Presented by:

Wes Saunders Pearce (City of St. Paul)

Dave Stark (Stark Rainwater Harvesting)

GreenStep Cities

January 21, 2015

OMF

CHS Field

Local Drivers

Sustainable Stormwater

Area Plan

Opportunity

•Audience

•Destination

Rules

•State B3

•CRWD

•City

Greater Lowertown Master Plan

Reduce use of potable water Use rain water and stormwater

as a resource irrigation within buildings

Challenges Lack of adopted

standards

Multiple jurisdictions

No defined process

Limited agency capacity

Duties; authority

Operation and maintenance oversight

Water economics

State Rules and Agencies MN Rule Chapter 4715 MN Rule Chapter 4720

Plumbing Code

Department of Labor and Industry (DLI)

Public Water Supplies

Department of Health

Code Considerations Plumbing Code

Silent on rainwater harvesting

Allows for Alternative Methods review

Provisions for First Class cities

Public Water Supply

Treatment

Review

Partnership Agencies • Capitol Region WD • Metropolitan Council • Metro Transit Project Team • St. Paul Saints • City of Saint Paul

Parks and Rec. • Ryan Companies

• Schadegg Mechanical • Solution Blue, Inc. • Rainwater Management Solutions

www.rainwatermanagement.com • Stark Rainwater Harvesting

Sp. Grant App

Sp. Grant Award

MetCo Scoping

OMF Tour

Design Charrette

MetCo Env Com.

Schem Design & Cost

MEP Hired

Conf Call

MetCo Letter

MetCo coord mtg

Sp. Grant amend

U of M Tour

Conf Call

MetCo coord mtg

City Gap Funding

DSI-SPRWS Coord

Lowertown Future Fund App

Conf Call

Design Charrette

CRWD Bd Mtg

Final Design Review

Final Plans

Vetting Meeting

Addendum 1

O&M Coord.

7/15

/13

8/1

5/13

9/1

5/13

10/1

5/13

11/1

5/13

12/1

5/13

1/15

/14

2/15

/14

3/15

/14

4/1

5/14

5/15

/14

6/1

5/14

Lowertown Ballpark Rainwater Harvesting

2013-14 Milestones

Design Charrette Facilitated by Rainwater

Management Solutions and Local Representative Stark Rainwater Harvesting

City of Saint Paul Dept of Safety and Insp.

Dept of Parks and Rec.

CRWD

MCES

Ryan Cos.

Solution Blue

Schematic design and prelim cost estimates

Is Indoor Use Allowed? Great River Energy - Maple Grove (2008)

17th Avenue Dormitory - University of MN (2013)

Lowertown Regional Ballpark (2015)

Utilized draft Chapter 17 of UPC (amended)

Incorporated treatment standards from NSF/ANSI 350

Indoor Use Examples Great River Energy (2008)

Maple Grove, MN

20,000 gall cistern

Platinum LEED-NC (first in MN)

University of MN (2013)

17th Avenue Hall

35,000 gall cistern

RAINWATER HARVESTING – NOT GREYWATER REUSE

Design Refinement: U of M tour

April 2014 Final Mechanical Design Final System Schematic OMF/Cistern connection

Final Design Rainwater use – toilet flushing & ballfield irrigation

27,000 gallon tank 10% of toilet fixtures; 15-20% of field demand

Vetting and Coordination State, local reviewers;

funding partners; project team

Facilitate transparency

Receive comments, perspective, or technical input

Water Benefits - Annual 27,000 gallon tank; 0.75-acre roof area

450,000 gallons domestic water saved

16% potable water use reduction annually

Roughly equal to 7 single family residential properties

Enhanced Site Sustainability Total cost …………………………………….. $487,000

Rainwater harvesting system …… $ 300,000

Enhanced stormwater items ………….. $ 68,000

Design and Admin/Fees ……………….. $ 75,000

Contingency ….……………………………… $ 44,000

Total grants ……………… ………………… $425,000

Project commitment …….………………. $ 62,000

Ballpark Installation

WISY Prefilter Installation

Pre-assembled Pump and Treatment Skid

Ballpark Controls Package • BACNET Compatible • Low Level Pump Protection • Pump and VFD Status • Domestic Use vs Rain Use • UV Status • Level Sensors • Switch to Toilets Only • Capabilities to Add or

Change

Where Code Issues Occur • Interdisciplinary – Stormwater, Health, Plumbing • Jurisdiction for indoor use is plumbing code. • No code = Alternate Materials and Method Request. • Plans should be submitted by Mechanical Engineer. • Treatment for Graywater, Reclaimed Water and

Rainwater • Municipal Intertie – Solutions (Air Gap, RPZ, Separate

Lines) • Potable vs. Non-Potable Standards • Maintenance and Operations Plans

http://www.plumbingengineer.com/march_07/rainwater.php

If No Code and Indoor Use – (AMMR)

American Rainwater Catchment System Association (ARCSA)

The Mission of ARCSA is to promote sustainable rainwater harvesting practices to help solve potable, non-potable, stormwater and energy challenges throughout the world.

www.arcsa-usa.org

• Workshops and Accreditation Program

• National Conference

• Stark is Regional Representative

• New National Manual

• Rainwater Harvesting Guidelines

• MOU’s – ICC, UPC, IAPMO, NSF and CanARM

ARCSA/ASPE Standard 63

First Step – Determine Jurisdiction State vs. National Codes

http://www.deltafaucet.com/tools-resources/selecting-products/plumbing-codes/index.html

Minnesota – DLI Request for Action on Codes

http://www.doli.state.mn.us/PDF/pb/RFA.xls

Local Education is Key

Strategies Moving Forward Education - Plumbers, engineers, landscape architects, architects

Workshops - U of M, ARCSA, Industry and Code Officials

Collaboration - Design charrettes, LBC teams, Stormwater

Partner – Suppliers, mechanical/civil engineers, plumbers, landscape architects, irrigation professionals

Examples – Provide system examples in similar climates and show working examples of your products and projects

Tours –Emphasize Rainwater Harvesting as a Stormwater BMP

Develop MN Specific RWH Guidelines and Specifications

Continue work on MIDS and sizing systems

Task Force – Include ARCSA and Industry Partners

Database – Building databases of water quality to provide “proof it can be done”

Thank You. Questions?

GreenStep Cities January 21, 2015

Wes Saunders Pearce (City of St. Paul) Dave Stark (Stark Rainwater Harvesting)