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Non-Water Release Corrective Action Plan North County Recycling Center and Sanitary Landfill TABLE OF CONTENTS 1.0 INTRODUCTION ..........................................................................................................1 1.1 Background ............................................................................................................. 1 2.0 GEOLOGIC AND HYDROGEOLOGIC OVERVIEW.............................................................1 2.1 Site Geology and Hydrogeology.............................................................................. 1 2.2 Surface Water Hydrology........................................................................................ 2 3.0 LANDFILL CONFIGURATION.........................................................................................3 3.1 Landfill Gas Migration Monitoring and Control System......................................... 3 3.2 Groundwater Monitoring System........................................................................... 3 3.3 Surface Water Controls........................................................................................... 3 4.0 REASONABLY FORESEEABLE NON-WATER IMPACTS.....................................................3 4.1 Seismically-Induced Impacts................................................................................... 3 4.1.1 Impacts from Ground Rupture.................................................................... 6 4.1.2 Impacts from Seiches.................................................................................. 6 4.1.3 Impacts from Tsunamis............................................................................... 6 4.1.4 Impacts from Liquefaction and Associated Dynamic Settlement............... 6 4.1.5 Impacts from Potential Slope Failure .........................................................7 is4.1.6 Summary of Impacts from Seismic Hazards ............................................. 10 4.2 Precipitation Impacts............................................................................................ 10 4.3 Fire Impacts........................................................................................................... 11 4.3.1 Subsurface Fires........................................................................................ 11 4.3.2 Wildfires.................................................................................................... 12 4.4 Flooding Impacts................................................................................................... 13 4.5 Non-Seismic Long-Term Performance.................................................................. 13 4.5.1 Final Cover System.................................................................................... 13 5.0 ANTICIPATED METHODS OF MITIGATION..................................................................14 5.1 Mitigation of Seismically-Induced Impacts........................................................... 14 5.2 Mitigation of Precipitation Related Impacts......................................................... 14 5.3 Mitigation of Fire-Related Impacts....................................................................... 14 5.3.1 Subsurface Fires........................................................................................ 14 5.3.2 Wildfires.................................................................................................... 15 5.4 Mitigation of Flood-Related Impacts.................................................................... 15 6.0 ESTIMATED NON-WATER RELEASE MITIGATION COST ESTIMATE SUMMARY.............15 7.0 CLOSURE AND LIMITATIONS......................................................................................15 ® 8.0 REFERENCES .............................................................................................................15 2013.A135 I N:\San Joaquin\North County\Non-Water Release CAP\Final Report\North County_NWCAP_Report_Final.docx July 2014,Rev.0