Laserfiche WebLink
<br /> <br />Foothill Sanitary Landfill Page 8 of 53 San Joaquin County DPW - Solid Waste <br />Joint Technical Document Revised 6/09/2020 <br /> <br />is not anticipated that soil will be imported for daily, intermediate, or final cover under the <br />present design scenario. <br /> <br />Assuming a 20% soil by volume in refuse fill, the excess soil available (18.7 million CY) <br />represents a potential 113 million CY of landfill capacity without importing soil. <br /> <br />4.5. Topography <br />The predevelopment contours of the site show the slope of the site to be northwest to southeast <br />(Figure 7). The present topography varies from approximately 220 to 360 mean sea level (MSL) <br />(Figure 2). <br /> <br />4.6. Climatology <br /> <br />4.6.1. Isohyetal Map and Precipitation <br />The isohyetal map for the region shows the average annual rainfall in the vicinity of the landfill to <br />be approximately between 10 and 20 inches per year (Figure 8). <br /> <br />The site receives an average of about 18 inches per year of precipitation as determined from <br />DWR Rainfall Depth Duration Frequency data for the Jenny Lind 3 SW Station about 4 miles <br />northeast of the site (2015 WDR). <br /> <br />4.6.2. Floodplain <br />The landfill facility is not within a 100-year flood plain based on the Federal Emergency <br />Management Agency’s (FEMA) Flood Insurance Rate Map, Community - Panel Number <br />06077C0390F, effective date October 16, 2009 (2015 WDR). <br /> <br />4.6.3. Design Storm <br />The average 24-hour precipitation event is about 1.6 inches, and the 100-year, 24-hour <br />precipitation event for this station is about 3.3 inches (2015 WDR). <br /> <br />4.6.4. Evaporation