R17PS00266_Amendmend_0004_(1).pdf

(x)

R17PS00266

x x 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 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 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.

x

Billings MT 59101

R60

GP-5000

2021 4th Ave. N.

Great Plains Regional Office Bureau of Reclamation

04/28/20170004

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

03/27/2017

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 date, 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.

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)

Paris Everson

STANDARD FORM 30 (REV. 10-83)

Prescribed by GSA

FAR (48 CFR) 53.243

NSN 7540-01-152-8070

Previous edition unusable

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

Shoshone Powerplant Roof Replacement, Buffalo Bill Dam Modifications, Pick-Sloan Missouri Basin Program, Wyoming.

See Page 2 for changes incorporated in this amendment.

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 .

Shoshone Powerplant Roof Replacement Amendment No. 0004 Buffalo Bill Dam Modifications Pick-Sloan Missouri Basin Program, Wyoming Page 2 of 2

LIST OF CHANGES:

1. Due to the ambiguity with warranty in Section 07 53 23 - Ethylene Propylene Diene Monomer (EPDM) Roof Membrane System, the government hereby revises this requirement.

a. Change Amendment 0002, Section 07 53 23 - Ethylene Propylene Diene Monomer (EPDM) Roof Membrane System.

i. Remove Section 07 53 23 - Ethylene Propylene Diene Monomer (EPDM) Roof Membrane System, Amendment 002 in its entirety.

ii. Insert attachment: Revised Section 07 53 23 - Ethylene Propylene Diene Monomer (EPDM) Roof Membrane System, Amendment 004 in its entirety.

Shoshone Powerplant Amendment No. 004 Roof Replacement, Wyoming Specification No. 60-C0641

Ethylene Propylene Diene Monomer (EPDM) Roof Membrane System Revised 07 53 23 - 1

SECTION 07 53 23

ETHYLENE PROPYLENE DIENE MONOMER (EPDM) ROOF MEMBRANE SYSTEM

PART 1 GENERAL

1.01 MEASUREMENT AND PAYMENT

A. Prepare, Furnish and Install Roof Membrane System:

1. Measurement: Area of roof on which roof membrane system is applied.

2. Payment: Square foot price offered in Price Schedule.

3. Includes, but is not limited to, preparing existing concrete roof deck surface, furnishing and installation of all Roofing System components specified in this section and represented in Section 52 00 00 – Drawings, Drawing No’s. 1458- 600-60000 and 1458-600-60002, with exception of EPS Geofoam (Section 31 23 23).

B. Provide 20 Year Manufacturer’s Warranty

1.02 SUMMARY

A. Reference Section 52 00 00 – Drawings, Drawing No.’s 26-E-140 and 26-E-141 for general dimensional information of roof. Field verify existing conditions. Existing concrete roof deck documents indicate roof slopes as represented in Section 52 00 00 – Drawings, Drawing No. 1458-600-60000, Roof Plan – Replacement.

1.03 REFERENCE STANDARDS

A. ASTM International (ASTM)

1. ASTM E 108 Standard Test Methods for Fire Tests of Roof Coverings

2. ASTM D7877 – 14 Electronic Methods for Detecting and Locating Leaks in Waterproof Membranes

3. ASTM C 208 Standard Specification for Cellulosic Fiber Insulating Board

4. ASTM D 412 Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers-Tension

5. ASTM D 624 Standard Test Method for Tear Strength of Conventional Vulcanized Rubber and Thermoplastic Elastomers

6. ASTM A 653/A 653M Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated by the Hot- Dip Process

Ethylene Propylene Diene Monomer (EPDM) Roof Membrane System Revised 07 53 23 - 2

7. ASTM C 665 Standard Specification for Mineral-Fiber Blanket Thermal insulation for Light Frame Construction and Manufactured Housing

8. ASTM C 755 Standard Practice for Selection of Water Vapor Retarders for Thermal Insulation

9. ASTM D 816 Standard Test Methods for Rubber Cements

10. ASTM C 1289 Standard Specification for Faced Rigid Board Cellular Polyisocyanurate Thermal Insulation

11. ASTM D 2000 Standard Classification System for Rubber Products in Automotive Applications

12. ASTM D 3786 Standard Test Method for Bursting Strength of Textile Fabrics – Diaphragm Bursting Strength Tester Method

13. ASTM D 4491 Standard Test Methods for Water Permeability of Geotextiles by Permittivity

14. ASTM D 4533 Standard Test Method for Trapezoidal Tearing Strength of Geotextiles

15. ASTM D 4632 Standard Test Method for Grab Breaking Load Elongation of Textiles

16. ASTM D 4637 Standard Specification for EPDM Sheet Used In Single-Ply Roof Membrane

17. ASTM D 4833 Standard Test Method for Index Puncture Resistance of Geomembranes and Related Products

18. ASTM D 5019 Standard Specification for Reinforced Non- Vulcanized Polymeric Sheet Used inRoofing Membrane

19. ASTM D 5261 Standard Test Method for Measuring Mass per Unit Area of Geotextiles

B. National Fire Protection Association:

1. NFPA 255 Standard Method of Test of Surface Burning Characteristics of Building Materials.

C. National Roofing Contractors Association:

1. NRCA - The NRCA Roofing and Waterproofing Manual.

2. NRCA - The NRCA Low-Slope Membrane Roofing Design Guidelines

D. Underwriter Laboratories (UL)

1. UL 790 Standard Tests Methods for Fire Tests of Roof Coverings

Revised 07 53 23 - 3

2. UL 1256 Fire Test of Roof Deck Constructions

E. American Wood Products Association (AWPA)

1.04 SUBMITTALS

A. Submit the following in accordance with Section 01 33 00 - Submittals.

B. RSN 07 53 23-1, Shop Drawings:

1. Indicate roof membrane layout, dimensions, and spacing’s; parapet, cliff interface and transition details.

2. Indicate EPDM membrane layout with joint and termination flashing, closure, trim, anchor and penetration details.

3. Represent anchor spacing’s; sealant locations; and other fabrication / installation details.

4. Document As-Built concrete roof deck slopes, valley locations and ridge location;

after all existing roof materials have been removed.

C. RSN 07 53 23-2, Product Data:

1. Manufacturer’s product data for approval.

2. Submit data indicating compliance with Part 2 – Products of this Section, including recycled contents of products for approval.

D. RSN 07 53 23-3, Manufacturer’s Installation Instructions:

1. Submit Manufacturer’s environmental considerations, storage requirements, handling and installation instructions.

2. Submit instructions for special procedures, joint conditions and termination conditions.

E. RSN 07 53 23-4, Manufacturer’s Certification:

1. Submit certification that products meet or exceed specified requirements.

2. Written evidence of installer’s qualifications.

3. Include signed statement from manufacturer attesting to manufacturer’s approval of installer.

F. RSN 07 53 23-5, Qualifications:

1. Manufacturer: Company specializing in manufacturing products specified in this Section with a minimum of five years of documented experience.

2. Applicator: Company specializing in performing Work of this Section with minimum five years documented experience.

G. RSN 07 53 23-6, Warranties:

Revised 07 53 23 - 4

H. RSN 07 53 23-7, Notification of Pre-installation meeting:

1. Submit schedule for the new roof system installation and sequencing procedures.

1.05 PERFORMANCE REQUIREMENTS

A. Provide installed roofing membrane and base flashings that remain watertight.

1.06 QUALITY ASSURANCE

A. Perform Work in accordance with the NRCA Roofing and Waterproofing Manual and Low-Slope Membrane Roofing Design Guidelines.

B. Roof Assembly Fire Classification: Minimum Class A when tested in accordance with ASTM E108 or UL 790.

1. Roof Assembly with Foam Insulation: Passes UL 1256.

C. Flood testing of roof system, causing water depths to exceed approximately 1/8”, will not be allowed at this facility.

D. Install leak detection system compatible with installed water barrier system.

1. Prior to installation of geofoam block assembly, the leak detection system shall be tested to verify entire installed water barrier system is of sound integrity without any indication of moisture intrusion beyond barrier.

1.07 DELIVERY, STORAGE, AND HANDLING

A. Store and handle materials in accordance with manufacturer’s instructions.

B. Deliver materials to jobsite in manufacturer’s original unopened packaging with labels intact.

C. Store materials in protected area in accordance with manufacturer’s instructions.

1.08 ENVIRONMENTAL REQUIREMENTS

A. Comply with protective requirements in Section 01 56 10 – Protection of Existing Installations and Section 01 56 15 – Protection of Existing Utilities of these Specifications.

B. Comply with manufacturer’s environmental restrictions.

C. Do not apply roofing membrane materials during unsuitable weather as recommended by the Manufacturer without proper weather protection.

D. Do not apply roofing membrane materials to damp or frozen deck surface or when precipitation is expected or occurring.

Revised 07 53 23 - 5

E. Do not expose materials vulnerable to water or sun damage in quantities greater than can be weatherproofed same day.

1.09 WARRANTY

A. Furnish twenty (20) year manufacturer's warranty, without monetary limitation, in which manufacturer agrees to repair or replace all components and accessories, of the roofing membrane system (and all elements of roofing system below membrane) that fail in materials or workmanship within the specified warranty period. Warranty shall not be limited by damage resulting from wind as project system is not subjected to these forces.

Leaks are considered as failure.

B. Warranty shall include all labor and materials necessary for removal and reinstallation of the roofing membrane system (and all elements of roofing system below membrane), not including overburden materials.

C. Clearly identify contact for warranty repairs.

D. One (1) warranty shall be issued to the Bureau of Reclamation (Owner) which covers the Shoshone Powerplant Roofing System.

PART 2 PRODUCTS

2.01 BALLAST

A. Top Course and Drainage Zones:

1. Maximum size: 3” diameter

2. Minimum size: 1 ½” diameter

3. Angularity: Round / Smooth

4. Less than 1% passing the No. 100 sieve

B. Region within 1’-0 of Perforated HDPE Pipe:

1. Maximum: 1 ½” diameter

2. Minimum: ¾” diameter

3. Angularity: Round / Smooth

4. Less than 1% passing the No. 100 sieve

2.02 VAPOR RETARDER

A. ASTM C 755

B. Maximum Allowable Perm Rating: 1.0

Revised 07 53 23 - 6

C. Conforming to Manufacturer’s requirements for warranty of the roofing system.

2.03 GEOTEXTILE FILTER FABRIC

A. Tensile Strength: ASTM D 4632 Minimum 205 pounds

B. Trapezoidal Tear: ASTM D 4533 Minimum 35 pounds

C. CBR Puncture Strength: ASTM D 6241 Minimum 535 pounds

D. Water Flow Rate: ASTM D 4491 Minimum 90 gpm/sf

2.04 THERMAL INSULATION AND COVERBOARD

A. Polyisocyanurate Foam Board Roof Insulation

B. ASTM C 1289-12A.

C. Type II, Class 1, Grade 2: Non-reinforced core foam

D. Maximum board size: 4-foot by 8-foot

E. Board thickness: 2-inches (unless noted otherwise on drawings).

F. Manufactured without hydrochloroflourocarbon (HCFC) blowing agents

2.05 EPDM THERMOSET ROOF MEMBRANE

A. Conforming to ASTM D 4637

B. Minimum thickness: 60 mils

C. Reinforced sheets compatible with Leak Detection System

2.06 FLASHING MEMBRANE

A. Transition membrane located at vertical parapet face.

B. Conforming to ASTM D 4637

C. Minimum thickness: 60 mils

D. Reinforced sheets compatible with Leak Detection System

E. Conforming to Manufacturer’s requirements for warranty of the roofing system

2.07 CANTS

A. Material: As required by manufacturer

Revised 07 53 23 - 7

B. Attachment: As required by manufacturer

2.08 LEAK DETECTION SYSTEM

A. Conforming to ASTM D7877-14.

B. Requires a conductive substrate under the roofing membrane to serve as a ground return path for the test currents. In roof assemblies where the roofing membrane is installed over electric insulating materials such as insulating foam or a cover board; the electrical path to any conductive deck is interrupted. The situation can be remedied by placing a conductive material directly under the membrane. The conductive material provides the return path for the test currents.

C. Incorporate use of compatible scanning equipment in coordination with properly applied conductive primer substrate.

1. Acceptable manufacturer: Detec Systems, PO Box 31725, Bellingham WA 98228, or equivalent having the following essential characteristics:

a. Conductive primer coating for cover boards;

b. Compatible with EPDM roofing membranes;

c. Applied using roller or spray equipment;

d. Equipment shall be capable of identifying any breach of roof membrane and discontinuity of conductivity within a one square foot area.

D. Perform an electrical conductance leak detection survey of entire roof surface area to document and verify integrity of water barrier system.

1. Provide copy of final report to Reclamation.

2.09 ROOF ACCESSORIES

A. Fasteners

1. All fasteners, used for securing the roofing system, shall be compatible with EPDM membrane and polyisocyanurate foam board roof insulation and meet Manufacturer’s requirements for warranty of the roofing system.

B. Other Accessories

1. All roof accessories shall be compatible with EPDM membrane and polyisocyanurate foam board roof insulation and meet Manufacturer’s requirements for warranty of the roofing system.

C. Adhesives

1. All adhesives and sealants required for installation of the insulation, roof membrane and flashing components shall meet Manufacturer’s requirements for warranty of the roofing system.

Revised 07 53 23 - 8

2. Low Volatile Organic Compound (VOC) bonding adhesive specifically recommended by the Manufacturer shall be used for bonding membrane flashing to the EPDM.

3. VOC shall be less than 250 grams per liter.

D. Polyurethane sealant at flashing elements satisfying requirements of EPDM manufacturer.

E. Concrete waterproof coating at top surface of new curb.

PART 3 EXECUTION

3.01 EXAMINATION

A. Government shall inspect and address in-place documentation of top of existing concrete roof deck surface conditions.

1. Notify COR at least 14 days prior to final preparation of top of existing concrete roof deck surface by cleaning in accordance with Section 01 74 00.

2. Government reserves the right to an unrestricted two day continuous time period for inspection and to document top of existing concrete roof deck surface, following concrete deck preparation.

B. Verify concrete deck is clean and smooth, flat, free of depressions, waves, or projections, properly sloped to drains and suitable for installation of roof system.

C. Verify concrete deck surfaces are dry and free of snow or ice.

D. Confirm concrete deck moisture content is acceptable to roofing manufacturer using a quality calibrated moisture meter.

E. Deteriorated or damaged areas of concrete roof deck encountered prior to new roof system installation shall be immediately reported to the COR.

3.02 PREPARATION

A. Prepare clean, smooth and dry substrate. Maintain application surfaces in clean and dry condition during installation of roof system components.

3.03 INSTALLATIONS

A. Vapor retarder shall be installed in accordance with Manufacturer’s recommendation.

B. Rigid insulation / cover-board assembly will be utilized to provide an even, smooth surface to install the waterproof roofing system. The existing slopes of the existing concrete roof deck, identified in Section 52 00 00 – Drawings, Drawing No. 1458-600- 60000, will be maintained for drainage.

Revised 07 53 23 - 9

C. Polyisocyanurate Foam Board Insulation and Cover-boards:

1. Insulation should be protected from the weather during storage and installation.

Exposed material should be covered with the roof membrane by the end of each day’s work.

2. Care should be taken to reduce or eliminate construction traffic and equipment on the insulation to reduce and prevent its compression.

D. Leak Detection System:

1. Install in accordance with manufacturer’s instructions.

E. EPDM Thermoset Roof Membrane:

1. Roof membrane will be installed over clean dry surfaces. Installation should only occur when weather conditions are dry. Observe cold-weather roofing precautions and guidelines as recommended by the Manufacturer when applying roof membrane below 40°F. Special attention should be given when installing thermoset membranes in adhesive during cold weather.

2. If precipitation occurs before completely installing a roof membrane, un-seamed membrane surfaces should be thoroughly dried before final seaming processes are commenced.

3. Roof membrane sheets should be applied so that the flow of water runoff will not be against the laps.

4. Irregularities, such as wrinkles in laps, should be smoothed before seaming of roof membrane. Openings not capable of being bonded without wrinkling the roof membrane should be cut and patched according to the Manufacturer’s instructions.

5. Care should be taken to reduce or eliminate construction traffic and equipment on the roof membrane.

6. All seaming will be in accordance with Manufacturer’s instructions.

7. Perimeter securement and roof expansion joint installation will be in accordance with the Manufacturer’s instructions.

F. Flashing and Accessories Installation:

1. All roof to wall transitions will be designed and installed in accordance with the Manufacturer’s instructions and in coordination with details represented on in Section 52 00 00 – Drawings, Drawing No. 1458-600-60002.

G. Aggregate Surfacing Installation:

1. Apply uniform course thicknesses as represented in Section 52 00 00 – Drawings, Drawing No.’s 1458-600-60000 and 1458-600-60002.

2. Utilize care when placing ballast.

Revised 07 53 23 - 10

H. Geotextile Filter Fabric:

1. Repair tears in accordance with Manufacturer’s instructions. Tears too large to repair to the satisfaction of the COR, will require replacement of the entire textile sheet.

I. Install Work in accordance with NRCA and manufacturer’s recommendation.

3.04 CLEANING

A. Clean up all excess materials, waste and rubbish from rooftop and ground staging areas in accordance with Section 01 74 00 – Cleaning and Waste Management.

B. Repair or replace defaced or disfigured finishes caused by Work of this section.

3.05 REPAIR

A. Replace materials with damaged finish detrimental to serving the purpose of warranty.

3.06 PROTECTION

A. Protect completed roof from construction traffic in accordance with manufacturer’s recommendations.

END OF SECTION