3
Standard (CWS) of  30 µg/m .  In 2001, the mean was
Fine/Respirable Particulate (PM )
2.5
3
13.3 µg/m , the maximum one hour value was 191 µg/
3
3
m , the maximum 24-hour reading was 53 µg/m  and 24
Respirable particulate levels in the year 2000 at the
days were above the proposed CWS.  These results were
3
, a
industrial site had an annual mean of  11.1 µg/m
among the highest in the province and show a signifi-
3
, a maxi-
maximum 1-hour measurement of  170 µg/m
cant impact on the levels of  respirable particulate in that
3
mum 24-hour value of  55 µg/m  and 22 days (24-hour
part of  the city.
period) above the pending 24-hour Canada-Wide
TABLE 52
Three-year Summary of  Respirable Particles (PM )
2.5
3
PM  24-hour proposed Canada-Wide Standard - 30 µg/m
2.5
Station Name
1999
2000
2001
[a]
[b]
[c]
[a]
[b]
[c]
[a]
[b]
[c]
Bonney St.,
0
174
25.8
32
178
59.1
24
191
53
Pumphouse
3
)
[a]
Number of  times above 24h CWS
[c]
24h-max  (µg/m
3
[b]
1h-max (µg/m )
Carbon tetrachloride
2.5.2
Selected Hazardous Air Pollutants
3
24-hour (Provincial) AAQC is 2.4 µg/m
Volatile Organic Compounds (VOCs)
At both sites, the VOC cartridges were analyzed for this
substance starting in 1994.  The annual means at the
Benzene
industrial site (Bonney St.) varied from 0.28 to 0.66 µg/
No Provincial AAQC
3
m , whereas those at the ambient site (Patrick St.) were
3
similar and varied from 0.39 to 0.54 µg/m .  There was
At the ambient site (Patrick St. site), the annual mean
no discernible upward/downward trend with time.  The
benzene values were rather constant, varying from about
3
maximum value at both sites was slightly over 1.0 µg/m
3
1.5 to over 3.0 µg/m .  These levels are quite common in
during the monitoring period reported.  This is below
urban centers due to the impact from transportation and
3
the provincial objective of  2.4 µg/m  which was lowered
area sources.
3
from 600 µg/m  in 2001.
At the industrial site (Bonney St. site), the annual mean
benzene values were considerably higher (from 5.6 to
Semi Volatile Organic Compounds
3
over 15 µg/m ) and more variable presumably due to the
impact of  emissions from the Algoma Steel facilities.
Benzo(a)pyrene (BaP), a Polycyclic Aromatic Hydrocar-
Both sites showed higher mean values during the period
bon (PAH), was one of  the IJC Board’s chemicals of
1995 to 1997.  At the industrial site (Bonney St. Site), 24
highest concern relative to direct inhalation.
3
3
hour values over 30 µg/m  and as high as 60 µg/m  were
measured.
3
Ontario MOE Annual Mean AAQC is 0.00022 µg/m
(for single source)Ontario MOE 24-hour AAQC is
The VOC emissions inventory for the Algoma Steel Inc.
3
0.0011 µg/m  (for single source)Ontario MOE Annual
facilities show a similar pattern with increasing emissions
3
Mean AAQC is 0.0003 µg/m  (for all sources)
during the 1995 to 1997 period followed by substantially
reduced values as of  1998.
Both sites recorded higher annual means in 1993 and
1994, followed by a substantial reduction the following
58