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9 Attachment A 0 r IN <br />a. a review of earthquakes during <br />historic times; <br />b. location of active major faults; and <br />c. surface investigation of the site <br />and surrounding area; <br />2. the location of the critical slope and other slopes <br />analyzed to determine the critical slope shall be shown <br />in map view; <br />3. calculations used to determine the critical slope; <br />4. a profile of the critical slope geometry showing the <br />various layers including the proposed fill surface, final <br />cover, mitigation berms, lifts or cells of waste, fluid <br />levels, or any feature that may serve to reduce the <br />stability of the slope or may represent a potential failure <br />surface; and the proposed ground surface, soil or rock <br />layers and structural features,- <br />5. <br />eatures; <br />5. the engineering properties of the refuse and other <br />layers making up the site, shall be analyzed when <br />determining the critical slope. These properties shall <br />include a site specific assessment of the strength <br />parameters, the unit weight and, if using (f)(5)(D), the <br />shear wave velocity of each of these layers; <br />6. an assessment of the engineering properties of the <br />underlying foundation materials under both static and <br />dynamic conditions based on field and laboratory tests <br />as determined necessary by a registered civil engineer <br />or certified engineering geologist; <br />7. the maximum expected horizontal acceleration in rock <br />at the site determined for the design earthquake for the <br />Unit under section 20370 [i.e., for Class II Units, the <br />maximum credible earthquake (MCE), and for Class III <br />Units, at least the maximum probable earthquake <br />(MPE)], as supported by data and analysis. For Class III <br />landfills, the maximum expected acceleration in rock <br />from the MCE can be used instead of the MPE; <br />8. seismic shaking parameters other than acceleration <br />shall also be included in any assessment of dynamic <br />slope stability. These parameters shall include at least <br />earthquake magnitude and duration; <br />9. documentation of any peer reviewed reduction factor <br />for acceleration applied to attenuate the acceleration <br />through the soil column or fill materials; and <br />10. documentation, as part of the dynamic stability <br />determination, of any peer reviewed amplification factor <br />used for acceleration in loose saturated soils, if the Unit <br />is located in an area subject to liquefaction, poor <br />foundation conditions, or seismic amplification. <br />(D) In lieu of achieving a factor of safety of 1.5 under dynamic conditions, pursuant to <br />(f)(5)(C), the discharger can utilize a more rigorous analytical method that provides a <br />quantified estimate of the magnitude of movement. In this case, the report shall <br />demonstrate that this amount of movement can be accommodated without jeopardizing <br />the integrity of the Unit's foundation or the structures which control leachate, surface <br />drainage, erosion, or gas. <br />Page 2 of 2 <br />