ML20099G487

NPDES Noncompliance Notification:On 840808 & 10,total Residual Chlorine Concentrations Exceeding Permit Limitation Detected in Grab Samples.Caused by Malfunction of Sodium Hypochlorite Pumps.Pumps Repaired

ML20099G487
Person / Time
Site:	Sequoyah
Issue date:	03/05/1985
From:	Rivers M TENNESSEE VALLEY AUTHORITY
To:	Marlar J ENVIRONMENTAL PROTECTION AGENCY
References
NUDOCS 8503140575
Download: ML20099G487 (3)

Text

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TENNESSEE VALLEY ' AUTHORITY KNOUVILLC. TE06PSESSEE 37902 i

l MAR 51985 Mr. John Marlar, lef Facilities Pep ormance Branch Water Managem,ent Division U.S. Envi,ronmental Protection Agency Region,JV 345 Courtland Street, NE.

Atlanta, Georgia 30365

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NOTIFICATION OF NONCOMPLIANCE WITH EFFLUENT LIMITATIONS - NPDES PERMIT NO. TN0026450 - SEQUOYAH NUCLEAR PLANT (SQN)

The enclosed notice of noncompliance was not included with the August discharge monitoring report (DMR) for the subject facility. However, these two noncompliances were noted in the DMR.

If you have questions, please call Michael Hines or Stephen R. Wells at (205) 386-2971 or FTS 872-8971 in Muscle Shoals, Alabama.

Sincerely, Original signed by

, Martin E. Rivers Martin E. Rivers, Director

Environmental Quality Enclosure cc (Enclosure)

(

Mr. Harold R. Denton. Director \

Of fice of Nuclear Reactor Regliation Attn: Document Control Desk U.S. Nuclear Regulatory Commission 7920 Norfolk Avenue Washington, D.C. 20555 Mr. Jack R. McCormick, Manader Chattanooga Basin Office Division of Water Management 2501 Milne Street Chattanooga, Tennessee 37406 9

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,(j1 An Equ.d Oppoittunty E niployer

Mr. John Marlar  ;

Mr. James P. O'Reilly, Regional Administrator Office of Inspection and Enforcement Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30303 Tennessee Department of Health and Environment Division of Water Management TERRA Building 150 Ninth Avenue, North i Nashville, Tennessee 37203 i

O i

I L____ . _ __

NOTIFICATION OF NONCOMPLIANCE WITH EFFLUENT LIMITATIONS - NPDES PERMIT NO. TN0026450 - SEQUOYAH NUCLEAR PLANT (SQN)

Description of the discharge--Discharge No. 112 - Sewage treatment plant effluent. Grab samples collected at 0940 on August 8, 1984, and at 1225 on August 10, 1984, had total residual chlorine (TRC) concentrations of 6.1 and 2.5 mg/L, respectively, exceeding the permit limitation of 2.0 mg/L.

Cause and period of the noncompliance--Malfunction of the sodium hypochlorite (Na0C1) pumps caused the TRC noncompliances. Additional grab samples collected and analyzed were as follows.

Date Time TRC Concentrations (mg/L) 8/07 0745 0.1 8/09 0815 2.0 8/10 1615 1.8 Thus, the maximum periods of noncompliance for the August 8 and 10 noncompliances were approximately 26 hours3.009259e-4 days <br />0.00722 hours <br />4.298942e-5 weeks <br />9.893e-6 months <br /> and 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />, respectively.

Steps taken to reduce, eliminate, and prevent recurrence of the noncomplying dischafae--The Na0C1 feed pumps have been repaired. Additionally, efforts are being made by SQN personnel to establish a steady TRC effluent concentration by varying concentrations of Na0C1 feed solutions and by adjusting the stroke (s) of the feed pump (s).

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