This timely new workbook is the result of a year-long effort by a group of university professors who first met at Montana Tech during the summer of 1994 for a college faculty workshop. The workshop was funded by the National Science Foundation's support for those faculty developing courses in the newly emerging field of air toxics. Part I of the book contains over 100 problems dealing with a variety of topics in this area. Part II provides detailed solutions. The problems and solutions provided will become a useful resource for the training of engineers and scientists who are or soon will be working in the field.