Laserfiche WebLink
GEOSYNTEC CONSULTANTS <br />Dr. Hari Sharma, P.E., G.E. <br />22 January 2001 <br />Page 2 <br />bedrock PHGA for the M,,, 6.4 MPE event on the Great Valley blind thrust system <br />equals 0.09 g. The expected median free -field bedrock PHGA for the M,r 6.7 MCE <br />event on the Great Valley blind thrust system equals 0.13 g. The expected median free - <br />field bedrock PHGA for the M,, 7.9 NTE (and the MCE) events on the San Andreas <br />fault system equals 0.06 g. <br />To characterize the MPE and MCE in the time domain, GeoSyntec selected a <br />suite of four accelerograms compatible with the above cited ground motion parameters. <br />These accelerograms may be used in seismic response analyses performed for landfill <br />design at the Forward Landfill site. <br />SEISMIC EXPOSURE EVALUATION <br />Background <br />The Forward Landfill is located at 9999 South Austin Road in San Joaquin <br />County, California, approximately 7 miles (11 km) southeast of Stockton. The site <br />location with respect to the major roads in the area is shown in Figure 1. Approximate <br />site coordinates are 37.877 degrees north latitude and -121.183 degrees west longitude. <br />The 157 -acre (63.5 ha) landfill site encompasses several Waste Management <br />Units (urMUs), including an 8 -acre (3.2 ha ) California Class I hazardous waste WMU. <br />The Class I unit, known as WMU A, was closed in 1989 and is currently in post -closure <br />monitoring. At present, only designated and non -hazardous wastes are treated and/or <br />disposed of at the Forward Landfill in either California Class II or Class ffi WMUs. <br />Seismic Hazard Evaluation <br />GeoSyntec evaluated the seismic hazard for the Forward Landfill site on the <br />basis of information provided in recent relevant studies of known active and potentially <br />P: IPRJ21CAWPWAPCALIF- WCIFORWARDIFOR-HAZ DOC <br />