Table 304.1
Required Pollutant Removal Efficiencies for Infiltration
Alternatives
| |||
---|---|---|---|
Pollutant Load
|
Units
|
Required Removal Efficiency (%)
| |
Total suspended solids (TSS)
|
Pounds
|
85%
| |
Total phosphorus (TP)
|
Pounds
|
85%
| |
Total nitrate (NO3)
|
Pounds
|
50%
|
Where:
| |||
Q =
|
Peak runoff rate, in cubic feet per second (CFS).
| ||
C =
|
Runoff coefficient equal to the ratio of the peak runoff rate
to the average rate of rainfall over a time period equal to the time
of concentration.
| ||
I =
|
Average rainfall intensity in inches per hour for a time equal
to the time of concentration.
| ||
A =
|
Drainage area in acres.
|
Commonwealth of Pennsylvania
| |
---|---|
Department of Transportation
| |
Publication 584, PennDOT Drainage Manual
| |
2010 Edition (or the latest revision thereto)
|
Commonwealth of Pennsylvania
| |
---|---|
Department of Transportation
| |
Publication 584, PennDOT Drainage Manual
| |
2010 Edition (or the latest revision thereto)
|