ML20070M585

Submits Written follow-up Notification for Release of Ethylene Glycol on 940413.Caused by Technician Error.Pond Routinely Monitored for Adverse Environ Consequences & None Observed

ML20070M585
Person / Time
Site:	Catawba
Issue date:	04/22/1994
From:	Harris J DUKE POWER CO.
To:	Howell C, Mckinney S SOUTH CAROLINA, STATE OF, YORK COUNTY, SC
References
NUDOCS 9405020200
Download: ML20070M585 (3)

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, Duke Pourt Company (803)R313000 t Catawba Nudrar Statwn 4 W Concord Road nrk:sc 97 s 1

DUKE POWER April 22,1994 Stan M. McKinney, Chairman South Carolina Emergency Response Commission Division of Public Safety Program Rutledge Building Emergency Preparedness 1429 Senate Street Columbia, South Carolina 29201 Cotton Howell .

York County Emergency Preparedness Agency 155 Johnson Street P. O. Box 11706 Rock Hill, South Carolina 29731

Subject:

Catawba Nuclear Station Follow-up Release Notification - Ethylene Glycol Release File: CN-702.26, CN-707.04

Dear Sirs,

Pursuant to 40 CFR 355 (Emergency Planning and Notification), Duke Power Company hereby submits written follow-up notification for the release of Ethylene Glycol which occurred the evening of April 13,1994.

The Catawba Site contains a vehicle maintenance facility to service company operated cars, trucks, and equipment. Ethylene Glycol is stored in an underground storage tank in a concentrated form. As needed, this concentrated chemical is transferred into a smaller, above ground, mixing tank and diluted to the proper concentration for equipment use.

The mixing tank has a volume of one hundred (100) gallons.

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. Thiafternoon of April 13,1994 technicians in the garage area could not obtain an Ethylene Glycol supply flow from the mixing tank to the service bays. Thinking that the isolation valve from the mixing tank to the service bay was closed one of the technicians went to the mixing tank room and opened what was thought to be the isolation valve between the mixing tank and the service bays. The technician returned to the garage area.

Soon afterward it was realized that the dilution water inlet valve to the mixing tank had been opened rather the isolation valve.

An overfiow of approximately one hundred (100) gallons occurred to the mixing tank room. The floor drain in the mixing tank room was plugged and the spilled Ethylene Glycol exited the room through the entrance door located in the outside wall of the facility and traveled approximately fifty (50) feet to a nearby storm drain.

The storm drains in this area of the site connect to a drainage network which discharges into the Standby Nuclear Service Water Pond. This pond is considered to be public waters because of a piped overflow connection through the dam to Lake Wylie.

It is estimated that of the one hundred (100) gallons spilled, twenty five (25) gallons or less entered the pond. Approximately seventy five (75) gallons ofliquid were recovered and drummed along with several dmms of saturated cleanup debris. Samples obtained at .

the storm drain outfall, prior to mixing with the pond, indicated the Ethylene Glycol concentration to be 3480 mg/l. The pond was routinely monitored visually for indications of adverse environmental consequences and none have been observed.

As Ethylene Glycolis a CERCLA listed chemical (from part i12 of the Clean Air Act) with a statutory Reportable Quantity of one (1) pound notifications were made to the following agencies:

Agency Contaca Date Time South Carolina Emergency Response Com. mission Ms. Julie Lott 4/13/94 2040 York County Emergency Preparedness Mr. Jeff Turner 4/13/94 2025 National Response Center Ensign Gill 4/13/94 2033 (Report # 234-777) .

Nuclear Regulatory Commission Resident Rich Freudenberger 4/13/94 2025 An engineering review of the drainage routes for this area is being conducted along with implementation of necessary changes to operational methods to prevent a reoccurrence of this type event.

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Page 3 of 3 If y'ou should have any questions concerning this matter or need additional infonnation please contact either Cheryl Peed at 831-3361 or Tim Harris at 831-3656.

Sincerely, I i - ,

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J. Timothy Harris Scientist, Environmental Management xc: Mr. Al Williams, DHEC - Catawba District Mr. Lanny Robinson, DHEC - Catawba District United States Nuclear Regulatory Commission - Document Control Desk United States Nuclear Regulatory Commission - S. D. Ebneter United States Nuclear Regulatory Commission - R. E. Martin United States Nuclear Regulatory Commission - Rich Freudenberger i

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