COMPARISON OF 1996 NATA RESULTS TO MEASURED CONCENTRATIONS
IN OUTDOOR AIR IN NEW JERSEY
There are four established air toxics monitoring sites
run by NJDEP. They are located in Camden, Elizabeth, New
Brunswick and Chester. The Camden site has been measuring
several toxic volatile organic compounds (VOCs) since
1989. The Elizabeth site began measuring VOCs in 2000,
and the New Brunswick and Chester sites became operational
in July 2001. In July 2001, analysis for toxic metals
also began at all four sites.
NJDEP Air Toxics Monitoring Sites
Thirteen of the toxics measured at the Camden monitoring
site were included in the NATA study, although three of
them fell below detection limits in 1996, so there is
no measured level in that year. For the remaining 10 toxics
it is possible to compare the levels predicted by NATA
at this site to the levels that were actually measured.
The comparisons are in the figure below. It appears from
this analysis that the agreement between predicted and
monitored concentrations are remarkably good. (For the
majority of these pollutants the predicted and observed
values are within a factor of two of each other.)
Measurements
in Camden during 2000 show that levels of all these
compounds have been reduced since 1996.
Air Toxics Levels Measured in 1996
at Camden, New Jersey
Compared to NATA Predicted Levels
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