Back to the fuel spill. Certainly is a frightening situation, and glad that no one was injured. We always keep at least a 1/4 square of an oil absorb pad in one hand when fueling (usually held just below the tank vent) to catch any fuel.
From Environmental Protection--condensed to some degree:
Dispersing Agents
Dispersing agents, also called dispersants, are chemicals that contain surfactants and/or solvent compounds that act to break petroleum oil into small droplets. In an oil spill, these droplets disperse into the water column where they are subjected to natural processes, such as waves and currents, that help to break them down further. This helps to clear oil from the water's surface, making it less likely that the oil slick will reach the shoreline.
Heavy crude oils do not disperse as well as light to medium weight oils. Dispersants should not be used on gasoline or diesel spills for example. Dispersants are most effective when applied immediately following a spill, before the lightest materials in the oil have evaporated, however, dispersant manufacturers have claimed that the "window-of-opportunity" to apply dispersants effectively is widening.
EPA policy does not allow the use of dispersants in freshwater unless authorized by an On-Scene Coordinator to protect human health.... However, dispersants have not been used extensively in the United States because of possible long term environmental effects, difficulties with timely and effective application, disagreement among scientists and research data about their environmental effects, effectiveness, and toxicity concerns.
long term cumulative effects of dispersant use are still unknown.
It’s also illegal for marina operators or boaters to “treat” a
sheen by putting anything on it that will disperse, emulsify or
coagulate it. This includes detergents. Current USCG penalties
for spilling, or not reporting, or “treating” a sheen go up to
$32,500. Even if you are not on waters with USCG jurisdiction,
you are subject to a similar state law. If a fuel dock or marine can hold more than 1300 gallons of fuel, they are required to have a fuel spill response kit to absorb the fuel.
The detergent takes the microdrops of fuel to the bottom and it contaminates the benthos which is at the bottom of the bay floor. It does not necessarilly get rid of the risks of explosion.