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Air Data
Available for Tuesday, June 9, 2009
- Real-Time air monitoring (Near Field Zone monitoring) - this type of air
monitoring will determine if dust is migrating outside of the
immediate work area so that additional dust control measures can be
implemented before any dust can move off-site. This
monitoring will consist of continuous, real-time dust
monitoring upwind and downwind of the work zone during all
phases of work with potential for significant release of dust (i.e.,
during soil excavation, backfill, waste placement, and cap
installation.) Real-Time monitoring provides immediate
information on the amount of dust (not just lead) being generated.
Note: Due to a change in primary wind direction, the
real-time air monitors were relocated mid-day during working
hours, therefore, there are two different sets of data for
Working Hours on June 9, 2009.
Air Monitor 3 had an hourly average reading recorded that
was above the Action Level for the area it was in during the
morning Working Hours. The
co-located (PAM) lead sample from the Air Monitor 3 location
was sent in for analysis.
(See the Co-Located Lead Samples information below.)
Click on the
links below to view graphs showing the real-time air
monitoring data for June 9, 2009:
Morning Working Hours Afternoon
Working Hours
Non-Working Hours
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Co-Located Lead Samples -
this type of air
monitoring consists of air monitoring for lead using personal air monitors (PAMs).
For this monitoring, the PAMs were placed at the same location as the
Real-Time (Dust) Air Monitors. This sampling is in addition to what is
required by the 100% Design. The samples were analyzed by a method
that provides a detection limit similar to the detection level that is used
for the perimeter high volume air samplers. This allows us to compare the
co-located sample results with the results that we obtain every six days
from the perimeter high volume air samplers. Initially, the data from the
co-located samples was used to compare with the information being obtained
from the dust monitors. The co-located samples are also helpful in
providing data when exceedances occur at one of the dust monitors.
The real-time dust monitors are moved around on a daily basis based on the
location of work activities for the day; the co-located samples are located
with the dust monitors each day. Click below to view data for June 9,
2009,
Working Hours
(Click here to go back to the
June 2009 calendar page.)
Page Last Modified
Tuesday March 02, 2010 02:45:55 PM
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