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Table 6-2.Best JudgmentExposure
Thresholds for Adverse Effects Due to Sulfur Dioxide and Total
Suspended Particulates (long term)
|
Annual threshold
(μg/m3) |
| Effect |
Sulfur Dioxide
(SO2) |
Total Suspended
Particulates |
| Decreased lung function of
children |
200 |
100 |
| Increased acute lower
respiratory disease in families |
90 to 100 |
80 to 100 |
| Increased prevalence of
chronic bronchitis |
95 |
100 |
| Present standard |
80 |
75 |
|
|
(Geometric) |
| Source: John F.
Finklea, "Conceptual Basis for Establishing Standards" in National
Academy of Sciences-National Research Council, Proceedings of
the Conference on Health Effects of Air Pollutants. Prepared
for the U.S. Congress, Senate, Committee on Public Works pursuant
to S. Res. 135, 93rd Congress, 1st Session, Washington, D.C.: U.S.
Government Printing Office, 1973, p. 661. |
Table 6-3.Best JudgmentExposure
Thresholds for Adverse Effects Due to Carbon Monoxide (Short term,
8 hours)
|
Threshold
mg/m3 |
| Effect |
Rest |
Light Activity |
Exercise |
| Diminished exercise
tolerance in heart disease patients |
29 |
24 |
23 |
| Decreased physical
performance in normal adults |
71 |
59 |
55 |
| Interference with mental
activity |
50 |
41 |
39 |
| Present standard (8
hours) |
|
10 mg/m3 |
|
| Source: John F.
Finklea, "Conceptual Basis for Establishing Standards" in National
Academy of Sciences-National Research Council, Proceedings of
the Conference on Health Effects of Air Pollutants. Prepared
for the U.S. Congress, Senate, Committee on Public Works pursuant
to S. Res. 135, 93rd Congress, 1st Session, Washingtion, D.C.: U.S.
Government Printing Office, 1973, p. 661. |