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in creator/contributor: "Lawrence Berkeley National Laboratory. Environmental Energy Technologies Division."  
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Gas and Particulate Sampling of Airborne Polycyclic Aromatic Compounds

Description: The denuder surfaces of the gas and particle (GAP) sampler (developed at the Atmospheric Environment Service of Environment Canada) have been modified by coating with XAD-4 resin, using techniques developed at Lawrence Berkeley National Laboratory (LBNL) for the lower capacity integrated organic vapor/particle sampler (IOVPS). The resulting high capacity integrated organic gas and particle sampler (IOGAPS) has been operated in ambient air at 16.7 L min{sup -1} for a 24-hour period in Berkeley, … more
Date: October 1, 1995
Creator: Lane, D.A. & Gundel, L.A.
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Partner: UNT Libraries Government Documents Department
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Factors Affecting Indoor Air Concentrations of Volatile Organic Compounds at a Site of Subsurface Gasoline Contamination

Description: We report a field study of soil gas transport of volatile organic compounds (VOCs) into a slab-on-grade building found at a site contaminated with gasoline. Although the high VOC concentrations (30-60 g m{sup -3}) measured in the soil gas at depths of 0.7 m below the building suggest a potential for high levels of indoor VOC, the measured indoor air concentrations were lower than those in the soil gas by approximately six orders of magnitude ({approx} 0.03 mg m{sup -3}). This large ratio is exp… more
Date: November 1, 1995
Creator: Fischer, M. L.; Bentley, A. J.; Dunkin, K. A.; Hodgson, A. T.; Nazaroff, W. W.; Sextro, R. G. et al.
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Partner: UNT Libraries Government Documents Department
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Bayesian Prediction of Mean Indoor Radon Concentrations for Minnesota Counties

Description: Past efforts to identify areas having higher than average indoor radon concentrations by examining the statistical relationship between local mean concentrations and physical parameters such as the soil radium concentration have been hampered by the noise in local means caused by the small number of homes monitored in some or most areas, In the present paper, indoor radon data from a survey in Minnesota are analyzed in such a way as to minimize the effect of finite sample size within counties, … more
Date: August 1, 1995
Creator: Price, P. N.; Nero, A. V. & Gelman, A.
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Partner: UNT Libraries Government Documents Department
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Scale Dependence of Soil Permeability to Air: Measurement Method and Field Investigation

Description: This work investigates the dependence soil air-permeability on sampling scale in near-surface unsaturated soils. A new dual-probe dynamic pressure technique was developed to measure permeability in situ over different length scales and different spatial orientations in the soil. Soils at three sites were studied using the new technique. Each soil was found to have higher horizontal than vertical permeability. Significant scale dependence of permeability was also observed at each site. Permeabil… more
Date: November 1, 1995
Creator: Garbesi, K.; Sextro, R.G.; Robinson, Arthur L.; Wooley, J.D.; Owens, J.A. & Nazaroff, W.W.
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Partner: UNT Libraries Government Documents Department
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The Influence of a Subslab Gravel Layer and Open Area on Soil-Gas and Radon Entry into Two Experimental Basements

Description: Measurements of steady-state soil-gas and {sup 222}Rn entry rates into two room-sized, experimental basement structures were made for a range of structure depressurizations (0-40 Pa) and open floor areas (0-165 x 10{sup -4} m{sup 2}). The structures are identical except that in one the floor slab lies directly on native soil whereas in the other the slab lies on a high-permeability gravel layer. The subslab gravel layer greatly enhances the soil-gas and radon entry rate into the structure. The … more
Date: March 1, 1995
Creator: Robinson, Allen L. & Sextro, R.G.
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Partner: UNT Libraries Government Documents Department
open access

A Review and a Limited Comparison of Methods for Measuring Total Volatile Organic Compounds in Indoor Air

Description: A number of methods attempt to measure the combined concentrations of volatile organic compounds (VOCs) in indoor air as total VOCs (TVOC). This paper reviews TVOC methods recently presently in the literature and in an international conference on indoor air quality for the purposes of identifying common practices and of assessing the impacts that choices of sample collection media and analytical methods and instrumentation can have on TVOC results. The paper also presents the results of laborat… more
Date: April 1, 1995
Creator: Hodgson, A. T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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