ENV-17-20 Patching the Holes in the Fenceline – Updates to EPA 325 Requirements

Description:

As facilities began to implement fenceline monitoring requirements in preparation of meeting the regulatory mandated February 1, 2018 timeline, specific gaps in the methodology and prescribed work practices were identified. In response, corrections and clarifications to EPA Method 325 were addressed in an Alternative Test Method recently approved by the EPA. Issues addressed in the Alternative Test Method include updates to sample concentration equations, definition of allowable sample collection periods, and clarification of field duplicate requirements.