HomeMy WebLinkAboutAECOM-Supplemental Agreement-11.09.2009 AECOM
AECOM
501 Sycamore Street,Suite 222,Waterloo, Iowa 50703
T 319.232.6531 F 319.232.0271 www.aecom.com
SUPPLEMENTAL AGREEMENT NO. 1
WASTEWATER POLLUTION CONTROL SYSTEM REVIEW
WATERLOO, IOWA
WHEREAS, a Professional Services Agreement was entered into between the City of Waterloo, Iowa,(Client)and
AECOM Technical Services, Inc.(ATS), of Waterloo, Iowa, dated June 15, 2009,for the review of various aspects
of the Wastewater Pollution Control System for the City of Waterloo, Iowa; and
WHEREAS, the Client and ATS now desire to enter into Supplemental Agreement No. 1 for review of additional
portions of the Wastewater Pollution Control System.
NOW THEREFORE, it is mutually agreed to amend the original Professional Services Agreement as follows:
I. PROJECT DESCRIPTION
The project includes computer simulation of the Wastewater Pollution Control Facility(WPCF)to ascertain
capacities and limitations at the facility, an evaluation of the maintenance issues and start-up procedures
needed to recommission the Satellite Treatment Facility at the WPCF, an evaluation and design of
improvements to the Raw Wastewater Pumping Station at the Anaerobic Lagoon,and a feasibility analysis
of constructing an"alternative"Wastewater Treatment Facility to serve the area near the Waterloo Airport.
II. SCOPE OF SERVICES
1. Evaluation of Plant Capacity and Nitrogen Removal Using Computer Simulation
Overview of BioWin, Including Benefits and Uses
ATS will use the BioWin Process Simulator for modeling the Easton and Satellite Water Pollution
Control Facilities. The BioWin Process Simulator is a computer program which allows
construction of models to simulate both steady state and dynamic performance of treatment
facilities. BioWin can be used to optimize the design of new facilities and to evaluate the operating
strategies and performance of existing facilities to achieve substantial capital and operational cost
savings. The process models used in BioWin have been validated on full-scale facilities. One of
the strengths of BioWin is its accurate simulation of the biological nitrogen removal process,which
is especially valuable for this evaluation.
Scope
a. Evaluate historic;influent flows and loadings for both domestic and industrial flow streams
to the facilities. This data will be used to set up the framework of the influent
characterization for the simulator.
b. Evaluate historic;operations data and receive input from the operations staff to set up the
framework of the existing plant simulation and calibration.
c. Develop a plant monitoring program to measure necessary characteristics of influent and
process streams that are not included in historic data.
d. Analyze the data from the monitoring program to complete the characterization necessary
for the simulator.
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e. Develop a model of the existing Easton and Satellite WPCF using the BioWin Process
Simulator.
f. Calibrate the model using operations data and monitoring program results, along with
input from the staff on operating strategies.
g. Conduct a mid-course review meeting to present the results of the model set-up and
calibration and discuss simulations to be conducted.
h. Simulations will be conducted at three conditions:
1) Existing Flows and Loadings
2) Design Basis Flows and Loadings
3) One Intermediate Condition Between Existing and Design Conditions Where
Only a Portion of the Satellite WPCF is in Service
The simulations will focus on operation of the facilities to achieve optimal nitrogen
removal to meet the new total nitrogen effluent limitations in Waterloo's draft
NPDES permit. The model will use a blended influent stream of domestic and
industrial wastewater to minimize the need for supplemental alkalinity.
j. Results, conclusions and recommendations will be presented in a draft Technical
Memorandum and delivered to the Client for review.
k. A workshop will be held to review and discuss the Technical Memorandum with the
Client.
The Technical Memorandum will be revised to incorporate the comments from the Client
and delivered as a final document to the Client.
2. Recommissioning of Satellite Treatment Facilities at the Waterloo WPCF
a. Review design and current condition of existing treatment basins, equipment, pumping
systems, piping(including valves and gates),and controls of existing secondary treatment
facilities at the Satellite Facilities.
b. Coordinate with existing equipment manufacturers and obtain recommendation for
placing existing equipment back into service.
c. Prepare estimate of probable capital costs associated with placing existing equipment
back into service.
d. Prepare letter report summarizing work and associated capital costs required to
recommission existing treatment facilities and equipment.
e. Prepare a start-up plan for placing existing facilities back into service. Plan to include
multi-day system demonstration with clear water prior to introducing wastes into the
system.
AECOM
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f. Review results of system demonstration to ensure treatment facilities are ready to receive
wastewater flow.
g. Prepare letter report to Iowa DNR describing and summarizing capacity issues and future
operation of treatment facilities to maintain operating efficiency. Assist Client in
responding to and resolving concerns raised by the Iowa DNR.
Assumptions
a. Existing aeration basin will be required to be completely dewatered to allow review of
existing aeration piping system.
b. Existing diffuser membranes will need to be removed and replaced with new diffuser
membranes in one aeration basin.
c. Waterloo WPCF operating and maintenance staff will complete the work associated with
recommissioning and restarting process equipment.
d. Equipment manufacturer's field services required for review or evaluation of existing
process systems or equipment are not included.
3. Pumping Station Rehabilitation and Anaerobic Lagoon
a. Perform review of the existing raw wastewater pumping facilities to determine extent of
corrosion and degradation of existing structure, pumping equipment and related piping.
b. Meet with Client and discuss and identify alternatives for upgrades to the existing
pumping facilities to ensure continued system capacity and reliability. Upgrades may
include rehabilitation of or additions to the existing pumping facilities.
c. Based on the results of review and meeting with Client, prepare a Technical
Memorandum detailing findings of the review and evaluate alternatives for upgrading the
existing pumping facilities.
d. Attend meeting with Client to present Technical Memorandum and obtain consensus of
appropriate course of action for upgrades to the existing pumping facilities.
e. Prepare preliminary design and estimate of probable construction costs of upgrades to
the existing pumping facilities.
f. Submit preliminary design of the upgrades to the existing pumping facilities to Client for
review and comment.
g. Prepare and submit letter report to the Iowa Department of Natural Resources (Iowa
DNR) documenting the need to complete upgrades to the existing pumping facilities to
ensure continued system capacity and reliability. Assist the Client in obtaining department
approval to construct the recommended upgrades to the existing pumping facilities.
h. Incorporate Client and Iowa DNR comments and prepare final design of upgrades to the
existing pumping facilities. Prepare bidding documents (plans and specifications)
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necessary to obtain competitive bids for the construction of the upgrades to the existing
pumping facilities.
Prepare final estimate of probable construction costs of upgrades to the existing pumping
facilities.
j. Provide up to five (5) sets of reduced size (11"x17") plans and specifications for use by
the Client.
k. Provide bidding documents to prospective bidders.
Provide bidding coordination for one prime construction contract, which includes
responding to contractor questions and preparation of appropriate addenda.
m. Attend bid opening, prepare bid tabulation and make recommendation to Client on
contract award.
n. Assist Client in assembling the Contract Documents for execution by Client and
contractor, and furnish copies of the executed Contract Documents to the Client,
contractor and appropriate regulatory agencies.
o. Provide up to five (5) full-size (22"x34") sets of plans and specifications for use by the
contractor during construction.
4. Feasibility Analysis of a Wastewater Treatment Facility to Serve the Area Near the Waterloo
Airport
a. Meet with Client staff to review development plans for the area near the Waterloo Airport
and estimate wastewater flows and loadings from the proposed development.
b. Evaluate possible alternative wastewater treatment options for the projected flows and
loadings. The options to be considered will involve alternatives without surface water
discharge and minimal operating costs.
c. Review alternative treatment options with Iowa DNR to obtain preliminary approval.
d. Evaluate benefits to the existing sanitary sewer system by implementing an alternative
treatment option and reducing flows on the sanitary sewer.
e. Coordinate proposed treatment facility location with the airport and proposed development
in the area.
f. Prepare a cost estimate for the alternative treatment facility and present a comparison
against the costs of expanding the current sanitary sewer system serving the area.
g. Prepare a final report summarizing pertinent data,costs and recommendations regarding
the alternative treatment facility.
h. Present the report to the City Council for approval and meet with Iowa DNR to review the
proposed alternative treatment system to obtain approval to proceed.
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III. COMPENSATION AND PAYMENT
Compensation for the above services shall be integrated with the compensation defined in the Professional
Services Agreement dated June 15, 2009. The estimated additional compensation of One Hundred
Sixteen Thousand Dollars ($116,000.00) shall not be exceeded without authorization from the Client.
IV. In all other respects, the obligations of the Client and the Consultant shall remain as specified in the
Professional Services Agreement dated June 15, 2009.
IN WITNESS WHEREOF, the parties hereto have executed this Supplemental Agreement No. 1 as of the dates
shown below.
CITY OF WATERLOO, IOWA AECOM TECHNICAL SERVICES, INC.
By: By: D-r"
y J. Hurley/ Joe A. Becker
Mayor / Vice President
Date: NOVQ ► 0-tro I Date: November 2, 2009
ATTEST:
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