HomeMy WebLinkAboutSole Soure Purchase for Grit Removal for WRRF Capacity ExpansionE IDIAN ,
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CITY OF MERIDIAN
SOLE SOURCE FORM
Date: 12/17/2015
PURCHASING AGENT
33 East Broadway Avenue
Meridian, ID 83642
Phone: 208-888-4433 Fax: 208-887-4813
Item or Service: Hydro International Headcell, Slurry Cup and Grit Snail
X Sole Source: Item is available from only one vendor. Item is one -of -a -kind
item and is not sold through distributors. Manufacturer is a
sole distributor.
Refer to instructions on 2 d page for completion.
JUSTIFICATION: (Attach additional pages if needed)
Grit removal is a typical liquids treatment process that removes heavy solids such as sand from municipal wastewater,
solids cause premature wear on downstream mechanical components and build-up in anaerobic digesters and aeration
basins, thus requiring periodic cleaning. The cleaning process is difficult and requires placing a unit out of service,
decreasing treatment capacity. The existing plant has two vortex type separators, but still experiences significant grit
buildup in the anaerobic digesters.
Two types of grit collection systems were considered for the Headworks Capacity Expansion project: vortex type
separators (e.g. Smith & Loveless Pista Grit) and Hydro International's Grit Removal System (Eutel( Headcell°, Tea Cup, and
Grit Snail). The advantages of using a Eutek Headcell®, Tea Cup, and Grit Snail instead of a vortex type separator are
summarized below.
The Hydro International's Grit Removal System has the following advantages when compared to a mechanically induced
vortex system like the existing units:
• Smaller facility footprint
• No moving mechanical components
• Operates efficiently over large flow ranges — the vortex type is maintained by an influent manifold
• Flexibility to increase capacity after initial installation by adding additional trays.
• Guaranteed more efficient grit removal compared to vortex type separators reducing grit build-up in aeration basins
and digesters.
Based on the comparison of technologies and the advantages of the Eutek Headcell®, Tea Cup, and Grit Snail Grit Removal
System, the Public Works Department recommends procuring a Hydro International's Grit Removal System.
The Public Works Department requests a sole source procurement as there is no functional equivalent for the Hydro
International's Grit Removal System.
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.
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apartment Manager Signature
Council Approval
Date:
Purchasing
Approval:
Purchasing Manager