RALEIGH – The North Carolina Department of Environmental Quality (DEQ) has received the required Comprehensive Site Assessment (CSA), submitted by Colonial Pipeline on Jan. 20, which provides an estimated volume of 1.2 million gallons of gasoline released from the August 14, 2020, spill in Mecklenburg County’s Oehler Nature Preserve near Huntersville’s town limits. Both the CSA and estimated volume released are under review by DEQ’s technical staff.