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FRCM~[t"'l EOZ=r.Fy i~~KCN[CA F?X F,L.~ .~. iSSt 5~17P.M ~`P.1 <br />i ~ <br />sieving is necessary, a Teflon-coated sieve should be used to avoid <br />. contamination of the sample. <br />7.2.11 Determine tfle.amount of extraction fluid r.o aCd to the <br />extractor vessel as follows <br />1JeighC of <br />extraction fluid <br />20 ~c X solids (Step 1.1.1} x weight of waste <br />filtzied (Step i.2.~ or ).2.i) <br />100 <br />Slowly add this amount of appropriate extraction fluid (see Step <br />1.1.4) to the extractor vessel, Close the extractor battle tightly (it is <br />recommended that Teflon tape be used to ensure a tight seal), s=_cure in <br />rotary extractor device, and rotate at 30 ± 2 rpm for l8 ± 2 hours. <br />Ambient temperature (i.e., temperature of room in which extraction takes <br />place) shall be maintained at.23 ± 2'C during the extractfon period. <br />NOTE: As agitation continues, pressure may build up within the extractor bottle <br />far some types of sample (e•o•, limed or calcium carbonate-containing <br />sample may evolve gases such as carbon dioxide). 7o relieve excess <br />pressure, the extractor bottle may be periodically opened (e.g., after 15 <br />minutes, 30 minutes, and 1 hour) and vented into a hood. <br />7.2.12 Following the 18 ± 2 hour extrac`ion, separate the material <br />in the extractor vessel into its component ";u id and solid phases by <br />filtering through a need glass fiber filter, as outlined in Step 7.2.I. <br />For final filtration of the 1312 extract, the glass fiber filter may be <br />changed, if necessary, to facilitate filtration. Filter(s) shall be <br />acid-washed (see Step 4.4J if evaluating the mobility of metals. <br />7.2.13 Prepare the 1312 extract as follows: <br />].2.13.1 If the sample contained no initial liquid phase, <br />the filtered liquid material obtained from Step 7.2.12 is defined <br />as the 1312 extract. Proceed to Step 7.2.14. <br />7.2.13.2 If compatible (e•a., multiple phases wilt not <br />result on combination), combine the filtered liquid resulting from <br />Step T.2.12 with the initial liquid phase of the sample obtained <br />in Step 1.2.7. This combined liquid is defined as the 1312 <br />extract. Proceed to Step ].2.14. <br />I.Z.13.3 If the initial liquid phase of the waste, as <br />obtained from Step ).2.1, is not or may not be compatible with the <br />filtered liquid resulting from Step 1.2.12, do not combine these <br />liquids. Analyze these liquids, collectively defined as the 1312 <br />extract, and combine the results mathematically, as described in <br />Step ].2.14. <br />7.2.14 Following Collection of the 1312 extract, the pH of the <br />extract should be recorded. Immediately aliquot and preserve the extract <br />1312 - 12 Revision 0 <br />November 1492 <br />