
306 Environmental Impact Analysis
NEBA approach using nitrogen load and cost of nitrogen control as the envi-
ronmental currency.
The net environmental benet sought was a reduction in the current
15kgNday to the TMDL specied load of 12 kg N/day (Figure7.15) and the
approach should address cost per benet received. Nitrogen removal costs
0
2
4
6
8
10
12
14
WWTP
Urban
storm water
Agricultural
runo
Feed lot Total load TMDL
Nitrogen source
Average daily load (kg)
Load under BPT/NPDES
FIGURE 7.15
Nitrogen loads to green river under existing conditions and the best practical treatment under
the national pollutant discharge elimination system ...