DSHW-2003-009122 - 0901a068801879b5

Am ALUANT TECHSYSTEMS
March 24, 2003
8800-FY03-IH/DRT-174
ATK Thiokol Propulsion
P.O. Box 707
Brigham City, UT 84302-0707
Tel [phone]
Fax [phone]
TO:
CC:
FROM:
SUBJECT:
J. C. Holladay, Environmental Services
S. E. Jew, G. E. Yates, J. P. Smith, S. R. Pi Ot
Uta h Division of Solid D. R. Trott
Industrial Safety and Hygiene
and Hazardous Waste
TRICHLOROETHYLENE VAPORS IN M-SdSTPFT
HAND DEl^RED
MAR 3 1 2003
Industrial Hygiene provided sampling of Trichloroethylene vapors in the pit at the north
end of the M-508 high bay. Area samples from the bottom of the pit were collected
during a day shift. This sampling indicates that there is some Trichloroethylene vapor
percolating through the ground and finding its way through the concrete of the pit. No
engineering or administrative changes are recommendations by Industrial Hygiene as
a result of this sampling.
Backqround and Studv
Environmental Services requested Industrial Hygiene to monitor for Trichloroethylene
at the lowest point of M-508. A chlorinated solvent plume was determined to be under
the facility, and it was hoped the air sampling would provide a handle on the scope of
the contamination. The logical choice for air sampling was at the bottom of the pit at
the north end of the M-508 high bay.
Two calibrated sampling pumps and activated charcoal sorbent tubes were used to
collect the air samples. The two pumps were used to collect concurrent samples.
Results
Sample Number Sample Length Trichioroethyiene
03-DRT-008 60 min. 0.24 ppm
03-DRT-009 56 min. 0.21 ppm
03-DRT-010 60 min. 0.21 ppm
03-DRT-011 65 min. 0.10 ppm
03-DRT-012 55 min. N.D.
03-DRT-013 60 min. N.D.
03-DRT-014 60 min. 0.08 ppm
03-DRT-016 117 min 0.19 ppm
03-DRT-017 127 min 0.15 ppm
03-DRT-018 116 min 0.04 ppm
03-DRT-019 60 min. N.D.
Exposure Limit
Trichloroethylene has an Occupational Safety and Health Administration (OSHA) 8-
hour (or 480-minute) Permissible Exposure Limit (PEL) of 50 parts per million (ppm).
These samples were not taken to ascertain occupational exposure limit
Recommendations
These levels of Trichloroethylene do not warrant any further attention from Industrial
Hygiene at this time. Employees are not routinely asked to descend into the pit where
the samples were collected.
No engineering or administrative changes are recommended as a result of sampling.
Should you have any questions, please feel free to contact me on extension 2015.
•
D. R. Trott