This Sources Sought opportunity from Department Of The Interior was posted on April 1, 2026. The submission period has ended. Browse the details below for market research, or find similar active opportunities.

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B--ISOTOPE ANALYSES

Awarded

140G0326Q0077Federal

Submission Closed04/06/2026, 12:00:00 PM UTC

Contract Overview

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

Active Opportunities Like This One

NAICS: 541380

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Construction Aggregate TestingThis subcontract for Construction Aggregate Testing, managed by the California Department of General Services, involves providing specialized testing services for aggregates used in roads, curbs, walkways, and paving on CALFIRE facility projects. The selected contractor will be responsible for performing sampling and laboratory testing, utilizing laboratory scales and sieve analysis equipment to ensure all materials align with project design documents. The primary deliverable for this engagement is the provision of detailed aggregate quality and gradation reports. The project is located in San Diego and falls under NAICS code 541380. Interested parties must submit their responses by the deadline of November 24, 2026. This opportunity is designed to support prime contractors in maintaining quality control and regulatory compliance for critical infrastructure improvements within the CALFIRE network.

California Department of General Services

POSTED

DEADLINE

Nondestructive Testing (NDT) ServicesThis subcontract for Nondestructive Testing (NDT) Services involves performing specialized inspections on structural elements for prime contractors working on CALFIRE facility projects. The primary objective is to detect internal flaws using ultrasonic, radiographic, or magnetic particle testing equipment. The selected provider is responsible for delivering detailed NDT certification reports and comprehensive flaw analysis to ensure structural integrity. The project is managed through the California Department of General Services and will be performed in San Diego. To qualify, personnel must hold an NDT Level II certification or higher in accordance with ASNT CP-189 standards. Interested parties should note the response deadline of November 24, 2026, and the associated NAICS code 541380.

California Department of General Services

POSTED

DEADLINE

Structural Steel, Bolting, and Welding InspectionThis subcontract opportunity, managed by the California Department of General Services, involves providing specialized visual and technical inspections for structural steel, welding, and high-strength bolting on CALFIRE facility projects located in San Diego. The selected contractor will be responsible for utilizing welding gauges and torque wrenches to ensure structural integrity, ultimately delivering detailed welding inspection reports and bolting torque logs to the prime contractor. To qualify for this engagement, personnel must hold both AWS Certified Welding Inspector and ICC Structural Steel and Welding Inspector certifications. Interested parties should note that the solicitation was posted on October 28, 2026, with a response deadline set for November 24, 2026.

California Department of General Services

POSTED

DEADLINE

Concrete and Reinforcing Steel Special InspectionThis subcontract for Concrete and Reinforcing Steel Special Inspection involves providing specialized inspection and testing services for prime contractors on CALFIRE facility projects in San Diego. The scope of work includes inspecting reinforcing steel placement and performing concrete sampling and testing for structures such as barracks, apparatus bays, and generator buildings. Required deliverables include concrete strength reports and reinforcing steel inspection checklists, utilizing tools such as concrete cylinders, slump cones, and compression testing machines. Qualified providers must hold ICC Reinforced Concrete Special Inspector and ACI certifications to ensure compliance with project standards. This opportunity is managed through the California Department of General Services under NAICS code 541380. The response deadline for this solicitation is November 24, 2026.

California Department of General Services

POSTED

DEADLINE

Soils Inspection and Density TestingThis subcontract, managed by the California Department of General Services, involves providing specialized soils inspection and density testing for a CALFIRE facility project, specifically a fire station replacement in Potrero, California. The selected contractor will perform both field and laboratory testing of soils to support prime contractors during critical phases of construction, including clearing, grading, and foundation preparation. All work must be conducted in accordance with ASTM D 3740 standards, utilizing nuclear gauges and laboratory soil testing apparatus to ensure structural integrity. The contractor is responsible for delivering detailed soil density test reports and comprehensive inspection logs. This opportunity falls under NAICS code 541380 and was posted on October 28, 2026, with a response deadline of November 24, 2026. While the project is located in Potrero, the place of performance is listed within San Diego.

California Department of General Services

POSTED

DEADLINE

Environmental Analytical Testing ServicesThis subcontract for Environmental Analytical Testing Services supports prime contractors working on research and enforcement projects for the California Department of Fish & Wildlife. The scope of work involves performing specialized analytical testing on water and waste samples, specifically focusing on nutrient analysis, turbidity, BOD, COD, and low-level cleanups for pesticides, PAHs, and SVOCs. All work must be performed in accordance with EPA and SW-846 standards, and the provider is required to maintain ELAP certification to deliver Level II and Level IV analytical reports. The project is categorized under NAICS code 541380 and is designated for performance in Amador. Interested parties should note that the response deadline is November 17, 2026. This opportunity is managed through the Cal eProcure system for the state of California.

California Department of Fish & Wildlife

POSTED

DEADLINE

NDT Inspection for Cam AssemblyThis subcontract involves providing Non-Destructive Testing services for prime contractors supporting DLA Weapons Support ASC aerospace projects. The scope of work focuses on conducting structural integrity inspections of forged and machined cam assemblies utilizing ultrasonic, radiographic, or penetrant methods. All work must be performed in accordance with RQ040 NDT Accreditation Requirements, and the contractor is responsible for delivering certified inspection reports. The project is managed by the Department of Defense under the DLA Weapons Support ASC Supplier Oper AE and AF Div, with performance taking place at Tinker AFB. Interested parties should note the response deadline of November 5, 2026, and the classification of the work under NAICS code 541380.

DLA WEAPONS SUPPORT ASC SUPPLIER OPER AE AND AF DIV

POSTED

DEADLINE

First Article Testing and Material Certification ServicesThis subcontract opportunity is for the Department of Defense, specifically the DLA Weapons Support ASC Commodities Division, to provide independent testing and validation services for prime contractors. The selected provider will perform First Article Testing on three initial units to verify compliance with Drawing 77445 specifications using specialized metrology and materials testing equipment. The scope of work includes coordinating with a Quality Assurance Representative for point-of-origin inspections and delivering a certified First Article Test Report. The project is a total small business set-aside under NAICS code 541380 and will be performed at Tinker AFB. To be eligible, the contractor must hold ISO/IEC 17025 accreditation. Interested parties must respond by November 5, 2026.

DLA WEAPONS SUPPORT ASC COMMODITIES DIVISION

POSTED

DEADLINE

Third-Party Inspection and CertificationThis subcontract for Third-Party Inspection and Certification supports the Department of Defense at the Jacksonville Building. The selected provider will perform final inspections and quality validation for prime contractors delivering aviation lighting for the DLA. Responsibilities include conducting functional testing and dimensional inspections using CMM and electrical test equipment to ensure compliance with TDP Rev A Gen 1, culminating in the delivery of certificates of conformance and detailed inspection reports. Critical requirements for this engagement include maintaining CMMC Level 2 certification and coordinating directly with the DCMA for source inspections. The project falls under NAICS code 541380 and is based in Jacksonville, Florida. Interested parties must respond by November 9, 2026.

POSTED

DEADLINE

Specialized Testing Laboratory (First Article Test)This subcontract opportunity is for a Specialized Testing Laboratory to perform First Article Testing for prime contractors supporting DLA Weapons Support Land Supplier Operations. The selected provider will be responsible for testing two units using specialized shock and impact testing rigs to verify that performance metrics align with the provided technical data package. The final deliverable for this engagement is a certified FAT Test Report. The project is managed under NAICS code 541380 and will be performed in New Cumberland. Due to the nature of the work, the contractor must have access to ITAR and EAR export-controlled data, and ISO/IEC 17025 certification is preferred. Interested parties must respond by November 9, 2026.

DLA WEAPONS SUPPORT LAND SUPPLIER OPNS VEHICLE SPT

POSTED

DEADLINE

First Article Test (FAT) Laboratory ServicesThis subcontract for First Article Test Laboratory Services supports the DLA Weapons Support Nuclear Reactor Program. The selected provider will perform First Article Testing on a single unit of electrical insulation to ensure full compliance with MIL-I-24768/1(1) standards. This process involves utilizing specialized thermal resistance and dielectric testing equipment to validate the component, culminating in the delivery of one validated test unit and a certified First Article Test report. Eligible contractors must hold ISO 9001:2015 or ISO/IEC 17025 certification to qualify for the work. The performance of these services is located at Hill AFB. Interested parties should note the response deadline of November 9, 2026, for this Department of Defense requirement categorized under NAICS code 541380.

DLA WEAPONS SUPPORT NUCLEAR REACTOR PROGRAM

POSTED

DEADLINE

Material Testing and Certification LaboratoryThis subcontract for the DLA Weapons Support Land Supply Chain involves providing Material Testing and Certification Laboratory services to perform Production Lot Testing for prime contractors. The primary objective is to validate the quality conformance of O-rings by reviewing material certifications, process operation sheets, and inspection method sheets. Specific technical requirements include verifying asbestos-free composition and ensuring surface imperfections adhere to ISO 3601-3 standards, culminating in the delivery of a comprehensive Test Report. The project is based in Keyport, Washington, and falls under NAICS code 541380. Due to the nature of the technical data handled during the certification process, the contractor must maintain CMMC Level 2 compliance. Interested parties should note the response deadline of November 9, 2026.

DLA WEAPONS SUPPORT LAND SUPPLY CHAIN

POSTED

about 10 hours ago

DEADLINE

in 12 days

AI Contract Overview

The U.S. Geological Survey, under the Department of the Interior, issued Sources Sought Notice 140G0326Q0077 to conduct market research for stable isotope analysis services. The project supports the Pacific Abrupt Climate Events Project, which aims to reconstruct past ocean conditions along the California coast by analyzing approximately 400 calcite samples from benthic and planktic foraminifera. The scope of work requires the measurement of δ13C and δ18O values to interpret glacial-interglacial variability, ocean temperature, salinity, global ice volume, and upwelling dynamics. The selected contractor will perform the analysis at their own laboratory using government-furnished samples. Key deliverables include a comprehensive electronic report containing the isotopic values for all samples, results from international calcite standards used for calibration, and detailed analytical precision and error data. Interested businesses under NAICS code 541380 must submit a capability statement by April 6, 2026, detailing their laboratory instrumentation, relevant experience, quality control practices, and company information, including their Unique Entity Identifier and SAM registration status.