Procedures for Dust Sampling - Michigan Mine Safety and Health 2025

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  1. Click ‘Get Form’ to open the Procedures for Dust Sampling document in the editor.
  2. Begin by reviewing the background section, which outlines the importance of site-specific hazard-awareness training. Ensure you have consulted with the Company contact person at least one week prior to sampling.
  3. Fill out the dust survey equipment section by listing all necessary personal protective equipment (PPE) and dust sampling tools required for your assessment.
  4. Complete Appendix 4, Table 1 by entering details such as date, company name, technician's name, and specific information about each person sampled including their job description and flowrate checks.
  5. Ensure that all data is accurately recorded during the sampling process. Monitor and note any changes in flowrate throughout the shift as specified in the protocol.
  6. After completing the sampling, finalize your report using Appendix 4, Table 2 to summarize results and send copies to relevant parties as instructed.

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RESPIRABLE DUST SAMPLING When respirable dust (50% cut point of 4 microns) is being evaluated, you will need to use a cyclone. This is a sampling device that excludes dust particles larger than the respirable size.
NIOSH Method 7500 - Silica, Crystalline, by XRD (filter redeposition) is the preferred method for most sampling where crystalline silica is in a mineral matrix such as concrete or asphalt.
How is gravimetric sampling done for respirable crystalline silica? A sample pump collect an air sample by pulling air through a cyclone. Different cyclones allow differently-sized particles to pass through. The pump captures larger particles while smaller particles collect on a filter.
Dust control measures in underground mines typically center on the use of low pressure watering systems to wet haul roads and to pre-wet materials. Even though water itself is sometimes considered to be free, wetting roads and materials in this way is actually expensive and also not entirely effective.
The NIOSH 0500 method is a time-tested and standardized procedure widely used across North America for total dust sampling. The method involves using 37 mm cassettes with the cassette opening facing downward to capture particulate matter.

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Two main analytical techniques are used to measure respirable crystalline silica: X-ray diffraction (XRD) and infrared (IR) spectroscopy. XRD methods can be used to analyze either respirable coal mine dust (RCMD) or MNM respirable dust samples, whereas IR methods are used only for RCMD samples.
Dust samples should be collected in a container that can be sealed tightly, like a zip-lock bag or plastic container with a tight sealing lid. Use a natural bristle brush to collect the samples. If you suspect you may have an electrostatically charged dust, collect the sample by using a plastic coated shovel or scoop.
0:40 2:45 Hold the tape by its ends. And press the sticky tape onto the dusty surface. And thats it youveMoreHold the tape by its ends. And press the sticky tape onto the dusty surface. And thats it youve now collected an imprint of dust on the tape.

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