A problem of sequential decision making under uncertainty involving the testing and regulating of a potentially hazardous substance is analyzed using the Variable Sample Probability Ratio Test.

Rehabilitation of areas of contaminated groundwater often involves significant costs for site investigation. Whether to undertake a site investigation and when to bring an ongoing investigation to a closure are question facing decision-makers at many contaminated sites acress north America.

Rehabilitation of areas of contaminated groundwater often involves significant costs for site investigation. Whether to undertake a site investigation and when to bring an ongoing investigation to a closure are question facing decision-makers at many contaminated sites acress north America.

A problem of sequential decision making under uncertainty involving the testing and regulating of a potentially hazardous substance is analyzed using the Variable Sample Probability Ratio Test.