Hazardous Substances
Crystalline Silica
OSHA 2016 Standard
OSHA 2016 Standard
OSHA 29 CFR 1926.1153 · PEL 50 μg/m³ · Action Level 25 μg/m³ · Table 1 Tasks
OSHA's 2016 crystalline silica standard for construction is among the most significant safety rules issued in the last decade. Silica dust from concrete cutting, grinding, and coring is the specific hazard that causes silicosis — a progressive, incurable lung disease that has killed construction workers in New York City for generations. The standard is precise and enforceable. OSHA is actively citing NYC construction sites for violations.
OSHA Table 1 — The Preferred Compliance Method
- Table 1 specifies engineering and work practice controls for specific silica-generating tasks. Following Table 1 for the specific task means you are presumed compliant — no air monitoring required
- Handheld power saws (concrete/masonry): use saw with integrated water delivery system (wet cutting) or an integrated dust collection shroud connected to a HEPA vacuum
- Walk-behind saw: integrated water delivery system or integrated dust collection + HEPA vacuum
- Core drilling: integrated water delivery system or dust collection + HEPA vacuum
- Jackhammers / chisels: use water to suppress dust, OR use shroud/boot with HEPA vacuum
Engineering Controls — In Order
- Water suppression (wet cutting): most effective for most concrete cutting operations. Wet cutting eliminates most respirable silica dust at the source
- Local exhaust ventilation (HEPA vacuum system): for operations where water can't be used — indoor work on electrical equipment, drilling into walls
- Respiratory protection (last resort): P-100 filter when engineering controls are not sufficient. Air monitoring determines the exposure level and required respirator class
NYC Enforcement Reality
- DOB and OSHA have both specifically targeted silica compliance during NYC construction inspections since 2017
- Most cited violation: dry cutting without water or vacuum suppression — a saw making silica dust visible as a cloud is an immediate citation
- Employer must provide HEPA vacuums and wet-cutting equipment at no cost — workers should request them if not provided
Discussion Questions
- What is OSHA's preferred compliance method for Table 1 tasks and what does following it mean for air monitoring?
- You need to core drill a hole through a concrete wall for a sleeve. What silica control is required?
- You can see a visible cloud of dust from the cut-off saw in the next room. What immediate action do you take?
- Can silicosis be cured? What does this mean for how seriously workers should take prevention?
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