ML17101A363

Tmsp Permit No. TNR050015, Sector O - Exceedance of Benchmark Monitoring Requirement

ML17101A363
Person / Time
Site:	Sequoyah
Issue date:	04/07/2017
From:	Anthony Williams Tennessee Valley Authority
To:	Innes J Office of Nuclear Reactor Regulation, State of TN, Dept of Environment & Conservation
References
TNR050015
Download: ML17101A363 (2)

Text

Tennessee VaUey Authority, Post Office Box 2000, Soddy Daisy, Tennessee 37384-2000 April 7, 2017 Ms. Jennifer Innes Tennessee Department of Environment and Conservation Division of Water Pollution Control*

1301 Riverfront Parkway Chattanooga, Tennessee 37402

Dear Ms. Innes:

TENNESSEE VALLEY AUTHORITY (TVA)-SEQUOYAH NUCLEAR PLANT (SQN)-TMSP PERMIT NO. TNR050015, SECTOR 0- EXCEEDANCE OF BENCHMARK MONITORING REQUIREMENT This letter serves as the 30- and 60-day notification of an exceedance of the benchmark monitoring requirement for total recoverable iron. Storm Water Outfall 6 was sampled during a qualifying event on March 7, 2017, resulting in an iron value of 5.820, which exceeds the benchmark value of 5.0.

The analytical results are summarized in the table below.

Table 1. Total Recoverable Iron Results Sample Storm Water Analytical Benchmark Sample Analysis Outfall Results Monitoring Date Received Number (mg/L) Requirement (mg/L)

Date 6 3/7/17 3/15/17 5.8 5 30-Day Requirement Per the permit requirement, the area surrounding Outfall 6 was inspected to determine the likely cause of the exceedance .. Upon examination, it is believed that the cause of the exceedance is possibly due to 55-gallon drums stored in the Empty Drum Storage Area located near the flow path of the outfall.

60-Day Requirement The SWPPP has been reviewed for any changes to Drainage Area 4, which includes Outfall 6. The Empty Drum Yard Storage area will be added to Drainage Area 4 as an area for potential iron run-off. The use of heavy metal adsorbent socks along the flow path to Outfall 6 will be added to the BMPs for that area. Modifications to the SWPPP will be completed by May 5, 2017. Please contact Millicent Garland by email at mrmoore@tva.gov or by phone at (423) 843-6714.

I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel property gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations.

Sincerely, fl--- -f~" I"")-

Anthony L. Williams

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Site Vice President Sequoyah Nuclear Plant Enclosures cc (Enclosures):

U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555