Sustainable Development: Practical Solutions to Real World Problems Fishkill, NY November 7, 2012 Low Impact Development and Rainwater Harvesting Solutions for the Urban Environment Derek Berg Regulatory Manager CONTECH Engineered Solutions

What is Low Impact Development? Photo: Seattle SEA Streets Project Design philosophy for managing stormwater Mimic predevelopment hydrology (modeled after nature) Reduce, infiltrate, re-use, evaporate, filter, detain runoff close to its source

5 Principles of LID 1.Conserve natural areas 2.Minimize development impact on hydrology 3.Maintain runoff rate and duration from the site 4.Use integrated stormwater management practices 5.Implement pollution prevention, proper maintenance and public education programs

Updated NYS Stormwater Standards 1.Site planning to preserve natural features and reduce impervious cover 2.Calculate of the water quality volume 3.Incorporate green infrastructure and standard SMPs with Runoff Reduction Volume (RRv) capacity (Infiltration, rainwater harvesting, porous pavers) 4.Use standard SMPs, where applicable, to treat the water quality volume not addressed by green infrastructure techniques and standard SMPs with RRv capacity (biofiltration, filtration) 5.Design volume and peak rate control practices where required. (Detention) 5 Step Design/Planning Process:

LID Regulatory Hierarchy

Surface Infiltration: ChamberMaxx

Surface Infiltration: Grass Paver

Sub-Surface Infiltration Retention Maintain predevelopment hydrology Preserve Land Area Pretreatment Recommended Detention Traditional Design Practice Conditions not suitable for infiltration Reduce Runoff Rate Metal Plastic Concrete

Subsurface Infiltration: CDS and Perf Pipe

Turnkey Rainwater Harvesting Solutions Rainwater Harvesting Above ground storage Below ground storage – Metal – Steel Reinforced Polyethylene – Concrete Pump, Treatment, Control Systems Complete Systems

Conservation FocusStormwater Focus Primary GoalReduced municipal demand Eliminate runoff (pollution prevention) Secondary Benefits Reduce SW Runoff, Energy, CO 2 Conservation, Energy, CO 2 Catchment AreaMaximize, to Increase Supply Minimize, to Reduce Supply Water UsageMinimize and ConserveFind Reuse Applications Seasonal Challenge Dry Season – not enough rain Wet Season – too much rain Cistern GoalKeep it fullEmpty it quickly Economic ROI Negative – “external costs” not included in market price of water Positive – best LID solution in many cases 11 Rainwater Harvesting – Two Perspectives

Rainwater Harvesting

UrbanGreen™ BioFilter Innovative tree box filter design Incorporates bioretention & media filtration Combines biological, chemical & physical treatment processes

Operation – Increasing Flow UrbanGreen BioFilter 3 4 Two stage treatment: –Low flows treated by biofiltration –Higher flows treated by cartridge based media filtration Two 27” StormFilter cartridges Cartridges treat 22.5 GPM each

McNichols Office Bldg. – Roanoke, VA

Sub-Surface Filtration: StormFilter

StormFilter Vault

PhosphoSorb™Perlite CSF ® Leaf Media ZPG Sediments ■■■■ Oil and Grease ■■■■ Soluble Metals ■■■ Organics ■■ Nutrients ■■■■ Total Phosphorus ■ StormFilter Media

Filtration and Infiltration

Treatment and Detention Volume Storage Treatment Chain

UrbanGreen Building Blocks VortSentry ® VortSentry ® HS Hydrodynamic Separation Stand Alone Treatment – Redevelopment – Retrofit LID Pretreatment IMP – Surface Infiltration – Subsurface Infiltration – Rainwater Harvesting

Questions??? Derek Berg E: Ph: