Environmental variability can not be determined from the plastic 

 bag data. However, circumstances in the sample area (for the two glass 

 jar samples) would lead one to expect a fair degree of homogeneity. The 

 bay was small, enclosed, and shallow; the wind was directly into the 

 entrance of the bay, therefore trapping the oil and providing an un- 

 changing source (except for weathering). Also, the oil was in a stable, 

 emulsified form, and mixing was low and uniform (no areas of high wave 

 action or turbulence). There was time and the proper circumstances for 

 factors to progress toward equilibrium. It is therefore consistent 

 that, even with an hour between sampling times, the two concentration 

 values were very close together. 



If these numbers are to be useful, it is important to note the 

 environmental conditions under which they were produced. The samples 

 were taken in the afternoon of the day after oil had first reached the 

 site. The trajectory of the oil can be inferred from observations of 

 the time that oil reached various shores (section 1.2 and Fig. 4.9) and 

 from wind data (currents were minimal and tides were absent, so that 

 trajectories were primarily wind driven). As recorded by SOR Team 

 personnel, on board the research vessel Aurelia, the wind on the day of 

 sampling (11/1/77) was steady at 10 m/s from 165 T all morning. In the 

 afternoon the wind increased to 12-14 m/s but did not change direction. 

 Throughout the previous day (10/31/77) the wind was steady from 180* T at 

 10-15 m/s. With such winds, it was virtually impossible for the site to 

 receive fresh oil from the Tsesis , but rather the oil was that which had 

 previously blown against the rocky shores of Liso Island. This deduction 

 agrees with observations made by the Swedish scientists on 10/27, 10/30, 

 and 11/1 (Fig. 4.9). Therefore, the oil had weathered between two and 

 five days, traveled a total distance of about 10 km, and had been trapped 

 for a while enroute, interacting with a rocky shore. 



Surface oil chemistry data (section 5.2) indicates that the Tsesis 

 oil emulsified very rapidly, and all oil samples taken away from the 

 immediate vicinity of the ship were close to fully emulsified. It is 

 therefore quite certain that the oil in the bay when Notini's samples 

 were taken was "mousse" containing about 75% water. 



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