LOCATION: Liberty Lake, WA 99019
CURRENT STATUS: Closed and under going Clean-up Action, last Ecology Five Year Review occurred in 2013.
CLEAN-UP ACTION COMPONENTS
||Ownership of Greenacres Township Municipal Dump given to Spokane County
||Ecology detected groundwater contamination in well adjacent to landfill site
||Landfill site nominated for Superfund eligibility
||EPA placed landfill site on National Priorities List (NPL)
||Remedial Investigation of site
||Feasibility Study completed
||Enforcement Order given to monitor groundwater at site for three years
||Consent Decree signed by Spokane County to implement a clean-up action
||Landfill cover construction completed
||Post closure monitoring commences
||Final Clean-up Action Plan commences
Indicator Substances for Groundwater Monitoring
||PCE, TCE, 1,2-DCA, 1,2-DCE, VC
||As, Mn, Sb, Cr, Pb
Clean-up Action Components
|Landfill Cover System
||30-mil PVC geomembrane layer with active gas extraction system and storm water control
|Gas Extraction System
||Landfill gas directed through biofilter system before discharge
|| Restrictions placed on access to groundwater and land use at site.
|Groundwater Compliance Monitoring
|| Includes a network of 15 groundwater monitoring wells.
This page was last edited 7/22/2015 11:15:51 AM .