Laserfiche WebLink
n <br />Loads that have exclusively inorganic materials (concrete, rebar) may be stored <br />indefinitely for use in building roads and winter pads. Non-putrescible materials, <br />which include mixed demolition materials such as wood, shingles, plasterboard, may <br />be stored up to 14 days before being covered. <br />5.5. Leachate Collection and Recovery <br />Future modules will include leachate collection and recovery systems, which will consist of a <br />network of piping surrounded with drainage gravel (Figure 18). The pipe network will be <br />equipped with riser pipes for inspection and cleaning if necessary. <br />Leachate will drain through the pipe network toward a leachate sump which will include sensors <br />and an automatic pump. Leachate will be pumped from these sumps and returned to Subtitle D <br />modules in accordance with the WDRs. <br />5.6. Drainage <br />County will design and construct temporary surface water drainage features to control runoff <br />and erosion as needed to control drainage as the landfill develops. Erosion will also be <br />controlled by establishing vegetation. Final surface configuration will include drainage berms or <br />benches to direct storm water away from refuse fill areas to the existing storm water facilities <br />(Appendix B). <br />Planned drainage features for the developed site (Appendix B) were sized using a peak flow <br />from a 100 -year occurrence storm. The Rational Method was used for design. With this <br />method, the design storm duration is set equal to the time of concentration for the longest flow <br />path. This is assumed to be the time at which peak flow occurs. Detention basins will be <br />constructed on the east side of the landfill. <br />Foothill Sanitary Landfill <br />Joint Technical Document <br />Page 23 Of 57 Public Works/Solid Waste <br />County of San Joaquin — Revised 7/30/10 <br />