RBG-30513, NPDES Noncompliance:On 890406,effluent Limitations for Total Residual Chlorine in Outfall 004 Exceeded Permit Limits. Caused by Inability to Adjust Chlorine Dosage within Fluctuating Flow & Oxidant Demand

NPDES Noncompliance:On 890406,effluent Limitations for Total Residual Chlorine in Outfall 004 Exceeded Permit Limits. Caused by Inability to Adjust Chlorine Dosage within Fluctuating Flow & Oxidant Demand

ML20244B417
Person / Time
Site:	River Bend
Issue date:	04/11/1989
From:	Booker J GULF STATES UTILITIES CO.
To:	Oneill M LOUISIANA, STATE OF
References
RBG-30513, NUDOCS 8904190186
Download: ML20244B417 (2)

Text

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es GULF STATES UTILITIES COMPANY P O S T O F F IC E D o X 2 9 51 *DEAUMONT. TEXAS 77704 AREACODEdo9 838 6631 April 11, 1989 RBG- 30513 File Nos. G1,11.2 Ms. Maureen'0'Neill, Assistant Secretary i Office of Water Resources s LA Department of Environmental Quality 4-Post Office Box 44091, Capitol Station ,

Baton Rouge, LA 70804-4091

Dear Ms. O'Neill:

Water Discharge Permit No. WP0409 River Bend Station - Unit 1 ,

. This is to inform you of a noncompliance with Water Discharge Permit No.

WP0409 for Outfall 004, treated sanitary wastewater from power station to f Grants Bayou. The effluent limitations for total residual chlorine (TRC) in l the outfall are a minimum of 0.8 mg/l and a maximum of 2.0 mg/1. A ' sample collected at 1048 hours0.0121 days <br />0.291 hours <br />0.00173 weeks <br />3.98764e-4 months <br /> on Aprij 6, 1989 contained 0.7 mg/l TRC. When the low TRC level was noted, immediate a'djustments of the calcium hypochlorite dose rates were made to obtain an effluent within the allowable range. Samples taken later on April 6, and again on each of the succeeding three days,

, indicated TRC concentrations of 0.9 - 1.9 mg/1.

, The cause of this excursion was an inability to adjust chlorine dosage with

- effluent of fluctuating flow and oxidant demand, as well as variability in the j quality of hypochlorite tablets. Similar problems were encountered last autumn and last month, the most recent of which was reported in a letter dated 1

March 21, 1989. As noted in a letter dated March 14, 1989, we have hired consulting engineers to provide recommendations f>r a long-term so3ution to the problem of reliable disinfection at Outfall 004. Preliminary results of these studies are now expected before the end of April,1989.

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 properly 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 submitted, the information submitted is, to the best of my l

knowledge and belief, true, accurate and complete. I am aware that there are i significant penalties for submitting false information, including tha possibility of fine and imprisonment for knowing violations.

l l Sincerely, 8904190186 890411 '

• PDR ADOCK 05000458 S PDC

". E. Booker /,

Manager-River Bend Oversight River Bend Nuclear Group I &

i JEB/LAE/JWC/JVC/ch

=

cc: Mr. Myron Knudson, Director Water Management Division (6W)

U.S. Environmental Protection Agency, Region VI Allied Bank Tower 1445 Ross Avenue Dallas,"TX 75202-2733 Capitol Regional Office s-Water Pollution Control Division

• 11720 Airline Highway Baton Rouge, LA 70817-1720

/ .S.

U Nuclear Regulatory Commission Document Control Desk '

Washington, D.C. 20555 U.S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 1000 Arlington, TX 76011 -

, NRC Resident Inspector Post Office Box 1051 St. Francisville, LA 70775 l

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