The first edition of this book, Manual of Applied Field Hydrogeology, resulted from an enquiry by Bob Esposito of the McGraw-Hill Professional Book Group about Montana Tech of the University of Montana’s long running hydrogeology field camp, which was began in 1985 by Dr. Marek Zaluski (Chapter 14). This course was continued under the direction of John Sonderegger and myself from 1989 to 1996, when John Sonderegger retired. In 1997 Chris Gammons (Chapter 7) came on board, and he has assisted in directing this course until the time of this printing