community engineering corps®: two case studies from the ...€¦ · three case studies from the...
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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
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The Alliance
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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
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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
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Legend: Total Water Solutions project TWS project, AWWA team Other
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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
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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
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The Process Community Applies for Project
Assemble Project Team
Scope of Work and Contract
Project Reports and Deliverables
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545/546
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Greater Olympia Elementary School
Joanie Stultz
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Overview •Background and Motivation •Project Team •Water System History (Pilot Testing) •Existing System •CEC Project:
– Design Objectives – Alternatives Evaluation – Recommendations
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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
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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
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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
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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
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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
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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
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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
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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
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Where are we?
541
542
543/544
545/546
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John Roth
Greater Vancouver Elementary School
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Elementary School in Greater Vancouver Area
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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
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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
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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
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Where are we?
541
542
543/544
545/546
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Olympic Peninsula Small Water System
Assistance
Patrick Weber
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Olympic Peninsula
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Community
• Small Water Users Association • Mix of full time and vacation homes; two
inns • 22 homes, 8 full-time residents • Limited funding available
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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
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Existing Water System
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Existing Water System
Creek behind well house New well head
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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
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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
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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
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Joanie Stultz
Ways To Get Involved
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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.
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Contact Us CECorps PNWS-AWWA Liaison
– Lynn Williams Stephens, Brown and Caldwell (BC) [email protected]
Speakers: John Roth, Clark PUD [email protected] Joanie Stultz, BC [email protected] Patrick Weber, BC [email protected]
http://www.communityengineeringcorps.org/
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