ML20055C080
| ML20055C080 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 08/05/1982 |
| From: | Elashry M TENNESSEE VALLEY AUTHORITY |
| To: | Marlar J ENVIRONMENTAL PROTECTION AGENCY |
| References | |
| NUDOCS 8208100209 | |
| Download: ML20055C080 (3) | |
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. TENNESSEE VALLEY AUlHomTY KNOXVIL L E. f t.NNESSLI 3 /W)2 TVA Mallroom Auu 0 51982 Mr. John Marlar, Chief Facilities Performance Branch Water Management Division U.S. Environmental Protection Agency, Region IV 345 Courtland Street, NE.
Atlanta, Georgia 30365
Dear Mr. Marlar:
NOTIFICATION OF NONCOMPLIANCE WITil EFFLUENT LIMITATIONS - NPDES PERMIT NO. TN0026450 - SEQUOYAH NUCLEAR PLANT Description of the discharge--Discharge No. 007 - Yard drainage pond effluent to the diffuser pond (DSN 024). Three samples collected on July 21, 1982 at 7:00 a.m., 8:48 a.m., and 4:00 p.m. centained oil and grease concentrations of 45 mg/L, 36 mg/L, and 38 mg/L, respectively, exceeding the daily maximum permit limitation of 20 mg/L. The flow rate for July 21 was 3.0 mgd.
Cause and period of the noncompliance--A contractor removing oil from the turbine building waste oil sump allowed his tanker to overflow, resulting in an estimated 300-400 gallons of waste oil reaching the plant yard drainage system.
Samples collected on July 14, 1982 at noon and on July 21, 1982 at 8 p.m.
contained oil and grease concentrations of less than 5 mg/L. The maximum period of noncompliance was less than 8 days. We believe that a more accurate estimate would be 13 hours1.50463e-4 days <br />0.00361 hours <br />2.149471e-5 weeks <br />4.9465e-6 months <br />.
Steps taken to reduce, eliminate, and prevent recurrence of the noncomplying discharge--To reduce and eliminate the noncomplying discharge, oil absorbent pillows and an oil absorbent boom were deployed within the yard drainage lines and in the yard pond, respectively.
Sampling of the yard pond influent and effluent was initiated at an increased frequency and at the same time oil and grease samples from the diffuser discharge to the Tennessee River (DSN 024) were taken.
From 7 a.m. on July 21 until 4 a.m. on July 22, the maximum value observed for oil and grease from DSN 024 was 11 mg/L.
During this time period, there was no visible sheen on the surface of the diffuser pond. Table I illustrates the sampling program employed and its results during this event. Also, in an effort to eliminate a continuing or recurring noncompliance from this event, the contaminated dirt and gravel surrounding the contractor's tanker were removed and disposed of in a manner that will prevent entrance of the absorbed oil into the waters of the United States.
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BY 8208100209 820805 PDR ADOCK 05000327 PDR S
, u gg g
, Mr. John Marlar, Chief AUG 0 51982 We are investigating corrective measures that include containment facilitics'and/or administrative contro' to, event recurrence of this type of release in the future. The corrective measures employed.will be incorporated into the Sequoyah Spill Prevention. Control and Countermeasures Plan.
Sincerely, Original Signed By, M. T. El-Ashry Mohamed T. El-Ashry, Ph.D.
Assistant Manager of Natural Resources (Environment)
Enclosure cc (Enclosure):
Tennessee Department of Public Ilealth Division of Water Quality Control 150 Ninth Avenue, North TERRA Building Nashville, Tennessee 37203 Mr. liarold R. Denton Director (5)
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 l
U.S. Nuclear Regulatory Commission Region II 101 Marietta Street Atlanta, Georgia 30303 i
Mr. Jack R. - McCormick, Basin Manager i
Chattanooga Basin Office Division of Water Quality Control 2501 Milne Street Chattanooga, Tennessee 37406
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TAllLE I Oil 6 Grease Conc.
Oil & Grease Conc.
Yard pond (mg/L)
Dif fuser Pond (mg/L)
Time inlet Outlet Outlet 1:45 a.m.
90.7 5.8 5:00 a.m.
88.9 7:00 a.m.
76 45 8
8:48 a.m.
10 36 5*
11:00 a.m.
5*
5*
5*
1:00 p.m.
5*
5*
5*
4:00 p.m.
5*
38 11 8:00 p.m.
5*
5*
5*
12:05 a.m.
5*
5*
5*
4:00 a.m.
5*
5*
5*
NOTE:
- Denotes less tlian value