From Sample to Result: Expanding the Role of EPA Method 325 Across Fenceline & Ambient Monitoring Applications

EPA Method 325 is the standard method for benzene fenceline monitoring in the refinery sector and is expanding under updated regulations such as the 2024 HON rule. However, its value extends well beyond compliance-driven applications. Increasingly, Method 325 is being applied across a broader range of ambient monitoring programs, including perimeter monitoring during environmental remediation, community-based monitoring, and programs supporting emissions characterization and source identification. These expanded applications leverage the technical and practical advantages of passive sorbent sampling, but require a clear understanding of sampling principles to ensure appropriate analyte selection and collection intervals.

This presentation shares lessons learned from the laboratory perspective across both regulatory and non-regulatory uses of Method 325. We will highlight key considerations for designing successful monitoring programs, along with common challenges encountered throughout the process from sample collection through analysis and reporting.

Attendees will gain practical guidance on designing fit-for-purpose monitoring programs and applying Method 325 effectively across a range of use cases. The session will provide actionable insights to improve data reliability and support better decision-making.

Airdate:  Tuesday, June 9, 2026 - 1:30 PM ET
 
Length:  60 minutes 

Presenters: Heidi Hayes & Kesler Krieg - Eurofins Environment Testing