An inspection by the USCG and vessel's crew
has identified the source of the sheen
that appeared earlier today during the loading
and deballasting of the tank vessel S/R Benicia
at berth 5 of the Valdez marine terminal.
Internal inspection of the vessel
revealed a 3-4 inch fracture along a bulkhead
that separates the No 5 Port cargo tank
from the No 4 Port Segregated Ballst tank,
The estimated spill volume of 10 gallons was
the result of the oil leaking from the crude tank
into the ballast tank
and being discharged with the ballast water
during deballasting operations
casuing the sheen to appear.