Amend 0001 - W912HY20B0028.pdf

W45VAK01051904 002160

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

1. CONTRACT ID CODE PAGE OF PAGES

J 1 48

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

16C. DATE SIGNED

BY

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 W912HY20B0028

X 9B. DATED (SEE ITEM 11)

03-Jun-2020

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, 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 0 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.)

Addicks and Barker Project Off ice Building Construction in Houston, Harris County, Texas is hereby amended to incorporate the following:

10A. MOD. OF CONTRACT/ORDER NO.

2. AMENDMENT/MODIFICATION

NO.

A0001

5. PROJECT NO.(If applicable)

6. ISSUED BY

3. EFFECTIVE DATE

02-Jul-2020

CODE

US ARMY CORPS OF ENGINEERS

GALVESTON DISTRICT

CONTRACTING DIVISION

2000 FORT POINT ROAD

GALVESTON TX 77550-1229

W912HY 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

X

SWG File No.: HSC 402-277 Solicitation No.: W912HY20B0028 Addicks and Barker Project Office Houston, Texas

AMENDMENT 0001

ADDICKS AND BARKER PROJECT OFFICE

Houston, Texas

Solicitation No.: W912HY20B0028

1. The specifications and drawings for Solicitation No. W912HY20B0028, Addicks and Barker Project Office in Harris County, Texas, for which bids are due 6 July at 2:00 P.M. local time are hereby amended as follows:

THE BID OPENING DATE IS HERBY RESCHEDULED FOR 14 JULY 2020 AT 2:00 P.M. LOCAL TIME.

SPECIFICATIONS:

The revised/new sections/appendices/pages listed below are hereby added to or revised and made a part of the solicitation.

Changes by narrative:

SECTION 00 72 00, Contract Clauses – The following CONTRACT CLAUSES are hereby referenced:

52.228-15, Performance and Payment Bonds—Construction (DEVIATION 2020-O0016) 52.228-16, Performance and Payment Bonds—Other than Construction (DEVIATION 2020- O0016)

SPECIFICATIONS:

Section 26 28 21.00 40 Transfer Switches

1. Added specification section in its entirety.

Section 26 32 14.00 10 NATURAL GAS GENERATOR SET, STATIONARY 15-300 KW, STANDBY

APPLICATIONS

1. Page 1 – Revised title of specification to “NATURAL GAS GENERATOR SET, STATIONARY 15-300 KW, STANDBY APPLICATIONS”.

2. Page 7 – Subsection 1.4.2 Experience: Revised all references of “diesel” to indicate “natural gas”.

3. Page 13 – Subsection 2.10.1 Flexible Sections and Expansion Joints: Revised all references of “diesel” to indicate “natural gas”.

4. Page 22 – Subsection 3.3.1 General: Revised all references of “diesel” to indicate “natural gas”.

5. Page 23 – Subsection 3.3.3 Flanged Joints: Revised all references of “diesel” to indicate “natural gas”.

6. Page 30 – Subsection 3.10 Instructions: Revised first sentence to read “Two sets of instructions shall be typed and framed by contractor under weatherproof laminated plastic, and posted side-by-side where directed before acceptance.”

Addicks and Barker Project Office Houston, Texas

7. Page 31 – Subsection 3.11 Acceptance: Revised all references of “diesel” to indicate “natural gas”.

DRAWINGS:

Sheet G-001 Cover Sheet

1. Revised submittal name and date to reflect Amendment 01.

Sheet C-111 DEMOLITION PLAN – EXISTING SITE

1. Building Demolition Note 1 updated to read “EXISTING BUILDING STRUCTURES, GENERATOR, ANTENNAS AND ANTENNA FOUNDATIONS, TOWERS AND TOWER FOUNDATIONS, AND BOLLARDS SHALL BE DEMOLISHED IN THEIR ENTIRETY. CONCRETE SLABS AND

FOUNDATIONS SHALL BE REMOVED AND AREAS BACK-FILLED TO GRADE. GRADE SHALL

DRAIN AND BE SEEDED”.

2. Building Demolition Note 3 added to read “ALL INSTALLED ITEMS ARE TO BE

REMOVED UNLESS SPECIFICALLY SHOWN TO REMAIN”.

Sheet C-130 UTILITY PLAN

1. Gas line revised to utilize one meter for the entire project site. Meter and tapping of existing gas main removed from the Maintenance Shop area.

2. Gas line updated to serve generator located southwest of the Project Office.

Regulator to be provided at the generator.

Sheet A-505 PLAN DETAILS

1. Added Detail 6 in its entirety.

Sheet ES-101 ELECTRICAL SITE PLAN

1. Manual transfer switch “MTS1” revised to be “MTS”.

2. Manual transfer switch “MTS2” revised to be Automatic transfer switch “ATS”.

3. Clarified the route of the (2) – 1-1/2” conduits to run from HP01 to HM1.

Sheet EP-110 ELECTRICAL POWER PLAN

Sheet E-600 ELECTRICAL ONELINE DIAGRAM

3. Control wiring between ATS and generator added.

Addicks Barker Project Office Houston, Texas

SECTION 26 28 21.00 40

TRANSFER SWITCHES

05/17

PART 1 GENERAL

Section 26 20 00 INTERIOR DISTRIBUTION SYSTEM applies to work specified in this section.

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.

NATIONAL AERONAUTICS AND SPACE ADMINISTRATION (NASA)

RCBEA GUIDE (2004) NASA Reliability Centered Building and Equipment Acceptance Guide

NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)

NEMA 250 (2018) Enclosures for Electrical Equipment (1000 Volts Maximum)

NEMA ICS 10 Part 2 (2005) AC Transfer Equipment, Part 2:

Static AC Transfer Equipment

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 70 (2019; TIA 19-1; TIA 19-2; TIA 19-3; TIA

19-4; ERTA 1 2019) National Electrical Code

UNDERWRITERS LABORATORIES (UL)

UL 508 (2018) UL Standard for Safety Industrial Control Equipment

UL 1008 (2014) Transfer Switch Equipment

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. Submittals with an "S" are for inclusion in the Sustainability eNotebook, in conformance to Section 01 33 29 SUSTAINABILITY REPORTING. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

Connection Diagrams; G [, [____]]

Fabrication Drawings; G [, [____]]

Installation Drawings; G [, [____]]

SECTION 26 28 21.00 40 Page 1 Amendment 01 June 25, 2020

SD-03 Product Data

Equipment and Performance Data; G [, [____]]

Contacts; G [, [____]]

Indicating Lights; G [, [____]]

Terminal Board; G [, [____]]

Enclosures; G

SD-06 Test Reports

Qualification Testing; G

Operation Tests; G

SD-07 Certificates

Listing of Product Installations; G

SD-08 Manufacturer's Instructions

Manufacturer's Instructions

1.3 QUALITY CONTROL

1.3.1 Product Installations

Submit listing of product installations for automatic transfer switches showing the manufacturer has successfully manufactured automatic transfer switches of the size specified for a minimum period of 10 years. Include on the list, purchaser, address of installation, service organization, and date of installation.

1.3.2 Predictive Testing and Inspection Technology Requirements

This section contains systems and equipment components regulated by NASA's Reliability Centered Building and Equipment Acceptance Program. This program requires the use of Predictive Testing and Inspection (PT&I) technologies in conformance with the RCBEA GUIDE to ensure building equipment and systems have been installed properly and contain no identifiable defects that shorten the design life of a system or its components. Satisfactory completion of all acceptance requirements is necessary to obtain Government approval and acceptance of the Contractor's work.

PART 2 PRODUCTS

2.1 SYSTEM DESCRIPTION

Provide an automatic transfer switch with a time-delay feature that is field-adjustable from 2 to 30 minutes. The switch delays the automatic transfer back to normal power until the normal source voltage and frequency reach at least 95 percent of the rated voltage. However, if the emergency power fails and the normal source is again available at 90 percent of the rated voltage, bypass the time-delay circuitry, and

SECTION 26 28 21.00 40 Page 2 transfer the load immediately back to the normal source. Provide the capability for manual transfer in either direction. Operate sensing relays without contact chatter or false response during voltage variations between dropout and pickup.

Submit connection diagrams showing the relations and connections of contacts, indicating lights, and terminal board by showing the general physical layout of all controls and the interconnection of one system (or portion of system) with another.

Provide a manual transfer switch for transfer of power between stationary generator and a portable generator docking station. The switch shall have a rotary handle with Normal-Off-Emergency options. It shall be in a lockable enclosure to prevent unauthorized access.

Submit fabrication drawings for contacts, indicating lights, terminal board enclosures, and accessories, consisting of fabrication and assembly details to be performed in the factory.

Submit installation drawings for automatic transfer equipment in accordance with paragraph INSTALLATION.

Submit equipment and performance data for automatic transfer equipment including useful life, test, system functional flows, safety features, and mechanical automated details.

2.1.1 Performance Requirements

2.1.1.1 Application

Provide an automatic transfer switch capable of transferring the load from the normal power source to emergency power source, and from an emergency source to the normal power source. Locate the switch where indicated.

Provide a switch that is solenoid-operated, mechanically held, double-throw, rated for continuous duty, capable of transferring in 100 milliseconds or less, and conforming to the applicable requirements of UL 1008 and NFPA 70 , Article 700, except as herein modified.

Provide an automatic transfer switch of the four-pole type for three-phase application. Provide an additional switched neutral pole.

Ensure that the automatic transfer switch is capable of being placed in either the normal or the emergency position.

Provide a manual transfer switch capable of transferring the load from stationary generator to the generator docking station, and from the generator docking station to the stationary generator. Locate the switch where indicated. Provide a switch that is mechanically-operated, mechanically held, double-throw, rated for continuous duty and conforming to the applicable requirements of UL 1008 and NFPA 70 , Article 700, except as herein modified.

Provide a manual transfer switch of the four-pole type for three-phase application. Provide an additional switched neutral pole. Ensure that the manual transfer switch is capable of being placed in either the stationary generator or the generator docking station position.

SECTION 26 28 21.00 40 Page 3

2.1.1.2 Operation

For the automatic transfer switch, monitor the normal source voltage across phase lines by sensing devices. If the normal source voltage in phase drops to 90 percent or less for a timed period, ensure that the automatic transfer switch starts the emergency source and transfers the load to the emergency source when voltage and frequency reach rated values; or, if the emergency source is on, verify the voltage and frequency of the alternate source and transfer the load to the alternate source. Field-adjust this time period from 1 to 30 seconds. Provide a voltage and frequency sensor relay to monitor the rated values on the emergency side to prohibit transfer until the emergency source voltage and frequency reach at least 95 percent of the required rating. Provide phase failure protection, with a 65- to 70-percent drop and a 92- to 95-percent voltage pickup rating.

2.1.1.3 Self-Test Capability

a. Provide an automatic transfer switch with a control-circuit self-test feature capable of verifying the proper operation of the switch control circuit without moving the main contactor or causing discontinuity of service to the load. Include the following characteristics in the self-test circuit:

(1) A key-operated test switch that includes an auto, off, no-load engine test and a load test position. Include a white light to indicate that the switch is in the off position. Design the key-operated switch to prevent removal of the key while the switch is in the self-test mode.

b. Provide a manual transfer switch with a control-circuit self-test feature capable of verifying the proper operation of the switch control circuit without moving the main contactor or causing discontinuity of service to the load. Include the following characteristics in the self-test circuit:

(1) A key-operated test switch that includes an auto, off, no-load engine test and a load test position. Include a white light to indicate that the switch is in the off position.

2.2 COMPONENTS

2.2.1 Contacts

Provide main contacts with a wiping-action silver alloy that, when rated for operation at 50 amperes or greater, are protected against arcing.

Ensure that auxiliary contacts and control transfer relay contacts have a minimum continuous-current rating of not less than 10-amperes inductive at 120 volts ac. Provide the following for auxiliary contacts:

a. Generator-control contacts, normally open, that close on undervoltage or loss of normal power as specified, remaining closed until transfer back to normal power

b. Emergency-position contacts, normally open when the switch is in the normal position, that close when the switch is in the emergency position

c. An automatic transfer switch with a switched neutral. Ensure that the

SECTION 26 28 21.00 40 Page 4 switched neutral has: normal position contacts that are normally closed when the switch is in the normal position and opens when the switch is in the emergency position. Ensure that the neutral pole is fully rated and part of the main pole assembly, so that it is switched simultaneously with the main bus contacts.

Use two-pole auxiliary contacts.

Provide a test automatic transfer switch mounted on door enclosure with contacts rated for operation at 10 amperes.

Provide an automatic transfer switch with overlapping neutral transfer contacts in addition to the two- or three-pole main bus contacts. Ensure that normal and emergency neutral contacts are connected together only during the transfer and retransfer operation. Ensure contacts remain connected only until the power source contacts close/open to transfer from one source to the other. Ensure that the connection time of the overlapping neutral transfer contacts does not exceed 100 milliseconds.

Provide a test manual transfer switch mounted on door enclosure with contacts rated for operation at 10 amperes. Provide a manual transfer switch with overlapping neutral transfer contacts in addition to the two-or three-pole main bus contacts. Ensure that the stationary generator and generator docking station contacts are connected together only during the transfer and retransfer operation. Ensure contracts remain connected only until the power source contacts close/open to transfer from one source to the other. Ensure that the connection time of the overlapping neutral transfer contacts does not exceed 100 milliseconds.

2.2.2 Indicating Lights

Furnish an automatic transfer switch with two indicating lamps: one light to indicate that the switch is operating on normal power, and the other light to indicate that the switch is operating on emergency power. Fuse each indicating circuit.

2.2.3 Terminal Board

Provide a contactor for each transfer switch terminal board for internally wired control devices, indicating lights, auxiliary contacts, and internal control devices or auxiliary switches to a common output terminal board.

Wire the internal functions to facilitate remote connections or monitoring.

2.2.4 Enclosures

Provide transfer switch enclosures with solid, code-gage, 14-gage, minimum sheet metal, NEMA 250, Type 3R, with the manufacturer's standard finish.

2.3 TESTS, INSPECTIONS, AND VERIFICATIONS

2.3.1 Qualification Testing

Provide test data for the furnished units or identical units. Ensure tests meet the general use requirements of UL 508 . Subject the complete transfer switches to a test as outlined in NEMA ICS 10 Part 2 . One cycle of operation tests under the UL 508 test requirements consists of a transfer of load from the normal source to the emergency source and retransfer to the normal source. Test the switches operating time and the sense relay pickup and dropout times.

SECTION 26 28 21.00 40 Page 5

PART 3 EXECUTION

3.1 INSTALLATION

Install transfer switches as indicated, and in accordance with the manufacturer's instructions. Fully align and install wall-mounted enclosures at the indicated mounting height. Do not use sheet metal screws or small machine screws.

3.2 FIELD QUALITY CONTROL

Demonstrate the transfer switches operates in accordance with the specification requirements in conjunction with the normal and emergency power sources.

-- End of Section --

SECTION 26 28 21.00 40 Page 6

SECTION 26 32 14.00 10

NATURAL GAS-GENERATOR SET, STATIONARY 15-300 KW, STANDBY APPLICATIONS

02/10

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.

ASME INTERNATIONAL (ASME)

ASME B16.11 (2016) Forged Fittings, Socket-Welding and Threaded

ASME B16.3 (2016) Malleable Iron Threaded Fittings, Classes 150 and 300

ASME B16.5 (2017) Pipe Flanges and Flanged Fittings NPS 1/2 Through NPS 24 Metric/Inch Standard

ASTM INTERNATIONAL (ASTM)

ASTM A106/A106M (2018) Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service

ASTM A135/A135M (2009; R2014) Standard Specification for Electric-Resistance-Welded Steel Pipe

ASTM A181/A181M (2014) Standard Specification for Carbon Steel Forgings, for General-Purpose Piping

ASTM A234/A234M (2018) Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and High Temperature Service

ASTM A53/A53M (2018) Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless

ELECTRICAL GENERATING SYSTEMS ASSOCIATION (EGSA)

EGSA 101P (1995) Performance Standard for Engine Driven Generator Sets

INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS (IEEE)

IEEE 1 (2000; R 2011) General Principles for Temperature Limits in the Rating of Electric Equipment and for the Evaluation of Electrical Insulation

SECTION 26 32 14.00 10 Page 1

IEEE 120 (1989; R 2007) Master Test Guide for Electrical Measurements in Power Circuits

IEEE 519 (2014) Recommended Practices and Requirements for Harmonic Control in Electrical Power Systems

IEEE 81 (2012) Guide for Measuring Earth Resistivity, Ground Impedance, and Earth Surface Potentials of a Ground System

IEEE C2 (2017; Errata 1-2 2017; INT 1 2017) National Electrical Safety Code

IEEE Stds Dictionary (2009) IEEE Standards Dictionary: Glossary of Terms & Definitions

MANUFACTURERS STANDARDIZATION SOCIETY OF THE VALVE AND FITTINGS

INDUSTRY (MSS)

MSS SP-58 (2018) Pipe Hangers and Supports - Materials, Design and Manufacture, Selection, Application, and Installation

MSS SP-80 (2013) Bronze Gate, Globe, Angle and Check Valves

NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)

NEMA ICS 2 (2000; R 2005; Errata 2008) Industrial Control and Systems Controllers, Contactors, and Overload Relays Rated 600 V

NEMA ICS 6 (1993; R 2016) Industrial Control and Systems: Enclosures

NEMA MG 1 (2018) Motors and Generators

NEMA PB 1 (2011) Panelboards

NEMA/ANSI C12.11 (2007) Instrument Transformers for Revenue Metering, 10 kV BIL through 350 kV BIL (0.6 kV NSV through 69 kV NSV)

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 110 (2019) Standard for Emergency and Standby Power Systems

NFPA 30 (2018) Flammable and Combustible Liquids Code

NFPA 37 (2018) Standard for the Installation and Use of Stationary Combustion Engines and Gas Turbines

NFPA 70 (2017; ERTA 1-2 2017; TIA 17-1; TIA 17-2;

TIA 17-3; TIA 17-4; TIA 17-5; TIA 17-6;

TIA 17-7; TIA 17-8; TIA 17-9; TIA 17-10;

SECTION 26 32 14.00 10 Page 2

TIA 17-11; TIA 17-12; TIA 17-13; TIA

17-14; TIA 17-15; TIA 17-16; TIA 17-17 )

National Electrical Code

SOCIETY OF AUTOMOTIVE ENGINEERS INTERNATIONAL (SAE)

SAE ARP892 (1965; R 1994) DC Starter-Generator, Engine

SAE J537 (2016) Storage Batteries

UNDERWRITERS LABORATORIES (UL)

UL 1236 (2015; Reprint Mar 2016) UL Standard for Safety Battery Chargers for Charging Engine-Starter Batteries

UL 489 (2016) UL Standard for Safety Molded-Case Circuit Breakers, Molded-Case Switches and Circuit-Breaker Enclosures

UL 891 (2005; Reprint Oct 2012) Switchboards

1.2 SYSTEM DESCRIPTION

a. Provide and install each engine-generator set complete and totally functional, with all necessary ancillary equipment to include air filtration; starting system; generator controls, protection, and isolation; instrumentation; lubrication; fuel system; cooling system;

and engine exhaust system. Each engine generator set shall satisfy the requirements specified in the Engine Generator Parameter Schedule. Submit certification that the engine-generator set and cooling system function properly in the ambient temperatures specified.

b. Provide each engine-generator set consisting of one engine, one generator, and one exciter, mounted, assembled, and aligned on one base; and all other necessary ancillary equipment which may be mounted separately. Sets shall be assembled and attached to the base prior to shipping. Set components shall be environmentally suitable for the locations shown and shall be the manufacturer's standard product offered in catalogs for commercial or industrial use. Provide a generator strip heater for moisture control when the generator is not operating.

1.2.1 Engine-Generator Parameter Schedule

ENGINE GENERATOR PARAMETER SCHEDULE

Service Load 100-kW

Power Factor 0.8 lagging

Motor Starting kVA (maximum) 540 KVA at 35 percent Dip

Maximum Speed 1800 rpm

Engine-Generator Application stand-alone

SECTION 26 32 14.00 10 Page 3

ENGINE GENERATOR PARAMETER SCHEDULE

Engine Cooling Type water/ethylene glycol

Heat Exchanger Type fin-tube

Governor Type Isochronous

Frequency Bandwidth percent steady state 0.5 percent

Frequency Regulation (droop) (No load to full load)

3 percent max.

Frequency Bandwidth percent (steady state)

0.5 percent

Voltage Regulation (No load to full load) + 2 percent (max.)

Voltage Bandwidth (steady state) + 1 percent

Frequency 60 Hz

Voltage 480Y/277 volts

Phases 3 Phase, Wye

Nonlinear Loads 20 kVA

Max Step Load Increase 100 percent of Service Load at 0.80 PF

Max Step Load Decrease (w/o shutdown) 100 percent of Service Load at 0.80 PF

Max Time to Start and be Ready to Assume Load

10 seconds

Max Summer Outdoor Temp (Ambient) 110 degrees F

Min Winter Outdoor Temp (Ambient) 20 degrees F

Installation Elevation 100 above sea level

1.2.2 Output Capacity

Provide each generator set with power equal to the sum of service load plus the machine's efficiency loss and associated ancillary equipment loads. Rated output capacity shall also consider engine and/or generator oversizing required to meet requirements in paragraph Engine-Generator Parameter Schedule.

SECTION 26 32 14.00 10 Page 4

1.2.3 Power Rating

Standby ratings shall be in accordance with EGSA 101P.

1.2.4 Engine Generator Set Enclosure

The engine generator set enclosure shall be corrosion resistant, fully weather resistant, contain all set components, and provide ventilation to permit operation at rated load under secured conditions. Provide doors for access to all controls and equipment requiring periodic maintenance or adjustment. Provide removable panels for access to components requiring periodic replacement. The enclosure shall be capable of being removed without disassembly of the engine-generator set or removal of components other than exhaust system. The enclosure shall reduce the noise of the generator set to within the limits specified in the paragraph SOUND

LIMITATIONS.

1.2.5 Vibration Isolation

1.2.5.1 Vibration Limitations

The maximum engine-generator set vibration in the horizontal, vertical and axial directions shall be limited to 6 mils (peak-peak RMS), with an overall velocity limit of 0.95 inches/seconds RMS, for all speeds through 110 percent of rated speed. The engine-generator set shall be provided with vibration-isolation in accordance with the manufacturer's standard recommendation.

1.2.5.2 Torsional Analysis

Submit torsional analysis including prototype testing or calculations which certify and demonstrate that no damaging or dangerous torsional vibrations will occur when the prime mover is connected to the generator, at synchronous speeds, plus/minus 10 percent.

1.2.6 Reliability and Durability

Submit documentation which cites engines and generators in similar service to demonstrate compliance with the requirements of this specification.

Certification does not exclude annual technological improvements made by a manufacturer in the basic standard model set on which experience was obtained, provided parts interchangeability has not been substantially affected and the current standard model meets all the performance requirements of this specification. For each different set, 2 like sets shall have performed satisfactorily in a stationary power application, independent and separate from the physical location of the manufacturer's and assembler's facilities, for a minimum of 2 consecutive years without any failure to start, including periodic exercise. The certification shall state that for the set proposed to meet this specification, there were no failures resulting in downtime for repairs in excess of 72 hours or any failure due to overheating during 2 consecutive years of service.

Like sets are of the same model, speed, bore, stroke, number and configuration of cylinders, and output power rating. Like generators are of the same model, speed, pitch, cooling, exciter, voltage regulator and output power rating. A list shall be provided with the name of the installations, completion dates, and name and telephone number of a point of contact.

SECTION 26 32 14.00 10 Page 5

1.3 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. Submittals with an "S" are for inclusion in the Sustainability eNotebook, in conformance to Section 01 33 29 SUSTAINABILITY REPORTING. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

Detailed Drawings; G Acceptance; G

SD-03 Product Data

Manufacturer's Catalog Instructions; G Experience Field Engineer General Installation Site Visit

SD-05 Design Data

Sound Limitations; G Generator Power Factor Heat Exchanger Time-Delay on Alarms Cooling System Vibration Isolation

SD-06 Test Reports

Performance Tests Onsite Inspection and Acceptance Tests; G

SD-07 Certificates

Vibration Isolation Prototype Tests Reliability and Durability Emissions Sound limitations Current Balance Materials and Equipment Factory Inspection and Tests Inspections Cooling System

SD-10 Operation and Maintenance Data

Operation Manual; G Maintenance Manual; G Extra Materials

SECTION 26 32 14.00 10 Page 6

1.4 QUALITY ASSURANCE

1.4.1 Conformance to Codes and Standards

Where equipment is specified to conform to requirements of any code or standard such as UL, the design, fabrication and installation shall conform to the code.

1.4.2 Experience

Each component manufacturer shall have a minimum of 3 years experience in the manufacture, assembly and sale of components used with stationary natural gas engine-generator sets for commercial and industrial use. The engine-generator set manufacture/assembler shall have a minimum of 3 years experience in the manufacture, assembly and sale of stationary natural gas engine-generator sets for commercial and industrial use. Submit a statement showing and verifying these requirements.

1.4.3 Field Engineer

The engine-generator set manufacturer or assembler shall furnish a qualified field engineer to supervise the complete installation of the engine-generator set, assist in the performance of the onsite tests, and instruct personnel as to the operational and maintenance features of the equipment. The field engineer shall have attended the engine-generator manufacturer's training courses on installation and operation and maintenance for engine generator sets. Submit a letter listing the qualifications, schools, formal training, and experience of the field engineer.

1.4.4 Detailed Drawings

Submit detailed drawings showing the following:

a. Base-mounted equipment, complete with base and attachments including anchor bolt template and recommended clearances for maintenance and operation.

b. Starting system.

c. Fuel system.

d. Cooling system.

e. Exhaust system.

f. Electric wiring of relays, breakers, programmable controllers, and switches including single line and wiring diagrams.

g. Lubrication system, including piping, pumps, strainers, filters, heat exchangers for lube oil and turbocharger cooling, controls and wiring.

h. Location, type, and description of vibration isolation devices.

i. The safety system, including wiring schematics.

j. One-line schematic and wiring diagrams of the generator, exciter, regulator, governor, and all instrumentation.

SECTION 26 32 14.00 10 Page 7

k. Panel layouts.

l. Mounting and support for each panel and major piece of electrical equipment.

m. Engine-generator set rigging points and lifting instructions.

1.5 DELIVERY, STORAGE AND HANDLING

Properly protect materials and equipment in accordance with the manufacturers recommended storage procedures, before, during, and after installation. Protect stored items from the weather and contamination.

During installation, piping and similar openings shall be capped to keep out dirt and other foreign matter.

1.6 MAINTENANCE SERVICE

Submit the operation and maintenance manuals and have them approved prior to commencing onsite tests.

1.6.1 Operation Manual

Provide three copies of the manufacturers standard operation manual.

Sections shall be separated by heavy plastic dividers with tabs which identify the material in the section. Drawings shall be folded blue lines, with the title block visible, and placed in 8-1/2 by 11 inch plastic pockets with reinforced holes. The manual shall include:

a. Step-by-step procedures for system startup, operation, and shutdown;

b. Drawings, diagrams, and single-line schematics to illustrate and define the electrical, mechanical, and hydraulic systems with their controls, alarms, and safety systems;

c. Procedures for interface and interaction with related systems to include automatic transfer switches.

1.6.2 Maintenance Manual

Provide three copies of the manufacturers standard maintenance manual.

Each section shall be separated by a heavy plastic divider with tabs.

Drawings shall be folded, with the title block visible, and placed in plastic pockets with reinforced holes. The manual shall include:

a. Procedures for each routine maintenance item. Procedures for troubleshooting.

b. The manufacturer's recommended maintenance schedule.

c. A component list which includes the manufacturer's name, address, type or style, model or serial number, rating, and catalog number for the major components listed in paragraph GENERAL REQUIREMENTS.

d. A list of spare parts for each piece of equipment and a complete list of materials and supplies needed for operation.

1.6.3 Extra Materials

Provide two sets of special tools and two sets of filters required for

SECTION 26 32 14.00 10 Page 8 maintenance. Special tools are those that only the manufacturer provides, for special purposes, or to reach otherwise inaccessible parts. One handset shall be provided for each electronic governor when required to indicate and/or change governor response settings. Supply two complete sets of filters in a suitable storage box in addition to filters replaced after testing.

PART 2 PRODUCTS

2.1 NAMEPLATES

Each major component of this specification shall have the manufacturer's name, type or style, model or serial number, and rating number on a plate secured to the equipment. As a minimum, nameplates shall be provided for: Engines; Generators; Transformers (CT & PT).

Where the following equipment is provided as a standard component by the natural gas-engine generator set manufacturer, the nameplate information may be provided in the maintenance manual in lieu of nameplates.

Battery charger Heaters Exhaust mufflers Exciters Switchgear Silencers Battery

2.2 SAFETY DEVICES

Exposed moving parts, parts that produce high operating temperatures, parts which may be electrically energized, and parts that may be a hazard to operating personnel during normal operation shall be insulated, fully enclosed, guarded, or fitted with other types of safety devices. The safety devices shall be installed so that proper operation of the equipment is not impaired.

2.3 MATERIALS AND EQUIPMENT

Materials and equipment shall be as specified. Submit a letter certifying that where materials or equipment are specified to comply with requirements of UL, or other standards, written proof of such compliance has been obtained. The label or listing of the specified agency, or a written certificate from an approved, nationally recognized testing organization equipped to perform such services, stating that the items have been tested and conform to the requirements and testing methods of the specified agency are acceptable as proof.

2.3.1 Circuit Breakers, Low Voltage

UL 489 .

2.3.2 Filter Elements (Fuel-oil, Lubricating-oil, and Combustion-air)

Manufacturer's standard.

2.3.3 Instrument Transformers

NEMA/ANSI C12.11 .

SECTION 26 32 14.00 10 Page 9

2.3.4 Pipe (Fuel/Lube-oil, Compressed-Air, Coolant and Exhaust)

ASTM A53/A53M, ASTM A106/A106M or ASTM A135/A135M , steel pipe. Pipe smaller than 2 inches shall be Schedule 80. Pipe 2 inches and larger shall be Schedule 40.

2.3.5 Pipe Flanges and Fittings

2.3.5.1 Pipe Flanges and Flanged Fittings

ASTM A181/A181M , Class 60, or ASME B16.5 , Grade 1, Class 150.

2.3.5.2 Pipe Welding Fittings

ASTM A234/A234M , Grade WPB or WPC, Class 150, or ASME B16.11 , 3000 lb.

2.3.5.3 Threaded Fittings

ASME B16.3 , Class 150.

2.3.5.4 Valves

MSS SP-80 , Class 150.

2.3.5.5 Gaskets

Manufacturers Standard.

2.3.6 Pipe Hangers

MSS SP-58 .

2.3.7 Electrical Enclosures

2.3.7.1 General

NEMA ICS 6 .

2.3.7.2 Panelboards

NEMA PB 1.

2.3.8 Electric Motors

Electric motors shall conform to the requirements of NEMA MG 1. Motors shall have sealed ball bearings, a maximum speed of 1800 rpm and integral automatic or manual reset thermal overload protectors. Motors used indoors shall have drip proof frames; those used outside shall be totally enclosed. AC motors larger than 1/2 Hp shall be of the squirrel cage induction type for standard voltage of 460 volts, 60 Hz three phase power. AC motors 1/2 Hp or smaller, shall be for standard voltage 115 volts, 60 Hz, single phase power.

2.3.9 Motor Controllers

Motor controllers and starters shall conform to the requirements of NFPA 70 and NEMA ICS 2 .

SECTION 26 32 14.00 10 Page 10

2.4 ENGINE

Each engine shall operate on natural gas, shall be designed for stationary applications and shall be complete with ancillaries. The engine shall be a standard production model described in the manufacturer's catalog data, which describes and depicts each engine-generator set and all ancillary equipment in sufficient detail to demonstrate specification compliance.

The engine shall be naturally aspirated, scavenged, supercharged or turbocharged. The engine shall be four-stroke-cycle. The engine shall be vertical inline, V-, or opposed-piston type, with a solid cast block or individually cast cylinders. The engine shall have a minimum of two cylinders. Opposed-piston type engines shall have no less than four cylinders. Each block shall have a coolant drain port. Each engine shall be equipped with an overspeed sensor.

2.5 FUEL SYSTEM

The natural gas fuel system for the engine generator set shall conform to the requirements of NFPA 30 and NFPA 37 and contain the following elements.

2.6 LUBRICATION

Each engine shall have a separate lube-oil system conforming to NFPA 30 and NFPA 37 . Each system shall be pressurized by engine-driven oil pumps. Each system shall be furnished with a relief valve for oil pressure regulation (for closed systems) and a dip-stick for oil level indications. The crankcase shall be vented in accordance with the manufacturer's recommendation except that it shall not be vented to the engine exhaust system. Crankcase breathers, if provided on engines installed in buildings or enclosures, shall be piped to vent to the outside. The system shall be readily accessible for service such as draining, refilling, etc. Each system shall permit addition of oil and have oil-level indication with the set operating. The system shall utilize an oil cooler as recommended by the engine manufacturer.

2.6.1 Filter

One full-flow filter shall be provided for each pump. The filter shall be readily accessible and capable of being changed without disconnecting the piping or disturbing other components. The filter shall have inlet and outlet connections plainly marked.

2.6.2 Lube-Oil Sensors

Each engine shall be equipped with lube-oil pressure sensors. Pressure sensors shall be located downstream of the filters and provide signals for required indication and alarms.

2.7 COOLING SYSTEM

Each engine cooling system shall operate automatically while the engine is running. Each cooling system shall be sized for the maximum summer outdoor design temperature and site elevation. Water-cooled system coolant shall use a combination of water and ethylene-glycol sufficient for freeze protection at the minimum winter outdoor temperature specified. The maximum temperature rise of the coolant across the engine shall be no more than that recommended and submitted.

a. The maximum and minimum allowable inlet temperatures of the coolant

SECTION 26 32 14.00 10 Page 11 fluid.

b. The maximum allowable temperature rise in the coolant fluid through the engine.

2.7.1 Coolant Pumps

Coolant pumps shall be the centrifugal type. Each engine shall have an engine-driven primary pump.

2.7.2 Heat Exchanger

Each heat exchanger shall be of a size and capacity to limit the maximum allowable temperature rise in the coolant across the engine to that recommended and submitted in accordance with paragraph SUBMITTALS for the maximum summer outdoor design temperature and site elevation. Each heat exchanger shall be corrosion resistant, suitable for service in ambient conditions of application. Submit manufacturers data to quantify heat rejected to the space with the engine generator set at rated capacity.

2.7.2.1 Fin-Tube-Type Heat Exchanger (Radiator)

Heat exchanger may be factory coated with corrosive resistant film providing that corrosion measures are taken to restore the heat rejection capability of the radiator to the initial design requirement via oversizing, or other compensating methods. Internal surfaces shall be compatible with liquid fluid coolant used. Materials and coolant are subject to approval by the Contracting Officer. Heat exchangers shall be pressure type incorporating a pressure valve, vacuum valve and a cap.

Caps shall be designed for pressure relief prior to removal. Each heat exchanger and the entire cooling system shall be capable of withstanding a minimum pressure of 7 psi. Each heat exchanger shall be protected with a strong grille or screen guard. Each heat exchanger shall have at least two tapped holes. One tapped hole in the heat exchanger shall be equipped with a drain cock, the rest shall be plugged.

2.7.3 Temperature Sensors

Each engine shall be equipped with coolant temperature sensors.

Temperature sensors shall provide signals for pre-high and high indication and alarms.

2.8 SOUND LIMITATIONS

The noise generated by the generator set operating at 100 percent load shall not exceed the following sound pressure levels in any of the indicated frequencies when measured in a free field at a radial distance of

22.9 feet at 45 degrees apart in all directions. Submit data to demonstrate compliance with these sound limitation requirements. Also submit certification from the manufacturer stating that the sound emissions meet the specification.

Frequency Band (Hz) Maximum Acceptable Pressure Level (Decibels)

63 87

SECTION 26 32 14.00 10 Page 12

Frequency Band (Hz) Maximum Acceptable Pressure Level (Decibels)

125 77

250 70

500 64

1000 61

2000 60

4000 60

8000 62

2.9 AIR INTAKE EQUIPMENT

Filters and silencers shall be provided in locations that are convenient for servicing. The silencer shall be of the high-frequency filter type, located in the air intake system as recommended by the engine manufacturer. Silencer shall be capable of reducing the noise level at the air intake to a point below the maximum acceptable levels specified in paragraph SOUND LIMITATIONS. A combined filter-silencer unit meeting requirements for the separate filter and silencer items may be provided.

Expansion elements in air-intake lines shall be rubber.

2.10 EXHAUST SYSTEM

The system shall be separate and complete for each engine. Piping shall be supported so as to minimize vibration. Where a V-type engine is provided, a V-type connector with necessary flexible sections and hardware shall connect the engine exhaust outlets.

2.10.1 Flexible Sections and Expansion Joints

A flexible section at each engine and an expansion joint at each muffler shall be provided. Flexible sections and expansion joints shall have flanged connections. Flexible sections shall be made of convoluted seamless tube without joints or packing. Expansion joints shall be the bellows type. Expansion and flexible elements shall be stainless steel suitable for natural gas-engine exhaust gas at the maximum exhaust temperature that is specified by the engine manufacturer. Expansion and flexible elements shall be capable of absorbing vibration from the engine and compensation for thermal expansion and contraction.

2.10.2 Exhaust Muffler

A chamber type exhaust muffler shall be provided. The muffler shall be constructed of welded steel and designed for outside mounting. Eyebolts, lugs, flanges, or other items shall be provided as necessary for support in the location and position indicated. Pressure drop through the muffler shall not exceed the recommendations of the engine manufacturer. Outside mufflers shall be zinc coated or painted with high temperature 400 degrees F resisting paint. The muffler and exhaust piping together shall reduce

SECTION 26 32 14.00 10 Page 13 the noise level to less than the maximum acceptable level listed for sound limitations in paragraph SOUND LIMITATIONS.

2.10.3 Exhaust Piping

Horizontal sections of exhaust piping shall be sloped downward away from the engine to a condensate trap and drain valve. Changes in direction shall be long-radius. Exhaust piping, mufflers and silencers installed inside any building shall be insulated in accordance with paragraph THERMAL INSULATION and covered to protect personnel. Vertical exhaust piping shall be provided with a hinged, gravity operated, self-closing, rain cover.

2.11 EMISSIONS

The finished installation shall comply with Federal, state, and local regulations and restrictions regarding the limits of emissions.

Submit a certification from the engine manufacturer stating that the engine exhaust emissions meet federal, state, and local regulations and restrictions specified. At a minimum, this certification shall include emission factors for criteria pollutants including nitrogen oxides, carbon monoxide, particulate matter, sulfur dioxide, non-methane hydrocarbon, and for hazardous air pollutants (HAPs).

2.12 STARTING SYSTEM

The starting system for engine generator sets used in non-emergency applications shall be as follows.

2.12.1 Controls

An engine control switch shall be provided with functions including:

run/start (manual), off/reset, and automatic mode. Start-stop logic shall be provided for adjustable cycle cranking and cool down operation. The logic shall be arranged for manual starting and fully automatic starting in accordance with paragraph AUTOMATIC ENGINE-GENERATOR SET SYSTEM OPERATION. Electrical starting systems shall be provided with an adjustable cranking limit device to limit cranking periods from 1 second up to the maximum duration.

2.12.2 Capacity

The starting system shall be of sufficient capacity, at the maximum outdoor summer temperature specified to crank the engine without damage or overheating. The system shall be capable of providing a minimum of three cranking periods with 15-second intervals between cranks. Each cranking period shall have a maximum duration of 15 seconds.

2.12.3 Functional Requirements

Starting system shall be manufacturers recommended dc system utilizing a negative circuit ground. Starting motors shall be in accordance with

SAE ARP892.

2.12.4 Battery

A starting battery system shall be provided and shall include the battery, battery rack, intercell connectors, and spacers. The battery shall be in

SECTION 26 32 14.00 10 Page 14 accordance with SAE J537 . The battery shall be lead-acid type, with sufficient capacity, at the minimum outdoor winter temperature specified to provide the specified cranking periods. Valve-regulated lead-acid batteries are not acceptable.

2.12.5 Battery Charger

A current-limiting battery charger, conforming to UL 1236 , shall be provided and shall automatically recharge the batteries. The charger shall be capable of an equalize charging rate for recharging fully depleted batteries within 24 hours and a float charge rate for maintaining the batteries in prime starting condition. An ammeter shall be provided to indicate charging rate. A timer shall be provided for the equalize charging rate setting. A battery is considered to be fully depleted when the output voltage falls to a value which will not operate the engine generator set and its components.

2.12.6 Starting Aids

The manufacturer shall provide one or more of the following methods to assist engine starting.

2.12.6.1 Jacket-Coolant Heaters

A thermostatically controlled electric heater shall be mounted in the engine coolant jacketing to automatically maintain the coolant within plus or minus 3 degrees of the control temperature. The heater shall operate independently of engine operation so that starting times are minimized.

The control temperature shall be the temperature recommended by the engine manufacturer to meet the starting time specified.

2.13 GOVERNOR

Each engine shall be provided with a governor which maintains the frequency within a bandwidth of the rated frequency, over a steady-state load range of zero to 100 percent of rated output capacity. The governor shall be configured for safe manual adjustment of the speed/frequency during operation of the engine generator set, without special tools, from 90 to 110 percent of the rated speed/frequency, over a steady state load range of zero to 100 percent of rated capacity. Isochronous governors shall maintain the midpoint of the frequency bandwidth at the same value for steady-state loads over the range of zero to 100 percent of rated output capacity.

2.14 GENERATOR

Each generator shall be of the synchronous type one, conforming to NEMA MG 1, equipped with winding terminal housings in accordance with NEMA MG 1, equipped with an amortisseur winding, and directly connected to the engine. Insulation shall be Class H. Generator design shall protect against mechanical, electrical and thermal damage due to vibration, 25 percent overspeeds, or voltages and temperatures at a rated output capacity of 100 percent. Generator ancillary equipment shall meet the short circuit requirements of NEMA MG 1. Frames shall be the drip-proof type. Submit each generator KW rating and short circuit capacity (both symmetric and asymmetric).

SECTION 26 32 14.00 10 Page 15

2.14.1 Current Balance

At 100 percent rated load, and load impedance equal for each of the three phases, the permissible current difference between any two phases…