There are a few key documents that may play a role in continuous stormwater pollution prevention plan (SWPPP) management, and one of these in many cases is an SWPPP map. What exactly does an SWPPP map refer to, and what are some of the key components that are typically included?

At Silver Leaf SWPPP, we happily offer numerous jobsite SWPPP services for clients around Utah, including help with all forms of documentation and plan creation - including help with SWPPP maps whenever necessary. Here are some basics on how these maps work, what they should show, and the specific SWPPP elements that are generally included.

SWPPP Map Basics

For a given construction site, either a single map or a series of maps are usually created before work begins. These maps, referred to as the SWPPP map or plan, show all areas of the construction site where runoff and stormwater may occur.

We'll get into the specific elements these maps showcase in a bit, but first a quick word on their general approach. These maps will be created at the start of a given construction job, and will be updated after each SWPPP inspection - with each update, they should reflect the current conditions of the site. This means that if any changes are made to the site, such as new BMPs, the map must be updated to keep it current.

Basic Map Elements

From a broad standpoint, there are a few key elements that will be on the SWPPP map(s) from the start. These include:

  • Existing buildings: This refers to any existing buildings on the site that may be impacted by runoff of stormwater.
  • Topography: The topography of the site should be clearly marked, as this can help determine potential runoff points.
  • Existing vegetation: This broadly refers to any vegetation that is already present on the site, and may impact stormwater management in different ways.
  • Stormwater drainage systems: This includes catch basins, storm drains, and other related elements that exist at the site.
  • Slopes: Areas of the site that are sloping should be clearly marked, as they may impact where runoff goes.

SWPPP-Specific Map Elements

Speaking specifically to SWPPP elements, here's what will typically be included on a map:

  • Site boundaries: This refers to any physical boundaries of the construction site itself, including any fences, trees, or other barriers that may be present.
  • BMPs: All Best Management Practices (BMPs) should be clearly labeled on the map, along with their individual purpose and design.
  • Construction activities taking place in each area: It's important to show what types of activities are taking place in each part of the site, as this can impact pollution prevention or containment efforts.
  • Site access points: This refers to any common access points for construction workers and vehicles, which should be clearly marked for proper monitoring.
  • Areas of disturbance: These refer to any areas that are actively being disturbed or modified due to construction, and should be labeled as such. Over time, this area should be updated with the dates of disturbance once construction is underway.
  • Stockpiles: Any stockpiles of materials such as soil, gravel, or sand should be marked on the map, and updated with details on stock levels over time.
  • Surface waters (including wetlands): Any watersheds, rivers, streams, or other bodies of water should be clearly marked and monitored closely. In addition, boundaries of natural buffers around surface waters should be noted.
  • Non-stormwater activities: Any areas of the site where non-stormwater activities take place should be noted, including any specific details on these activities.
  • Drainage patterns: Specific drainage patterns should be detailed, including any information on existing or projected flow directions.
  • Points of discharge: Any points of discharge from the site where stormwater may exit should be clearly marked on the map.
  • Sensitive areas: Any areas of the site that are particularly sensitive to runoff or stormwater should be noted, such as near bodies of water.
  • Location pollutants: Specific location of pollutants should be noted, either from existing sources or potential future ones.
  • Storage: Any areas of the site where stormwater is being stored for reuse should be detailed, such as in tanks or reservoirs.
  • Support activities: Any related activities that may be taking place at the site should also be noted, such as fueling stations or equipment maintenance.

An SWPPP map is a vital document for any construction project, detailing each area of the site and all elements that are important to stormwater pollution prevention. By understanding these key components and keeping the maps up-to-date, you can help ensure that your jobsite is compliant with all SWPPP-related regulations.

Here at Silver Leaf SWPPP, we offer a number of services to help maintain your Utah jobsite's SWPPP maps and plans - from initial mapping to regular updates, our experienced team will make sure all elements are properly labeled and monitored for compliance with the necessary regulations. Contact us today to learn more about how our SWPPP services can help you!

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