Hydrodynamic Separator

Stormwater Management

Hydrodynamic Separator Maintenance Services

CMS provides hydrodynamic separator stormwater maintenance services across North Carolina for commercial developments, parking lots, and municipal drainage systems. Hydrodynamic separators remove sediment, trash, and floatable pollutants from stormwater runoff using vortex separation technology. Over time, captured sediment and debris accumulate in the unit and reduce treatment capacity. CMS crews inspect and clean hydrodynamic separators to restore pollutant removal performance. Routine maintenance ensures these systems continue operating effectively and remain compliant with stormwater requirements.

Hydrodynamic Separator Maintenance Notes

Hydrodynamic separators require periodic cleaning to remove captured sediment and debris. CMS maintenance programs focus on vacuum removal of accumulated material and inspection of internal components. Preventive maintenance helps maintain treatment performance and prevent bypass.

Maintenance Tasks

Vacuum removal of sediment and debris
Inspect internal chambers and baffles
Inspect inlet and outlet pipes
Remove floatable trash and oil buildup
Inspect structural components
Monitor sediment accumulation levels

Hydrodynamic Separator Inspection Services

CMS performs hydrodynamic separator inspections to evaluate sediment levels and structural condition. Inspectors verify that internal baffles and flow structures remain functional. Inspection reports help determine cleaning schedules and maintenance needs.

Hydrodynamic Separator Repair Services

CMS repair crews address structural damage, inlet failures, and internal component issues. Repairs may include chamber cleaning, structural repair, or component replacement. These services restore treatment efficiency and system performance.

Hydrodynamic Separator Frequently Asked Questions

What is a hydrodynamic separator?
It is a stormwater treatment device that removes sediment and debris using vortex separation.

How often should hydrodynamic separators be cleaned?
Most systems require inspection annually and cleaning when sediment accumulation reaches manufacturer limits.

Does CMS clean hydrodynamic separators?
Yes. CMS performs vacuum cleaning, sediment removal, and system inspections.

What happens if separators are not maintained?
Sediment buildup can reduce treatment performance and cause system bypass.

Where are hydrodynamic separators commonly used?
They are frequently installed in parking lots, commercial developments, and urban drainage systems.

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Underground SCM Maintenance, Repairs, and Inspections

Stormwater Maintenance – Underground SCM Devices

Routine maintenance of underground stormwater control measures (SCMs) such as vaults, pipes, and chambers ensures these systems continue to manage runoff and treat water effectively. Services include sediment removal, debris clearing, and monitoring for blockages to maintain proper hydraulic performance. CMS provides scheduled maintenance programs throughout North Carolina to protect system functionality and prevent costly failures.

Compliance, Longevity & Sustainability:
Regular maintenance helps property owners meet NC DEQ and local stormwater permit requirements by keeping systems fully operational. Preventing sediment buildup and minor damage extends the service life of underground SCMs. Well-maintained systems improve water quality, manage runoff efficiently, and support long-term environmental sustainability.

Technician performing maintenance on an underground stormwater control measure (SCM) vault, removing sediment and debris.

Underground stormwater detention system providing flow control and treatment at a space-constrained site

Stormwater Repairs – Underground SCM Devices

Underground SCM repairs address structural damage, clogged pipes, damaged vaults, or eroded chambers that compromise system performance. Timely repairs restore full hydraulic capacity and ensure water quality treatment goals are met. CMS offers targeted repair solutions to return underground systems to optimal operation while minimizing disruption to surrounding properties.

Compliance, Longevity & Sustainability:
Prompt repairs ensure systems remain compliant with regulatory requirements and avoid penalties. Restoring structural integrity protects the long-term durability of the underground infrastructure. Efficient repairs reduce material waste, extend asset life, and maintain sustainable stormwater management practices.

Stormwater Inspection – Underground SCM Devices

Professional inspections of underground SCMs include structural evaluations, sediment and debris assessments, and hydraulic performance checks. Regular inspections identify developing issues such as clogs, damage, or decreased flow before they escalate into major problems. CMS provides detailed inspection reporting to support maintenance planning and regulatory documentation requirements.

Compliance, Longevity & Sustainability:
Routine inspections demonstrate due diligence and help property owners comply with NC DEQ and local stormwater regulations. Early detection of deficiencies reduces long-term repair costs and maximizes the lifespan of underground assets. Properly inspected systems ensure continued pollutant removal, efficient runoff management, and environmentally responsible operations.

CCTV camera inspecting the interior of an underground stormwater control measure (SCM) vault for blockages and structural issues.

Underground Stormwater SCMs

Underground stormwater SCMs, including detention vaults, chamber systems, infiltration trenches, and sand filters, provide high-capacity stormwater storage and treatment while preserving valuable surface space on commercial and industrial sites. Routine stormwater inspection, sediment removal, and structural maintenance are critical to ensure underground stormwater systems operate efficiently, prevent blockages, and remain compliant with stormwater management requirements.

Catch Basins
CMS maintains catch basins by removing sediment and debris, inspecting grates and structures, and ensuring proper drainage to keep stormwater systems functioning effectively.

Hydrodynamic Separators
CMS performs maintenance on hydrodynamic separators including vacuum cleaning, sediment removal, inspection of internal components, and debris extraction to maintain stormwater pollutant removal efficiency.

Infiltration Trenches / Infiltration Systems
CMS maintains infiltration trenches and systems by removing sediment buildup, inspecting inlets, restoring infiltration capacity, and ensuring proper stormwater drainage and groundwater recharge.

Proprietary Filtration Devices (e.g., StormFilter)
CMS maintains proprietary filtration devices such as StormFilter systems through cartridge replacement, sediment removal, system inspection, and routine servicing for optimal stormwater treatment.

Rainwater Harvesting Systems
CMS provides maintenance for rainwater harvesting systems including tank inspection, debris removal, filter cleaning, and pump checks to ensure efficient stormwater reuse.

Sand Filter Systems (Underground)
CMS performs maintenance on underground sand filter systems including sediment removal, filter media inspection, confined-space cleaning, and structural checks to maintain treatment performance.

Storm Sewer Systems
CMS maintains storm sewer systems through pipe inspection, debris removal, jetting, and structural repairs to ensure reliable stormwater conveyance and drainage.

Stormwater Chamber System
CMS maintains stormwater chamber systems through sediment removal, inlet inspection, vacuum cleaning, and structural evaluation to preserve underground stormwater storage capacity.

Underground Detention Pipe Systems (CMP/HDPE)
CMS performs maintenance on underground detention pipe systems by inspecting pipes, removing sediment buildup, cleaning inlets, and ensuring proper stormwater storage and flow.

Underground Detention Vaults (Concrete)
CMS maintains underground concrete detention vaults through sediment removal, structural inspection, debris clearing, and confined-space cleaning to ensure effective stormwater storage.