within these plans, duke energy is responsible for creating and implementing a site assessment that includes but is not limited to ecological analysis, surface water and sediment assessment as well as post-removal monitoring protocols to calculate the extent of pollution in the dan river in north carolina and the kerr reservoir and schoolfield dam in danville, virginia. these assessments were approved by the epa in consultation with the affected state agencies including ncdeq and the virginia department of environmental quality (vdeq). following the spill and written into the aoc are monitoring protocols in which epa will sporadically authorize the ncdeq and vdeq to take split or duplicate water samples to ensure consistent quality after removal of the coal ash.