Sheen Surveillance: an Environmental Monitoring Program Subsequent to the 1989 Exxon Valdez Shoreline Cleanup

摘要: In the fall of 1989, an aerial surveillance program was implemented to locate oil sheens (or slicks) originating from shorelines affected by Exxon Valdez spill. The objectives were identify any on water that warranted response and those sections shoreline would be priority candidates for further cleanup in 1990. initially surveyed entire area, but, because proportionally fewer spotted Gulf Alaska, refocused Prince Williams Sound early consisted frequent low-altitude flights with trained observers a deHavilland Twin otter outfitted observation ports communication equipment. primary technique used direct visual observation. Other techniques, including photography, tested but proved less effective. targeted all concern, particularly near fishing, subsistence, recreational areas.the attempted sheens, estimate their size color, ad source found sheen. Size color volume each Samples collected whenever possible during summer 1990 using floating Teflon{trademark} sampling device thatmore » developed easy deployment boat or pontoon float plane. Forty four samples analyzed UV-fluorescence spectroscopy. Eleven these also GC/MS. general, analyses confirmed observers` judgment source. 16 refs., 9 figs., 2 tabs.« less