Testing Results

MILWAUKEE TOOL

13135 West Lisbon Road • Brookfield WI 53005 • 262-781-3600

8/7/2017

**A 5/8” drill bit reflects the highest dust generating application, suggesting that other bit sizes would also be

compliant when using the Milwaukee 2306-20/22 M12™ HAMMERVAC™ Universal Dust Extractor

29 CFR 1926.1153

Milwaukee

OSHA

Compliance Solutions

To Whom It May Concern,

Milwaukee

, in partnership with Industrial Hygiene Sciences, LLC, has conducted testing on the

Milwaukee SDS Plus M12™ HAMMERVAC™ Universal Dust Extractor. Results show that the 2306-

20/22 SDS Plus M12™ HAMMERVAC™ Universal Dust Extractor is below the Permissible Exposure

Limit (PEL) as described by OSHA 29 CFR 1926.1153 assuming it is used in accordance with

manufacturer’s instructions. Testing results and procedures are outlined below:

 All drilling was performed overhead using a Milwaukee 2713-22 M18™ FUEL™ 1” SDS Plus

D-Handle Rotary Hammer* and a Milwaukee 2306-22 M12™ HAMMERVAC™ Universal Dust

Extractor.

 The hole size was 5/8” in diameter and 4” deep.*

 Test procedure included both the drilling of holes and a method of emptying the dust box:

o The dust box on the extractor was emptied and the HEPA filter was knocked out

every 2 holes.

o The dust box and filter were knocked out lightly into a bucket placed on the ground

next to the drilling location.

 Concrete blocks were poured from a 5000 PSI concrete mix.

 The room size was 12’9” x 26’5” x 8’.

 The room surfaces were wiped down between trials to ensure accurate measurements

 Samples were analyzed using OSHA ID-142 by the Wisconsin Occupational Health Laboratory,

an AIHA Accredited laboratory. The sampling method used meets the definition of respirable

crystalline silica in 1926.1153 (a) and Appendix A of the OSHA Respirable Crystalline Silica

Standard (1926.1153).

 The Time Weighted Average (TWA) was calculated assuming zero exposure to respirable

crystalline silica for the non-sampled portion of a 480 minutes (8 hour) shift. Longer exposure

times, assuming that the dust exposures would be similar to those collected in these trials, would

likely result in higher TWAs. Factors that would affect actual user exposures include, but are not

limited to, the ventilation and air flow patterns in the work space, the presence of other respirable

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MILWAUKEE TOOL 13135 West Lisbon Road • Brookfield WI 53005 • 262-781-3600 8/7/2017 29 CFR 1926.1153 Milwaukee® OSHA® Compliance Solutions To Whom It May Concern, Milwaukee®, in partnership with Industrial Hygiene Sciences, LLC, has conducted testing on the Milwaukee SDS Plus M12™ HAMMERVAC™ Universal Dust Extractor. Results show that the 230620/22 SDS Plus M12™ HAMMERVAC™ Universal Dust Extractor is below the Permissible Exposure Limit (PEL) as described by OSHA 29 CFR 1926.
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 silica dust generating activities in the area, the frequency of and method used to empty the extractor, and the number and depth of the holes drilled.