Sol_140G0225Q0118_Amd_0001.pdf

(x)

140G0225Q0118 x x

1 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted ; or (c) By separate letter or electronic communication which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGEMENT 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.

x

GDB

DENVER CO 80225-0046

204 DENVER FEDERAL CENTER

PO BOX 25046

USGS OAG DENVER ACQUISITION BRANCH

08/28/20250001

13. THIS ITEM ONLY APPLIES TO MODIFICATION OF CONTRACTS/ORDERS. IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

12. ACCOUNTING AND APPROPRIATION DATA (If required) is not extended.is extended, Items 8 and 15, and returning

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

The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

FACILITY CODE CODE

10B. DATED (SEE ITEM 13)

10A. MODIFICATION OF CONTRACT/ORDER NO.

9B. DATED (SEE ITEM 11)

9A. AMENDMENT OF SOLICITATION NO.

CODE

8. NAME AND ADDRESS OF CONTRACTOR (No., street, county, State and ZIP Code)

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

PAGE OF PAGES

4. REQUISITION/PURCHASE REQ. NO.3. EFFECTIVE DATE2. AMENDMENT/MODIFICATION NO. 5. PROJECT NO. (If applicable)

1. CONTRACT ID CODE

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

08/22/2025

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

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority) appropriation data, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(b).

E. IMPORTANT: Contractor is not is required to sign this document and return __________________ copies to the issuing office.

ORDER NO. IN ITEM 10A.

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

A. The purpose of this amendment is to provide questions and answers, update background information, changes to the specifications, and extend the quotation due date.

1. Provide Questions and Answers as Attachment A. (See Attachment A for details)

2. Updated USGS Mercury Research Laboratory¿s background information in Section B as this information was outdated:

From:

The USGS Mercury Research Lab is a complete and full-service operation. We specialize in

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16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)15A. NAME AND TITLE OF SIGNER (Type or print)

15C. DATE SIGNED 16B. UNITED STATES OF AMERICA 15B. CONTRACTOR/OFFEROR 16C. DATE SIGNED

(Signature of person authorized to sign) (Signature of Contracting Officer)

Lisa Williams

STANDARD FORM 30 (REV. 11/2016)

Prescribed by GSA FAR (48 CFR) 53.243

Previous edition unusable

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

ITEM NO. SUPPLIES/SERVICES QUANTITY UNIT UNIT PRICE AMOUNT

NAME OF OFFEROR OR CONTRACTOR

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(A) (B) (C) (D) (E) (F)

140G0225Q0118/0001 methyl and total mercury concentration analyses on most environmental matrices. We also measure stable mercury isotopes on amended or natural samples. Other services include select ancillary variables, in-lab filtration, and sample lyophilization & homogenization.

To:

The USGS Mercury Research Lab is a complete and full-service operation. We specialize in methyl and total mercury concentration and isotope analyses. We perform natural abundance stable mercury isotope measurements on a variety of natural and experimental samples. The laboratory is also expanding into the measurement of lithium and other stable isotope systems. Other services include select ancillary variables, in-lab filtration, and sample lyophilization & homogenization.

3. Changes to the following specifications have been made:

3.1 Specification Number 1.a. has been changed:

From:

a. The instrument must allow for the direct coupling with manual and automated gas chromatography systems and produce average peak ratio or peak apex ratio data without additional file conversion processes or third-party software.

To:

a. The instrument must allow for the direct coupling with manual and automated gas chromatography systems and produce average peak ratio or peak apex ratio data without additional file conversion or export processes.

3.2 Specification Number 7. has been changed

From:

7. The instrument must have a water-cooled magnet option to ensure optimal thermal stability of the magnetic sector.

Continued ...

NSN 7540-01-152-8067 OPTIONAL FORM 336 (4-86)

Sponsored by GSA

FAR (48 CFR) 53.110

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140G0225Q0118/0001

To:

7. The instrument must have a water-cooled chiller option for the magnet sector to ensure optimal thermal stability due to infrastructure requirements.

3.3 Specification Number 10. has been changed:

From:

10. Instrument must have at least 11 Faraday cups. This configuration should be capable of simultaneously measuring isotope ratios for masses between 198-205 (i.e., 198-Hg, 199-Hg, 200-Hg, 201-Hg, 202-Hg, 203-Tl, 204-Hg, and

205-Tl) within a single analysis and allow for the optimization of cup positions within the instrument software.

To:

10. Instrument must have at least 11 Faraday cups. This configuration should be capable of simultaneously measuring isotope ratios for masses between 198-205 (i.e., 198-Hg, 199-Hg, 200-Hg, 201-Hg, 202-Hg, 203-Tl, 204-Hg, and

205-Tl) within a single analysis.

3.4 Specification Number 11 has been changed:

From:

11. Instrument must include at minimum 11 standard 1011 ohm amplifiers with a 100 V dynamic range and allow for future installation of 1013 ohm amplifiers as needed.

To:

11. Instrument must include at minimum 11 standard 1011 ohm amplifiers with a 100 V dynamic range and allow for installation of 1013 ohm amplifiers.

3.5 Removed Specification Number 15.e.: Ability

to set collector cup positions (fully automated) in its entirety.

3.6 Specification Number 15 has been changed:

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From:

15. The software that controls the instrument shall be modern, flexible, user-accessible, and easy-to-use and include the following:

To:

15. The software that controls the instrument shall include the following:

3.7 Specification Number 15.d. has been changed:

From:

d. Ability to control the baking system through the instrument software

To:

d. Ability to initialize and monitor the baking system through the instrument software

3.8 Specification Number 15.i. has been changed

and is now under Number 15.h.:

From:

h. Ability to control peripherals such as desolvating nebulizers and autosamplers (without the use of third-party software).

To:

h. Ability to control peripherals such as autosamplers or other sample introduction systems.

3.9 Specification Number 16. has been changed:

From:

16. The instrument must have the capability for future upgrade to an MS/MS option made up of a collision/reaction cell with a pre-cell mass filter. All settings (e.g. filters, slits, and gas flows) within this region shall be software controlled without the need to break vacuum.

To:

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16. The instrument must have the capability for future upgrade or conversion to an MS/MS option made up of a collision/reaction cell with a pre-cell mass filter to accommodate expanding analytical capabilities within the laboratory.

(See Attachment 1 - Revised Specifications)

4. Extended the quotation due date to September

9, 2025, no later than close of business 2:30 p.m. Mountain Daylight Time (MDT).

ALL OTHER TERMS AND CONDITIONS ARE UNCHANGED

NSN 7540-01-152-8067 OPTIONAL FORM 336 (4-86)