2017-03-10_REVISION - M1980244 - Laserfiche WebLink

Home Browse Search

METHOD 1311 TOXICITY CHARACTERISTIC LEACHING PROCEDURE 1 .0 SCOPE AND APPLICATION 1.1 The TCLP is designed to determine the mobility of both organic and inorganic analytes present in liquid, solid, and multiphasic wastes . 1.2 If a total analysis of the waste demonstrates that individual analytes are not present in the waste, or that they are present but at such low concentrations that the appropriate regulatory levels could not possibly be exceeded, the TCLP need not be run. 1.3 If an analysis of any one of the liquid fractions of the TCLP extract indicates that a regulated compound is present at such high concentra- tions that, even after accounting for dilution from the other fractions of the extract, the concentration would be above the regulatory level for that compound, then the waste is hazardous and it is not necessary to analyze the remaining fractions of the extract. 1.4 If an analysis of extract obtained using a bottle extractor shows that the concentration of any regulated volatile analyte exceeds the regulatory level for that compound, then the waste is hazardous and extraction using the ZHE is not necessary. However, extract from a bottle extractor cannot be used to demonstrate that the concentration of volatile compounds is below the regulatory level . 2.0 SUMMARY OF METHOD 2.1 For liquid wastes (i .e. , those containing less than 0.5% dry solid material ) , the waste, after filtration through a 0.6 to 0.8 pm glass fiber filter, is defined as the TCLP extract. 2.2 For wastes containing greater than or equal to 0.5% solids , the liquid, if any, is separated from the solid phase and stored for later analysis; the particle size of the solid phase is reduced, if necessary. The solid phase is extracted with an amount of extraction fluid equal to 20 times the weight of the solid phase. The extraction fluid employed is a function of the alkalinity of the solid phase of the waste. A special extractor vessel is used when testing for volatile analytes (see Table 1 for a list of volatile compounds) . Following extraction, the liquid extract is separated from the solid phase by filtration through a 0.6 to 0.8 pm glass fiber filter. 2.3 If compatible (i .e. , multiple phases will not form on combination) , the initial liquid phase of the waste is added to the liquid extract, and these are analyzed together. If incompatible, the liquids are analyzed separately and the results are mathematically combined to yield a volume-weighted average concentration. CD-ROM 1311- 1 Revision 0 July 1992