Project Information

Bid Title

Torrance Refinery Water Recycling Plant Microfiltration Feasibility Study

Issuing Agency

West Basin Municipal Water District

Location

California

Published Date

Feb 2, 2026

Closing Date

Feb 26, 2026

Government Level

State & Local

Status

Closed

Ref. #

RFP-TH-0117

Original Source

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Project Description

Project ID: RFP-TH-0117

Title: Torrance Refinery Water Recycling Plant Microfiltration Feasibility Study

Addenda: 0

Release Date: 2/2/2026

Due Date: 2/26/2026

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Torrance Refinery Water Recycling Plant Microfiltration Feasibility Study

Request For Proposal

Engineering

88596 , 89095 , 89597 , 92064 , 92533

Project ID: RFP-TH-0117

Release Date: Monday, February 2, 2026

· Due Date: Thursday, February 26, 2026 2:00pm

Posted Monday, February 2, 2026 3:00pm

All dates & times in Pacific Time

Draft Response Events RSVP No Bid23 days, 20 hours, 2 minutes

Post Information

Posted At:Mon, Feb 2, 2026 3:00 PM
Sealed Bid Process:Yes (Bids Sealed / Pricing Sealed)
Private Bid:No

Overview

Summary

The Microfiltration system at the Torrance Refinery Water Recycling Plant was built in 1999 and consists of six units designed for a capacity of 3.73 MGD (518 gpm/unit). Deterioration over the years has reduced capacity to produce water. Replacement of the equipment and supportive ancillary is necessary. This project is to perform a feasibility study to identify the needs to replace the system, increase water production capacity, and potentially move and install West Basin's potable ultrafiltration system (PUF).

Background

West Basin Municipal Water District (West Basin) is soliciting proposals (RFP) to provide professional engineering services for the preparation of a Feasibility Study for the Microfiltration System Replacement at the Torrance Refinery Water Recycling Treatment Plant (TRWRP).

The TRWRP began operating in 1998 and is located in the City of Torrance on land leased from the Torrance Refinery, which was purchased from the ExxonMobil Oil Corporation by the Torrance Refinery Company LLC (TORC) in July 2016 and is now owned by PBF Energy. The TRWRP pulls ECLWRF Title 22 water off the recycled water distribution system to produce nitrified water for cooling towers and up to 3.2 mgd of low-pressure boiler feed (LPBF) water for Torrance Refinery. For the LPBF, West Basin treats Title 22 water through Microfiltration (MF) and Reverse Osmosis (RO) to produce LPBF water for a minimum reliable delivery of 2,200 gpm of RO water. The MF/RO treatment process starts with 500-micron strainers. The MF membranes at TRWRP are Memcor 90M10 CMF microfiltration units installed in 1999, a technology that is now owned and supported by DuPont Water Solutions. The Memcor 90M10 CMF units are pressurized microfiltration systems built around polypropylene (PP) modules and consist of six-rack units with an original design capacity each of 604 gpm to produce a total of 3.73 MGD of MF product water. MF effluent is pumped to the RO process followed by decarbonation for distribution as LPBF water. Each RO train originally had a design flow range of 440 – 660 gpm (approximately 8 – 11 gallons per square foot per day. The RO trains are configured in a 20:10:5 array with 6M vessels and operate at 85% permeate recovery. Currently, only three of the four RO trains are operated simultaneously to meet refinery demand, allowing for redundancy.

Originally installed in 1999, the MF equipment has experienced mechanical and equipment material degradation and failures resulting in an inability to meet refinery product water demand. Additionally, the PP membrane with the gas-backwash configuration of the 90M10C CMF system has demonstrated an inability to achieve original flux and production requirements, necessitating the use of potable water to supplement the RO feed supply. In general, the various components of the MF system (membranes, housing, piping, and supports) are in poor condition due to age and may not be salvageable or could require a significant rehabilitation to restore reliable production of LPBF water. Additionally, the existing MF system is an obsolete, proprietary technology and cannot readily accept PVDF membrane conversion without significant modifications to the system (e.g. PP membrane is not tolerant to exposure to oxidants, so the cleaning system does not currently allow for conventional clean-in place methods such as free-chlorine solutions. The system may not accommodate modern replacement membranes from many of the qualified manufacturers available in the market today. Backwash waste is discharged into the feed of the onsite Biofor treatment system, and waste from this system is discharged to the Torrance Refinery in-plant sewer system. RO concentrate (brine) is discharged to the Torrance Refinery in-plant sewer system, which has limited hydraulic capacity and discharge quality limits. With this feasibility study, West Basin intends to evaluate various scenarios to be considered as potential solutions for the replacement of the existing MF System. Furthermore, West Basin is in active discussions with Metropolitan Water District of Southern California (MWDSC) about potentially conveying advanced treated water to West Basin's recycled water distribution system for its customers. The consultant shall make considerations of this possible outcome when developing alternatives for the MF system.

Timeline

Solicit Proposals:

February 2, 2026

Pre-Proposal Conference* (Non-Mandatory):

February 17, 2026, 10:00am

https://teams.microsoft.com/l/meetup-join/19%3ameeting_OWFlMzM5YjctODU1Mi00OGE1LWI1YzktNWZkYjJmNzA1M2I4%40thread.v2/0?context=%7b%22Tid%22%3a%227d5e0c6b-3aaf-4940-adde-6e44eba3abd2%22%2c%22Oid%22%3a%22c2e4b628-8e89-4cfc-9acb-bb7357e554f5%22%7d

Job Walk*:

February 17, 2026, 11:00am

Below is a link via Google Maps for the entrance of TRWRP:

https://maps.app.goo.gl/T5rER5w8VHT7UPqY8

When you enter the facility, please turn left and drive towards the fenced gate located near the perimeter fence.

Last Day for Comments or Questions:

February 19, 2026, 2:00pm

Proposal Due:

February 26, 2026, 2:00pm

Candidate Interviews / Presentations:

N/A

Notice of Recommended Award:

Week of March 9, 2026.

Recommendation to the Board of Directors:

March 23, 2026

Commodity Codes

• NAICS 541330Engineering Services
• NAICS 541620Environmental Consulting Services

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