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N~ ~~ ~ I~ <br />~~c~oc~l <br /> <br />Draft: 04/06/89 <br />1.0 SCOPE AND APPLICATION <br />1.1 Method 1312 is designed to determine the nobility of moth organic <br />and inorganic contaminants present in samples of soils, wastes, and <br />rastevatazs. <br />1.2 If a total analysis of the soil, waste, or rascevacer <br />desonscrates that individual contaminants era not present, or that they ar• <br />present but •t such low concentrations that ehe appropriate regulatory <br />thresholds could not possible be exceeded, Method 1312 need not be run. <br />1.3 If an analysis of any one of the liquid fractions of she 1312 <br />extract indicates that a regulated eospound is present at such high levels <br />that even after accounting for dilution from ehe ocher fractions of the <br />extract the concentration would be above the regulatory threshold for ehae <br />compound, then the waste is hazardous and LC La not necessary to analyze <br />the remaining fractions of the extract. <br />1.4 If an analysis of extract obtained using a bottle extractor shove <br />ehae ehe concentration of any regulated wlatil• contaminant exceeds'ehe <br />regulatory thseshold !or that compound, then the rote is hazardous and <br />extsaction using the 2IIE is not necessary. However, extract from a bottle <br />extractor cannot be used to desanscrate chat the caneeaeracion of volatile <br />compounds is below the regulatory thseahold, because recovery of volatiles <br />using the bottle extractor is usually lor. <br />2.0 S1iTRIARY OF MEiNOD (See Figure 1) <br />2.1 For sample• containing leas than 0.31 solids, the aasple, after <br />filtration through a 0.6-0.8 us glue fiber filter, !s defined as the <br />extract. For samples containing gzeatar than O.S~ solids, the Liquid <br />phase, if ast}r, is separated frog t!u solid phu• and stored for later <br />analysis. 'The particle size o! ehe solid phase of the separated sample is <br />reduced (it necessary) and is extracted with an amount of extraation Eluid <br />equal to 20 tines the wighc of ehe sample. the extraction fluid anployad <br />is a funetioa of the region of the country where the sample site is located <br />if the saa4la is a soil. If the sample is a waste or vascevacer, the <br />extraction fluid employed is a pN 4.2 solution. A special extractor vessel <br />is used when testing for volatiles. Following extraction, the liquid <br />extract i• separated frog the sample by 0.6-0.8 um glass fiber filter. <br />3.0 INiERFEREPiCES <br />3.1 Potential interferenee• chat may be •ncouncered during analysis <br />are discussed in the individual analytical methods. <br />1 <br />