ARCHIVED REPORTS_1993_1 - Laserfiche WebLink

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II. Project Description exception to this procedure would be the placement of the initial layer in a new cell. The initial P P P Y waste layer would be placed so that the integrity of the geomembrane and sand drainage blanket would be maintained. The following paragraphs focus on specific measures that would be taken to protect the liner while maintaining efficient operations. Motor vehicles would never be allowed to drive directly over the geomembrane,anchor trench, and/or the sand drainage layer. Therefore the operator would need to construct an access road to (and operations/dumping pad in)a comer of the new cell. After construction,the landfill operator would regularly inspect the access ramps for signs of subgrade failure(pumping). [Beck: Should this be slumping rather than pumping?] Should severe pumping occur,the geomembrane must be checked for damage. The initial waste layer(i.e.,the waste placed directly on the liner drainage layer)would consist of - select waste. The select waste would be free of large, sharp or protruding objects(such as rebar, nails, 2 x 4s,etc.)that could be forced through the geomembrane. On-site landfill personnel would assist in screening and removing or repositioning waste that could damage the geomembrane. Refuse collection trucks would remain on the operations pad when discharging the first loads of select waste onto the liner. It is recommended that when several loads have been discharged,the operator would push refuse out on the liner with a tracked dozer. When a three to four foot thick bed of select refuse has been placed over the liner,the tracked dozer would be able to safely move over it,and continue building the first lift. Maximum compaction would not be the main goal for the first five feet of refuse. Instead,compaction should be sufficient to support subsequent refuse lifts,but minimized to protect the liner. Three passes with the tracked dozer over select refuse that is at least three to four feet deep would accomplish these goals. Maximum refuse compaction would be a desired goal once more than five feet of select waste have been placed over the liner. A minimum of five feet of select waste would cover the geomembrane and sand drainage layer before the waste compactor would be allowed into the new cell. Until the five foot minimum is met,the tracked dozer would be used to place and compact the refuse. A minimum of five feet of compacted,select refuse would cover the geomembrane and drainage layer before a road can be built on the refuse to accommodate truck traffic. At that time, a minimum six inch thick,26 foot wide(minimum)layer of on-site clean sand and gravel would be I1.24