Permit Number: MS0029521 Activity ID No.:PER20160001 Page27 of42 RPNT0000000002 (MS0029521-002) Outfall002 (Natural Draft and A,uxiliary Cooling Tower Blowdown)- INTERNAL:

Submittal/Action Requirements:

Condition No. Condition S-1 The Permittee shall submit analytical results on a monthly Discharge Monitoring Report (DMR) : Due monthly, by the 28th of the subsequent month. [11 Miss. Admin.

Code Pt. 6, R. 1.1.4.A.15(c)]

Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System Entergy Mississippi Inc, Grand GulfNuclear Station

• Facility Requirements Permit Number: MS0029521 Activity ID No.:PER20160001 Page 28 of42 RPNT0000000003 (MS0029521-004) Outfall 004 (Unit A Standby Service Water Cooling Tower Blowdown)-INTERNAL:

Limitation Requirements:

Condition No. Parameter Condition L-1 The addition 'of any chemical product to the cooling water other than those submitted with the application is prohibited unless prior written approval is obtained in accordance with condition S-10 on page 8 of this permit. Chemicals used for the maintenance of cooling water chemistry, or otherwise permitted to operate or maintain the cooling water system shall not cause a violation of the terms and conditions contained in condition S-1 on page 5 of this permit. [11 Miss. Admin. Code Pt.

6, R. 1.1.4.A(a)]

L-2 Neither Free available chlorine (F AC) nor total residual chlorine (TRC) may be discharged from any unit for more than two hours in any one day and not more than one unit may discharge F AC or TRC at any one time. The exact time of discharge of FAC or TRC shall be recorded for each unit and reported with the discharge monitoring report (DMR). [11* Miss. Admin.

Code Pt. 6, Ch. 2. l.l.4.A(4), 40 CFR 423.13.d(2)]

Monitoring ~equirements:

Condition

°l'J'o. Parameter Condition M-1 Chlorine, free available Chlorine, free available: Multiple grab samples shall consist of a series of grab samples taken every 30 minutes following startup ofblowdown after chlorine addition unti1 no chlorine is detectable. [11 Miss. Admin. Code Pt.-6, R. l.l.4.A.28(a)]

M-2 Chlorine, fr~e available Chlorine, free available: Monitoring shall be performed daily whenever a batch is discharged. Initiation of discharge shall not occur until a series of instantaneous readings indicate the discharge shall be in compliance with permit limitations. [11 Miss.

Admin. Code Pt. 6, R. 1.l.4.A(4)l M-3 Flow Flow: The flow reported shall be the total volume discharged in a 24-hour period. [11 Miss. Adm'in. Code Pt. 6, R. 1.1.4.A.28 (a)]

Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System Entergy Mississippi Inc, Grand Gulf Nuclear Station Facility Requirements Permit Number: MS0029521 Activity IIJ No.:PER20160001 Page 29 of42 RPNT0000000003 (MS0029521-004) Outfall 004 (Unit A Standby Service Water Cooling Tower Blowdown)-INTERNAL:

Monitoring Requirements:

Condition No. Parameter Condition M-4 Zinc (Total Recoverable) Zinc{Total Recoverable): Composite* Sampling:

If the basin has been recirculated for a time frame ofno less than four (4) hours to allow for adequate mbdng within each quadrant, a composite will be defined as the combined sample of the four (4) grab samples from each quadrant of the basin.

If the basin is not recirculated for a sufficient period of time to allow for adequate mbdng within the quadrants, a composite will be defined as the combined sample of the three (3) individual samples collected at the-beginning, middle and end of the discharge for each batch discharge. [11 Miss. Admin. Code Pt. 6, R. l.l.4.A(4)]

M-5 Chlorination Duration Chlorination Duration: Monitoring shall be performed daily whenever a batch discharge occurs. Initiation of a discharge shall not occur until a series of instantaneous readings indicate the discharge shall be in compliance with permit limitations. [11

. Miss. Admin. Code Pt. 6, R. 1.1.4.A(4)]

M-6 Samples taken in compliance with the effluent limitations and monitoring requirements of this permit shall be taken at the nearest accessible point following blowdown, but prior to mixing with any other wastewaters. [11 Miss. Admin. Code Pt. 6, R. l.l.4.A(28)] ' .

Submittal/Action Requirements:

Condition No. Condition S-1 The Pemiittee shall submit analytical results on a monthly Discharge Monitoring Report (DMR): Due monthly, by the 28th of the subsequent month. [11 Miss. Admin.

Code Pt. 6, R. 1. l.4.A.15(c)]

Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System Entergy Mississippi Inc, Grand Gulf Nuclear Station Facility Requirements Permit Number: MS0029521 Activity ID No.:PER20160001 Page.30 of 42 RPNT0000000003 (MS0029521-004) Outfall 004 (Unit A_Standby Service Water Cooling Tower Blowdown) - INTERNAL:

' \ .

Narrative Requirements:

Condition No. Condition T-1 Upon commencement of discharge from Outfall 004, the permittee shall collect one effluent sample from this outfall and test for the Part A and Part B pollutants listed on the EPA Application Form 2C, Item V. The pennittee shall submit a completed EPA Application Form 2C, Item V no later than the 28th day of the month following the completion of the effluent sampling. For Part A pollutants, the application must contain the results of at least one analysis done for each pollutants listed in Part A.

For Part B pollutants, the application must contain analysis results of at least one analysis taken for each parameter in Part B that is believed present. This permit may be reopened and modified if data indicates a violation of water quality standards for any of the above mentioned parameters. [11 Miss. Admin. Code Pt. 6, R. l.l.4.A(4)]

Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System Entergy Mississippi Inc, Grand Gulf Nuclear Station Facility Requirements Permit Number: MS0029521 Activity ID No.:PER20160001 Page 31 of 42 RPNT0000000004 (MS0029521-005) Outfall 005 (Unit B Standby Service Water Cooling Tower Blowdown) - INTERNAL:

Limitation Requirements:

Condition

-:N"o. Paranieter Condition L-1 The addition of any chemical product to the cooling water other than those submitted with the application is prohibited unless prior written approval is obtained in accordance with condition S-9 on page 7 of this permit. Chemicals us.ed for the

_maintenance of cooling water chemistry, or otherwise permitted to operate or maintain the cooling water system shall not cause a violation of the terms and conditions contained in condition S-1 on page 5 of this permit. [11 Miss. Admin. Code Pt.

6, R. l.l.4.A(4)]

L-2 Neither Free available chlorine (F AC) nor total residual chlorine (TRC) may be discharged from any unit for more than two hours in any one day and not more than one unit may discharge FAC or TRC at any one time. The exact time of discharge of FAC or TRC shall be recorded for each unit and submitted with the discharge monitoring report (DMR). [11 Miss. Ad.min.

Code Pt. 6, R. 1.1.4.A(4), 40 CFR 423.13.d(2)]

Monitoring Requirements:

Condition No. Parameter Condition M-1 Chlorine, free available Chlorine, free available: Sample Type Multiple grab samples shall consist of a series of grab samples taken every 30 minutes following startup of blowdown after chlorine addition until no chlorine is detectable. [11 Miss. Admin. Code Pt. 6~ R. l.l.4.A(4)]

M-2 Chlorine, free available Chlorine, free available:. Monitoring shall be performed daily whenever a batch discharge occurs. Initiation of a discharge shall not occur until a series of instantaneous readings indicate the discharge shall be in compliance with permit limitations.

[11 Miss. Admin. Code Pt. 6, R. l.l.4.A(4)]

Flow Flow: The Flow reported shall be the total volume discharged in a 24-hour period. [11 Miss. Admin. Code Pt. 6, R. 1.1.4.A (4)]

Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System Entergy Mississippi Inc, Grand Gulf Nuclear Station Facility Requirements Permit Number: MS0029521 Activity ID No.:PER20160001 Page 32 of42 RPNT0000000004 (MS0029521-005) Outfall 005 (Unit B Standby Service Water Cooling Tower Blowdown)-INTERNAL:

Monitoring Requirement~:

Condition No. Parameter Condition M-4 Zinc (Total Recoverable) Zinc (Total Recoverable): Composite Sampling If the basin has b_een recirculated for a time frame ofno less than four (4) hours to allow for_adequate mixing within each quadrant, the composite sample will be defined as the combined sample of the four (4) grab samples from each quadrant of the basin.

• If the basin is not recirculated for a sufficient period oftime to allow for adequate mixing within the quadrants;a composite will be defined as the combined sample of the three (3) individual samples collected at the beginning, middle and end of the discharge for each batch discharge. [11 Miss. Admin. Code Pt. 6, R. l.l.4.A(4)]

M-5 Chlorination Duration Chlorination Duration: Monitoring shall be performed daily whenever a batch discharge occurs. Initiation of a discharge shall not occur until a series of instantaneous readings indicate the discharge shall be in compliance with permit limitations. [11 Miss. Admin. Code Pt. 6, R. l.l.4.A(4)]

M-6 Samples taken in compliance with the effluent limitations and monitoring requirements of this permit shall be taken at the nearest accessible point following blowdown, but prior to mixing with any other wastewaters. [11 Miss. Admin. Code Pt. 6, R. l. l.4.A(28)] .

Submittal/Action Requirements:

Condition No. Condition S-1 The Permittee shall submit analytical results on a monthly Discharge Monitoring Report (DMR) : Due monthly, by the 28th of the subsequent month. [11 Miss. Admin.

Code Pt. 6, R. 1.l.4.A.15(c)]

• Permit to Discharge Wastewater in Accordance with National Pollu~ant Discharge Elimination System Entergy Mississippi Inc, Grand Gulf Nuclear Sta,tion

• Facility Requirements

. Permit Number: MS0029521 Activity ID No.:PER20160001 Page 33 of 42 RPNT0000000004 (MS0029521-00S) Outfall 005 (Unit B Standby Service Water Cooling Tower Blowdown)- INTERNAL:

Narrative Requirements.;.

Condition No. Condition Upon commencement of discharge from Outfall 005, the permittee shall collect one effluent sample from this outfall and test for the Part A and Part B pollutants listed on the EPA Application Form 2C, Item V. The permittee shall submit a completed EPA Application Form 2C, Item V no later than the 28th day of the month following the completion of the effluent sampling. For Part A pollutants, the application must contain the results of at least one analysis done for each pollutants listed in Part A.

For Part B pollutants, the application must contain analysis results of at least one analysis taken for each parameter in Part B that is believed present. This permit may be reopened and modified if data indicates a violation of water quality standards for any of the above mentioned parameters. [11 Miss. Admin. Code Pt. 6, R. l.l.4.A(4)]

Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System Entergy Mississippi Inc, Grand Gulf Nuclear Station Facility Requirements Permit Number: MS002952 l Activity ID No.:PER20160001 Page 34 of 42 RPNT0000000005 (MS0029521-006) Outfall 006 (Treated low volume wastes consisting of demineralizer wastewater, carbon filter backwash, and Water Treatement Building sump wastewater) - INTERNAL:

• Monitoring Requirements:

Condition No. Parameter Condition M-1 Flow Flow: The Flow reported shall be the total volume discharged in a 24-hour period. [11 Miss. Admin. Code Pt. 6, R. 1.1.4.A (4)]

M-2 Samples tak~n in compliance with the effluent limitations and monitoring requirements of this permit shall be taken at the nearest accessible point following final treatment, bµt prior to mixing with any other wastewaters. [11 Miss. Admin. Code Pt.

6, Ch. 1, Subch. 1. IV.A(28)]

SubmittaVAction Requirements:

Condition No. Condition S-1 The Permittee shall submit analytical results on a monthly Discharge Monitoring Report (DMR) : Due monthly, by the 28th of the subsequent month. [11 Miss. Admin.

Code Pt. 6, R. l.l.4Al5(c)]

Narrative Requirements:

Condition No. Condition T-1 Upon commencement of discharge from Outfall 006, the permittee shall collect one effluent sample from this outfall and test for the Part A and Part B pol_lutants listed on the EPA Application Form 2C, Item V. The permittee shall submit a completed EPA Application Form 2C, Item V no later than the 28th day of the month following the completion of the effluent sampling. For Part A pollutants, the application must contain the results of at least one analysis done for each pollutants listed in Part A.

For Part B pollutants, the application must contain analysis results of at least one analysis taken for each parameter in Part B that is believed present. This permit may be reopened and mqdified if data indicates a violation of water quality standards for any of the above mentioned parameters. [11 Miss. Admin. Code Pt. 6, R. 1.1.4.A(4)]

Permit to Discharge ~astewater in Accordance with National Pollutant Discharge Elimination System

• Entergy Mississippi Inc, Grand Gulf Nuclear Station Facility Requirements PermitNumber: MS002952 l Activity ID No.:PER20160001 Page 35 of 42 RPNT0000000006 (MS0029521-007) Outfall 007 (Low volume waste discharge consisting of miscellaneous wastewaters discharged into Sediment Basin B. The wastewater is comprised of Administrative Building drains, yard and storm drains, fire water pump house, oily waste sumps, ionics reject water, Turbine Building cooling water blowdown, HVAC cooling tower wastewater, HVAC once-through cooling, outage air compressor once-through cooling, intermittent standby service water, plant service water leakage and small releases) - INTERNAL:

Monitoring Requirements:

Condition No. Parameter Condition Samples taken in compliance with the effluent limitations and monitoring requirements of this permit shall be taken at the most accessible point following confluence of all separate wastewater streams, which discharge at the East Wing Wall but prior to entering or mixing with the waters in Sediment Basin B. [11 Miss. Admin. Code Pt. 6, R. l. l .4.A(28)]

Submittal/Action Requirements:

Condition No. Condition S-1 The Permittee shall submit analytical results on a monthly Discharge Monitoring Report (DMR): Due monthly, by the 28th of the subsequent month. [11 Miss. Admin.

Code Pt. 6, R. 1.l.4.A.15(c)]

Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System Entergy Mississippi Inc, Grand Gulf Nuclear Station Facility Requirements Permit Number: MS0029521 Activity ID No.:PER20160001 Page 36 of 42 RPNT0000000007 (MS0029521-010) Outfall 010 (Total facility treated sanitary wastewater discharged to Basin A)-INTERNAL:

Monitoring Requirements:

Condition No. Parameter Condition M-1 Samples taken in compliance with the effluent limitations and monitoring requirements of this permit shall be taken at the nearest accessible point inclusive of all wastewaters permitted for discharge at Outfall 010, but prior to entering or mixing with Basin A. [11 Miss. Admin. Code Pt. 6, R. l.l .4.A(28)]

Submitta~Action Requirements:

Condition No. Condition S-l The Permittee shall submit analytical results on a monthly Discharge Monitoring Report (DMR): Due monthly, by the 28th of the subsequent month. [11 Miss. Ad.min.

Code Pt. 6, R. 1.1.4.A.lS(c)] .

Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System Entergy Mississippi Inc, Grand Gulf Nuclear Station Faci"lity Requirements Permit Number: MS0029521 Activity ID No.:PER20160001 Page 37 of 42 RPNTOOOOOOOOOS (MS0029521-011) Outfall 011 (Low Volume Wastes discharge consisting of ion exchange wastewater from the liquid radwaste treatment system, floor drains, and lab drains)- INTERNAL:

• Monitoring Requirements:

Condition No. Parameter Condition M-1 Samples taken in compliance with the effluent limitations and monitoring requirements of this permit shall be taken at the nearest accessible point following final treatment, but prior to entering for mixing with any other wastewaters. [ 11 Miss.

Admin. Code Pt. 6, R. l.l.4.A(28)]

Submittal/Action Requirements:

Condition No. Condition S-1 The Pe!fflittee shall submit analytical results on a monthly Discharge Monitoring Report (DMR): Due monthly, by t4e 28th of the subsequent month. [11 Miss. Admin.

Code Pt. 6, R. 1.1.4.A.IS(c)]

Narrative Requirements:

Condition No. Condition T-1 Upon commencement of discharge from Outfall O11, the permittee shall collect one* effluent sample from this outfall and test for the Part A and Part B pollutants listed on the EPA Application Form 2C, Item V. The permittee shall submit a completed EPA Application Form 2C, Item V no later than the 28th day of the.month following the completion of the effluent sampling. For Part A p91lutants, the application must contain the results of at least one analysis done for each pollutants listed in Part A.

For Part B pollutants, the application must contain analysis results of at least one analysis taken for each parameter in Part B that is believed present. This permit may be reopened and modified if data indicates a violation of water quality standards for any of the above mentioned parameters. [11 Miss. Admin. Code Pt. 6, R. l.l.4.A(4)]

T-2 The radioactive comp<ment ofthis discharge is regulated by the Nuclear Regulatory Commission (NRC). [11 Miss .. Admin. Code Pt. 6, R. 1.1.4.A(4), 40 CPR 401.11.f]

Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System

• Entergy Mississippi Inc, Grand Gulf Nuclear Station Facility Requirements Permit Number: MS0029521 Activity ID No.:PER20160001 Page 38 of 42 RPNT0000000009 (MS0029521-013) Outfall 013 (Treated effluent from Basin A that enters an Unnamed Tributary thence into Hamilton Lake.

Contributing sources ofwastewaters include stand by service water leakage, storm water runoff, and the combined discharge oflnternal Outfalls 010 and 016)- EXTERNAL:

Monitoring Requirements:

Condition No. Parameter Condition M-1 Samples taken in compliance with the effluent limitations and monitoring requirements of this permit shall be taken at the nearest accessible point following final treatment, but prior to entering for mixing with the receiving stream. [11 Miss.

Admin. Code Pt. 6, R. Ll.4.A(28)]

Submittal/Action Requirements:

Condition

• No. Condition S-1 The Permittee shall submit analytical results on an annual Discharge Monitoring Report (DMR) : Due annually by the 28th of January. [11 Miss. 'Admin. Code Pt. 6, R.

l.l.4.A.15(c)] . .

S-2 The Permittee shall submit analytical results on a quarterly Discharge Monitoring Report (DMR): Due quarterly, by the 28th of Jan, April, July, and Oct. [11 Miss.

Admin. Code Pt. 6, R. l.l.4.A.15(c)]

Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System Entergy Mississippi Inc, Grand Gulf Nuclear Station Facility Requirements Permit Number: MS0029521 Activity ID No.:PER20160001 Page 39 of 42 RPNT0000000009 (MS0029521-013) Outfall 013 (Treated effluent from Basin A that enters an Unnamed Tributary thence into Hamilton Lake.

Contributing sources of wastewaters include stand by service water leakage, storm water runoff, and the combined discharge oflnternal Outfalls 010 and 016)- EXTERNAL:

Narrative Requirements:

• condition No. Condition T-1 The parameter listed below shall be monitored once per month when discharging, utilizing 24-hour composite sampling, until 12 samples have been collected. Once the data is collected, the permittee shall submit a report summarizing the results of each sampling event. The reports shall be submitted to the MDEQ to the attention of the Environmental Permits Division (EPD) on the 28th day of the month following the completion of the effluent sampling. Based on the effluent monitoring results, the permit may be modified to reflect any additional or more stringent limitations and monitoring requirements.

Parameter Iron, Total Recoverable Copper, Total Recoverable Lead, Total Recoverable Nickel, Total Recoverable. [11 Miss. Admin. Code Pt. 6, R. l.L4.A(4)]

• Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination System Entergy Mississippi Inc, Grand Gulf Nuclear Station .

Facility Requirements Permit Number: MS0029521 Activity ID No.:PER20160001 Page40 of42 RPNTOOOOOOOOlO (MS0029521-014) Outfall 014 (Treated Effluent from Basin B which enters an Unnamed Tributary thence into Hamilton Lake.

• Contributing wastewater sources inclyde effluents from internal Outfall 007, standby service water leakage, intermittent circulating water basin overflows, and storm water runoff) - EXTERNAL:

__ Monitoring Requirements:

Condition No. Parameter Condition M-1 Samples taken in compliance with the effluent limitations and monitoring requirements of this permit shall be taken at the nearest accessible point following final treatment, but prior to entering or mixing with the receiving stream. [11 Miss. Admin.

Code Pt. 6, R. l.l.4.A(4)] .

Submittal/Action Requirements:

Condition No. Condition S-1 The Permittee shall submit analytical results on an annual Discharge Monitoring Report (DMR): Due annually by the 28th of January. [11 Miss. Admin. Code Pt. 6, R.

1.1.4.A.l 5(c )]

S-2 The Permittee shall submit analytical results on a quarterly Discharge Monitoring Report (DMR): Due quarterly, by the 28th of Jan, April, July, and Oct. [11 Miss.

Admin. Code Pt. 6, R. l.1.4.A.15(c)]

Permit to Discharge Wastewater in Accordance ~ith Nation:~l Pollutant Discharge Elimination System Entergy Mississippi Inc, Grand Gulf Nuclear Station Facility Requirements Permit Number: MS0029521 Activity ID No.:PER20160001 Page 41 of 42 RPNTOOOOOOOOlO (MS0029521-014) Outfall 014 (Treated Effluent from Basin B which enters an Unnamed Tributary thence into Hamilton Lake.

Contributing wastewater sources include effluents from internal Outfall 007, standby service water leakage, intermittent circulating water basin overflows, and storm water runoff) - EXTERNAL:

Narrative Requirements:

Condition No. Condition T-1 The parameter listed below shall be monitored once per month when discharging, utilizing 24-hour composite sampling, until 12 samples have been collected. Once the data is collected, the permittee shall submit a report summarizing the results of each sampling event. The reports shall be submitted to the MDEQ to the attention of the Environmental Permits Division (EPD) on the 28th day of the month following the completion of the effluent sampling. Based on the effluent monitoring results, the permit may be modified to reflect any additional or more stringent limitations and monitoring requirements.

Parameter Iron, Total Recoverable Copper, Total Recoverable Lead, Total Recoverable Nickel, Total Recoverable. [11 Miss. Admin. Code Pt. 6, R. l.l.4.A(4)]

Permit to Discharge Wastewater in Accordance with National Pollutant Discharge Elimination Syste*m Entergy Mississippi Inc, Grand GulfNuclear Station Facility Requirements Permit Number: MS0029521 Activity ID No.:PER20160001 Page 42 of42 RPNTOOOOOOOOll (MS0029521-016) Outfall 016 (Low volume waste discharge consisting of miscellaneous wastewaters from the Energy Services Center inclqsive of ECS water Softener back wash, HVAC cooling tower waste water, plant softener backwash, and storm water runoff) -

INTERNAL:

Limitation Requirements:

Condition No. Parameter Condition L-1 No chemical treatments containing chloride, zinc or chromium shall be added to any of the waters subject to discharge at this outfall (Outfall 016) without prior notification and permitting authority.approval in accordance with the conditions descril;>ed in S-10 on page 8 of this permit. [11 Miss. Admin. Code Pt. 6, R. 1.1.4.A(4)]

Monitoring Requirements:

Condition No. Parameter Condition M-1 Samples taken in compliance with the effluent limitations and monitoring requirements of this permit shall be talcen at the nearest accessible point following final treatment, but prior to entering for mixing with any other wastewaters. [11 Miss .

. Admin. Code Pt. 6, R. l.l.4.A(4)] -

M-2 Samples taken in compliance with the effluent limitations and monitoring requirements of this permit shall be taken at the most accessible point following confluence of all wastewaters permitted for discharge at this outfall (Outfall O16), but prior to entering Basin A. [11 Miss. Admin. Code Pt. 6, R. 1.l.4.A(4)]

• Submittal/Action Requirements:

Condition No. Condition S-1 The Permittee shall submit analytical results on an annual Discharge Monitoring Report (DMR) : Due annually by the 28th of January. [11 Miss. Admin. Code Pt. 6, R.

l.l.4.A.15(c)] .

GENERAL INFORMATION Entergy Mississippi Inc, Grand GulfNuclear Station 7003 Bald Hill Road Port Gibson, MS Claiborne County Alternate/Historic Identifiers Page A-1 or"A-3

GENERAL INFORMATION ID Alternate/Historic Name User Group Start Date End Date 2082 Entergy Operations, Inc. Pfficial Site Name 04/28/1981 2802100023 Entergy MS, Grand Gulf Nuclear Station k\ir-AIRS AFS 10/12/2000 MSD0006446 l 7 !Entergy Mississippi, Inc., Grand GulfNuclear Station !Hazardous Waste-EPA ID 10/12/2000 042000023 Entergy Mississippi, Inc., Grand Gulf Nuclear Station k\ir-Title V Operating 09/05/1997 OWOI/2002 042000023 Entergy Mississippi, Inc., Grand Gulf Nuclear Station

• k\ir-Construction 08/16/1999 042000018 Entergy Mississippi, Inc., Grand Gulf Nuclear Station k\ir-Construction 03/13/1984 03/01/1985 042000018 !Entergy Mississippi, Inc., Grand Gulf Nuclear Station l,\.ir-State Operating 04/28/1981 08/28/1981 MSR101071 Entergy Mississippi, Inc., Grand Gulf Nuclear Station OP-Construction 04/30/1998 10/28/1998 MSR000883 Entergy Mississippi, Inc., Grand Gulf Nuclear Station

• OP-Baseline 08/18/1993 07/13/1997 MS0029521 !Entergy Mississippi, Inc., Grand Gulf Nuclear Station Water - NPDES 09/19/1997 09/16/2002 MSR000883 Entergy Mississippi, Inc., Grand Gulf Nuclear Station OP-Baseline 10/31/2000 02/10/2006 MS0029521 Entergy Mississippi, Inc., Grand Gulf Nuclear Station ~ater - NPDES 07/24/2003 06/30/2008 042000023 Entergy Mississippi, Inc., Grand Gulf Nuclear Station k\ir-Synthetic Minor Operating 06/01/2004 05/31/2009 MSR000883 Entergy Mississippi, Inc., Grand Gulf Nuclear Station OP-Baseline 02/10/2006 12/01/2010 2082 Entergy Mississippi Inc, Grand Gulf Nuclear Station k\ir-Notification

• 04/07/2008 2082 001 Grand Gulf Nuclear, Middle South Energy (}ARD 04/21/1981 3rand GulfNuclear Station Temporary Rental Office Buildings for RFO-2082 Air-Notification 10/17/2008 16

~082 Grand Gulf portable building SIC 4911 ~ir-Notification 05/27/2009 M82 Grabd GulfNuclear Station Warehouse ~ir-Notification 07/19/2010 MSR000883. Entergy Mississippi, Inc., Grand Gulf Nuclear Station OP-Baseline 12/01/2010 09/28/2015 MSR105946 Entergy Mississippi Inc, Grand Gulf Nuclear Station OP-Construction 05/13/2011 12/31/2015 MS0029521 Entergy Mississippi Inc, Grand Gulf Nuclear Station ~ater - NPDES 09/02/2011 08/31/2016 042000023 Entergy Mississippi Inc, Grand Gulf Nuclear Station k\ir-Synthetic Minor Operating 01/06/2014 12/31/2018 MSR000883 Entergy Mississippi, Inc., Grand GulfNuclear Station OP-Baseline 12/30/2015 10/31/2020 2082 Grand Gulf Nuclear Station k\ir-N otification 05/08/2017 Branch !Branches Group - Air 07/18/2017 Branch Branches Group - Water 07/18/2017 Branch Branches Group - Stormwater-401 07/18/2017 Branches Group - Hazardous

!Branch 08/04/2017 rwaste Basin: Mississippi River Basin - direct dischargers to MS Page A-2 of A-3

GENERAL INFORMATION Location

Description:

PG- Plant Entrance (General). Data collected by Greg Miller on 11/16/2005. Elevation 219 feet. Bald Hill Road entrance is closed must enter plant frorri Grand Gulf Road.

Page A-3 of A-3