ML20052A465

Submits NPDES Noncompliance Notification.On 820217,samples of Concrete Batch Plant Settling Pond Effluent Exceeded Daily Max Permit Limitation.Caused by Excessive Rainfall Runoff.Runoff Will Be Rerouted Away from Settling Pond

ML20052A465
Person / Time
Site:	Sequoyah
Issue date:	04/23/1982
From:	Elashry M TENNESSEE VALLEY AUTHORITY
To:	Patrick J ENVIRONMENTAL PROTECTION AGENCY
References
NUDOCS 8204280353
Download: ML20052A465 (1)

Text

m .

/* TENNESSEE VALLEY AUTHORITY @ ' g K NOX VIL L E. T EN N ESS E t- .4 7'sO2 '

TVA Mailroom #  %

APR 231982 RECElVED -

Mr. James R. Patrick, Jr., Acting Chief

' APR 271982>

asumar n nemeru m li Water Permits Branch, Water Management Division s U.S. Environmental Protection Agency, Region IV S "8

//

345 Courtland Street, NE.

Atlanta, Georgia 30365 _,,

Dear Mr. Patrick:

NOTIFICATION OF NONCOMPLIANCE WITH EFFLUENT LIMITATIONS - NPDES PERMIT NO. TN0026450 - SEQUOYAH NUCLEAR PLANT Desciption of the discharge--Discharge No. 008 - Concrete batch plant

$0SY settling pond effluent - Two samples (one a duplicate sample) collected at '$:35 p.m. on February 17, 1982 contained an average total suspended solids concentration of 275 mg/1, exceeding the daily maximum permit limitation of 50 mg/1. The instanteous flow rate at the time of sampling was 0.19 MGD.

This discharge enters the condenser cooling water channel leading to the 32-acre diffuser pond that discharges through diffuser pipes to the Tennessee River. The daily flow volume from the diffuser pond on February 17 was 880 MGD. Therefore, we believe that the discharge had no adverse environmental effects on the Tennessee River.

Cause and period of the noncompliance--A 1.5 inch rainfall on February 17 contributed runoff from surrounding roadways and yard areas in amounts exceeding the capacity that the settling pond was intended to receive. In addition, a gradual buildup of sediment has reduced the

! settling capacity of the pond. As a result, efficient settling could not be achieved.

l Samples collected at 9:50 a.m. on February 10 and at 12 noon on February 19 contained total suspended solids concentrations of 15 mg/l and 35 mg/1, respectively. Therefore, the period of noncompliance was less than 10 days.

Steps taken to reduce, eliminate, and prevent recurrence of the noncomplying discharge--Runoff from areas surrounding the concrete batch plant, which is not directly affected by the batch plant activities, will be rerouted away from the settling pond. Also, sediments will be removed from the pond to increase the settling capacity. These sediments will be disposed of in an environmentally acceptable manner.

M 3

/"yMohamedT.El-Ashry,Ph.D.

Assistant Manager of Natural Resources (Environment) cc: (See page 2) Ib ,,

h00

'8 2 0 4 2 8 0 bch'5 b

An Equal Oppor tuni'.y Employer D

~b

/

APR 231982 -

Mr. James R. Patrick, Acting Chief cc: Tennessee Department of Public Health Division of Water Quality Control 150 Ninth Avenue, North '

TERRA Building Nashville, Tennesse,e 37203 /

\

Mr. Harold R. Denton. Director (5) i Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission 7920 Norfolk Avenue Washington, DC 20555 Mr. James P. O'Reilly, Director Office of Inspection and. Enforcement U.S. Nuclear Regulatory Commission, Region II 101 Marietta Street Atlanta, Georgia 30303 ,

Mr. Jack McCormick, Basin Manager Chattanooga Basin Office Division of Water Quality Control 2501 Milne Street Chattanooga, Tennessee 37406 i

e 9

i

~. _ . _ . _ _

_ . . _ - _ - . . . . -,. ., . , . . . _ _ _ . . . _ , _ , . - . _ _ . _ , . - , . . -- , .