Research with EPA

USEPA (2012) Fluctuations of Indoor Radon and VOC Concentrations Due to Seasonal Variations.  EPA/600/R-12/673, September 2012 http://www.epa.gov/nerlesd1/cmb/research.htm#schumacher

USEPA (2010) Vertical Distribution of VOCs in Soils from Groundwater to the Surface/Subslab Soil Vapor Probe Equilibration Study, EPA Contract No. EP-C-05-061Task Order No. 65, Modification 7  http://www.epa.gov/nerlesd1/cmb/research.htm#schumacher

USEPA (2009). Vertical distribution of VOCs in soils from groundwater to the surface/subslab. EPA/600/R-09/073, August 2009. http://www.epa.gov/nerlesd1/cmb/research.htm#schumacher

USEPA (2007a). Final project report for the development of an active soil gas sampling method.  EPA/600/R-07/076, July 2007.http://www.epa.gov/nerlesd1/cmb/research.htm#schumacher

USEPA (2007b). Final project report for investigation of the influence of temporal variation on active soil gas/vapor sampling.  EPA/600/R-07/141, December 2007.http://www.epa.gov/nerlesd1/cmb/research.htm#schumacher

DiGiulio, D., C. Paul, R. Cody, R. Willey, S.Clifford, P. Kahn, R. Mosley, A. Lee, K. Christensen (2006b).  Assessment of vapor intrusion in homes near the Raymark superfund site using basement and sub-slab air samples. EPA/600/R-05/147, March 2006 (paid reviewer)

DiGiulio, D., C. Paul, R. Cody, R. Willey, S.Clifford, R. Mosley, A. Lee, K. Christensen  (2006a). Comparison of Geoprobe PRT and AMS GVP soil-gas sampling systems with dedicated vapor probes in sandy soils at the Raymark superfund site. USEPA/600/R-06/111, October 2006. (paid reviewer)

Hartman, B. et. al., (2007). Results from EPA Funded Research Programs on the Importance of Purge Volume, Sample Volume, Sample Flow Rate and Temporal Variations On Soil Gas Concentrations.  Proceedings AWMA Vapor Intrusion Conference, Providence, RI, September 2007 (primary author)