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This Government Contract opportunity from California was posted on September 12, 2025. The submission period has ended. Browse the details below for market research, or find similar active opportunities.

Biofiltration Soil Mixture (BSM) Supply

Closed
State & Local

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The City of Carlsbad is seeking a subcontractor for the supply of an engineered biofiltration soil mixture. The selected provider must ensure the material adheres to rigorous technical specifications, specifically regarding pH levels, salinity, sodium adsorption ratio, chloride content, organic matter, and the carbon-to-nitrogen ratio. This opportunity was posted on September 12, 2025, with a response deadline of October 22, 2025. The contract falls under NAICS code 325320 and is managed by the Contract Administration Department of the City of Carlsbad in California.

Documents

This scope was carved out of PWS26-3917TRAN.

The full solicitation package (2 documents), including the RFP, is on the prime solicitation, not on this scope.

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El Camino Real Widening from Poinsettia Lane to Camino Vida Roble

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Timeline

PhaseClosed
Posted

subcontract

Response Deadline

Deadline has passed

Submission Closed

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Organization & Contact Information

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AgencyCalifornia → Contract Administration Department of City of Carlsbad
ContactsNo contacts available
OfficeN/A
Office AddressN/A
ContactsNo contact information available

Full Description

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Supply engineered biofiltration soil mixture meeting strict technical specifications including pH, salinity, SAR, chloride, organic matter, and C:N ratio.

More opportunities from California → Contract Administration Department of City of Carlsbad

Same awarding agency

NAICS: 237110
SLED
Vista/Carlsbad Reach VC-2 Manhole Rehabilitation Project
Solicitation # PWS27-4213UTIL
The City of Carlsbad is soliciting bids for the Vista/Carlsbad Reach VC-2 Manhole Rehabilitation Project, identified as Contract No. 5551 and Solicitation PWS27-4213UTIL. The project requires a qualified contractor to provide all labor, materials, equipment, and services necessary for sewer manhole rehabilitation, including internal inspections, cleaning, wall and bench repairs, structural lining, and the replacement of manhole frames and covers. The award will be based on the lowest responsive and responsible bid, determined by the sum of Schedule A, which includes line items for mobilization, preconstruction surveys, storm water pollution control, temporary traffic control, and specific manhole rehabilitation tasks. To be considered responsive, bidders must be licensed contractors and submit a 10 percent bid bond, a noncollusion declaration, and a statement regarding debarment. Technical qualifications are stringent, requiring at least five years of experience completing five or more sewer manhole rehabilitation projects valued at 400,000 dollars or more. The designated project representative must have three years of superintendent experience and a completed OSHA 30-hour Construction Training Course. The contract mandates strict quality control adhering to ASTM and ACI standards, including XRF testing for geopolymer liners and pH testing for surface preparation. Additionally, the contractor must comply with California prevailing wage laws and provide comprehensive insurance coverage for general liability, automotive, and workers compensation. Bids are due by November 2, 2026, via the City's electronic bidding system.
Water and Sewer Line and Related Structures Construction

POSTED

7 days ago

DEADLINE

in 6 days
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