MILWAUKEE TOOL
13135 West Lisbon Road • Brookfield WI 53005 • 262-781-3600
To Whom It May Concern,
Milwaukee®, in partnership with Industrial Hygiene Sciences, LLC, has conducted testing on the Milwaukee M18™
FUEL™ PACKOUT Wet/Dry Vacuum (0970-20) with HEPA filter paired with the M18™ FUEL™ 1-9/16” SDS MAX
Rotary Hammer (2717-20), 18” SDS MAX Bull Point Chisel (48-62-4077), and 1-1/8” SDS Max Chisel Boot (5318-DE).
Results show that the user will be below the Permissible Exposure Limit (PEL) as described by OSHA 29 CFR 1926.1153
when using the above combination, assuming it is used in accordance with manufacturer’s instructions. Testing results
and procedures are outlined below:
Units Tested
• All chiseling was performed using a Milwaukee M18™ FUEL™ PACKOUT Wet/Dry Vacuum (0970-20) with
HEPA filter paired with the M18™ FUEL™ 1-9/16” SDS MAX Rotary Hammer (2717-20), 18” SDS MAX Bull
Point Chisel (48-62-4077), and 1-1/8” SDS Max Chisel Boot (5318-DE).
• The chiseling was completed in a 4’ X 4’ X 8” Concrete Block located on the floor.
• The concrete blocks were poured from a 5000 PSI concrete mix.
• A new HEPA filter and clean box were used for each trial.
• The HEPA filter was knocked into a garbage can after every 10 minutes of work. The vacuum box was not
emptied.
• The vacuum was turned to low speed.
• The trials were performed in an enclosure with no outside air ventilation. Ambient air cleaner with HEPA
filtration was used between each trial.
• Samples were collected on 3-piece 37 mm diameter preweighed PVC filter mounted in a BGI GK2.69 respirable
dust sampler, run at 4.2 lpm and connected to a GilAir Plus air sampling pump. The flow rate through the
sampling train was measured using a TSI 4146 Calibrator before and after each Trial. A field blank was submitted
with each day’s set of samples.
• 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, including, but not
limited to, the ventilation and air flow patterns in the space where the work is done, how the tool is used, how
sharp the blade is, the user’s technique, the silica content of the cement board, how many cuts are made, the
presence of other respirable silica dust generating activities in the area, and vacuum maintenance could affect
actual user exposures.
Average
Sample
Duration
60 minutes
% Silica
(Quartz) in
Sample
17.5%
Average Respirable
Crystalline Silica
Concentration (µg/m³)
10.8 µg/m³ TWA
OSHA PEL in
1926.1153
(µg/m³)
50 µg/m³
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