ML18153C744

Confirms 910911 Unusual Discharge During Final Stages of Dewatering of High Level Intake Screen Well to Allow for Maint Operations.Solids from Bottom of Well Were Pumped Over to Storm Drain Leading to Outfall 001

ML18153C744
Person / Time
Site:	Surry
Issue date:	09/16/1991
From:	Marshall B VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	Ronaldo Jenkins VIRGINIA, COMMONWEALTH OF
References
NUDOCS 9109240241
Download: ML18153C744 (2)

Text

fnmhrook Technical Center 5000 Dominion Boulemrd Glen Allen, VirRinia .23060 September 16, 1991 VIRGINIA POWER R.R. Jenkins, Jr.

Piedmont Regional Office Virginia Water Control Board P. o. Box 11143 Richmond, VA 23230 RE: SURRY POWER STATION - UNUSUAL DISCHARGE

Dear Mr. Jenkins:

This is to confirm the report of an unusual discharge which occurred at the Surry Power Station on September 11, 1991.

As observed by Mr. Steve Morris and Ms. Chris Garrett of your office during their inspection visit, during the final stages of dewatering of the Unit 2D high level intake screen well to allow for maintenance operations, solids from the bottom of the well were pumped over to the storm drain leading to Outfall 001 along with the river water from the well~ The solids involved were from settled silt from river water brought in through our intake canal and from biological growth which had been removed from the screen well and placed into a dump truck for dewatering.

Al though the procedures used - in this dewatering operation were admittedly inappropriate, we do not feel that this event should be cited as a violation. No pollutants were introduced to the station's discharge; the . solids discharged originated from the intake river water and under normal operations would have been -

discharged via the same point. No bypasses of treatment processes occurred; pumping from the screen well to the discharge canal merely bypassed our usual point of use of the river water. Also, there was no detrimental environmental impact; comparison of samples taken from the.intake and the discharge canals at the time of this event indicate that TSS in the impacted discharge (32 mg/1) was less than that in the river water being brought in at the intake (40.4 mg/1).

For future-operations of this nature, pumping of water from the wells to the discharge canal will be ceased prior to reaching the level of the settled solids. Solids will then be removed to a tank \

or a settling pond for dewatering and proper disposal without being discharged.

9109240241 910916 PDR ADOCK 05000281

~ PDR

e R.R. Jenkins, Jr.

September 16, 1991 Page 2 Should you need additional information or have any questions about this matter, please contact Daniel James at 273-2996.

Sincerely, B.

Manager Water Quality cc: U.S. NRC Docket 50-2<<il-Q/50-281 101 Marietta St., N.W.

Suite 2900 Atlanta, GA 30323 r U.S. NRC Attn: Docket Control Desk Docket No. 50-2*80/50-281 NRC Senior Resident Inspector Docket No. 50-2Bu/50-281 Surry Power Station