Ozark Underground Laboratory, Inc. (OUL) is a private consulting and contract studies firm based in Protem, Missouri. Since 1973, OUL has been providing groundwater tracing and hydrogeological services nationwide and internationally, with a focus on land and water use issues in karst and fractured rock landscapes.
With a team of ten full-time employees, OUL has conducted over 4,000 groundwater traces in the United States, Canada, and various other countries. Their commitment to excellent quality work, attention to detail, and successful dye tracing investigations has made them a trusted resource for federal agencies, state and municipal clients, as well as corporate and private entities.
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