The COT-ES monitors groundwater semi-annually at the Vincent Mullins Landfill in accordance with an Aquifer Protection Permit (APP) issued by ADEQ in January 2002 (Location Map ). The APP required ongoing groundwater monitoring, capping the landfill and upgrading the land fill gas extraction system. Per APP requirements the landfill was officially closed in November 2007. Semi annual groundwater monitoring and quarterly landfill gas monitoring at the property boundaries is on-going.
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