F76 50/50F76/Algal HRD Algal HRD Surface Tension (dyn/cm) Interfacial Tension with KWSW (dyn/cm) Surface Tension (dyn/cm) Interfacial Tension with KWSW (dyn/cm) Surface Tension (dyn/cm) Interfacial Tension with KWSW(dyn/cm) Neat(Unexposed) 28.2 ± 0.1 10.7 ± 0.4 26.8 ± 0.2 13.0 ± 0.6 26.0 ± 0.1 34.6 ± 1.0 Control(KWSW/BH*) 26.7 ± 0.3 13.5 ± 0.1 25.8 ± 0.1 16.7 ± 0.2 25.2 ± 0.2 37.1 ± 0.3 Sea Microbes 26.7 ± 0.2 12.3 ± 0.2 25.7 ± 0.1 18.1 ± 0.2 25.1 ± 0.2 33.0 ± 1.5

*Error is one standard deviation.*Control sample contains the same media as sea microbe sample (50/50 Key West seawater/Bushnell Haas media), but is sterile and has not been inoculated with sea microbes.

Table 5: Surface and Interfacial Tension of Fuels before and after Microbial Exposure.