Calcium thiosulphate injection system
Closed Solicitation Posted
- Solicitation number
- 140G0326Q0190
- Agency
-
Office of Acquisitions and Grants
US Geological Survey, Department of the Interior
- Responses due
- Set-aside
- Total Small Business
Opportunity facts
- NAICS code
- 333914 Measuring, Dispensing, and Other Pumping Equipment Manufacturing
- PSC
- 4510 Plumbing Fixtures And Accessories
- Points of contact
Notice details come from SAM.gov. Updated .
About this opportunity
The US Geological Survey, Western Fisheries Research Center seeks a Calcium Thiosulfate Injection System including installation, with quotes due August 17, 2026 at 10:00 a.m. EDT. This is a total small business set-aside, subject to availability of funds.
Place of performance is Seattle, Washington (6505 NE 65th Street). Delivery and installation must be completed between September 1 and December 1, 2026, during normal business hours. The system will replace an existing sulfur dioxide gas dechlorination system and inject liquid calcium thiosulfate (30% w/v, NSF-certified) into a carrier line discharging into a process water culvert/mixing basin. The requirement includes a duplex peristaltic metering pump skid with polyethylene construction, PVC Schedule 80 piping, dual pumps with flow range 0.001 to 1.35 GPH and turndown ratio of at least 1,000:1, 4-20 mA analog signal input and output for Siemens Desigo building management system integration, NSF/ANSI 61 certification, minimum one-year pump warranty and two-year skid warranty, complete installation labor, system commissioning, operator training, and manufacturer documentation. Process water flows at 125–250 GPM (typical 150 GPM); estimated CaTS dosing is 0.10–0.23 GPH. The system requires 115V/60Hz single-phase power with standard NEMA 5-15 receptacle. The reference basis is the Blue-White FLEXFLO M1 peristaltic pump paired with the CHEM-FEED CFCS-2 Compact Duplex Skid System, though equivalent products meeting stated salient characteristics are acceptable. NAICS code 333914 applies with size standard 750; PSC is 4510. Preference is given to articles manufactured in the United States per the Buy American clause. Quotes must be submitted via email to elizabeth_adam@ios.doi.gov and will be evaluated by comparative analysis. Questions are due August 11, 2026 at 10:00 a.m. ET.
Notice text
3 versions
Update #3 · Latest ·
AMENDMENT TWO
The purpose of this Amendment is to answer vendor questions and extend the due dates for quotes:
The due date for quotes is extended to August 17, 2026, at 10:00am EDT.
The Government offers the following supplemental process information in response to a vendor inquiry. No drawings, specifications, or P&IDs beyond the Statement of Need (SON) are available for release. This is a pump skid procurement to replace an existing sulfur dioxide gas dechlorination system. The new skid shall inject liquid calcium thiosulfate (CaTS) into the existing carrier line that discharges the dechlorination stream into the process water culvert/mixing basin; existing SO2 injection hardware is not compatible and shall not be reused. The SON remains the governing document for all requirements.
Q: Do you have drawings, specifications, or a P&ID available?
A: No. No additional drawings or P&IDs will be provided. A site walk is not being offered; the SON is sufficient to scope and quote the requirement. The supplemental process data below is provided to assist with pump sizing and quoting.
Application: Dechlorination of laboratory lake process water prior to discharge.
Chemical: Liquid calcium thiosulfate, 30% w/v (24% w/w), NSF-certified (reference basis: Tessenderlo Kerley CaTS/Captor, specific gravity approximately 1.22¿1.32, approximately 10.4 lb/gal).
Process configuration: Process water (125¿250 GPM, typical approximately 150 GPM) flows from the settling tank into a culvert/mixing basin. Dechlorination is performed on a separate branch (carrier) line that delivers a small slipstream of process water, carrying the metered CaTS, into the same culvert/mixing basin, where blending with the full process stream occurs. CaTS is metered into this carrier line, not into the full-flow process stream.
Chlorine load: Process water is chlorinated with 0.8% sodium hypochlorite to approximately 2.5 ppm free chlorine residual following a 1-hour dwell in the settling tank prior to dechlorination. Representative current reading is approximately 150 GPM at approximately 2.25 ppm free chlorine residual. Offerors should allow for excursions up to approximately 3 ppm at peak flow.
Existing dechlorination duty being replaced: approximately 9 lb/day sulfur dioxide gas.
Estimated CaTS dosing duty (per the manufacturer dechlorination dosage chart, approximately 5.1 gal per million gallons per ppm chlorine at neutral pH, based on the full process flow and chlorine load):
- Typical (150 GPM, 2.25 ppm): approximately 0.10 GPH (approximately 2.5 gal/day)
- Low flow (125 GPM, 2.5 ppm): approximately 0.10 GPH
- Peak (250 GPM, 2.5 ppm): approximately 0.19 GPH
- Peak with excursion (250 GPM, 3.0 ppm): approximately 0.23 GPH (approximately 5.5 gal/day)
The resulting operating band is approximately 0.10¿0.23 GPH, consistent with the high-turndown, low-flow peristaltic metering pump specified in the SON. Estimated values are provided for reference only and do not modify the salient characteristics in Section 4.0.
Chemical storage: Liquid CaTS is supplied and stored in a 275-gallon tote at the storage location; totes are delivered and removed by the chemical supplier as needed. Pump suction shall be configured for tote draw-down.
Utilities and interfaces:
- Power: 115V / 60Hz, single phase, standard NEMA 5-15 receptacle.
- Controls: Facility BMS is Siemens Desigo. Required signals are 4¿20 mA input (dosing speed control) and 4¿20 mA output (flow/status feedback), plus remote start/stop, alarm output, and run/status output.
- Suction: CaTS suction shall be run from the existing 275-gallon tote at the storage location.
- Discharge/injection: The new system shall tie into and inject CaTS into the existing 1/2" Schedule 80 PVC carrier line, which delivers the dechlorination stream into the culvert/mixing basin. The carrier line is a low-flow branch, not the full 125¿250 GPM process stream. Existing SO2 injection hardware is not compatible and shall not be reused; the offeror shall provide a new injection assembly (diffuser/injection quill, fittings, and all materials) suitable for liquid CaTS injection into the 1/2" Schedule 80 PVC carrier line.
All other requirements remain as stated in the Statement of Need.
No further questions will be accepted.
*********************************
Update #2 ·
Amendment One: The purpose of this Amendment is to clarify that quotes are due on Thursday, August 13, 2026, at 10:00am ET.
*******************************************************
REQUEST FOR QUOTE
CALCIUM THIOSULPHATE METERING PUMP SYSTEM AND INSTALLATION - SEATTLE, WA
INTRODUCTION
This is a solicitation for commercial items prepared in accordance with the format in Federal Acquisition Regulation (FAR) Part 12 as supplemented with additional information included in this notice.
SMALL BUSINESS SET-ASIDE
SUBJECT TO THE AVAILABILITY OF FUNDS
DESCRIPTION
The US Geological Survey (USGS), Western Fisheries Research Center (WFRC), requires a Calcium Thiosulphate Injection System including installation as described in the attached Salient Characteristics.
RELEVANT INFORMATION
The North American Industry Classification System (NAICS) code 333914 Measuring, Dispensing, and Other Pumping Equipment Manufacturing and associated size standard 750 applies to this announcement, along with Product Service Code (PSC) 4510 Plumbing Fixtures and Accessories.
QUESTIONS
All questions must be sent directly to elizabeth_adam@ios.doi.gov by Tuesday, August 11, 2026, at 10:00am ET.
SUBMISSION OF QUOTES
Quotes shall only be accepted through electronic mail addressed to the Contracting Officer at elizabeth_adam@ios.doi.gov. All quote documents required by this solicitation must be uploaded and received in their entirety no later than Thursday, August 13, 2026, at 10:00am ET. Quotes submitted by hardcopy or any web portal shall not be accepted or considered
Quotes must be submitted FOB Destination shipping to Seattle, WA,
EVALUATION OF QUOTES
Quotes will be evaluated by Comparative Evaluations.
Offerors are to include a technical description of the items being offered in sufficient detail to evaluate compliance with the requirements in the solicitation as seen in the Evaluation Factors (see Attachment). This may include product literature, references, or other documents, if necessary.
***PREFERENCE GIVEN TO ARTICLES MANUFACTURED IN THE UNITED STATES*** See FAR clause 52.225-1 Buy American.
Include the country of manufacture with your quote.
ESTIMATED PERIOD OF PERFORMANCE
August 15 to November 15, 2026
Offerors shall return the following:
Signed SF-18
Firm, fixed price quote
Technical information including specifications of offerings
System for Award Management (SAM) Unique Identification Entity (UEI)
Attached Pages:
Statement of Work
Clauses and Provisions
Update #1 ·
REQUEST FOR QUOTE
CALCIUM THIOSULPHATE METERING PUMP SYSTEM AND INSTALLATION - SEATTLE, WA
INTRODUCTION
This is a solicitation for commercial items prepared in accordance with the format in Federal Acquisition Regulation (FAR) Part 12 as supplemented with additional information included in this notice.
SMALL BUSINESS SET-ASIDE
SUBJECT TO THE AVAILABILITY OF FUNDS
DESCRIPTION
The US Geological Survey (USGS), Western Fisheries Research Center (WFRC), requires a Calcium Thiosulphate Injection System including installation as described in the attached Salient Characteristics.
RELEVANT INFORMATION
The North American Industry Classification System (NAICS) code 333914 Measuring, Dispensing, and Other Pumping Equipment Manufacturing and associated size standard 750 applies to this announcement, along with Product Service Code (PSC) 4510 Plumbing Fixtures and Accessories.
QUESTIONS
All questions must be sent directly to elizabeth_adam@ios.doi.gov by Tuesday, August 11, 2026, at 10:00am ET.
SUBMISSION OF QUOTES
Quotes shall only be accepted through electronic mail addressed to the Contracting Officer at elizabeth_adam@ios.doi.gov. All quote documents required by this solicitation must be uploaded and received in their entirety no later than Thursday, August 16, 2026, at 10:00am ET. Quotes submitted by hardcopy or any web portal shall not be accepted or considered
Quotes must be submitted FOB Destination shipping to Seattle, WA,
EVALUATION OF QUOTES
Quotes will be evaluated by Comparative Evaluations.
Offerors are to include a technical description of the items being offered in sufficient detail to evaluate compliance with the requirements in the solicitation as seen in the Evaluation Factors (see Attachment). This may include product literature, references, or other documents, if necessary.
***PREFERENCE GIVEN TO ARTICLES MANUFACTURED IN THE UNITED STATES*** See FAR clause 52.225-1 Buy American.
Include the country of manufacture with your quote.
ESTIMATED PERIOD OF PERFORMANCE
August 15 to November 15, 2026
Offerors shall return the following:
Signed SF-18
Firm, fixed price quote
Technical information including specifications of offerings
System for Award Management (SAM) Unique Identification Entity (UEI)
Attached Pages:
Statement of Work
Clauses and Provisions
Files
| File | Type | Posted |
|---|---|---|
| Sol_140G0326Q0190_Amd_0002.pdf | ||
| Sol_140G0326Q0190_Amd_0001.pdf | ||
| Sol_140G0326Q0190.pdf |
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