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Air Data
There are three different types of air monitoring that take place at the Marjol
Battery Site: Real-Time (Dust) Air Monitoring, Site Perimeter (Ambient Air
Monitoring for Lead), and Co-located Lead Samples (samples for lead collected at
the same locations as the dust monitors). Read below for a description of
these different types of air monitoring. Go to the calendar at
the bottom of this page to view available air data for each day.
(Click here to go to the calendar.)
Note that on October 15, 2008, the United States Environmental Protection
Agency (USEPA) lowered the National Ambient Air Quality Lead Standard from a
quarterly average of 1.5 µg/m3 to a rolling three-month average of 0.15 µg/m3,
effective October 2009. Under the revised standard, the method of collecting the
samples has not changed. Samples are still collected every six days over a
24-hour period using the same type of equipment.
REAL-TIME (DUST) AIR MONITORING
- 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: As of Friday, November 13, 2009, excavation of
contaminated fill material is completed and all surface soils at
the Site are below the clean-up standard. Therefore, as
approved by USEPA and PADEP, real-time air monitoring was
stopped as of non-working hours on November 13, 2009.
Co-Located (PAM) Lead Sampling will now take place on a weekly
basis. Site Perimeter sampling will continue to be
conducted every six days as described below.
SITE
PERIMETER (AMBIENT AIR MONITORING FOR LEAD)
- 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.
Perimeter air sampling is conducted every six days using 6 samplers
at various locations around the perimeter of the site that run
simultaneously over a 24-hour period. 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. It generally
takes approximately 2 weeks for the results from the 24 hour high
volume air sampling to be validated and for the information to then
be posted on the web site.
For construction, two of the air monitors that were
previously located at the Site were relocated to provide additional
information for the community. One was placed just inside
the perimeter fence on Delaware Street where it is visible
to anyone driving near the Site; this provides air lead data
for residential areas adjacent to the Site. The other was
relocated to the Mid-Valley Secondary Center on February 27,
2008, as requested by Throop Borough’s Planning Agency and
Engineer. This monitor provides air lead data near the local
schools.
On August 13, 2008, we began running the downwind perimeter high volume
air samplers during weekend non-working hours (4 of the 6 samplers that run for the
24 hour sampling).
Due to the site
conditions (snow/ice covered) and because no activities are taking place at
the Site, the weekend perimeter high volume air sampling was stopped as of
December 29, 2008. The perimeter high volume air samplers continue to
be run every six days for a 24-hour period.
(Click here for a drawing
showing the locations of the high volume air samplers.)
Most
Recent 24-hour Ambient Air Monitoring
Results - results from November 8, 2009
Ambient Air Monitoring Data Summary
3nd
Quarter 2009 (Click here)
Monthly Ambient Air Monitoring Data Summary (June
2009
through October 2009) (Click here)
Historic
Ambient Air Data (Click here)
- This graph shows the range of
values for the quarter and the average for each individual sampler for each quarter.
CO-LOCATED (PAM) LEAD
SAMPLES (SAMPLES FOR LEAD COLLECTED AT THE SAME LOCATIONS AS THE DUST MONITORS
FOR BOTH WORKING AND NON-WORKING HOURS)
Air Data -
November 2009
Click on the
shaded dates (the numbers) below to view
air data available for those days. Note: Air data is
not available for the dates that are not shaded. The perimeter monitors run
every six days for 24 hours. (Click here for a drawing
showing the locations of the high volume air samplers.)
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Page Last Modified
Friday November 20, 2009 03:32:42 PM
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