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Rainwater Harvesting

ENGINEERED SOLUTIONS

Solutions Guide

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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 UrbanGreen® 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 best management practice (BMP) to treat the balance. Finally, select a detention system to address any outstanding downstream erosion.

© 2015 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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PretreatmentProtect downstream

pumps, filters, & fixtures

• Remove sediment, trash, and debris

• Lowers cleaning and maintenance costs by keeping pollutants out of the cistern and mechanical system.

CisternCapture and store

harvested water

• Eighty (80) ksi steel reinforcing ribs with pressure rated polyethylene (PE) resin

• Watertight joint

• H-25 traffic rated

Mechanical SystemTreatment, pumps, and control systems

Pump:

• Submersible

• Suction

• Variable Speed

• Simplex

• Duplex

Treatment:

• Screening

• Filtration

• Ultra-Filtration

• Ultraviolet disinfection

• Chlorination

Control Systems:

• Control Panel Display

• Remote Display

• Building Management System

• Web Monitoring

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CDS®

The CDS hydrodynamic separator is the preferred rainwater harvesting pretreatment device. CDS is an underground stormwater treatment device that uses swirl concentration and continuous deflective separation to screen, separate and trap trash, debris, sediment, and hydrocarbons from stormwater runoff. With CDS there is no need for “first flush” diversion, so no water is wasted.

JellyFish® FilterThe Jellyfish Filter is an engineered Stormwater quality treatment technology featuring pretreatment and membrane filtration in a compact stand-alone treatment system, which removes a high level and a wide variety of stormwater pollutants.

Proven Pollutant RemovalPretreating harvested water 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. Contech offers a number of pretreatment devices including.

Protect Vital RWH Systems

CDS®

StormFilter®

JellyFish® Filter

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Learn more at www.ContechES.com/rwh

The Stormwater Management StormFilter®

StormFilter uses rechargeable, media-filled cartridges absorb and retain the most challenging target pollutants including dissolved metals, hydrocarbons, and nutrients metals and other common pollutants found in stormwater runoff.

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UrbanGreen® Rainwater Harvesting Mechanical Systems

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

• Flexible and customizable systems 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

More than a product...• Full Design Service

• On-Site Installation Assistance

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 – Manual/Automatic Back Flush

• Ultraviolet Disinfection: Best for applications where there is opportunity for human contact or required by code.

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

UrbanGreen® Rainwater Harvesting Control System

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UrbanGreen® Tanks

DuroMaxx® SRPE Technology

The UrbanGreen Rainwater Harvesting tank is made from DuroMaxx Steel Reinforced Polyethylene (SRPE). The 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 below ground cistern.

• Available up to 120” diameter

• Includes prefabricated access points

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

• H-25 traffic rated design

Contech’s UrbanGreen Rainwater Harvesting tanks have been certified to be in compliance with the Uniform Plumbing Code (UPC®) by The International Association of Plumbing and Mechanical Officials (IAPMO) Research and Testing.

Engineers can now write specifications for rainwater harvesting tanks based on a nationally recognized standard that address issues such as structural design, leakage, and repeatable manufacturing processes. Contech is only one of two companies that have received IAPMO/UPC certification for rainwater harvesting tanks.

Tank standard details available

at www.ContechES.com/rwh

INTAKE

INTAKE

Typical underground tank components

120” Steel Reinforced Polyethylene Tank

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Learn more at www.ContechES.com/rwh

Project SummaryThe new facility for probiotic drink manufacturer Yakult called for the design and construction of a stormwater management system that would meet local Low Impact Development (LID) regulations.

The consulting engineer and landscape architect worked with Contech to develop two rainwater harvesting systems to capture and reuse runoff from roof tops, parking lots, and other impervious surfaces and use the runoff for irrigation.

Project Highlights• Two CDS hydrodynamic separators to pretreat

stormwater prior to storage.

• The first system uses a cistern made from four barrels of 696’ of 48” diameter DuroMaxx SRPE. The second system uses five barrels of 520’ of 48” diameter DuroMaxx SRPE.

• Integrated mechanical systems with an exterior cabinet, variable frequency drive submersible pump, 100 micron screening filter, and a color touchscreen display system controller with level monitoring and city water makeup control.

Client Testimonial“Contech gave us the ability to get a complete packaged solution, with all the componentry from a single source,” said Craig Di Bias of Joseph C. Truxaw & Associates. “Contech is known for standing behind their products.”

Yakult Manufacturing, Fountain Valley, California

The project won the ENR Award for

Southern California’s Best Manufacturing

Project in 2014

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Dallas Arboretum – Rory Meyers Children’s Adventure Garden, Dallas, Texas

Project SummaryThe Dallas Arboretum’s Rory Meyers Children’s Adventure Garden incorporates many sustainable features, including an UrbanGreen rainwater harvesting system from contech that provides water for irrigation. Contech worked with engineers at Pacheco Koch to design a system consisting of a CDS hydrodynamic separator, two DuroMaxx SRPE cisterns, and mechanical pumps and controls.

Project Highlights• A CDS hydrodynamic separator to pretreat stormwater

prior to storage.

• Two 96” diameter DuroMaxx cisterns providing 50,000 gallons of storage.

• Integrated mechanical system with an exterior cabinet, submersible pump, 100 micron screening filter with auto flush, and a system controller with level monitoring and city water makeup control.

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Learn more at www.ContechES.com/rwh

Project SummaryOceano Warner Center is a 244 unit, 5.8 acre apartment complex located in Woodland Hills, California. Water and energy conserving technologies and practices were incorporated into the site to reduce the community’s carbon footprint.

The 3.57 acre construction site was challenging because it consisted of 85% impervious surface and included 48,778 SF of landscaping. Engineers originally looked at retention as a way to control stormwater, but rainwater harvesting was chosen as it provided the runoff reduction required by the Community of Woodland Hills in the City of Los Angeles

.

Project Highlights• A CDS hydrodynamic separator for pretreatment.

• A 500’ long, 96” diameter, DuroMaxx cistern provides 188,000 gallons of storage.

• Contech provided all of the pumps and controls, providing a turn-key system from a single provider.

• Two additional CDS units to treat runoff from roadways not collected in the cistern.

Oceano Warner Center, Woodland Hills, California

Oceano Warner Center was honored as

the Best New Construction in Los Angeles

by the California Apartment Association

and is LEED Silver Certified

We print our brochures entirely on Forest Stewardship Council certified paper. FSC certification ensures that the paper in our brochures contain fiber from well-managed and responsibly harvested forests that meet strict environmental and socioeconomic standards.

FSC

Learn More

Dig DeeperFind all the information you need at www.ContechES.com, including field and laboratory test results, approvals, brochures, design guides, standard details and specifications within the product section of our site.

QUICK LINKS:

• LID Application Guide – www.ContechES.com/lid• Articles – www.ContechES.com/pdh

Connect with UsWe're here to make your job easier – and that includes being able to get in touch with us when you need to. www.ContechES.com/localresources. While you’re there, be sure to check out our upcoming seminar schedule or request an in-house technical presentation.

RWH Brochure 5M 8/15 (PDF update 10/16)

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.

ENGINEERED SOLUTIONS

Start a ProjectIf you are ready to begin a project, contact your local representative to get started. Or you can check out our design toolbox for all our online resources at www.ContechES.com/designtoolbox.

Links to RWH Tools:• Download The Rainwater Harvesting Answer Book, a

collection of questions and answers from Contech’s webinar series on RWH as a runoff reduction Tool – www.ContechES.com/rwh-series

• Watch the RWH animation – www.ContechES.com/rwh-animation

• View one of our RWH webinar recordings – www.ContechES.com/rwh-webinar

• To use the Rainwater Harvesting Runoff Reduction Calculator tool, visit: www.ContechES.com/rwh-calculator

©2016 Contech Engineered Solutions LLC800-338-1122 | www.ContechES.comAll Rights Reserved. Printed in the USA.

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ENGINEERED SOLUTIONS

PIPE SOLUTIONSMeeting project needs for durability, hydraulics, corrosion resistance, and stiffness • Corrugated Metal Pipe (CMP) • Steel Reinforced Polyethylene (SRPE) • High Density Polyethylene (HDPE) • Polyvinyl Chloride (PVC)

TREATMENT SOLUTIONSHelping to satisfy stormwater management requirements on land development projects • Stormwater Treatment• Detention/Infiltration• Rainwater Harvesting• Biofiltration/Bioretention

STRUCTURES SOLUTIONSProviding innovative options and support for crossings, culverts, and bridges • Plate, Precast & Truss bridges • Hard Armor • Retaining Walls• Tunnel Liner Plate

COMPLETE SITE SOLUTIONS