Using EPA 325 to Monitor VOCs in Ambient Air during Remedial Action at former MGP Sites
Heidi Hayes, Technical Director, Eurofins Air Toxics, LLC
Over the past several years, there has been growing interest in leveraging the practical and technical advantages of EPA 325 passive sorbent tubes to monitor volatile organic compounds (VOCs) from fugitive emissions generated during remedial action at former Manufactured Gas Plant (MGP) sites. As compared to conventional TO-15 canisters, passive sorbent tubes are simple to deploy and immune to sample media failures such as leaking connections or flow controller malfunctions which can compromise TO-15 sample validity. Although field deployment of passive samplers is straightforward, developing a project plan using EPA 325 requires proper sorbent tube selection for the targeted compound list and calculation of the required collection interval to meet project action levels. This presentation will cover the advantages and limitations of EPA 325 as compared to TO-15, and considerations when evaluating the viability of utilizing EPA 325 to monitor air quality during a MGP site remediation. Examples of successful implementation of EPA 325 in ambient air monitoring programs at MGP sites will be highlighted.
Heidi Hayes is the Technical Director at Eurofins Air Toxics in Folsom, California. Ms. Hayes has a MS in Chemistry from the Colorado School of Mines in Golden, CO, and over 28 years in the environmental laboratory industry with the last 25 years at Eurofins Air Toxics. She currently oversees the testing of new media, protocols, and technology related to air phase analysis.