W3P85-1094, NPDES Noncompliance Notification:On 850703,during Collection of Weekly Samples,Ph at Outfall 004 Was 4.8 Su,Outside Permitted Range of 6-9 Su.Caused by Sludge Retention Time Being Too Long.Neutralizing Solution Added

NPDES Noncompliance Notification:On 850703,during Collection of Weekly Samples,Ph at Outfall 004 Was 4.8 Su,Outside Permitted Range of 6-9 Su.Caused by Sludge Retention Time Being Too Long.Neutralizing Solution Added

ML20128L852
Person / Time
Site:	Waterford
Issue date:	07/10/1985
From:	Barkhurst R LOUISIANA POWER & LIGHT CO.
To:	Knudson M ENVIRONMENTAL PROTECTION AGENCY
References
W3P85-1094, NUDOCS 8507250132
Download: ML20128L852 (1)

Text

Reissued; original issued w/out date LOUISIANA ida oeu naNoe Srneer P O W E R & L I G H T! P O BOX 6008 . New ORLEANS.. (So41 LOUISlANA 366-2345 70174 SuSNsysM July 10, 1985 93P85-1094 3-A25.01.02 A4.10 0

Mr. M.O. Knudson, P.E.

Director, Water Management Division Environmental Protection Agency

• Region VI First International Building 1201 Elm Street Dallas, Texas 75270

SUBJECT:

Waterford Steam Electric Station Unit Number 3 NPDES Permit Number LA 0007374

Dear Mr. Knudson:

On July 3, 1985, at approximately 7:40 A.M.,'the pH at outfall 004 was 4.8 SU, which was outside the permitted range of 6-9 SU. We became aware of this noncompliance when collecting the weekly NPDES samples. The sewage treatment plant which discharges through this outfall has been operating well in all respects, effectively treating the sewage: both BOD 5 and TSS have been well within effluent concentration limits, and the physical appearance of the plant is good. However, as there is not a lot of flow through the plant, it is thought that sludge retention time may be too long, and that the increased sludg"e ' age may be causing the reduced pH.

Sludge is being removed from the plant to decrease the overall sludge age, and return the plant to a proper pH range. However, a neutralizing solution was added to the plant upon discovering the low pH to immediately return the outfall to compliance. A sample collected at approximately 1:00 P.)i. in-dicated a pd of 6.4 SU, verifying that the outfall had returned to within compliance levels.

Should you wish to discuss th;s matter further, please contact uindi Groome of our Nuclear Licensing Office at (504) 595-2846.

Very truly yours, IV l LW 8507250132 050710 PDR ADOCK 05000302 R.P. Bar hurst g PDR Plant Manager-Nuclear RPB/CDG/ch ,

cc: J. Dale Givens'- LA DEQ US NRC - R.D. Martin - Region IV #0 C.W. Knighton - NRR'