Signed Contract_Strand Associaties, Inc. for the Poly- and Perfluoralkyl Substances (PFAS) Treatment EvaluationCity of Dubuque
City Council Meeting
Consent Items # 014.
Copyrighted
January 17, 2023
ITEM TITLE: Signed Contract(s)
SUMMARY: Strand Associates, Inc. for the Poly- and Perfluoralkyl Substances
(PFAS) Treatment Evaluation.
SUGGESTED Suggested Disposition: Receive and File
DISPOSITION:
ATTACHMENTS:
Description Type
Strand Associates, Inc. for the Poly- and Perfluoralkyl Supporting Documentation
Substances (PFAS) Treatment Evaluation.
Strand Associates, Inc.'
® 910 West Wingra Drive
Madison, WI 53715
® (P) 608.251.4843
STRAND www.strand.com
ASSOCIATES"
Excellence in Engineering
Since 1946
Task Order No. 22-07
City of Dubuque (OWNER)
and Strand Associates, Inc.® (ENGINEER)
Pursuant to Agreement for Technical Services dated June 9, 2016
Project Information
Project Name: Poly- and Perfluoralkyl Substances (PFAS) Treatment Evaluation
Scope of Services
ENGINEER will provide the following services to OWNER:
1. Review water quality information provided by OWNER including HAS testing results for all
wells and finished water at the Eagle Point Water Treatment Plant (WTP). Provide a listing of
additional water quality parameters for OWNER to collect and have tested, as appropriate.
2. Summarize the current applicable PFAS advisories published by the United States
Environmental Protection Agency and Iowa Department of Natural Resources.
3. Evaluate treatment for PFAS removal at the Eagle Point WTP. Evaluation will consider criteria
including removal efficiency; opinion of probable construction costs; operational and
maintenance costs; waste handling and disposal; and associated structural, electrical, and
mechanical modifications. Evaluation will include the following three treatment alternatives:
a. Granular activated carbon (GAC):
i. GAC within existing filter basins with powdered activated carbon pretreatment.
ii. GAC in standalone vessels in series.
b. Ion exchange in.�tandalone vessels in series.
C. Reverse osmosis.
4. Review space needs for each treatment alternative at 13 and 20 million gallons per day and
prepare conceptual floor plan and site plan layouts, as appropriate. Site plan layouts will use
existing OWNER -provided drawings.
5. Develop conceptual design criteria including process flow schematics.
6. Evaluate overall water system water quality from each treatment alternative, including potential
modifications to existing treatment processes as included in the Eagle Point WTP Process and
Condition Assessment currently being prepared by ENGINEER.
7. Prepare a present worth cost analysis for each PFAS treatment alternative.
8. Evaluate potential abandonment of HAS impacted wells and replacement with new deep wells.
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Arizona I Illinois I Indiana I Iowa I Kentucky I Ohio I Tennessee I Texas I Wisconsin
Strand Associates, Inc.'
City of Dubuque
Task Order No. 22-07
Page 2
November 3, 2022
9. Prepare opinions of probable construction costs for replacement deep wells and associated piping
to the Eagle Point WTP.
10. Prepare a draft report and submit to OWNER for review. Attend one in -person meeting with
OWNER to review the report and OWNER -selected alternative.
11. Incorporate OWNER's comments, as appropriate; prepare final report; and submit to OWNER.
12. Prepare presentation materials and attend one in -person public information meeting to present
final report.
Compensation
OWNER shall compensate ENGINEER for Services under this Task Order a lump sum of $59,900.
Schedule
Services will begin upon execution of this Task Order, which is anticipated the week of
November 7, 2022. Services are scheduled for completion on March 31, 2023.
TASK ORDER AUTHORIZATION AND ACCEPTANCE:
ENGINEER: OWNER:
STRAND ASSOCIATES, INC.®
2z
Jo h M. Bunker a e
Corporate Secretary
CITY OF DUBUQUE
� k�4_/Q_4�11/21/2022
M chael C. Van Milligen Date
City Manager
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www.strand.com
TIDE CITY OF
DtUB El
Masterpiece an the Mississippi
TO: Michael C. Van Milligen, City Manager
FROM: Christopher J. Lester, Water Department Manager
DATE: November 18, 2022
RE: PFAS Treatment Evaluation
Strand Associates Task Order Request
Dubuque
All-Ameriea I:igr
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2007-2012•2o13
2017*2019
PURPOSE
The purpose of this memorandum is to request authorization to enter into an agreement
with Strand Associates to evaluate the City of Dubuque's PFAS and PFOA results and
evaluate water treatment processes for the removal of PFAS contaminants at the Eagle
Point Water Treatment Plant.
INTRODUCTION
The Iowa Department of Natural Resources is undertaking a statewide sampling initiative to
determine the prevalence of a class of chemicals known as per -and polyfluoroalkyl
substances, commonly referred to by the acronym "PFAS."
As defined by USEPA, Per- and poly-fluoroalkyl substances (PFAS) are a large and diverse
group of chemicals used in many commercial applications due to their unique properties,
such as resistance to high and low temperatures, resistance to degradation, and nonstick
characteristics. This class of manmade compounds includes more than 5,000 individual
chemicals. PFAS compounds have been extensively used for more than 70 years in
applications such as: non-stick coatings; stain -resistant carpeting; water repelling clothing
and fabrics; paper packaging for food; and metal plating operations.
In August 2022, the Iowa Department of Natural Resources (Iowa DNR) sampled the City of
Dubuque Water Works' (Dubuque) drinking water as part of the State's action plan for Per -
and Polyfluoroalkyl Substances (PFAS), which includes 25 different compounds such as
PFOS and PFOA.
BACKGROUND
City of Dubuque (Dubuque Water Works) PFAS Results
On September 28, 2022, the City of Dubuque was informed by the Iowa Department of
Natural Resources that two of its shallow wells and finished water contain trace amounts of
3 of the 25 compounds tested.
The results are as follows:
Compound Detected, reported in Parts Per Trillion, ppt
Sample Location PFBA PFOA, interim PFOS, interim
health advisory level health advisory level
0.004 ppt 0.02 ppt
Dubuque Finished 14 4.6 <4.0
Water Tap
Well No. 3 20 6.3 5.8
Well No. 9 12 <4.0 <4.0
According to USEPA, the PFOA and PFOS interim health advisories are intended to be in
place during the time interval between initial understanding of health effects and publication
of the final health advisory or maximum contaminant level goal (MCLG) and National
Primary Drinking Water Regulation. EPA anticipates proposing a National Primary Drinking
Water Regulation by the end of 2022 and finalizing it by the end of 2023. EPA's health
advisories are non -enforceable and non -regulatory.
DISCUSSION
Proactive Steps
In compliance with Iowa DNB's testing protocol, the Water Department operations staff will
be sampling and testing quarterly.
In addition, we have taken proactive measures and tested the three shallow wells not tested
during the initial testing in August for PFAS compounds, along with two deep wells (two
additional deep wells were out of service for maintenance at the time of sampling and so
were not tested) and we retested the final water. Results of the testing are as follows:
Results Dated 11 /15/2022
Lab: Eurofins, Lancaster, PA
Dubuque Finished Water Tap
Compound Detected, reported in Parts Per
Trillion, ppt
PFOA, interim PFOS, interim
PFBA health advisory health advisory
level 0.004 ppt level 0.02 ppt
17 4.9 4.3
SHALLOW WELLS
Well No. 2 15 3.3 4.1
Well No. 4 35 12 0.59
Well No. 10 18 86 110
DEEP WELLS
Well No. 5 ND ND ND
Well No. 6 ND ND ND
*ND — Not Detected
The results continue to support the initial discovery that the shallow wells (Wells 2, 4, and
10) are impacted by PFAS compounds. Deep wells 5 and 6 are showing no impacts of
PFAS contamination.
I have also been in contact with Strand Associates, the engineering firm currently
performing the Water Treatment Plant Condition and Process Assessment regarding a
proposal for an engineered solution for treating or removal of PFAS at the plant. The intent
is that it would be desirous to implement a solution as soon as feasible. There are two
potential solutions, one would be continuing the use of the shallow wells and install filter
media capable of PFAS removal at the plant and the second would be to abandon the
shallow wells and drill new deep wells absent of PFAS, eliminating the need to change out
filter media. Strand's proposal and scope of work would include the following:
• Evaluate treatment using Granular Activated Carbon, Ion Exchange, and Reverse
Osmosis based on current flows, PFAS levels, and current water quality parameters
to not alter or impact the optimized corrosion control used for the protection of lead
service lines
• Determine the ability to upgrade or retrofit the existing filter basins and/or review any
additional space needs for each treatment alternative adequate to treatment 13
million gallons per day up to 20 million gallons per day
• Develop conceptual design criteria and process flow schematics
• Evaluate the overall water quality from each treatment alternative including potential
modifications to the existing treatment processes
• Review the potential to abandon the PFAS impacted wells and the replacement of
new deep wells
• Prepare an opinion of probably construction costs for the three -treatment alternative
and for the abandonment of PFAS impacted wells and the advancement of new
deep wells and associated piping to the water treatment plant
Strand Associates will provide the above detailed analysis and costs estimates in the lump
sum amount of $59,900.
BUDGET IMPACT
Due to the emergent nature of the project, funding will need to be identified from an existing
capital improvement that can be rescheduled to a later fiscal year. Funding would be
available from capital improvement project 4281000011-Weber Property Phase 1 and 2.
Water main improvements associated with the Weber Property Phase 1 and 2 have been
rescheduled in upcoming budget cycles. Funding available in the CIP is $800,000, and
therefore is sufficient to cover the proposed Strand Associates expense of $59,900.
Action
I respectfully request authorization and execution of the attached task order to enter into an
agreement with Strand Associates to evaluate the City of Dubuque's PFAS and PFOA
results and evaluate water treatment processes for the removal of PFAS contaminants at
the Eagle Point Water Treatment Plant in the lump sum amount of $59,900.
Attachment: Strand Associates Task Order No.22-07
Cc: Crenna Brumwell, City Attorney
Cori Burbach, Assistant City Manager
Jennifer Larson, Director of Budget and Finance