ML20211H393

NPDES Noncompliance Notification:On 860514,sewage Treatment Plant Influent Flow Exceeded Capacity of Polishing Pond. Caused by Backup Pump Having No Flow Control Capability. Pump Repaired & Pond Cleaned

ML20211H393
Person / Time
Site:	LaSalle
Issue date:	06/12/1986
From:	Diederich G COMMONWEALTH EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
NUDOCS 8606230501
Download: ML20211H393 (3)

Text

- - _ _ _ _ _

dad

+e * * [;N Commonwealth Edison LtSilia County Nuctrir Station

) Rur:1 Rout 3 #1, Box 220 PRIOR!iY RO'JTING M; sn,g

} ;v_ . :7 Marseilles, Illinois 61341 g hA sc

/ Telephone 815/357-6761

{[A__[{}__

ML g-UTS

&l M FILE/

As June 12, 1986 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 In8n11e County Station Unit 1 and Unit 2 Facility Operating License NPF-11 and NPF-18, Appendix B, Section 3.2, we are submitting to you a copy of the NPDES noncompliance for IaSalle County Nuclear Generating Station Permit No. ILO0h8151.

p.O. U b G. J. Diederich Station Manager IaSalle County Station GJD/ IRA /RHK/kg Enclosure xc: NRC Resident Inspector INP0 - Records Center US NRC Document Control Desk fI v

e

' I JUN 161986 8606230501 860612 PDR ADOCK 05000373 S PDR

T:

Commonwo-Ith Edison

• -, * . c LaSalls County Nucl:ar Station -

a Rurzl Routa #1, Box 220 k' ~ Marseilles, Illinois 61341 Telephone 815/357-6761 May 19, 1986 U. S. Environmental Protection Agency Region V, Enforcement Division ATTtJ: Chief, compliance Unit 2'10 South Dearborn Street Chicago, 11, 60604 Illinois Environmental Protection Agency Division of Water Pollution Control Conipliance lidtiagement Unit 2200 churchil1 Hoad Springfield, IL 62706 Deat Sir :

Subject:

ilPDES !!oticotapliances for LaSalle County Unclear Generating Station - Permit No. IL0048151 4

In accordance with Standard condition 12, we wish to submit the folloulng notice of noncompliances which are listed on the attached tabic.

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

)rkN

". J. Diederich Station 11anager GJD/I.RA/HIIK/jdp xc: Director of Water Quality, Environmental Affairs Managor, Nuclear Stations Division 1

m

.=: f t

F e , LASALLE COUNTY NUCLEAR GENERATING STATION N.P.D.E.S. PERMIT NO: ILOO48151 NONCOMPLIANCE REPORT DISCHARGE NUMBER AND DESCRIPTION: 001 (s), Sewage Treatment Plant Effluent 4 PARAMETER AND PERMIT _ LIMIT: Total Suspended Solids, 60 ppm daily maximum NONCOMPLIANCE, DATE, AND DURATION: 71 ppm Total Suspended Solids, 14May86, 6 hours. CAUSE OF NONCOMPLIANCE: N The Sewage Treatment Plant (STP) influent enters the equalization tank

• where it is pumped out by one of two pumps. The normally operated pump is the electric submersible, which has the capability to control level in the equalization tank via float switches, and also has a splitter box in the discharge line designed to equalize daily flow surges by recirculating excess flow back to the equalization tar;k. The backup pump is an air-lift pump with no level or flow control capability. The electric submersible pump had been experiencing low flow for several months, so the backup air-lift pump had been placed into operation. An unusually large Sewage Treatment Plant influent flow during the day of May 14, 1986, resulted in the system flow exceeding the effluent flow capacity of the one polishing pond in operation. The pond level rose above that of the outlet baffle designed to hold floating solids cut of the effluent pipe.

J CORRECTIVE ACTION: The west polishing pond has been cleaned and returned to operation. On 19May86 both polishing ponds were placed in operation. The electric submersible pump (OSTO7P) will be repaired under work request #L58508.

                                                                  'i r

DATE RECOGNIZED AS A VIOI.ATTOM: _ 14May86 DATE INVESTIGATED: 14May86 4 4 9

                                                                                                    'i

__}}