ABSTRACT
Equations derived previously for critical downwind distance x , wind speed u , and plume rise z , the values that produce maximum ground-level concentrations (MGLC) Xc under downwash conditions, have been solved. Tables of %c, xc, uc, and zc, and graphs of the relationships among uc and zc for a range of stack heights hs, and building heights hb, are presented. Results for two types of sources— a turbine and a reciprocating engine—are discussed. Some comparisons are made to the U.S. Environmental Protection Agency's (EPA) SCREEN3 model.