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Non -Petroleum Wastes: <br />The non -petroleum waste products such as scrap lumber, scrap concrete, unsalvageable scrap <br />Iron, and office trash are hauled to the pits. Salvageable scrap iron, including old mining equip- <br />ment, is sold to local scrap dealers. <br />In-shu coal left In the pits Is usually in the form of un -mined seams at ph ends. The pits are all <br />backfilled as part of the reclamation program. Any un -mined coal Is therefore covered with 20 to <br />150 feet or more of material. Any coal lost along the ribs would also be covered with at least 20 <br />feet of material. <br />4.3.2.3 Control of Impacts <br />The nature of the wastes generated at the mine she and disposed of In the pits naturally minimizes <br />many environmental Impacts. Windblown debris Is not a problem because most of the wastes are <br />lumber and tires. Any office trash disposed of In the pits will be covered sufficiently to prevent the <br />wind from scattering h. Neither wood, rubber, nor paper will produce significant quantities of <br />methane gas In this situation. They are resistant to decay and will be buried deep enough that <br />methane production will be minimal. The materials are Insoluble In water and therefore present no <br />leachate or runoff problems. The wastes would generally not provide a food source for animals <br />• and are burled deep enough that Insects and rodents will not be attracted to the area. <br />The relatively small amounts of waste disposed of In the pits over a large area precludes causing <br />subsidence problems. Although the wastes are all flammable, there will be no hot ashes or other <br />hot waste disposed of, so there <br />REVISED �IXV' 0 S '�B9 <br />• <br />4-20 REVISION <br />APPROVED <br />DATE. 5-2-10 <br />R -q9 <br />