Testing Results

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 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 below combination, assuming it is used in accordance with manufacturer’s
instructions. Testing results and procedures are outlined below:
Unit Tested
Average
Sample
Duration
% Silica
(Quartz) in
Sample
Average Respirable
Crystalline Silica
Concentration (μg/m³)
OSHA PEL in
1926.1153
61
39
5 μg/m³ TWA
50 μg/m³
• All chiseling was performed using a Milwaukee 8 Gallon Dust Extractor (8960-20) paired with the M18™
FUEL™ 1-9/16” SDS Max Rotary Hammer Drill (2717-20), SDS Max Bull Point 18” Concrete Chisel (48-62-
4077), and SDS Max Chisel Boot (5318-DE)
• The chiseling was completed in a downward orientation to concrete at foot level
• Vacuum was turned to auto-cleaning, ON and power level was turned to HIGH
• Concrete blocks were poured from a 5000 PSI concrete mix.
• The room size was 12’9” x 26’5” x 8’
• The room where each testing was conducted was closed with no ventilation.
• The room surfaces were wiped down between trials to ensure accurate measurements
• 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 Gilian 10i air sampling pump. 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 minute (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 flat the grinder is held,
the condition of the shroud brush, the silica content of the concrete, how much grinding was done when the
shroud is not on a full, flat surface, the presence of other respirable silica dust generating activities in the area,
how often the user knocks collected dust from the HEPA filter, how aggressively the HEPA filter is knocked off
and how the vacuum is cleaned could affect actual user exposures.
• SDS Max Bull Point 18” Concrete Chisel reflects the highest dust generating application used in this test, any
smaller sizes chisels suggest based on volume of dust would also be compliant when using the 5318-DE SDS
Max Chisel Boot