Between the years 1990 and 2001, the annual geometric
Total Suspended Particulate (TSP)
means from the industrial site were nearly double those
at the ambient site, and exceeded the Provincial Annual
Monitoring for TSP was undertaken at both the ambient
3
AAQC of  60 µg/m  in all but one year after 1993.  In
(Patrick St) and the industrial (Bonney St.) sites.  Moni-
addition, the frequency of  exceedance of  the 24 hour
toring was suspended at the ambient site in the summer
3
was considerably higher at the
objective of  120 µg/m
of  1996.  At both sites, the levels of  TSP are observed
industrial site and mirrored the trend for the geometric
to have increased from 1992 to 1995.  At the industrial
means.  At the industrial site, maximum 24-hour values
site, the levels continued to rise, peaking during the
3
ranged from 249 to over 500 µg/m .  Reductions in the
period 1997 to 1999.  The trend in estimated PM
annual means and frequency of  exceedance of  the
emissions for Algoma Steel is very similar to the TSP
objective occurred in 2000 and 2001.  With the excep-
trends.
tion of  year 2000, data show the annual levels of  TSP in
the west end of  the city near the industrial site have
been in exceedance of  the Provincial AAQC since 1994.
TABLE 51
Three-year Summary of  Total Suspended Particles (TSP) for Bonney St., Pumphouse Location
(at present, data for Patrick St. Site not available)
3
TSP 24-hour Ontario MOE AAQC is 120 µg/m
3
TSP 1-year Ontario MOE AAQC is 60 µg/m
Station Name
1998
1999
2000
[a]
[b]
[c]
[d]
[a]
[b]
[c]
[d]
[a]
[b]
[c]
[d]
Bonney St.,
81.8
1
249
18
91.5
1
424
16
57.6
0
267
9
Pumphouse
[a]
Annual Geometric Mean
[c]
Max 24h Value
[b]
# of  times above 1 yr. AAQC
[d]
# of  times above 24h AAQC
Coarse/Inhalable Particulate (PM )
In mid-1996, measurements of  inhalable particulate
10
were undertaken at the ambient site with a TEOM
The annual geometric means at the ambient site varied
analyzer.  The annual means varied from 17 to 18.5 µg/
3
from about 14 to 20 µg/m , whereas the means at the
3
, very close to those obtained from the manual daily
m
3
industrial site varied from 24 to 37 µg/m .  The values
sampler.  There was no discernible pattern of  increas-
followed the same trend at both sites, with peak values
ing/decreasing values.  Maximum hourly averages as
recorded in 1994 and 1999.  The year-to year values were
3
high as 360 µg/m  were observed.  The number of  days
variable, especially at the industrial site and no clear
3
with 24 hour averages in excess of  50 µg/m  gradually
trend could be ascertained from the data set.
increased every year, from three exceedances in 1996 to
17 in 2001.
The frequency of  exceedance of  the Ministry’s interim
3
objective of  50 µg/m  as a 24-hour average was consid-
erably higher at the industrial site, with 10 percent to
over 40 percent of  the samples in non-conformance.
Non-conformance with the interim objective was
highest in 1999 at both sites.
57