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Pre-experiment phase with Air Conditioning off complete. Chamber-DMPS level at 0.02ug/m3 with stable baseline. Air Conditioning on shows DMPS mass at 0.06ug/m3, less than 1ppb increase in NO2. Full trace analysis conducted.
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Chamber cleaning and bkgd check 17.10.2010
Pre-exp with A/C off Pre-exp complete: chamber-DMPS 0.02ug/m3