Tape MPTER contains (1) an air quality simulation model, MPTER, and seven example runstreams for the model; (2) two postprocessor programs useful for determining highest and second highest concentrations for air quality simulation model output: TPHI5 for end-to-end averages and TPRN25 for running averages; (3) formatted meteorological data useful for CRSTER, RAMF, and MPTER example runs; (4) a program (UNFORMET) to convert the above meteorological data into unformatted form for entry to the stated models; and (5) a program PTPLU, an improvement of PTMAX, which determines maximum concentrations and distance to maximum concentration for a variety of wind speed and stability conditions. Calculations are made both for wind speed constant with height and wind speed increasing with height. MPTER is useful for estimating relatively non-reactive pollutant concentrations hour-by-hour using the Gaussian steady-state model. The model is most applicable for source-receptor distances less than 10 km in level or gently rolling terrain. Available options include terrain adjustment, gradual plume rise, stack downwash, and buoyancy-induced dispersion.