OSHA Dust Regulation and Husqvarna 29 CFR 192629 CFR 1926.1153 Dust and Husqvarna Dust and Husqvarna • Many Husqvarna products are a source of creating dust or slurry • RCS (respirable

OSHA Dust Regulation and Husqvarna

§29 CFR 1926.1153

Dust and Husqvarna

Dust and Husqvarna

• Many Husqvarna products are a source of creating dust or slurry

• RCS (respirable crystalline silica) is almost always present on jobsites

• All of our end users are likely exposed to RCS at some time

• It is key to have efficient dust/slurry management solutions to offer

• Husqvarna now offers more products to manage dust and slurry

OSHA – Tasks that may involve exposure

Grinding Hand grinding

Sawing Crushing stone or concrete

Drilling Hauling, dumping, disposal

Edging Chipping

Breaking (jack hammers) Precasting

Shot blasting Broom sweeping

Scarifying Blowing

Demolition Barrel mixing

Masonry work Drywall sanding

Many others . . .

OSHA – Table 1

• Table 1 matches common construction tasks with dust control methods, so employers

know exactly what they need to do to limit worker exposures to silica. The dust control

measures listed in the table include methods known to be effective, like using water to

keep dust from getting into the air or using ventilation to capture dust. In some

operations, respirators may also be needed.

• Employers who fully and properly implement the engineering controls, work

practices, and respiratory protections specified in Table 1, are not required to

measure respirable silica exposures to verify levels at or below the PEL for

workers engaged in a Table 1 task.

Assigned Protection Factor (APF) 10 is more commonly known as N-95 or “2 strap” mask

OSHA Table 1 Example

• Equipment / Task identified

• Recommended Engineering or Work Practice Control Methods

• Respirator requirements (if applicable)

• Other requirements (if applicable)

• HEPA filter requirements

(High-efficiency particulate air filter means at least 99.97 percent efficient in removing mono-dispersed particles of 0.3 μm in diameter)

• CFM requirements

• Additional notes not specified in Table 1

Each employer shall:

”for tasks performed indoors or in enclosed areas, provide a means of exhaust as needed to minimize the accumulation of visible airborn dust”

”for tasks performed using wet methods, apply water at flow rates sufficient to minimize release of visible dust”

Alternative Exposure Control Methods

• Employers who do not use control methods in Table 1 must:

– Ensure workers are protected from respirable crystalline silica exposures above the

permissible exposure limit of 50 μg/m3, averaged over an 8-hour day

– Conduct an Exposure Assessment with either a Performance Option or Scheduled Monitoring

• Performance Option – Assess employee exposure over 8 hour TWA on the basis of air monitoring data or

objective data sufficient to accurately characterize the task being done.

• Scheduled Monitoring – Perform initial monitoring for exposure over 8 hour TWA from personal breathing

zone air samples and repeat per the OSHA standard until levels are below the action level of 25 μg/m3

– Ensure alternative methods of compliance are followed (engineering controls, PPE, etc) to

protect workers from silica exposures above the PEL

– Provide respirators to workers when dust controls cannot limit exposures to the PEL

Dust and Husqvarna

• Global R&D dust testing facility Gothenburg, Sweden

Objective Data

• Supplied by Husqvarna as a supplement to written control plans, specifically when

alternative exposure control methods “Performance Options” are used (outside of

Table 1 recommendations).

• Visit www.husqvarnacp.com/us/silica for Objective Data summaries and detailed lab

reports of each test.

http://www.husqvarnacp.com/us/silica

Dust Related Testing Examples

• First round of testing completed – Local (North Carolina)

• Soff-Cut 4200 Green Zone w/ broom (passed, 8 hrs)

• Soff-Cut 4200 / 1000 vac / Husqvarna dust plate (passed, 8 hrs)

• Second round of testing - Gothenburg R&D

• DM 220 / S 13 (passed, 8 hrs)

• Soff-Cut 4000 / 1000 Vac / Husqvarna dust plate (passed 8 hrs)

• Soff-Cut 150D / S 26 (passed 6 hrs)

• MS 360 dust shroud / S 13 (passed 4 hrs)

• K 3000 / S 13 (passed 1 hr)

Equipment/Task Engineering and Work Practice Control Methods Required Respiratory

Protection and Minimum

Assigned Protection

Factor (APF)

How

Husqvarna

can Help

≤ 4 hrs/shift > 4 hrs/shift

(xiii) Walk-behind

milling machines

and floor

grinders

Use machine equipped with integrated water delivery

system that continuously feeds water to the grinding

surface

OR

Use machine equipped with dust collection system

recommended by the manufacturer. Dust collector

must provide the airflow recommended by the

manufacturer, or greater, and have a filter with 99%

or greater efficiency and a filter-cleaning mechanism.

When used indoors or in an enclosed environment,

use a HEPA filtered vacuum to remove loose dust in

between passes.

None

None

None

None

Dust Extractors

to fit every size

grinder and

various shot

blasters and

scarifiers

Air Scrubbers

Remote Control

units

Optional water

spray

attachments

Table 1 Surface Prep Grinders

Additional engineering controls to reduce exposure

• Air Scrubbers - add circulation and remove airborne dust with HEPA filtering

• Remote control units – move operator further from dust source

• Multiple HEPA filters are important for proper air flow

• Testing and certification is the only way to be sure

All Husqvarna Dust Extractors have individually certified HEPA filters to a

minimum 99.99% @ 0.3μm

HEPA Filters

OSHA – HEPA Vacuums

Husqvarna compliance

• High quality HEPA filters that are tested and certified, with a rating of at least

99.99% at 0.3 μm

• 25 CFM PER BLADE INCHES REQUIRED FOR HAND GRINDERS.

• High CFM & Water Lift for proper matching to equipment

• Must have a mechanical filter cleaning method contained, allowing no dust to

escape

• Multi levels of filtration, that may include a cyclonic chamber, pre-filters, HEPA’s

and pre separators.

• Drop down bagging containment systems, no dust can or tray.

• Availability to attach tools for collection at the source

• Wet (W 70 P) and dry (S and T line extractors) availability when needed.

• Recommended by the manufacturer



Assigned Protection

Factor (APF)

How

Husqvarna

can Help

≤4 hrs/shift > 4 hrs/shift

(xi) Handheld

grinders for

mortar removal

(i.e. tuckpointing)

Use grinder equipped with commercially available shroud and dust

collection system. Dust collector must provide 25 cfm or greater

airflow per inch of wheel diameter and have a filter with 99% or

greater efficiency and a cyclonic pre-separator or filter-cleaning

mechanism.

APF 10

APF 25 S 13 up to 5" wheel

S 26 or larger for > 5"

wheels

Cyclonic pre separation

and filter cleaning

mechanism standard

on all Husqvarna

extractors

(xii) Handheld

grinders for uses

other than mortar

removal

For tasks performed outdoors only:

Use grinder equipped with integrated water delivery system that

continuously feeds water to the grinding surface

OR

(when used dry)

Use grinder equipped with commercially available shroud and dust

collection system. Dust collector must provide 25 cfm or greater

airflow per inch of wheel diameter and have a filter with 99% or

greater efficiency and a cyclonic pre-separator or filter-cleaning

mechanism.

When used outdoors

When used indoors or in an enclosed area

None

None

None

None

None

APF 10

S 13 for up to 5" wheel

S 26 for up to 10" wheel

Or with “Y” adaptor to

handle 2 X 5" grinders

Cyclonic pre separation

and filter cleaning

mechanism standard

on all Husqvarna

extractors

Table 1 Tuck Pointing and Angle Grinders

25 CFM PER BLADE INCHES REQUIRED FOR HAND GRINDERS. 7" cup or wheel requires 175 cfm

5" cup or wheel requires 125 cfm



Assigned Protection

Factor (APF)

How

Husqvarna

can Help


(i) Stationary

masonry saws )

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.

When used outdoors


None

None

Water control valve

Water pumps

Air Scrubbers for indoor

use

Dust shroud and

extractors available

Table 1 Masonry Saws


• Objective data testing for MS 360 with dust shroud and extractor

• Air Scrubbers



Assigned Protection

Factor (APF)

How

Husqvarna

can Help


(ii) Handheld

power saws (any

blade diameter)





When used outdoors


None

APF 10

APF 10

APF 25

DEX water delivery

system

WT 15 battery powered

water tank

PWT 15 pressurized

water tank


use

Table 1 Power Cutters


• Objective data with K 4000 with extractor

• New K 770 Vac for dry cutting with extractor

• Battery-powered or pressurized water tanks

• Air Scrubbers

Specialty Power Cutters

CnB - wet

Ring Saw - wet

Pipe Cutting- wet Chain Saw - wet

K 770 Vac

K 4000 Vac



Assigned Protection

Factor (APF)

How

Husqvarna

can Help


(iv) Walk-behind

saws


continuously feeds water to the blade



When used outdoors


None

APF 10

None

APF 10

Adjustable water valves

Optional water pumps

for large flat saws

Water safety switches

on large flat saws

Table 1 Flat Saws

(iv) Walk-behind

saws


continuously feeds water to the blade



When used outdoors


None

APF 10

None

APF 10

Dust shrouds and

extractors for any size

Soff-Cut® saws are

standard equipment

Objective Data for Ultra

Early Entry™ sawing


use

Table 1 Flat Saws (Soff-Cut)


• Objective data testing for Soff-Cut® Ultra Early Entry™ sawing without water in “Green Zone™”

• Objective data testing for Soff-Cut® Ultra Early Entry™ sawing without water and with gas vacuum

• Objective data testing for Soff-Cut® Ultra Early Entry™ sawing without water and with propane vacuum

• Air Scrubbers

Vacuum Benefits (in addition to health)

• Reduced labor and cleanup

• Longer Blade life



Assigned Protection

Factor (APF)

How

Husqvarna

can Help


(v) Drivable saws For tasks performed outdoors only:





None

None

Water safety switches

on rider saws

Table 1 Ride-on Concrete Saws



Assigned Protection

Factor (APF)

How

Husqvarna

can Help


(vii) Handheld

and stand-

mounted drills

(including impact

and rotary

hammer drills)

Use drill equipped with commercially available shroud or cowling

dust collection system.

Dust collector must provide the airflow recommended by the tool

manufacturer, or greater, and have a filter with 99% or greater

efficiency and a filter-cleaning mechanism.



Use a HEPA-filtered vacuum when cleaning holes

None None Dust shrouds (dust

bugs)

Air Scrubbers

Extractors for single

and dual equipment

applications

Water system dust

suppression on DM 230

and DM 220 handheld

machines

WT 15 battery powered

water tank

PWT 15 pressurized

water tank

Table 1 Concrete Drills


• Air Scrubbers

• Water systems on handheld models

S 13 S 26

S 36



Assigned Protection

Factor (APF)

How

Husqvarna

can Help


(vi) Rig-mounted

core saws or

drills

Use tool equipped with integrated water delivery system that

supplies water to cutting surface.


instructions to minimize dust emissions

None None Water supply fitting

Water control valve

Dust shrouds and

extractors – dust bugs

WT 15 battery-powered

water tank

PWT 15 pressurized

water tank

Air Scrubbers

Table 1 Core Drills


• Objective data testing for DM 220 handheld drill with Dri Bits™ and vac system

• Battery-powered or pressurized water tanks

• Slurry vacs and recyclers

• Air Scrubbers



Assigned Protection

Factor (APF)

How

Husqvarna

can Help


(x) Jackhammers

and handheld

powered chipping

tools

Use tool with water delivery system that supplies a continuous

stream or spray of water at the point of impact.

When used outdoors


OR

(When used dry)

Use tool equipped with commercially available shroud or

cowling with dust collection system.

Dust collector must provide the airflow recommended by the

tool manufacturer, or greater, and have a filter with 99% or

greater efficiency and a filter-cleaning mechanism.

When used outdoors


None

APF 10

None

APF 10

APF 10

APF 10

APF 10

APF 10

Dust extractors for

handheld breakers

Dust shrouds for

handheld breakers

Air Scrubbers for

indoor use

Water systems for

dust suppression on

DXR breakers


• Air Scrubbers

Table 1 Jackhammers, Breakers



Assigned Protection

Factor (APF)

How

Husqvarna

can Help


(xvii) Heavy

equipment and utility

vehicles used to

abrade or fracture

silica containing

materials (e.g., hoe-

ramming, rock

ripping) or used

during demolition

activities involving

silica-containing

materials

Operate equipment from within an enclosed cab.

When employees outside of the cab are engaged in the task,

apply water and/or dust supressants as necessary to minimize

dust emissions

None

None

Water delivery

accessories for

breakers, Crushers

and drum rollers

Air Scrubbers

Remote control can

create more

distance from dust

source


• Air Scrubbers

Table 1 DXR

Husqvarna Dust Extractors & Slurry Vacs

Air Scrubbers – Negative Air Machines

Air Scrubber application

Neg Air Machine application

www.husqvarnacp.com

2019-02-07 Footer: Document subject 38

OSHA Dust Regulation and Husqvarna 29 CFR 192629 CFR 1926.1153 Dust and Husqvarna Dust and Husqvarna • Many Husqvarna products are a source of creating dust or slurry • RCS (respirable

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