Air Pollution Control

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c. An ACFM Ambient Cascading impactor having flow rate of 28 L/min was left within the Emancipation Park, New Kingston area to evaluate air quality for 1 week. The data from the impactor are shown in Table 1. Fill in the blanks in Table 1. [9] d. Estimate the ambient concentration of the median particle size collected? How would you evaluate the state of the ambient air? (6) Table 1 Cascade Impactor Data Reduction Stage Number Initial Mass(mg) Final Mass (mg) Net Mass (mg) Mass Fraction (%) 1 850.5 2 842.3 3 855.8 4 847.4 5 852.6 Downstream 78.7 Filter 850.6 844.1 861.0 853.6 855.1 79.3 Size Range of Cumulative Collected Mass Particles (um) Fraction >9.0 4.0-9.0 2.2-4.0 1.2 - 2.2 0.7 - 1.2 0.-0.7 Total Mass