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excavation. ~l'he analyses would be able to address hidden instability conditions on the <br /> site. The pu4pose of the analyses shall be to determine potential hazards for cut slopes, <br /> refuse slope~, and final cover. Measures shall be implemented to reduce specific <br /> identified slo~pe instability hazards. These measures might include reducing the slope <br /> angle, keying slopes, buttressing unstable areas and excavation sequencing from higher- <br /> lying to lo~er-lying parts of unstable slopes. Similar verification shall occur for <br /> temporary re~[use fill slopes for future fill sequences prior to construction of each cell. <br /> All slope stal~ility investigations shall be conducted by a certified engineering geologist <br /> and/or registered geotechnical engineer. All final grading plans and slope stability <br /> analyses shall be reviewed by the County Grading Inspector prior to the start of liner <br /> construction, i <br /> <br />39. The propose{l final topography shall be described in the Report of Disposal Site <br /> Information ~at would be submitted to the LEA as part of the application for a revised <br /> Solid Waste Facilities Permit. The LEA's approval of the application shall signify that <br /> the proposed [opography meets all of the applicable Title 14 requirements. <br /> <br />40. The operator! shall establish permanent survey monuments on and in the immediate <br /> vicinity of the landfill to monitor long-term landfill settlement or lateral displacement. <br /> The monum¢nts shall be periodically surveyed during the post-closure maintenance <br /> period. If he monitoring of settlement and displacement detects that more than <br /> anticipatednounts of movement of the monuments has occurred, an engineer or <br /> engineeringeologist shall be retained to make specific recommendations for correcting <br /> the stability ,roblem. A record of the monument survey results shall be filed with the <br /> LEA. <br /> <br />41. During the landfill development period, the operator's engineer shall conduct an <br /> investigation ~)f slope stability, including active working area, filled and closed areas, and <br /> nearby areaslthat could affect the landfill whenever there is rainfall of more than six <br /> inches in a flaree-day period that follows an accumulated seasonal (October through <br /> April) total r, infall of 15 or more inches. <br /> <br />42. The operator shall retain a qualified engineering geologist to conduct a site inspection to <br /> identify any potential indications of instability and to provide recommendations to <br /> stabilize or m[nimize hazards of slope instability as soon as possible, but not longer than, <br /> one week fol owing such a rainfall. A record of the engineering geologist's inspection <br /> and recomm¢ adations, and the operators response plan shall be filed with the LEA and <br /> RWQCB. <br /> <br />43. All offsite s! ope instabilities that could reasonably affect the landfill and perimeter <br /> drainage syst, ~m shall be identified by an engineering geologist and corrected at the time <br /> that filling is carried out in that part of the Expansion area. At the time of the final <br /> closure plan, no significant slope instabilities shall remain onsite or adjacent to the site <br /> that could re suit in damage to the landfill or the perimeter drainage system. The <br /> operator's en ;ineering geologist shall submit documented proof of compliance with this <br /> requirement ) the LEA and RWQCB. <br /> <br /> 15-B <br /> Final Aitamont Settlement - Exhibit B <br /> <br /> <br />