COMPLIANCE INFO_1968-2006 - Laserfiche WebLink

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Si—A I SA 1 SANITARY LAND FILLS las •e been 3. Metal (cans, bedsprings, etc.): will rust and settle, but can be com- compacted. old for 4. Old tires: burnable rubbery, t. resilient; compressible, will not compact ,ration and will not decay readily. 5. Large organic' (stumps, wood): slow to rot but will burn; difficult to ; .argely compact and will prevent compaction of surrounding material Solving 6. Large metal (auto bodies, refrigerators, etc.): louse, somewhat com- ` 'e been pressible, and will rust; difficult to compact and will prevent densification useful of other adjoining materials. .se ob- 7. Demolition wastes (brick, earth, stone, etc.): somewhat compressible; 'obabl be compacted if y can p particles are smaller than 1 ft to 2 ft; larger pieces prevent densification and where nested together present hard spots in fill. r;f; large 8. Ashes: fluffy and will settle; may become cemented; can provoke cor- from rosion of other materials. ' waste ". t�a The density varies greatly. As delivered ► by collection trucks to the rani- •y land tart' land fill, it 'ranges from 200 lb to 700 lbs per cu yd or 7.5 lb to 26 lb re use per cu ft. (By way of contrast, typical soils weigh 100 lb to 130 lb per cu ft.) ►pment Much domestic waste is combustible; 50%to75%can burn. It is usually moist is, and with water content ranging between 10% and 35%. 1 cities The construction of sanitary land fills varies greatly with the community .ry fill and the degree of supervision or control. The simplest form is an uncon- � ild the trolled open dump in which thick masses of the waste are allowed to accumu- ost. In late and burn and eventually be covered with earth. In controlled filling, the be re- materials are dumped in layers or lifts from• 5 ft to 15 ft thick. In some c .. ig will cases, the wastes may be partially segregated by size or composition. In t in to a most controlled filling, there is an attempt to compact the waste using the icoun- construction equipment at hand, such as bulldozers and front-end loaders. )me of Experience indicates that the volume can be reduced to one-half or even one- would fourth of the as-delivered volume. This means the densities are increased to r4.: about 30 lb to 60 lb per cu ft or 800 lb to 1,600 lb per cu yd. Finally, the fill is covered with soil to minimize odor, rats, and insect nuisances. Generally, a 6-in. earth cover is placed on each segment of the fill at the close of each day. Therefore, a sanitary land fill consists of wastes in large cells or i s blocks, compartmentalized or encapsulated with thin membranes of soil. These cells may be compartmentalized in thin strata over broad areas, in com- relatively long deep trenches, or in wedges on slopes. A final cover of 1 ft ucting to 2 ft of soil is placed over the fill area to level the surface and present a nd in- neat surface. ularlya k; com- These ENGINEERING CHARACTER OF SANITARY LAND FILLS The surface of a sanitary land fill seldom gives a hint of the former nature V wet; of the area. It is usually relatively level, but slightly undulating. The levels use of change from time to time but this may not be easily discernible on visual in- spection. Frequently the ground contains numerous cracks and traces of,pre- t, can vious cracks. Deep rutting or gullying from rainfall may expose the true' nature of the fill at isolated points; however, because the fill is frequently ng Re- 'Rogers, C. A., aSolid Waste Materials," Technical Aspects of Planning for Solid r_ i Wastes, Ohio Department of Public Health, Columbus, 1965. , 6