Presentation slide titled Attenuation Factors for Vapor Intrusion Screening with a photo of Rafat Abbasi, who is smiling and wearing glasses. The Geosyntec Consultants logo appears at the bottom left.
Published On: March 20th, 2026

Rafat Abbasi to Speak on Attenuation Factors for Vapor Intrusion Screening

Rafat Abbasi, PE, will co-present “Attenuation Factors for Vapor Intrusion Screening” at the California Certified Unified Program Agency (CUPA) Annual Training Conference.

He will present with Matthew Lahvis from Shell on Tuesday, March 24, 2026, at 1:00 p.m. PT in San Diego, California.

Rafat is a Senior Consultant based in California with more than 35 years of experience focused on vapor intrusion and on remediation of many types of properties, including manufacturing, commercial, agricultural, dry-cleaning, and military sites. Rafat worked with Robbie Ettinger to update the Johnson and Ettinger model that calculates vapor migration to indoor air. In addition, as Chief of Site Mitigation and Brownfield Program at the California Environmental Protection Agency DTSC, he helped develop the RCRA Corrective Action program and more than two dozen vapor intrusion guidance documents.

The CalCUPA Annual Training Conference brings together Certified Unified Program Agencies, regulators, and industry professionals for training, regulatory updates, and knowledge sharing. The conference supports consistent implementation of California’s Unified Program while highlighting best practices and emerging issues across environmental health and safety.

More Information on Vapor Intrusion Screening

Learn more about the annual training conference.
Learn more about CalCUPA.
For more information on vapor intrusion assessment and remediation, as well as related regulatory issues, contact Rafat at Rafat.Abbasi@Geosyntec.com.
Learn more about Rafat: Rafat Abbasi, PE