Introduction Overview and Definitions Defining “volatile chemicals” Migration pathways Vapor Migration Issues Human health risks Universal nature of pathway Mitigation/Remediation Future property development/brownfields redevelopment  Vapor Chemistry 3 and 4 phase chemical partitioning Partitioning as predicted by: Henry’s law, vapor pressure, and Raoult’s law Vapor Physics Diffusion Fick’s law Advection Hydrogeology Soils Vapor permeability Heterogeneities Porosity (total, air-filled/water-filled) Perched water Preferential vapor migration Biodegradation Chlorinated VOCs Petroleum hydrocarbons  Building Design Issues Foundation types Space partitioning HVAC systems Regulatory Framework: ITRC guidance DTSC guidance & CHHSLs RWQCB ESLs Vapor Intrusion Investigations Sampling techniques for groundwater, soil, subslab, and indoor air Depth discrete Temporary vs. permanent monitoring points Analytical methods Spatial temporal variability Limitations Correlation to indoor levels

Data Analysis and Interpretation 90/95% UCLs Using means Partitioned buildings Separation of ventilation systems  Johnson and Ettinger Model Types Data needs Parameter sensitivities Accuracy Value Problems and limitations Guidance Case Studies Vapor Mitigation Systems and Engineered Controls Modified HVAC systems Air treatment Sub-slab depressurization (types, performance/reliability) Vapor barriers (types, specifications) Combination systems Vapor Remediation Source-zone treatment SVE systems Dual-phase Demonstrating compliance Off-gas treatment Institutional Controls Government controls Propietary controls Enforcement tools with IC components Informational devices Monitoring of ICs  New Developments in Vapor Intrusion Future of Johnson and Ettinger model EPA databases Correlation levels Empirical vs. theoretical results HVOCs vs. petroleum EPA guidance and use of generic attenuation factors Other vapor guidance

 

Elie H. Haddad

Mr. Haddad is a vice president for Haley and Aldrich where he is involved in vapor intrusion investigations, remediation and modeling, risk assessments, planning and strategy, development and implementation of RI/FS programs, engineering designs, hydrogeological activities, computer modeling, and operation and maintenance programs. He led an unprecedented, and perhaps largest, indoor air investigation at a Superfund site. His work established a benchmark for other EPA sites. Mr. Haddad has used his skills to allocate remedial costs among potentially responsible parties at several sites, and to allow redevelopment of several contaminated properties into commercial uses. He supervised the development of remedial design for several Superfund sites, developed and used soil, groundwater, and air dispersion model, and is an expert in hydrogeological applications. Mr. Haddad is also a faculty member of the University of California at Berkeley Extension Program where he has taught the course "Fate and Transport of Contaminants in the Environment". In addition, Mr. Haddad serves on the seminar committee of the Groundwater Resources Association where he has chaired several seminars on various topics including vapor intrusion.

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