USS Wenonah; Treasure Island, San Francisco Bay, CA

Treasure Island, San Francisco Bay, CA | 2009-Aug-17

Initial Notification: In the early afternoon of 17AUG2009, CA's Office of Spill Prevention & Response personnel notified the regional NOAA SSC of a diesel & waste oil release from a partially-sunken tugboat on the East side of Treasure Island in Central San Francisco Bay, CA causing an initial sheen of 200’x200’. No NOAA support was requested. By mid-afternoon, the vessel was surrounded by containment boom, no more sheen had been observed outside the boom and plans were being prepared to raise the vessel and remove the remaining fuel. The vessel’s maximum capacity was estimated at 10,000 gallons though on-scene observations indicated that she was probably carrying far less than that and 100-500 gallons may have been released. Sector San Francisco then contacted the NOAA SSC on 18AUG2009 stating that the vessel was continuing to release sheen and requested estimates of oil fate and extent.