National Technical Reports Library

The National Technical Information Service acquires, indexes, abstracts, and archives the largest collection of U.S. government-sponsored technical reports in existence. The NTRL offers online, free and open access to these authenticated government technical reports. Technical reports and documents in its repository may be available online for free either from the issuing federal agency, the U.S. Government Publishing Office’s Federal Digital System website, or through search engines.

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Title/Authors	Accession Number	Publication Year	Page Count
Simplified Modeling of Air Flow Dynamics in SSD Radon Mitigation Systems for Residences with Gravel Beds. Reddy, T. A; Gadsby, K. J; Black, H. E; Harrje, D. T; Sextro, R. G.	PB92195635	1992	81 pages
Engineering Design Criteria for Sub-Slab Depressurization Systems in Low-Permeability Soils. Fowler, C. S; Williamson, A. D; Pyle, B. E; Belzer, F. E; Coker, R. N.	PB90257767	1990	98 pages
Radon Reduction Techniques for Existing Detached Houses. Technical Guidance (Third Edition) for Active Soil Depressurization Systems. Henschel, D. B.	PB2000106361	1993	336 pages