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Table 2 Parameter estimates for de minimis individual risk emission threshold regressions for different pollutants.

From: Between-airport heterogeneity in air toxics emissions associated with individual cancer risk thresholds and population risks

Dependent Variable Independent Variables   
  Distance between nearest census block group centroid and airport centroid (km) Log annual average mixing height (m) Intercept R 2
Log benzene emission threshold (kg/year) 0.683
(<0.0001)
1.43
(0.019)
-1.65
(0.66)
0.74
Log 1,3-butadiene emission threshold (kg/year) 0.751
(<0.0001)
1.40
(0.028)
-3.23
(0.41)
0.75
Log BaP emission threshold (g/year) 0.687
(<0.0001)
1.42
(0.021)
-0.019
(0.995)
0.74
  1. P-values are listed below regression coefficients.