GW NTCRA Construction Completionby Nicole BarkasiJune 29, 2020December 10, 2020 GW NTCRA Construction Completion Posted June 29, 2020 Ex-Situ Groundwater USEPA Certification of Completion USEPA issued the Certification of Completion for the GW NTCRA on June 15, 2020. GW NTCRA Construction Completion Report USEPA approves the GW NTCRA Construction Completion Report submitted on May 29, 2020.