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File #: RES 2022-096    Version: 1 Name:
Type: Resolution Status: Consent Calendar
File created: 8/10/2022 In control: Town Council
On agenda: 9/6/2022 Final action:
Title: Resolution Waiving Formal Written Bidding Requirement on the Basis of Sole Source for Services Provided by Pall Corporation [Entire Castle Rock Water Service Area]
Attachments: 1. Attachment A: Resolution, 2. Exhibit 1: Sole Source Justification, 3. Attachment B: Agreement

To:                     Honorable Mayor and Members of Town Council


Through: David L. Corliss, Town Manager


From:                     Mark Marlowe, P.E., Director of Castle Rock Water

                     Shawn Griffith, Operations Manager



Resolution Waiving Formal Written Bidding Requirement on the Basis of Sole Source for Services Provided by Pall Corporation [Entire Castle Rock Water Service Area] 




Executive Summary


Castle Rock Water (CRW) seeks Town Council approval of a Resolution (Attachment A) approving a sole source justification (Exhibit 1) with Pall Corporation, for the Plum Creek Water Purification Facility (PCWPF) Pall Interface Upgrade Project for the amount of $106,866.


Notification and Outreach Efforts


This project is security sensitive and no public outreach is planned. Work will be performed at remote CRW sites and will be done out of the public eye


History of Past Town Council, Boards & Commissions, or Other Discussions


The engineering contract for PCWPF, which included the Pall Membrane system, with Burns and McDonnell was approved by Council on January 20, 2011 and constructed by Moltz Construction. The plant began operations in 2013 with four Pall Membrane filtration system racks. The expansion of the original Pall membrane system at PCWPF was approved by council on September 20, 2016, which increased capacity by 2 million gallons (MG).




On a typical summer day, PCWPF receives 6 MG of surface water from Plum Creek. In the fifth step of water treatment at PCWPF, the water is pushed through Pall Aria Microfiltration membranes. Each membrane is less than 0.1 microns and helps remove particles such as bacteria, viruses and other microorganisms such as: E. coli, giardia, cryptosporidium and other microorganisms that may be present in surface water.


The Pall Aria Membrane System’s Numatic Pneumatic Solenoid Bank Interface (PSBI), currently in service on the Pall Membrane racks have been declared obsolete by Emerson, and repair parts are not available. Staff has been utilizing existing spares for replacements, but stock is low. The current PSBIs are unable to communicate with new Numatics G3 PSBIs. The entire system must be upgraded in order to work properly. Any failure of the PSBI equipment is considered detrimental, causing the Pall system to become inoperable, compromising filter production. Considering the lead time for the Numatics G3 PBSI equipment, of 10-14 weeks, it is critical to get the equipment ordered immediately.


Budget Impact


Funding for this purchase will come from the Water Resources Plant Operations Repair & Maintenance Equipment fund, after a budget transfer from the Water Resources CIP Operations & Maintenance account, as follows:


Fund Name

Account Number


Budget Transfer Amount

Current Account Balance

Account Balance after Transfer

CIP Operations & Maintenance






Plant Operations Repair & Maintenance






Total Cost







Staff Recommendation


Staff recommends Town Council approval of a Resolution approving a sole source justification with Pall Corporation for the PCWPF Pall Interface Upgrade Project in the amount of $106,471.


Proposed Motion


“I move to approve the Resolution as introduced by title.”


Alternative Motions


“I move to approve the resolution as introduced by title, with the following conditions: (list conditions).


“I move to continue this item to the Town Council meeting on _____ date to allow additional time to (list information needed).”




Attachment A:                      Resolution 

Exhibit 1:                      Sole Source Justification

Attachment B:                      Agreement