Laserfiche WebLink
fl <br />n <br />Ell <br />j <br />F <br />0 <br />0 <br />n <br />u <br />0 <br />u <br />7 <br />Shallow Aquifer <br />Groundwater elevations at wells SB -1, MW -4, MW -5, MW -8, MW -9A, MW -10A, and MW -I IA <br />indicate that the off-site groundwater flow gradient in the shallow perched aquifer is to the north <br />(Figure 2 and Appendix G). The average calculated groundwater velocity is 8.369 ft/yr based on a <br />gradient of 0.03 feet per foot. <br />Deep Aquifer <br />The groundwater elevations at MW -6 and MW -7 indicate that groundwater flow is northeasterly <br />from MW -7 to MW -6 (Figure 3 and Appendix G). The average calculated groundwater velocity is <br />0.929 ft/yr based on a gradient of 0.0033 feet per foot. <br />Landfill Settlement <br />An iso -settlement map was prepared in accordance with the WDRs for this site, showing <br />settlement of up to six feet at one location between 1992 and October 8, 2013 (Figure 6). Note <br />that many areas of the landfill were regraded before the recent topography as part of normal <br />maintenance of landfill drainage. Iso -settlement maps will be prepared every five years; therefore, <br />the topography for this purpose will be prepared in 2018. <br />Corral Hollow Sanitary Landfill 17 Department of Public Works/Solid Waste <br />4`h Quarter and Annual 2013 Groundwater Monitoring County of San Joaquin — January 15, 2014 <br />