Table 3. Weight Changes During Weathering 



Fuel 

 Oil^ 



Original 

 Oil (gm) 



Weathered Oil (gm) 



Percentage 

 Recovered 



Syphoned 



Extracted 



Total 



A 



268.8 



175.8 



41.3 



217.1 



80.0 



B 



277.7 



142.1 



68.2 



210.3 



75.7 



C 



280.8 



183.9 



69.2 



253.1 



90.1 



D 



278.4 



115.9 



99.7 



215.6 



77.4 



D^ 



281.7 



198.6 



47.2 



245.8 



87.2 



C^ 



285.9 



158.0 



55.4 



213.4 



74.7 



E 



317.4 



159.6^ 



132.3 



291.9 



92.0 



X = Weathering without wind. 



y = Preliminary 6 -week experiment. 



Separated by decanting. 



The areas of the curves were measured with a disc integrator. 

 The total areas and the areas above a boiling point of 298°C are 

 shown in Table 4; also shown are the calculated portions remaining 

 after weathering and the percentages of oils recovered as given in 

 Table 3. 



The viscosities of the oils were determined with a Zeitfuchs 

 Cross-Arm viscometer held in a bath at 22.2°C (72°F) . For the distillate 

 fuels a Number 2 viscometer was used. For the NSFO a Number 4 viscometer 

 was used. The viscosity changes are shown in Table 5. 



Total organic carbon analyses of the salt water extracts were 

 made. The values obtained for the aqueous layers from the weathering 

 of the oils are shown in Table 6. 



DISCUSSION 



General Considerations 



Many factors will affect the fate of fuel oil spilled on the 

 open sea: wind; agitation; temperature; sunlight; micro-organisms; 

 presence of foreign matter; and, of course, the composition of the 



