Monitoring Methods Adaptable to Vapor Intrusion Monitoring: USEPA Compendium Methods TO-15, TO-15 Supplement (Draft), and TO-17;Rept. for 1 Jan 03-30 Jun 03

摘要

USEPA ambient air monitoring methods for volatile organic compounds using specially-prepared canisters and solid absorbents are directly adaptable to monitoring for vapors in the indoor environment. The draft Method TO-15 Supplement, an extension of the USEPA Method TO-15, highlights the lowering of VOC detection limits to single digit parts-per-trillion by volume (PPTV) concentrations using canister-based sampling along with analysis by bench top GC/MS. Diffusive sampling onto absorbent-filled sampling tubes similar to those described in TO-17 is being evaluated for sampling periods of 24 hours and less. Initial results indicate a linearity of response at the 2 parts-per-billion by volume (PPBV) level and excellent duplicate runs.