1. 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

2. 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

3. 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

4. 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:

5. LID Regulatory Hierarchy

6. Surface Infiltration: ChamberMaxx

7. Surface Infiltration: Grass Paver

8. 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

9. Subsurface Infiltration: CDS and Perf Pipe

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

11. 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

12. Rainwater Harvesting

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

14. 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

15. McNichols Office Bldg. – Roanoke, VA

16. Sub-Surface Filtration: StormFilter

17. StormFilter Vault

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

19. Filtration and Infiltration

20. Treatment and Detention Volume Storage Treatment Chain

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

22. Questions??? Derek Berg E: dberg@conteches.com Ph: 207-885-9830