HomeMy WebLinkAboutTask Order No. 10148A with SPF Water Engineering for WWTP TWAS Pumping and Centrate System ImprovementsTASK QRDER NO. 'I Q148a
CITY OF MERIDIAN (OWNER}
AND
SPF WATER ENGINEERIN+~ (ENGINEER}
This Task Order is issued by Owner and accepted by the Engineer pursuant to the mutual
promises, covenant and conditions contained in the Master Agreement between the above named
parties dated April 13„ 2010.
CITY 4F MERIDIAN
WASTEWATER TREATMENT PLANT
TWAS Pumping and centrate System Improvements Design
PURPOSE
The Engineer's scope of services, time of completion and compensation shall be as set forth
herein. Services shalt generally be described as engineering services to prepare construction
bidding documents and provide construction services for improvements to the existing DAFT No, 2
TWAS pumping system,. the centrate equalization system, separation of the TWAS and primary
sludge digester feed piping, and partial site grading. and paving.
The Engineer's scope of services shad include the following subtasks. The subtasks below involve
developing two separate pro}ect bid packages. One bid package will include the mechanical, yard
piping, electrical, and instrumentation upgrades for the TWAS pumping system, centrate
equalization system, and TWAS and primary sludge digester feed piping modifications. The
second bid package will include partial site grading and paving.
Subtask 1. TWAS Pumping, centrate System, TWAS and Primary Sludge Feed Separation.
Based on recommendations outlined in the TWAS Pumping and centrate System engineering
evaluations prepared by SPF, we will develop bidding documents (plans and specifications) for the
improvements. The design documents will include the following improvements:
• Yard piping necessary to separate primary sludge and TWAS feed to Digesters No. 4 and 5.
• Modifications necessary in the Digester No. 1 and 2 piping to separate primary sludge and
TWAS feed to Digesters No. 4 and 5.
• Adding valves, flow meters, and piping within Digester No. 4 and 5 mechanical room to
control and monitor sludge feed.
• Improvements to the DAFT No. 2 TWAS pump station to minimize discharge pipe vibration,
add suction piping manual air release and flushing provisions, add suction piping inlet
pressure stabilizers, and add real-time pressure monitoring (suction and discharge) for both
TWAS pumps.
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• Improvements to the centrate equalization system and pump station will involve adding a
~``~ third pump in the existing pump station to allow controlled feed out of the centrate tank into
the plant drain system.
The plans and specifications will include mechanical, electrical, and instrumentation requirements
necessary for competitive bidding purposes. Subtask 1 deliverables include:
• 90 Percent Draft Design Documents for City Review
• Final Design Documents for Bidding
• Project As-Builts
The anticipated schedule for Subtask 1 is:
• Notice to proceed -April 27, 2010
• 90 percent review documents to City -May 25, 2010
• Final bidding documents -June 8, 2010
• Bidding period -June 8, 2010 through June 24, 2010
• Construction notice to proceed -July 8, 2010
• Construction -July through September
Subtask 2, Site Grading and Paving. Prepare bidding documents (plans and specifications) for
grading and paving areas of the wastewater treatment plant site as generally shown on Exhibit A.
In general, site grading and paving activities will replace the existing crushed asphalt gravel roads.
A site survey will be conduc#ed for design purposes.
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Subtask 2 deliverables include:
• 90 Percent Draft Design Documents far City Review
• Final Design Documents for Bidding
• Project As-Builts
The anticipated schedule for Subtask 2 is:
• Notice to proceed -- Apri127, 2010
• Site survey -completed by May 11, 2010
• 90 percent review documents to City -June 8, 2010
• Final bidding documents --June 22, 2010
• Bidding period -June 22, 2010 through July 15, 2010
• Construction notice to proceed -July 29, 2010
• Construction -August through September
COMPENSATION
The Not-to-Exceed amount for the engineering design and construction services to complete fhis Task
Order No. 10148a is sixty two thousand five hundred dollars ($62,500.00).
The hourly rate for services and direct expenses are per the Master Agreement, and by this reference
made a part hereof.
CITY OF MERIDIAN
BY: a%-~ ~ i
TAMMY ERD, MAYOR
ENGINEER
TIM RRELL, MA AGER
Dated: ~/ ~.-r ~a c ra Dated: !/`y ' l q " 20~D
Approved by City Council: (~~ ~ ,` ~ ~~/~j ~,~~/
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KEITH WATT PURCHi~(SING AGENT
Dated: LI " Z 3 ` ~
TITLE: ~~J' ~ ~°~l C ~ y E~ i ARR~
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