What is the maximum ground-level pollutant concentration (mg/m3) from an urban area elevated source with the effective stack height H = 20m, cyanide (HCN) emissions equal to 0.5 g/s, and the average wind velocity = 3 m/s with a stability class C for the atmosphere? Assume ?z = 100 m and ?y = 100m. Note: Assume the source is in an urban area.
What will be an ideal response?
For Stability Class C
Use equation 5.32 with equations in Table 5.22 and plot ????????(????,?,?) vs. ???? in Excel:
The maximum downwind concentration occurs at ~ 70m downwind from the smokestack 
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