In the U.S. alone, about 5,000,000 people are diagnosed annually with ulcers, 1,000,000 are hospitalized, 40,000 undergo surgery, and 6,500 die from ulcer-related complications (Poms, 2001: Levin, 1998).

This project involved geologic and hydrogeologic approaches to investigate the release of naturally occurring arsenic concentrations to well water in a confined sandstone aquifer in northeastern Wisconsin.

This study investigates whether the processes of natural attenuation of volatile organic compounds (VOCs) that function in groundwater at small-scale sites such as spills and leaking underground storage tanks also apply at large-scale municipal solid waste (MSW) landfills.

The purpose of this report is to document the activities completed under Wisconsin Department of Natural Resources Grant Nos. NMH00000183 and NMI00000261.

The basis for understanding the abundance and distribution of arsenic in groundwater is reliable chemical analysis. Improvements in sample collection, sample pre-treatment, and on-site and off-site laboratory determination methods are sought to insure that information about arsenic is of high quality.

The principal objective of this report is to determine what is well known and what is less well known about the regional groundwater system in southeast Wisconsin in preparation for a comprehensive model aimed at addressing important water-supply issues.