Proprietary Filters
Underground filtering facilities work by collecting and filtering stormwater runoff from a given site. Typically, flow splitters are used to direct a portion of untreated water—often referred to as the “first flush”—into the underground facility. The stormwater enters the facility through an underground inlet pipe, passing through filtration cartridges that remove pollutants. After filtering, the clean water is discharged through an outlet pipe, either into a downstream waterway or into the storm drain system. This process helps improve water quality by removing pollutants and returning cleaner water to the environment.
Why Are Underground Filtering Facilities Important?
Pollutant Removal
These systems remove harmful pollutants from stormwater, helping to reduce contamination in local water sources.
Improvement of Stream and River Health
By filtering out pollutants, these systems help restore the health of local streams and rivers.
Support for Recreational Water Quality
Clean stormwater helps make our waters safer for activities like swimming and fishing.
Contribution to Chesapeake Bay Health
Stormwater management systems are crucial for improving water quality and protecting aquatic ecosystems.
Why Is It Important to Maintain Underground Filtering Facilities?
Regular maintenance is essential to keep underground filtering facilities functioning properly. Without proper upkeep, these systems can face several issues:
Clogging
Over time, sediment and debris can accumulate in the filtration system, causing clogs that prevent water from being treated effectively. This can lead to sediment and pollutants entering local streams.
Filter Wear and Tear
Filters may become worn out, reducing their ability to capture pollutants. Without maintenance, the facility may not work as intended, allowing pollutants to pass through and negatively impacting water quality.
Store
Follow appropriate health and safety protocols during maintenance work.
Maintaining your underground filtering facilities ensures that they continue to operate efficiently, protect water quality, and contribute to a healthier environment.
Why Are Underground Filtering Facilities Important?
Trash, Debris, Oil & Grease, or Sediment Accumulation
Action: Remove and properly dispose of any accumulated trash, debris, sediment, oil, or grease to ensure the facility continues to function properly.
Missing Steps/Ladders
Action: Repair or replace any missing or damaged steps or ladders to maintain safe access for inspections and maintenance.
Clogged Pipes and Trash Racks
Action: Remove and properly dispose of any debris causing blockages in the pipes or trash racks to prevent clogging and ensure smooth water flow.
Clogged Filters and Standing Water for More Than 3 Days After a Rain Event
Action: Replace the filter media and/or cartridges if clogging occurs or if standing water persists for over 72 hours after a rain event. Remove accumulated debris such as leaves, sediment, and trash, either manually or with a vacuum truck, depending on the device design.
Corrosion of Metal Pipes
Action: Repair or replace any corroded metal components to prevent further deterioration and maintain system integrity.
Consider Site Conditions
Action: Repair or replace damaged structural components. For more complex repairs or replacements, consultation with the Department of Environmental Protection (DEP) may be required to determine the appropriate course of action.
By addressing these issues promptly, you help ensure that the proprietary underground filtering facility operates efficiently, removing pollutants from stormwater and maintaining proper drainage. Regular inspections and maintenance are essential to avoid system failures and protect water quality.