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III.B.3. Seismic Stability <br />14 CCR 17777 <br />Stability calculations are not required for cover slopes less <br />than 3:1 unless landfill is located in areas subject to <br />liquefaction or unstable areas with poor foundation conditions. <br />It is recommended that a geotechnical analysis be conducted <br />to determine if liquefaction conditions exist in the landfill <br />subgrade. <br />III.B.4. Settlement Analysis <br />14 CCR 17776 <br />The Austin Road Landfill Expansion Landfill Settlement <br />Appendix E, <br />Analysis letter report discusses landfill settlement and includes <br />Landfill Settlement <br />settlement calculations for final closure settlement, vertical <br />Analysis <br />expansion liner settlement, and horizontal expansion liner <br />settlement. It is recommended that additional geotechnical <br />investigation work be conducted prior to the final design of the <br />vertical expansion to define the compaction characteristics <br />and variability of the existing refuse fill. It is also <br />recommended that additional geotechnical investigation and <br />analysis be conducted to determine the settlement <br />characteristics of the horizontal expansion subgrade. <br />III.B.5. Leachate Generation <br />Leachate generation estimated using HELP model, see FDSR <br />Appendix I, FDSR <br />Appendix B "HELP Model and Leachate Generation <br />Appendix B <br />Quantities". <br />III.B.6. Drainage System <br />See FDSR Appendix D "Stormwater Detention Calculations" <br />Appendix I, FDSR <br />Capacity Requirements <br />for detention pond sizing calculations and ditch capacity <br />Appendix D <br />calculations. See RDSI Appendix L for creek relocation <br />Appendix L <br />design. <br />III.B.7. Gas Generation and Air <br />The Austin Road Landfill Expansion Landfill Gas Generation <br />Appendix F, II <br />Emission Calculations <br />Analysis letter report discusses gas generation and projected <br />Gas GeneratiLo <br />emissions. <br />Analysis <br />III.B.8. Soil Erosion Analysis <br />14 CCR 17779 <br />See FDSR Section 1.5.7 and FDSR Appendix C "Universal <br />Appendix I, FDSR <br />Soil Loss Equation Calculations". <br />Appendix C <br />I.V. DISPOSAL SITE IMPROVEMENTS <br />