Offers must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended, by one of the following methods:

(a) By completing items 8 and 15, and returning or (c) By separate letter or electronic communication which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by letter or electronic communication, provided each letter or electronic communication makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

E. IMPORTANT: is not is required copies to the issuing office.

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT 1. CONTRACT ID CODE

2. AMENDMENT/MODIFICATION NUMBER 3. EFFECTIVE DATE 4. REQUISITION/PURCHASE REQUISITION NUMBER 5. PROJECT NUMBER (If applicable)

7.ADMINISTERED BY (If other than Item 6) CODE

STANDARD FORM 30 (REV. 11/2016)

Prescribed by GSA FAR (48 CFR) 53.243

FACILITY CODE

9A. AMENDMENT OF SOLICITATION NUMBER

9B. DATED (SEE ITEM 11)

10A. MODIFICATION OF CONTRACT/ORDER NUMBER

10B. DATED (SEE ITEM 13)

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

The above numbered solicitation is amended as set forth in Item 14. is extended. is not extended.

12. ACCOUNTING AND APPROPRIATION DATA (If required) copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS.

IT MODIFIES THE CONTRACT/ORDER NUMBER AS DESCRIBED IN ITEM 14.

CHECK ONE A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE CONTRACT ORDER

NUMBER IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation data, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(b).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority)

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

15C. DATE SIGNED

15A. NAME AND TITLE OF SIGNER (Type or print)

16C. DATE SIGNED

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

PAGE

6. ISSUED BY CODE

8. NAME AND ADDRESS OF CONTRACTOR (Number, street, county, State and ZIP Code) (X)

CODE

15B. CONTRACTOR/OFFEROR

(Signature of person authorized to sign)

16B. UNITED STATES OF AMERICA

(Signature of Contracting Officer)

Previous edition unusable

PAGESOF

Contractor

The hour and date specified for receipt of Offers to sign this document and return

Karen La Bouff-Kind

See continuation page

USGS OAG DENVER ACQUISITION BRANCH

PO BOX 25046

204 DENVER FEDERAL CENTER

DENVER CO 80225-0046

USGS OAG DENVER ACQUISITION BRANCH

PO BOX 25046

DENVER CO 80225-0046

GDB

GDB

140G0226R0001

02/05/2026

02/05/2026

1 4

CONTINUATION SHEET

REFERENCE NO. OF DOCUMENT BEING CONTINUED PAGES

NAME OF OFFEROR OR CONTRACTOR

SUPPLIES/SERVICES

(B)

UNIT

(D)

UNIT PRICE

(E)

AMOUNT

(F)

OPTIONAL FORM 336 (4-86)

Sponsored by GSA FAR (48 CFR) 53.110

ITEM NO.

(A)

QUANTITY

(C)

NSN 7540-01-152-8067

140G0226R0001/0002

The purpose of this amendment is to provide an updated Statement of Work (SOW) and to provide answers to contractor questions and replaces the previous SOW.

a) Q1. What is the date for the pre-proposal site visit?

A1: February 19, 2026 at 1:30 PM AST.

b) Q2: Puerto Rico regulations require that photovoltaic systems larger than 25 kW that will be grid-connected require LUMA approval before project implementation. This process takes between 30 and 60 days. The documents sent require that the project be completed within 45 days of the notice to proceed. Will this system be grid-connected?

If yes, 45 days is likely not enough time.

A2: As stated on pages 2 & 3 of the

Statement of Work (SOW), the solar system shall not feed power back to the electric utility grid that is, the system shall be a zero export/feed-in metering system.

c) Q3: Will the photovoltaic system be built to cover 100% of the energy consumption based on the provided information of 5060 kWh per month?

A3: As stated on page 6 of the SOW, the contractor shall confirm existing site conditions and measurements including analysis of electrical power consumption. And on page 3 of the SOO, contractor shall list any power usage or other quantities listed in this document and are estimates only.

d) Q4: Do you plan to participate in the net metering program with this system?

A4: As stated on pages 2 & 3 of the updated

Statement of Work (SOW), the solar system shall not feed power back to the electric utility grid that is, the system shall be a zero export/feed-in metering system.

Continued...

NAME OF OFFEROR OR CONTRACTOR

SUPPLIES/SERVICES

(B)

UNIT

(D)

UNIT PRICE

(E)

AMOUNT

(F)

OPTIONAL FORM 336 (4-86)

Sponsored by GSA FAR (48 CFR) 53.110

ITEM NO.

(A)

QUANTITY

(C)

e) Q5: How many days of autonomy are you requiring for the batteries? (How long will the facility be powered in a power outage using only the batteries, assuming there is no solar or grid power?)

A5: As stated on page 8 of the updated SOW, contractor shall ensure that the S+B-BPS provides sufficient power to operate the fourteen (14) designated buildings at full normal power usage for a minimum of 72 hours from the time the utility power fails. Also on page 8, contractor shall successfully provide power equivalent to utility power over a non-interrupted 72-hour period test of the

S+B-BPS system. S+B-BPS is solar power plus lithium iron phosphate (LiFePO) battery storage backup power system (S+B-BPS).

f) Q6: Will all the site's electrical loads be supplied by the batteries in a power outage?

A6: As stated on page 8 of the updated SOW, contractor shall ensure that the S+B-BPS provides sufficient power to operate the fourteen (14) designated buildings at full normal power usage for a minimum of 72 hours from the time the utility power fails. Also on page 8, contractor shall successfully provide power equivalent to utility power over a non-interrupted 72-hour period test of the

S+B-BPS system. S+B-BPS is solar power plus lithium iron phosphate (LiFePO) battery storage backup power system (S+B-BPS).

g) Q7: Will the power conditioning unit protect the entire facility?

A7: As stated on page 3 of the updated SOW, contractor shall install a power conditioning system to ensure that under- or over-voltage events are handled properly before reaching any of the buildings.

h) The document

01_SJG_Backup_Power_System_SOW_021826 replaces

San Juan Magnetic Observatory New Solar and

Backup Power System Installation (B03 Atch 1

Continued...

NAME OF OFFEROR OR CONTRACTOR

SUPPLIES/SERVICES

(B)

UNIT

(D)

UNIT PRICE

(E)

AMOUNT

(F)

OPTIONAL FORM 336 (4-86)

Sponsored by GSA FAR (48 CFR) 53.110

ITEM NO.

(A)

QUANTITY

(C)

SOW SJPR Magnetic Observatory New Solar Backup

Power Install.docx) as the Statement of Work.

i) The quote due date and all other terms and conditions remain unchanged.

Period of Performance: 04/01/2026 to

05/16/2026

Change Item 00010 to read as follows(amount shown is the obligated amount):

00010 1 EASolar/backup power/power conditioning (See attached SOW) - Amendment 002

Services, non-personal to provide all plant, equipment, labor, material and supervision

(unless otherwise provided herein) necessary for the construction of a new solar power system and backup system for replacement at

USGS San Juan Magnetic Observatory, San Juan, Puerto Rico in accordance with the attached specifications, drawings and terms and conditions.

Anticipated Award Type: Firm-fixed-price

Product/Service Code: 6117

Product/Service Description: SOLAR ELECTRIC

POWER

SYSTEMS

AWARD TYPE: FIRM FIXED PRICE

TECHNICAL POC: KRISTEN LEWIS, Email:

klewis@usgs.gov

ADMIN POC: ROBIN DAVIS, Email:

rdavis07@usgs.gov

CONTRACT SPECIALIST: PHILIP ROBINSON, Email:

probinson@usgs.gov

Sponsored by GSA FAR (48 CFR) 53.110