This magnetic tape contains one file of 3274 card images (records) in ASCII character code. The file contains the FORTRAN source code for the main program and subroutines of the Reactive Plume Model (RPM-II) as well as 3 test data sets. RPM-II, developed by Systems Applications, Inc. of San Rafael, CA, is a computer air quality simulation model used primarily for estimating short-term concentrations of primary and secondary pollutant resulting from point-source emissions. Two main features of the model are (1) its chemical kinetic mechanism, which explicitly solves the numerous non-linear chemical reactions associated with NOx, ozone, and hydrocarbon cycles, and (2) the horizontal resolution within the plume, which offers a more realistic treatment of the entrainment process by partitioning the plume in a cross-wind direction into an array of well-mixed cells...Software Description: The system is written in the FORTRAN programming language for implementation on a UNIVAC 1100/82 computer using the 36RD2 operating system. 100K bytes of core storage are required to operate the system.