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r ~;.n. inL c~_~,-N • ~~. .. _, :Ch FAX ~ _`c ._. _-S.. :~c2R'1 _P.1 <br />vertical position with the liquid inlet/outlet valve on top. <br />- Pressurfze the ZHE to 5-10 psi (if necessary) and slowly open the <br />liquid inlet/outlet valve to bleed out anv headspar.e (Soto a hood) <br />that may have been introduced due to the addition of extraction <br />fluid. This bleeding shall be done ,uickly zad shall be stopped <br />at the first ap ante of liquid from the valve. Re-pressurize <br />the ZHE with 5- and check all ZHE fittings to ensure that <br />they are closed. <br />7.3.12.3 Play the ZHE in the rotary e.tractor apparatus <br />(if it is not already there) and rotate at 30 ± 2 rpm for 18 + 2 <br />hours. Ambient temperature (i,e., temperature of roam in which <br />extraction occurs) shall be maintained at 23 + 2'C during <br />agitation. <br />7.3.13 Fallowing the 18 ± Z hour agitation period, check the <br />pressure behind the ZHE piston by quickly opening and closing the gas <br />inlet/outlet valve and noting the escape of gas. If the pressure has not <br />been maintained (i•e•, no gas release observed), the ZHE is leaking. <br />Check the ZHE for leaking as specified in Step 4.2.1, and perform the <br />extraction again with a new sample of waste. !f the pressure wfthfn the <br />device has been maintained, the material in Lhe extractor vessel is once <br />again separated into its component liquid and solid phases. If the waste <br />contained an initial liquid phase, the liquid may be filtered directly <br />into the same filtrate collection container (i^e., TEDLAR~ bag) holding the <br />initial liquid phase of the waste. A separate filtrate collection <br />container must be used if combining would create multiple phases, or there <br />is not enough volume loft within the filtrate collection container. <br />Filter through the glass fiber filter, using the ZHE device as discussed <br />in Step 7.3.9. All extracts shall be filtered and collected if the TEDLAR'. <br />bag is used,'if the extract is multiphasic, or if the waste contained an <br />initial liquid phase (see Steps 4.6 and 7.3.1). <br />NOTE: An in-line glass fiber filter may be used to filter the material within <br />the ZHE if it fs suspected that the glass fiber filter has been ruptured <br />7.3.14 If the Original sample contained no initial liquid phase, <br />the filtered liquid material obtained from Step 1.3.13 is defined as the <br />1312 extract. if the sample contained an initial liquid phase, the <br />filtered liquid material obtained from Step 7.3.13 and the initial liquid <br />phase (Step 1.3.9) are collectively defined as the 1312 extract. <br />1.3.15 Following collection of the 1312 extract, immediately <br />prepare the extract for analysis and stare with minimal headspace at 4'C <br />until analyzed. Analyze the 13]2 extract according to the appropriate <br />analytical methods. If the individual phases are to be analyzed.. . <br />separately (f_e., are not miscible), determine the volume of the <br />individual phases (to 0.57.), conduct the appropriate analyses, and combine <br />the results mathematically by using a simple volume- weighted average: <br />Final Analyte <br />Concentration <br />(Vi) (C~) + (VZ) (Ca) <br />V~ + VZ <br />1312 - 17 Revision 0 <br />November 1992 <br />