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

Concentration of
Organic Vapors
(In the Breathing
Zone)
0 to 1 ppm total VOCs
above background
(using PID)
1 ppm to 5 ppm total
VOCs above
background
(using PID)
0.5 ppm to 5 ppm of
benzene
(using Dräeger ® tube)
5 – 100 ppm total
VOCs above
background
(using PID)
> 100 ppm total VOCs
above background
(using PID) or
5 ppm benzene
(by Dräeger ® tube)
LAUSD Proposed South Region High School #9 & Middle School #4
Table 10-1
Action Levels for VOCs
Level of
Respiratory
Protection
10-3
December 2006
Site Specific Health & Safety Plan (HASP)
Responses
and
Air Monitoring Requirements
Level D Stay upwind from the source/area of COC.
Level D or C Stay upwind from the source/area of COC.
Conduct benzene Dräeger ® tube monitoring to
confirm the absence of this COCs. If presence of
benzene is detected above 0.5 ppm, upgrade to
Level C respiratory protection and follow
responses described below (0.5 to 5 ppm of
benzene [using Dräeger ® tube]). Maintain 15
minute exposure > 2.5 ppm at all times.
Level C Stay upwind from the source/area of COC.
Conduct benzene Dräeger ® tube monitoring every
15 minutes. Confirm its presence and
concentration using personal air sampling
pumps/charcoal tube. At 5-ppm benzene on the
Dräeger ® Level C
tube, stop work and consult the PM.
Stay upwind from source/area of COC; continue
benzene Dräeger ® tube monitoring if the presence
of this COC is found and conduct personal air
sampling pumps/charcoal tube sampling to
determine adequacy of respiratory protection.
NA Stop work, evacuate the site, and consult the PM.
When the total organic vapor concentration exceeds 1 ppm above background for 30 seconds
within the breathing zone, benzene colorimetric tube monitoring will begin. If benzene is
detected above its action level, all requirements of Cal/OSHA Benzene Standard, Title 8, CCR,
Section 5218 will be implemented. All air readings will be collected in the breathing zone to
determine the level of protection.
231