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18 <br />J.S. DEPARTMENT OF AGRICI7LT',7RE PAGE 3 OF 3 <br />NATURAL RESOURCES CON55RVATION SERVICE 09/9/00 <br />SANITARY FACILITIES <br />Endnote -- SANITARY FACILITIES--Continued <br />on soil properties, site features, and gbserved performance of the soils. Permeability, depth to bedrock or'te a <br />cemented pan, a high water table, slope, and flooding affect laoth types pf landfill. Texture, stones and boulders, <br />highly grganic layers; soil reaction, and content of salts and sodium affect trench type landfills. Unless otherwise <br />stated, the ratings apply only to that part of Che soil within a depth of about 6 feet. Fos deeper trenches, a <br />limitation rate "Slight" or "Mgderate" may not be valid. Onsite investigaticn is needed. <br />DAILX COVER FOR LANDFILL is the soil material that is used td ,cover compacted solid waste in an area type sanitary <br />landfill, The soil material is obtained offeite, transported to the landf111, and spread over the waste. <br />sail texture, wetness, coarse fragments, and slope affect the ease.gf removing and spreading the material during wet <br />and dry periods. Loamy or silty soils that are free of large stones or excess gravel are the best cover for a <br />landfill. Clayey soils may be sticky or glpddy and are difficult to spread; sandy soils are subject to sail <br />blowing. After soil material has been removed, the spit material remaining in the borrow area must be thick enough <br />over bedrock, a cemented pan, or the water table to permit revegetation. The soil material used as final cover for a <br />landfill should be suitable for plants. The surface layer generally has the best workability, mole organic matter than <br />the rest of the profile, and the best potential Por plants.. Material from the surface layer should be.stockpiled for use <br />as the final cover. <br />