SLAPMAN is a set of computer programs designed to estimate concentrations for 19 chemicals migrating from an application area. The chemicals are: arsenic, cadmium, chromium, copper, lead, mercury, nickel, TKN, zinc, benzene, benzo(a)pyrene, bis(2-ethylhexyl)phthalate chlordane, DDT/DDE/DDD, dimethylnitrosamine, lindane, PCBs, trichloroethylene, toxaphene. SLAPMAN calculates a 'reasonable worst case' level of human exposure to chemicals leaching from an application area and being carried downwind by the atmosphere. Exposure levels can then be compared to health criteria to determine if they are likely to cause unacceptable impacts. SLAPMAN can also be used to calculate acceptable input concentrations given limiting concentrations at the aquifer. Software Description: The software is written in the Fortran programming language for implementation on IBM-PC or compatible machines using DOS 3.0 or higher operating systems. Minimum memory is 512K. Special features/requirements: Single floppy disk drive and a hard disk.