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Non-Water Release Corrective Action Plan <br /> North County Recycling Center and Sanitary Landfill <br /> acceleration assuming that the nearest fault ruptures nearest to the site), using an attenuation <br /> relationship from Boore, et. al. 1997 for a V530 of 275 m/s (USGS, Vs30 website), the MCE event <br /> on these faults is expected to produce a horizontal Probable Ground Acceleration (PGA) at the <br /> site of 0.1g. <br /> TABLE 1- MAXIMUM CREDIBLE EARTHQUAKE <br /> SEISMIC PARAMETERS FOR ACTIVE FAULTS (BLAKE, 2004; CALTRANS, 2014; USGS, 2008) <br /> APPROXIMATE DISTANCE MCE MOMENT PEAK GROUND <br /> FAULT FROM FAULT TO SITE(MILES) MAGNITUDE ACCELERATION,(GRAVITY) <br /> Great Valley 6-7(Midland, <br /> Vernalis, Midway, Black Butte, 29.8 6.8 0.1 <br /> San Joaquin Fault Zone) <br /> Great Valley 5(Vaca, Kirby <br /> 35.1 6.5 0.09 <br /> Hills,Davis) <br /> Concord/Mount Diablo 40.5 6.7 0.09 <br /> Marsh Greek/Greenville 41.4 6.9 0.08 <br /> San Andreas 78.4 7.9 0.08 <br /> Using the newer attenuation relationships of the Next Generation of Attenuation (NGA) <br /> ® Relationship Project in 2008 (Abrahamson, et.al, 2008, Boore, et. al, 2008, Campbell, et.al, <br /> 2008, and Chiou, et. al, 2008), and considering the faults, distance to the site, and site-specific <br /> configurations; a PGA of 0.09g is calculated for the Great Valley 6-7 Fault. A shear wave velocity <br /> (V53o) of the upper 30 meters of the site was taken to be 275 m/s for the underlying rock <br /> materials at the site (USGS, 2014). <br /> Review of previous data indicates that the seismic characterization of the site by Abrahamson <br /> (1994) utilized a PGA of 0.06g and a PGA of 0.1g in Abrahamson (2007) for the Maximum <br /> Probable Earthquake (MPE) event at the site using the older attenuation relationships. <br /> A search of historic earthquake events by the program EQSEARCH (Blake, 2000) indicates that <br /> the largest calculated historic peak ground acceleration (PGA) at the site in the last 200+ years <br /> was 0.13g from the 1906 San Francisco Earthquake of a Magnitude 8.25 approximately 81 miles <br /> from the site. That earthquake was also the largest recorded earthquake magnitude within 100 <br /> miles of the site. <br /> Review of the Department of Water Resources (DWR) comments to the vertical expansion <br /> report prepared by Shaw (2009) indicates that the DWR recommends a minimum PGA of 0.158 <br /> due to the "height of the embankment, the results of the simplified USGS analyses performed <br /> by DWR, and the possibility that a small earthquake, such as a M 5.5 or 6, can occur almost <br /> anywhere in California". <br /> 2013.A135 I N:\San Joaquin\North County\Non-Water Release CAP\Final Report\North County_NWCAP_Report_Final.docx <br /> July 2014,Rev.0 5 <br />