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The INTERIOR, DEPARTMENT OF THE | US GEOLOGICAL SURVEY has issued a Tender notice for the procurement of a Calcium Thiosulphate Injection System in the USA. This Tender notice was published on 13 Aug 2026 and is scheduled to close on 17 Aug 2026, with an estimated Tender value of Refer Document. Interested bidders can access detailed Tender information, eligibility criteria, and complete bidding documents by referencing TOT Ref No. 147132007, while the tender notice number is 140G0326Q0190 and Registering on the platform.
Procurement Summary
Country: USA
Summary: Calcium Thiosulphate Injection System
Deadline: 17 Aug 2026
Posting Date: 13 Aug 2026
Other Information
Notice Type: Tender
TOT Ref.No.: 147132007
Document Ref. No.: 140G0326Q0190
Competition: ICB
Financier: Self Financed
Purchaser Ownership: Public
Tender Value: Refer Document
Purchaser's Detail
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Login to see detailsTender Details
AMENDMENT TWOThe 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 dechlorinat...
Notice ID: 140g0326q0190
Department/Ind. Agency: interior, department of the
Original Set Aside: total small business set-aside (far 19.5)
Sub-tier: us geological survey
Office: office of acquisiton grants
Product Service Code: 4510 - plumbing fixtures and accessories
NAICS Code: 333914 - Measuring, Dispensing, and Other Pumping Equipment Manufacturing
Inactive Dates: sep 01, 2026
Inactive Policy: 15 days after date offers due
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