ML20115H261

NPDES Noncompliance Notification:On 850314,free Residual Chlorine Concentration Greater than 2 Ppm Measured Every Day During Wk of 850311.Caused by Insufficient Contact Time Between Sewage Plant Effluent & Chlorine Disinfectant

ML20115H261
Person / Time
Site:	LaSalle
Issue date:	04/09/1985
From:	Diederich G COMMONWEALTH EDISON CO.
To:	James Keppler ENVIRONMENTAL PROTECTION AGENCY, ILLINOIS, STATE OF, NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
NUDOCS 8504230036
Download: ML20115H261 (3)

Text

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., 'N Commonwealth Ed son

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, c: I.aSalle County Nuclear Station f

\ - - )') Marseilles,

Rura; Illinois Route61341 #1, Box 220

\ / Telephone 815/357-6761 April 9, 1985 Mr. James G. Keppler Regional Administrator Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137

Dear Mr. Keppler:

In accordance with LaSalle County Station Unit 1 and Unit 2 Facility Operating Licenses NPF-11 and NPF-18, Appendix B, Section 3.2, we are submitting to you a copy of the NPDES noncompliance for LaSalle County Nuclear Generating Station Permit No. IL0048151.

$.0 k G. J. Diederich Station Superintendent LaSalle County Station

'GJD/FRL/SKS/kg Enclosure xc: NRC Resident Inspector INPO - Records Center US NRC Document Control Desk eso423oo36 eso4o, APR161985 PDR ADOCK osooo373 S PDR h )

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c_t LaSalle County Nuclear Station Ruf at Route #1. Box 220

• %' Marseilles, Illinois 61341 i . .

Telephone 815/357 6761 March 22, 1985 U. S. Environmental Protection Agency Region V, Enforcement Division

! ATTN: Chief, Compliance Unit 1

230 South Dearborn Street l Chicago, IL 60604 1

i Illinois Environmental Protection Agency l Division of Water Pollution Control

' Compliance Management Unit 2200 Churchill Road Springfield, IL 62706 l

Subject:

NPDES Noncompliances for LaSalle County Nuclear Generating Station - Permit No. ILOO48151 In accordance with Standard Condition 12, we wish to submit the following j notice of a noncompliance which is listed on the attached table.

i If there are any questions, please contact Steve Davis of my staff at (815) 357-6761, extension 487.

l

' Gy J. Diederich Station Superintendent i GJD/PRL/SKS/psk xc: Director of Water Quality, Environmental Affairs Manager, Nuclear Stations Division l .

l DOCUMENT ID 0070h/0250A ,

I

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LASALLE COUNTY NUCLEAR GENERATING STATION N.P.D.E.S. PERMIT NO: IL0048151 NONCOMPLIANCE REPORT DISCHARGE NUMBER AND DESCRIPTION: No. 001(b) Sewage Treatment Plant Effluent PARAMETER AND PERMIT LIMIT: Fecal Coliform, 400 counts /100 ml NONCOMPLIANCE, DATE, AND DURATION: 733 counts /100 al, 13 MAR 85, unknown Resample 700 counts /100 al, 15 MAR 85, unknown CAUSE OF NONCOMPLIANCE:

The chlorine feeder at the Sewage Treatment Plant appeared to be operating properly. A free residual chlorine concentration of greater than 2 ppm was measured every day during the week of llMAR85. Results from a resample on 15 MAR 85 confirmed the initial analysis result. The cause of these excursions is suspected to be due to insufficient contact time between the Sewage Treatment Plant effluent and chlorine disinfectant. Although the samples exceeded the 400 count /100 ml limit, the Sewage Treatment Plant effluent to the lake probably did not.

CORRECTIVE ACTION:

Efforts will be made to sample the Sewage Treatment Plant effluent after there has been more contact time with the chlorine disinfectant.

DATE RECOGNIZED AS A VIOLATION: 14 MAR 85 DATE INVESTIGATED: 15 MAR 85 DOCUMENT ID 0070h/0250A /

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