What are the Alabama SWPPP and NPDES Permit Requirements?

Everything you need to know to remain in compliance and keep your project on track

Navigating environmental regulations can be challenging, but understanding compliance requirements is critical for successful project execution. In Alabama, this includes adhering to the Alabama Department of Environmental Management (ADEM) NPDES General Permit ALR100000 and developing a comprehensive Stormwater Pollution Prevention Plan (SWPPP). This article provides an overview of SWPPP requirements, NPDES permit compliance, and the process for submitting a Notice of Intent (NOI) with ADEM for stormwater permit coverage.

What is a Stormwater Pollution Prevention Plan (SWPPP)?

A SWPPP is a site-specific document that outlines strategies and practices to prevent pollutants from contaminating stormwater runoff. The primary goal of the SWPPP is to minimize the impact of construction and industrial activities on local water bodies by controlling sediment, erosion, and other potential pollutants from leaving the construction site.

Who Needs a SWPPP in Alabama?

In Alabama, any construction activity disturbing one acre or more of land must develop a SWPPP as part of obtaining coverage under the NPDES General Permit for Stormwater Discharges from Construction Activities ALR100000. Smaller projects that are part of a larger common plan of development that cumulatively disturb an acre or more are also subject to these requirements. For all projects under one acre of land disturbance, a SWPPP and the related permit coverage are generally not required.

Key Components of a SWPPP

A compliant SWPPP must include the following elements:

• Site Description:

  • Location and size of the project.

  • Description of construction activities.

  • Identification of potential pollutant sources expected to be kept onsite.

• Erosion and Sediment Controls:

  • Detailed measures to prevent soil erosion and sediment discharge, such as silt fences, sediment basins, and temporary seeding. These must be included in narrative form and outlined on a map of the site.

• Good Housekeeping Practices:

  • Proper waste management, material storage, and spill prevention practices and procedures to reduce the risk of materials discharging from the site.

• Inspections and Maintenance:

  • Daily site inspections are required per the permit, however, are limited in scope to a brief overview of the working area and its control. Rain data must also be logged in this task.

  • Comprehensive site inspections are required to ensure that control measures are functioning correctly. Specific to Alabama, a comprehensive inspection must occur at least once a month or after a 0.5-inch rainfall event, whichever comes first.

  • Maintenance schedules for stormwater controls.

• Recordkeeping:

  • Documentation of inspections, maintenance, and any corrective actions taken.

NPDES General Permit Requirements in Alabama

The NPDES General Permit is issued by ADEM and applies to stormwater discharges associated with construction activities. To comply with this permit, operators must:

1. Prepare a SWPPP before submitting a Notice of Intent (NOI).

2. Submit a NOI to ADEM to request coverage under the NPDES General Permit.

3. Implement the SWPPP at the project site.

4. Conduct Regular Inspections and maintain proper documentation as required by the permit.

5. Submit a Notice of Termination (NOT) when construction is complete, and final stabilization has been achieved.

Understanding the Notice of Intent (NOI)

The NOI is a formal application submitted to ADEM to obtain coverage under the NPDES General Permit. Key steps in the NOI process include:

• Completing the NOI Form:

  • Provide information about the project, including location, estimated start and end dates, receiving waterbody details, presence of endangered species, and operator details.

• Submitting the NOI:

  • NOIs can be submitted electronically through ADEM’s online portal or by mailing in the required form.

• Paying the Required Fee:

  • Fees vary based on the size of the disturbed area and project type. Typically, the fee is $1,000 for most construction sites.

• Receiving Confirmation of Coverage:

  • Once the NOI is processed and approved, ADEM will issue confirmation of coverage under the NPDES permit. Typical processing time is between 7–14 business days.

Compliance and Enforcement

Failure to develop a SWPPP, submit a NOI, or comply with NPDES requirements can result in significant penalties, including fines and project delays. Regular audits and inspections by ADEM help ensure that operators adhere to the required standards.

Final Thoughts

Ensuring compliance with SWPPP and NPDES requirements is essential for protecting Alabama’s water resources and avoiding costly enforcement actions. By developing a comprehensive SWPPP, submitting the required NOI, and maintaining compliance throughout the project lifecycle, operators can ensure projects stay on time and budget.

Not sure if you have everything you need?

Contact the qualified stormwater compliance professionals at Eco Permit Pros today to check SWPPP off your to-do list!

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