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

LAUSD Proposed South Region High School #9 & Middle School #4
11-1
December 2006
Site Specific Health & Safety Plan (HASP)
11.0 FREQUENCY AND TYPES OF AIR MONITORING
Air monitoring will be used to identify and quantify airborne levels of hazardous substances.
Periodic monitoring is required during on-site activities. During work in contaminated areas,
continuous monitoring will be required. The type of monitoring and equipment to be used is as
follows:
11.1 AIR MONITORING
At this Site, measures will be taken to minimize personnel exposure and to implement protective
actions. Direct reading instruments may be used to rapidly detect flammable or explosive
atmospheres and certain gases and organic vapors. Direct reading instruments provide
information at the time of sampling, thus enabling rapid decision-making. Gases and organic
vapors will be monitored in the breathing zone and work area to determine the level of protection
required. Integrated personal monitoring (8-hour TWA) with subsequent laboratory analysis
may be warranted by site-specific conditions and is required by regulation to make an initial
determination of potential airborne exposures.
Metals, PAHs, and PCBs are not generally expected to present an inhalation hazard unless they
are present in a particulate form or contained in dust generated during field activities. Site
personnel will implement dust control measures at all times to prevent fugitive dust emissions
and exposures to dust. Dust control measures may consist of watering the site, wetting
construuction equipment (eg, buckets) lowering site speed limits, or using dust suppressants to
keep the soil moist/wet. Previous air monitoring results have shown that metals (i.e. lead) are
not a major inhalation hazard unless the metal is in the form of a fume, provided dust control
measures are implemented. However, in areas where significant levels of metals, PAHs, or
PCBs are suspected, air samples will be collected and analyzed using appropriate NIOSH or
OSHA analytical methods.
During site activities, air monitoring will be used to identify and quantify airborne levels of
hazardous substances. Continuous monitoring is required during on-site activities. The types of
monitoring and equipment to be used are identified in Table 11−1.
11.2 TYPES AND FREQUENCY OF AIR MONITORING
Prior to initiating a field task, the PM, Project Health and Safety Manager, and SHSO will
determine the type and frequency of air monitoring necessary for the scheduled work.
During field investigation activities, as shown in Table 11−1, the following instruments will be
available to conduct air monitoring as appropriate:
• PID instrument, either a Photovac MicroTIP ® or a MiniRae, or an equivalent instrument
to monitor for organic vapors (lamp with ionization potential [IP] of 10.6 electronvolt
[eV], unless the site is impacted with 1,1,1 trichloroethane [TCA] and/or other
compounds with IP over 10.6 eV. If the site is impacted with 1,1,1 TCA or any other
compounds with IP over 10.6 eV, a PID equipped with an 11.7 eV lamp will be used).
• Combustible gas indicator (multi-gas detector instrument) to measure the concentration
of combustible gases or vapors, and also toxic gasses such as hydrogen sulfide (H2S).
• Benzene and other COC colorimetric detector tubes, or chemical specific instruments.
• Personal sampling pumps with appropriate filters and/or sorbent media.
• Summa canisters
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