Rainwater Harvesting Solution Guide

ENGINEERED SOLUTIONS

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UrbanGreen™ Stormwater Solutions from Contech®

Selecting the Right Stormwater Solution Just Got Easier... It’s simple to choose the right low impact development (LID) solution to achieve your runoff reduction goals with the Contech UrbanGreenTM Staircase. First, select the runoff reduction practices that are most appropriate for your site, paying particular attention to pretreatment needs. If the entire design storm cannot be retained, select a treatment best management practice (BMP) for the balance. Finally, select a detention system to address any outstanding downstream erosion.

© 2013 Contech Engineered Solutions LLC

Learn more about all of our stormwater

technologies at www.ContechES.com/urban gre e n

LID strives to eliminate runoff by reducing impervious area and infiltrating wherever practical. If your site has high groundwater, soils with low permeability, bedrock, or other limiting conditions, infiltration alone may not provide enough runoff reduction to meet regulations. That’s when rainwater harvesting is an important tool to help meet runoff reduction requirements.

With the UrbanGreen Rainwater Harvesting System, you have all the components to build an efficient and effective water re-use or runoff reduction integrated management practice. Our fully integrated system

UrbanGreen™ Rainwater HarvestingRainwater Harvesting

will save you time and money because you’ll get everything you need with one phone call.

Benefits: • Turn-key system from single provider

• Complete sizing and engineering support

• Easy installation

• Flexible systems with many options

• System warranty and ongoing maintenance service

Flexible Runoff Reduction Solution

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Learn more at www.ContechES.com/rwh

Rainwater Harvesting: Design Made Easy

Learn About Rainwater Harvesting New stormwater regulations require on-site water management, which can be a design challenge. Rainwater Harvesting is a Low Impact Development tool that can achieve both runoff reduction and water conservation.

Go online (www.ContechES.com/rwh-animation) and watch our video to learn how Rainwater Harvesting offers benefits including:

• Achieve the runoff reduction required for your stormwater permit

• Conserve water resources

• Provide up to 12 LEED Points

• An LID solution with a positive ROI through utility savings

To use the Rainwater Harvesting Runoff Reduction Calculator tool, visit: www.ContechES.com/rwh-ca l cu lat or

To view the Rainwater Harvesting Animation, visit: www.ContechES.com/rwh-an imat i o n

Calculate the Benefits of Rainwater HarvestingThe Contech Runoff Reduction Calculator (www.ContechES.com/rwh-calculator) is a free tool that allows users to quickly and easily determine the benefits of a rainwater harvesting system. With the Runoff Reduction Calculator, you can calculate:

• Runoff Reduction and Stormwater Volume Retained On-site

• Water saving and reduction of demand on potable supplies

• Financial savings based on reduced utility fees

• Information to support LEED Credits

• Reports for Stormwater Permit Approval

Rainwater Harvesting: System Overview

Integrated system with multiple options makes it simple to meet your site-specific needs.

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PretreatmentDownspout or Underground

• 100% flow capture

• Removes gross solids

CisternMaterial Available

• Steel Reinforced Polyethylene

Mechanical SystemIndoor Mechanical Room • Outdoor Enclosure

Treatment:

• Screening

• Filtration

• Ultra-Filtration

• Ultraviolet disinfection

• Chlorination

Pump:

• Submersible

• Suction

• Variable Speed

• Simplex

• Duplex

Control Systems:

• Control Panel Display

• Remote Display

• Building Management System

• Web Monitoring

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Downspout CDS®

Proven Pollutant RemovalPretreating stormwater prior to storage protects downstream pumps, filters and fixtures from damage or clogging, and lowers cleaning and maintenance costs by keeping pollutants out of the cistern and mechanical system. It also reduces the amount of organic matter and biological oxygen demand (BOD) in the cistern, decreasing the likelihood of creating anaerobic conditions and associated odors.

UrbanGreen™ Pretreatment

CDS® System

Underground Pretreatment For more than 20 years, Contech hydrodynamic separators have provided proven and reliable removal of sediment, trash, debris, oil and grease on thousands of sites.

CDS• Continuous Deflection Separation

– Captures and retains 100% of floatables – Self-cleaning screen is the only non- blocking screening technology available – Provides storage of captured pollutants below screen for unimpeded flow – 100% flow capture

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Learn more at www.ContechES.com/rwh

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UrbanGreenTM Rainwater Harvesting System components ready for installation.

UrbanGreen™ Mechanical Systems

Mechanical Building Blocks to Customize your Solutions ...

Mechanical SystemsOptions• Indoor Mechanical Room

• Outdoor Enclosure – Locked and Tamper Proof – Insulated – Climate Controlled

• Underground Vault

Make-up WaterOptions• Re-fill wet well or day tank to

create air-gap and meet code

• Direct feed with Backflow prevention valve can ensure water service during power outage

• Municipal makeup water ensures water supply during dry periods

PumpsFeatures• Sized to meet the maximum

instantaneous demand for all combined applications

• Provide standard city water pressure to meet code and operational standards

Options• Submersible in Cistern

• Submersible in Wet Well

• Suction from above ground

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Learn more at www.ContechES.com/rwh

ControlsFeatures• Automatically control pumps

and power

• Performs ongoing monitoring and communication

• Remote monitoring and alert capabilities available

• Flexibleandcustomizablesystems for your site-specific needs.

Options• Control Panel

– Remote Display – Internet Access

• Monitoring – Filter Maintenance – Usage: Re-use, Make-up – Pump Maintenance – Disinfection

• Continuous Controls – Automated First Flush Diversion – Treatment and Disinfection – Make-up water

• Reporting – Display – Email – Text

UrbanGreenTM Rainwater Harvesting System Control Panel

More than a product...• Full Design Service

• On-Site Installation Assistance

• Ongoing Inspection and Maintenance Support

Learn morewww.ContechES.com/rwh

Treatment & DisinfectionFeatures• Screening to remove gross solids

• Filtration to remove particulates and fine sediment

• Disinfection to destroy bacteria and viruses

Options• Filtration

– Single/Multi Stage – Standard/Ultra – Manual/Automatic Back Flush

• Ultraviolet Disinfection: Best for applications where water will be used immediately, such as irrigation

• Chlorination Disinfection: Commonly used for applications that require residual disinfection capability and is common for non-irrigation applications

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UrbanGreen™ Cisterns

DuroMaxx® SRPE

Our steel-reinforced polyethylene (SRPE) pipe is an ideal choice for rainwater harvesting cisterns. Eighty (80) ksi steel reinforcing ribs provide the strength and pressure rated polyethylene (PE) resin provides the durability. The combination of materials results in an extraordinarily strong and durable pipe that sets a new industry standard. DuroMaxx systems are custom made to watertight specifications to suit project requirements.

• HDPE with steel reinforced ribs provides incredible strength and durability

• Available up to 120” diameter – utilizing larger diameters whenever possible reduces storage cost per gallon

• DuroMaxx has fewer joints to assemble on site, resulting in faster installation rates

• Lightweight - easily handled and quickly installed, often without the use heavy construction equipment

Cistern standard details available

at www.ContechES.com/rwh

INTAKE

INTAKE

Typical underground cistern components

96” Steel Reinforced Polyethylene Cistern

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Learn more at www.ContechES.com/rwh

Project SummaryA brand-new 4,617-sq-ft Chick-fil-A restaurant recently opened at Montgomery Plaza in Ft. Worth, Texas, and is the company’s first effort to design and build a sustainable restaurant—a building that is environmentally friendly and saves operating costs through energy efficiency. It is the first in the chain to be built to the standards of the U.S Green Building Council’s Leadership in Energy and Environmental Design (LEED) certification program.

Project Highlights• Limited available space on this redeveloped urban site,

required an underground system.

• Harvested water will be used for on-site irrigation for the grounds around the facility, reducing water usage by approximately 40%.

• The SRPE cistern utilizes DuroMaxxTM technology and is comprised of three 60” diameter cistern sections that are each 80 feet long.

Client Testimonial“We chose the UrbanGreen rainwater harvesting cistern because of its superior joint quality; it will hold water for extended periods of time,” said Bryan Burger with Burger Engineering, LLC. “It was also preferred because of its cost effectiveness when compared to concrete pipe. Concrete is more expensive and is not watertight.”

Project Profile: Chick-fil-A at Montgomery Plaza, Fort Worth, Texas

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Project Profile: Alta Vista Park Diversion & Reuse, Redondo Beach, California

Project SummaryThe number one cause of coastal water pollution in Southern California is urban stormwater runoff. The City of Redondo Beach is taking steps to protect their coastal waters by collecting the stormwater runoff that would have been harmful to the beach, treating the runoff to clean out the debris and then using it to irrigate Alta Vista Park.

Project Highlights• Project is funded by the American Recovery and

Reinvestment Act (ARRA) and administered through the State Water Resources Control Board’s Clean Water State Revolving Fund (CWSRF).

• Below ground rainwater harvesting was necessary to accommodate small site constraints.

• Four phase rainwater harvesting system includes two treatment systems and two storage cisterns.

Client Testimonial“The City Council has been very proactive regarding water quality and “Green” development, and their support has given the staff the incentive to think outside the box and to come up with innovative projects that protect the bay and our valuable resources,” said Mike Shay, Principal Civil Engineer, City of Redondo Beach.

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Learn more at www.ContechES.com/rwh

Project SummarySeattle Public Utilities (SPU) is building a new $50 million waste transfer station building in South Seattle, projected to be finished in July 2012. SPU’s goal was to build this project to the standards of the U.S. Green Building Council’s Leadership in Energy and Environmental Design (LEED) certification program and to achieve LEED Gold status. To achieve credit for water efficiency, SPU wanted to harvest rainwater to reuse on-site.

Project Highlights• Harvested water will be used in many ways such

as irrigation, to wash the transfer station floor, as washdown water for the tipping floor and for the wheel wash for trucks.

• Irrigation will be used for the new landscaping around the facility, including 123 on-site trees, 32,000 SF of ground cover and 81,000 SF of grass cover.

• The SRPE cistern utilizes DuroMaxxTM technology and is comprised of two 84” diameter cistern sections that are each 75 feet long.

Client Testimonial“The new facility will allow the city to maintain reliable solid waste services in an economical and environmentally sound manner,” said Henry Friedman, Project Manager for Seattle Public Utilities.

Project Profile: South Transfer Station, Seattle, Washington

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Learn moreRead our white paper, Rainwater Harvesting and Reuse, to learn more about the components of a rainwater harvesting system. You’ll receive free PDH credits for completing a quick quiz. Available at www.ContechES.com/rwh

View the AnimationTo view the Rainwater Harvesting Animation, visit www.ContechES.com/rwh-an imat i o n

Connect with UsWe’re always available to make your job easier. Search for your local rep at www.ContechES.com. While you’re there, be sure to check out our upcoming seminar schedule or request an in-house technical presentation.

Start a ProjectIf you are ready to begin a project, submit your system requirements on our easy to use form found on our website at www.ContechES.com/rwh

Rainwater Harvesting Runoff Reduction CalculatorTo use the Rainwater Harvesting Runoff Reduction Calculator tool, visit: www.ContechES.com/rwh-ca l cu lat or

UGRWH Brochure 11/13 PDF

©2013 COnTECH EnGinEERED SOLUTiOnS LLC

800.338.1122

www.ContechES.com

All Rights Reserved. Printed in the USA.

NOTHING IN THIS CATALOG SHOULD BE CONSTRUED AS AN EXPRESSED WARRANTY OR AN

IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. SEE THE

CONTECH STANDARD CONDITION OF SALES (VIEWABLE AT WWW.CONTECHES.COM/COS)

FOR MORE INFORMATION.

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