In this episode, Dr. Jones is joined by Dr. Josh West, Professor of Earth Science and Environmental Studies at USC and one of the lead scientists for the CLEAN Project. They discuss heavy metals in soil after the January 2025 fires, with a focus on lead, how testing standards are used, and why understanding exposure is more complicated than a simple yes-or-no answer. Dr. West also explains how some contaminants come from fire impacts while others may already exist in the soil from past pollution or natural geology.