Scientific Investigations Report 2007–5179
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2007–5179
The authors gratefully acknowledge the contributions from the following USGS personnel: David W. Anning, Susan A. Thiros, Scott N. Hamlin, Jennifer L. Shelton, and Karen R. Burow for their contributions in describing the hydrogeologic setting of agricultural and urban areas from which data were collected and interpreted within this report; and Michael Rupert for his guidance in using logistic-regression methods for assessing relations among ancillary data and the occurrence of contaminants.