B08_REVISED_Attachment_1_Scope_of_Work_140P8626Q0009_rev_3_March_2026_0004.pdf

Scope of Work

Replace Pump Station 840 Generator

Golden Gate National Recreation Area

REVISED 3 March 2026

(see items in red for changes to the original Scope of Work)

Objective

Golden Gate National Recreation Area (GGNRA) desires to solicit a request for quote to qualified vendors to replace the existing 135kW 169 kVA 277/480v Three-Phase Diesel Genset and Option Item Automatic

Transfer Switch (ATS) in lift station 840 Bunker Rd, Sausalito, California, 94965.

Background

The Marin Headlands is a robust community of park visitors, non-profits, park partners, residences, concessionaires, and housing for 134 NPS staff members and interns. Over 4 million visitors per year visit the

Marin Headlands. Sewage from the Marin Headlands is pumped via forced main through the Baker Barry tunnel to Fort Baker. Pump station 840 is the final station in the Marin Headlands. From this station, all sewage produced in the Marin Headlands is pumped via forced main out of the Marin Headlands to Fort Baker, and from there to the Sausalito Sewer District. The station pumps around 60,000 gallons of sewage a day during dry weather and 150,000 gallons during rain events. The station is powered by three-phase power supplied by PG&E and is backed up by a NPS-owned stationary diesel generator. In August,August 2025 it was discovered that the ATS was not functioning properly. Replacement of the existing genset and ATS with a new genset and ATS that match the performance standards of the existing is required.

Project Description

The contractor will be responsible for the removal and disposal of the existing Kohler generator (model

#135ROZJ, Serial #0729271, Spec PA-189724). The contractor will fully furnish and fully install a new genset that matches the performance of the existing generator and a fuel tank that fits within the existing genset skid mount perimeter and/or equipment pad. The existing genset dimensions are 2’-11” x 8’-9”, with a roof height clearance of 10’0” to the truss bottom chord. See the attached figure for additional dimensions..

The contractor will remove and dispose of the existing automatic transfer switch (ATS) panelboard and replace with new, such that it matches is compatible with the performance requirements of the replacement generator standards of the existing. Replacement of the ATS is limited to the panelboard unit and the existing housing cabinet shall be reused and remain in place. The contractor shall provide replacement to the existing manual transfer switch (MTS). The existing disconnect switch panel box shall remain. Provide specifications

(including dimensions) of the replacement MTS unit.

For the proposed replacement genset, provide the maximum fuel tank size (and the approximate run time) given the existing space constraints stated. All electrical, controls, gas, and mechanical exhaust connections, and any associated appurtenances must be completed by the vendor. No modifications of the existing building are allowed. The existing building is not fire rated. The contractor will test operation of all equipment.

The new generator shall satisfy Tier 4 requirements and must be compliant with the rules and regulations of the California Air Resource Board (CARB) and the Bay Area Air Quality Management District (BAAQMD).

The contractor is responsible for applying and obtaining a permit to operate the new genset, as well as any required retirement permit for the existing genset, from the BAAQMD.

Additional Requirements

• Backup Generator Coverage: If the backup generator is offline overnight at any point during the project, the contractor shall provide and connect a temporary backup generator to ensure uninterrupted

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RFQ 140P8626Q0009 Replace Pump Station 840 Generator

Attachment 1 Scope of Work REVISED 3 March 2026 Golden Gate National Recreation Area emergency power coverage for the lift station. The temporary generator shall power 100 hp pumps at

125 amps at 480v, 3-phase.

• Permit Compliance: The new generator shall not be operated until the BAAQMD permit to operate has been issued and is active. If the contractor chooses to install the new generator before the permit is live, they must provide and maintain a temporary backup generator on-site and connected until the permit is active and the new generator is legally operable.

• The genset shall be UL listed.

• All controls shall be fully accessible.

• Contractor is responsible for field verifying measurements and the suitability of all existing connections, pads, etc.

• The contractor shall furnish park a one-year warranty of parts and labor upon acceptance.

Complete system shall not be shut down for longer than 90 minutes. If the contractor requires longer than a 90-minute shutdown to perform the work, the contractor shall provide sewage truck pumping/transport to the upstream manhole to maintain uninterrupted services to the sewage line during the ongoing repair activities. Or provide electrical bypass to the existing pump system.

Cleanup of any sewer overflows during work on the system will be the responsibility of the contractor.

Contractor will also be responsible for any fees or fines associated with any sewage spills during the generator swap. Additionally, Contractor shall implement best management practices (BMPs) to prevent fuel spills, debris, or contaminants from entering storm drains or natural areas. Any spills must be reported immediately and remediated at the contractor’s expense.

Contractor will be responsible for removal and proper disposal of all old equipment. Contractor will be responsible for removing all fuel prior to the removal of the existing gen set. Contractor is responsible for fully filling the fuel tank of the new generator at the end of the project. Any gaskets, adhesives, lubricants, or incidental parts will be furnished by the contractor.

Prior to the notice to proceed, contractor will provide, at a minimum, the following submittals:

• Designation of project superintendent and project manager

• Proof of insurance and bonding

• Safety plan

• Genset product specifications

• Automatic Transfer Switch product specifications

After completion of work, contractor will provide, at a minimum, the following submittals:

• Operations and maintenance sheets

• BAAQMD permits

• Warranties

List of Contract/Option Line Items

Base Bid:

• Contract Line Item 1 o Replace 840 Genset (Generator Set)

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Option Item:

• Option Item 1 o Replace 840 Automatic Transfer Switch (ATS)

ON-SITE WORK HOURS: Work shall be generally performed during normal business working hours of 8 a.m. to 5 p.m., Monday through Friday, except when otherwise indicated. No holiday will be allowed.