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The Copper Mountain Conference on Iterative Methods was held on March 29-April 4, 1998. Over 200 mathematicians born all over the world attended the meeting. (See attached list of participants). No matter how well organized, a conference is only as good as the talks presented. Under that measure this meeting was a great success. The quality and diversity of the talks was excellent. During the five day meeting 138 taIks on current research topics were presented (see the Fhal Program which is located at the front of Volume I of the attached Proceedhgs). Talks with similar content were organized into sessions. Session topics included:

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Cognizant scientist. Prepared test plan and designed experiment. Supervised performance of the test. Prepared analytical service request. Interpreted data and reportexi results. Hot cell technician. Performed test. Statistical analysis of data. Managed chemical and radiechemicai analytical work. Technical reviewer. Task Leader. 3.0 Experimental " %nmle Descri~tion. The sample used in this test was labeled as C104-GL. The C-104 HLW sample was composite as described in test plan BNFL-29953-031, C-104 San@e Co@osititzg.Figure 3.1 summarizes the compositing and sub-sampling scheme. The C-104 sample was received from Hanford's 222-S Laboratory on March 3, 1999. This material was received in 14 glass jars. Figure 3.1 lists the sample numbers along with the mass of material recovered from each jar. The material in the jars was transferred to a winless steel mixing vessel equipped with a motorized iinpeller. Before being used, all components of the mixing vessel were rinsed with methanol and then dried at 102°C for 12 h. Materials in the vessel were mixed for 1 h and 20 min before collecting sub-samples. The materials were actively mixed while sub-samples were collected through a 1.9-cm (.75-in.) ball valve located on the bottom of the vessel. The hot-cell temperature during the mixing process was 34"C. The first three sub-samples (C-104 COMP & B, and GL) were collected and allowed to setde. After approximately 10 days, the volume of settled solids in these three samples was measured to determine the effectiveness of the sub-sampling technique at collecting samples with representative solids/liquid ratios. The three sub-samples contained 88.9, 89.2, and 89.9 volO/osettled solids indicating that the sampling technique provided representative sub-samples. C-104"AsR~ived" samples Sample # Weight g Sample# Weight g c-'Aa Reoeivad" Analvticd Samdes G104(%mp A 168.9g C-104 Comp B 170.3 g C-104 Corn E 125.2 c-lcomposi:s'mogen WIi Solublitv vs. Temperature and El

*Elevationis the distancefromthe tmskbottomto the mouth of the samplebottle. The entire contents of each sample container were transfemed to a 1-L jaq the net mass transferred was calculated by difference from the fill and empty container masses.b The 860-g (659.8-mL) AP-1 01 composite was sealed and stirred for 54 minutes using a magnetic stir bar. A 10l-mL subsample was transferred to a glass bottle and sealed. For subsequent precipitatiordcrystallization testing at reduced temperature. Portions of the remaining composite material were used for subsequent analyses. The composite sample did not show signs of phase separation or precipitation. The overall sample processing is summarized in Figure 2.1. 2.2 Sample Digestion for Analysis After sample homogenization, the AP-101 composite sub-samples were delivered directly to the laboratories for various measurements including mercury, cyanide, hydroxide, tritium, total organic carbon, total inorganic carbon, ammoni~ion chromatography (inorganic and organic ions), 14C, pertechnetate, 79Se,and gamma spectrometry. The AP-101 composite density (see Table 3.5) was determined in the Shielded Analytical Laboratory (SAL). The SAL processed 5-mL aliquots in triplicate according to PNL-ALO-128, HNOS-HC1Acid Extraction of Liquids for Metals Analysis Using a Dry-Block Heater, for subsequent ICP and ICP/MS analyses. The acid extracted solutions were brought to a nominal 25-mL volume and absolute volumes determined based on final solution weights and densities. This acid digestion resulted in a solution with a small amount of white floating particulate. The floating particulate were removed by filtration. The filtrates were analyzed by ICP and ICP/MS. Along with the samples, the SAL processed a reagent blank, a toxicity characteristic leach protocol (TCLP)-metals spiked blank, and TCLP-metals spiked sample. The TCLP metals spike included Ag,