Mystery sheen, San Pedro Channel, Off Los Angeles, CA

In the early afternoon of 23-August-2012, USCG Sector Los Angeles/Long Beach contacted their NOAA SSC to request support for a mystery sheen reported earlier in the day. A sheen from an unknown source was observed and reported to the USCG at approximately 0700 hours (local) at 33º 30.09’N, 118º 07.08’W. A subsequent USCG overflight at approximately 1030 hours (local) observed a heavy sheen covering approximately 1 square mile. A trajectory estimate was requested.