EROSION & SEDIMENT CONTROL
NPDES PERMIT PROGRAM
Program Updates Forms & Applications Glossary & FAQ
Please be advised effective July 18, 2007, Montgomery County Conservation District will only be accepting the Notice of Intent 5/2007 version. Your package will be considered Administratively Incomplete without the newest version.
Please be advised effective April 1, 2007, Antidegradation forms are required to be submitted with all applications for Individual NPDES permits.
Erosion is a natural process by which the surface of the land is worn away by water, wind or chemical action. Accelerated erosion is the removal of the surface of the land through the combined action of human activities and natural processes at a rate greater than would occur from natural processes alone.
Montgomery County Conservation District, under a delegation agreement with the Pennsylvania Department of Environmental Protection, is responsible for reviewing Erosion and Sediment Control Plans and inspecting sites for Chapter 102 compliance. For complete guidelines, refer to the Pennsylvania Code, Title 25. Environmental Protection, Chapter 102 Erosion and Sediment Control
What is National Pollutant Discharge Elimination System (NPDES)?
The National system for issuance of permits under section 402 of the Federal Clean Water Act (33 U.S.C.A. § 1342) including a state or interstate program which has been approved in whole or in part by the Environmental Protection Agency.
| Disturbed area | Written E&S plan | E&S plan approval | NPDES Permit | PCSM Plan Submitted | PCSM Plan Approval |
|
0 - 5000 Sq. ft. |
Not required unless in HQ, or EV watershed, or other DEP permit required | Not required, but may be a municipal requirement.** |
No |
Not required, but may be a municipal requirement. | Not required, but may be a municipal requirement. |
|
5000 sq. ft to < 1 acre |
Yes |
Not required, but may be a municipal requirement.** |
No |
Not required, but may be a municipal requirement. | Not required, but may be a municipal requirement. |
|
1 to < 5 acres w/o point source to surface waters |
Yes |
Not required, but may be a municipal requirement.** |
No |
Not required, but may be a municipal requirement. | Not required, but may be a municipal requirement. |
|
1 to < 5 acres with point source to surface waters |
Yes |
Required |
Yes |
Yes |
Individual - Yes General - No* |
| 5 acres or greater | Yes |
Required |
Yes |
Yes |
Individual - Yes General - No* |
*Note: If the permitted activity is in an MS4 municipality, the municipality must ensure the approval of the Post Construction Stormwater Management (PCSM) plan. The applicant should send the PCSM plan to the MS4 municipality along with the municipal notification. Even where the approval of the PCSM plan is not required, the permittee must develop and implement the PCSM and certify that the BMPs were implemented in accordance with the PCSM plan when the Notice of Termination (NOT) is submitted.
**Although the E&S plan approval is not required under the Chapter 102 Regulations for these activities, E&S approval may be required by the municipal ordinance, or another DEP permit (i.e. - Chapter 105 Joint Permit, or GPs).
What is a Post-Construction Stormwater Management Plan (PCSM Plan)?
A site specific plan identifying Best
Management Practices (BMPs) to manage stormwater runoff after construction
activities have ended and the project site has been permanently stabilized to
protect and maintain existing and designated uses. The PCSM plan should be
designed to maximize volume reduction technologies, eliminate or minimize point
source discharge to surface waters, preserve the integrity of stream channels,
and protect the physical, biological and chemical qualities of the receiving
surface water. The PCSM Plan must contain a
written narrative, including calculations or measurements, and justifications
for each BMP.
(as of 10/21/03)
