Easy Testing: Simply remove testing device from sealed pouch and expose to the air for 3 months to 1 year;When test is completed, return to Lab in pre-addressed postage paid envelope along with enclosed data sheet;Rated #1 by a leading National Consumer Advocacy Group. The U.S. EPA has verified this product for accurate radon measurement.;Accustar Labs is the only Radon Testing Lab in the U.S. to use electrochemical etching to process its alpha track foils which are subsequently counted with computer-aided image analysis equipment.;Includes Test Results & Prepaid Return Shipping to Lab.
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