Figure 4. Summary of the peak oil concentrantions in the water column at 1-5m depth below the oil which had been sprayed with dispersant. Before dispersant application ＜2 ppm concentrations of dispersed oil were restricted to the top 1m of the water column.Following treatment with dispersant 1-10 ppm level oil concentrations were seen to penetrate down to 5m indicating a successful dispersant operation.
＞5ppm； 1-5ppm； ＜1ppm
