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-5- <br /> <br /> Although the amount of leachate that is normally found is small, contamination <br />of groundwater by landfill leachate is a potential problem. <br /> <br /> As precipitation percolates through the landfill, some solids will be <br /> <br />taken into solution. The concentration of leachate constituents can vary <br />widely depending on waste density and corapDsition, cover material, moigture <br />oontent, temperature, and landfill age. Table 2 S~u,~rizes data on landfill <br />leachate comt~sition. <br /> <br />Table 2. IN: American Chemical Society, 1978 <br /> <br />Composition of leachate from land.fill <br /> <br /> Range of all <br /> Component values {mgd) <br /> <br />Alkalinity. [CaCO:) 0-20850 <br />BOD (five da:.,~ 9-54610 <br />(~dci~iln 5--4080 <br />COD 0-89520 <br />Copper 0-9.9 <br />Chloride 34--2800 <br />Hardness (CaCO~) 0-22800 <br />Iron -- total 0.2-5500 <br />Lead 0-5.0 <br />Magnesium 16.5-15600 <br />Manganese .(}~-1400 <br />Nib'o§eu [NH,) 0-1106 <br />Nitrogen [Kieldahl) 0-1416 <br />Nitrogen (NO~} 0-1300 <br />Potassium 2.8--3770 <br />Sodium 0-7700 <br />Sulfate 1-1826 <br />Total dissolved solid.: 0-42276 <br />'royal suspendad solids 6--2685 <br />Total pk~osphate 0-154 <br />Zinc 0-1000 <br />pH 3.?-8.5 <br /> <br /> S~u.,-c,~: Bruaer. D.. "Au Environmeutal Ass~sment of Potentlal Cas and Lea--hate Prcbh~ms at Land <br />DL, posal Sites," Open-[ile Report SW-I10, U.S. En',,ironmental Protection Agency, 1973. <br /> <br /> <br />