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On July 1, 1910, the U.S. Department of the Interior established the United States Bureau of Mines (USBM). The USBM worked to address the high fatality rate of mineworkers. In 1919, the USBM initiated the first respirator certification program in the United States. In 1920, MSA Safety Company manufactured the Gibbs respirator.

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Oct 13, 2020 · Researchers at ECRI found that up to 70 percent KN95 masks imported from China dont meet U.S. standards for effectiveness as with N95 masks. The group issued a CAMBRIDGE MASK Co - Cambridge Mask CoOct 21, 2020 · Cambridge Masks provide PRO and BASIC masks that filter over 99% and 95% of air pollution respectively. Cambridge Mask filters out pollution particles such as PM10, PM2.5 and PM0.3 as well as bacteria and viruses using a unique triple layer filtration system.

COVID-19 COVID-19 Frequently Asked Questions

1 If surgical masks are being used only as source controlnot to protect workers against splashes and sprays (i.e., droplets) containing potentially infectious materialsOSHA's PPE standards do not require employers to provide them to workers. However, the General Duty Clause, Section 5(a)(1) of the Occupational Safety and Health Act, requires each employer to furnish to each of his Comparison of Nanoparticle Filtration Performance of NIOSH NIOSH conducts respirator certification testing according to 42 CFR Part 84 (Federal Register, 1995) and the approved products are required to be labeled with NIOSH in capital letters and with other information including part and lot number and company name.

Interim Guidance on the Use of CBRN Full Facepiece

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