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1 <br />Consent Decree Exhibit C <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />WORK TO BE PERFORMED CHECKLIST <br />FOR THE <br />CLEANUP ACTIONS FOR EXISTING CONDITIONS <br />Gas Exposure Pathway <br />Conduct field investigation to determine accurate waste boundary. Install new <br />perimeter compliance landfill gas monitoring probe network. Monitor the perimeter <br />compliance sampling locations in accordance with the CMCP. <br />Prepare design report to define alternatives for contingent perimeter landfill gas <br />migration controls. Conduct easement negotiations if necessary. <br />Continued monitoring of the Animal Shelter, Transfer Station, and off -site buildings in <br />accordance with the CMCP. <br />Implement institutional controls such as signage and training. <br />Groundwater Exposure Pathway <br />Continued operation and maintenance of the leachate collection system until such <br />time that the shallow aquifer may be proven in compliance with chemical cleanup <br />criteria. <br />Installation of new compliance monitoring and upgradient monitoring wells. <br />Compliance monitoring includes deep aquifer groundwater quality monitoring as well <br />as monitoring of water levels in leachate collection system and shallow aquifer east of <br />leachate collection trench. <br />Maintenance of landfill cover and grading of surface topography. <br />Institutional controls to prevent groundwater withdrawal other than for leachate <br />collection or monitoring. <br />Direct Contact Exposure Pathway <br />Erosion control measures. <br />Institutional controls regarding Site use, maintenance of landfill cover, health and <br />safety requirements. <br />Maintenance of Site access controls (fencing, locked gates, signage). <br />Surface Water Exposure Pathway <br />Compliance monitoring includes semiannual sampling of surface water within the Site <br />boundary to determine compliance with cleanup standards at the point of compliance <br />Prepare and implement a SWPPP <br />Site inspections for and appropriate responses to leachate seeps, on -site ponding and <br />existing stormwater disruptions due to differential settlement <br />FINAL - March 2001 <br />4-5 Everett Landfill Tire Fire Site <br />Cleanup Action Plan <br />1 <br />