Calculate the Air Quality Index for 450 g/m3 SO2 (24-hour average). Assume the air temperature is 25 C and P = 1atm.

Table 1.11 Individual AQI Subindex Breakpoints 8-hr 03 24-hr 24-hr I Value 1-hr 03 PM-2.5 PM-10 8-hr CO 24-hr SO2 ppm ppm ug/m3 ug/m3 ppm ppm 0 0 0 0 0 0 50 0.059 15.4 54 4.4 0.034 100 0.075 0.124 40.4 154 9.4 0.144 150 0.095 0.164 65.4 254 12.4 0.224 200 0.115 0.194 150.4 354 15.4 0.304 300 0.374 0.404 250.4 424 30.4 0.604 400 (*) 0.504 350.4 504 40.4 0.804 500 (*) 0.604 500.4 604 50.4 1.004 Note: (*) means that only the 1-hr ozone concentration is used to calculate the index in these ranges