C - Hanford Site

RL--WH-C-NREACTOR-1991-103O WHC-SD-EN-TI-136, Rev. 0 Final Report
UNOFFICIAL COPY (Incomplete)
OCCURRENCE REPORT
16. OPERATING CONDITIONS OF FACILITY AT TIME OF OCCURRENCE
N-Reactor is in "Transition to Shutdown". The re-fueling station
has been deactivated and its storage tanks removed.
17. ACTIVITY CATEGORY
Shutdown
18. IMMEDIATE ACTIONS TAKEN AND RESULTS
Sampled the affected soil to determine what petroleum
product was present.
Removed petroleum saturated soil and placed in four 55
gallon hazardous waste drums, and placed said drums on the
163N less than 90-day storage pad.
19. DIRECT CAUSE:
3) Personnel Error
B. Inattention to Detail
20. CONTRIBUTING CAUSE(S)
21. ROOT CAUSE:
6) Management Problem
A. Inadequate Administrative Control
22. DESCRIPTION OF CAUSE:
From reconstructing the most likely cause of the
contaminated soil found during the removal of tank lOON-
SS-27, it was observed that the tank condition did not
indicate it to be a leaker.
There has been one reportable above ground spill at this
location in 1988. It is assumed there have also been other,
unreported, above ground spills at this re-fueling station.
The gravel and porous backfill surrounding the tanks creates
a natural pathway for surface spills, to the location where
the contaminated soil was found.
1993/02/02 page 3
C-13