AM_0004.pdf

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

1. CONTRACT ID CODE

2. AMENDMENT/MODIFICAITON NO. 3. EFFECTIVE DATE 4. REQUISITION/PURCHASE REQ. NO. 5. PROJECT NO. (If applicble)

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

STANDARD FORM 30 (REV. 10-83)

Prescribed by GSA FAR (48 CFR) 53.243

FACILITY CODE

9A. AMENDMENT OF SOLICIATION NO.

9B. DATED (SEE ITEM 11)

10A. MODIFICATION OF CONTRACT/ORDER NO.

10B. DATED (SEE ITEM 11)

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

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

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 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 your 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 APPROPIRATION DATA (If required)

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

IT MODIFIES THE CONTRACT/ORDER NO. 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

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.

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 OF PAGES

6. ISSUED BY CODE

8. NAME AND ADDRESS OF CONTRACTOR (No., 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)

NSN 7540-01-152-8070

Previous edition unusable

1 2

0004 10/09/12

W912EE

Contracting Division USACE-Vicksburg District 4155 Clay Street Vicksburg, MS 39183

See Item 6

✘ NOV05B-11-H-0009

09/20/12

Reference Request for Proposal No. NOV04B-11-H-0008, for New Orleans to Venice, NOV-05B, St.

Jude to City Price, Fronting Protection at Diamond Pump Station, Plaquemines Parish, Louisiana.

SEE CONTINUATION PAGE FOR SUMMARY OF CHANGES

10/09/12

NOV05B-11-H-0009

SF30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

SPECIFICATIONS:

Section 31 07 00 is revised and replaced.

Specifications revised by this amendment have the notation "Revised by Amendment 0004" at the bottom of the page. Text added by this amendment is shown as underlined. Text deleted by this amendment is shown as overstruck.

Request for Proposal No. NOV05B-11-H-0009 is hereby amended toaddress Request For Information (RFI) #30 and #31.

ALL OTHER TERMS AND CONDITIONS REMAIN UNCHANGED.

(End of Summary of Changes)

Request For Information (RFI)

Q30. Wick Drain specification 31 07 00item 2.1.1 table 1 specifies a discharge capacity of 20 gpm/ft of width at hydraulic gradient of 1.0. In this case with a diameter of 4 inches a 6.6 gpm/ft @hydraulic gradient of 1.0 is being required. The norm gpm/ft is approximately 2.5 gpm/ft @hydraulic gradient of 1.0. please advise if the norm will be acceptable ?

A30. See spec section 31 07 00 per amendment 0004.

Q31. Vertical Wick Drain specification 31 07 00, section 2.1.1 lists a discharge flow rate well in excess of any vertical wick drains. The discharge requirement (20 gallons per minute per foot of width, at a gradient of 0.1 and confining pressure of 10 psi) would result in flow of 6.66 gallons per minute for a 4” wide wick drain.

This is common wording for a horizontal strip drain specification (6 or 12 inch wide by 1 inch thick material, as opposed to 4” wide by ¼ inch thick material). There are no commercially/commonly manufactured wick drain materials that would be able to meet this specification. Typical flow rates for our ‘economical’ drain is the range of 1.7 gallons per minute at this pressure, 2.3 gallons per minute for our ‘high performance’ drain.

Please provide clarification on the material specifications.

A31. See spec section 31 07 00 per amendment 0004.

SECTION 31 07 00

VERTICAL WICK DRAINS

PART 1 GENERAL

1.1 SCOPE

The work covered by this section consists of furnishing all plant, labor, equipment, and materials, and performing all operations necessary for installing vertical wick drains as indicated in the drawings and as specified herein. The vertical wick drains shall be installed by a Contractor or subcontractor experienced in vertical wick drain installation.

1.2 MEASUREMENT

Vertical wick drains will be measured by the linear foot. The length of vertical wick drains to be paid for will be the length satisfactorily installed, including the required length of wick drain material protruding above the working surface, complete and in place. Vertical wick drains placed in excess of design lengths shown in the plans will be at no additional pay.

1.3 PAYMENT

Payment will be made at the contract unit price per linear foot for "Vertical Wick Drains". Price and payment shall constitute full compensation for furnishing all plant, labor, material and equipment and performing all operations for installing vertical wick drains as indicated in the drawings.

1.4 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

ASTM INTERNATIONAL (ASTM)

ASTM D 1621 (2010) Compressive Properties of Rigid Cellular Plastics

ASTM D 1876 (2008) Standard Test Method for Peel Resistance of Adhesives (T-Peel Test)

ASTM D 3776/D 3776M (2009; E 2011) Standard Test Method for Mass Per Unit Area (Weight) of Fabric

ASTM D 3786/D 3786M (2009) Hydraulic Bursting Strength of Textile Fabrics-Diaphragm Bursting Strength Tester Method

ASTM D 4355 (2007) Deterioration of Geotextiles from Exposure to Light, Moisture and Heat in a

Revised by Amendment 0004

Xenon-Arc Type Apparatus

ASTM D 4491 (1999a; R 2009) Water Permeability of Geotextiles by Permittivity

ASTM D 4533 (2011) Trapezoid Tearing Strength of Geotextiles

ASTM D 4632 (2008) Grab Breaking Load and Elongation of Geotextiles

ASTM D 4716 (2008) Determining the (In-Plane) Flow Rate Per Unit Width and Hydraulic Transmissivity of a Geosynthetic Using a Constant Head

ASTM D 4751 (2004) Determining Apparent Opening Size of a Geotextile

ASTM D 4833 (2007) Index Puncture Resistance of Geotextiles, Geomembranes, and Related Products

ASTM G 21 (2009) Determining Resistance of Synthetic Polymeric Materials to Fungi

1.5 SUBMITTALS

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

submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-03 Product Data

Sequence and Method of Installation; G

The Contractor shall submit to the contracting officer, for review and approval, details of the sequence and method of installation.

The submittal shall at a minimum contain the following specific information:

a. Size, type, weight, maximum pushing force, and configuration of the installation rig

b. Dimensions and length of mandrel

c. Detailed description of proposed installation procedures including details of sequence and method of installation

d. Proposed methods for overcoming obstructions

e. Proposed methods for splicing drains

f. Proposed methods for stapling (nailing) the wick or the strip drain

g. Proposed backfill procedure

Vertical Wick Drains; G

SD-04 Samples

Quality Assurance Samples and Tests; G

The Contractor shall submit a 3ft sample of the vertical wick drain material stamped or labeled by the manufacturer as being representative of the drain material having the specified trade name. At least 30 days prior to installation, The Contractor shall furnish to the Contracting Officer, in duplicate a mill certificate or affidavit signed by a legally authorized official from the company manufacturing the vertical wick drains. The certificate shall contain the signer's title, the name and address of the Contractor, the contract number, and the project name and location. Approval of the sample material by the contracting officer shall be required prior to site delivery of the vertical wick drain material.

SD-06 Test Reports

Daily Checklists

The Contractor shall supply to the COR, by the morning following each work day, daily checklists containing a summary of wick drains installed.

SD-07 Certificates; G

Completion and Performance

Proof of successful completion and performance on a similar vertical wick drain installation project shall be supplied to the Contracting Officer at least fourteen (14) days prior to installation.

1.5.1 Completion and Performance

Proof of successful completion and performanceon a similar vertical wick drain installation project shall be supplied to the Contracting Officer at least fourteen (14) days prior to installation.

1.5.2 Quality Assurance Samples and Tests

The Contractor shall submit a 3ft sample of the vertical wick drain material stamped or labeled by the manufacturer as being representative of the drain material having the specified trade name. At least 30 days prior to installation, The Contractor shall furnish to the Contracting Officer, in duplicate a mill certificate or affidavit signed by a legally authorized official from the company manufacturing the vertical wick drains. The certificate shall contain the signer's title, the name and address of the Contractor, the contract number, and the project name and location.

Approval of the sample material by the contracting officer shall be required prior to site delivery of the vertical wick drain material.

1.5.3 Details of Sequence and Method

The Contractor shall submit to the contracting officer, for review and approval, details of the sequence and method of installation. The submittal shall at a minimum contain the following specific information:

1) Size, type, weight, maximum pushing force, and configuration of the installation rig

2) Dimensions and length of mandrel

3) Detailed description of proposed installation procedures including details of sequence and method of installation

4) Proposed methods for overcoming obstructions

5) Proposed methods for splicing drains

6) Proposed methods for stapling (nailing) the wick or the strip drain

7) Proposed backfill procedure

1.6 QUALITY CONTROL

The Contractor shall establish and maintain quality control for vertical wick drain installation to assure compliance with contract requirements, and maintain records of his/her quality controls for all construction operations including but not limited to the following:

a. Location and depth of vertical wick drain installation.

b. Location of and connection details of the drains.

PART 2 PRODUCTS

2.1 MATERIALS

2.1.1 Vertical Wick Drains

The vertical wick drain shall be two-part prefabricated geocomposite soil drain consisting of a formed polypropylene core covered with a non-woven polypropylene filter fabric. The wick drain allows free passage of pore water without loss of soil material or piping. The perimeter of the drain shall not be less than 7.50 inches. The drains shall be free of defects, rips, holes or flaws. The drain shall have the following minimum properties:

TABLE 1

PROPERTY UNITS ACCEPTABLE

VALUES

TEST METHOD

DRAIN

WIDTH INCHES 4.0

TENSILE STRENGTH LBS/FT^2 400 ASTM D 1621

TABLE 1

SHEAR STRENGTH LBS/FT^2 400 ASTM D 1621 (MOD)

FUNGUS

RESISTANCE

no growth ASTM G 21

DISCHARGE

CAPACITY

(IN-PLANE FLOW)

GPM/FT 4.820 GPM/FT of width at hydraulic gradient of 0.1 FT/FT and confining pressure of 10

PSI

ASTM D 4716

FABRIC

WEIGHT OZ/YD^2 4.0 ASTM D 3776/D 3776M

GRAB TENSILE

STRENGTH

LBS 130 ASTM D 4632

ELONGATION

AT BREAK

PERCENT >60 ASTM D 4632

TRAPEZOIDAL TEAR LBS 70 ASTM D 4533

PUNCTURE

STRENGTH

LBS 50 ASTM D 4833

MULLEN BURST PSI 150 ASTM D 3786/D 3786M

FLOW RATE GPM/FT^2 80 ASTM D 4491

PERMEABILITY IN/SEC 0.016 ASTM D 4491

AOS SIEVE 80 ASTM D 4751

2.1.2 Suppliers

Suppliers of vertical wick drain materials may include the following or others approved in writing by the contracting officer.

Colbond Geosynthetics (AKZO Nobel Geosynthetics Company) Sand Hill Road P. O. Box 1057 Enka, NC 28728 Toll Free: 800-365-7391 Phone: (828) 665-5050 Fax: (828) 665-5009

HB Wick Drains (formerly Nilex Construction) 14736 E. Easter Ave.

Centennial, CO 80112 Phone: (303) 627-1100 Fax: (303) 951-5800

Amerdrain American Wick Drain Co.

1209 Airport Road

Monroe, NC 28110 Phone: 1-800-242-WICK (9425) Fax: (704) 238-9200

US Wick Drain, Inc.

8869 King Road P. O. Box 919 Leland, NC 28451 Phone: (910) 371-1899 Fax: (910) 371-3290

2.1.3 Submittals

Not less than two weeks prior to installation of the wick drains, the Contractor shall submit to the Contracting Officer for approval the manufacturer's literature, samples of the vertical wick drain that will be installed, and written material specifications. The samples shall be stamped or labeled by the manufacturer as being representative of the drains having the specified trade name. Approval of the sample materials by the Contracting Officer shall be required prior to delivery of the production wick drain materials. A manufacturer material certification shall be provided for all vertical wick drain materials delivered to the project.

2.1.4 Shipment and Storage

During shipment and storage, the drain materials shall be wrapped in a heavy-duty protective covering. The storage area shall be such that the drain material is protected from mud, dirt, dust, debris and detrimental substances. Drain materials shall be stockpiled and stored in a manner that will protect the material from damage. The drains shall be free of defects, rips, holes, or flaws. Damaged materials shall be replaced at the Contractor's expense.

PART 3 EXECUTION

3.1 VERTICAL WICK DRAIN INSTALLATION

Vertical wick drains shall be installed subsequent to the construction of the sand fill working pad. Vertical wick drains must be installed according to manufacturer's specifications. The Contractor may use augering or other methods to loosen the working pad prior to installation of the vertical wick drains. Vertical wick drains shall be installed with approved equipment, which will cause minimum disturbance of the subsoil during installation.

The Contractor shall locate vertical wick drains in the field and mark such locations on the ground. The location of the vertical wick drains shall not vary by more than 6 inches from the locations shown on the plans or as directed by the contracting officer. The vertical tolerance shall not be more than 0.25 inch per foot from vertical. Vertical wick drains shall be installed from the working surface to the depth shown in the plans or as designated by the Contracting Officer. Vertical wicks that are out of their proper locations, damaged in construction, or are improperly installed will be rejected. Rejected vertical wick may be removed or abandoned in place, at the Contractor's option. Replacement drains shall be located within 18 inches of the rejected drain. All rejected drains will be replaced at the

Contractor's expense.

The Contracting Officer will provide the Contractor with a drawing showing the perimeter area of the wick drain installation. At least two weeks prior to installation of the wick drains, the Contractor shall submit to the Contracting Officer for review and approval, details of the sequence and method of installation. As a minimum, the submittal shall contain the following specific information:

a. Size, type weight, maximum pushing force and configuration of the installation rig.

b. Dimension and length of mandrel.

c. Details of wick drain anchorage.

d. Detailed description of proposed installation procedures.

e. Proposed method(s) for overcoming obstructions.

f. Proposed method(s) for splicing wick drains.

3.1.1 Approval by the Contracting Officer

Approval by the Contracting Officer will not relieve the Contractor of the responsibility to install wick drains in accordance with the plans and specifications. If, at any time, the Contracting Officer considers that the method of installation does not produce a satisfactory wick drain, the Contractor shall alter his method and/or equipment as necessary to comply with the Plans and Specifications.

3.1.2 Prior to Installation

Prior to the installation of wick drains within the designated areas, the Contractor shall demonstrate that the proposed equipment, method and materials produce a satisfactory installation in accordance with these specifications. For this purpose, the Contractor may be required to install trial wick drains at locations designated by the Contracting Officer.

Payment for satisfactory trial wick drains will be at the bid price per drainage wick, installed. Payment will not be made for installing unsatisfactory trial wick drains.

In addition, the Contractor shall stake out (flag) the proposed locations of the wick drains and then take all necessary precautions to preserve the stakes. The locations of the stakes (or flagging) shall not vary more than six (6) inches from the locations indicated on the drawings or as directed by the Contracting Officer.

3.1.3 Wick Drains

Wick drains that deviate from the plan location by more than six (6) inches, or are damaged, or are improperly installed, will be rejected and no compensation will be allowed for any materials furnished or for any work performed on such wick drains. Replacement wick drains shall be offset as directed by the Contracting Officer from the location of the rejected wick drains.

3.1.4 Verification of Plumbness and Depth

The wick drains shall be installed vertically to the depth specified on the Drawings. The Contractor shall provide the Contracting Officer with a suitable means of verifying the plumbness of the mandrel and determining the depth of the wick drain at any time. The equipment shall be carefully checked for plumbness and shall not deviate more than 0.25 inches per foot from the vertical.

3.1.5 Splices or Connections

Splices or connections in the wick drain material shall be done in a workmanlike manner so as to insure continuity and flow through the wick drain material. The splice or connection technique must be approved by the Contracting Officer. The wick drains shall be installed in such a sequence that construction equipment will not disturb any previously placed wick drains. Splicing of the vertical wick drains shall be done so as to insure structural and hydraulic continuity of the vertical wick drain material. No more than one splice per drain will be allowed.

3.1.6 Obstructions

Where obstructions or stiff soils are present that prevent the installation of wick drains, the Contractor will make two attempts to install a wick drain within 18 inches of the original location. If a drain can still not be installed, the location will be marked and designated for pre-augering/pre-drilling. Pre-augering/pre-drilling may be required through the sand working pad. Deeper pre-augering/pre-drilling must be approved by the Contracting Officer.

3.1.7 Wick Drains from Working Surface

Wick drains shall be installed from the working surface to the specified depth, or to such a depth either shallower or deeper than plan depth, where the soil resists a reasonable effort at further penetration. The Contracting Officer may vary the depths, spacing, or the number of wick drains to be installed, and may revise the plan limits for this work as necessary. If the previously listed changes are substantial enough to become a material change to the wick Drain Contractor's contract, as determined by the Contracting Officer, the contract unit price for appropriate bid item(s) listed in paragraph 1.3 may be adjusted.

3.1.8 Contractor

The Contractor shall provide the Contracting Officer with suitable means of making a linear determination of the depth of wick drain installed at each wick drain location and a linear determination of the depth of pre-auger/pre-drill holes, if pre-auger/pre-drill holes are required.

3.1.9 Wick Drain Material

The wick drain material shall be cut neatly at its upper end. There shall be a four (4) inch to eight (8) inch length of wick drain material protruding above the surface at each wick drain location.

3.1.10 Equipment

Wick drain installation shall be performed by a Contractor experienced in this type of work. The wick drains shall be installed with equipment which will cause a minimum of disturbance of the subsoil during the installation.

The wick drains shall be installed with a sleeve or mandrel that will be advanced to the required elevation using constant load, or constant rate of advancement methods. The use of falling weight impact hammers and jetting shall not be permitted for installation of the wick drains. Vibratory techniques may be used to penetrate the sand working pad, but may not be used to penetrate the underlying soft materials. The mandrel shall protect the wick drain material from tears, cuts and abrasions during installation and shall be withdrawn after the installation of the drain. The mandrel shall be of sufficient cross-section area so that it will maintain the integrity of the vertical wick such as avoiding crushing or distorting the shape of the vertical wick. The mandrel shall have a maximum cross-sectional area of 10 square inches. The drain shall be provided with an "anchor" plate or rod at the bottom to anchor the bottom of the drain at the required depth at the time of mandrel removal. The cross sectional area of the mandrel and anchor combination shall not be greater than ten (10) square inches. The wick drain installation unit shall be capable of applying a minimum force of 30,000 lbs.

3.1.11 Daily Checklists

The Contractor shall supply to the COR, by the morning following each work day, daily checklists containing a summary of wick drains installed. The summary shall include drain type, surveyed locations, and length to nearest one foot, quantity of wick drain installed at that location, the locations of any wick drains that do not extend to the plan elevation, and the locations and depths where vibration or predrilling was used to install the wick drain. Obtaining surveyed locations of the wick drains is critical so that instrumentation and borings do not intersect the wick drains.

3.2 Vertical Wick Drain Removal

Vertical wick drains within the preload removal limits may remain in place after the preload period. The Contractor shall remove any wick drains at the direction of the COR.

3.3 Strength Gain Verification Program

The Government will conduct a strength gain verification program consisting of soil test borings and cone penetrometer tests in order to verify strength of foundation soils. The borings will be performed approximately 3 months after the preload embankment construction and again near the end of the preload period. Contractor shall provide access to the boring and cone penetrometer test locations. The surveyed locations of the wick drains will be used to lay out the boring and cone penetrometer test locations so as not to intersect the wick drains.