Laserfiche WebLink
GI„Cr+,c aJ Mt.u.ccC~ ~s a - 8~6~ <br />METHOD 1312 <br />SYNTHETIC PRECIPITATION LEACHING PROCEDURE <br />1.0 SCOPE AND APPLICATION <br />1.1 Method 1312 is designed to determine the mobility of boon organic <br />and inorganic analytes present in samples of soils, wastes, and wastewaters. <br />' 1.2 If a total analysis of the soil, waste, or wastewater demonstrates <br />that individual analytes are not present, or that they are present bu~~ at such <br />low concentrations that the appropriate regulatory levels could not possibly be <br />' exceeded, Method 1312 need not be run. <br />1.3 If an analysis of any one of the liquid fractions of the 1312 <br />extract indicates that a regulated compound is present at such high <br />concentrations that, even after accounting for dilution from the other fractions <br />of the extract, the concentration would be above the regulatory level for that <br />compound, then the waste is hazardous and it is not necessary to analyze the <br />remaining fractions of the extract. - <br />1.4 If an analysis of extract obtained using a bottle extractor shows <br />' that the concentration of any regulated volatile analyte exceeds the regulatory <br />level far that compound, then the waste is hazardous and extraction using the ZHE <br />is not necessary. However, extract from a bottle extractor cannot be used to <br />~~ demonstrate that the concentration of volatile compounds is below the regulatory <br />~'~ level. <br />2.0 SUMMARY OF METHOD <br />' 2.1 For liquid samples (i_e., those containing less than 0.5 percent <br />dry solid material), the sample, after filtration through a 0.6 to 0.8 µm glass <br />' fiber filter, is defined as the 1312 extract. <br />2.2 For samples containing greater than 0.5 percent solids, the liquid <br />' phase, if any, is separated from the solid phase and stored for later analysis; ~' <br />the particle size of the solid phase is reduced, if necessary. The solid phase ~~ <br />is extracted with an amount of extraction fluid equal to 20 times the weight of ~- <br />the solid phase. The extraction fluid employed is a function of the region of <br />the country where the sample site is located if the sample is a soil. If the <br />sample is a waste or wastewater, the extraction fluid employed is a pH 4.2 <br />solution. A special extractor vessel is used when testing for volatile analytes <br />' (see Table 1 for a list of volatile compounds). Following extraction, the liquid <br />extract is separated from the sample by 0.6 to 0.8 µm glass fiber filter. <br />' 2.3 If compatible (i.e., multiple phases will not form on combination), <br />the initial liquid phase of the waste is added to the liquid extract, and these <br />are analyzed together. If incompatible, the liquids are analyzed separately and <br />' the results are mathematically combined to yield a volume-weighted average <br />concentration. <br />1312 - 1 Revision 0 <br />November 1990 <br />