ML20217N692

NPDES Noncompliance Notification:On 980107 Net Total Suspended Solids (TSS) for Units 1 & 2 Cooling Towers at Outfall 001 Exceeded NPDES Permit Daily Limit of 60 Ppm. Caused by Contaminated Sample Lines.Replaced Tygon Tubing

ML20217N692
Person / Time
Site:	Limerick
Issue date:	02/27/1998
From:	Boyce R PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Oneil S PENNSYLVANIA, COMMONWEALTH OF
References
NUDOCS 9803090140
Download: ML20217N692 (2)

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Robert W.Boyce Plant Manager Lrnenck Generating Staton 4

Y PECO NUCLEAR Sc 2*;aJre,'Ln A Unit of PECO Energy PO Box 230o

, Sanatoga PA 19464-092o 610 718 2000 l February 27,1998 i

l Steven J. O'Neil Chief, Operations Section Department of Environmental Resources Bureau of Water Quality Management Suite 6010, Lee Park 555 North Lane i Conshohocken, PA 19428 l

SUBJECT:

Limerick Generating Station, Unit 1 and 2 Non-Compliance of NPDES Permit No. PA4051926

Dear Mr. O'Neil:

Description of the Non-Comoliance:

On January 7,1998, the Net Total Suspended Solids (TSS) for the Unit 1 and Unit 2 cooling towers at Outfall 001 was identified to be 90.5 ppm, thereby exceeding the NPDES permit daily limit of 60 ppm. j Cause of the Non-Comoliance:

The cause of the elevated Net TSS daily limit has two causal factors:

e First, the sample line was contaminated which resultad in the weekly Net TSS reading higher than actual. This was evident since the Outfall 001 zinc concentration was 2 times greater than the average of the individual outfalls for the Unit 1 and Unit 2 cooling towers. A previous investigation revealed that the sample tubing made of tygon needed to be replaced quarterly due to fouling. J l

= Second, during re-collection of the sample, a storm event occurred and created an elevated j suspended solids condition in the Schuylkill River. -

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,a' Actions to Prevent Recurrence:

O The tygon sample tubing has been replaced with stainless steel tubing to aid in the prevention of sample line contamination buildup. The elevated Net TSS resulting from weather and river conditions does not have an action to prevent recurrence.

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February 27,1998

,. Page Two if there are any questions please do not hesitate to contact Mr. Tim Moore at (610) 718-3400.

sincerely,

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cc: U.S. Nuclear Regulatory Commission Document Control Desk Docket Nos. 50-352/352 Washington, D.C. 20555 H. J. Miller Administrator, Region I, USNRC Docket Nos. 50-352-353 A. L. Burritt USNRC Senior Resident inspector, LGS Docket Nos. 50-352/353 Program Management Section (3WMS2)

Permits Enforcement Branch Environmental Protection Agency Water Management Division Environmental Protection Agency Water Permits Section Region ill i 841 Chestnut Building Philadelphia, PA 19107 i

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