ML20040G781

Ro:On 820128,sample Collected on Svc Bldg Sump Discharge Exceeded Limitations of NPDES Permit TN0026450.Caused by Failure to Clean Sump Routinely Due to Plant Workload.Sump Cleaned

ML20040G781
Person / Time
Site:	Sequoyah
Issue date:	02/09/1982
From:	Elashry M TENNESSEE VALLEY AUTHORITY
To:	Patrick J ENVIRONMENTAL PROTECTION AGENCY
References
NUDOCS 8202160459
Download: ML20040G781 (2)

Text

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TENNESSEE VALLEY AUTHORITY m

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KNOXVILLC. TENNES!EE 37:02 4

126 Locust Street Building p

q FEBD 1982 RECENED Mr. James R. Patrick, Chief 2]

FEB1'819825 =8 Water Permit Branch, Water Management Diviston

- Nem % p U 4. Environmental Protection Agency, Region IV suwm p Id*

8 345 Courtland Street, NE.

Atlanta, Georgia 30308 g

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Dear Mr. Patrick:

NOTIFICATION OF NONCOMPLIANCE WITl! EFFLUENT LIMITATIONS - NPDES PERMIT NO. TN0026450 - SEQUOYAll NUCLEAR PLANT Description of the discharge--Discharge No. 019 - Service building sump.

A sample collected at 1 p.m. on January 28, 1982 exceeded maximum permit limitations as shown below:

Parameter Concentration Maximum Limitation Oil and grease 28 mg/L 20 mg/L Total suspended solids 150 mg/L 100 mg/L Cause and period of the noncompliance--Under normal low flow conditions solids settle and accumulate below the suction intake for the pumps of this large capacity sump.

To preclude a buildup of solids resulting in a release in excess of the permit limitation, this sump is routinely cleaned on a weekly basis.

The material removed is disposed of in a lined chemical treatment pond.

During the time of the noncompliance, the workload at the plant prevented routine cleaning of the sump. The solids accumulated to the point where they were discharged by the sump pump, which resutled in the noncompliance.

A sample collected at I p.m. on January 25 contained a total suspended solids concentration of 66.4 mg/L and an oil and grease concentration of less than 5 mg/L.

The noncompliance noted on January 28 ended when the sump was cleaned on February 1.

The period of noncompliance, therefore, was less than seven days. A sample collected at 8:45 a.m. on February I contained 67.4 mg/L of total suspended solids and less than 5 mg/L of oil and grease verifying the end of the noncompliance.

Steps taken to reduce, eliminate, and prevent recurrence of the noncomplying discharge--The sump was cleaned on February 1 to end the noncompliance.

Plans to modify the sump are being prepared to prevent the accumulation of solids and possible future violations of the NPDES permit limitations.

Sincerely, q

Mohamed.gM*ftsNfy, Ph.D.

iF Assistant Manager of Natural Resources (Environment) y f0 cc: See page 2.

$ rip 8202160459 820209 An Equal Opportunity Employer j

PDR ADOCK 05000327 S

PDR

o Mr. James R. Patrick, Chief FEBD 1982 cc: Tennessee Department of Public Health Division of Water Quality' Control 150 Ninth Avenue, North TERRA Building Nashville, Tennessee 37219-

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_Nr. Harold R. Denton, Director -(5)

Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission 7920 Norfolk Avenue Washington, DC 20555 Mr. James P. 0'Reilly, Director Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Region II 101 Marietta Street Atlanta, Georgia 30303 Ur. Jack McCormick,-Chief Southeast-Regional Health Office Division of Water Quality Control 2501 Milne Street Chattanooga, Tennessee 37406 a

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