Site-Specific Health and Safety Plan (HASP) - Laschools.org

Action levels for potential benzene contamination are as follows:
• Level D protection shall only be used when:
LAUSD Proposed South Region High School #9 & Middle School #4
10-4
December 2006
Site Specific Health & Safety Plan (HASP)
− Total organic vapor readings on the PID are between 0 to 5 ppm above background,
and benzene concentration is less than 0.5 ppm.
• Level C protective ensemble must be donned when:
− Total organic vapor readings in the breathing zone are 5 to 100 ppm above
background for 30 seconds.
− Benzene concentration as determined by colorimetric tube monitoring is between 0.5
to 5.0 ppm. Confirmation sampling using personal sampling pump and charcoal tube
is required to determine the actual presence and concentration of benzene.
If total organic vapor readings in the breathing zone exceed 100 ppm for 30 seconds or more
and/or the benzene Dräeger ® tube reading exceeds 5.0 ppm benzene, the SHSO will stop work
and re-evaluate site conditions.
If background information and planned site activities indicate a potential for significant levels of
metals, PAHs, pesticides, or PCBs to be generated at the site, and dust control measures cannot
be implemented during field activities, particulate monitoring will be conducted utilizing a real
time monitor, such as a MiniRam. The action levels noted in Table 10-2 are based on half of the
Cal/OSHA PEL for respirable dust (particulates). These action levels may be amended on a sitespecific
basis depending on the COC, concentration, activities, etc. Any such site-specific
amendment will be noted in the addendum to the HASP. Air samples will be collected using a
personal sampling pump and appropriate filters to determine specific chemicals of concern.
Concentration of
Particulates
(Sustained for > 1 min.)
Table 10-2
Action Levels for Particulates
Level of
Respiratory Protection
Responses
0 - 2.5 mg/m 3 Level D Stay upwind from the
source/area of COCs;
implement dust control
2.5-5 mg/m 3 Level C Stay upwind from the
source/area of COCs;
implement dust control
>5 mg/ m 3 To be determined by the PM
based on additional monitoring
data/evaluation
Stop work, evacuate the site,
and consult the PM for further
evaluation.
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