Extended Testing (Default to Test) Policy
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NOTE: This page is archived for historical purposes and is no longer being maintained or updated.
Letter to All Respirator Manufacturers
Issue Date: March 17, 2009
From: Heinz Ahlers, Chief, Technology Evaluation Branch, National Personal Protective Technology Laboratory
Subject: Extended Testing (Default to Test) Policy
The following is in response to requests for clarification of the NPPTL procedure for selecting tests for extension of approval requests.
Download complete document: Extended Testing (Default to Test) Policy [PDF - 33 KB]
- Page last reviewed: March 19, 2009 (archived document)
- Content source:
- National Institute for Occupational Safety and Health National Personal Protective Technology Laboratory