ML20072C505

Requests Mod to Wpdes Permit WI-0000957-2,removing Ph Limitations on Sewage Treatment Plant & Retention Pond Effluents.Mod Will Allow Operation of Plant & Pond W/Reduced Additions of Dissolved Solids to Environ

ML20072C505
Person / Time
Site:	Point Beach
Issue date:	06/16/1983
From:	Lingle J WISCONSIN ELECTRIC POWER CO.
To:	WISCONSIN, STATE OF
References
NUDOCS 8306210091
Download: ML20072C505 (3)

Text

O lHeconsm Electnc mia come 231 W. MICHIGAN, P.O. BOX 2046, MILWAUKEE, WI 53201 June 16, 1983 STATE OF WISCONSIN Department of Natural Resources WPDES Permit Section P.O. Box 7921 Madison, Wisconsin 53707 Gentlemen:

C WPDES Permit No. WI-0000957-2 POINT BEACH NUCLEAR PLANT Wisconsin Electric Power Company hereby requests a modification of the WPDES permit for the Point Beach Nuclear Plant. The Company re-I quests that the pH limitations on the sewage treatment plant (sample point 401) and the retention pond (sample point 501) effluents be removed from the above WPDES permit. The removal of the permit limits will allow op-eration of the sewage treatment plant and retention pond with reduced p additions of dissolved solids to the environment.

Without final chemical adjustment, the effluent of the sewage treatment plant has a pH of 5.8 to 6.3 (s.u.). In order to meet the minimum pH limitation of 6.0, it is often necessary to add sodium hydrox-ide to the sewage treatment plant effluent. Since the sewage treatment plant effluent is routed directly to the retention p'ond, pH adjustment at this point is not necessary.

Wastewater from the makeup water treatment system, which is also routed to the retention pond, raises the pH of the retention pond. During the first four months of 1983, we have had six incidents of retention pond effluent pH that exceeded the maximum limitation of 9.0 (s.u.). On these occasions, it was necessary to add sulfuric acid to the retention pond in order to reduce the effluent pH to below 9.0 (s.u.).

The combined wastewaters from the retention pond are routed to one of the two once-through cooling water discharges (outfalls 001 and 002).

The ratio of the average cooling water discharge flow to the average re-tention pond flow is approximately 7800:1. The cooling water provides adequate buffering capacity to neutralize the slightly excessive alkaline conditions of the retention pond effluent. The addition of retentien pond effluent has minimal effect on the pH of the cooling water discharge, even 3 in the event that retention pond effluent is outside the permit limitations, se

'Since it is the discharge from the outfall that enter the environment, it is reasonable to have pH limits only on the discharge at the outfall.

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We are submitting this modification request at this time so that it may be considered during the reissuing process for the WPDES permit.

If you have any questions regarding this request, please contact me.

Sincerely,

% M doned by J. W. Lirmfe James W. Lingle Superintendent Chemical Services Division Environmental Department cc: DNR Lake Michigan District C Region III C C Washington, D.C.

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