Gradient Senior Scientists

Kathleen A. Radloff, Ph.D.

Dr. Radloff is an environmental engineer specializing in the geochemistry, fate, and transport of environmental contaminants .  Dr. Radloff has used her technical expertise for  the characterization of contaminated aquifers, risk-based exposure assessment, site remediation, environmental liability assessment, and litigation support.  She has experience with a wide range of contaminants including trace metals, pesticides, chlorinated solvents, and PCBs.  Her doctoral work focused on arsenic fate and transport in Bangladesh and specifically investigated how arsenic mobility restricted viable drinking water options in rural areas.  Prior to graduate school, Dr. Radloff worked on human health risk and exposure assessment as an Environmental Health Analyst at Gradient. 

Representative Projects

Hydraulic Fracturing Fluids Constituents Evaluation: As part of an evaluation of the potential for hydraulic fracturing (HF) of deep shale formations to affect potable aquifers, reviewed various state guidelines of drilling activities and the incidence of spills and violations. Performed preliminary review of several HF additives and their anticipated mobility in the subsurface.

Groundwater Modeling for Conceptual Remedy Design: In support of on-going remediation activities, assessed the current remediation performance of a chlorinated solvent plume.

TCE Groundwater Data Review: Reviewed groundwater sampling and remediation activities conducted for over 30 years at a site contaminated with chlorinated solvents. Compared methods in use to then-current practices.

Treated Wood Evaluation: Assisted in the evaluation of risks associated with chromated copper arsenate (CCA)-treated wood, including the review of studies on exposure pathways and transport of metals from CCA- treated wood.

Paint Manufacturer Risk and Exposure Assessment: Provided support for lead, arsenic, and/or cadmium risk and exposure assessments related to former paint manufacturing plants. Incorporated surface sample data with potential exposure pathways to determine associated levels of risk and appropriate remediation levels.

Lead Smelter Exposure Pathway Determination: Provided support for lead risk assessments for areas around a primary lead smelter. Assessed potential exposure pathways in residential and school settings.



Selected Publications

Radloff, KA; Zheng, Y; Michael, HA; Stute, M; Bostick, BC; Mihajlov, I; Bounds, M; Huq, MR; Choudhury, I; Rahman, MW; Schlosser, P; Ahmed, KM; van Geen, A. 2011. "Arsenic migration to deep groundwater in Bangladesh influenced by adsorption and water demand." Nat. Geosci. doi: 10.1038/ngeo1283.

Radloff, KA; Manning, AM; Mailloux, BJ; Zheng, Y; Rahman, MM; Huq, MR; Ahmed, KM; van Geen, A. 2008. "Considerations for conducting incubations to study the mechanisms of As release in reducing groundwater aquifers." Appl. Geochem. 23: 3224-3235.

van Geen, A; Radloff, KA; Aziz, Z; Cheng, ZQ; Huq, MR; Ahmed, KM; Weinman, B; Goodbred, S; Jung, HB; Zheng, Y; Berg, M; Trang, PTK; Charlet, L; Metral, J; Tisserand, D; Guillot, S; Chakraborty, S; Gajurel, AP; Upreti, BN. 2008. "Comparison of arsenic concentrations in simultaneously-collected groundwater and aquifer particles from Bangladesh, India, Vietnam, and Nepal." Appl. Geochem. 23: 3244-3251.

Radloff, KA; Cheng, ZQ; Rahman, MW; Ahmed, KM; Mailloux, BJ; Juhl, AR; Schlosser, P; van Geen, A. 2007. "Mobilization of arsenic during one-year incubations of grey aquifer sands from Araihazar, Bangladesh." Environ. Sci. Technol. 41: 3639-3645.




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