Air Pollution Control

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. 191 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 2