You are here:
FIELD MEASUREMENT OF VAPOR INTRUSION RATES AT A PCE SITE (ABSTRACT ONLY)
Citation:
EKLUND, B. M. AND M. A. SIMON. FIELD MEASUREMENT OF VAPOR INTRUSION RATES AT A PCE SITE (ABSTRACT ONLY). In Proceedings, Fifth International Conference on Remediation of Chlorinated and Recalcitrant of Compounds, Monterey, CA, May 22 - 25, 2006. Battelle Press, Columbus, OH, M-40, ISBN1574771574, (2006).
Impact/Purpose:
to present information
Description:
A field study was performed to evaluate vapor intrusion (VI) of tetrachloroethylene (PCE) and other chlorinated solvents at a commercial retail site in Dallas, TX. The building is approximately 40 years old and once housed a dry cleaning operation. Results from an initial site characterization were used to select sampling locations for the vapor intrusion study. The general approach for evaluating vapor intrusion was to collect time-integrated canister samples for off-site USEPA TO-15 analyses. PCE and other chlorinated solvents were measured in shallow soil gas, sub-slab soil-gas, indoor air, and ambient air. The sub-slab soil gas exhibited relatively high values: PCE up to 2,600 ppmv and trichloroethylene (TCE) up to 0.17 ppmv. The αss (i.e., attenuation factor) calculated from the ratio of indoor air and sub-slab soil-gas concentrations was usually low: approximately 5x10-6 based on the maximum sub-slab gas concentration of PCE. A tracer study was performed to quantify the ventilation rate within the building in terms of both total air flow (m3hr -1) and air changes per hour (ACH). Helium was introduced into the indoor space at a known rate and measured inside the building once steady-state conditions were reached. The rate of soil gas infiltration, Qsoil, was determined.
URLs/Downloads:
chlorcon
FIELD MEASUREMENT OF VAPOR INTRUSION RATES AT A PCE SITE (PDF, NA pp, 28 KB, about PDF)