HomeMy WebLinkAboutTask Order 10519b with Mountain Waterworks Inco for WRRF Centrate ModificationsTASK ORDER NO. 10519.b
Pursuant to the
MASTER AGREEMENT FOR PROFESSIONAL SERVICES
BETWEEN
CITY OF MERIDIAN (OWNER) AND MOUNTAIN WATERWORKS, INC (ENGINEER)
This Task Order is made this 14th day of July, 2015 and entered into by and between the City
of Meridian, a municipal corporation organized under the laws of the State of Idaho, hereinafter
referred to as "City", and accepted by (MOUNTAIN WATERWORKS, INC), hereinafter referred
to as "Engineer" pursuant to the mutual promises, covenant and conditions contained in the
Master Agreement (Category 2a) between the above mentioned parties dated October 1,
2014. The Project Name for this Task Order 10519.B is as follows:
CITY OF MERIDIAN
WRRF Centrate Modifications
Preliminary Engineering Report
PROJECT UNDERSTANDING
The Engineer's scope of services, time of completion and compensation shall be as set forth
herein. This Task Order is for professional engineering services generally related to preparing
a preliminary engineering report (PER) for centrate modifications at the City's WRRF.
SCOPE OF WORK
Centrate generated from solids dewatering at the City's WRRF contains high ammonia and
phosphorus concentrations. Currently, centrate is stored in a dedicated equalization tank and
returned to the head of the plant over a 24-hour period. The existing bolted steel centrate tank
is at the end of its useful life and redundancy is limited. The WRRF is able to meet current
permit conditions for nutrient limits. More stringent future nutrient permit limits will be
challenging and through modeling of the plant's performance, modifying the centrate return
has been shown to significantly increase nutrient removal, specifically ammonia reduction.
A PER will be developed by the Engineer to evaluate various options for centrate
modifications. In general, the options will include the following components:
• Centrate storage and equalization (i.e. above ground tank versus below grade tank)
• Site location considerations
• Relocating centrate return from the head of the plant to the aeration basins and/or RAS
holding tank
• Centrate pump station
Task Order 10519.6 WRRF Centrate Modifications PER Page 1 of 3
Mountain Waterworks, Inc
• Centrate storage mixing
• Struvite mitigation measures
• Future side stream treatment considerations
• Future WRRF expansion considerations
Alternatives for centrate storage, pumping, facility location, and return will be developed in the
PER. A basic site plan, preliminary cost estimates, and an evaluation of economic and non-
economic factors for each alternative will be included. Biowin process modeling will be
completed by Engineer to evaluate centrate return location and timing to optimize nutrient
removal. Engineer will work with other consultants as needed to coordinate centrate
modification options.
Project deliverables include:
• Draft PER for City review and approval
• Final PER for implementation of project design
The anticipated schedule is as follows:
• Draft PER to City — within 90 days of receipt of Notice to Proceed
• Final PER to City —within 30 days of receiving City comments on draft PER
ASSUMPTIONS
The following tasks are not included within the scope of work:
• Hydrology and hydraulic studies
• Site survey
• Design engineering services and construction support
• Geotechnical testing
• City to provide Biowin process model
TIME OF COMPLETION and COMPENSATION SCHEDULE
The following schedule is based on a Notice to Proceed (NTP) from the City by July 2015 and
resulting in Final Design being completed by November 2015. A NTP issued on a different
date will change the schedule accordingly.
COMPENSATION AND COMPLETION SCHEDULE
Task
Description
Due Date
Compensation
1
Draft and Final PER
• Estimated within 120 days of Notice to
Proceed
_ $61,680
TASK ORDER TOTAL $61,660.00
Task Order 10519.8 WRRP Cenlrate Modifications PER Page 2 of 3
Mountain Waterworks, Inc
The Not-To-Exceed amount to complete all services listed above for this Task Order No.
10519.6 is sixty one thousand six hundred eighty dollars ($61,680.00}. No compensation will
be paid over the Not-to-Exceed amount without prior written approval by the City in the form of
a Change Order. Monthly invoices shall be billed as a percentage of work completed. Any
and all travel will only be reimbursed if pre-approved by the Project Manager, and only per the
City of Meridian Travel Policy. Reimbursable expenses will be paid at cost and only if pre-
approved by the Project Manager, and accompanied by an itemized receipt. Any travel and/or
reimbursables paid will bepaid as part of the Not-To-Exceed Task Order Total per the
Compensation and Completion Schedule above.
CITY OF MERIDIAN MOUNTAIN WATERWORKS, INC
BY:14111111 // - _
- -- BY:
TAMMY deers MAYOR TIM FARRELL, P. E.
Dated:�l-Ay 1 't, Dbl.- i. =d: 07/02/2015
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Approved by Council: 1 k. j ~ - ( yGw
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BY: �, r BY: r, -.
KEIT S, Pu asing Manager WA S EWART, Engineering Manager
Dated: -77T/145
City Project Manager
David Allison
Task Order 10519.8 WRRF Centrale Modifications PER Pages of 3
Mountain Waterworks,Inc