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Non-Water Release Corrective Action Plan <br />North County Recycling Center and Sanitary Landfill <br />AU24.1294.00 | Non-Water Release Corrective Action Plan Update 15 <br />October 2024 <br />Because the landfill is still operational, it is assumed that a subsurface fire will begin around a <br />single malfunctioning landfill gas extraction well and will be identified and controlled after <br />spreading approximately 50 feet. It is also assumed that the fire will reach a depth of 10 feet <br />and will be suppressed by excavation and soil burial. It is assumed that the fire and excavation <br />would damage a single vertical landfill gas extraction well. <br />The 2024 cost for excavating and replacing waste, soil suppression, final cover placement, <br />erosion control, and construction of the replacement landfill gas extraction well is estimated to <br />be $166,555 (see Table D-2, Appendix D). <br />5.3.2 Wildfires <br />Wildfire impacts are not a reasonably foreseeable casual event; therefore, the cost for <br />mitigation is not included. <br />5.4 Mitigation of Flood-Related Impacts <br />Flood impacts are not a reasonably foreseeable casual event; therefore, the cost for mitigation <br />is not included. <br />6.0 ESTIMATED NON-WATER RELEASE MITIGATION COST ESTIMATE SUMMARY <br />Damage associated with precipitation and subsurface fire impacts is considered a reasonably <br />foreseeable casual event, and costs to mitigate hypothetical damage from these events is <br />estimated to be $127,978 and $166,555, respectively (see Table D-3, Appendix D). <br />Furthermore, the County is required to provide a funding mechanism to cover costs to mitigate <br />the higher of a water release or non-water release. Based on the most recent CalRecycle <br />Evidence of Financial Responsibility form dated June 1, 2021, the cost to mitigate the <br />foreseeable release to groundwater is $1,864,814, which is significantly higher than the <br />NWRCAP cost estimate. Therefore, it is recommended that the County maintain their current <br />funding mechanism to mitigate the reasonably foreseeable groundwater release for <br />$1,864,814. <br />7.0 LIMITATIONS <br />This report has not been prepared for use by parties or projects other than those named or <br />described above. It may not contain sufficient information for other parties or other purposes. <br />This report has been prepared in accordance with generally accepted civil and geotechnical <br />engineering practices and makes no other warranties, either express or implied, as to the <br />professional advice or data contained herein.