2017 Dust Extraction Solutions

OSHA® REGULATION ON RESPIRABLE CRYSTALLINE SILICA DUST

According to the Occupational Safety and Health Administration, over twomillion construction workers a year are exposed to crystalline silica dust. Foundin materials like concrete, tile, rock, stone and brick, exposure to silica dust canbe a major cause of a fatal lung cancer known as silicosis.Starting September 23, 2017, the OSHA® regulation on respirable crystalline silica dust(29 CFR 1926.1153) will be enforced for construction trades. This regulationreduces the Permissible Exposure Limit (PEL) to 50 µg/m³ over an 8-hour periodand will affect jobsites nationwide.

Compliance Methods

Table 1

(Compliance through OSHA®’sSpecified Control Methods) 

Rotary Drilling / Chipping

Drill or chip with a commercial dust collection system. Filtration must have a minimum 99% efficiency and a filter cleaning mechanism.

Cutting / Grinding

Use a shroud that is attached to a dust extractor with a suction rate of at least 25CFM per inch of wheel diameter. The dust extractor filter must have aminimum 99% efficiency and a filter cleaning mechanism.

Objective Data

Data provided by the manufacturer that proves users are below the PEL(Permissible Exposure Limit) when using engineered control methods such as MILWAUKEE® HAMMERVAC™ units or dust shrouds.

Self-Monitoring Program

Employers may choose to collect dust with alternative methods. This can betime-consuming and costly. If this option is chosen, employers must:

  • Purchase and utilize air quality monitoring systems.
  • Acquire test data from airmonitoring systems. 
  • Provide medicalassessments for employeesexposed to silica dust.

What Tools Does This Affect?

SDS Plus Rotary Hammers

Drilling

SDS Max Rotary Hammers

Drilling, Chipping, Dry Coring

Grinders

Masonry Grinding, Masonry Cutting

User Needs

  • SDS Plus User Need:

    When drilling concrete, users will need a commercially available shroud attached to a vacuum with 99% efficiency & a filter cleaning mechanism to be Table 1 compliant. A HEPA filter is required when cleaning holes.
     
    -OR-
     
    The user will need to have objective data proving less than 50 µg/m³ of exposure over an 8 hour period.
  • SDS Max User Need:

    When drilling/chipping concrete, users will need a commercially available shroud attached to a vacuum with 99% efficiency & a filter cleaning mechanism to be Table 1 compliant. A HEPA filter is required when cleaning holes
     
    -OR-
     
    The user will need to have objective data proving less than 50 µg/m³ of exposure over an 8 hour period.
  • Grinder User Need:

    When grinding or cutting concrete, users will need a commercially available shroud attached to a vacuum with 99% efficiency, a filter cleaning mechanism, and an air flow greater than 25 CFM per 1” of wheel diameter to beTable 1 compliant. For example, a 5” diamond cup wheel would need 125 CFM to be Table 1 compliant. 
     
    -OR-
     
    The user will need to have objective data proving less than 50 µg/m³ of exposure over an 8 hour period.