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Stormwater Quality Systems

Stormwater mitigation is posing a real challenge as cities continue to expand and build, with many municipalities putting pressure on developers and contractors to help solve this problem. Our engineering team took this issue to task to provide superior cost-effective solutions and engineering assistance throughout the project life cycle.

System Capabilities

Our team ensures that the finished product complies to the most stringent specifications.



Temporarily retains rainwater until it can be released into the storm drain system

  • Water is collected from roofs, parking structures, facilities drainage, AC units, and overflow basins.
  • Collected water is processed with debris filtration and then stored until the water can be incrementally pumped and dispensed back into the municipal storm drain system.
  • SFWW Retention Vessels include IAPMO Certified Steel, HDPE, Reinforced Concrete, and Fiberglass Options.
  • SFFW Retention System Options include Filtration, Treatment, Pump Transfer, Monitoring & Recording.

Rain Harvesting

Rain Harvesting retains rainwater onsite to be reused for landscape irrigation. The rain harvesting process of collecting and storing water is the same as the detention/retention process; however, instead of being dispensed back into the municipal Storm Drain System – water is repurposed for onsite irrigation.

  • Rainwater Catchment
  • Pre-Filtration
  • Rainwater Storage Vessel
  • Pump Station & Controls
  • Integrated Irrigation Systems
  • NSF Certified Filtration/Treatment
  • System Water Replenishment

Infiltration Systems

In conjunction with horizontal leach lines for groundwater replenishing, onsite stormwater collection is routed into below grade Storage Vessels or HDPE piping. Water is slowly released back into the groundwater system.

  • Rainwater Catchment
  • Pre-Filtration
  • Rainwater Storage Vessel
  • Dissipation into Groundwater
dry well

Dry Wells

Similar to the infiltration system, but with vertical wells and filtration components

  • Scalable water volume point of collection, filtration and drainage, then back into the groundwater system.
  • Dry Wells are the most cost effective method of Stormwater collection, filtration and groundwater system dispension.
  • SFWW Dry Well Options include HDPE and Reinforced Concrete Vessels.
  • SFWW will assist engineers and recommend Basin Sizing. SFWW Dry Well Basin size ranges are available to accommodate each application.
  • Piping materials and sizes are designed per application.
modular installation

Bioclean Environmental Products

  • The Modular Wetlands® System is the first biofiltration system to receive certification as a full capture trash treatment control device.
  • Represents a pioneering breakthrough in stormwater technology as the only biofiltration system to utilize patented horizontal flow, allowing for a smaller footprint, higher treatment capacity, and a wide range of versatility.
  • Horizontal flow also gives the system the unique ability to adapt to the environment through a variety of configurations, bypass orientations, and diversion applications.
  • The Modular Wetlands® continues to outperform other treatment methods with superior pollutant removal for TSS, heavy metals, nutrients, hydrocarbons, and bacteria.
pump station

Stormwater Pump Station Systems

  • Stormwater Pump Stations are scalable, designed and built to provide onsite transfer of water through filtration into storage and final dispensing options.
  • Pump Stations can also be designed to move water through onsite irrigation processes.
  • Pump Stations typically include Storage Vessels, Pumps, Liquid Level Sensors, Piping, and Operational Controls.
  • Vessel Materials of Construction range from HDPE, RCP, Steel, or FRP.
  • SFWW Systems are engineered and designed to be self contained but also offer Accessories and Options to complement the system.
  • Please call our SFWW Engineering Group for a custom designed system.
Project Specification Santa Fe Winwater
Pre-cast Liner: Reinforced 4000 PSI concrete. 48″ I.D., 54″ O.D. with eight (8) 1.25″ diameter holes per foot where noted. 4,000 PSI – 72” OD x 60” ID with 18 ea 2” diameter holes per ft.
Manhole Cone: Pre-cast, conforming to ASTM C478 with modified flat bottom. Pre-cast – conforming to ASTM C478
Overflow Pipe: Minimum 6″ I.D. Schedule 40 Poly Vinyl Chloride (PVC) solid wall 6” ID x Sch. 40 PVC
Brackets: Formed 12 gauge steel, fusion bonded epoxy coated. Brackets: 16 Gauge 316 SS
Drainage Pipe: 100 PSI minimum PVC pipe or ADS highway grade pipe, mated to the overflow pipe with a suitable coupling. Drainage Pipe: Corrugated HDPE Highway Grade Pipe
Rings and Grates: 30″ minimum nominal metal castings conforming to TRI #2030-B Specifications. The rings and grates shall be bolted in two (2) locations and suitable for light traffic with “Storm Water Only” cast into the grating surface. Rings & Grates: Conform to TRI#2030-B Specs. Grates bolted in 2 locations and traffic rated – cast “Storm Water Only”
Rock: Clean washed rock uniformly graded between 3/8″ and 1-1/2″. Rock: 3/8” – 1-1/2” Washed
Drainage Fabric: Mirafi 140NL fabric or approved equal. Drainage Fabric: Mirafi 140NL equal
Drainage Screen: Minimum 6″ I.D., Schedule 40 PVC slotted screen with 0.120 slots continuous, with a minimum of 160 slots/foot. 96″ overall length, with a suitable coupling. Drainage Screen – Per Project Specs
Debris Shield: Rolled 16 gauge steel x 24″ length, with rolled 16 gauge x .265″ maximum short way opening (SWO) flattened expanded steel internal screen x 12″ length. Fusion bonded epoxy coated. Equipped with anti-siphon vent, and screen. Debris Shield: Rolled 16 Gauge 316SS with 5MM Perforations – 51% Open Area w/integral anti-siphon vent/screen
Moisture Membrane: Polyethylene liner with 6 mil. thickness, conforming to ASTM D-2103. Moisture Membrane: Per ASTM D-2103
Absorbent: Hydrophobic petrochemical sponge with minimum four (4) quart capacity used in all main well and inlet chambers. Absorbent: 6 Gal Capacity (Industry Leader)
Interceptor/Existing Well Connecting Pipe shall be four-inch I.D. Schedule 40 PVC solid wall pipe, with screened inlet and flow regulator. Conveyance Pipe – 4”-6” PVC Sch. 40
Trench Backfill / Chamber Encasement: Connecting pipe trench backfill and stabilizing envelope around chambers shall be two (2) sack ABC concrete slurry, extending from trench bottom to beneath asphalt paving for the entire trench length including the annular space around the well chambers; areas surrounding the upper ortion of the interceptor and drywell chamber shall also be backfilled with slurry. Trench Backfill / Chamber Encasement: Minimum Per Specifications
Concrete/Pipe Connections: All pipe inlets in pre-cast liner or concrete structure shall be sealed with Speed-Crete or approved equal. Connecting pipe should not exceed 4″ in diameter for single-chambered wells, or 24″ for dual-chambered systems. RCP Connections sealed with Speed-Crete – Connecting pipe per spec.

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