After the hose is lowered to the desired depth, continuous monitoring is conducted. First, the team collects background data in an area not impacted by the oil spill. Then, the team collects data under part of the slick not treated with dispersant, to ascertain natural dispersing of the oil. Last, the team collects data under the dispersant-treated slick. Increase in fluorometer readings in the treated area is an indication that the dispersants are effective, and dispersant use may be continued.

Monitoring for Dispersed Oil The boat moves across the area treated with dispersant, while monitoring continuously under the slick for dispersed oil.

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Revised: July 17, 2001
Office of Response and Restoration, National Ocean Service, National Oceanic and Atmospheric Administration