Unofficial Notice of Invitation to Bid (NIB)

General Bid Items

• Quantity: -  Unit: Service  Work Item: Materials Testing and Quality Control (Field and laboratory testing of soils, aggregate base, asphalt concrete, Portland cement concrete; concrete mix design review, sampling, cylinder testing, in-place testing, core sampling; asphalt concrete quality control, field density testing; nuclear density gauge testing, laboratory compaction testing (Proctor), R-value testing, California Bearing Ratio (CBR), other soil mechanics testing; materials engineering support; testing and verification of specialized materials).
• Quantity: -  Unit: Service  Work Item: Geotechnical Services and Earthwork Inspection (Geotechnical observation and testing during grading, excavation, trenching, earthwork; compaction testing and verification for trench backfill, pipe bedding, structural fill, embankments; proof-rolling, plate load testing, bearing capacity verification; observation and documentation of subsurface conditions; slope stability monitoring and evaluation; deep foundation inspection for drilled piers, driven piles, micropiles; verification of geotechnical construction requirements; evaluation of unsuitable materials).
• Quantity: -  Unit: Service  Work Item: Structural and Special Inspections (Concrete and reinforced concrete construction; post-installed anchors and bolts in concrete; special moment-resisting concrete frames; reinforcing steel and prestressing tendons; structural welding and high-strength bolting; structural masonry construction; reinforced gypsum concrete and insulating concrete fill; spray-applied fire-resistive materials; deep foundation elements; shotcrete application; special grading, excavation, controlled fill operations; smoke control systems; water storage tanks, reservoirs, clarifiers, digesters; foundation systems (formwork, reinforcing steel, concrete placement); structural steel fabrication and erection; concrete masonry unit (CMU) construction; seismic bracing, anchorage, lateral force-resisting systems; continuous inspection for critical structural operations).
• Quantity: -  Unit: Service  Work Item: Pipeline and Utility Infrastructure Inspection (Full-time construction inspection of water main, sewer main, force main, and transmission pipelines; verification of pipe materials, joints, gaskets, fittings, appurtenances; trench excavation inspection (width, depth, bedding, dewatering); pipe installation inspection (grade, alignment, joint assembly, thrust restraint); hydrostatic pressure testing, air testing, vacuum testing, leakage testing per AWWA standards; mandrel and deflection testing for flexible pipes; video inspection (CCTV) observation; inspection of pipeline appurtenances).
• Quantity: -  Unit: Service  Work Item: Protective Coatings and Corrosion Control (Inspection of protective coating systems for steel water storage tanks, reservoirs, standpipes, pressure vessels; surface preparation inspection (abrasive blasting, power tool cleaning, substrate preparation); coating application inspection (environmental conditions monitoring, material verification, application technique, mixture ratios, viscosity, film thickness measurement); holiday detection and coating integrity testing; inspection of coating repairs, touch-up, maintenance coating applications; cathodic protection system inspection (anode installation, rectifier testing, system commissioning); coating inspection for buried piping, casings, submerged structures; inspection of interior linings for tanks, pipes, process equipment).
• Quantity: -  Unit: Service  Work Item: Electrical and Instrumentation Testing (Electrical system inspection for pump stations, lift stations, treatment facilities, control buildings; verification of electrical equipment installation (motor control centers, variable frequency drives, switchgear, panelboards); grounding and bonding system inspection and testing; conduit and raceway installation inspection; cable and wire installation (conductor sizing, terminations, identification); motor and pump electrical testing (megger testing, insulation resistance, rotation verification); generator and automatic transfer switch testing and commissioning support; instrumentation and control system inspection; SCADA system installation verification and communication testing; lighting and emergency power system inspection; arc flash labeling verification and electrical safety compliance review; functional testing observation and documentation).
• Quantity: -  Unit: Service  Work Item: Welding Inspection and Non-Destructive Testing (NDT) (Welding inspection for steel pipe, structural steel, miscellaneous metals per applicable codes (AWWA, AWS, ASME); pre-weld inspection (welder qualification, welding procedure review, base metal verification); in-process welding inspection (joint preparation, fit-up, interpass, weld quality); visual weld inspection (VT); non-destructive testing (radiographic testing (RT), ultrasonic testing (UT), magnetic particle testing (MT), liquid penetrant testing (PT)); weld repair inspection; post-weld heat treatment monitoring).
• Quantity: -  Unit: Service  Work Item: Environmental Compliance and Monitoring (Stormwater pollution prevention plan (SWPPP) compliance inspection and monitoring; erosion and sediment control inspection and effectiveness evaluation; Best Management Practice (BMP) installation and maintenance verification; dust control monitoring and fugitive dust emission compliance; hazardous materials inspection (lead, asbestos) during demolition/rehabilitation; water quality sampling and monitoring during construction dewatering; air quality monitoring for confined space entry/worker safety; spill prevention and containment inspection; waste management and disposal documentation verification).

NAICS Classification

NAICS 541380 – Testing Laboratories (Materials testing and quality control, geotechnical testing, electrical and instrumentation testing, non-destructive testing, environmental monitoring services)., NAICS 541330 – Engineering Services (Geotechnical engineering, structural engineering support, materials engineering support, environmental consulting related to engineering aspects)., NAICS 541620 – Environmental Consulting Services (Environmental compliance and monitoring, including SWPPP and hazardous materials inspection)., NAICS 237110 – Water and Sewer Line and Related Structures Construction (Inspection services for pipeline and utility infrastructure)., NAICS 238320 – Painting and Wall Covering Contractors (Protective coatings and corrosion control inspection services)., NAICS 238190 – Other Foundation, Structure, and Building Exterior Contractors (Structural and deep foundation inspections).

Records and Due Date

This bid opportunity was entered into BidAmerica on February 20, 2026, and was last updated on February 20, 2026. All bids and/or proposals are due on March 10, 2026.

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Legal Disclaimer

All bidders are responsible for reviewing and verifying all official bid documentation directly from the issuing agency. BidAmerica aggregates public bid information for advertisement purposes for contractors and government agencies convenience. This Notice of Invitation to Bid is for reference purposes only and is not an official or complete representation of any documents issued by Vacaville City. BidAmerica does not guarantee the accuracy, completeness, or timeliness of any information displayed and shall not be held liable for any errors, omissions, misinterpretations, or damages resulting from reliance on this summary. Contractors must obtain all official information—including plans, specifications, addenda, deadlines, submission requirements, qualifications, and bidding conditions—directly from Vacaville City prior to bidding.