ML20082R783

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NPDES Noncompliance Notification:On 910703,Unit 1 Chemical Waste Sump at Discharge 101 Exceeded Daily Max Spec of 100.00 mg/1 Total Suspended Solids.Regenerant Hold Tanks Inspected for Excessive Corrosion
ML20082R783
Person / Time
Site: Beaver Valley
Issue date: 08/23/1991
From: Noonan T
DUQUESNE LIGHT CO.
To:
ENVIRONMENTAL PROTECTION AGENCY
Shared Package
ML20082R781 List:
References
NUDOCS 9109160246
Download: ML20082R783 (2)


Text

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'Af Ttiephone (412) 3916(300 Nucleaf Group P O Bon d ShippingNd PA IS077 MM August 23, 1991 United States Environmental Protection Agency ,

Region III, Pennsylvania Section (3WM53)  :

Nater Permits Branch .

Water Management Division 841 Chestnut Street '

Philadelphia, PA 19107 i

EPA Permit No. PAQO25615 Rencrtable Occurrence

Dear Sir:

As required by the EPA 'ermit No. PA0025615, the following information is provided in regard to a reportable occurrence at Beaver Valley Power Station.  ;

Discharge 101, Unit One Chemical Waste Sump, exceeded the daily  !

maximum specification of 100.00 mg/l Total Suspended Solids (TSS) on July 3, 1991 when the daily maximum was 112.80 mg/1. This high value also caused the monthly average TSS value of S3.52 to exceed the monthly average TSS Specification of 30.00 mg/1.

The July 3 sample was collected directly following a regeneration l of the cation demineralizer and was abnormally high in precipitated  !

iron. A follow-up sample was collected on July 5, with a TSS value of 23.30 mg/1. Although operation of the sump continued through the month without further occurrence, plant maintenance is inspecting regenerant hold tanks for excessive corrosion which may be i contributing to the suspended solids. f I

Since this event was limited to a single batch discharge (17,000 gallons) of the Chemical Waste Sump, then no significant environmental harm or impact is expected.

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9109160246 910923 POR ALOCK 05000334 G PDR r

g If you have any questions concerning this report, please do not hesitate to contact me.

Very truly yours,

/ - ~

T. P. Noonan General Manager DNH/ijj

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