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Show ) ) Figure 2 illustrates the sampling protocol. In addition to the continuous monitors, which measured 02' CO, and C02' volatile organic sampling trains (VOST) collected samples at the afterburner and the scrubber exits. Thermal desorption purge and trap GC/FID analyzed for 22 volatile organic compounds. EPA reference Method 5 was used to collect samples for particulate load and arsenic and antimony analyses. The Method 5 train was modified to ensure collection of any antimony and arsenic which passed through the particulate filter. It consisted of a probe and a glass cyclone, followed by a filter and five impingers. The first impinger contained 0.1 N NaOH. The second, third and fourth impingers contained 0.2 M (NH4)2S208 + 0.02 M AgN03. The last impinger contained silica gel. Following collection and digestion, furnace atomic adsorption (AA) methods were used to analyze for arsenic and antimony. RESULTS Of the 18 planned tests, 12 were completed. The remaining 6 tests were generally unattainable due to flame stability problems at low flame temperatures and low excess air conditions. Trace Metal Discharges Good mass balance closure for antimony and arsenic could not be established during these tests. Table 1 lists the fractions of inlet antimony found at the afterburner exit, the scrubber exit and the scrubber blowdown water. As shown in the table, for the three tests where the feed contained nominally 26 percent chlorine, no more than about 1 percent of the inlet antimony, was measured in the afterburner exit flue gas. For one test with the nominally 19 percent chlorine feed, less than 0.1 percent of the 4 |