ML22020A416

Reporting Related to NPDES Permits and State Certifications

ML22020A416
Person / Time
Site:	Summer
Issue date:	01/20/2022
From:	Lippard G Dominion Energy South Carolina
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
22-019
Download: ML22020A416 (35)

Text

V.C. Summer Nuclear Station Bradham Blvd & Hwy 215, Jenkinsville, SC 29065 Mailing Address:

P.O. Box 88, Jenkinsville, SC 29065 Dominion Energy.com Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555 January 20, 2022 DOMINION ENERGY SOUTH CAROLINA. INC. (DESC)

VIRGIL C. SUMMER NUCLEAR STATION (VCSNS) UNIT 1

~

Dominion p

Energy Serial No.: 22-019 VCS-LIC/TS RO Docket No. 50-395 License No. NPF-12 REPORTING RELATED TO NPDES PERMITS AND STATE CERTIFICATIONS DESC hereby submits a copy of the NPDES Permit No. SCG646072 permit renewal package and environmental violations in accordance with VCSNS Operating License Appendix B Section 3.2, Reporting Related to the NPDES Permits and State Certifications. The violations were reported to the South Carolina Department of Health and Environmental Control via Discharge Monitoring Reports for a permit exceedance of the Total Suspended Solids Daily Maximum value in October of 2020 and missing three Manganese samples in December of 2020. DESC is also providing a more recent notice of violation for not performing Total Residual Chlorine analyses by a certified laboratory as required by South Carolina laboratory certification regulations.

The timeliness of this submittal has been entered into the VCSNS corrective action program (CR-21 -03586).

Should you have any questions, please call Mr. Michael Moore at (803) 345-4752.

Sincerely, George A. Lippard Site Vice President V.C. Summer Nuclear Station Enclosures Commitments contained in this letter: None cc:

G. J. Lindamood - Santee Cooper L. Dudes - NRC Region II G. E. Miller - NRC Project Mgr.

NRC Resident Inspector

VIRGIL C. SUMMER NUCLEAR STATION (VCSNS) Unit 1 DOCKET NO. 50-395 OPERA TING LICENSE NO. NPF-12 Enclosures Serial No.22-019 Enclosures Page 1 of 34 NPDES General Permit for Water Plant Discharges, General Permit #SCG646000, Coverage #SCG646072 Renewal Application Permit Number SCG646072 Discharge Monitoring Report DMR Period 10/1/2020 -12/31/2020 Permit Number SCG646072 Discharge Monitoring Report DMR Period 12/1/2020 -12/31/2020 Notice of Violation Al-0004852 Permit Number SCG646072 v2.1

Dominion Energy South Carolina, Inc.

400 Otarre Parkway, Cayce, SC 29033 Mailing Address:

220 Operation Way, MC-C221, Cayce SC 29033 HAND DELIVERED August 3, 2020 Ms. Brenda Green SCDHEC~Bureau of Water Domestic Wastewater Permitting Section 2600 Bull Street Columbia, South Carolina 29201

Subject:

Dominion Energy South Carolina, Inc. V.C. Summer Off-Site Water System, NPDES General Permit for Water Plant Dischargers, General Permit

1. SCG646000, Coverage #SCG646072 Renewal Application

Dear Ms. Green:

Dominion Energy South Carolina (DESC) is submitting the following information for the renewal of coverage of the SCDHEC General Permit for the subject facility as noted below:

SCDHEC Notice of Intent (Form 1813)

NOi Supplemental Information NOi DMR Data SCDHEC Location Supplement and USGS TOPO Map Process Flow Diagram(s) and Site Layout SCDHEC Sludge Disposal Supplement and Acceptance Letter Please note that this submittal reflects the application extension date granted by the Department on June 26, 2020. As requested, the emergency contact information of two individuals is listed in Part II of the NOi. Although not included on this form, the e-mail address and mobile number for these individuals is:

Tracey Stewart, (803) 707 4657, tracey.stewart@dominionnergy.com Raymond Chavez, (803) 315-7652, chavez.raymond@dominionenergy.com

Ms. Brenda Green, SCDHEC August 3, 2020 Page2 We have enclosed one original and one copy of the application. An electronic copy will to be submitted as well. If you have any questions or need additional information, feel free to contact me at (803) 608-3303 or Mark Ferguson at (803) 331-5298 or e-mail at mark.ferguson@dominionenergy.com.

Sincerely, Thomas Effing r Director, Environmental Services enclosures cc: Kayce Jarman, SCDHEC-BOW T. Stewart/G. Lippard/M. Moore, V.C. Summer R Marshall/C. Raymond, V.C. Summer K. Ellison, V.C. Summer R. Hasledon, V.C. Summer K. Roller, Dominion Energy M. Mosley/M. Ferguson/file

Submitted to:

SCDHEC General Permit #SCG64000 Permit Renewal Application for Water Treatment Plant Dischargers Coverage #SCG646072 V.C. Summer Off-Site Water Treatment Plant Dominion Energy South Carolina (DESC)

V.C. Summer Nuclear Station Jenkinsville, South Carolina 29065 i; Dominion

=--' Energy*

Submitted by:

Sourth Carolina Department of Health and Environmental Control Bureau of Water Dominion Energy South Carolina, Inc.

Southeast Energy Group (SEG) 220 Operation Way, MC-C221 2600 Bull Street Cayce, South Carolina 29033 Columbia, South Carolina 29201

Section SCDHECForm 1813 Attachment A

B C

D E

SCDHEC General Permit Permit Renewal ApP,lication V.C. Summer Off-Site Water Treatment System Dominion gnergy South Carolina, Inc.

Coverage Number SCG646072 Table of Contents Notice of Intent NOi supplemental NPDES Information NOi Discharge Monitoring Report Datc:i SCDHEC Location Supplement and USGS TOPO Map Process Flow Diagrams (Fig. 3-1 & 3-2),

OWS Water Treatment Plant Site Layout (Fig. 3-3)

SCDHECSludge Disposal Supplementand Acceptance Letter

Notice of Intent for SCDHEC General Permit for Water Treatment Plant Discharges SCDHEC Form 1813

Notice of Intent (NOO NPDES <3eneral Permit for Water Treatment Plant Discharges SCG64.6000 Sub,;issjon of this Notice of lolenlconsfilutes nollcs L~atthe partyldenlif.edln SecUcn!..lsf!llluesiing to.be authorized by an NPDES pennit!ssuedfori\\faterTreal'llflntP/ant disehargeslnScuthCan:,ITna ata locatliln(s) Identified below. Seooming a permltleeobllgates such a discharge lo co,:r,plywi~~aH te:ms and coniliUor.s oil~e.Jssued ~PDES C:;ene~I permit. A!.!. NECESSARY INFORMATION MUST SE INCLUDED. Seu fnstruetlons on pages 311nd 4, I. Facillty/OWner lnform;:1ti~n Name of Facility:

DESC-V.C. Summer Off~Slte Water Treatment Plant Facility Site Address: 400 Bradham Boulevard City:

Jenkinsville state: s.c.

County:

Fairfield Owner Name:

Pominion Energy South Catoiina, Inc, Owner Mailing Address:

P.O. Box 88, MC 846 Zip: 2906_5 ___ _

Phone: (

803 ) 345-4321 City:

Jenkinsville State: S,C.

ZIP:

29065 Operator Status: P II. Facility Contact Information Contact Name:

Tracey stewart/Chavez Raymond (Alt.)

Phone: C 803

) 93H5663/345-4649 Contact

Title:

Nuclear Licensing Engr JSupr., Chemistry (Alt.)

Mailing Address: P.O. Box 88,.MC 830 City:

Jenkinsvllle State:

S.C.

ZIP: 29065 Ill. Si~~ and Discharge lnfonn~tion A SIC or Activity Codes:. Primary:_4=9....

41....._ __ 2nd: 4911 B. Does the facility currently have Water Treatment Plant General Pennit coverage?

'1f'Yes, SCG 646072 No C. List any other NPDES or ND Pennit numbers for the facility: SCR000O0O

.SC0030856 ND D. List the type of discharge (see Item F below), the estimated iloW (in g~llons per day} associated with each discharge, the latitude and longitude (to the nearest 15 ssconds), and the name of the receiving water to which the discharge flows.

Dfacharge Type Flow Latitude Longitude Receiving Waters

{gpd)

Deg Min Sec Deg Mm S~c Residuals. Basin Supernatant &

Reverse Osmosis. Reject 648,000 34 17 55.65 81 17 54.49 Monticello Reservoir E. Oescnbe each discharge flow path from the point 1t exits the system to the point rt enters the receJVrng water (attach a separate sheet if rrtore space.is needed}. Indicate the type of discharge associated with each description.

WTl:' b~cl<wash ~asfe: Sellllng pond discharges F. ld;3ntlfywtJlctJ1 if any, of.the following are LJsed:

'2'.l Aluminum-based coagulants lron-basedCoagulants supemantant through gravjty pipe to Monllcello Reservoir. A proC?ssflow and site layout diagram is provided in Alla<;hment D, D Polymer-based Coagulants D Iron and/cir Manganese rem0Ve1I and/or sotte11ing [without the addition of chemical coagulants]

)on Exchange 1Zf ftaverse Osmosis 1if Activities associated with the operation and maintenance ofwatertr.eatmentfacllitJes including collection and distribution systems G. Lo~te the facility a11d each discharge on a U.S.'.Geologlcal Survey 71/2 IJ]inute quad sheet. An 81/2 x 11 copy c:lf' fr\\e portion of the map with the facility and each discharge identified should be submitted with this NOi. The discharge.on a USGS quad map is provided In A!lachmenf C.

H. Describe your sludge disposal method.

No sludge generated.

Lagoon or other fac;ll!ty with no routine sludge :disposal.

ii'Disposal at an approved faclllty, such as a landfill or wastewater treatment facility. Attach letterof approval rrom*the teceMng facility.

Disposal by land application. Indicate ND number, Constructlon Pennlt number, or other approval by the Department.

DHEC 1813 9/201.0 Pagel of4

I. For_ each discharge desaibed in D above where quantitative data exists, plea;;ie provide concentrations of the followlng parameter&.

Indicate whether the datJ Is based on actual sampUng results or, It estimated, the aource of the estimated value. Data muat be represenfatlve of the facility's current operation ar19 lncfude all parameters on yoor current permit Of any). The BV9rage dally valµe Is typ!caly based on an average of the last three (3) years of data. In the spaces provided (or on an attachment), Ustany other pollutants believed present and their concentratfons. If mora than one dlsd,arge Is ph1sent, make cpples of the table and provide data for ~ch discharge attached to the NOi.

See Attachment B for data.

Type of Dlsc;harge:

Parameter Maximum Dal!Y Avera,* Dally Nu!llberof Source of Estimate or Value Value Samples ActualData Flow-m3/day (MGD)

Total Suspended SoRds (TSS), mg/I Total Resldual Chlorine (TRC), mgn pH (give high and low In range), S.U.

I I

Total Aluminum, mg/I Total Iron, rng/1

\\

Total Ph_osphOnJS, mg/I Whole Effluent Toxicity (Acute Testing)

[Pass/Fall or I~ data, If avaffable]

Attach supplement fo~lon Excha~ge or Reverse Osmosis processes J. D~ the applicant own au properties necessary to allow for direct discharge of WB!ilewalers int!) the Waters of the State?

Yes No If NO, have all necessary easernehts b<<J!'ti obtained by the applicant for any conveyances of the discharge not on the property of the permlttee and which do not constitute Waters.of the South caronna?

K. Use the space below to bring to the Department's attention any additional informatlon you feet should be considered In the pennlt 4eclslon. Attach additional sheets If necessary.

See Attachment A for further Information regarding the NOi.

IV. Certification I certify under penalty of law that th~. doqJment and all attachments were prepared under my direction or supervision In eccordarice with e system designed to assure tttat qualified personnel gather and evaluate the lnfonnatlon submitted. Based on my Inquiry of the person or persbns who manage the system, ortl1ose pers:ons directly responsible forgathering the lnfo~atlon, the Information su!)mltted Is, to the best of my knowledge and belief, true, accurate, and cornpl~e. I arn aware that there are slgnlflcant penaltl~ for submlttlng false Information Including the posslbllliy of-fine and Imprisonment for knowing violations.

Print Name:

George Uppard Tille:

Site Vice President Signature: xijJ;.:/

Date:

7/,;_~/~6 DHEC 18139/2010 Page2 of4

INSTRU.CTIONS-Notice Of Intent (NOi) For Water Treatment Plant.

Discharges To Be Covered Under the NPDES Gen*eral Pennit SCG646000 Who Must File A Notice of-Intent (NOi).

Federal law at 40 CFR Part 122 prohibits point source discharnes to a waterbodles of the 1../.S. without.a National Pollutant Discharge Elimfnatfon Sys_tem (NPDES) permit. The owner/operator of a w.atertreatment facifity must subniit an.NOi to*_obl11in coverage underthe:NPDES General Permit for Water Treatl)lent Plants. If yo(! have questions about w!iether you heed a permit under the NPD_ES Program, or if you need Information contact S;C. DH_E*c a/ (803) 898-4300.

Where To File NOi, NOls must be sent to the following address:

SC Dep*artment of Health & Envfronmenlal Control Bureau of Water/NPDES Permit Admiriistratitm

• Notice of Intent/Water Treatment Plants 2600 Bull Street Columbi~. ~c 29201-1797 Completing the NOi You must type or print all informati.on. ir you have any questions. call S.C.

DHEC at (803) 1)98-4300, a_sk for the Domestic.Wastewater Permitting Sect.ion.

Revisloris to a prevjously submitted NOi If the.re are only changes in na.me, address, or facility con ta cl person, *only Sections I, II and N Qflhe NOi are required to be.completed: The entire NOi. should.be. completed for changes. in discharge(s) *or discharge characteristics.

Fees The annl!al NPDES.aaministralion fee of $100 must be s_ubmitled with,lhe.

NOi for coverage of a new faclllty. This fee is for all facifilies requesting coverage, _under the SCG!,4~QOO permit. Make check payable to S.C.

DHEC and aitach to NOi.

Section I: Facillty/Operatcir Information.

\\31l(e the legal name ~md p_hyslcal adcfress of the facillty to. be pe*rmilted, including ~jly, slate, zip code and county. If the facility lacks a street'.

address,.indlcale the-staJe or county Highwaynumber,lhe nearesttown. or city, or the q*uarter section, township, and range (to !he nearest quarter section) of the approxrmate center of the site,.

Give the legal narrie of the person, firm, public orgal')ization, o'rany'other enli!y that owns/operates the facility or site described in !his appllcation.

The name *or-the owner/operator may or may not l:ie the same name as the facility,* The owner/operator of the facility is the legal entity wt)ich controls the faclljly's operation, rather lhan !lie plant*or site mariager. Do not use a colloquial name. Enleflhe complete address and telephone:mirhberof

.the owner/operator.

Owner/Operator S.tatus: Enter (he appropriate letter to indicate the legal ownership status of the faci!ily.

F=Federal M=Pub!ic {other than federal orslale)

S=State p::pfivate l=lnduslrial Sectiori II: Facility Contact Information Enter the name, til(e and*comple\\(l a~_dress and phone number of !he person who Is familiar with the operation of.the*facillty anq with the facts reported in this NOi *and to Whom all pennltling correspondence should l:\\e sent.

• Section Ill: Site and Discharge lnformatlon.

A..

List, in descenaing order of signiticanc\\'), up lo four 4-diglt standard Industrial dassification (SIC) codes that best describe the p~incipal products or services provided at lhefa-ci!ity or site Identified in Section I. The SIC code for wate'r trealnienl facilities primarily engaged in distributing water for domestic, commercial, and industrial use is 4941.

• Dl-IEC 1813 9iiDIO B. Indicate whet~er the facility is currently covered ):Jy the Water Treatmeril Plant C,'eneral Permit and give the permit number, if applicable.

C, Usl any other NPDES or ND {land application) pennits issued for the facility, if applicable.

D. Lisi each discharge for which coverag_e.is sought. Actual Or estimated flow data should be lnciuded for each discharge. If coverage is sought' for more tha'n one discharge or the -same type; please 11ote thatlhe discharges are distinct. If more space Js needetj, attach a seJlarate sheet. Give the latitude and longitude (lo.the nearest 15 seconds) foreach discharge*and the name of the receiving waters. Name all waters lo Which discharge js made an_d Which -flQW into signiflca11t receiving*

waf!=rs, For example, ifthe dischargE;i 1s made to a dll.chwhlch flows info an unnamed tributary which in tum flows into a named river-, you should provide the riame*or'de*scripilon (if no nanie is a,vailablerofthe ditcti, !he tributary and the river *.

E. D.escrlbe each discharge -fiow p?th from the point It exits !he system to tlje point it* enle_rs. the receiving water -(attach a

-sepan~te sheet if mor~ liPace Is needed). lndh,ate the iype of discharge*assciciated with each description.

F. Identify the primary source for e~ch proposed outfall location:.

1, Filterbackwastiwaler, sedimentation basinwashdown.

and decant from Water treatment facilities {or other covere9_

.activities) using aluminum.based coagulation agents;

2. Filler backwash water, sedimentation basin washd own, and _decant from water treatment. facilities (or other ccivered activities} using iron based coagulalion agents.

• 3, Fnterbackwash waler, sedimentation basinwashdown, and decant from w:ater jreatment faciHlies (or allier covered activities) using !JOlyrner based coagulalion agents.

4. Filter backwash water, sedimenlalion basin washdown, and d~ca'r:1t from freatment qsing l!=c'hn6logies designed for iron andlot manganese removal and/or softening Without the addijion of chemical coagulants.

5. Filler backwa*sh water, sedimentation basin washdown,

.ind decant from treatment using technologies desig*ned for ion el(change.

6. Filter backwash Vtaler, sedimentation basin Washdown,

.and decant. from treatment using technologies designed fo'r

.reverse osmo~is.

7. Activities that involv<1 aluminum based coagqlalion agents,

• Iron based

• coagulatiol) agents, polymer based cciagulalicin agents,.'or other technologi!=S designed for fron and/or manganese removal and/or soften!ng Without,the addifion of chemical coagulants which ate associated wi\\h the operation and maintenance ofWatertnialment facilities incltidiilg collectiori and distribution systems.

G. ProVide an 81/2 x 11 copy of the applicable portion ofa US Geological.Survey 71/2-minute quad map localing !he facility and discharge poinl(s). :rhe quad sheet name must be provided with the map.

H. Describe your facl!ily=s slu~ge dispos,:\\L L Complete lhls section only if there is existing data qescribing the concentr~tion of pollul<!nls in the djscharge(s). Provide data from the previous three (3) years prior to the*permitappli_cation.

J. The permiltee must obtain all necessary easements before applying for this permit.

K. Pn>vide any otherretevanl information you wish to be considered in the perrnitpecislon.

Page 3 of4

Supplemental Information *needed* for Ion Exchange or Reverse Osmosis.

For each discharge described in !).above where,quan\\ilative data exists, please provide cqnceritratlons of ihe followlng parameters. lndic;'lte whelherlhe.dafa is based*on actt1al sampling results or, ifesllmated, the source of the estimated value. Data m.ust be representa_llve of *the facilities_ current.operation and include all parameters on yo_ur cl!rrent permlt (lf-any), The average.daily valu*e is typically bas~d. on im average of the last.three (3) years of data. List any other pollutants believed *present and t!leir concenlrf!tions. If more than one discharge is present, provide cJi!la for eacti discharge attached*to the NOi.

Total Arsenic Total Barium Total Cadmium Total Copper Total Mercury Tot11I Selenium Total Zinc Temperature (effluent)

Salinity (effluent)

Section IV: Certification Please print the n<!rrie and title of the authorized person and sign an9 date in.accordance _\\-1/ilh the followll)g:

Federal statutes provide for severe penalties for subm.itting false.

information on this applicatio*n. Federal regulations require this application to be signed as follows:

For a COf1)oration: by a responsible corporate. officer,. which means:

(i) president, secretary, treasurer, or vice-president of the. corporation in charge of a principal business:ful)ction, or any other person who performs

• similar policy or decision making *functions, or {ii) the m;mager,of one or more manufacturing, production, cir operatirig facilitieiremploying more than 250 persons or having gross.annual safes or expenditures exceeding

$25 million (in second-quarter 1980), if aUthcirilyto sign documents has

.been assigned or delegated to the.managetin accordanceviith corporate procedures:

for a partnership or sole proprietorship: by a general partner or the proprietor; or For a mun;cipa!iiy, Slate, Federal, or*other_public facility: by either a principal e_xeculive officer or ranking elected official.

DHEC 18i3 9/2010 Puge4 of4

Attachment A Notice of Intent Supplement Information

NPDES Attachrnent A Information to Supplement the Notice of 1.ntent (NOi) Renewal of SCDHEC General Permit SCG646000 for the V.C. Summer Off site Water System Facility Orientation/Background The Dominion Energy South Carolina (DESC) V.C. Summer Offsite Water System (OWS} Water Treatment Plant is loca.ted in Jenkinsvilie, South Carolina. This system produces both potable water for use at theV;C. Summer Nuclear Station as well as filter process water for Unit#1.

Originaliy, this system was constructed to support the proposed Unit 2 & 3 nuclear project which the construction was terminated. The facility is termed offsite as it is not Within th.e Unit

1. 1 exclusion area but is entirely within the v.c, Summer property boundary. Th.is facility is permitted underthe SCDHEC General Permit SCG646000 for Wat.er Treatment Plant Dischargers with coverage numqer SCG640672. The facility is design~d for a treatment capacity of 0.25 MGD of potable water. In addition to the potablewc!tertreatment system (PWTS), a parallel treatment train of filtered water process water {FWTS) is ;,ivailable With a maximu.m capacity of 4.0~ MGD. The PWTS and FWTS both utilize the same raw water intake and raw water pumping system, as well as.the w~ste stream disposal systems. Bulk chemical ston;ige tanks are shared as much as practical. All other treatment, chemical addition, chemical deaning and treated water storage facilities are separated. The filtered process water system is notfor potable wc!ter use and thus not specifically regulated under the General Permit.

The OWS uses the Monticello Reservoir as a raw water source that i~ located in Jenkinsville in Fairfield County adjacent to the Broad River. The Monticello Reservoir was constructed in 1978 as a Pumped Storage Facility (Fairfield Pumped Storage} to provide cooling water for the Nuclear Power Facility. The Monticello Reservoir is part of the Santee River Watershe.d and Broad River s.ub"'basin. As part of the OWS, the decanted water from the OWS solids retention basin and the RO reject stream will be returned to the Monticello ReservoJr. No other discharges directly enter into the Monticello Reservoir.

The OWS is manned by power plant operators whenever potable water is being produced while the V.C. Summer Station is manned 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> a day, 7 days a week.

Part Ill ~.Site and Discharge Information A topographic map of the V.C. Summer Station with a one-mile radius a.bove the station boundaries and tne SCDHEC location Supplement is included.with this ;:ipplication in AttachmentC. The map shows the OWS plant intake, waterboqy, OWS outfall, and hazardous waste storage as well. The V.C. summer Station also has no underground injection wells. A site process layout drawing is provided in Attachment D.

The l:PA Facility Response Service (FRS) Number for the V.C. Su mm.er Facility is 110070733979.

The primary Standard Industrial Classification (SI.C) Code for the V.C.. Summer OWS is4941 Water Supply while the main.SIC Code for the V.C. Sum.mer Station is 4911 Electric Services.

1

The V.C. Summer Station North America Industrial Classification Sy$tem (NAICS) Code is 221113, Nuclear Electric Power Generation.

The V.C Summer Station occasionally generates hazardo1.,1s w~ste under EPA ID No.

SCD069311579 and is classified as a large quantity generator {SQG}. Under40 CFR 262, V.C.

Summer is not a Treatment, Storage;or Disposal Facility (TSDF). The v;c. Summer Station is permitted µnder NPDES No. SC0030~56 for the main wastewater discharges and SCDHEC Industrial Stormwater Permit No. SCRl0000O {Coverage #SCR005713}.

Treatment Process Overview The OWS uses.ultrafiltration (UF} membrane_s followed by reverse osmosis (RO) membranes, as noted in process flow diagram in Attachment b. The includes pre-treatment by coagulation (aluminum sulfate), flocculation, and pre-screening through self-cleaning filters; followed by ultra-filtration and reverse osmosis, then finally remilieralization (calcium chloride addition),

The process water handling *an~ disposal _is thru gravity settling i.n a retention basin wi~h the supernatant discharged and accumulated solids in the basin sent off-site for disposal as necessc1ry.

Major components common to the PWTS and FWTS Include:

o Raw water intake, raw wc1terpurnp station.} raw water transmission. Raw water flow measurement and chemical addition, process drain pu.mp station, process wastewater handling and disposal, sanitary wastewater handling and disposal, instrumentation and control systems, electrical systems, and operational support facilities.

The potable water treatment components incltJde:

o Flocculation system, ultrafiltration membrane system, reverse osmosis membrane system, reverse osmosis permeate Water chemical-addition, finished.water disinfection (Sodium hypochlorite contact tanks, potable water Storage Tanks, Distribution Pump house and Transmission main, and chemical feed.systems. The chemicals used in the process are further discussed.

The sanitary wastewater from toilets and lavatories are segregated from process drains and discharge to an on... site septic :System.

The process water handling and disposal:

The process drain pump stc1tion will transfer residuals"'containingflows to the dual bay solids retention basin. In the retention basin, solids will be removed by gravity settling.

S"upernataht from each bay will decanted and discharged to the Monticello Reservoir, Solids will be collected in the basin until a basin bay betomes approx. 2/3 full of solids which* will be diverted to the second bay. The first bay solidswill be dewatered, then removed and hauled off-si~e for disposal. An approval letter from an off-site landfill is noted in Attachment E.

chemical Additions The following chemicals may be used as.noted:

fswg:~,H~mr *.

Aluminum Sulfate

{Alum)

Sodium Hypochlorite Sodium Bisulfite Sodium Bicarbonate Anti-sealant Calcium chloride Hydrochloric acid Sodium Hydroxide (Caustic)

Phosphate-based inhibitor Primary coagulant.

Fim1I disinfectant and membrane cleaning.

For the RO feed use to dechlorinate solution for the l.JF units to avoid accidental damage to the RO membra*nes.

For rem.ineralization provides the alkalinity and help to produce a stable non-corrosive water.

This is feed upstream of the RO units to avoid precipitation of salts over the. RO membranes.

Added for remineraiization to produce a stable non-corrosive finished water.

Added for flexibility to adjust pH down after re mineralization, This is fed for pH adjustment.

May be used if required for corrosion control in the potable water distribution system.. This is not used in the treatment process.

6~000 gal. tank, 25 gal.

tank 6,000 gal. tank, 25 gal.

tank 250 gal. tote 50 lb; bags 55 gal.

2 x 250 gal. totes 100 gal. tote 6,000 gal. tank 55 gal. tank Applicable outfalls that have been reported on Discharge Monitoring Reports are li$ted below:

OSA 06A 07A OBA n~O:es".crW:ttontil\\itl3/4lffel

~'\\llvion)JE1!c11' "J°'.,_,~,*,

Reverse Osmosis and discharging to Flow1 TSS, Mn, P*, pH Freshwaters (FW)

Toxicity testing for FW discharges Acute WET Reverse Osmosis discharging to FW As, Ba, Cd, Cu, Hg, Se, ZN, Temperature, Salinity TRC limits for FW discharges TRC

• Monitored if phosphate chemicals are used in the. treatment process.

3

NOi Part Ill, Representative Monitoring Data Samples used to generate the Discharge Monito*ring Report (DMR) data that has been summarized in the table located in Attachment B. Sample analyses were performed in accordance with mettiods promulgated in 40 CFR Part 136.

DMR Parameters: For parameters that are ro'utiheiy monitored under Part I of the current permit ini::ludes existjlig dischcJrge monitoring data for the period from September 2017 to March 2020 as beln.g representative of current conditions. The previous data was not used as the flow values would not be representative of current flow conditions due to operational conditions at that time period. The averages reported are based on values as reported on the DMR.

Non-:DMR Parameters; *oata for aluminum, iron, and phosphorus were based on engineering estimates from the manufacturer reject rates.

A flow process and site layout diagram is provided in Attachment D.

FACILITY PLANS Various facility plans have been developed that could be applicable for this facility include:

Hazardous waste if generated on site will be managed in accordance with local, state, and federal requirements. At the time of the. application, the facility holds a large quantity generator status (#SCD06~311579) and has prepared a Hazardous Waste Contingency Plan (HWC). The HWCPlan and procedures were developed in accordance with the requirements Part 265 of 40 CFR mandated by Resource Conservation Recovery Act (RCRA) and the South Carolina Hazardous Waste Management Regulations, R.61-79.270.14(b){7) and R.61-79.265 Subpart D. This HWC Pran establishes documented procedures which will be immediately implemented if a threat to human health and/or the environment results from any unplanned release of hazardous waste or any type of emergency situation involving hazardous materials or hazardous waste (HM/HW). This plan identifies the measures that will be used to minimize any threat resulting from si.1.ch

.a situation. The facility is designed, equipped and operated to minimize accidents and prevent the occurrence of emergency situations and potential releases to the environment.

o lndwstrial stormwater disc:hc1rges for the V.C. Summer Station are authorized under the SCDHEC Ston:nw,ater lndl,Js_trial Ge_neral Permit #SCROOOOOO under coverage #SCR005713.

This *con~ains the.best management practices to minimize pollutants from industrial stormwc1ter runoff.

4

Pursuant to hazardous and toxic substances, the facility maintain~ a Best Management Practices (BMP) Plan to identify/control the dischc,1rge of hazardous and toxic substances per 40 CFR 117, Tabies II and Ill of Appendix D to 40 CFR Part 122, This also includes oil/petroleum substances as well.

5

Attachment B NOi Discharge Mohitoring Data

Type of Discharae: 05A, 06A, 07 A, OBA P"rameter Maximum Daily Average Daily Numbetof Source of Value Value Samples Estimate or Actual Data Flow-ms/day (MGD) 0.648 0.648 28 DMR; 05A2 Total Suspended Solids 21.6

<5.65 10 DMR, 05A2 (TSS), iTIQ/1 Total Residual Chlorine 0

0 28 DMR, 08A 1 (TRC}, mo/I pH (Give high and low in 6~38 8.02 6.38 8.02 13 DMR, 05A2 range), S.U.

Total Aluminum; mg/I 0.67 0.31 NIA Est-MFR Reject Rates Total lron1 mg/I 1.02 0.64 NIA Est.- MFR Reject Rates Total Phosphorus1 mg/[

2.3 1:63 2

DMR, 05A3 Whole Effluent Toxicity Pass Pass 3

DMR, 06A 1 (Acute Testing) [Pass/Fail or IC25 data, if availablel Attach supplement for Ion Exchange or Reverse Osmosis processes Total Manqanese; mg/!

2.06

<0.13 28 DMR.05A 1 Salinitv, PPTh 0.7 0.18 9

DMR, 07A 1 Total Arsenic, mq/l

<0.05

<0.04 9

DMR, 07A 1 Total Barium, mi:i/1 0.044 0.027 9

DMR, 07A 1 Total Cadmium, mq/1

<0,005

<0.003

• g DMR, 07A 1 Total Coooer, mg/I

<0.005

<0.004 9

DMR. 07A.1 Total Zinc, mg/I

<0.020

<0.006 9

DMR, 07A 1 Total Selenium, mall

<0.050

.<0.039 9

DMR, 07A 1 Total Mercuni, mi:i/1 0.000001 0.000001 2

DMR, 07A2 Temperature, °F 88.3 70.46 28 DMR, 07A3

Attachment C SCDHEC location Supplement and USGS Quad TOPO Map

SOUTH CAROLINA DEPARTMENT OF HEALTH AND ENVIRON.M,ENTAL CONTROL BUREAU OF' WATER LOCATION SuPPLEMENT FOR ND AND NPDES PERMIT APPLICATIONS

FACILITY:

DESC-V.C. Summer OWS Water Plant DATE: 6/15/2020 ITEM I:

ITEM2:

ITEM3:

Please give a short description of the plant location, if the address is not a specific lei.cation.

Example: Plant is located at the interchange of Interstate 26 and U :S. Highway #1.

The DESC Off-Site Water Treatment Plant is located off S.C. Highway 21 in Jenkinsville, S.C. The plant address is.400 Bradham Blvd. ih Jenkinsville.

Please give a description of the location of the discharge poU1t into thereceiving s.tream using some landmark as a reference point, i.e., bridge, stream, toad junction, the plant itself; etc. Give the direction and the distance in feet from the reference point Example: Discharge #001 is into Johnny Creek apptoxim:ately 300 feet directly behind the plant. Discharge #002 is into Doris Creek 150 feet downstream from U.S. Highway #30 briclge.

Discharge #001 is into* the Monticello Reservoir approximately 600 feet north (behind) of the water treatment plant. Follow the access road towards the intake structure and make the first left onto the graver road. The structure is noted by a concrete effluent box with a weir that discharges directly to the Monticello Reservoir. The monitoring location is noted on the site layout map (Fig. 3-3).

Please locate the discharge on a U.S. Geological Survey7 1/2 miJ;mte quad sheet (or a 15 minute quad ifa 7 1/2 quad is not avaih1ble for the area). The entire quad sheet need not be submitted. An 81/2 by 11 inch photocopy of the applicable portion ofth~ map fa sufficient. The quad sheet name must be provided on the copy submitted to the Department. USGS Maps are available.at the SC Dept. Of Natural Resources/Map Divisfon, 2221 Devine Street, Suite 222, Columbia, SC 29205.

Phone nutnhei is 734-9108.

RETURN TO:.

SCDHEC Bureau of Water NP DES Administration 2600 Bull Street Columbia, SC 29201

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Attachment D Process Flow Diagrams and Site Layout

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ADVANCING WATER JACOBS' OWS WATER mEATl"IENT PLANT VC SUMMER UNITS 2 &3 PROCESS FLOW DIAGRAM POTABLE WATER SYSTEM

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Attachment E Sludge Disposal Supplement and Acceptance Letter

Snuth C'.:irnlilm lkp_anmc:µ1 nfHcalth and Eli'lirotlmcntal Control BUREAU OF WATER SLUDGE DISPOSAL SUPPLl{MENT FOR NPDES AND ND PERMIT APPLICATIONS Fac:ility Name:. __

D_E.,...s_c_-v_.c_._s_u_m_m_e_r_O_ff._-S_i_te_W-'--. _a_te_r_T_re_a_tm_en_t_P_Ja_n_t ___ _

P.ermitNumber: 800 SCG646072 (leave*biank for a new facility) or NDOO. ___

Please check "your proposed or current sludge disposal procedure:

I.

Existing Facilities:

Lagoon or other facility with no routine sludge disposal. Please attach a letter that addresses the approximate schedule for sludge removal and address the anticipated. disposal method "(note thatihe proposed sludge disposai method must be approved by the Department prior to initiation).

Sludge disposal at ~other wastewater treatment facility. Attached _is a rec~nf letter of acceptance dated_-----'---,---*** This letter must include the NPDES or ND number of tl;,,e tr;::a,tment facility accepting fhe sludge for dispoi;;al. Ifno previous SCDHEC approvaUas been granted. on the disposal method, then please include a detailed report on the existing sludge disposal m~thod. See the attached requirements for Sludge Disposal Report.A. If a previous SCDHEC approval has been granted, tl\\en include a recent analysis that shows the non-hazardous nature of the sludge or a signed.statement that the sludge characteristics have not changes since, the Jast analysis.

_K Sludge disposal at a }atidfiU. If the land.fill is SW Ali> (special waste) approved, an rec1,mt acceptance letter from the landfi.Il.fa acceptable. If the landfill is not SW AIP *approvedi attacb,ed is SCDHEC Solid and Hazardous Waste*approval dated

• -----*------. orotherSCDHECapproval dated __======--* If no previous approval has been granted on tlie disposal method, then please lilclude a detailed report; on the existing sludge disposal m,ethod. S~e the attl:\\ched requirements for Sludge Disposal R~ort B.

Sludge disposal by Beneficial Use of Sludge. Attached is SCDHEGapprovaI letter or program approval dated-------'* Ifno previot!S approval has b~n granted on the disposal method, then, please mc:Iude a detailed report on the existing sludge disposal method. See the attached requirements for.SIµdge Disposal ReportC.

II.

Proposed Facilities:

Lagoon or other facility '}Tith no routine sludge disposal. Please attach a letter that addresses the approxiinate schedule for sltidge reJ;1ioval and adqress the anticipated disposal method (note tha~ the proposed sludge disposal method must be approved by-the. Department J?l'IOr to Jllitiation).*

_. _ Sludge disposal at anotherwast.ewater treatment facility.- Please m~lude a detailedxeporl on the proposed sludge disposal method, See the attached requirements for Siudge Disppsal ReportA Sludge disposal at a landfill. Please include a detailed report on the proposed sludge disposal method. See the attached requiremen1s for Sltidge Disposal ;Report B.

Sludge disposal by Beneficial 'use. Please include a detailed report on the proposed sludge dispos1;1l µiethod.

See the attacl;led requirements for Sludge Disposal Report C.

Sen4 this form an~ th~ apprQpriate disposal report (if applicable),vith :your NPDES or ND permit appµcatjou.

ALSO SEE ATTACHED INSTT{UC:TIONS July!, 1998

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WASTE MANAGEMENT Ms. Tracey Stewart Dominion Energy V.C. Summer Plant Jenkinsville, SC June 16, 2020 RE: Acceptance of Water Treatment Process Waste

Dear Ms. Stewart:

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Richland Landfill, Inc. is a permitted Subtitle D landfill located in Elgin, SC. As such, the facility is prepared to accept the referenced waste stream. All special waste disposed at Richland Landfill is subject to profiling and may require analytical data submission prior to acceptance. Sludges, filter cake, and filter media are subject to meeting solids acceptance criteria and unconfined compression strength requirements.

Richland County Landfill can accept the estimated 2450 tons per year of the waste generated by the VC Summer Water Treatment Plant. This acceptance is contingent on approval of the waste and agreement of both parties as to cost and charges to be determined at a later date.

If additional information is required, please feel free to contact me at (843) 409-54 72 or at thenry5@wm.com.

Sincerely, Richland Landfill Tim Henry Sr. Industrial Account Manager

DISCHARGE MONITORING REPORT {DMR)

Faci lity Name : DOMINION ENERGY SC INC VC SUMMER NUCLEAR STATION OFF-SITE WATER SYSTEM Permi t Number : SCG646072 v2.1 Permittee Name : DOMINION ENERGY SOUTH CAROLINA INC DMR Period: 10/1/2020 -

12/31/2020 Limit Set: 07Al QUANTITY OR LOADING QUALITY OR CONCENTRATION PARAMETER AVERAGE MAXIMUM UNITS MINIMUM AVERAGE MAXIMUM SALINITY (PARTS PER SAMPLE THOUSAND)

(00480) 0.2 0.2 MEASUREMENT Effluent Gross (1)

PERMIT Lab ID: 23104 REQUIREMENT Monthly Average Daily Maximum Total Arsenic (01002 )

SAMPLE Effluent Gross (1 )

0 0

MEASUREMENT Lab ID: 23105 PERMIT REQUIREMENT Monthly Average Daily Maximum Total Barium (01007)

SAMPLE Effluent Gross (1) 0. 02 0.02 MEASUREMENT Lab ID: 23105 PERMIT REQUIREMENT Monthly Average Daily Maximum rrotal Cadmium (01027 )

SAMPLE Effluent Gross (1 )

0 0

MEASUREMENT Lab ID : 23105 PERMIT REQUIREMENT Monthly Average Daily Maximum Total Copper (01042)

SAMPLE Effluent Gross ( 1) 0 0

MEASUREMENT Lab ID : 23105 PERMIT REQUIREMENT Monthly Average Daily Maximum NAME/ TITLE PRINCIPAL EXECUTIVE OFFICER I Certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage t he 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 SIGNATURE OF PRINCIPAL EXECUTIVE AREA fTYPED OR PRINTED penalties for submitting false information, including the possibility of fine and loFFICER OR AUTHORIZED AGENT CODE imprisonment for knowing violations.

Permit Number: SCG646072 v2.1 Generated : 1/28/2021 3:54 PM No Discharge :

NO. FREQUENCY SAMPLE EX.

OF TYPE UNITS ANALYSIS 0

Quarterly Grab PPth Quarterly Grab 0

Composit Quarterly e

mg/L Composit Quarterly e

0 Composit Quarterly e

mg/L Composit Quarterly e

0 Quarterly Composit e

mg/L Composit Quarterly e

0 Quarterly Composit e

mg/L Composit Quarterly e

TELEPHONE DATE NUMBER YEAR MO DAY Page 1 of 2

DISCHARGE MONITORING REPORT {DMR)

Facility Name : DOMINION ENERGY SC INC VC SUMMER NUCLEAR STATION OFF-SITE WATER SYSTEM Permittee Name : DOMINION ENERGY SOUTH CAROLINA INC QUANTITY OR LOADING PARAMETER AVERAGE MAXIMUM Total Zinc (01092)

Effluent Gross (1)

SAMPLE MEASUREMENT Lab ID: 23105 PERMIT REQUIREMENT Total Selenium (01147)

SAMPLE Effluent Gross (1)

MEASUREMENT Lab ID: 23105 PERMIT REQUIREMENT Permit Number : SCG646072 v2.1 DMR Period : 10/1/2020 -

12/31/2020 QUALITY OR CONCENTRATION UNITS MINIMUM AVERAGE MAXIMUM 0

0 Monthly Average Daily Maximum 0

0 Monthly Average Daily Maximum NO. FREQUENCY SAMPLE EX.

OF TYPE UNITS ANALYSIS 0

Composit Quarterly e

mg/L Composit Quarterly e

0 Quarterly Composit e

mg/L Composit Quar terly e

DMR Instructions : OUTFALL 07A 1-ION EXCHANGE AND REVERSE OSMOSIS DISCHARGING TO CLASS FW, FW sp WITH SITE-SPECIFIC STANDARDS, SA, SA sp, SB, SB sp, or SFH waters.

DMR Comments: Arsenic Method EPA 200.8, PQL 0.005 mg/L, number of times results below PQL = one Cadmium Method,EPA200.8, PQL 0.0001 mg/L, number of times results below PQL=one Copper Method EPA 200. 7, PQL 0.005 mg/L, number of times results below PQL = one Zinc Method EPA 200. 7, PQL 0.01 mg/L, number of times results below PQL = one Selenium Method EPA 200. 8, PQL 0. 005 mg/L, number of times results below PQL = one Limit Set: 05A2 QUANTITY OR LOADING QUALITY OR CONCENTRATION PARAMETER AVERAGE MAXIMUM UNITS MINIMUM AVERAGE MAXIMUM rPH (00400)

SAMPLE I

I I

I Effluent Gross (1) 7.68 8.21 MEASUREMENT NAME/ TITLE PRINCIPAL EXECUTIVE OFFICER I Certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and islGNATURE OF PRINCIPAL EXECUTIVE belief, true, accurate, and complete. I am aware that there are significant

[TYPED OR PRINTED penalties for submitting false information, including the possibility of fine and loFFICER OR AUTHORIZED AGENT imprisonment for knowing violations.

Permit Number: SCG646072 v2. l Generated : 1/28/2021 3:54 PM No Discharge:

NO. FREQUENCY SAMPLE EX.

OF TYPE UNITS ANALYSIS I

0 Four per Grab SU Quarter TELEPHONE DATE AREA I NUMBER YEAR MO DAY CODE Page 2 of 2

DISCHARGE MONITORING REPORT (DMR}

Facility Name: DOMINION ENERGY SC INC VC SUMMER NUCLEAR STATION OFF-SITE WATER SYSTEM Permittee Name: DOMINION ENERGY SOUTH CAROLINA INC QUANTITY OR LOADING PARAMETER AVERAGE MAXIMUM Lab ID: 20001 PERMIT REQUIREMENT Total Suspended Solids (00530)

SAMPLE MEASUREMENT Effluent Gross (1 )

Lab ID : 40572 PERMIT REQUIREMENT UNITS Permit Number: SCG646072 v2. l DMR Period: 10/1/2020 -

12/31/2020 QUALITY OR CONCENTRATION MINIMUM AVERAGE MAXIMUM 6.0 8.5 Minimum Maximum 24.7 92.7 30 60 Monthly Average Daily Maximum NO. FREQUENCY SAMPLE EX.

OF TYPE UNITS ANALYSIS Quarterly Grab 1

Four per Grab Quarter mg/L Quarterly Grab DMR Instructions: OUTFALL 05A 2-REVERSE OSMOSIS DISCHARGING TO FRESHWATERS (FW) ; TREATED FILTER BACKWASH WATER, SEDIMENTATION WASH DOWN WATER AND DECANT WATER.

DMR Comments: Three TSS samples were analyzed by Lab ID 20001 in December.

The TSS Daily Maximum has been entered into VC Summer's corrective action program.

DMR Value Comments :

Total Suspended Solids, Effluent Gross (1), Limit: 60 Daily Maximum, Reported Value: 92.7, Comment: Permit exceedance is due to the use of aerators installed at the settling basins to help maintain pH.

NAME/ TITLE PRINCIPAL EXECUTIVE OFFICER I Certify under penalty of law that this document and all attachments were TELEPHONE DATE prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and

!SIGNATURE OF PRINCIPAL EXECUTIVE belief, true, accurate, and complete. I am aware that there are significant AREA I NUMBER YEAR MO DAY

!TYPED OR PRINTED penalties for submitting false information, including the possibility of fine and

!OFFICER OR AUTHORIZED AGENT CODE imprisonment for knowing violations.

Permit Number : SCG646072 v2. l Generated : 1/28/2021 3 : 54 PM Page 3 of 2

DISCHARGE MONITORING REPORT (DMR)

Facility Name : DOMINION ENERGY SC INC VC SUMMER NUCLEAR STATION OFF-SITE WATER SYSTEM Permittee Name: DOMINION ENERGY SOUTH CAROLINA INC Limit Set: 05Al QUANTITY OR LOADING PARAMETER AVERAGE MAXIMUM Tot al Manganese SAMPLE (01055)

MEASUREMENT Effluent Gross (1)

PERMIT Lab ID :

REQU I REMENT Flow (50050)

Effluent Gross (1)

SAMPLE 0. 648 0. 648 MEASUREMENT Lab ID: 20001 PERMIT REQU IREMENT Monthly Daily Maximum Average Permit Number: SCG646072 v2. 1 DMR Period : 12/1/2020 -

12/31/2020 QUALITY OR CONCENTRATION UNITS MINIMUM AVERAGE MAXIMUM

• E

• E Monthly Average Daily Maximum MGD No Discharge:

NO. FREQUENCY SAMPLE EX.

OF TYPE UNITS ANALYSIS 2

Monthly Grab mg/L Monthly Grab 0

INSTANTA Three per NEOUS Month IN INSTANTA NEOUS Weekly IN DMR Instructions : OUTFALL 05A 1-REVERSE OSMOSIS DISCHARGING TO FRESHWATERS (FW); TREATED FILTER BACKWASH WATER, SEDIMENTATION WASH DOWN WATER AND DECANT WATER.

DMR Comments : A manganese sample was not obtained for analysis for the month of December.

The reporting omission will be added to the station's corrective action program.

DMR Value Comments:

Total Manganese, Effluent Gross (1), Limit: ***** Monthly Average, Reported Value: *E, Comment : A manganese sample was not obtained for analysis during the month of December.

Total Manganese, Effluent Gtos s (1), Limit: ***** Daily Maximum, Reported Va l ue : *E, Comment: A manganese sample was not obtained for analysis for the month of December.

Limit Set: 08Al No Discharge:

NAME/ TITLE PRINCIPAL EXECUTIVE OFFICER I Certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system TELEPHONE DATE 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 lslGNATURE OF PRINCIPAL EXECUTIVE belief, true, accurate, and complete. I am aware that there are significant AREA NUMBER YEAR MO DAY

[TYPED OR PRINTED penalties for submitting false information, including the possibility of fine and loFFICER OR AUTHORIZED AGENT CODE imprisonment for knowing violations.

Permit Number: SCG646072 v2. l Generated: 1/28/2021 4 : 02 PM Page 1 of 1

DISCHARGE MONITORING REPORT (DMR)

Facility Name: DOMINION ENERGY SC INC VC SUMMER NUCLEAR STATION OFF-SITE WATER SYSTEM Permittee Name:. DOMINION ENERGY SOUTH CAROLINA INC QUANTITY OR LOADING PARAMETER AVERAGE MAXIMUM Total Residual Chlorine (50060)

SAMPLE MEASUREMENT Effluent Gross (1)

Lab ID: 20001 PERMIT REQUIREMENT Permit Number : SCG646072 v2.l DMR Period: 12/1/2020 -

12/31/2020 QUALITY OR CONCENTRATION UNITS MINIMUM AVERAGE MAXIMUM 0

0 0. 011 0.019 Monthly Average Daily Maximum NO. FREQUENCY SAMPLE EX.

OF TYPE UNITS ANALYSIS 0

Three per Grab Month mg/L Monthly Grab DMR Instructions : OUTFALL OBA 1-TOTAL RESIDUAL CHLORIINE (TRC) LIMITS FOR ALL WATER CLASSIFICATIONS (FW, FW sp, SA, SB, SA sp, SB sp, or SFH).

DMR Comments: Total Residual Chlorine (TRC)

SM 4500- CL-G- 2011, PQL 0. 05 mg/L, times reported as zero one.

Limit Set: 07A3 No Discharge:

QUANTITY OR LOADING QUALITY OR CONCENTRATION NO. FREQUENCY SAMPLE PARAMETER EX.

OF TYPE AVERAGE MAXIMUM UNITS MINIMUM AVERAGE MAXIMUM UNITS ANALYSIS TEMPERATURE DIFFERENCE 0

Three per Grab SAMPLE 54.4 59.9 Month (FAHRENHEIT)

(00018)

MEASUREMENT Effluent Gross (1) deg F Lab ID: 20001 PERMIT Grab REQUIREMENT Monthly Average Daily Maximum Monthly DMR Instructions : OUTFALL 07A 3-ION EXCHANGE AND REVERSE OSMOSIS DISCHARGING TO CLASS FW,

FW sp WITH SITE-SPECIFIC STANDARDS, SA, SA sp, SB, SB sp, or SFH WATERS.

DMR Comments: (none)

NAME/ TITLE PRINCIPAL EXECUTIVE OFFICER I Certify under penalty of law that this document and all attachments were TELEPHONE DATE prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and lslGNATURE OF PRINCIPAL EXECUTNE belief, true, accurate, and complete. I am aware that there are significant AREA I NUMBER YEAR MO DAY TYPED OR PRINTED penalties for submitting false information, including the possibility of fine and loFFICER OR AUTHORIZED AGENT CODE imprisonment for knowing violations.

Permit Number : SCG646072 v2.l Generated: 1/28/2021 4:02 PM Page 2 of 1

Healthy People. Healthy Communities.

CERTIFIED MAIL 9214 8969 0099 9790 1420 6271 88 November 18, 2021 DOMINJON ENERGY SOUTH CAROLINA INC Attn: GEORGE A LIPPARD PO BOX 88 JENKINSVILLE, SC 29065 Re:

Notice of Violation AI-0004852 Permit# SCG646072 v2.1 NL-21 -0041 Page 1 of 1 DOMINION ENERGY SC INC VC SUMMER NUCLEAR STATION OFF-SITE WATER SYSTEM Fairfield COUNTY

Dear GEORGE A LIPP ARD:

A review of the file for the referenced facility has found DOMINION ENERGY SC INC VC SUMMER NUCLEAR STATION OFF-SITE WATER SYSTEM to be in violation of the South Carolina State Environmental Laboratory Certification Program. Sampling and analysis for Total Residual Chlorine was not conducted by a South Carolina certified laboratory as required by Regulation 61-81.E.

You are hereby notified that failure to comply with sampling and analysis requirements is a violation of the Pollution Control Act, S.C. Code Ann. 48-1-1 l0(d) (Supp. 2020) and Water Pollution Control Permits, 3 S.C. Code Ann. Regs. 61-9.122.4l(a) (Supp. 2020). The violations make DOMINION ENERGY SC INC VC SUMMER NUCLEAR STATION OFF-SITE WATER SYSTEM subject to further enforcement action, which may include assessment of civil penalties as set forth in the Pollution Control Act, S.C. Code Ann. 48-1-330 (2008).

Since an explanation was previously provided, a written response to this Notice of Violation is not required at this time. This response, however, will not relieve DOMINION ENERGY SC INC VC SUMMER NUCLEAR STA TJON OFF-SITE WATER SYSTEM of responsibility for the violations cited.

If you have any questions concerning this notice, you may contact me at 803-898-3565 or TUCK.ERKS@dhec.sc.gov. I will be glad to assist you.

Sincerely, Kristian S Tucker Compliance Officer Bureau of Water cc:

Midlands EA Columbia