The method is simple, easy to scale-up, and with no use of organic dispersant or surface capping agent.
It was not clear how the environmental agency would enforce the demand that BP reduce its use of the dispersant.
Not surprisingly, BP Chief Executive Bob Dudley defended use of the dispersant.
Overnight on Friday, crews dumped 3,000 gallons of sub-surface dispersant at a rate of nine gallons per minute.
Another aspect of this spill that's unusual is the widespread use of chemical dispersants, applied both at the source and on the surface.
The moratorium increases the burden on the state.Some witnesses expressed concern over the use of dispersant chemicals.
However, widespread use of dispersant during the clean-up effort continues to help those chemicals persist.
The BP oil disaster clean-up has involved an unprecedented volume of use of dispersant chemicals.
Is this related to the spill or the use of chemical dispersants being used to clean up the area?
Instead, the heavy use of oil dispersants during and after the blowout meant that the oil was patchily distributed.
