Question

Problem 01 (pts 15) Calculate the 'Air Quality Index (AQl) and the respective air pollution "Category" of the following conditions: i) 8hr Os concentration reported as 100 ppb. ii) 1 hr Os concentration reported as 0.245 ppm. ANS: 139.7 (Unhealthy for sensitive groups) i) 220.9 (Very unhealthy)

Answer 1

AQ 1 = (A Q^1_H) - (A Q^1_w)/(Con c_H) - (Con c_w) times [(con c_1 - (con c_w)] + (AQ^1_w) Where, Con c_i - input concentration for given pollutant Con c_w - The concentration break point that is lessthanorequalto con ci Con C_H - The concentration break point i. e, greaterthanorequalto Con_ci AQ^1_w - The AQ1 value Corresponding to Con C_i AQ^1_H - The AQ^1 value Corresponding to Con C_i Q) 8 hrs 0s concentration as 100 ppb (ie, 0.1 ppm). 1 hr 0s concentration as 100 ppm. [100 ppm] By using Table: (AQ1 & concentration Break point by pollutant) a) Take, Con C_1 rightarrow 0.1 ppm Con C_w rightarrow 0.086 ppm (lessthanorequalto 0.1 ppm) i.e lessthanorequalto Con c_i Con C_H rightarrow 0.200 ppm (greaterthanorequalto 0.1 ppm) i.e greaterthanorequalto Con c_i A Q^1_w rightarrow 151 [from table] A Q^1_H rightarrow 300 [From table] A Q^1 = 300 - 151/0.200 - 0.086 times [0.1 - 0.086] + 151 = 169.7 [unhealthy]
Generally the AQI is calculated using automatic machines