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The National Personal Protective Technology Laboratory (NPPTL)1 of the National Institute for Occupational Safety and Health (NIOSH) has undertaken a study to evaluate the long-term field performance and reliability of self-contained self-rescuers (SCSRs) deployed in U.S. underground coal mines in accordance with the use and location requirements of Title 30 Code of Federal Regulations (30 CFR) Part 75.1714. This ongoing project provides visual inspection data and performance data on field deployed SCSRs. This report presents findings from the first phase of the SCSR LongTerm Field Evaluation Program (LTR1). The Mine Safety and Health Administration (MSHA) maintains a list of deployed SCSRs in the United States. From the MSHA list, NIOSH randomly selects 140 units each from four models to attempt a field collection of 100 SCSRs per model for laboratory testing. One hundred and forty units are chosen to allow for issues with obtaining specific units. The SCSRs that pass the manufacturer’s recommended visual inspection at the mine are collected and further evaluated by NPPTL including a second visual inspection, leak testing, gas flow testing, and breathing and metabolic simulation (BMS) testing. The tests performed in this study are not respirator approval tests; however, poor performance during testing led to the opening of a certified product investigation process (CPIP) on one SCSR model. The data obtained for the one model that underwent the CPIP investigation was reported in a Department of Health and Human Services numbered document that is posted on the NIOSH website. 1 A list of acronyms and abbreviations is available in Appendix A. NIOSH’s point-of-use assessments for selfcontained self-rescuers (SCSRs) found that mine operators are largely compliant with SCSR manufacturer-specified requirements and the devices tested appear to be sufficiently designed for mining use conditions.

Point-of-use assessment for self-contained self-rescuers randomly sampled from mining districts: first phase - sample period: May 2009 to July 2010.