ML20008E674

Submits NPDES Noncompliance Notification.Sewage Treatment Plant Effluent Samples Collected on 810127-0217 Revealed Less than Min 1.0mg/1 Dissolved Oxygen.Cause Is Unknown. Treatment Efficiency Was Reduced by Ambient Temp Decreases

ML20008E674
Person / Time
Site:	Sequoyah
Issue date:	03/03/1981
From:	Elashry M TENNESSEE VALLEY AUTHORITY
To:	Patrick J GEORGIA, STATE OF
References
NUDOCS 8103090409
Download: ML20008E674 (2)

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TENNESSEE VALLEY AUTHORITY Mannes. TENN&sses 37828  !

215 Natural Resources Building ,

NARCH 3 198]  !

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Mr. James R. Patrick, Jr. , Chief j Compliance Section, Water Enforcement Branch i

Environmental Protection Agency, Region jIV 345 Courtland Street j Atlanta, Georgia 30365 F

Dear Mr. Patrick:

NOTIFICATION OF NONCOMPLIANCE WITH EFFLUENT LIMITATIONS - NPDES PERMIT N0. TN0026450 - SEQUOYAH NUCLEAR PLANT [

Description of the discharge--Discharge 002 - Sewage treatment plant effluent. l Samples collected on the following dates contained less than the minimum i

1.0 mg/l dissolved oxygen.

t Date Dissolved Oxygen mg/l j i

1 81 0.6 1-28-Si 0.6 l' 1-30-81 0.5 .

2 1-81 0.9 i

, 2-2-81 0.5 i 2-3-81 0.7 -

2-17-81 0.7 l

4 Samplu collected on February 16 and 18,1981, had pH values less than the  !

min. mum pH limit of 6.0 units. Both samples had pH values of 5.8 units. l l

Cause and period of the noncompliance--Ine cause of the noncompliance is i unknown; however, we believe that decreases in ambient temperature and in i organic and bydraulic loadings (because of a decrease in the number of  !

personnel), ond improperly set air cycles reduced the plant's treatment -

efficiency.

Steps taken to reduce, eliminate, and prevent recurrence of the noncomply_ipi  ;

discharge--Plant operations have been reviewed and air cycles have boca changed l to try to correct the low dissolved oxygen problem. The pH was increased by  ;

adding sodium bicarbonate to the plant.  ;

Sincerely, j i  !

Mohamed T. El-Ashry, Ph.D.  !

Director of Environmental Quality i cc: See page 2 ,

8103090409 .

! An Equal Opportunity Employer

MAP.CH 3 1981 Mr James R. Patric!;, Jr.

cc: Tennessee Depart:;'ent of Public 'iealth Division of F.'ater Quality Contial c21 Cordell Hull Building Nashville, Tennessee 37219 ,

Mr. Harold E. Denton, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Co;;ciission 7920 Norfolk Avenue Washington, DC 20555 fir. Ja es P. O'Reilly, Director Of fice of Inspection and Enforce:.:ent U.S. l,uclear Regulatory Comission i Region II - Suite 33C3,101 ' arietta Street Atlanta, G orgia 30303 ,

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