CUPA-2020 Session Details

RISK-BASED DECISION MAKING AT VAPOR INTRUSION SITES
Mon, Feb 3    1pm - 2:45pm    56 of 100 seats available
M-F2   Cleanup
Location   SANDPEBBLE-DE
Credits      REHS: 2
   Objective
Currently, there is little guidance available to determine site-specific soil vapor cleanup goals. This session will present approaches for developing cleanup goals, and will highlight specific areas that should be thoughtfully considered when developing VI evaluation work plans and cleanup goals.
   Description
CalEPA has been reassessing their approach for evaluating the vapor intrusion pathway (VI) throughout California and is preparing a Supplement to the 2011 DTSC VI Guidance and 2014 San Francisco Bay Regional Water Board VI Guidance that incorporates default attenuation factors (AFs) from the USEPA. As a result, VI practitioners and PRPs in California have been facing challenges due to guidance documents in flux and varying opinions by state regulators on the appropriate path forward which has made it difficult to make risk-based decisions for site cleanup, especially where future buildings are planned. This workshop will focus on three specific areas which should be thoughtfully considered when developing site VI evaluation work plans, cleanup goals and decisions: The applicability and limitations of the USEPA generic attenuation factors, Impact of background sources of VI assessments, and Considerations and approaches for developing soil vapor cleanup goals.
   Speakers
Robbie Ettinger, Geosyntec Consultants
Gina Plantz, Haley & Aldrich
Ross Steenson, San Francisco Bay Regional Water Quality Control Board

   Presentation
Improving Risk-Based Decision Making at Vapor Intrusion Sites
Improving Risk-Based Decision Making at Vapor Intrusion Sites
Improving Risk-Based Decision Making at Vapor Intrusion Sites
Joint presentation on current VI topics by Robbie Ettinger (Geosyntec), Gina Plantz (Haley & Aldrich), and Ross Steenson (SF Bay Water Board)