Litigation and expert work

Fate and transport, source attribution and drinking water exposure evaluation for a water utility. I built the case’s data and analytics hub: 100K+ results from decades of scanned lab reports, 15+ laboratories, and 30+ sampling locations, consolidated into one database and dashboard where the legal team and experts could explore the data and insights themselves.

Because I built the data and understand the hydrogeology and contaminant chemistry, including which chemicals travel with dioxane and which only look like they should, I could spot the gaps that mattered and turn them into analyses that moved the case forward.

Exposure and risk assessment from drinking water; toxicology and epidemiology review; analysis of regulatory process for developing MCLs for PFAS in drinking water. Data and analytics hub for soil, sediment, groundwater, and surface water results from multiple bellwethers during the MDL process. This work supported the largest drinking water settlements against aqueous film forming foam (AFFF) manufacturers in U.S. history, including $12.5B from 3M and $1.185B from DuPont, Chemours, Corteva, and others.

My team and I then built the data systems and the software packages that let 1,850+ public water systems document and pursue their claims under the AFFF settlements, with total recovery above $1.65B.

I evaluate worker exposures to respirable crystalline silica (RCS) from cutting, sanding, and shaping engineered stone, particularly in California.

I support litigation over PCB contamination of soil and sediment, with geospatial models of contamination from spill events and dashboards that explain the findings to legal teams and communities.

How ambient air lead resulted in elevated blood lead levels in children living near a smelter in La Oroya, Peru; how water lead levels relate to service line material in Benton Harbor, Michigan, and what tap water results imply for children's blood lead; and lead exposure from consumer products and food under California Proposition 65.

Reconstructing historical exposure from asbestos-containing building products such as mortar, and studying how fibers released by cutting asbestos cement pipe travel through the air. The transport study is under peer review.

Cancer risk from sterilizer emissions, using dispersion modeling and site sampling data. I have evaluated the basis of EPA's IRIS cancer value and the NIOSH epidemiology behind it, and worked with emissions inventories, ambient monitoring data, and cancer registry data to test what the numbers mean for nearby communities.

Led the sampling program and decay model for formaldehyde emissions from laminate flooring, then used them to estimate cancer risk in homes against Proposition 65 benchmarks. The work was presented to the U.S. Consumer Product Safety Commission and published in Risk Analysis.

Community and worker exposure after a coal ash spill, using years of permanent and mobile air monitoring data and individual exposure histories.

Health risk from widespread contamination at a CERCLA Superfund site.

Air quality assessments using low-cost sensors, active sampling, and exposure chambers.

Exposure assessments, expert critique, and responses to Daubert challenges.

Hundreds of assessments over more than ten years for the most litigated listed chemicals, including lead, cadmium, phthalates, BPA, acrylamide, and formaldehyde, plus screening tools for very large product inventories.