||Some Results from the Demonstration of Indoor Radon Reduction Measures in Block Basement Houses.
Henschel, D. B. ;
Scott, A. G. ;
||American ATCON, Inc., Wilmington, DE.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
Residential buildings ;
Pollution control ;
Vacuum equipment ;
Concrete slabs ;
Drain tiles ;
Stationary sources ;
||Some EPA libraries have a fiche copy filed under the call number shown.
The paper gives results of tests of active soil ventilation techniques in 24 block-wall basement houses in eastern Pennsylvania having significantly elevated indoor radon concentrations, generally above 740 Bq/cu m. The results indicate that radon levels can be reduced substantially (often below the U.S. EPA guideline of 148 Bq/cu m) if effective suction can be drawn on the soil underneath the concrete slabs of these houses. Such effective suction appears achievable when either: (1) the house has a complete loop of drain tile around its footings for water drainage purposes, and suction is drawn on that loop; or (2) a sufficient number of suction pipes can be inserted at the proper locations into the crushed rock or soil underneath the slab.