Design the system.
Not just the device.

A stormwater treatment train is a sequence of complementary practices or devices arranged so each stage performs a specific function. A typical sequence may include pretreatment for trash and sediment, biofiltration for water quality, underground storage or infiltration for volume management, and controlled release or monitoring.

Pretreatment captures trash, debris, floatables, gravel, and sediment before they reach the downstream treatment media. Keeping that material upstream can reduce clogging, simplify maintenance, preserve infiltration performance, and extend the useful life of the downstream practice.

Yes. PRETX and PRETX-LT are designed to intercept sediment, trash, debris, and floatables before runoff enters downstream green infrastructure. They can be evaluated upstream of traditional bioretention, rain gardens, bioswales, or other landscaped treatment systems.

FocalPoint serves as a high-performance biofiltration stage. It combines engineered biofiltration media with a modular underdrain and can be paired with upstream pretreatment, expanded underground storage, infiltration, detention, reuse, or controlled discharge.

Yes. FocalPoint can be designed with an expanded modular underdrain or connected to underground detention, retention, infiltration, or reuse systems. The final configuration depends on site hydraulics, elevations, soils, storage needs, and regulatory requirements.

Kai Pono provides shallow curb-line pretreatment that captures trash, sediment, and selected pollutants before runoff reaches FocalPoint. FocalPoint then provides compact engineered biofiltration downstream. The pairing keeps first-stage maintenance accessible while protecting downstream treatment capacity.

No. Some projects need only pretreatment and water-quality treatment. Others require detention, retention, infiltration, reuse, or controlled release. The treatment train should be assembled around the site and performance criteria rather than a fixed list of components.

Yes. smartPOND can be evaluated where active detention, batch treatment, optimized release, monitoring, or adaptive control is needed after upstream treatment and storage. Its role is project-specific and should be coordinated with the engineer of record.

Yes. Retrofit treatment trains can combine inlet pretreatment, compact biofiltration, underground storage, infiltration, or controls within existing infrastructure constraints. Available grade, utility conflicts, access, and bypass conditions are critical design inputs.

Selection and sizing begin with tributary area, design flow, pollutant targets, inlet and outlet elevations, available footprint, soils, groundwater, storage requirements, bypass routing, maintenance access, and applicable local criteria. Convergent works with project teams to evaluate the appropriate sequence and technical documents.

A well-designed treatment train places the material that is easiest to capture at an accessible upstream location. This can shift frequent sediment and trash removal away from downstream media, underground storage, or other systems that are more difficult and costly to restore.

Depending on the selected components and verified performance basis, treatment trains may address trash, gross debris, sediment, total suspended solids, nutrients, hydrocarbons, metals, bacteria, and other site-specific pollutants. Claims and media selections should be supported by current testing, approvals, and project-specific engineering.