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Subject: <br />Job No.: 149259 Made by: P.Thomas Date: 3/16/2015 <br />Ref:Foothill LF Checked: E.Schneider Reviewed: E.Schneider <br />OBJECTIVE: <br />APPROACH: <br />REFERENCES:1. <br />2. <br />3. <br />4. <br />5. <br />GIVEN: <br />User Input Calculated <br />CALCULATIONS:Using the Bray procedure (Ref. No. 1): <br />1. <br />0.0970 g <br />0.78 s <br />50.00 s <br />From Fig. 2: <br />D5-95 = <br />Peak Horizontal Ground Acceleration (PHGA) of 0.0970g was determined from 2008 NGA Attenuation Model (Abrahamson & Silva) for <br />the controlling far-field event: N.San Andreas Fault (SAO+SAN+SAP+SAS) MCE of 8.05 (Mw). <br />Distance from Foothill Sanitary Landfill to N.San Andreas Fault (133 km) obtained from USGS Fault Source Parameters. <br />The MCE ground motion at the landfill was was determined from 2008 NGA Attenuation Model (Abrahamson & Silva) for N.San Andreas Fault <br />MCE of 8.05 — specifically, the PHGA of 0.0971g (Note: PHGA = Maximum Horizontal Acceleration = MHA). <br />The average waste fill height, based on the stability section (specifically in the area where rotational slide surfaces through the final cover are <br />generated), is approximately 125 feet (38 m). According to Kavazanjian et al. (1995), Figure 3 below, the shear wave velocity for an <br />approximately 38 m (125 ft) fill is estimated to be 320 m/s (see Fig. 3 below). <br />The yield acceleration, Ky = 0.1761g (see below). <br />"Evaluation of MSW Properties for Seismic Analysis," by E. Kavazanjian, N. Matasovic, R. Bonaparte, G. Schmertmann, 1995. <br />Seismic Slope Displacement for the MCE Event, Mw = 8.05 <br />Estimate the possible deformation of the Foothill Landfill final cover caused by the far-field MCE. <br />Using the Bray et al. (1998) method for estimating seismic displacements, quanitfy possible deformation caused by the MCE seismic event. <br />"Simplified Seismic Design Procedure for Lined Solid-Waste Landfills," by J. D. Bray, E. M. Rathje, A. J. Augello and S. M. Merry, 1998, <br />Geosynthetics International, Vol. 5, Nos. 1 - 2. <br />Foothill Landfill yield acceleration: Ky = 0.1761g (see below). <br />Given the MCE input below, use Fig 2(b) to estimate the mean period of acceleration-time history, Tm, and Fig. 2(c) to <br />estimate significant duration of shaking-time history, D5-95. <br />Event Distance <br />(km) <br />133 <br />Tm = <br />MHArock = <br />NotUsed:PGA <br />obtainedfrom2008 <br />NGAAttenuation <br />Model <br />0.78 <br />133 km 133 km <br />50 <br />Page 1 of 4