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OPEN Groundwater Modeling and Reporting Services for the West Coast Basin Barrier Project

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RFP-DS-0151State & Local

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

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West Basin Municipal Water District is soliciting proposals under RFP-DS-0151 for qualified firms to provide groundwater modeling and reporting services for the West Coast Basin Barrier Project (WCBBP). The project utilizes a hydraulic barrier to prevent seawater intrusion into groundwater aquifers and is strictly regulated by the Los Angeles Regional Water Quality Control Board Barrier permit R4-2006-0069, Title 22 Recycled Water Regulations for Groundwater Recharge, and the Recycled Water Policy. Key deliverables include the performance of annual groundwater modeling and the preparation of a technical memorandum for annual reports, as well as a modeling component for the WCBBP Five-Year Engineering Report, which requires review by a California-registered Professional Geologist. Proposals are due by October 20, 2026, at 2:00 pm via the OpenGov e-procurement system, with a recommended award notice expected the week of November 16, 2026. Evaluation is based on a 100-point scale considering proposal quality, firm experience in seawater barrier systems, key personnel qualifications, technical methodology, and three references from the last five years. Additional incentive points are available for certified Small, Local, or Veteran Owned Business Enterprises. Selected vendors must comply with California prevailing wage laws, maintain specific insurance coverages naming West Basin as an additional insured, and agree to a three-year audit period for all invoices.

General Info

RFP for groundwater modeling and reporting services for the West Coast Basin Project.

Agency

California → West Basin Municipal Water District

NAICS

541330 - Engineering Services

Place of Performance

CA, USA

Set-Aside

NONE

Documents

(1)

RFP: Groundwater Modeling and Reporting Services

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Organization & Contact Information

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AgencyCalifornia → West Basin Municipal Water District
Contacts1 person available
OfficeCA, USA
Organization / AgencyCalifornia → West Basin Municipal Water District
Office AddressCA, USA
Contacts
David Shull
contact@example.gov
+1 (555) 000-0000

Full Description

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Summary West Basin Municipal Water District is seeking qualified firms to perform groundwater modeling services. This work is in support of the ongoing West Coast Basin Barrier Project (WCBBP). The WCBBP uses a hydraulic barrier to prevent seawater intrusion into groundwater aquifers. The project is regulated by the current Barrier permit (R4-2006-0069) issued by the Los Angeles Regional Water Quality Control Board (LARWQCB), the Title 22 Recycled Water Regulations for Groundwater Recharge, and the Recycled Water Policy. Annual groundwater modeling is a requirement of the permit and required topic for the WCBBP Five-Year Engineering Report submitted to regulators. Background West Basin Municipal Water District produces advanced-treated recycled water that is blended with potable water and injected into a hydraulic barrier to prevent seawater intrusion in the West Coast Groundwater Basin. The West Coast Basin Barrier Project (WCBBP) is governed by multiple documents, including the following: R4-2006-0069; a permit issued by the Los Angeles Regional Water Quality Control Board (LARWQCB) Title 22 of the California Code of Regulations (indirect potable reuse groundwater recharge regulations) the Recycled Water Policy (amended in 2018 by the State Water Board). Groundwater modeling is an important part of the WCBBP. The permit requires modeling to be performed annually. An updated technical memorandum discussing the previous year's model results must be included with each annual Barrier report. The five-year engineering report also requires a modeling component and the review of a Professional Geologist (PG), registered in California. Timeline Solicit Proposals: September 30, 2026 Question Auto Disable After Due Date: October 12, 2026, 2:00pm Last Day for Comments or Questions: October 12, 2026, 2:00pm Proposal Due: October 20, 2026, 2:00pm Notice of Recomended Award: Week of 11/16/2026 Click on this link for RFP-DS-0151 details and attachments: https://procurement.opengov.com/portal/westbasin/projects/306879

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