HomeMy WebLinkAboutSole Source Purchase Hidrostal Influent Submersible Pumps Page 1
Memo
To: C.Jay Coles, City Clerk,
From: Keith Watts, Purchasing Manager
CC: Emily Skoro
Date: 10-5-2016
Re: October 11 th City Council Meeting Agenda Item
The Purchasing Department respectfully requests that the following item be placed on the
October 11 th City Council Consent Agenda for Council’s consideration.
Approval of a Sole Source Purchase for Hidrostal Influent Submersible Pumps for the
WRRF Capacity Expansion Project.
Recommended Council Action: Approval of Sole Source Procurement upon
completion of advertising per Idaho State Statute 67-2808.
Thank you for your consideration.
City of Meridian
Purchasing Dept.
11L "r
E ( IDIAN
Public
• Department
TO: Keith Watts
FROM: Emily Skoro
Staff Engineer II
DATE: 8/30/2016
Mayor Tammy de Weerd
City Council Members
Keith Bird
Joe Borton
Whe Cavener
Genesis Milam
Anne Little Roberts
Ty Palmer
SUBJECT: Hidrostal Influent Submersible Pumps with Prerostal Intake Basins -Sole
Source Supplier Hidrostal
1. DEPARTMENT CONTACT PERSONS
Emily Skoro, Staff Engineer II 489-0356
Clint Dolsby, Assistant City Engineer 489-0341
Warren Stewart, City Engineer 489-0350
Tom Barry, PW Director 489-0372
II. DESCRIPTION
A. Describe Item
Influent pumping of raw sewage is one of the initial steps in the treatment process
for municipal wastewater at the Meridian Wastewater Resource Recovery
Facility. As such, it is critical these pumps be designed to pass solids through to
downstream treatment processes and be easy to maintain should a pump become
plugged with debris. An influent pump station is designed to meet peak hour
capacity with one pump out of service, so down time for maintenance cannot be
extended beyond a few hours.
Two types of influent pumping systems were considered for the Headworks
Capacity Expansion project: Hidrostal Submersible Pumps with Prerostal Intake
Basins and Vertical Turbine Solids Handling (VTSH) Pumps. While both
systems have good capability of passing solids through to downstream treatment
processes, the Hidrostal Submersible Pumps offers the following advantages over
the VTSH Pumps:
Page I of 2
• A shallower pump station wet well as cleaning occurs within each pump's
prerostal intake basin. VTSH pumps have a deeper wet well which adds
unnecessary cost and construction risk.
Easy removal from the wet well for maintenance purposes. The guiderail
system will allow staff to pull the pumps for service with existing
maintenance equipment. This is advantageous because operations would
not have to purchase any additional equipment or rent equipment to
perform maintenance on the pumps. VTSH pumps require a crane to lift
the pumps from the wet well which means more time and money as the
crane would be rented ($2500) each time maintenance is required.
Freeze -free bearings. Submersible pumps do not require lubrication of the
pump shaft bearings as they are immersed in water. This eliminates
building an approximately $400,000 enclosure that would be required if
purchasing the VTSH pumps as they have had freezing issues if not
protected from the weather.
Based on the comparison of Hidrostal and VTSH pumps, the Public Works
Department recommends procuring Hidrostal Submersible Pumps with Prerostal
Intake Basins.
The Public Works Department requests a sole source procurement as there is no
functional equivalent for the Hidrostal Influent Pump with Prerostal Intake Basin
only available through Hidrostal.
Departmental Approval: /
Page 2 of 2
E IDIAN
PURCHASING AGENT
33 East Broadway Avenue
Meridian, lD 83642
Phone: 208-8884433 Fax: 20&887-48'13
Date: 6i13l2016
Item or Service: Hidrostal Influent Submersible Pumps with Prerostal lntake Basins
X Sole Source Item is available from only one vendor.
item and is not sold through distributors
sole distributor.
Item is one-of-a kind
Manufacturer is a
Refer to instructions on 2nd page for completion.
JUSTIFICATION: (Attach additional pages if needed)
lnfluent pumping is one of the initial steps in the treatment process for municipal wastewater. As such,
it is critical that these pumps be designed to pass solids through to downstream treatment processes
and be easy to maintain should a pump become plugged with debris. The influent pump station will be
designed to meet peak hour capacity with one pump out of service, so down time for maintenance
cannot be extended for lengthy durations.
Two types of influent pumping systems were considered for the Headworks Capacity Expansion
project: Hidrostal Submersible Pumps with Prerostal lntake Basins and Vertical Turbine Solids
Handling (WSH) Pumps. While both systems have good capability of passing solids through to
downstream treatment processes, the Hidrostal Submersible Pumps offer the following advantages to
the WSH Pumps:
Shallower pump station wet well as cleaning occurs within each pump's prerostal intake basin.
VTSH pumps require an ogee ramp to create a hydraulic lump for cleaning. lnstallation of the
ogee ramp adds depth to the pump station wet well.
Submersible Hidrostal pumps are more easily removed from the wet well for maintenance
purposes. The guiderail system will allow staff to pull the pumps for service with existing
maintenance equipment. WSH pumps would require a crane to lift the pumps from the wet well
for access and maintenance purposes. Relying on crane removal/replacement of the pumps
could extend their down time period.
Submersible pumps do not require lubrication of the pump shaft bearings as they are immersed
in water. Operations and maintenance staff have experienced freezing issues with a seal water
IDAHO
CITY OF MERIDTAN
SOLE SOURCE FORM
lubrication system on existing VTSH pumps at the WRRF. Utilizing Hidrostal pumps will
eliminate the need for a building enclosure or other means of freeze protection around the pump
station wet well.
Based on the comparison of Hidrostal and VTSH pumps, the Public Works Department recommends
procuring Hidrostal Submersible Pumps with Prerostal Intake Basins.
The Public Works Department requests a sole source procurement as there is no function equivalent
for the Hidrostal Influent Pump with Prerostal Intake Basin.
CERTIFICATION:
I am aware of the requirements set forth in the City's Purchasing Policy & Procedures Manual for competitive bidding and the
established criteria for justification for sole source/sole brand purchasing. I have gathered technical information and have made
a concerted effort to review comparable/equal equipment. I hereby certify as to the validity of the information and feel confident
that this justification for sole source/sole brand meets the City's criteria and is accurate.
Council ApprovalJ// �//
Date: I b
ZstorPr' dame)
Purchasing
Approval: 1-1
Department Manager Signature Purch ng Manager