ML20053E261

NPDES Deviation Notification:On 820514,excessive Amounts of Water Discovered Flowing Through North Run Off Ditch Into Cooling Pond.Caused by Lack of Check Valve in Vacuum Breaker Standpipe.Valve Replaced.Related Info Encl

ML20053E261
Person / Time
Site:	LaSalle
Issue date:	05/25/1982
From:	Holyoak R COMMONWEALTH EDISON CO.
To:
Shared Package
ML20053E242	List: ML20053E241 ML20053E261
References
DVR-1-1-82-44, NUDOCS 8206070740
Download: ML20053E261 (4)

Text

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DEVIATION REPORT irn ov, No.

01 01 62 44 STA UNIT YEAR NO.

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• /14 / A 7 0700 Wastewater Transfer Pumps Discharge Line - OTW898 0,1F

,,y, SY S T E*A AFFECTED PLANT STATUS AT TtME CF EVENT TESTING MODE PnR(MAT)

. LOAD (MnE) g CESCRIPTION OF EVENT Wastewatc.r transfer pumps discharge line OTW89B is lacking a check valve on the vscuum breaker standpipe.

This deficiency allows untreated wastewater to spill onto the ground and enter the Cooling Pond. This action is an N.P.D.E.S. Permi t violation for unmoni tored and untreated wastewater entering a " water of the State".

IC CFR50.72 N4C RED PHONE NOTIF ICATION MADE YES NO EcJlPMENT FAILURE 15398 5/17/82 F. R. Lawless caTr

@vts No noRx REcuEs T No.

R E s Pons 1 BL E SUFFRVisoR 2lCPER&TINGENGINEER'SCOMvENTS PART L.

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NON CEFOR T AB.E OCCURRENCE NA cpy REGION 11l DATE TIME 14 DA) REPORTABLE /T.S.

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Deviation Report Number:

1-1-82-44 11.

LaSalle County Station:

Unit 1 111. Event Description On 5/14/82, excessive amounts of water was flowing through the north run-off ditch, and into the Cooling Pond. Through investigation it was determined that the source of the water was a vacuum breaker standpipe for the Vastewater Treatment Lift Station Discharge Line OTW89B.

Untreated and unmonitored wastewater was being discharged from this standpipe, and flowing into the run-off ditch. This condi-tion is a violation of the Station's NPDES Permit No. ILOO48151.

IV.

Probable Consequences of the Occurrence This occurrence did not affect the health and safety of the general public.

V.

Cause Discharge Line OTW89B vacuum breaker standpipe does not contain a check valve to prevent the inadvertent spillage of wastewater during normal operation.

VI.

Corrective Action The initial interim corrective action was to plug the standpipe to prevent leakage.

Th'is was first done on 5/5/82.

Due to the pressures developed under normal operation, the plug kept coming out.

A per-

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manent corrective action to install a new check valve was initiated through Work Request No. 15398.

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@ Telephone 815/357-6761 Commonwealth Edison LaSalle County Nuclear Station Rural Route #1, Box 220 Marseilles Illinois 61341 f

May 17, 1982 U. S. Envi ronmental Protection Agency Region V, Enforcement Division ATTN: thlef, Compliance Unit 230 South Dearborn Street Chicago, Illinois 60604 Illinois Environmental Protection Agency Division of Water Pollution Control Compliance Management Unit

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2200 Churchill Road Springfield, Illinois 62706

SUBJECT:

NPDES Noncompilances for LaSalle County Nuclear Generating Station Permit,No. ILOO48151

1. -

Dear Sir:

In accordance with Standard Condition 12, we wish to submit the following notices of noncompliance. The Cooling Pond was blowing down at the timir of these noncompliances.

If there are any questions, please contact Mr. Charles L. Nash of ury staff, at (815) 357-6761, extension 235 1

n. n upe

• endent RL RHH/FRL/CLN/gew l

Director of Water Quality, Environmental Affairs cc:

Manager, Nuclear Stations Division

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LAS$LLE COUNTT NUdLEAR GENERATING STATION N.P.D.E.S. PERMIT NO:.

ILOO48151 NONCOMPLIANCE REPORT DISCHARGE NUMBER AND DESCRIPTION:

001c - Low Voluma Weste Wastewater Trsatment Facility (WWTF)

P m m AND PERMIT LIMIT:

Unmonitored, untreated discharge to Cooling Pond NONCOMPLIANCE, DATE, AND DURATION:

N/A,15 May 72, Intermittant p.

CAUSE OF NONCOMPLIANCE:

-A checkvalve for the vacuum breaker standpipe on the wastewater line This allows unitreated wastewater to spill (0,TW89B) to the WTF~ is missing.

out the standpipe and onto the ground. The spifled wastewater drains to a storm ditch, which ultimately flows into the Cooling Pond.

e CORRECTIVE ACTION _:

A work request has been written to replace (Install) the missing checkvalve as soon as parts can be obtained and installed.

14 May 82 DATE RECOGNIIED AS A, VIOLATION:

18 May 82 DATE INVESTICATED:

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