Vapor Intrusion Investigation
Technical Questions
- •Is vapor intrusion occurring?
- •What contaminants are driving risk?
- •Are indoor air impacts related to subsurface contamination?
- •Could indoor sources explain the observed concentrations?
- •What mitigation measures may be appropriate?
Analytical Approach
- •Conceptual site model development
- •Vapor pathway evaluation
- •Indoor and outdoor air data review
- •Sub-slab and soil gas assessment
- •Background source differentiation
- •Risk screening and mitigation evaluation
Evidence Reviewed
- •Indoor air sampling results
- •Soil gas investigation data
- •Sub-slab vapor sampling data
- •Groundwater analytical reports
- •Building construction information
- •Occupancy and operational records
Litigation Relevance
Vapor intrusion liability depends heavily on technical evidence establishing connection between subsurface contamination and indoor air impacts. Strong pathway analysis and source differentiation evidence can determine whether properties are affected and whether mitigation obligations apply to specific defendants.
How UNISDOM Supports Counsel
UNISDOM assists attorneys by evaluating vapor intrusion evidence, reviewing sampling methodologies, assessing exposure pathways, and developing defensible technical opinions.