This Government Contract opportunity from Department Of The Interior was posted on May 8, 2026. The submission period has ended. Browse the details below for market research, or find similar active opportunities.

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pH Sensor Calibration and Monitoring

Closed

Federal

Submission Closed05/23/2026, 12:00:00 AM UTC

Contract Overview

Solicitation details, issuing organization, response deadlines, documents, and interested companies for this government contract opportunity.

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NAICS: 541380

New

SLED

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DEADLINE

Construction Materials Testing and InspectionThis contract involves subcontracting third-party testing and inspection services for construction materials, specifically concrete and structural steel, to ensure compliance with the standards set by the Tennessee Department of Transportation (TDOT) and CSX. The primary focus is on verifying the quality and safety of these materials used in construction projects located in Sullivan, Tennessee. The contract falls under the NAICS code 541380, which covers testing laboratories, and it was posted and set with a response deadline on June 26, 2026. The Tennessee Department of Transportation is overseeing the contract, although specific details about the office address and point of contact are not provided. Interested parties are directed to submit proposals by the deadline through the TDOT bidding portal. This subcontract aims to support the integrity and regulatory compliance of infrastructure projects in the region.

Tennessee Department of Transportation

POSTED

DEADLINE

Third-Party Testing and Quality AssuranceThis contract involves performing independent testing and quality assurance services for materials and construction processes related to a project overseen by the Tennessee Department of Transportation (TDOT). The contractor is responsible for conducting thorough tests and delivering detailed reports within specified timelines to CSX for evaluation and approval. This ensures compliance with required standards and supports the overall integrity and safety of the construction work. The solicitation, titled "Third-Party Testing and Quality Assurance," is a subcontract opportunity identified by the NAICS code 541380, which pertains to testing laboratories. The work is to be performed in Davidson, Tennessee. Proposals were due on June 26, 2026, aligning with the posted date, indicating a tight response window. The contract emphasizes the importance of independent verification to maintain quality control throughout the construction process.

POSTED

DEADLINE

Intelligent Compaction (IC) Monitoring and ReportingThe contract involves providing real-time monitoring and reporting of compaction data during Hot Mix Asphalt (HMA) paving operations using Intelligent Compaction (IC) certified equipment. The key requirement is the integration of this data with the Tennessee Department of Transportation’s (TDOT) Electronic Technical Automation System (ETAS) to ensure seamless data exchange and enhanced project oversight. The subcontract focuses on the use of advanced technology to improve paving quality and operational efficiency. This opportunity is issued by the Tennessee Department of Transportation, with the place of performance specified as Grundy. The contract is categorized under NAICS code 541380, which relates to testing laboratories, indicating a technical and specialized service scope. The solicitation and response deadlines both fall on June 26, 2026, emphasizing prompt submission from interested subcontractors. Overall, this contract is targeted at firms equipped with IC technology and capable of integrating their systems with TDOT’s platforms to support infrastructure projects.

Tennessee Department of Transportation

POSTED

in 10 days

DEADLINE

in 10 days

AI Contract Overview

This contract involves the monthly calibration and verification of pH sensors to maintain accurate chemical balance within a wash water recycling process. It is a subcontract opportunity designated as a total small business set-aside under FAR 19.5, aligned with NAICS code 541380, which pertains to testing laboratories. The contract is issued by the Department of the Interior through the Lower Colorado Regional Office. The solicitation was posted on May 8, 2026, with a response deadline of May 23, 2026. While specific location details for the place of performance and office address are not provided, the primary focus remains on ensuring sensor accuracy essential for effective water treatment operations. Interested small businesses are encouraged to respond promptly within the stated timeframe to participate in this opportunity.

General Info

Monthly pH sensor calibration subcontract for water recycling, small business set-aside, response by May 23, 2026.

Agency

Department Of The Interior → Lower Colorado Regional Office

NAICS

541380 - Testing Laboratories and ServicesView NAICS

Place of Performance

Set-Aside

SBA

Documents

(0)

No documents available

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Timeline

PhaseClosed

PostedMay 8

subcontract

Response DeadlineMay 23

Deadline has passed

Submission Closed

05/23/2026, 12:00:00 AM UTC

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Organization & Contact Information

AgencyDepartment Of The Interior → Lower Colorado Regional Office

ContactsNo contacts available

OfficeN/A

Organization / Agency

Department Of The Interior → Lower Colorado Regional Office

Office AddressN/A

ContactsNo contact information available

Full Description

Monthly calibration and verification of pH sensors to ensure accurate chemical balance in the wash water recycling process.