community engineering corps®: two case studies from the ...€¦ · three case studies from the...

Joanie Stultz, Brown and Caldwell John Roth, Clark PUD Patrick Weber, Brown and Caldwell

Community Engineering Corps®: Three Case Studies from

the Pacific Northwest Section May 4th, 2017

PNWS Conference, Kennewick, WA

The Alliance

Alliance Mission Bringing communities and engineering

leaders together to advance local infrastructure solutions

Alliance Vision A country in which underserved

communities have access to the technical expertise required to ensure the

infrastructure capacity to meet their needs

Leadership

Region 1

Mark Tompeck, NJ

Maria Carbo, Chesapeake

TBD, MD

Region 2

Sandy Smith, GA

Pam Moss, NC

Alan Cranford, KY/TN

Region 3

Tim Wilson, IA

Jon Eaton, MN

Del DeBoer (invited),

ND/SD

Region 4

Scott Paxman, Intermountain

Charlie Anderson, TX

TBD, Rocky Mountain

Tom Wolf, AK

Phil Holderness,

CA/NV

Lynn Williams Stephens, Pacific NW

Legend: Total Water Solutions project TWS project, AWWA team Other

2015-2017 AWWA Water Projects Project Name Project Type Community State

Project Team Name Phase

Elementary School Water Supply Olympia Area Washington Pacific Northwest

Section 2015-2016

Elementary School Water Supply Greater Vancouver Washington Pacific Northwest

Section 2016- Present (Monitoring)

Water Users Association Water Supply Olympic Peninsula Washington Pacific Northwest

Section 2017 (Just started)

• 28 projects in total for CEC • 7 Sponsored by AWWA to date

The Community and the Team

• Communities can apply either with or without an affiliated project team

• Communities without a team are matched according to team’s expertise

• Team needs to fit the community’s needs - and engage the community

The Process Community Applies for Project

Assemble Project Team

Scope of Work and Contract

Project Reports and Deliverables

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Greater Olympia Elementary School

Joanie Stultz

Overview •Background and Motivation •Project Team •Water System History (Pilot Testing) •Existing System •CEC Project:

– Design Objectives – Alternatives Evaluation – Recommendations

Background and Motivation

•Rural area •Single well serves 250 elementary students (1,900 gpd)

•Arsenic, iron, manganese, and taste and odor issues

•High levels of TOC

Project Team

Project Team: • Project lead

• Bob Wubbena, Retired Engineer, past AWWA President • Technical lead, responsible engineer –

– Lynn Stephens, Brown and Caldwell • Worked with St. Martins University EWB Chapter

Water System History •Pilot study in 2008

•Membrane filtration followed by GAC •Potassium permanganate as oxidant •Ferric sulfate as coagulant upstream of filters •Approved for full-scale implementation

•Pilot Study in 2015 •Greensand upstream of GAC for Arsenic removal

Existing System • GAC filters > sodium hypochlorite (oxidant) and ferric chloride (coagulant) > cartridge

filters (membrane filtration) > storage

GAC Filters (4)

NaOCl Feed Tank

FeCl3 Feed Tank

Contact Tank

Cartridge Filters

(2)

Storage Tanks (2)

NaOCl Feed Tank

Existing Water Quality • Elevated levels of Arsenic, manganese and iron • Soft water, slightly corrosive with elevated Cu levels • pH 8.0

Table 1. Raw Water Quality Summary

Parameter Number of Samples

Range (mg/L)

Average (mg/L)

Primary or Secondary

MCL (mg/L)

TOC 4 1 - 10.6 4.8

Arsenic 27 0.006 - 0.03 0.011 0.01

Iron 10 0.06 - 0.5 0.09 0.3

Manganese 18 0.05 - 0.08 0.06 0.05

Design Objectives • Improve treatment

– Arsenic (primary contaminant) – Manganese (secondary contaminant) – Iron (secondary contaminant) – Organics (tastes and odors, and disinfection by-product precursors)

• Improve operation and maintenance – Automated filter cleaning or reduce need for weekly filter replacement

Alternatives Evaluation

•Develop a new well supply X • Install new membranes X • Install ion exchange X • Install a biological filter X • Install a greensand filter system

– Proven technology – Successful pilot study – 5 year media life

Recommendations • Replace one cartridge filter with greensand filter • Automate backwashing of GAC and greensand filter • Develop an O&M plan (still needed to be completed)

W e ll P u m pR A W W A T E RG A C

C o n ta c to r 1

P IL O T S T U D Y E F F L U E N T W A T E R

G re e n s a n dF ilte r

S o d iu m H y p o c h lo r iteS o lu t io n T a n k

S o d iu m H y p o c h lo r iteF e e d P u m p

F e rr ic C h lo r id eS o lu t io n T a n k

F e rr ic C h lo r id eF e e d P u m p

G A CC o n ta c to r 2

G A CC o n ta c to r 3

G AC o n ta c to r 4

C a r tr id g e F ilte r

Where are we?

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John Roth

Greater Vancouver Elementary School

Elementary School in Greater Vancouver Area

Sampling Plan

Sampling: (2) 250 ml samples of first draw (2) 250 ml samples second round

Chloride Calcium Sulfate Iron Manganese Lead Copper

Chlorine residual (field test) Total Chlorine (field test) pH (field test & lab) Alkalinity (measured as calcium carbonate) Temperature (field test) Total dissolved solids (TDS) Hardness Conductivity

Staff room (background) Library/Art (3 hits at or above 10 ppb) Kitchen (1 hit at or above 10 ppb)* K & 1 Classroom (background) 2 & 3 Classroom (1 hit at or above 10 ppb) 4 & 5 Classroom (1 hit at or above 10 ppb) *Note: the kitchen had only been sampled once according to records

Project Team: • Project lead – John Roth, Clark PUD • Engineer of Record – Lynn Williams Stephens, BC • Mentor – Bob Wubbena • Independent Review Panelists

– Mike Whiteley, City of Gresham – Patrick Craney, City of Vancouver – Bill Persich, BC – Melinda Friedman, Confluence

Elementary School in Greater Vancouver Area

Elementary School in Greater Vancouver Area

• Recommendations – Record daily system flushing – Comprehensive program to replace unknown

fixtures with lead-free versions – Treatment improvement of aeration to raise

pH

Where are we?

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Olympic Peninsula Small Water System

Assistance

Patrick Weber

Olympic Peninsula

Community

• Small Water Users Association • Mix of full time and vacation homes; two

inns • 22 homes, 8 full-time residents • Limited funding available

Challenge/Need

• Red operating permit • Unfiltered GWI source • Reduction in operating costs • Long-term water planning services to build

capacity • Access to professional services

– Long project history

Existing Water System

Existing Water System

Creek behind well house New well head

Planned Improvements

• Connect new well to system – Want to be a groundwater system

• Electrical supply from existing well house • Connect to well house treatment (TBD) • Practical and cost-effective

Scope of Work

• Source Approval report for new well • Water system improvements:

• Basis of design report • Construction documents

• Construction completion report – (construction planned early 2018)

• Small Water System Management Plan

CEC Project Team Project Lead: Jester Purtteman (Previously DOH) Technical Lead, Responsible Engineer in Charge: Jim Konigsfeld (Sammamish Plateau Water) Technical Team:

• Patrick Weber, PE (BC) • Kirsten Wood, PE (BC) • Joanie Stultz, EIT (BC) • Beth Mende, EIT (HDR)

Independent Review Panel: • Kyle Wong, Sammamish Plateau Water • Patrick Van Duser, Black & Veitch • Bob Wubbena, retired

UW Student Team

Joanie Stultz

Ways To Get Involved

More Information • Friday, 12:00 – 1:00, Room D CEC Meeting • June CECorps Lunch-Box Talk (1 PDH)

• Thursday June 8, 2017 online

• ACE 2017 In person Training (1 PDH) • Monday June 12th, 2017 at AWWA’s Annual

Conference and Exposition.

Contact Us CECorps PNWS-AWWA Liaison

– Lynn Williams Stephens, Brown and Caldwell (BC) LStephens@brwncald.com

Speakers: John Roth, Clark PUD jroth@clarkpud.com Joanie Stultz, BC jstultz@brwncald.com Patrick Weber, BC pweber@BrwnCald.com

http://www.communityengineeringcorps.org/