osha: Silica Exposure Rules


What does the new Silica Rule mean for you?

Find out here.



Employers can either use a control method laid out in Table 1* of the construction standard, or they can measure workers’ exposure to silica and independently decide which dust controls work best to limit exposures to the Permissible Exposure Level (PEL) in their workplaces.





Compliance Schedule

Construction: June 23, 2017

General Industry and Maritime: June 23, 2018

Hydraulic Fracturing: June 23, 2018


Table 1: Specified Exposure Control Methods

When Working with Materials Containing

Crystalline Silica

Dust Control Methods

Respirator/Assigned Protection Factor

Use saw equipped with integrated water delivery system that continuously

feeds water to the blade.

Operate and maintain tool in accordance with manufacturer’s instructions to minimize dust emissions.


≤ 4 hrs / Shift

> 4 hrs / Shift

When Outdoors

None                                   Yes, APF 10

When indoors /

Enclosed Area

Yes, APF 10                        Yes, APF 10

Exposure Control  Specifications

• Measure the amount of silica that workers are exposed to if it may be at or above an action level of 25 μg/m3 (micrograms of silica per cubic meter of air), averaged over an eight hour day.


• Protect workers from respirable crystalline silica exposures above the permissible exposure limit of 50 μg/m3, averaged over an eight-hour day.


The Standards Necessary Requirements


Establish and implement a written exposure control plan that identifies tasks that involve exposure and methods used to protect workers,

including procedures to restrict access to work areas where high exposures may occur.

Designate a competent person to implement the written exposure control plan.

Restrict practices that expose workers to silica where feasible alternatives are available.

Offer medical exams—including chest X-rays and lung function tests—every three years for

workers who are required by the standard to wear a respirator for 30 or more days per year.

Train workers on work operations that result in silica exposure and ways to limit exposure.

Keep records of workers’ silica exposure and medical exams.



Where the Standard Does Not Apply

The standard does not apply where exposure will remain low under any foreseeable condition; for example, when only performing tasks such as mixing mortar; pouring concrete footers, slab foundation and foundation walls; and removing concrete form work.


Additional information on OSHA’s silica rule can be found at www.osha.gov/silica.

To locate the OSHA On-site Consultation Program nearest you, call 1-800-321-OSHA (6742).



Farrell Equipment & Supply Co., Inc.

- Eau Claire, WI:

- Appleton, WI:

- La Crosse, WI:

- Madison, WI:

- Rochester, MN:

- Wausau, WI:

voice:  715-835-4334

voice:  920-903-1985

voice:  608-796-9300

voice:  608-222-5372

voice:  507-252-0234

voice:  715-355-8300

Terms & Conditions

1510 N. Hastings Way

Eau Claire, WI  54703

Headquarters: Eau Claire, Wisconsin   USA



Copyright © 2016 Farrell Equipment & Supply Co., Inc.  All rights reserved.

View Mobile Site