HomeMy WebLinkAboutPACE Engineers, Inc - PWRF Embankment Repair Project - Addendum No. 2 (Agreement No. 20-035)ADDENDUM No. 2 TO PROFESSIONAL SERVICES AGREEMENT FOR
PWRF Embankment Repair Project
AGREEMENT NO. 20-035
WHEREAS, the City of Pasco (City) and PACE Engineers, Inc. (Contractor) entered
into a Professional Services Agreement No. 20-035 on August 13, 2020 to provide engineering
services with respect to the PVWRF Embankment Repair Project.
WHEREAS, the City of Pasco (City) and PACE Engineers, Inc. (Contractor) have the
contractual authority to permit or deny modifications of the Professional Services Agreement
No. 20-035 per Section 17 of that Agreement; and
WHEREAS, the City and the Contractor entered into the first Addendum to the
Professional Services Agreement No. 20-035 on September, 17, 2020; and
WHEREAS, all parties to this agreement agree that this second addendum will not
modify or change any other terms (including any references to terms and conditions that are in
conflict) of the professional services agreement (Agreement No. 20-035) not covered by this
Addendum, which is attached.
NOW, THEREFORE, the agreement is modified by this Addendum No. 2 to allow PACE
Engineers, Inc. to provide additional engineering services as described on Exhibits A and B.
Scolre of Work:
See Exhibits A and B, (excluding any references to terms and conditions that are in
conflict with terms and conditions of Agreement No. 20-035).
Fee:
The compensation for the additional work is based on a Fixed Fee Basis of $49,335.00,
increasin,a the overall total authorization amount to $127,618.00.
Time of Performance:
No Change.
Addendum No. 2 to Agreement for Professional Services No. 20-035
IN WITNESS WHEREOF, the parties have executed this Addendum No. 2 on the
11s day of Semcrr
Q20.
CITY:
CONTRACTOR:
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City of Pasco PA CE Engineer. , Inc.
Dave Zabell, City Manager Robin D. Nelson, PE
Approved as to Forrn:
K erguson Law, PLLC
ity Attorney
Addendum No. 2 to Agreement for Professional Services No. 20-035
LAHIB1T A
Engineers I Planners I Surveyors
PACE
M Engineering Services Company
9/29/2020
Michael White, P.E.
City of Pasco
525 N. 3rd Ave
Pasco, WA 99301
Subject: PWRF Dike Repair
Proposal for Geotechnical Design Services — Additional Services Agreement #2
Dear Mr. White:
PACE Engineers, Inc., (PACE) appreciates the opportunity to submit this budget proposal for
providing Geotechnical Engineering Services for the PWRF repair project based on the information
you have provided to our team.
Scope of Work
Please see Exhibit "B," geotechnical engineering services scope from Shannon & Wilson.
Fee Estimate
We propose to provide the services listed above on a fixed fee basis for a total of $49,335 in
accordance with the attached geotechnical engineer's proposal, Exhibit "B".
The breakdown for the above fee is $42,900 shown on Exhibit "B" plus PACE's standard 15%
subconsultant markup as set forth in the prime contract.
The above scope of work and related fee has been based on the following assumptions:
The City shall provide required access to the site when and/if necessary.
Please see "Assumptions" section of "Exhibit B" for meeting, field work, and delivery assumptions.
The following services are not included in this proposal:
Geotechnical or Civil Engineering Construction or Construction Services.
In summary, we have developed a scope of work and budget based on our present knowledge of the
project. We have tried to cover all aspects of the proposed project; however, if you feel that additional
areas of work require our attention, if you have any questions, or if you desire additional information
please do not hesitate to contact us.
PACE Engineers, Inc.
11255 Kirkland Way I Suite 300
Kirkland; Washington 98033-3417
p 425.827.2014 1 ! 425.827.5043
www.paceengrs.com
9/29/2020 Engineers I Planners I Surveyors
Michael White, P.E.
City of Pasco
Page 2 of 2 www.paceengrs.corn
Again, we are pleased to submit this proposal for the subject project and look forward to working with
you.
Sincerely,
PACE Engineers, Inc.
Jonathan R. Archibald
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EXHIBIT B
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SHANNON
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CONSULTANTS
September 25, 2020
Mr. Jonathan Archibald, PE
Senior Project Manager
PACE Engineers
1 "1255 Kirkland Way, Suite 300
Kirkland, Washington 98003
RE: PROPOSAL FOR DESIGN PHASE GEOTECHNICAL SERVICES (REV. 0):
PROCESSED WATER REUSE FACILITY EMBANKMENT REPAIR, FRANKLIN COUNTY,
WASHINGTON
Dear Mr. Archibald;
Shannon & Wilson is pleased to submit this geotechnical proposal for the City of Pasco's
(City) Process Water Reuse Facility (PWRF) emergency embankment repair design phase
services.
BACKGROUND
The PWRF is located approximately 11h miles northeast of the intersection of US 395 and
Foster Wells Road in Franklin County, Washington. The PWRF facility treats process
wastewater from multiple vegetable processors (e.g., carrots, onions, potatoes, and others)
on the west side of US 395 and disperses the treated water back onto local agricultural
fields.
As of November 2019, five food processors discharged process wastewater to the PWRF,
with the potential for others to be added if planned additional treatment capacity is
implemented. Process wastewater is conveyed to the PWRF via underground pipelines. At
the PWRF, wastewater passes through two rotary drum screens to separate out suspended
solids, is discharged into one of three sedimentation basins, and then applied across 14 crop
circles owned by the City of Pasco (City). Supplemental fresh well water is mixed with
treated process wastewater as needed to meet crop water requirements. Screened solids are
collected and hauled offsite for use as livestock feed or landfill disposal.
We understand the processed water typically exhibits high nitrates and low pH, but the
composition typically varies based on the vegetables being processed at the time.
2705 Saint Andrews Loop ■ Suite A ■ Pasco, Washington 99301-3378 ■ 509 543-2860 ■ Fax 509 492-5970
■ y:ww.OicinriJnwllsorl.ci!rii ■
Mr. Jonathan Archibald, PE
PACE Engineers
September 25, 2020
Page 2 of 6
9111 SHANNON WILSON
On June 27, 2020, PWRF staff discovered an embankment failure between the 8 million
gallon (MG) and 35 MG ponds. The liner and embankment failure included:
■ Ripping the existing liner around a recently installed overflow pipe on both sides of the
embankment (8 MG and 35 MG pond sides);
■ Releasing an unknown quantity and composition of process wastewater from the 8 MG
pond into the 35 MG pond;
■ Spreading approximately 1,000 to 1.,500 cubic yards (yd3) of embankment materials into
the 35 MG pond, predominantly flowing below the 35 MG pond liner; it is unknown if
embankment failure materials also flowed beneath the 8 MG pond liner.
At some point prior to the embankment failure, but after the overflow pipe installation, we
understand the City identified a hole in the 8 MG pond liner. Temporary repairs have been
made to the embankment and liner on the 8 MG pond side to allow PWRF operations to
continue; no repairs have been made on the 35 MG pond side.
The Washington State Department of Ecology (Ecology) requests the City evaluate what
impact, if any, the leak had on local groundwater and the potential for the soils that were
saturated with the wastewater to develop off -gassing that would impact the pond liner. We
also understand Dam Safety has been advised of the embankment failure and will be
involved throughout embankment mitigation.
The City has contracted with PACE Engineers (PACE) for embankment repair design
services. Shannon & Wilson completed a Preliminary Geotechnical Report dated
September 4, 2020 which summarized the embankment failure, relevant/available
geotechnical information for the PWRF facility, and recommended future geotechnical and
environmental explorations. We also participated in a conference call with Ecology to
discuss the geotechnical and environmental scoping on September 10, 2020.
PROPOSED SCOPE OF SERVICES
The proposed scope of geotechnical services outlined in this letter is to:
■ complete geotechnical borings in the bottom of the 35 MG pond and at the top of the
8 MG/35 MG embankment (authorized September 23, 2020),
■ perform geotechnical index laboratory testing on selected samples (authorized
September 23, 2020), and
■ complete geotechnical engineering analyses, including embankment stability in
accordance with the Office of Dam Safety guidelines.
1GS755003Y F.mbFaNim 105755-003.P
Mr. Jonathan Archibald, PE 0111SHMNONbWlLSON
PACE Engineers
September 25, 2020
Page 3 of b
■ Summarize results of the explorations, laboratory testing, and analyses in geotechnical
report.
Engineering and Reporting
Geotechnical
Shannon & Wilson will perform geotechnical engineering analyses and prepare a
geotechnical engineering report that summarizes our observations, explorations, laboratory
testing, and engineering analyses. In our report, we will provide:
■ A Summary of our exploration program, including methods and procedures, sampling
types and depths, and exploration logs with soil classifications and descriptions;
■ A boring location plan showing as -built locations;
■ Laboratory test results;
■ A discussion of the regional and local geology, subsurface conditions and groundwater
depth, if encountered;
■ A discussion of geologic hazards, including nearby slopes, faults, and liquefaction
potential;
■ Seismic design parameters based on the current International Building Code (IBC);
■ Estimate engineering properties of foundation and proposed embankment materials;
■ Estimate embankment settlement;
■ Evaluate embankment slope stability for the following conditions:
- during construction,
- end of construction,
- IBC maximum considered earthquake ground motion, and
- rapid drawdown;
■ Perform seepage analysis for assumed leaking pond liner;
■ Develop preliminary recommendations for seepage protection measures or connecting
to existing measures;
■ Temporary cut slope and permanent embankment slope inclination recommendations;
■ Geotechnical recommendations for liner design including interface stability analyses (for
the liner -soil interface below and above the liner), anchoring the liner at the top of slope,
placing protective soil cover on top of the liner, and other geotechnical specific aspects
of liner installation and system stability assessment;
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Mr. Jonathan Archibald, PE
PACE Engineers
September 25, 2020
Page 4 of 6
11ISHANNONbWILSON
■ Evaluate fill material shrink/swell to estimate earthwork volumes;
Grading recommendations including clearing and grubbing, temporary and permanent
excavations/slopes, minimum over -excavation vertical and horizontal dimensions,
subgrade and fill proof rolling, backfill and compaction requirements, borrow or fill
specifications relative to the location and locally available materials, and utility
excavations; and
■ Construction Considerations and Methods, as applicable, for dewatering, excavations,
sheeting or shoring, problematic subsurface soils encountered (such as swelling,
collapsing, dispersive, or similar conditions).
We will prepare an electronic copy of our initial draft geotechnical engineering report for
review by PACE and the City.
Review
Shannon & Wilson will review the initial draft review comments and provide responses
following receipt of the City and PACE review comments. After comment resolution on the
initial draft GER, we will prepare an electronic copy of the 2111, draft reports for review by
PACE, the City, and Dam Safety, and final report copies after comment resolution to the 2nd
draft GER. The final GER will be stamped by Professional Engineers registered in the State
of Washington.
DELIVERABLES
We will prepare the following deliverables for this scope of services:
• Initial Draft GER
• 2nd Draft GER
■ Final GER
ASSUMPTIONS
We have prepared the following list of assumptions that we used to develop our cost
proposal as it is currently presented:
■ Attendance/participation by Shannon & Wilson geotechnical staff is required in
approximately weekly project meetings.
■ All teleconferences will be coordinated and set up by others. Meeting minutes will be
prepared by others.
I0,5755 00V Fngr R 105755-003.P
Mr. Jonathan Archibald, PE
PACE Engineers
September 25, 2020
Page 5 of b
=III SHANNON &WILSON
■ Electronic deliverables will be provided; hard copies are available for a small fee.
■ Review comments to the initial draft and 2nd draft GER will be compiled and provided
all together.
■ Fieldwork will be accomplished in 4 field days or less; average minimum of 60 feet
drilled per day.
■ Laboratory analyses will be performed on a standard turn -around time.
■ The City will be responsible for disposal of investigation derived waste (IDW) if
generated.
■ Only digital copies of the GER will be required.
■ Two rounds of edits will be required to finalize the GER.
ESTIMATED SCHEDULE
Drilling will likely be completed on Wednesday, September 30, 2020. We estimate
laboratory testing will be complete about October 7. Shannon& Wilson is available to begin
geotechnical analyses at receipt of an authorized agreement. Our initial draft GER will be
available about 4 weeks after agreement. Our 2nd draft GER ,,vill be provided 5 business
days following receipt of the City and 1?ACE review comments. Our final GER will be
delivered within 7 business days after comment resolution to the 2nd draft report.
ESTIMATED FEE
Shannon & Wilson is prepared to undertake the scope of services presented in this proposal
on a time -and -materials basis in accordance with a mutually negotiated agreement. Our fee
for the services described in this proposal will be approximately $42,900 as outlined in the
enclosed cost estimate. The cost includes our labor and expenses for the work described in
this proposal through the submission of our final GER.
CLOSURE
General information is provided in the attached "Important Information About Your
Geotechnical/Enviroiunental Proposal," regarding the use and limitations of this proposal.
We appreciate the opportunity to submit this proposal and look forward to working with
PACE on this project. Please contact me at (509) 543-2566 or by email at cacti e,shanwil.com if
W57,11 003.r = : u F 105755 -003.P
Mr. Jonathan Archibald, PE
PACE Engineers
September 25, 2020
Page 6 of 6
111SHANNON WILSON
you would like to discuss our proposal, set up a time for negotiations, or authorize our
services.
Sincerely,
SHANNON & WILSON
Clinton A. Wilson, PE
Associate
CAW:WIP/caw
Enc. Consultant Fee Determination
Important Information About Your Geotechnical/Environmental Proposal
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Important Information
About Your Geotechnical Proposal
More construction problems are caused by site subsurface conditions than any other factor.
The following suggestions and observations are offered to help you manage your risks.
HAVE REALISTIC EXPECTATIONS.
If you have never before dealt with geotechnical or environmental issues, you should
recognize that site exploration identifies actual subsurface conditions at those points where
samples are taken, at the time they are taken. The data derived are extrapolated by the
consultant, who then applies judgment to render an opinion about overall subsurface
conditions; their reaction to construction activity; appropriate design of foundations, slopes,
impoundments, and recovery wells; and other construction and/or remediation elements.
Even under optimal circumstances, actual conditions may differ from those inferred to exist,
because no consultant, no matter how qualified, and no subsurface program, no matter how
comprehensive, can reveal what is hidden by earth, rock, and time.
DEVELOP THE SUBSURFACE EXPLORATION PLAN WITH CARE.
The nature of subsurface explorations—the types, quantities, and locations of procedures
used—in large measure determines the effectiveness of the geotechnical/environmental
report and the design based upon it. The more comprehensive a subsurface exploration and
testing program, the more information it provides to the consultant, helping to reduce the
risk of unanticipated conditions and the attendant risk of costly delays and disputes. Even
the cost of subsurface construction may be lowered.
Developing a proper subsurface exploration plan is a basic element of
geotechinical/environmental design that should be accomplished jointly by the consultant
and the client (or designated professional representatives). This helps the parties involved
recognize mutual concerns and makes the client aware of the technical options available.
Clients who develop a subsurface exploration plan without the involvement and
concurrence of a consultant may be required to assume responsibility and liability for the
plan's adequacy.
READ GENERAL CONDITIONS CAREFULLY.
Most consultants include standard general contract conditions in their proposals. One of
the general conditions most commonly employed is to limit the consulting firm's liability
Known as a "risk allocation" or "limitation of liability," this approach helps prevent
105755-003.P
5111 SHANNON &WILSON
problems at the beginning and establishes a fair and reasonable framework for handling
them should they arise.
Various other elements of general conditions delineate your consultant's responsibilities.
These are used to help eliminate confusion and misunderstandings, thereby helping all
parties recognize who is responsible for different tasks. In all cases, read your consultant's
general conditions carefully and ask any questions you may have.
HAVE YOUR CONSULTANT WORK WITH OTHER DESIGN
PROFESSIONALS.
Costly problems can occur when other design professionals develop their plans based on
misinterpretations of a consultant's report. To help avoid misinterpretations, retain your
consultant to work with other project design professionals who are affected by the
geotechnical/environmental report. This allows a consultant to explain report implications
to design professionals affected by them, and to review their plans and specifications so that
issues can be dealt with adequately. Although some other design professionals may be
familiar with geotechnical/environmental concerns, none knows as much about them as a
competent consultant.
OBTAIN CONSTRUCTION MONITORING SERVICES.
Most experienced clients also retain their consultant to serve during the construction phase
of their projects. Involvement during the construction phase is particularly important
because this permits the consultant to be on hand quickly to evaluate unanticipated
conditions, conduct additional tests if required, and when necessary, recommend alternative
solutions to problems. The consultant can also monitor the geotechnical/environmental
work performed by contractors. It is essential to recognize that the construction
recommendations included in a report are preliminary, because they must be based on the
assumption that conditions revealed through selective exploratory sampling are indicative
of actual conditions throughout a site.
Because actual subsurface conditions can be discerned only during earthwork and/or
drilling, design consultants need to observe those conditions in order to provide their
recommendations. Only the consultant who prepares the report is fully familiar with the
background information needed to detennine whether or not the report's recommendations
are valid. The consultant submitting the report cannot assume responsibility or liability for
the adequacy of preliminary recommendations if another party is retained to observe
construction.
105755-003.P
5111SHANNON 6WILSON
REALIZE THAT ENVIRONMENTAL ISSLIES MAY NOT HAVE BEEN
ADDRESSED.
If you have requested only a geotechnical engineering proposal, it will not include services
needed to evaluate the likelihood of contamination by hazardous materials or other
pollutants. Given the liabilities involved, it is prudent practice to always have a site
reviewed from an environmental viewpoint. A consultant cannot be responsible for failing
to detect contaminants when the services needed to perform that function are not being
provided.
ONE OF THE OBLIGATIONS OF YOUR CONSULTANT IS TO PROTECT
THE SAFETY, PROPERTY, AND WELFARE OF THE PUBLIC.
A geotechnical/environmental investigation will sometimes disclose the existence of
conditions that may endanger the safety, health, property, or welfare of the public. Your
consultant may be obligated under rules of professional conduct, or statutory or common
law, to notify you and others of these conditions.
RELY ON YOUR CONSULTANT FOR ADDITIONAL ASSISTANCE.
Your consulting firm is familiar with several techniques and approaches that can be used to
help reduce risk exposure for all parties to a construction project, from design through
construction.. Ask your consultant, not only about geotechnical and environmental issues,
but others as well, to learn about approaches that may be of genuine benefit.
The preceding paragraphs are based on information provided by the ASFE/Association of
Engineering Firms Practicing in the Geosciences, Silver Spring, Niaryland
105755-003.P