A chemical plant emits an air pollutant from a stack with the with the following parameters: stack height = 62.6 m plume rise height = 25.5 m It is a summer day with a few broken clouds. The sun is 42.5^o above the horizon. average wind speed = 6.82 m/s air pollutant source strength = 115 g/s PEL for this particular air pollutant is 25 g/m3 the ground may be either absorbing or reflecting (we will consider both)