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 2715-DE and 2712-DE HAMMERVAC™ Dedicated Dust Extractors
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 HAMMERVAC™ Dedicated Dust Extractors. Results show that the 2715-DE and
2712-DE HAMMERVAC™ Dedicated Dust Extractors are below the Permissible Exposure Limit (PEL)
as described by OSHA 29 CFR 1926.1153 assuming they are used in accordance with manufacturer’s
instructions. Testing results and procedures are outlined below:
All drilling was performed overhead using a Milwaukee Rotary Hammer and a Milwaukee
HAMMERVAC™ Dedicated 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 5 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
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.