Prepare - 90 JT40/JT40 All Terrain Operator’s Manual
Classify Jobsite
Crystalline Silica (Quartz) Dust Precautions
Crystalline silica dust is a naturally occurring substance found in soil, sand, concrete, granite, and quartz.
Breathing silica dust particles while cutting, drilling, or working materials may cause lung disease or
cancer. To reduce exposure:
• Use water spray or other means to control dust.
• Refer to U.S. Department of Labor Occupational Safety and Health Administration guidelines to learn
more about appropriate breathing protection and permissible exposure limits.
Other Jobsite Precautions
You may need to use different methods to safely avoid other underground hazards. Talk with those
knowledgeable about hazards present at each site to determine which precautions should be taken or if
job should be attempted.
Breathing crystalline silica dust may cause lung disease.
Cutting, drilling, or working materials such as concrete, sand, or rock
containing quartz may result in exposure to silica dust. Use dust control
methods or appropriate breathing protection when exposed to silica dust.
To help avoid injury:
• Use water spray or other means to control dust.
• Refer to U.S. Department of Labor Occupational Safety and Health Administration guidelines to
learn more about appropriate breathing protection and permissible exposure limits.
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