Unofficial Notice of Invitation to Bid (NIB)

California State Dept of Transportation (CalTrans) is seeking bids from qualified and interested contractors for the following project titled, On-Call Best Management Practices (BMP) Effectiveness, BMP Evaluation, BMP Development and Water Quality Monitoring Services, identified under Solicitation ID: 43A0512. Work is to be performed near Orange County, CA, USA in Orange County.

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General Project Description

This Request for Qualifications (RFQ) is for an On-Call Agreement to provide Best Management Practices (BMP) Effectiveness, BMP Evaluation, BMP Development, and Water Quality Monitoring Services for Caltrans, HQ Division of Environmental Analysis, District 43. The consultant will deliver professional and technical services on an as-needed basis to support Caltrans in complying with statewide and region-specific monitoring and compliance requirements outlined in various National Pollutant Discharge Elimination System (NPDES) Permits (including Orders 2022-0033-DWQ, 2022-0089-DWQ, 2022-0057-DWQ, R6T-2016-0010, 2018-0028-DWQ, and USEPA CGP) and local stormwater regulations. The scope encompasses analyzing and reporting on existing and new BMP effectiveness, evaluating BMP feasibility, developing new or modified BMP designs, and conducting water quality monitoring through field sampling, testing, and laboratory analyses for physical, chemical, microbiological, and aquatic toxicity parameters. Services will be performed by or under the direction of California licensed engineers.

General Bid Items

Quantity: - Unit: - Work Item: Best Management Practices (BMP) Effectiveness, Evaluation, Development, and Water Quality Monitoring Consulting Services.
Quantity: - Unit: - Work Item: Preparation of Quality Assurance Project Plans (QAPP), Health and Safety Plans (HSP), and Sampling and Analysis Plans (SAP).
Quantity: - Unit: - Work Item: Storm event updates and reporting.
Quantity: - Unit: - Work Item: Electronic Data Deliverable (EDD) submittals.
Quantity: - Unit: - Work Item: Water quality monitoring reports.
Quantity: - Unit: - Work Item: BMP effectiveness, evaluation, and design reports.
Quantity: - Unit: - Work Item: Site reconnaissance technical memorandum for monitoring and BMP pilot site suitability.
Quantity: - Unit: - Work Item: Basis of design report to document design decisions.
Quantity: - Unit: - Work Item: Plans, Specifications, and Estimates for BMP design (including traffic control plans and water pollution control plans).
Quantity: - Unit: - Work Item: Permit applications for BMP design.
Quantity: - Unit: - Work Item: Post-storm technical memorandum to document mobilization events and sampling results.
Quantity: - Unit: - Work Item: End of season technical memorandum to document mobilization activities for each rain season.
Quantity: - Unit: - Work Item: Storm event forecasting and notifications prior to each mobilization.
Quantity: - Unit: - Work Item: Storm event updates and reporting after each mobilization.
Quantity: - Unit: - Work Item: Water quality field reviews and additional monitoring for new pollutants of concern.
Quantity: - Unit: - Work Item: Field sampling, testing, and laboratory analyses for various pollutant types (Flow, pH, Temperature, Turbidity, Dissolved Oxygen, Hardness, Total Dissolved Solids, Total Suspended Solids, Oil and Grease, Hydrocarbons, Ammonia, Total Kjeldahl Nitrogen, Nitrate, Total Phosphorus, Aluminum, Chromium, Copper, Iron, Lead, Zinc, Selenium, Fecal Coliform, Enterococcus, Polychlorinated Biphenyls, Organochlorine Pesticides), U.S. EPA and Standard Methods apply.
Quantity: - Unit: - Work Item: Water Column Toxicity testing.
Quantity: - Unit: - Work Item: Development and maintenance of the stormwater monitoring plan.
Quantity: - Unit: - Work Item: Assistance in preparation of studies and reports to comply with Caltrans' Stormwater Management Plan (SWMP) and regional/state water board requirements.

NAICS Classification

541620 – Environmental Consulting Services: For providing specialized consulting, research, and technical services related to environmental management, water quality, stormwater management plans, and regulatory compliance., 541330 – Engineering Services: For architectural and engineering (A&E) services, including BMP design, evaluation, and development, which require California licensed engineers., 541715 – Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology): For conducting literature searches, developing new BMP concepts, and performing laboratory testing related to BMP development., 541380 – Testing Laboratories: For performing field sampling, testing, and laboratory analyses of water, soil, and other materials for physical, chemical, microbiological, and aquatic toxicity.

Records and Due Date

This bid opportunity was entered into BidAmerica on December 22, 2025, and was last updated on December 19, 2025. All bids and/or proposals are due on January 6, 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 California State Dept of Transportation (CalTrans). 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 California State Dept of Transportation (CalTrans) prior to bidding.