Estimating Residential Indoor Air Impacts Due to Groundwater Contamination
نویسنده
چکیده
The reliability of making risk-based corrective action (RBCA) decisions using ASTM methods was evaluated. Indoor air quality (IAQ) testing results for 153 residential homes in 1998 at a site in Denver, Colo., were evaluated in this study. Decisions regarding groundwater remediation and indoor air mitigation in residences located over a shallow groundwater plume contaminated with chlorinated compounds were made based on actual test results. These decisions could have been based on the predicted concentrations of the compounds in indoor air using the Standard Guide for Risk-Based Corrective Action Applied at Petroleum Release Sites (ASTM E1739-95). Risk-based screening levels may be useful to guide general project decisions. However, variance of results from house to house is significant due to site-specific geological, building, and ventilation factors. Based on the results of this evaluation, indoor air quality testing should be used, rather than RBCA predictive modeling, to establish the extent of impacts and determine the need for mitigation.
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