Introduction: One sample was received from Prince William Sound Regional Citizens' Advisory Council for analysis of physical properties and simulated behavior testing.
Upon arrival, the sample was stored in a dark cold room at 2 degrees Celsius. Upon reception, the sample was weathered by rotary evaporation (see method of preparation below) to form simulated evaporatively weathered oils without chemical oxidation. The percentage of mass lost by evaporation was monitored. Table 1 summarizes the original sample and the three evaporatively weathered fractions which were prepared.