Testing Results

MILWAUKEE TOOL
13135 West Lisbon Road • Brookfield WI 53005 • 262-781-3600
5/4/2018
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 DUST TRAP™ Drilling Shroud. Results show that the 48-03-3035/3135 SDS Plus
DUST TRAP™ Drilling Shroud is below the Permissible Exposure Limit (PEL) as described by OSHA 29
CFR 1926.1153 when used without a dust extractor, assuming it is used in accordance with manufacturer’s
instructions. Testing results and procedures are outlined below:
Unit Test
Average Holes Drilled
Average Sample
Duration (Minutes)
Average % Silica
(Quartz) in Sample
Average Respirable
Crystalline Silica
Concentration
(µg/m³)
OSHA PEL in
1926.1153
48-03-3035
39
61
9.43
40
50 µg/m³ over an 8
hour period
• All drilling was performed overhead using a Milwaukee 2715-22 M18 FUEL™ 1-1/8” SDS Plus
Rotary Hammer* and a Milwaukee 48-03-3035/3135 SDS Plus DUST TRAP™ Drilling Shroud.
• The vacuum port was tightly sealed with the vacuum port plug and no dust extractor or vacuum
was used during testing.
• The hole size was 5/8” in diameter and 3” deep.*
• Test procedure included both the drilling of holes and a method of emptying the dust shroud:
o The dust shroud was emptied every hole.
o The dust shroud was 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
**A 5/8” drill bit reflects the highest dust generating application, suggesting that other bit sizes would also be
compliant when using the Milwaukee 48-03-3035/3135 SDS Plus DUST TRAP™ Drilling Shroud.