C - Hanford Site

CONTRACTOR : WHC
WHC-SD-EN-TI-136, Rev. 0 Page 1 of 2
EV ENT FACT SHEET
1. Title: Leaking UST
2. Reporting Organization: Decomissioning Engineering
3. Division/Department/Project: Environmental/Hanford Restorati on Oper.
4. Number: D&D/100-O1-90 5. Rev.: 0
6. Date of Event/Time: 6/21/90, 2:00pm Date Discovered: 6/21/90
7. Event Identification:
A) Location of Event: 100-N Service Station (Tank 100-N-SS-27)
B) Plant/Faci'lity Status: Station was out-of-service for testing
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1. Alarm: Facility Type 5. Radiological - Personnel
(False Fire, CAM, CAS, etc.) Contamination, Internal
Z. Regulatory Requirement Deposition, Over Exposure, etc.
(CERCLA, RCRA, WDOE, DOE-RL, 6. Industrial Safety, Personnel
DOE-HQ, etc.) Injury, First Aid, etc.
3. Operating Requirements (OSR, 7. Process Misrouting
CPS, Tech Spec., Procedure 8. Utility System - Electrical,
Administrative, etc.) Steam, Air, Water
4. Release/Spread'- Radioactive 9. Hoisting/Lifting
Contamination/Hazardous 10. Other
Material
C) Event Type: 2 (4OCFR28O.43 [C])
OSR/TS: Nonconformance f)Violation f
CPS: Infraction [3 Violation [
8. Apparent Cause(s) of Event:
Design [3Administrative Control []
Personnel Error [3Procedure [
Material t)Other: [X] Tank age
9. Descriiotion of Event:
While preparing for routine UST Tightness Testing, the 100-N-SS-27 tank
was determined to have a leak. The leak is in the top 10% of the t 'ank
volume (probably at the fill pipe to tank connection) as evidenced by
satisfactory inventory control data for this tank (less than 1%
discrepancy on the last 6 to 12 months). The total release of unleaded
gasoline is estimated at less t han 5 gallons occurring between 6/20/90
(tank fill for testing) and 6/21/90 (discovery of leak).
10. Consequences of Event:
Small release of unleaded gasoline (less than 5 gallons)
A-7400-329 (3/90) (EF) WEFOO5
Event Fact Sheet
C- 18