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 13)

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

Amendment No. 0004 30-JUN-2016

U.S ARMY CORPS OF ENGINEERS, OMAHA DISTRICT

CONTRACTING OFFICE

1616 CAPITOL AVE.

OMAHA, NE 68102-4901

See Item 6

W9128F-16-R-0067

23-MAY-2016

4th ID CAB, ATTK BN MAINTENANCE HANGAR

PN 77305, FORT CARSON, COLORADO

See attached documentation for content of the amendment revisions

Date for receipt of Proposals is 21 JUL 2016 at 1400 hours

Government Point of Contact: Denise Cramer (402) 995-2057

30-JUN-2016

Am #0004 - 2 (Continuation SF 30)

DEPARTMENT OF THE ARMY

Omaha District, Corps of Engineers 1616 Capitol Avenue Omaha, Nebraska 68102-4901

:NOTICE: Failure to acknowledge : Solicitation No. W9128F 16 R 0067 :all amendments may cause rejec- :

:tion of the offer. See FAR : Date of Issue: 23 MAY 2016 :52.215-1 of Section 00 21 00 : Date of Receiving Proposals:

21 JUL 2016

Amendment No. 0004

30 JUN 2016

SUBJECT: Amendment No. 0004 to Request for Proposal Solicitation Package for Construction of 4th ID CAB, ATTK BN MAINTENANCE HANGAR, PN 77305, FORT CARSON, COLORADO

Solicitation No. W9128F 16 R 0067

TO: Prospective Offerors and Others Concerned

1. The specifications and drawings for subject project are hereby modified as follows (revise all specification indices, attachment lists, and drawing indices accordingly).

a. Specifications (New and/or Revised and Reissued). Delete and substitute or add specification pages or sections as noted below. The substituted pages or sections are revised and reissued with this amendment.

For convenience, on the revised specification pages (excepting the general wage decision ones), changes have been identified by highlighting. (All portions of reissued specification pages shall apply whether or not changes thereon have been indicated by highlighting.)

Pages or Sections Deleted Pages or Sections Substituted or Added ** ** ** 32 16 15

b. Drawings (Reissued). The following drawings are revised with latest revision date of 1 JUN 2016, and reissued with this amendment.

(1) Sheet FCX7CD114A, SITE DEMOLITION PLAN AREA 114A

(2) Sheet FCX7CG811, ESSAYONS ROAD GRADING PLAN AREA 811

(3) Sheet FCX7CU114, UTILITY PLAN AREA 114

(4) Sheet FCX7CU115, UTILITY PLAN AREA 115

2. This amendment is a part of the proposing papers and its receipt shall be acknowledged on the Standard Form 1442. All other conditions and requirements of the request for proposal remain unchanged. If the proposals have been mailed prior to receiving this amendment, you will notify the office where proposals are received, in the specified manner, immediately of its receipt and of any changes in your proposal occasioned thereby.

a. Hand-Carried Proposals shall be delivered to the U.S. Army Corps of Engineers, Omaha District, Contracting Division, 1616 Capitol Avenue, Omaha, Nebraska 68102-4901.

Am #0004 - 3 (Continuation SF 30)

b. Mailed Proposals shall be addressed as noted in Item 8 on Page 00 10 00-1 of Standard Form 1442.

c. Electronic Mail (Email). ***NOTE: Contrary to what was communicated, by mistake in prior amendments (starting with #2), it is NOT acceptable to provide pricing proposals by Email.

3. Offers will be received until 2:00 p.m., local time at place of receiving proposals, 21 JUL 2016.

Attachments:

Spec Pages listed in 1.a. above Dwgs. listed in 1.b. above (under separate cover)

U.S. Army Corps of Engineers, Omaha District 1616 Capitol Avenue Omaha, Nebraska 68102-4901

30 JUN 2016

jlb/2099

4th ID CAB Attack BN Maintenance Hangar, PN77305 Fort Carson, CO FCX7

SECTION TABLE OF CONTENTS

DIVISION 32 - EXTERIOR IMPROVEMENTS

SECTION 32 16 15

CONCRETE BLOCK PAVEMENTS

04/08

PART 1 GENERAL

1.1 REFERENCES

1.2 SUBMITTALS

PART 2 PRODUCTS

2.1 MATERIALS

2.1.1 Bedding and Jointing Sand

2.1.2 Concrete Paving Block "A" (Paver "A")

2.1.3 Concrete Paving Block "B" (Paver "B")

2.1.4 Concrete Paving Block "C" (Paver "C")

2.1.5 Edge Restraints

2.1.5.1 Cast-in-Place Concrete ([Am_0004] Paver "B" and Paver "C"

[*Am_0004])

2.1.5.2 Concrete Sidewalks ([Am_0004] Paver "A" [*Am_0004])

2.1.6 Graded Stone Aggregate (Paver "B")

2.2 TESTS, INSPECTIONS AND VERIFICATIONS

2.2.1 Paving Block

2.2.1.1 Freezing and Thawing

2.2.1.2 Dimensional Tolerance

2.2.1.3 Retest

2.2.2 Sand

PART 3 EXECUTION

3.1 PREPARATION

3.1.1 Edge Restraint Location

3.1.2 Sand Bedding Layer (Paver "A")

3.1.3 Graded Stone (Paver "B")

3.2 BLOCK PLACEMENT (Paver "A")

3.2.1 Unfilled Gaps

3.2.2 Seating Blocks

3.2.3 Jointing Sand

3.2.4 Timing of Operations

3.2.5 Final Rolling

3.2.6 Construction Traffic

3.3 BLOCK PLACEMENT (Paver "B")

3.3.1 Unfilled Gaps

3.4 CLEANUP

3.5 SMOOTHNESS AND GRADE TOLERANCES

3.5.1 Smoothness

3.5.2 Block Height

3.5.3 Grade

3.5.4 Remedial Action

SECTION 32 16 15 Page 1 Am_0004

-- End of Section Table of Contents --

SECTION 32 16 15 Page 2

SECTION 32 16 15

CONCRETE BLOCK PAVEMENTS

04/08

PART 1 GENERAL

1.1 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.

AMERICAN CONCRETE INSTITUTE INTERNATIONAL (ACI)

ACI 301 (2010; Errata 2011) Specifications for Structural Concrete

ASTM INTERNATIONAL (ASTM)

ASTM C 117 (2004) Standard Test Method for Materials Finer than 75-um (No. 200) Sieve in Mineral Aggregates by Washing

ASTM C 131 (2006)Standard Test Method for Resistance to Degradation of Small-Size Coarse Aggregate by Abrasion and Impact in the Los Angeles Machine

ASTM C 136 (2006) Standard Test Method for Sieve Analysis of Fine and Coarse Aggregates

ASTM C 67 (2009) Standard Test Methods for Sampling and Testing Brick and Structural Clay Tile

ASTM C 936/C 936M (2009) Standard Specification for Solid Concrete Interlocking Paving Units

ASTM C 979 (2005) Pigments for Integrally Colored Concrete

ASTM D 4318 (2005) Liquid Limit, Plastic Limit, and Plasticity Index of Soils

ASTM D 75/D 75M (2009) Standard Practice for Sampling Aggregates

ASTM E 11 (2009) Wire Cloth and Sieves for Testing Purposes

1.2 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

SECTION 32 16 15 Page 3 accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-04 Samples

Concrete Paving Block; G, DO

A sample of five paving blocks of each type prior to the start of the work. Also, a representative sample of not less than 15 blocks as directed by the Contracting Officer, from each lot of 20,000 concrete paving blocks or fraction thereof.

SD-06 Test Reports

Tests, Inspections and Verifications

A written report within 7 calendar days after completion of the work, covering the testing required for each lot.

PART 2 PRODUCTS

2.1 MATERIALS

2.1.1 Bedding and Jointing Sand

Use two separate sand gradations for the bedding layer and in the block joints where indicated on the drawings. Both sand gradations shall consist of crushed sand, natural sand, or a combination of crushed and natural sand. Both sand gradations shall have a minimum L.A. Abrasion of 40 percent when tested in accordance with ASTM C 131. Both sand gradations shall be nonplastic when tested in accordance with ASTM D 4318 and shall be free of lumps, clay, vegetation, soft particles, sulphates, and other contaminants. The bedding and jointing sands shall conform to the following gradations, determined in accordance with ASTM C 136 and ASTM C 117, using ASTM E 11sieve.

Percent Passing Sieve Bedding Sand Jointing Sand

(ASTM E 11)

3/8 in. 100 100 No. 4 80-100 100 No. 8 60-90 95-100 No. 16 25-70 70-100 No. 30 10-35 40-75 No. 50 5-20 10-40 No. 100 0-10 2-25 No. 200 0-5 0-10

2.1.2 Concrete Paving Block "A" (Paver "A")

The concrete paving block Truncated Dome Unit Paver (Truncated Dome Unit Paver)shall conform to ASTM C 936/C 936M, and as noted on the drawings, and shall be 2-3/8 inch thick, reddish (terra cotta) brick in color, and rectangular in shape with truncated domes as indicated on the drawings.

Pavers shall have integral nodules of 1/8 inch on all sides to assure a uniform joint spacing of 1/8 inch. Pigmentation shall conform to ASTM C 979 and color shall have a minimum of a 70 percent light reflexivity contrast

SECTION 32 16 15 Page 4 with adjacent paving.

2.1.3 Concrete Paving Block "B" (Paver "B")

The concrete paving block Permeable Paver (Permeable Paver)shall conform to ASTM C 936/C 936M and as noted on the drawings, and shall be 3" thick natural finish, rectangular shape as indicated on the drawings, [Am_0004] and be a creme color. Pavers shall have integral spacer nodules of 1/4" on all sides to assume a uniform joint spacing of 1/4". Pigment shall conform to ASTM C 979. [*Am_0004]

[Am_0004]

2.1.4 Concrete Paving Block "C" (Paver "C")

The concrete paving block Permeable Paver (Permeable Paver)shall conform to ASTM C 936/C 936M and as noted on the drawings, and shall be 3" thick natural finish, rectangular shape as indicated on the drawings, and be a brown color. Pavers shall have integral spacer nodules of 1/4" on all sides to assume a uniform joint spacing of 1/4". Pigment shall conform to

ASTM C 979.

[*Am_0004]

2.1.5 Edge Restraints

2.1.5.1 Cast-in-Place Concrete ([Am_0004] Paver "B" and Paver "C" [*Am_0004]

The edge restraint shall be portland cement concrete placed with the dimensions shown in the plans. Concrete shall conform to the requirements of ACI 301, except that it shall have a compressive strength of not less than 4,000 psi at 28 days.

2.1.5.2 Concrete Sidewalks ([Am_0004] Paver "A" [*Am_0004])

As specified and as indicated on the drawings.

2.1.6 Graded Stone Aggregate (Paver "B")

As specified on the drawings.

2.2 TESTS, INSPECTIONS AND VERIFICATIONS

2.2.1 Paving Block

Conduct the tests prescribed by ASTM C 936/C 936M and the following tests on the remaining 13 blocks of each sample from each lot.

2.2.1.1 Freezing and Thawing

Determine resistance to freezing and thawing in accordance with Section 8 of ASTM C 67 for five blocks. The blocks shall have no breakage and no more than 1.0 percent loss of any individual unit in dry weight when subjected to 50 cycles of freezing and thawing.

2.2.1.2 Dimensional Tolerance

The length and width of each block in the sample shall not vary from any other block in this or any other lot sample by more than 1/8 inch.

SECTION 32 16 15 Page 5

Thickness of any block in the sample shall not vary by more than 1/8 inch from the specified block thickness.

2.2.1.3 Retest

Notify the Contracting Officer if any blocks fail to meet the specified requirements. In case the shipment fails to conform to the specified requirements, the Contractor may sort it, and new specimens selected from the retained lot for retesting, as directed by the Contracting Officer.

All concrete paving block retests shall be performed at the expense of the Contractor. In case the second set of specimens fail to conform to the test requirements, the entire lot shall be rejected.

2.2.2 Sand

Obtain a representative sample in accordance with ASTM D 75/D 75M from each 100 cubic yard of sand to be used in the project. If the sand fails to meet the gradation requirements the Contractor may take another sample and retest it at no cost to the Government. If this retest fails or if no second test is taken, the sand is rejected by the Government and shall be removed from the job site.

PART 3 EXECUTION

3.1 PREPARATION

3.1.1 Edge Restraint Location

Install the edge restraint as shown in the drawings prior to placement of the blocks.

3.1.2 Sand Bedding Layer (Paver "A")

The bedding sand where indicated shall be spread evenly over the area to be paved and shall be screeded to an uncompacted average thickness of 1-3/4 inch with a tolerance for grade and surface smoothness of plus or minus 1/4 inches. This bedding sand shall not be used to fill low areas that exceed the specified tolerance for the base. The sand shall be left uncompacted and shall not be disturbed by any pedestrian or vehicle construction traffic.

3.1.3 Graded Stone (Paver "B")

The graded stone shall be placed as indicated on the drawings and in accordance with paver "B" manufacturer's written installation instructions. Contractor shall verfiy dimensions are in accordance with the drawings, subgrade will have positive drainage to subdrain, and subdrain, and lay subdrain pipe prior to installing graded stone.

3.2 BLOCK PLACEMENT (Paver "A")

The paving block shall be placed by hand or machine in the indicated pattern. Placement of paving block shall start from a corner or straight edge and proceed forward over the undisturbed sand bedding layer. The joints, excluding any chamfer between paving blocks, shall be not less than 1/16 inch or more than 1/4 inch in width. After seating, the block surface shall be up to 1/4 inch above the edge restraint.

SECTION 32 16 15 Page 6

3.2.1 Unfilled Gaps

Any gaps between paving blocks and any edge restraint, drainage structures, or other members that cannot be filled with a whole block shall be filled with a paving block cut to fit the gap, except that slivers will not be allowed and the minimum size of cut block shall be 4 inch width (nominal) by 2 inch length. Cutting shall be done with a masonry saw, or other device that accurately leaves a clean, vertical face without spalling.

Cutting shall be done to reduce length only and to conform with curves where indicated on the drawings. The concrete edge restraint shall be sized accurately to allow the nominal width of the blocks to fit within tolerances specified.Any remaining gap between the block and adjoining edge restraint or structure greater than 1/8 inch will not be accepted; adjacent blocks shall be cut or rearranged to prevent this.

3.2.2 Seating Blocks

The blocks shall be seated in the bedding sand by compacting them with a minimum of three passes of a vibratory plate compactor.

3.2.3 Jointing Sand

The jointing sand shall be swept into joints and vibrated with a vibratory plate or vibratory roller compactor. This process shall be continued until sweeping and vibrating have filled all joints with sandand further vibration cannot force additional sand into the joints. The coarser particles of the sand will not enter the joints and will remain on the surface. These particles and any excess sand shall be swept off the pavement.

3.2.4 Timing of Operations

Seating of blocks and placement of jointing sand can be done concurrently with block placement. However, seating of blocks and placement of jointing sand shall not be done within 5 feet of any unfinished edge of the block pavement that is not supported by the edge restraint.

3.2.5 Final Rolling

The final finished paving block surface shall be rolled with four passes of a vibratory or pneumatic roller with a static weight of not less than 10,000 pounds.

3.2.6 Construction Traffic

Construction traffic shall not be allowed on the paving block surface until the jointing sand has been placed and vibrated into the joints and all debris and excess sand has been swept off.

3.3 BLOCK PLACEMENT (Paver "B")

Blocks shall be placed in patterns as indicated on the drawings.

Installation shall be in accordance with manufacturers written instructions.

3.3.1 Unfilled Gaps

Any gaps between paving blocks and any edge restraint, drainage structures, or other members that cannot be filled with a whole block shall be filled with a paving block cut to fit the gap, except that slivers will not be

SECTION 32 16 15 Page 7 allowed and the minimum size of cut block shall be 4 inch width (nominal) by 2 inch length. Cutting shall be done with a masonry saw, or other device that accurately leaves a clean, vertical face without spalling.

Cutting shall be done to reduce length only and to conform with curves where indicated on the drawings. The concrete edge restraint shall be sized accurately to allow the nominal width of the blocks to fit within tolerances specified.Any remaining gap between the block and adjoining edge restraint or structure greater than 1/4 inch will not be accepted; adjacent blocks shall be cut or rearranged to prevent this.

3.4 CLEANUP

Sweep the entire pavement surface and remove all excess sand, blocks and debris from the project area.

3.5 SMOOTHNESS AND GRADE TOLERANCES

3.5.1 Smoothness

No portion of the finished pavement surface shall deviate by more than 3/8 inch from a 10 foot long metal straightedge placed on the pavement surface.

3.5.2 Block Height

The finished main surface of the blocks (excluding the truncated domes)shall be either flush with adjacent pavement,or up to 1/4 inch higher than all edge restraints or drainage structures.

3.5.3 Grade

The finished pavement shall be within 0.04 feet of planned grade shown on the plans.

3.5.4 Remedial Action

Any area not meeting the smoothness, block height, or grade tolerance shall be taken up, adjustments made, and the blocks relaid.

-- End of Section --

SECTION 32 16 15 Page 8