ML19323D037

Notifies That 800402-04 Yard Drainage Pond Effluent Ph Was Greater than Max NPDES Limitation.Caused by Grouting Matl Entering Yard Drainage Sys Through Pipe Penetrated by Core Drilling.Const Personnel Will Halt Grouting Operations

ML19323D037
Person / Time
Site:	Sequoyah
Issue date:	05/19/1980
From:	Elashry M TENNESSEE VALLEY AUTHORITY
To:	Patrick J ENVIRONMENTAL PROTECTION AGENCY
References
NUDOCS 8005190561
Download: ML19323D037 (2)

Text

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8005190561 TENNESSEE VALLEY AUTHORITY Nonnes. TENNassas 37S28 /

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Q I Mr. James R. Patrick, Jr. , Chief Water Enforcement Branch Environmental Protection Agency, Region IV 345 Courtland Street, NE.

Atlanta, Georgia 30308

Dear Mr. Patrick:

NOTIFICATION OF NONCOMPLIANCE WITH EFFLUENT LIMITATIONS - NPDES PERMIT NO. TN0026450 - SEQUOTAE NUCLEAR PLANT Description of the discharge--Discharge No. 007 - Yard Drainage Pond Effluent. From 1200 EST on April 2, 1980, until 1130 EST on April 4, 1980, the affluent pH was greater than the maximum permit limitation of 9.0 units. Samples were collected approximately once each two hours and the pH gradually increased to 10.4 units at 1800 EST on April 2, 1980, and then gradually decreased until it was less than 9.0 units. This report was inadvertently not submitted within the required five day period.

Cause and period of the noncompliance--Core drilling holes near the i condensate desineraliser waste evaporator building were being grouted on April 1 and 2, 1980. About 15,000 pounda of grouting material (Portland cement plus line mixture) entered the yard drainage system through a pipe which had been penetrated by the core drilling. The grouting

! operation stopped at 1100 EST on April 2,1980, but the grout in the yard drainage system kept the pH above 9.0 units until 1330 EST, on April 4, 1980. Thus, the period of noncompliance was approximately 49 ,

hours. There were no observed fish fatalities during the period of '

i noncompliance in the yard pond. i

, Steps taken to prevent recurrence of the noncomplying discharge--

Construction personnel were told at 1430 EST on April 2, 1980, to halt all grouting operations in and near the condensate domineralizar wasta evaporator building tuttil they eliminated the flow path of grout into  !

the yard drainage system.

Sincerely, I

Mohamed T. El-Ashry, Ph.D.  !

Director of Environmental Quality of I

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An Equal Opportunity Ernotoyer l

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Mr. James R. Patrick, Jr.

NorIPICATION OF NONCOMPLIANCE WITH EFFLUENT LDETATIONS - NPDES PERMIT NO. TN0026450 - SEQUOYAE NUCLEAR PLANT cer T=== masse Department of Public Health Division of Water Quality Control 621 Cordell Hull Emilding Nashville, Tennessaa 37219 Mr. Harold R. Denton. Director -

4 Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory emf maion 7920 Norfolk Avenus Washington, D.C. 20555 Mr. Janes P. O'Railly, Director Office of Inspection and Enforcement U.S. Nuclear Regulatory Psa==4=mion, Region II 101 Marietta Street Atlanta, Georgia 30303 l

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