New Impervious Area1,2
(square footage)
|
Applicant Must Provide
| |
---|---|---|
0 to 2,500
|
No submission
| |
2,500 to 5,000
|
Documentation of impervious surfaces (small project SWM application)3
| |
>5,000
|
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 first page of the small project stormwater management application
included in Appendix E[2] may be used to document new impervious surfaces.
|
New Impervious Area1,2
(square footage)
|
Applicant Must Provide
| |
---|---|---|
0 to 1,000
|
No submission
| |
1,000 to 2,500
|
Documentation of impervious surfaces (small project SWM application)3
| |
2,500 to 5,000
|
Volume controls and small project SWM application3
| |
> 5,000
|
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[3] may be used for projects under 5,000 square feet of new
impervious surface and single-family home construction. 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
(%)
| |
---|---|---|---|
Total suspended solids (TSS)
|
Pounds
|
85%
| |
Total phosphorous (TP)
|
Pounds
|
85%
| |
Total nitrate (NO3)
|
Pounds
|
50%
|