B08_REVISED_Att_4_Questions___Answers_140P8626Q0009_revised_3_March_2026_0004.pdf

United States Department of the Interior

NATIONAL PARK SERVICE

CONTRACTING OPERATIONS - WEST

1849 C Street

NW Washington, DC 20240

140P8626Q0009

Replace Pump Station 840 Generator, GOGA

Question & Answers

REVISED 3 March 2026 (see page 5 for additional Q & A)

Question 1:

Is there an exterior emergency backup generator electrical connection?

Answer 1:

Yes, there is an exterior electrical connection located to the right of the roll up door.

Question 2:

What BMS or monitoring service is used for the backup generator and ATS? Monitor only or enable / disable?

Answer 2:

We only have generator status monitoring through our Sewage pump web-based SCADA system.

This data shows Gen Running / Not Running & Line Voltage.

Question 3:

New diesel generators require a Tier 4 emissions. Is the prime to include the DEF fluid in close out and testing?

Answer 3:

Any emissions or fluids needed to operate and test the generator will need to be supplied by the

Prime. See Scope of Work for additional requirements and details regarding test operation.

Question 4:

Will the new undermounted day tank require double containment?

Answer 4:

Due to space limitations and extended run time preferences the double containment may need to be bypassed and not included.

Question 5:

The current diesel tank is not vented to the exterior, and the scope states “No modifications of the existing building are allowed”. Please clarify for the new venting required.

Answer 5:

Venting in the same configuration is acceptable to the building interior. The large ventilation louvers provide adequate ventilation for the space.

Question 6:

Is the fuel tank level to be monitored by the BMS / monitoring system?

Answer 6:

See answer to Question #2.

Question 7:

Is an annunciator required for this scope? Audio and visual?

Answer 7:

RFQ 140P8626Q0009 Replace Pump Station 840 Generator

Attachment 4 Questions & Answers REVISED 3 March 2026

Annunciator is not required for the Scope of Work.

Question 8:

There is currently vibration isolation under the existing generator. The new generators do not require vibration isolation on concrete on grade slab. May this be omitted?

Answer 8:

It is preferred to maintain the existing features currently installed on the genset. It is understood that spring isolators are provided for vibrational and/or seismic requirements. Contractor shall provide specifications for an approved equal system such that spring isolators are not equipped in the replacement genset.

Question 9:

For sizing the fuel tank, how long of run time and at what percentage of generator capacity is desired?

Answer 9:

48-hour runtime preferred.

Question 10:

There is a disconnect between the generator and the ATS. Is this to be included or may it be reused?

Answer 10:

The current disconnect is allowed to be reused.

Question 11:

During the replacement of the ATS, how many hours may the location be without power to facilitate the replacement of only the ATS? Would 4 hours be acceptable?

Answer 11:

See answer to Question #12.

Question 12:

During the replacement of the ATS, is a sewage pump required to be on standby or onsite?

Answer 12:

If the ATS can be replaced in under 6 hours, a standby sewage pump may not be needed. This time frame can possibly extend with low sewage flows and clear weather. However, in accordance with the Scope of Work, the contractor is responsible for any potential cleanup of sewer overflows and shall provide a 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 pump system.

Question 13:

Is a convenience outlet required at the new generator?

Answer 13:

Convenience outlets are not required. The generator will power the building, which will energize the outlets inside the building.

Question 14:

Has the existing generator suffered a catastrophic failure?

Answer 14:

No failures have occurred to the existing generator.

Question 15:

Does the existing generator have a BAAQMD permit to operate (or can it get one)?

Answer 15:

The existing generator currently has a BAAQMD permit to operate. Contractor required to obtain new permit(s) for the replacement genset system. See Scope of Work for additional requirements.

Question 16:

Regarding the fuel tank: It appears to be integral to the generator. Do you wish to re-use, relocate or for us to provide a new fuel tank?

Answer 16:

The fuel tank shall be located inside the building. Relocation to the exterior of the building is not preferred. Contractor to provide replacement of both the generator and fuel tank.

Question 17:

What are the engine and generator system power specifications?

Answer 17:

Per Scope of Work – Reference Model Numbers:

• Generator System: Kohler 135ROZJ, Serial #072971, Spec PA-189724

135kW 169 kVA 277/480v Three-Phase Diesel Genset

• Engine: John Deere 6081TF001

Question 18:

Who will provide temporary generator during transfer?

Answer 18:

Contractor is required to provide temporary generator during transfer. See Scope of Work for shutdown and transfer requirements.

Question 19:

Is the replacement of manual transfer switch panel box part of the scope of work?

Answer 19:

Reusing the existing disconnect switch panel box is preferred. If not, contractor shall provide replacement panel that matches the specification requirements of the replacement ATS.

Question 20:

It appears that the Genset is part of the Base Bid and the ATS is Optional. Is installing one or the other an option?

Answer 20:

Genset is required in the base price and the ATS as an option price line item.

Question 21:

It appears that a Series 7000 ATS is currently installed. Would a Series 300 ATS be sufficient?

Answer 21:

Contractor shall provide an ATS that can match the minimum requirements of the replacement generator system.

Question 22:

What are the power requirements needed for the temporary generator?

Answer 22:

Temporary generator must power 100hp pumps pulling 125 amps at 480v 3 Phase.

Question 23:

Is replacement of the generator engine piping part of the scope of work?

Answer 23:

Yes, contractor shall replace all intake, exhaust piping, or any appurtenances to match the requirements and placement of the new genset. See Scope of Work for additional information.

Question 24:

What communication systems are in place for the Pump Station?

Answer 24:

There is no wi-fi at the Pump Station 840. The current communication sensing system is via

SCADA and is transmitted through a directional antenna.

Question 25:

Are there specific manufacturers required for the new replacement generator? If so, what manufactures are approved and are they to be listed on the contractor's proposal?

Answer 25:

There are no specific manufacturers required; please follow the Scope of Work.

Question 26:

What is the exact size of the existing generator's fuel tank?

Answer 26:

Tank size unknown. Please size new/replacement generator fuel tank for a minimum runtime of 48 hours without refueling.

Question 27:

What is the required minimum run time for the generator?

Answer 27:

See answer to Question #9.

Question 28:

Please confirm if the existing MTS is to be reused or replaced.

Answer 28:

Full replacement to the emergency disconnect switch is part of the scope of work. Also, see answer to Question #19.

Question 29:

Replacing the existing generator with in-kind does not conform to space requirements. Please advise.

Answer 29:

Clarification of how the replacement generator does not conform to space requirements (space offset code clearance, actual generator unit dimensions, etc.) is required to fully answer. It shall be noted that no modifications of the existing building and placement of the generator to the exterior of the building is allowed.

Question 30:

Is the intention to use existing ATS housing and replace components or a complete self-sustaining

ATS Panelboard?

Answer 30:

Existing cabinet to remain. Please reuse the existing ATS housing and replace the ATS components.

Below Q & A added with this revision 3 March 2026

Question 31:

Is this building fire rated? If not there are interior fuel storage limitations.

Answer 31:

The building is not fire rated. Please propose genset and ATS that would meet fuel storage limitations for a non-fire rated building. Based on this issue, please see REVISED Scope of

Work dated 3 March 2026.

Question 32:

Regarding the ATS, there were no specific requirements mentioned in the RFP. Is there more information that can be provided so we can see if a 7000 Series is needed? They are pricier and have specific accessories.

Answer 32:

Please provide any ATS sufficient to meet the requirements of the replacement generator given

Answer 31. Based on this issue, please see REVISED Scope of Work dated 3 March 2026.

Question 33:

Once the generator is in place, will a delay in getting permits, so the generator can be tested, result in a delay getting payment?

Answer 33:

Payment will be made once the project is accepted by the Government (after all permits have been received, testing has been successfully completed, certified payrolls from prime contractors and subcontractors (if applicable) have been approved, etc.).