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3.3 4 Summary of Designated Level Calculations The Total Designated Level for a constituent of a liquid waste,expressed in milligrams of total or dissolved constituent per liter of waste (rng/i of waste),is equal to: Water Quality Goal (mg/1) x Environmental Attenuation Factor The Soluble Designated Level for a constituent of a solid waste, expressed in milligrams of constituent per liter of extract from the Waste Extraction Test(mg/l of WET extract),is equal to: Water Quality Goal (mg/1) x Environmental Attenuation Factor ?- 10 The Total Designated Level for a constituent of a solid waste, expressed in total milligrams of constituent per kilogram of waste (mg/kg of waste)is equal to: Soluble Designated Level x Leachability Factor x 10 or Water Quality x Environmental Attenuation x Leachability Goal (mg/1) Factor Factor If the total concentration of a constituent of a solid waste equals or exceeds the Total Designated Level but the extractable concentration of the constituent does not exceed the Soluble Designated Level, the waste should not be classified as a 'designated waste',since it is the extractable or soluble constituent concentration that has the potential to adversely impact water quality. If the total concentration of a constituent in a solid waste is less than ten (10) times the Soluble Designated Level for the constituent,it would be impossible for the extractable constituent concentration from the WET to equal or exceed the Soluble Designated Level; therefore,extraction testing would be unnecessary and the waste would not be considered a 'designated waste'. This is true because if all of the constituent was soluble,its concentration would be diluted by ten-fold in performing the WET and the resulting extractable concentration (in mg/l of extract) would be one-tenth (1/10)of the total concentration (in mg/kg of waste)prior to extraction. Note: Because fhe calculation of Total Designated Levels for solid wastes introduces an additional degree of uncertainty in the form of the leachability factor,extractable concentrations of solid waste constituents from the WET should be determined and compared with Soluble Designated Levels whenever possible. Note: In certain situations,a calculated Designated Level may fall below the concentration that is detectable using currently available analytical methods. In such cases, the Designated Level should be set at the "limit of detection" (i.e., if the constituent is detected,it is assumed to . exceed the Designated Level). Care should be taken to specify that the lowest acceptable method detection limit must be achieved by the laboratory. Page 40 Designated Level Methodology