Browse Illinois State Water Survey (ISWS) by Author "Barnhardt, Michael L."

  • Schock, Susan C.; Mehnert, Edward; Caughey, Michael E.; Dreher, Gary B.; Dey, William S.; Wilson, Steven D.; Ray, Chittaranjan; Chou, Sheng-Fu J.; Valkenburg, John R.; Gosar, Joan M.; Karny, Joseph R.; Barnhardt, Michael L.; Black, Walter F.; Brown, Michelle R.; Garcia, Vincent J. (Illinois State Water Survey and the Illinois State Geological Survey, 1992)

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  • Mehnert, Edward; Barnhardt, Michael L.; Ray, Chittaranjan; Greenpool, Mary R.; Dey, William S.; Vaisanen, U.; Kempton, J.P.; Curry, B. Brandon (Illinois State Water Survey and the Illinois State Geological Survey, 1992)
    The Illinois Groundwater Protection Act of 1987 (PA 85-863) mandated that the impact of pesticides on groundwater be evaluated. Because pesticide use is widespread in rural areas and groundwater is the major source of ...

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