W14R0019-0004.pdf

W26GLG40091933

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

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.

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

30-105-04EXCEPTION TO SF 30

APPROVED BY OIRM 11-84

STANDARD FORM 30 (Rev. 10-83) Prescribed by GSA

FAR (48 CFR) 53.243

Amendment 0004 to W91236-14-R-0019 for Environmental Dredging and Dredged Material Handling of dense non-aqueous phase liquid (DNAPL) creosote contaminated sediments at the Atlantic Wood Industries Superfund Site, Portsmouth, Virginia is amended as follow s:

See Schedule on Continuation Page

1. CONTRACT ID CODE PAGE OF PAGES

1 2

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

16C. DATE SIGNED

BY 23-May-2014

16B. UNITED STATES OF AMERICA15C. DATE SIGNED15B. CONTRACTOR/OFFEROR

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

8. NAME AND ADDRESS OF CONTRACTOR (No., Street, County, State and Zip Code) X W91236-14-R-0019

X 9B. DATED (SEE ITEM 11)

21-Apr-2014

10B. DATED (SEE ITEM 13)

9A. AMENDMENT OF SOLICITATION NO.

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

X The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offer is extended, X is not extended.

Offer 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 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

or (c) By separate letter or telegram 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 telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

12. ACCOUNTING AND APPROPRIATION DATA (If required)

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

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

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

CONTRACT ORDER NO. IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, 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)

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

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

10A. MOD. OF CONTRACT/ORDER NO.

2. AMENDMENT/MODIFICATION NO. 5. PROJECT NO.(If applicable)

6. ISSUED BY

3. EFFECTIVE DATE

23-May-2014

CODE

USA ENGINEER DISTRICT, NORFOLK

803 FRONT STREET

NORFOLK VA 23510-1096

W91236 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

W91236-14-R-0019

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

The following items are applicable to this modification:

SCHEDULE

A. DELETE Drawing CN-501 dated February 2014 and REPLACE with Drawing CN-501 dated February 2014 (rev May 2014). Detail 10 has been revised to require an 8” thick layer of coarse sand underneath the stone aggregate. The choking sand to be placed on top of the aggregate has been eliminated. Detail 8, Note 1, changed “impermeable” to “permeable.”

B. DELETE Specification Section 35 31 19 dated February 2014 and REPLACE with Specification Section 35 31 19 dated February 2014 (rev May 2014). Multiple changes, but note that Paragraph 3.3 has been revised to place an 8” thick layer of coarse sand underneath the stone aggregate.

C. The Contracting Office Point-of-Contact is:

Veronica McGuire, Phone: 757-201-7366, Fax: 757-201-7183, Veronica.a.mcguire@usace.army.mil

Atlantic Wood Industries Superfund Site February 2014 (rev May 2014) Dredging and Dredged Material Handling Portsmouth, Virginia

SECTION 35 31 19

SUBAQUEOUS COVERS

PART 1 GENERAL

1.1 DESCRIPTION OF WORK

This section includes requirements for placement of subaqueous covers within the dredging area. Two discrete covers are required; one for potential cover in the dredging area after dredging is complete and one to cover contaminated sediment that is not removed as part of this contract.

1.2 REFERENCES

Not used.

1.3 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for information only. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-01 Preconstruction Submittals

• Subaqueous Covers Work Plan; G.

SD-03 Product Data

• Coarse sand or equivalent; G

• Stone Aggregate; G.

PART 2 PRODUCTS

2.1 COARSE SAND

Coarse sand shall have a D50 >= 1.2 mm and 0 percent passing the No. 200 sieve. The sand shall not contain fine particles that could results in increases in turbidity in the surrounding water column during placement.

2.2 AGGREGATE

Aggregate shall have a D50 >= 7 in. and 0 percent passing the No. 4 sieve.

The aggregate shall be washed stone to limit turbidity produced during placement.

PART 3 EXECUTION

3.1 SUBAQUEOUS COVERS WORK PLAN

The Contractor shall provide a Subaqueous Covers Work Plan to the Contracting Officer, detailing the means and methods, as well as materials and equipment to be utilized as part of subaqueous granular material placement. This plan shall detail locations of respective cover types, sizes and quantities of materials, and any material substitutions the Contractor proposes for the

Section 35 31 19 Page 1

Atlantic Wood Industries Superfund Site February 2014 (rev May 2014) Dredging and Dredged Material Handling Portsmouth, Virginia plan. The plan shall include details of the sediment profile imaging (SPI) survey to be performed, including the qualifications of the SPI surveyor that document experience executing a minimum of 15 previous SPI surveys, SPI survey methodology, and content of the SPI survey report.

3.2 SAND SUBAQUEOUS COVER PLACEMENT

The Contractor shall place coarse sand in locations identified by the Contracting Officer following confirmatory sampling. These locations will include areas that have been dredged into marine clays (to provide a habitat layer) and may include areas with total residual tPAH concentrations greater than 45 ppm and less than 100 ppm (in lieu of additional dredging). The location is expected to include the majority of and possibly all of the dredged area within the Southern Dredging Area and a contiguous portion of the Northern Dredging Area approximately 300 feet from the Southern Dredging Area.

The Contractor shall place sand cover to a minimum thickness of 6 in. across the areas to be covered in accordance with the approved Subaqueous Covers Work Plan. Sand shall be placed by bucket or clamshell lowered through the water column.

3.3 STONE SUBAQUEOUS COVER PLACEMENT

The Contractor shall place aggregate in locations identified by the Contracting Officer during construction. The cover will be placed primarily on dredged surfaces where contaminated sediment is not removed as part of this contract.

The Contractor shall place an 8" thick layer of coarse sand over the in-situ sediment across the area to be covered. The Contractor shall then place aggregate to a minimum thickness of 14 in. over the coarse sand layer.

Aggregate and sand shall be placed by bucket or clamshell lowered through the water column. All work shall be in accordance with the approved Subaqueous Covers Work Plan.

3.4 SURVEYS AND CONFIRMATION

The Contractor, by means of pre-cover placement and post-cover placement multi-beam bathymetric surveys and the approved Survey Control Plan, as specified in Section 35 20 23 DREDGING, shall verify the placement of covers.

Bathymetric surveys shall be performed before and after Sand Subaqueous Cover placement, before and after coarse sand placement for the Stone Subaqueous Cover, and after placement of the aggregate for the Stone Subaqueous Cover.

The Contractor shall perform an SPI survey at a minimum of one location in each sampling grid shown on Drawing CN-103 in the Sand Subaqueous Cover area to demonstrate a minimum of six inches of clean sand cover placement in the placement areas. The Contractor shall perform an SPI survey at a minimum of one location in each sampling grid shown on Drawing CN-103 in the coarse sand layer of the Stone Subaqueous Cover area to demonstrate a minimum of eight inches of clean sand cover in the placement areas. The surveys shall include duplicate images at each location.

-- End of Section --

Section 35 31 19 Page 2