What are some of the possible risk pathways that you’ve encountered at the refinery. And how are you dealing with them?

Risk pathways include routes of exposure for contaminants to reach receptors. One potential pathway would be vapor migration into sewers or buildings. Vapor intrusion into buildings can be addressed through various engineering controls, such as positive pressure in a building or vapor barriers/mitigation systems. Potential sewer vapors are currently being controlled in multiple locations using remediation systems that extract air from the sewers.   Another potential risk pathway is direct contact with impacted soils, which can be controlled by eliminating the pathway via capping or use of personal protective equipment/safety standards.  All potential exposure scenarios and proposed mitigation measures will be detailed in future Cleanup Plans.