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5-3 <br /> ♦ If additional berms are ineffective, the SSO may cut a diversion channel to avoid <br /> inundation of the refuse cell. <br /> ♦ Sandbags may be used in conjunction with berms or diversion channels. <br /> ♦ After the drainage problem is corrected, an assessment of possible damage or <br /> erosion will be conducted and all necessary repairs will be made. <br /> ♦ If the emergency is due to a flood that is from a 24-hour, 1000-year storm event or <br /> less, this is an indication that the drainage and flood protection design for the facility <br /> may be inadequate. A design review shall be performed and, if appropriate, all <br /> necessary modifications to drainage and flood protection facilities will be made. <br /> 5.7 Earthquake <br /> The following procedures will be performed following an earthquake incident: <br /> ♦ Employees driving in the field during an earthquake should stop their vehicle and get <br /> out, if it can be done in a safe manner. <br /> ♦ After the earthquake has subsided, site personnel shall report to the site entrance <br /> gate for a roll call. If medical care is required, the procedures in Section 5.13 shall <br /> be followed. An inspection of the site shall then be made and a report given to the <br /> SSO. <br /> ♦ Cracks observed in the final cover after an earthquake should be inspected with a <br /> combustible gas analyzer. The location of venting and the gas concentrations will be <br /> determined and reported to the SSO. Excavation and refill of the smaller surface <br /> cracks can be completed immediately. More extensive corrective actions will be <br /> authorized by the Site Engineer in accordance with the CQA Plan included as <br /> Appendix C. <br /> ♦ If a slope fails due to a Holocene magnitude earthquake, this is an indication that the <br /> slope or foundation stability design for the facility maybe inadequate. A design <br /> review shall be performed for conformance with design standards established at <br /> closure and, if appropriate, all necessary modifications to the landfill's slope design <br /> will be made. Temporary cover should be placed over any exposed waste; the type <br /> of temporary cover will be determined by the Site Engineer. <br /> 5.8 Surface Drainage Problems <br /> In the event of a surface drainage problem, the following procedures shall be followed: <br /> ♦ The SSO will investigate the problem and determine a necessary course of action. <br /> ♦ If a surface inlet is blocked with debris, all necessary labor forces and equipment will <br /> be implemented under the direction of the SSO to remove the blockage. <br /> ♦ If a storm drain is damaged, a plan will be provided by the Site Engineer to repair the <br /> problem. <br /> ♦ After the drainage problem is corrected, an assessment of possible damage or <br /> erosion will be conducted, and all necessary repairs will be made to meet the <br /> 24-hour, 1000-year storm event, the design standard for the drainage facilities <br /> established at closure. <br /> ♦ If the emergency is due to a flood that is from a 1000-year/24-hour storm event or <br /> less, this is an indication that the drainage facilities design for the landfill may be <br /> Forward Landfill Stage 16 Partial Final Closure/Post-Closure Maintenance Plan-June 2011 <br /> SWT Engineering <br /> z:\projects\allied waste\forward\11-1014 partial fnl clsr pin\partial final closure plan document\text\sec 5.doc <br />