ArcGIS implementation of SAMPLE code documented in USGS OFR 90-4101.
For more information:
Squillace, Paul J., and Price, Curtis V., 1996, Urban land-use study plan for the National Water-Quality Assessment Program, USGS Open-File Report 96-217, 19 p. http://pubs.er.usgs.gov/publication/ofr96217
Scott, Jonathan C., 1990, Computerized stratified random site-selection approaches for design of a ground-water-quality sampling network, USGS Water-Resources Investigations Report 90-4101, 109 p. http://pubs.er.usgs.gov/publication/wri904101
This code is PROVISIONAL and SUBJECT TO REVISION. http://water.usgs.gov/software/help/notice/