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VOC SAMPLING IN THE WATER TABLE/CAPILLARY FRINGE AREA FOR ASSESSING IMPACT ON VAPOR INTRUSION AND INDOOR AIR QUALITY
Paul*, C J. AND D C. DiGiulio*. VOC SAMPLING IN THE WATER TABLE/CAPILLARY FRINGE AREA FOR ASSESSING IMPACT ON VAPOR INTRUSION AND INDOOR AIR QUALITY. Presented at Air & Waste Management Assn. Symposium, RTP, NC, 07/21-23/2003.
Vapor intrusion has been determined to be a major pathway for increased indoor air contamination from volatile organic contaminants (VOCs) at certain contaminated sites. In order to properly assess vapor intrusion, it is important to adequately evaluate VOC concentrations in the ground water in the vicinity of impacted residences or buildings. The Draft EPA Subsurface Vapor Intrusion Guidance Document states that ground water samples should be obtained form the uppermost portions of the groundwater and/or capillary fringe. There are inherent problems obtaining representative samples from the water table/capillary fringe area for VOCs, particularly when collecting samples from monitoring wells. However, the use of good sampling practices can maximize sample representativeness and accuracy of data.
Record Details:Record Type: DOCUMENT (PRESENTATION/ABSTRACT)
Organization:U.S. ENVIRONMENTAL PROTECTION AGENCY
OFFICE OF RESEARCH AND DEVELOPMENT
NATIONAL RISK MANAGEMENT RESEARCH LABORATORY
GROUND WATER AND ECOSYSTEMS RESTORATION DIVISION
SUBSURFACE REMEDIATION BRANCH