Sol_140G0126Q0222_Amd_0001.pdf

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

Daniel Galvin

See continuation page

USGS OAG RESTON ACQUISITION BRANCH

205 NATIONAL CENTER

12201 SUNRISE VALLEY DRIVE

RESTON VA 20192

GRB

140G0126Q0222

07/24/2026

07/24/2026

1 3

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

140G0126Q0222/0001

MONITORING WELL ABANDONMENT, EASTON MD

140G0126Q0222 Amendment 1: Questions & Answers

Question 1. Does the 2-inch PVC casing begin at approximately 61 feet below ground surface through a 6-inch-to-2-inch reducer, or does the

2-inch casing extend to the surface?

Answer 1. 2-inch PVC begins at 61' below ground surface with a reducing connection.

Q2. Please confirm the total depth and configuration of the 2-inch PVC casing.

A2. 2-in PVC extends from 61-feet to 361-feet below ground surface.

Q3. At the bridge near 60 feet below ground surface, should the contractor clear or drill through the bridge to place the tremie pipe and grout from 371 feet to 205 feet, followed by overdrilling from 205 feet to 60 feet? Or should the contractor drill to 371 feet and grout the entire borehole?

A3. Break through the bridge and grout by tremie from 371 to 205-feet, followed by overdrilling from 205 up to 60-feet with tremie from 205 to surface.

Q4. May drums containing investigation-derived waste be temporarily staged at the well site until disposal?

A4. Yes.

Q5. Is sampling or laboratory testing of the waste required before disposal?

A5. Standard waste disposal standards for

Maryland applies, this was an observation well for a drinking aquifer.

Q6. Is there a specific waste hauler the contractor must use, or may the contractor select a properly licensed disposal company?

A6. No, the contractor may select a properly licensed disposal company

Q7. What is the technical basis for requiring overdrilling to 60 feet specifically, rather than sealing directly against the existing

2-inch casing over that interval?

Continued...

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

140G0126Q0222/0001

A7. The technical basis for overdrilling the well below 60' is to remove the casing and any hydraulicly conductive material entirely from

60' down to 205' for a complete seal above the clay confining unit. The remaining casing from

60' to land surface is 6" PVC and traditional sealing is requested for this interval.

Q8. Was this depth determined by MDE, the

Talbot County Health Department, or USGS, and is there flexibility to propose an alternative sealing method that achieves the same regulatory objective?

A8. The depth was defined by regulatory objective as detailed above.

For questions, contact Susan Ruggles, sruggles@usgs.gov

Sponsored by GSA FAR (48 CFR) 53.110