Minnesota Geological Survey
Report of Investigation   RI-55.
Arsenic in Minnesota Ground Water: Hydrogeochemical modeling of the Quaternary buried artesian aquifer and Cretaceous aquifer systems,
by Roman Kanivetsky
2000

The pdf map should be viewed using Acrobat Reader 4.0 or higher
for best results.  If necessary, download this file in binary, not ASCII. 
Also available as a printed report; contact the MGS Map Sales office at 612-627-4780, ex. 238 for price and availability.

WHEN PRINTING, LEVEL 2 POSTSCRIPT PRINT METHOD MAY NEED TO 
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There also have been problems when printing to large format plotters from Windows if the host machine prints using another networked computer as a spooler.  The large maps usually fail to print.  This problem has been solved by creating a port that accesses the plotter over a network directly without using an intermediate computer.