Unofficial Notice of Invitation to Bid (NIB)

Sanitation Districts of Los Angeles County is seeking bids from qualified and interested contractors for the following project titled, ON-CALL MANHOLE REHABILITATION SERVICES, identified under Solicitation ID: 04216. Work is to be performed near 1955 Workman Mill Rd, Whittier, CA 90601, USA in Los Angeles County.

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General Project Description

The project involves on-call rehabilitation services for approximately 100 deteriorated sewer manholes per year, including special structures, across the Los Angeles County Sanitation Districts' service area. The rehabilitation methods include High-Density Polyethylene (HDPE) lining, Polyvinyl Chloride (PVC) lining, Fiberglass lining systems, Calcium Aluminate Cement (CAC) coating, Polyurethane protective coating, and Epoxy protective coating systems. The scope of work also includes associated tasks such as traffic control, obtaining encroachment permits, cleaning and surface preparation (e.g., removal of weakened concrete/brick, thorough cleaning for contaminants, removal of hydrogen sulfide damaged concrete, repairing exposed reinforcing steel), patching, localized repairs, resurfacing, eliminating active infiltration, and testing (e.g., holiday detection, adhesion testing, thickness verification, compressive strength testing). The Districts anticipate selecting up to four firms for a three-year on-call agreement, with an option for a one-year extension.

General Bid Items

Quantity: - Unit: - Work Item: Preparation of manhole surfaces (cleaning, inspection, surface preparation). Specifications: Per SSPC-SP CAB1, SSPC-SP13/ NACE No 6 Surface Preparation of Concrete, ICRI-CSP6 (CSP between 4 and 6), thorough removal of grease, sludge, dirt, roots, magnesium hydroxide, other foreign deposits, chemical contaminants.
Quantity: - Unit: - Work Item: Removal of weakened concrete and brick. Specifications: Down to firm substrate, for CAC, polyurethane, and epoxy coating systems.
Quantity: - Unit: - Work Item: Rehabilitation of manholes with Calcium Aluminate Cement (CAC) coating system. Specifications: Minimum dry coating thickness 0.75 inch, from bottom of manhole frame to 4.0 inches below shelf (including shelf top), using SewperCoat or Strong-Seal High Performance Mix or approved equal.
Quantity: - Unit: - Work Item: Rehabilitation of manholes with Polyurethane protective coating system. Specifications: Epoxy primer (min 6 mils DFT) and high-build polyurethane topcoat (min 1/8-inch (125 mils) DFT on shaft, 1/4-inch (250 mils) DFT on base), from bottom of manhole frame to 4.0 inches below shelf (including shelf top). Materials: Zebron #386/9000 or Sancon 100 or approved equal.
Quantity: - Unit: - Work Item: Rehabilitation of manholes with Epoxy protective coating system. Specifications: High-build 100% solids, solvent-free epoxy resin (min 1/8-inch (125 mils) DFT on shaft, 1/4-inch (250 mils) DFT on base); keyed into substrate with 1/4-inch deep x 1/4-inch wide keyway. Materials: Tnemec Series 434, Sauereisen Sewergard 210, Neopoxy NPR-5304/5 or approved equal.
Quantity: - Unit: - Work Item: Installation of High-Density Polyethylene (HDPE) lining system. Specifications: Min 0.079 inch (2 mm) thick HDPE plastic liner with locking extensions (min 0.51 inch (13 mm) height studs), PE3408 polyethylene resin material, yellow color. Seams by extrusion welding, use of H-profile, tear-off profile & corner profile connections. Seal joints with sealant.
Quantity: - Unit: - Work Item: Installation of Polyvinyl Chloride (PVC) protective lining system. Specifications: PVC membrane between two (2) layers of fiberglass (e.g., Poly-Triplex® Liner System) or PVC membrane as outer layer (e.g., AltLiner™CIPM™ Liner System). Includes removal of existing PVC liner, concrete repair. Primer applied at 1 gallon/200 SF, epoxy mastic at min 375 mils DFT.
Quantity: - Unit: - Work Item: Installation of Cured-In-Place Fiberglass Lining System. Specifications: Polyvinyl Chloride (PVC) membrane between two (2) layers of fiberglass. Includes bypass/diversion of sewers, construction of baffle walls, removal of old CIPP liner, and sealing seams with Sikadur 31 or equal.
Quantity: - Unit: - Work Item: Enforcement of Traffic Control. Specifications: Per “California Manual on Uniform Traffic Control Devices” (CA MUTCD) or “Work Area Traffic Control Handbook” (WATCH) and local regulations.
Quantity: - Unit: - Work Item: Obtaining Permits and Licenses. Specifications: All applicable federal, state, and local permits and business licenses, including encroachment permits for public right-of-way.
Quantity: - Unit: - Work Item: Repair of reinforcing steel. Specifications: Sandblasting and coating with 40 mils of Sikatop Armatec 110 EpoCem, Sika Corporation, or BASF Emaco P24, or equal. Replacement if >50% cross-sectional area missing.
Quantity: - Unit: - Work Item: Patching, localized repairs, and resurfacing. Specifications: In accordance with coating manufacturer’s recommendations. Active infiltration to be eliminated. Concrete shelf reconstruction.
Quantity: - Unit: - Work Item: Testing and Inspection. Specifications: Coring for thickness verification (CAC), holiday detection testing (Polyurethane, Epoxy, HDPE), adhesion testing (Polyurethane, Epoxy, PVC), compressive strength testing (CAC). All repairs due to testing to be performed by contractor.

NAICS Classification

NAICS 237110 – Water and Sewer Line and Related Structures Construction (Manhole rehabilitation, lining, and coating are specialized activities within sewer infrastructure construction.), NAICS 238320 – Painting and Wall Covering Contractors (Coating systems like Calcium Aluminate Cement, Polyurethane, and Epoxy fall under protective coating application.), NAICS 238990 – All Other Specialty Trade Contractors (Activities like installation of HDPE, PVC, and fiberglass lining systems that are not explicitly covered by a more specific NAICS code, but are specialized construction trades.)

Records and Due Date

This bid opportunity was entered into BidAmerica on February 24, 2026, and was last updated on February 24, 2026. All bids and/or proposals are due on March 31, 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 Sanitation Districts of Los Angeles County. 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 Sanitation Districts of Los Angeles County prior to bidding.