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F~C1'1: Ir'L ~CZS%FN ~ TO~KCr1iC~ FAX ~ PCG :9. .553 0~__,-;t ?.1 manipulation of these materials should be done when cold (4'C} to minimize loss of volatiles. 7.3.1 Pre-weigh the (evacua*.ac'J filtrata collection container (see Step 4.6) and set aside. !f using a TEDIAR~ bag, express all liquid from the ZHE device into the boa, whether for the initial or final liquidjsolid separation, and take an aliquot from the liquid in the bay for analysis. The containers listed fn Step 4.6 are recommended for use under the conditions stated in Stops 4.6.1-4.6.3. 7.3.2 Place the ZHE piston within the body of the ZHE (it may be helpful first to moisten the pisten 0-rings slightly with extraction fluid). Adjust the piston within the ZHE body to a height that will minimize the distance the piston will have to move cote the ZHE is charged with sample (based upon sample size requirements determined from Step 7.3, Step 7.1.1 and/or 7.1.Z). Secure the gas inlet/outlet flange (bottom flange) onto the ZHE body in accordance with the manufacturer's instructions. Secure the glass fiber filter between the support screens and set aside. Set liquid inlet/cutlet flange (top flange) aside. 7.3.3 If the sample is 100': solid (see Step 7.1.1), weigh out a subsample (25 gram maximum) of the waste, record weight, and proceed to Step 1.3.5, 1.3.4 If the sample contains <0.5'/o dry solids (Step 1.1.2), the liquid portion of waste, after filtration, is defined as the 1312 extract. Filter enough of the sample so that the amount of filtered liquid will support all of the volatile analyses required. Far samples containing i0.5%: dr•y solidi (Steps 1.1.1 and/or 7.1.2), use the percent solids information obtained in Step 1.1.1 to determine the optimum. sample size to charge into the ZHE. The recommended sample size is as follows: 7.3.4.1 For samples Containing <5: solids (see Stap 7.1.1), weigh out a 500 gram subsample of waste and record the weight. 7.3.4.2 For wastes containing >S;b solids (see Step 7.1.1}, determine the amount of waste to charge into the ZNE as follows: Height of waste to charge ZHE percent solids (Step 7.1.1) 25 x 100 Neigh out a subsample of the waste of the appropriate size and record the weight. 7.3.5 If particle-size reduction of the solid portico of the sample was required in Step 7.1.3, proceed to Step 7.3.6. If particle- size reduction was not required in Step 7.1.3, proceed to Step 7.3.1. 7.3.6 Prepare the sample for extraction by crushing, cutting, or grinding the solid portion of the waste to a surface area or particle size 1312 - 14 Revision 0 November 1492