Replacement of Particle Counters at the Lanier and Shoal Creek Filter Plants

BL046-26 Page 1 of 28
March 13, 2026
INVITATION TO BID
BL046-26
The Gwinnett County Board of Commissioners is soliciting competitive sealed bids from qualified contractors for the
Replacement of Particle Counters at the Lanier and Shoal Creek Filter Plants for the Department of Water Resources.
Bid Submittal Date and Location:
Bids should be typed or submitted in ink and returned in a sealed container marked on the outside with the BL# and
Company Name. Bids will be received until 2:50 P.M. local time on May 8, 2026 at the Gwinnett County Financial
Services - Purchasing Division - 2nd Floor, 75 Langley Drive, Lawrenceville, Georgia 30046.. Any bid received after this
date and time will not be accepted. Bids will be publicly opened and read at 3:00 P.M.
The bid opening will be virtual ONLY. To access the bid opening virtually, visit the following link:
(https://gwinnettgov.webex.com/gwinnettgov/j.php?MTID=m4f021e13657529b2834e7881f2773cbf),
or dial 408-418-9388 and enter Conference ID 23386881298##. Apparent bid results will be available the following
business day on the website www.GwinnettCounty.com.
A pre-bid conference is scheduled for 10:00 A.M. on April 16, 2026, at the Gwinnett County Lanier Filter Plant
Conference Room, located at 2590 S. Waterworks Road, Buford, GA 30518. All contractors are urged to attend.
Pre-Bid Substitutions:
Submit requests to include products of Manufacturer's not listed as acceptable Manufacturers under Section 40 91
02.01 to Purchasing no later than 3:00PM, April 16, 2026. Provide all the information required for a substitution
including but not limited to technical data sheets and any other documentation to show equivalence. Gwinnett County
Purchasing will issue Addenda as appropriate if any of the proposed substitutions to the Manufacturer's list are
accepted or denied. A Bid submitted with manufacturers not included in the manufacturers list, except as modified by
Addenda, will be considered non-responsive.
Questions regarding bids should be directed to Anna West, Purchasing Associate II, at
Anna.West@GwinnettCounty.com or by calling 770-822-7862, no later than April 30, 2026. Bids are legal and binding
upon the vendor when submitted. All bids should be submitted in duplicate.
Successful contractors will be required to meet insurance requirements. The Insurance Company should be authorized
to do business in Georgia by the Georgia Insurance Department and must have an A.M. Best rating of A-7 or higher
Gwinnett County does not discriminate on the basis of disability in the admission or access to its programs or
activities. Any requests for reasonable accommodations required by individuals to fully participate in any open
meeting, program or activity of Gwinnett County Government should be directed to the ADA Coordinator at the
Gwinnett County Justice and Administration Center, 770-822-8165.
The written bid documents supersede any verbal or written prior communications between the parties.
Award will be made to the contractor submitting the lowest responsive and responsible bid. Gwinnett County reserves
the right to reject any or all bids to waive technicalities and to make an award deemed in its best interest. Bids may
be split or awarded in entirety. Gwinnett County reserves the option to negotiate terms, conditions and pricing with
the lowest responsive, responsible vendor(s) at its discretion.
Award notification will be posted after award on the County website, www.gwinnettcounty.com and companies
submitting a bid will be notified via email.
We look forward to your bid and appreciate your interest in Gwinnett County.
Anna West
Purchasing Associate II

BL046-26 Page 2 of 28
SECTION1: SCOPE OF WORK
1. Procure and install replacement particle counters as specified. Gwinnett County
Department of Water Resources (GCDWR) is requesting replacement units be Particle
Counter PC3400 manufactured by Chemtrac or approved equal.
2. Supply all information requested on this bid.
3. Replacement particle counters should be installed in the locations of the existing particle
counters with minimal structural, communications, or electrical power modifications.
Particle counter configuration should be compatible with the existing water connections.
a. Modify electrical power supply at Shoal Creek Filter Plant (SCFP) instrumentation
racks as needed to suit replacement units.
4. Drawings showing the location of the existing particle counters that are to be replaced at
Lanier Filter Plant (LFP), and photos of the existing particle counters are shown in
Attachment 1 to assist the contractor in assessing installation requirements of
replacement particle counters. Drawings and photos of the existing particle counters at
SCFP are shown in Attachment 2 to assist the contractor in assessing installation
requirements of replacement particle counters.
5. Contractor representative to visit site to field verify and ensure that proposed replacement
equipment will match existing installation, prior to submitting equipment submittals.
Confirm that the existing instrumentation rack location can be reused or modified for the
replacement particle counters to be mounted in existing area.
6. The intention is to
a. Replace twelve (12) particle counters in the LFP filter buildings and provide one (1)
new particle counter as a spare to keep at LFP warehouse.
b. Replace six (6) particle counters in the SCFP filter building.
7. Supply all material and services for the 13 particle counters at LFP and 6 particle counters
at SCFP in accordance with specifications.
8. Replacement of the particle counter units will be done one filter at a time. Contractor
should demonstrate that each installed unit is operating correctly and has been calibrated
before removing the next unit for replacement.
9. GCDWR may assist contractor with Lock-Out Tag-Out (LOTO) of existing particle counters
prior to work commencement.
10. GCDWR may assist contractor with isolating flow to the existing particle counters prior to
removal and introducing flow to the replacement units.
11. The contractor should disconnect existing units from power, communications, existing
influent/effluent flow tubing.
12. The contractor should remove existing units and dispose of the removed units off-site.
13. The contractor should install replacement units as specified.
14. The contractor should provide startup services.
15. GCDWR to perform any modifications to the SCADA system needed.
Facility Locations:
Shoal Creek Filter Plant Lanier Filter Plant
1755 Buford Dam Rd 2590 S. Waterworks Rd
Buford, GA 30518 Buford, GA 30518

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The following particle counters have been identified for replacement:
Facility Asset Description Asset Tags
1 - Lanier Filter Plant Filter 1A effluent AIT-4901
2 - Lanier Filter Plant Filter 1B effluent AIT-4902
3 - Lanier Filter Plant Filter 2A effluent AIT-4903
Filter 2B effluent AIT-4904
4 - Lanier Filter Plant
5 - Lanier Filter Plant Filter 3A effluent AIT-4905
6 - Lanier Filter Plant Filter 3B effluent AIT-4906
7 - Lanier Filter Plant Filter 4A effluent AIT-4907
Filter 4B effluent AIT-4908
8 - Lanier Filter Plant
9 - Lanier Filter Plant Filter 5A effluent AIT-4909
Filter 5B effluent AIT-4910
10 - Lanier Filter Plant
Filter 6A effluent AIT-4911
11 - Lanier Filter Plant
Filter 6B effluent AIT-4912
12 - Lanier Filter Plant
Filter 1 effluent AIT-2090-1
1 - Shoal Creek Filter Plant
Filter 2 effluent AIT-2090-2
2 - Shoal Creek Filter Plant
Filter 3 effluent AIT-2090-3
3 - Shoal Creek Filter Plant
Filter 4 effluent AIT-2090-4
4 - Shoal Creek Filter Plant
Filter 5 effluent AIT-2090-5
5 - Shoal Creek Filter Plant
Filter 6 effluent AIT-2090-6
6 - Shoal Creek Filter Plant

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Bids are requested for the following services and should be provided upon request:
1. Supply of all information requested on this bid.
2. Supply of particle counters, 4-20mA output boards, and all components to match
existing installations.
3. Complete design of any minor modifications to enable installation after removal of the
existing particle counters.
4. Provide a manufacturing and delivery schedule and provide monthly progress
updates.
5. Coordination and delivery of equipment to LFP and SCFP. Assembly of particle
counters and components.
6. Installation and start up services. Note that it is intended to undertake the work at one
plant at a time and the installation at each plant should be completed within the
number of weeks listed below to minimize process interruptions. There will be a one
week period between completion of the work at one plant and commencement of the
installation at the next plant to ensure the completed installation is operating correctly.
The start dates should be agreed upon with Plant staff.
a. Lanier Filter Plant: 2 weeks
b. Shoal Creek Filter Plant: 1 week
7. During each process interruption, GCDWR will isolate the flow to the work area. The
remainder of the facility will be in operation.
8. Provision of Contractor's Certificate of Compliance
9. Provision of Contractor's Certificate of Proper Installation.
10. Provision of Manufacturer's Warranty.
11. Provision of two hard copies and one electronic copy (in searchable PDF format) of
Operating and Maintenance instructions for all components, including shop drawings
of equipment, spare parts list, preventative maintenance schedule, and
troubleshooting information.
12. Supply of specified spare parts and special tools for future maintenance.
Drawings and photographs of the two facilities are provided in the Attachments and the
following specifications are applicable:
SECTION 2: SPECIFICATIONS
Equipment should comply with the following specifications:
Section 01 43 33 - Vendors' Field Services
Section 01 78 23 - Operation and Maintenance Data
Section 01 91 14 - Equipment Testing and Facility Startup
Section 40 91 02.01 - Analytical Measurement Components
The following information sheets should be submitted with the bid submittal.
1. Make, model, and weight of replacement unit.
2. Manufacturer's catalog information, dimension drawings, descriptive literature,
specifications, and materials of construction.
3. Complete description of particle counters and other ancillary items.
4. A complete listing of materials for each particle counter component.
5. Typical mounting details.
6. List of any exceptions to this bid document and its contents.

BL046-26 Page 5 of 28
SECTION 3: ATTACHMENTS
Attachment 1: LFP Existing Drawings and Photos
Attachment 2: SCFP Existing Drawings and Photos
Attachment 3: Existing Equipment Specifications
Attachment 4: Existing Equipment Drawings
Attachment 5: Proposed Equipment Data Sheet

BL046-26 Page 6 of 28
FAILURE TO RETURN THIS PAGE AS PART OF YOUR BID DOCUMENT MAY RESULT IN REJECTION
BID SCHEDULE
BID
ITEM DESCRIPTION QTY UNIT PRICE TOTAL PRICE
NO.
PART 1 - LANIER FILTER PLANT
1.1 Equipment
1.1.1 Chemtrac PC 3400 Particle Counter, or approved equivalent 13 EA $ $
34736 Chemtrac 4-20mA Board
1.1.2 2 channel 4-20mA output board card with 2 alarm relays, or approved 13 EA $ $
equivalent
1.1.3 Tools and spare parts for particle counters and 4-20mA output boards. 1 LS $ $
Post bid contractor site visit for submittal preparation: Contractor
1.2 representative to visit site to field verify and confirm replacement particle 1 DAY $ $
counters will be installed using existing configuration.
1.3 Submittal preparation and submissions. 1 LS $ $
1.4 Installation
Installation and field testing: Vendor representative to provide onsite
installation services and inspect the final installation, and calibrate and
2
1.4.1 supervise a test run/start-up of the equipment, including all travel, $ $
WEEKS
accommodation and ancillary expenses etc. (consecutive days, not
including weekends and holidays).
1.4.2 Cost for separate onsite day visit of 8 hours if requested by Owner. 1 DAY $ $
Provide two hard copies and one electronic copy of the operating and
1.5 1 LS $ $
maintenance manuals.
PART 1 TOTAL $
PART 2 - SHOAL CREEK FILTER PLANT
2.1 Equipment
2.1.1 Chemtrac PC 3400 Particle Counter, or approved equivalent 6 EA $ $
34736 Chemtrac 4-20mA Board
2.1.2 2 channel 4-20mA output board card with 2 alarm relays, or approved 6 EA $ $
equivalent
2.1.3 Tools and spare parts for particle counters and 4-20mA output boards 1 LS $ $
COMPANY NAME

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FAILURE TO RETURN THIS PAGE AS PART OF YOUR BID DOCUMENT MAY RESULT IN REJECTION
BID SCHEDULE
BID
ITEM DESCRIPTION QTY UNIT PRICE TOTAL PRICE
NO.
Post bid contractor site visit for submittal preparation: contractor
2.2 representative to visit site to field verify and confirm replacement particle $ $
counters will be able to be installed using existing configuration.
2.3 Submittal preparation and submissions. 1 LS $ $
2.4 Installation
Installation and field testing: Vendor representative to provide onsite
installation services and inspect the final installation, and calibrate and
1
2.4.1 supervise a test run/start-up of the equipment, including all travel, $ $
WEEK
accommodation and ancillary expenses etc. (consecutive days, not
including weekends and holidays).
2.4.2 Cost for separate onsite day visit of 8 hours if requested by Owner. 1 DAY $ $
Provide two hard copies and one electronic copy of the operating and
2.5 1 LS $ $
maintenance manuals.
PART 2 TOTAL $
TOTAL (PART 1 + PART 2) $
Notes:
1. The unit price MUST include ALL charges, including but not limited to delivery and field and start up services per the specifications.
2. If submitting an approved equivalent, please submit product cut sheets or information documents as requested.
3. Reminder to include the Manufacturer/Product Number and the Delivery A.R.O (time to receive the product after receiving the purchase
order).
The undersigned acknowledges receipt of the following addenda, listed by number and date
appearing on each:
Addendum No. Date Addendum No. Date
______________ ______________ ______________ ______________
______________ ______________ ______________ ______________
Certification Of Non-Collusion In Bid Preparation
Signature Date
COMPANY NAME

BL046-26 Page 8 of 28
FAILURE TO RETURN THIS PAGE AS PART OF YOUR BID DOCUMENT MAY RESULT IN REJECTION
BID SCHEDULE
In compliance with the attached specifications, the undersigned acknowledges all requirements outlined in the "Instructions to Vendors" and all
documents referred to therein, if this bid is accepted by the Board of Commissioners within ninety (90) days of the date of bid opening, to furnish
any or all of the items upon which prices are bid, at the price set opposite each item bid, delivered to the designated point(s) within the time
specified in the fee schedule. By submission of this bid, I understand that Gwinnett County uses Electronic Payments for remittance of goods and
services. Vendors should select their preferred method of electronic payment upon notice of award. For more information on electronic payments,
please refer to the Electronic Payment information in the Instructions to Vendors.
Legal Business Name
Address
Does your company currently have a location within Gwinnett County? Yes No
Representative Signature
Printed Name
Telephone Number E-mail address
Contact Person (if someone other than the authorized representative listed above)
Telephone Number E-mail address

BL046-26 Page 9 of 28
FAILURE TO RETURN THIS PAGE AS PART OF YOUR BID DOCUMENT MAY RESULT IN REJECTION OF BID.
REFERENCES
Gwinnett County requests a minimum of three (3) references where work of a similar size and scope has been
completed.
Note: References should be customized for each project, rather than submitting the same set of references for
every project bid. The references listed should be of similar size and scope of the project being bid on. Do not
submit a project list in lieu of this form.
1. Company Name
Brief Description of Project
Completion Date
Contract Amount $ Start Dates
Contact Person Telephone
E-Mail Address
2. Company Name
Brief Description of Project
Completion Date
Contract Amount $ Start Date
Contact Person Telephone
E-Mail Address
3. Company Name
Brief Description of Project
Completion Date
Contract Amount $ Start Date
Contact Person Telephone
E-Mail Address
Company Name

BL046-26 Page
10 of 28
Bid # & Description BL046-26, Replacement of Particle Counters at the Lanier and Shoal Creek Filter Plants
CODE OF ETHICS AFFIDAVIT
PLEASE RETURN THIS FORM COMPLETED WITH YOUR SUBMITTAL. SUBMITTED FORMS ARE
REQUIRED PRIOR TO EVALUATION.
In accordance with Section 54-33 of the Gwinnett County Code of Ordinances the undersigned
bidder/proposer makes the following full and complete disclosure under oath, to the best of their
knowledge, of the name(s) of all elected officials whom it employs or who have a direct or indirect pecuniary
interest in or with the vendor, its affiliates or its subcontractors:
1. __________________________________________________________________________________________
Company Submitting Bid/Proposal
2. Please select one of the following:
No information to disclose (complete only section 4 below)
Disclosed information below (complete section 3 & section 4 below)
3. If additional space is required, please attach list:
Gwinnett County Elected Official Name Gwinnett County Elected Official Name
Gwinnett County Elected Official Name Gwinnett County Elected Official Name
4. BY:
Authorized Officer or Agent Signature Sworn to and subscribed before me this
day of , 20
Printed Name of Authorized Officer or Agent
Title of Authorized Officer or Agent of Contractor Notary Public
(seal)
Note: See Gwinnett County Code of Ethics Ordinance EO2011, Sec. 54-33. The
ordinance will be available to view in its' entirety at GwinnettCounty.com