Agenda - 05-04-1987 - Laserfiche WebLink

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0 1 - The Town does not have the time or resources to complete this work before the capacity of the existing fill area north of Eubanks Road is exhausted. - Continued filling on a vertical expansion north of Eubanks Road will give the Town time to prepare the area south of the road, use borrowed material from the excavation for cover soil in the vertical expansion, and satisfy State and Federal requirements at both locations. 6. Current Operations The remaining disposal area north of Eubanks Road (about 6 to 9 months capacity with the current plan) requires trenching and filling operations under very dif- ficult operating conditions. The filling sequence has wound up at the low end (downslope) side of the site in the path of much of the surface water runoff from the 51 acre flat top. The working area is restricted in size and will re- quire progressive excavation of a long and narrow (50 ft.) trench about 15 feet deep along the entire length of the access road used by trucks dumping at the fill face. It would be best for operations if this entire area could be exca- vated at one time, followed by filling and completion of the long trench in one step. This can be achieved if disposal operations are shifted from the existing boxed-in corner to the start of the vertical expansion. This will allow the ex- cavation of the long trench to be made before resuming filling operations there. 7. Additional Considerations The vertical expansion will be designed to include: - a separate disposal area for UNC ash; and - a final cap about 3 ft. thick that would contain an impermeable layer about 6 inches thick containing a soil/Bentonite mix, and a landfill gas (methane) control system below the cap. Final grades on the landfill site will be suitable for open area recreation. We will incorporate soil mounds 5 to 6 feet thick at some locations for the planting of clusters of trees. CONCLUSION We believe that the revised plan represents the best course to follow for the Landfill with regard to environmental protection, operational efficiency and regulatory com- pliance. It will allow us to address our short term problems and provide us with about four years additional life on the site. Combined with a lined, mounded fill operation on the south side of Eubanks Road, we should have landfill capacity for 9-10 more years. There are many variables involved in such projections, and these reflect our best estimates with available information. In the longer term, there are many issues to address, such as future regulations, con- tinued growth and desired uses of available resources. Many of these issues will be joined with the study about to begin under the auspices of the Regional Solid Waste Task Force. One of our desires with the plan before you is to provide the decision makers of Orange County with the time with which to make the difficult decisions ahead. Our solid waste problems will not disappear, but should be under control for the near term. Prepared by: Bruce Heflin, Chapel Hill Public Works Director -3-