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At-sea field tests were completed in the summer of 2003 in the UK and in
the fall of 2003 at Ohmsett to determine the dispersibility of IFO 180 and
IFO 380 fuel oils acquired from a refinery in the UK. Additional dispersant
effectiveness testing on these oils using small and mid-scale test methods
has been completed by other agencies including MMS, the Canadian Department
of Fisheries and Oceans and CEDRE in France. The U.S. EPA through its
on-site contractor the University of Cincinnati conducts standardized
laboratory dispersant effectiveness and toxicity testing to determine if
these products meet the criteria to be listed on the National Product
Schedule. In FY-2004, MMS funded the U.S. EPA (TAR
research project 513) and their on-site contractor, the University
of Cincinnati, to conduct laboratory effectiveness testing using two test
protocols the BFT and the and SWT with three dispersants (Corexit 9500,
SuperDispersant 25 and Agma DR 379), two oils (IFO-180 and IFO-380) at one
Dispersant to Oil Ratio (DOR 1:25) at one temperature (16oC). This amounts
to twelve experiments (each with four replicated) for a total of 48
dispersant effectiveness experiments. Results from this project were used to
prepare scientific papers for the 2005 International Oil Spill Conference.
However during peer review data gaps were identified that need to be filled
in order to get a more complete correlation between laboratory testing,
small and large wave tank testing and at-sea field trials. The proposed
research will address these data gaps.
This project was an Interagency Agreement (IA) equally co-funded by the
U.S. EPA and MMS. The primary objective of this research project was for the
U.S. EPA and their on-site contractor the University of Cincinnati to
conduct standardized laboratory dispersant effectiveness testing to
determine if the Baffled Flask Test (BFT) was able to predict chemical
dispersion effectiveness of oil spills similar to what was experienced in
the field during the UK at-sea trials and at Ohmsett -The National Oil Spill
Response Test Facility.
The secondary objective was to determine how closely results from the BFT
match with results obtained in the field during the UK at-sea trials and at
Ohmsett. |
