New Impervious Area1, 2
(acreage)
|
Applicant Must Provide
| |
---|---|---|
Less than 1
|
Documentation of new impervious area3
| |
Greater than 1
|
Rate controls, volume controls and SWM site plan
|
NOTES:
| ||
---|---|---|
1
|
New impervious area since the date of adoption of this chapter.
| |
2
|
Gravel in existing condition shall be considered pervious and
gravel in proposed condition shall be considered impervious.
| |
3
|
The small project stormwater management application included
in Appendix E[1] may be used for projects under 5,000 square feet or single-family
residential projects over 5,000 square feet of new impervious surface.
The small project SWM application allows documentation of new impervious
surface, credits through disconnection of impervious surfaces and
tree planting, and sizing of volume control BMPs that may be required.
|
Pollutant Load
|
Units
|
Required Reduction
(percent)
| |
---|---|---|---|
Total suspended solids (TSS)
|
Pounds
|
85
| |
Total phosphorous (TP)
|
Pounds
|
85
| |
Total nitrate (NO3)
|
Pounds
|
50
|