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solid waste in an unlined landfill or waste pile could impair water quality. As moisture from infiltrating rainfall or from the waste itself percolates through the solid waste,soluble constituents are dissolved in the liquid phase. In this way leachate accumulates soluble waste constituents until it reaches the base of the landfill or waste pile. At that point, this "initial leachate" poses a water quality threat that is similar to that posed by the liquid waste considered in Section 3 3.2 above. The same environmental fate processes and attenuation factors that govern the potential impact of constituents of a liquid waste apply to constituents of the "initial leachate" from a solid waste. Therefore,the concentrations of constituents in the "initial leachate" which have the potential to degrade water quality are equal to the Total Designated Levels for constituents of a liquid waste. Therefore,from equation [I], Concentration of Constituent Water Environmental in "Initial Leachate" (mg/1) - Quality x Attenuation [2] s that could degrade water quality Goal (mg/1) Factor I 4 At this point, an assumption is made that the concentrations of soluble constituents in the waste itself (in mg/kg of waste)prior to leaching are numerically equivalent to their concentrations in the "initial leachate" (in mg/1 of leachate)formed from the waste. Therefore,from equation [2], 61A Soluble Concentration of Water Environmental Constituent in Waste (mg/kg of waste) Quality x Attenuation [3] that could degrade water quality Goal (mg/1) Factor As explained in the CAM SOR a concentrations in the "initial leachate" (in mg/l of leachate)could be lower,but could also exceed the soluble concentrations in the waste itself On mg/kg of=waste) — --- —Note:=Concentrations of constituentsin the-"initial leachate" should not be confused with .=concentrations of constituents to extract from the-Waste Extraction-Test.-They are not the - --- 4 T same. Concentrations of constituents in the "initial leachate" are the result of the a accumulation of constituents from the waste as moisture migrates through a IandfiIl or waste pile. Concentrations of constituents in the extract from the WET are the result of a ' specific laboratory procedure where waste constituents are extracted from a solid waste by an extract solution under a controlled set of circumstances. The extract from the WET i$, therefore, not a simulation of the "initial leachate",but a measure of the amount of waste _constituents-that-may be leached from the waste in-a IandfiIl. - - - - Soluble Designated Levels Extractable concentrations from the Waste Extraction Test are expressed in milligrams per [ 3 liter (mg/1) of extract, rather than milligrams per kilogram (mg/kg) of waste. Soluble Designated Levels for constituents of a solid waste should also be expressed in mg/1 of extract so that direct comparison with results from the WET may be made. However, .� conversion from the units of mg/kg of waste to mg/1 of extract must take into account the TO-fold dilution in the WET procedure as explained in Section 3.1.2, "Determining Designated Level Methodology Page 35 L