Kathy Hall, QEP, has been an Environmental Scientist with LimnoTech since 1991. Her work focuses primarily on waste load allocations, effluent permitting for point sources, and Total Maximum Daily Load (TMDL) evaluations. Kathy performs water quality-based effluent limit evaluations for both regulatory agencies and regulated communities, with emphasis on NPDES permit evaluations and negotiations for regulated discharges. She has conducted more than 80 NPDES permit reviews, focusing primarily on evaluating effluent limits for toxics; assessing water quality criteria and bioavailability issues; developing dissolved metal translators; and negotiating less stringent yet scientifically sound limitations. Kathy has also evaluated the effects of stormwater and combined sewer overflows (CSOs) on water quality and has conducted more than a dozen TMDL evaluations. Kathy works at LimnoTech’s Corporate Headquarters in Ann Arbor, Michigan.