CANCELLED - Continuous Monitoring of VOCs in Indoor Air: Data from Real Sites

Ambient Air Measurements
Oral Presentation

Prepared by , M. Kram

Contact Information: [email protected]; 858-204-6170


Continuous monitoring enables the collection of a large volume of contaminant concentration data over time and allows instant recognition of concentration variations.
The continuous monitoring system consists of a gas chromatograph equipped with both a photoionization detector (PID) and an electron capture detector (ECD) and an automated gas sampling valve allowing vapor inputs from 16 different locations. The system is integrated with telemetry, geographical information systems and geospatial mapping algorithms which automatically generates contour images of contaminant concentrations, moving mean concentrations, and risk exceedance alerts through a Cloud-based visualization and response platform. This system will be demonstrated.

Data from a number of sites illustrating various applications of the technology will be presented. The data include a site undergoing remediation using thermal resistance heating, a site with a soil vapor extraction remediation system and a site with a sub-slab depressurization system. Ramifications from these data on how long is necessary to monitor contaminant concentrations will be discussed.