Table 3-2. Gas chromatograph conditions used by J. Quinn, URI 



Condition 



Specification 



Column 



Temperature program 

 Chart speed 

 Detector temperature 

 Injection port temperature 

 Range and attenuation 

 Amount injected 



4% FFAP, 2 m X 2.2 mm inner diameter, 

 stainless steel. 



75°C to 250°C at 8°C/min and hold. 



0.25 in./min. 



300°C. 



250°C. 



4 X 102. 



2 to 3/ul. 



Figures 3-1 and 3-2 for Milgram's two samples. The cargo sample is repre- 

 sented in Figure 3-1, and Figure 3-2 represents the slick sample obtained on 

 December 19 within 1 mile of the Avgo Merchant. The presence of C^o-Cie 

 n-alkanes in the two samples corroborates Milgram' s analysis of 20% light 

 fuel oil in the cargo, and is consistent with the results obtained by R. 

 Jadamec of the USCG Research and Development Center, which are discussed in 

 the next section. 



3.2.2 Water Sampling and Analyses 



Samples 



Water samples obtained after the Avgo Merchant grounding included the 

 first taken during the WHOI R/V Ooeanus II cruise on December 20 and 21 and 

 those obtained on the cruise of the URI R/V Endeavor, February 8-12. Other 

 vessels involved in water sampling were the USCGC's Evergreen, Vigilant, 

 Bittersweet, and NCAA's Belawojce II. The sampling locations are plotted in 

 Figure 3-3; further details are given in Appendix V. 



By far the largest number of samples were taken with Sterile Bag Samp- 

 lers (Model 1030, General Oceanics, Inc., Miami, Florida). This sampler is 

 designed to be lowered through the sea-air interface while sealed, opened by 

 messenger at depth, and automatically closing before being returned to the 

 surface. The sample of approximately 1 liter thus obtained is uncontaminated 

 by a surface oil slick, and is representative of the subsurface water. In 

 areas thought to be uncontaminated, additional samples were taken with stan- 

 dard Niskin bottles of the type that passes through the air-sea interface in 

 an "open" configuration and is closed at depth by a messenger. 



72 



