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Air Data
Available for Friday, July 31, 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.
Working Hours
Note:
Air Monitor 3 had one hourly average reading recorded that was at the Action
level and two hourly average readings above the Action Level for the area it
was in (downwind of work activities in the Containment Area) during working
hours on July 31, 2009. As a result of the heavy rains again, water
got into Air Monitor 3 and it was reading abnormally high during the morning
working hours (9 and 10 a.m.). The elevated readings are believed to be due
to water that got inside the Dust Trak and not due to dust because
of the heavy rains that occurred that day preceding and during the exceedances. The
co-located (PAM) lead sample from the Air Monitor 3 location
was sent in for analysis.
(See the
Co-Located Lead Samples
section below for the result.)
Non-Working Hours
Note:
The air monitor that was put out on Friday afternoon downwind of the
Containment Area stopped working at some point prior to Saturday morning at
8 a.m. when the AGC representative was at the Site to check the monitors;
data could not be downloaded from the monitor. A new monitor was put
out to replace the one that was not working on Saturday morning at
approximately 9 a.m.
The perimeter high volume air samplers (no PAM samplers) ran
over the weekend. The samples collected from high volume air samplers #1 and
#3 were sent in for analysis in response to the air monitor having stopped
working.
(See Site perimeter monitoring below for results of this
analysis.)
Click on the
links below to view graphs showing the real-time air
monitoring data for July 31, 2009:
Working Hours Weekend
Non-Working Hours
- Site perimeter monitoring - this kind of air monitoring consists
of ambient air monitoring for lead using the high-volume sampler method,
which is what has been used for the past 20 years at the Site. This sampling
will determine if air lead is being emitted from the Site. Results with this
type of monitoring are not immediate as the air collection filters have to
be sent to a lab for analysis. The sampler draws
air over a filter and then the filter is analyzed for lead content. The
volume of air that is drawn in is also recorded which gives us the results
of micrograms (µg) of lead in cubic meters (m3) of air.
(Click here for a drawing
showing the locations of the high volume air samplers.)
Non-Working Hour Ambient Air Monitoring
Result - result from weekend July 31, 2009 to August 3, 2009
-
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 are placed at the same location as the
Real-Time (Dust) Air Monitors or along the perimeter fenceline. This sampling is in addition to what is
required by the 100% Design. The samples are 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. 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 July 31,
2009,
Working Hours
(Click here to go back to the
July 2009 calendar page.)
Page Last Modified
Thursday November 05, 2009 12:26:10 PM
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