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-n.~.. .~a. c~.cci vn. • ~v~n~rv.~ rM • F-l.U Ly. 1`JS< HETH00 1312 SYNTHETTr pQCrTDITATTDN tF,q[I.1TF1G poOCcnURc 1.0 SCOPE AND APPLICATION 9 ~ ! ! .mot •:;~- P . fz< 1.1 Method 1312 is designed to determine the mobility of both or;anic and inorganic analytes present in samples of soils and wastes. 2.0 SUMMARY OF METHOD Z.I for liquid samples (ile., those containing less than 0.5 X dry solid material), the sample, after filtration through a 0.6 to 0.8 um glass fiber filter, is defined as the 1312 extract. 2.2 For samples containing greater than 0.5 ~ solids, the liquid phase, if any, Ts separated from the solid phase and stored for later analysis; the particle site of the solid phase is reduced, if necessary. The solid phase is extracted with an amount of extraction flufd equal to 20 times the weight of the solid phase. The extraction fluid employed is a function of the region of the country where the sample sfte is located if the sample is a soil. If the sample is a waste or wastewater, the extraction fluid employed is a pH 4.2 solution: 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 sample by O.b to 0.8 µm glass fiber filter. 2.3 If compatible (i_e., multiple phases will not form on combination), thz ins*_ial tiouid'phase of the waste is added to the liquid extract, and these \ are analyzed together. If incompatible, the liquids are analyzed separately and ~~ *_he results are mathematically combined to yield a volume-weighted average concentration. 3.0 INTERFERENCES 3.1 Potential interferences that may be encountered during analysis are discussed in the individual analytical methods. 4.C APPARATUS AND MATERIALS 4.1 Agitation apparatus: The agitation apparatus must be capable of rotating the extraction vessel in an end-over-end fashion (see Figure I) at 30 ± 2 rpm. Suitable devices known to EPA are identified in Table 2. 4.2 Extraction Vessels 4.2.1 Zero Headspace Extraction Vessel (ZHE). This device is for use only when the sample is being tested for the mobility of volatile analytes (i.e., those listed in Table 1). The ZHE (depicted in Figure 2) allows for liquid/solid separation within the device and effectively precludes he ad space. This type of vessel allows for initial liquid/solid separation, extraction, and final extract filtration without opening the vessel (see Step 4.3.1). These vessels shall have an internal volume of 1312 - 1 Revision 0 November 1992