Project Description



Brooklyn, NY




NYC Dept of Transportation

Robert Samson, P.E.
Vollmer Associates
50 West 23rd Street
New York, NY 10010
(212) 366-5600

Potomac-Hudson Environmental, Inc. (PHE) has developed and conducted an air monitoring program to determine affects of bridge sandblasting activities (i.e., the removal of lead-based paint) on air quality and soil. The air monitoring program included collection of high volume samples and analysis for inhalable particulates (PM10) and lead concentrations in the project area. Concurrent meteorological data was collected with electronic weather stations located off-site. The soil program included the collection of soil samples prior to the removal of lead-based paint, midway through the operation, and following completion, and the analysis of all samples for lead.

The monitoring studies are part of an ongoing process by the NYSDOT, NYS Department of Environmental Conservation (NYSDEC), NYS Department of Health (NYSDOH) and NYCDOT to evaluate the effectiveness and impacts of sandblasting containment devices and methods to monitor them.

Air monitoring instruments (high volume TSP and PM10 units) were sited at each quadrant of the bridge as well as an off-site control location. Measured parameters included total suspended lead (TSP-lead), inhalable particulates (PM10) and meteorological data. Results were compared to standards which have been developed by NYCDOH to protect the safety and welfare of sensitive receptors. Comprehensive statistical analyses were run on the monitoring network data with particular emphasis on site/parameter correlations. Correlation analysis was used primarily to evaluate whether less comprehensive monitoring instrumentation could be employed for future studies.