This Emergency Administrative Order is issued to named Respondents who contaminated groundwater in and around the East Poplar Oil Field from their past practices managing produced brine in unlined pits, varous spills of produced brine and crude oil, and from produced brine and crude oil leaking at Respondent Pioneer's improperly plugged oil well. Every estimate of the movement of the East Poplar Oil Field groundwater contamination plume(s) has concluded that such plumes will reach the City of Poplar's public water system.