ML20332A033

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Report of Violations of the National Pollutant Discharge Elimination System Permit
ML20332A033
Person / Time
Site: San Onofre Southern California Edison icon.png
Issue date: 11/18/2020
From: Bates A
Southern California Edison Co
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML20332A033 (7)
v • d • e


Text

AJ Bates Manager Regulatory Affairs An EDISON INTERNATIONAL~ Company November 18, 2020 Environmental Protection Plan U.S. Nuclear Regulatory Commission AlTN:*oocument Control Desk Washington, D.C. 20555-0001

Subject:

Docket Nos: 50-361 and 50-362 Report of Vlolatlons of the National Pollutant Discharge Elim Ination System Permit San Onofre Nuclear Generating Station (SONGS), Units 2 and 3

Dear Sir or Madam:

Provided as Enclosures to this letter are copies of two responses to violations of the National Pollutant Discharge Elimination System (NPDES) Pemiit for the San Onofre Nuclear* Generating Station (SONGS). These violation responses, which were originally submitted to the San Diego Regional Water Quality Control Board, are being provided to the NRC as required by the SONGS Environmental Protection Plan, Section 3.2. The Environmental Protection Plan is Appendix B to the SONGS Units 2 and 3 Operating Licenses.

On July 16, 2019, SONGS.had an exceedance of the Oil and*Grease daily instantaneous maximum limit. The response to the resulting NPDES pem,it violation is provided in Enclosure 1.

On March 24, 2020, the onsite sewage treatment plant experienced an unexpected influent and potentially release between 6,000 and 7,000 gallons of partially treated sewage into the Pacific Ocean.

The response to the resulting NPDES permit violation is provided as Enclosure 2.

There are no commitments contained in this letter or its attachments.

If you have any questions, please contact me at (949) 368-7024.

Enclosures:

1. SONGS response to RWQCB on Oil and Grease Exceedance
2. SONGS response to RWQCB on Sewage Release cc: S. A. Morris, Regional Administrator, NRC Region IV A. M. Snyder, NRC Project Manager, San Onofre Units 1, 2, and 3

Enclosure 1 SONGS response to RWQCB on Oil and Grease Exceedance

SCE-RWQCB-LTR-0002

~ SOUTHER>-: CAUFORNIA u* '=,01s*oN* Blian- p. Metz, Bnvil;omnehtal J;kromin~oning Agcut_Ov~ghf

- An BDISOH ~ATIONM.4 ~

~alist July.25, 2019 Mi. Beh Neill

~gional Water Quality Control Board,_Sa.n Diego

!1/4;n.N'-'.il1@3/ater1?<>w:$,ca:_gov: _

~anbi~~o,@ 'Ya~S;cjl.g gy Attn: BN¢ill -

YIA E..:MAIL TRANSMITTAL:ONLY

~ubjeyt: SONGS Oij. .&qre~ p~y Instanuµieous -Maximum Exceedance Report*- NPDES Perrilit Nunilier CA01(}9282; Ord~~t°Ntpft~ ~~2015-007J Pear.Mt, Neill:

As discuss'ed with you over the.phone on 7/23/19-~t 14:0~, SONGS had~ e-;ic~Bh-~ of the'.Oil

& ~-~Y-~~~~ m~um limit :on 771 ~;ti9. 'Below 1s the written sotru:flary of:the event and.corrective ~ctioJ;1Swe. took _tQ comply with, our ;NP~ permit (CA-01.09282).

A monthly" sru:npl6- (S~le-#1) and a. gµpµ~e s_ample-~@mple #'tj were collected from the Common 0il Removal Systefu (id~tiµed as 002-L ili ~-~DES. ~ t ) OQ. 7/16/19.

Sample #l w~ collected on 7/16.(19 at 11 ~04; $mil.pl~ #1_ w,~ ~yze<j on 7/1$/1,9 at 16:25, TQ.e resµlro.btafoeq OJ;). 7/I.8/i9'fQr Sam.P,le.#1 w:as*42:o mg/L,_.which was validat¢on 7/t/l/1-9 at

  • 1.6:SO, whi~~ ex.¢ed.ed :fue daily ~tµl~l.U1 i;riaxim~Jimjt_o(20.~g,'L.
  • Sample.#']. w~,9('.>Uected ~7/J6/.19. a_t-1 J:O~ (taken Lminm:e,~_S ample:#I);.Sa mple#2 was analyzed on i/18/(Q M17:56. The result-obWh,ed,on 7/\8(19 fot"Saniple-#2 .was--~.1 mg/L~ which als~hv~_vali ~~~on 7/22/19,_at }6:50. * *
  • 1 Tu,rbine plant ~lJlllps:pµmps :w~ tum_ed off via a no~ process on 1116719 ~ appry~~Y i 1:05 once the -rilrin~y sfµ11ple§ weiy optajne4.

AdditiQnally,, ~ oil absorbent bo9m is aJways_in place.at_ the_cli$charge point from the Coritmon Oil Removal System. &o, the water which exceeded the in;suµitaneous majqmu¢ limit WQt:µd, haye ~ treated: wi~ the aj,sorb~t Q()Qt_n prior to discharge. Several pieces ofwhat the sampling technician considered to be organic material w~ o~ed in-the sample botlle for

&µnple #I. . - . - .

Until the validation of the samples were confume4 al) the swnps wit4inpµ_t to the C-Ommon OiJ Removal System ~ere ~ed to ~'off' on 7/l.9/19 at approximately 12:30 until the samples ~uld be validated on 7!22/19.

Rage 1 of2

- . SOIJ1ttERN OOIFORNIA E.J EDISON~ Brian i>.*Metz Envl~ental

~issio~g Agent Oversight:

AD ED_~ IN'IBRNA710,liAL~ Cooi,i,ny Specialist San Diego R~onal Water ,Quality Control Boru-d was contacted to provid~ the required 24-:hour verbal report op_ 7/23/19-at 14:Q§.

  • The period ofnon~mp)ian~, in_pluding.ex.a,efdates and titnes.:wits-exactly*i tJJ#jute, between Sample #1 on 7il6/19 at 11:04 and Sanipk#2 on ?/16/19 at U:05 $ch~ wh~ th~ sampling.

!;'volution occµrred. ** *

  • Corrective acJ~on: On 7/23/1 ~. algae and dc,bris buildup across the di~~ge w~ii was remov~.

~g-a shop v.acliltin ari<f th~ sygem W:~ put:into a,recircµlation cgrr.fi~on. The Comm:on:Oil Removal System is inspected on a weekly* ha$is ani;l the ~eir wilJ. b~ mohlt~ quring ~

inspe¢ti_on. A routip.e preventative mainte$llee schedule~ also be established.

A. confii.matiOJ?. Sfµnple was ~llected after weir c l ~ was compieted with thy system in tecircµlation coilfi~p:o~ S~p~gperfopned on 7,~4/l9 (sample collectet at 09:00-and cmaiyzed ~ 11:45, restilt*'wS$ < 5 mg/L}*oonfir:tned th~_~e-Conµn.911 Oi\ Refuov~:syst$ 90\lld be put back iµto op,erafion.,

Four additiqnal ~l~s wer.e.collected*on:7/24/19 and 7!25119 wliile the Comino_n Oil Removal SY$fem ~ ¢ the Turbin~ Pl8!1t Sump~~ no~.pro~'fl9w,~~-.A il Tesuits were,< 5

~git. A4ditional samples .were ~en minutes before-Sample #1 dupng an an,n¢µ sample evolution' ~d the ,analysis al&o confume<l th~ oil ~d ~ level was significantly below the required 15 mw'I, ni:ontbly average*: All iritetn~ or ~te,fual l~b: ~ysis resiJIY3 are available upon recwesl ~ montply san;ipl,ing ~olutions allowed us to identify a- potential issue early; correct and-plThaddit;Lo~-correctiye ~ol).s~~ pJa~ to prevt?ll,t. ~

  • if you ]J.avQ any _questions, .please contact me at (949))6_8-73 p.'

CC: Stevie V ~ughan - SCE Brian Coutµre - SDS Amand

' . ~ . 's*1,0.~

  • nl,.

Leticia Brambila - 'SCE Document Control SDS/Do~~t Contrri1 .- . -

Page2of2

Enclosure 2 SONGS respi5nse toRWQCB on Sewage Release

SCE-RWQCB-LTR-0008

~Ei5iSON*

,An EDISON' llffF.RNKflONALofi t.'lmJ,tr1Y Brian D. Metz Environ01entai Deco~loning Agent Ov~t March 30~ 2020 Mr. Ben Neill Regional Water Quality* Control B<;>ard, San Di~go 2375 Northside,Drive Sui~ 100 -

San Diego, California 92108 Ben.Neill@waterboards;ca.gov SanDie~~@waterboards;ca.gov Attn: BNeill VIA E-MAIL TRANSMITTAL ONLY

Subject:

SONGS Sewage Treatment Plant Upset Report; - NPDES Permit Number CAO 109282; Order Nuniber R9-,2015-0073 Dear Mr. Neill!

San Onofre Nuclear Gen~ting Stati~n (Station) experi~nced an upset condition at the on.site S~wage treatment Plant (STP) as defined by 40 CFR.section 122.41 (nXl) *and provided the San Diego R,egio~ Water Quality Control Board with verbal notification of~~ event at 2123 hours0.0246 days <br />0.59 hours <br />0.00351 weeks <br />8.078015e-4 months <br /> on 25 March 2020, followed by wi email.on 26 March 2020. B.elow is a written summary of the event and 99~~tive actions w~ hav:~ implemented to comply with our NPPES permit (CA0109282). -

Due to an influx of appi;-oxitnately 20,000 gaj.lons of unknown.influent after work h9urs on 24 March 2QZO, the STP was overwhelmed and potentially released between 6,000 and 7,000 -

gallons of partially treated sewage wastewater to the Unit 2 ocean con4uit. Prior to release to the conduit, this effluent was diluted wit4 salm:ater (minimum 10:1 ratio as req,uired by the NPDES Permit) ~d then dlsc~ed through the mile-long cond:uit into the oooµi. Bas~ on 'the STP state-certified operator's (Integrated Performance Consultants, registration number CO 0083) discharge records for the peri.Qd of noncompliance is estimated to be frqm 0530 to 0730 hours0.00845 days <br />0.203 hours <br />0.00121 weeks <br />2.77765e-4 months <br /> on 25 March 2020. ..

~wiate:st~ps implemelite.d or planned to re4uce, eliminate, and pre:vent reoccurrence of the noncompliance: . .. -

  • The operator from IPC isolated the effluent pumps to prevent further release of potentially non-complaµuµit effluent to the efil.uent basin.
  • The effluent pum~ were secured in the off position.
    • To minimize influent quantity, the trajlsfer,pumps at_the Mesa we~ turned off and the site bathrooms were close4. Portable toilets/sit:;tks were mobilized to the site.
  • On 27*March 2020 removed approximately 50,000 ga,llons of wastewater from the STP digester and aeration tanks to three temporary Baker Tanks.

Page 1 of2

Bl SOUJHERN CAI.IFORNtA

~-EDISO-N~ Brian D. Metz Environmental Decommissioning Agent Oversight

  • On 28 March 2020 plaped the effluent into recirculation mode and began bi.ological process recovery at the STP.. This e:rfort is expected for 5-10 days and the site bathrooms were placed back in service on 49 March 2020. * -
  • We continue to inyestigate the_soure:e _of the 20,00o+ gallon influx flow ~d it is unknown at this time. The area has receiv~ coD:Siderable rain ove{'. the last-few we;eks.

The STP -influent and effluent-~ainples will be monitored to confirm compliance with the NPDES perpiit limits pri9r tp pl{lCmg _the STP back.in service. In the meantime, the operator will continue to monitor th~ perfonruui_~ of the STP and make the necessary adjustments to ensure ongoing compliance.

Corrective actions cnrren~ be~g evaluated:

  • Imprqve timing of alarm notifications to the STP operator IPC, such as use of a telephonic al.aim dialer. *
  • Repair minor annular gaps in cli~9-er walls within the STP to minirnire the commingling of digested sludge with the influent -
  • Evaluate alternate mfl_uentpUIIip co~~ls from a "~d" pumping system. to a "dosing" coxwguration.

-* Following investigati9n of potential influx flaw, n:iinintlze potential future inflows.

  • Empty wastewater from the* Baker Tanks ei~er *back into the STP, off-site c:lisposaj or some combination thereof. -

We will continue to keep you apprised of the situation. and records are available upon request If you have any questi9iJ.s, please contact me-at (714) 273-6418; "l certify under penalty oflaw that this d ~ and all attachments were prepared undfll' my direction or supervision in accordance wl!h a system designed to assure that q11alified personnil properly gather a,,d evaluaie the i!lfannatio!J suhm!(ted. Based on my inquiry oft~e person or persons who manage the system or. those persons directly responsible for gathering the information, the infonnation submitted is, to the best ofm:y knowledge and belief, true, ac~ate, andwmplele. l'cnn aware that ther,e ate stgniftcimt penaltie;sfor submiltlngfalse information, including the-possibility offine and tniprlsonment for knowing violations. !' *

  • CC: Ron Ppntes - SCE Stevie Vanghan - SCE Bri~ Couture -SDS Amand~ Singh- SD$

Leticia B:rambil~ - SCE Document Control SDS - Dociunerit Control Page2 ofl

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