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SOP#NMS-ANA-SOP-SWDC REV#1.1 Title:Solid Wst.Disposal Characterization Effective Date 10/11/2012 <br /> 10.1.4. Repeat steps (sec. 10.1.1-10.1.3) if necessary to obtain constant weight. <br /> 10.1.5. Calculate the solid weight fraction (S) as shown in section (sec. 11.1) <br /> 10.2. Determination of extraction fluid: <br /> 10.2.1. Weigh about 5g of sample into a 400ml beaker. Particle size should be 1 mm <br /> or less in diameter. <br /> 10.2.2. Add 96.5ml of DI H2O to the beaker and cover with a watch glass. Stir for a <br /> duration of 5 min with a magnetic stirrer. <br /> 10.2.3. Measure the pH of the sample and record. If pH is <5 then use extraction <br /> fluid #1, if pH is >5 proceed to step 10.2.4. <br /> 10.2.4. Add 3.5ml of 1 N HCI to sample, slurry briefly and heat at -500C for 10min <br /> on a hotplate. <br /> 10.2.5. Let solution cool. Measure and record the pH. If pH is <5 then use extraction <br /> fluid #1, if the pH is >5 use extraction fluid #2. <br /> 10.3. Add 10.0 +/- 0.1 g of sample on a dry weight basis to extraction vessel (250ml <br /> polypropylene bottle). Calculate the amount of as-received sample (sec. 11.2) <br /> equivalent to 10g of dry sample. <br /> 10.4. Add the determined extraction fluid at a 1:20 ratio of dry sample-to-liquid ratio. <br /> (1g=1ml at room temp) <br /> 10.5. Securely fasten extraction vessel in bottle roller. <br /> 10.6. Place roller on bottle rolls and rotate end-over-end at 30 rpm for 18.00+0.25 <br /> hours. Record the duration of the leach from Start to end. <br /> 10.7. Set bottles aside and allow the solids to settle. <br /> 10.8. Set up a filtration device with enough capacity to filter 200ml. Use 0.7 prn TCLP <br /> borosilicate filter. <br /> 10.9. Filter at least 100ml of leachate. <br /> 10.10. Measure and record the pH immediately. <br /> 10.11. Collect about 125 ml of leachate in a poly bottle. Submit for ICP-26-DIG and Hg- <br /> COMB-L analysis. <br /> 10.12. Click hyperlink for instructions on performing Environmental Sub-Sampling <br /> Plato Malozemoff Technical Facility I Newmont Metallurgical Services <br /> The information contained in this report is confidential and proprietary. 4 <br />