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<br /> <br />1 <br /> <br />1 <br /> <br /> <br /> <br /> <br /> <br /> <br />NOTE: Some wastes, such as oily wastes and some paint wastes, will obviously <br />contain some material which appears to be a liquid. Even after applying <br />vacuum or pressure filtration, as outlined in Step 7.2.7, this material <br />may not filter. If this is the case, the material within the filtration <br />device is defined as a solid, and is carried through the extraiction as a <br />solid. Do not replace the original filter with a fresh filter under any <br />circumstances. Use only one filter. <br />1.2.9 If the sample contains <0.5% dry solids (see Step 7.1.2), <br />proceed to Step 7.2.13. If the sample contains >0.5 percent dry solids <br />(see Step 7.1.1 or 7.1.2), and if particle-size reduction of they solid was <br />needed in Step 7.1.3, proceed to Step 7.2.10. If the sample as received <br />passes a 9.5 mm sieve, quantitatively transfer the solid material into the <br />extractor bottle along with the filter used to separate the initial liquid <br />from the solid phase, and proceed to Step 7.2.11. <br />1.2.10 Prepare the solid portion of the sample for extraction by <br />crushing, cutting, or grinding the waste to a surface area or particle- <br />size as described in Step 7.1.3. When the surface area or particle-size <br />has been appropriately altered, quantitatively transfer the solid material <br />into an extractor bottle. Include the filter used to separate the initial <br />liquid from the solid phase. <br />NOTE: Sieving of the waste is not normally required. Surface area requirements <br />are meant for filamentous (e.a., paper, cloth) and similar waste <br />materials. Actual measurement of surface area is not recommended. If <br />sieving is necessary, a Teflon-coated sieve should be used to avoid <br />contamination of the sample. <br />7.2.11 Determine the amount of extraction fluid to acid to the <br />extractor vessel as follows: <br />' Weight of <br />extraction fluid <br />20 x % solids (Step 7.1.1) x weight of waste <br />filtered (Step 7.2.5 or 7.2.7) <br />100 <br />Slowly add this amount of appropriate extraction fluid ;see Step <br />1.1.4J to the extractor vessel. Close the extractor bottle tightly (it is <br />' recommended that Teflon tape be used to ensure a tight seal), :secure in <br />rotary extractor device, and rotate at 30 ± 2 rpm for 18 ± 2 hours. <br />Ambient temperature (iue., temperature of room in which extract~~on takes <br />' place) shall be maintained at 23 ± 2'C during the extraction period. <br />NOTE: As agitation continues, pressure may build up within the extractor bottle <br />' for some types of sample (e•a•, limed or calcium carbonate-containing <br />sample may evolve gases such as carbon dioxide). To relieve excess <br />pressure, the extractor bottle may be periodically opened (e.a•, after 15 <br />minutes, 30 minutes, and 1 hour) and vented into a hood. <br />' 7.2.12 .Following the 18 + 2 hour extraction, separate the material <br />in the extractor vessel into its component liquid and solid phases by <br />' filtering through a new glass fiber filter, as outlined in Step 7.2.7. <br />1312 - 12 Revision 0 <br />' November 1990 <br />