The Leaders in Soil Gas Surveys and Vapor Intrusion Monitoring
Beacon Sample Collection Kit

BEACON INNOVATIONS AND RESEARCH

Beacon Environmental has developed a technique to enable the determination of passive soil gas concentration from an array of sorbed masses on a compound to compound basis. Beacon has listened to our clients and regulatory agencies across the country that have expressed an interest in using the results of passive soil gas surveys for risk assessment purposes. We would be glad to discuss this approach and how it can be implemented on one of your sites today.

Beacon Environmental completed two applied research projects that involve the comparison of various methods of vapor intrusion and indoor air testing methods. The first project involved side-by-side comparison vapor intrusion test methods at a former dry cleaning facility. Sorbent tubes in combination with an air pump (EPA Method TO-17) and SUMMA canisters with a regulator (EPA Method TO-15) were used to collect sub-slab samples at several locations. A comparison of the concentrations measured by each method revealed a linear relationship between molecular weight and the difference in concentration between the two methods. The second project involved side-by-side comparisons of EPA Method TO-17, EPA Method TO-15 and passive diffusion samplers for indoor air evaluation in several homes near a military base. The results indicate the two-week passive diffusion tubes time-weighted concentrations were slightly lower than the twenty-four hour exposures from the other two methods. The U.S. EPA may consider recommending longer-term sampling to achieve more accurate time-weighted-average detections. Beacon offers testing kits for both EPA Method TO-17 and passive diffusion samplers.