ML20236J174

NPDES Noncompliance Notification:On 870911 & 24,biochemical Oxygen Demand of Two Samples from Discharge Point 501 Exceeded Monthly Average Permit Limit.Caused by Excessive Carryover from Clarifiers.Solids Passed Through Sys Reduced

ML20236J174
Person / Time
Site:	Peach Bottom
Issue date:	10/28/1987
From:	Leitch G PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	PENNSYLVANIA, COMMONWEALTH OF
References
NUDOCS 8711050175
Download: ML20236J174 (2)

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PHILADELPHIA A ELECTRIC COM PANY t23ot M ARKET STREET P.O. BOX 8699 PHILADELPHIA A. PA 19101 p , ,3 u , . ,,,, .

Octobor 28, 1987 GM AH AM M. LESTCH

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Department of Environmental Resources Bureau of Water Quality Management One Ararat Blvd.

Harrisburg, PA :17110

SUBJECT:

Noncompliance with NPDES Permit Peach Bottom Atomic Power Station i Permit No. PA 0009733 Gentlemen:

DESCRIPTION OF NONCOMPLIANCE:

The BOD of two samples from. discharge point 501-(Sewage

' Treatment Plant) exceeded the monthly average and the instantaneous maximum permit limits.

Date' Sample Taken: 9/11/87 9/24/87 Date Results Received: 9/19/87 .10/5/87 Results-of Analysis: 38 mg/l 96 mg/l Monthly Average Analysis: 67 mg/l Monthly Average Permit Limitation: 30 mg/l Monthly Average 60 mg/1-Instantaneous' maximum CAUSE OF NONCOMPLIANCE:

1 The cause of the noncompliance was excessive carryover from the clarifiers. Clarifier carryover was due to poor settling characteristics of the solids. This has been an occasional problem with the clarifiers. Also, the pressure filters had been removed from service due to a broken sparger plate.

DURATION OF NONCOMPLIANCE:

The duration of-the noncompliance was the entire month of September, {

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CORRECTIVE ACTION:

The corrective action was to reduce the solids being passed through the system.

1 8711050175 871028 PDR S

ADDCK 0S000171 PDR

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• PREVENTION OF FURTHER OCCURRENCES:

The damaged pressure filter is being repaired and will be returned to service by.the end of October. An engineering consultant (BCM) was scheduled in to' evaluate operation of the sewage treatment plant. The BCM consultant visited on site on October 16, 1987. Per his recommendation the second aeration tank was put into service on October 19, 1987. A sewage  ;

treatment plant operator training course was contracted from BCM for several Peach Bottom employees. This course will commence November 5, 1987.

Very truly yours, JAV/ala cc: Environmental Protection Agency Water Permits Branch Pennsylvania Section 3WMS2 j 841 Chestnut Building  ;

Philadelphia, Pennsylvania 19107  ;

Director Administrator ONRR Region I US NRC Office of Inspection and Enforcement Washington, DC 20555 US Nuclear Regulatory Commission 631 Park Avenue King of Prussia, Pennsylvania 19406 I

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