Helping clients to protect human health, Jeff complies with regulatory requirements, minimizes potential third party liabilities, and helps to remediate complex sites impacted by vapors from contaminated soil and groundwater. He also specializes in geochemical field investigations and assessments of the fate and transport of metals such as lead, cadmium, arsenic, and zinc in soils, sediments, surface water and groundwater.
For the past decade, Jeff has been an active participant in the vapor intrusion (VI) working group for the U.S. EPA. He also is the indoor air testing manager for one of the largest VI sites in the country, with responsibilities that include evaluating the extent of VI impacts and the performance of VI controls across the site. He has consulted on VI projects in Colorado, California, Kansas, Ohio, North Carolina, New Jersey, New York, Utah, and Wyoming.
As a consultant, Jeff has worked extensively for the U.S. Geological Survey and the Colorado Geological Survey on geological mapping and geochemical sampling that establish natural background concentrations of metals and acid in river basins near the Summitville gold mine, the Red Mountain Pass area, and the Grizzly Peak Caldera. This information has been used by the Colorado Department of Natural Resources to reclassify the fisheries in various river segments, to set appropriate stream standards, and to prioritize mine cleanup areas throughout the region.
To continue to advance the state of the practice, Jeff has designed regional exploration programs, geophysical surveys, mapping programs, stream sediment sampling programs, soil sampling programs, and drilling programs for a number of mining companies, including Battle Mountain Gold Company, Summitville Consolidated Mining, Challenger Gold Company, and Central Alaska Gold Company. Statistical and spatial analysis of geochemical and geologic data was a major component of this work.
Jeff is a member of the Society of Economic Geologists, the Geochemical Society, and the Association for Environmental Health and Sciences. He continues to advance the state of the practice as the author or co-author of numerous papers and presentations on the topics of site investigations near mines, background sources of indoor air contaminants, and performance of VI mitigation systems.