ARRA Roof Final Specs 9-28-2009.pdf

General Services Administration Public Buildings Service

Denver Federal Center Lakewood, Colorado

RECOVERY

Roof Mounted Grid Tied PV System, Buildings 20, 56, 810

Project # VCO 00019

Project Specifications

Project Drawings: Are considered “Sensitive But Unclassified” information. To obtain a compact disk that includes an electronic copy of the project drawings follow procedure in Section 00800

Special Contract Requirements.

Table of Contents

Pages

Section 1: General Requirements…………………………………………………… 5

Section 2: SOW, Design Build Guidance Criteria Roof Mounted Utility-Interactive Photovoltaic System……………………………………………… 15

Section 3: SOW, Design Build Guidance Criteria Cool Roof Systems…………………………………………………………………………….. 6

Structural Analysis Roof, Building 810, 41, 20, 56, 1-A, Findings and Recommendations …………………………………………………………………………………. 21

Asbestos Test Results, Roof 20 and 56 ……………………………………………………. 12

Dig Permit ……………………………………………………………………………………………… 7

Environmental Procedures

90-Day Storage Area: Emergency Hazardous Waste Spill Response………..…. 4

Asbestos Management……………………………………………………………… 2

Chemical Storage & Disposal……………………………………………………… 2

Construction, Excavation, & Hazardous Waste Management …………………. 6

Excavation Permit ………………………………………………………………….. 2

Greening Building Maintenance – Green Purchasing …………………………….. 3

Pre-Demolition Inspection …………………………………………………………. 1

Recycling ……………………………………………………………………………. 4

Spill Response ………………………………………………………………………. 1

Stormwater Management …………………………………………………………… 4

Water Incursions/Intrusions (Indoor Water Line Breaks) ……………………….. 4

Section 1

General Requirements

Project Location Buildings 20, 56 and 810 Denver Federal Center, Lakewood, Colorado.

Project Points of Contact Diane Byers, Contracting Officer

Phone: 303-236-8000 Ext. 5054 Fax: 303-236-5328 Douglas Porter, Contracting Officer’s Representative

Phone: 303-236-8000 Ext. 5027 Cell: 303-483-3522

Project Duration Once CONTRACT AWARD has been made, the Contractor has 330 calendar days to complete the project. Extensions will be granted for unforeseen conditions and other factors outside of the Contractor’s control.

Project Scope The project will involve installing photovoltaic systems on the roofs of three buildings. Also included is the replacement of applicable portions of the existing roofs. See attached specifications for specific details.

All work shall comply with codes and standards applicable to each type of work through the course of this project. Contractor shall also comply with the requirements of GSA Build Green Standards, and

PBS P-100.

Environmental Issues Existing roofing materials have been tested for asbestos and were found to be non-ACM. See test results.

There are environmental issues at the building site. The soil surrounding the building may contain contamination. See attached Dig Permit and Environmental Procedures for actions and procedures to follow when excavation is required to install underground conduit and equipment pads.

Submittals All products specified are to establish a standard of quality. Submittal response by the government shall be 14 calendar days or less. See specifications for specifics of submittal requirements.

Equipment

The Contractor shall provide all equipment associated with the entire project, operate in a safe manner and adhere to all OSHA and GSA standards.

Equipment and Material Storage The Contractor shall provide and store all equipment, the materials specified above, and any other materials required to complete the project. The materials are required to be kept clean and dry throughout the duration of the project.

Material Removal The Contractor shall provide dumpsters as necessary to handle any demolition or excess materials from the project. The location of these dumpsters will need to be coordinated with GSA at the start of the project. A chute will be required for transporting roof demolition debris to dumpsters. During the ‘chute’ use, provide water spray as needed to control dust. The Contractor shall be responsible for the transportation of the waste material to a landfill as well as the disposal costs. The Contractor shall not

General Requirements Page 2 of 6 stockpile demolition debris for more than 48 hours. See also “Waste Management” and “Disposal” for further requirements.

Contractor Use of the Premises During the period of the project, the Contractor will have access to the site only during business hours of Monday Through Friday, 6 AM to 6 PM. No on-site work shall be performed outside these hours or on holidays unless necessary to recover planned schedule or otherwise directed by the Contracting Officer. The Contractor will need to coordinate with the government Contracting Officer to arrange access to the Denver Federal Center. The Contractor shall make every effort to cause a minimum of damage to parking lots, any other paved areas, any items that need to be moved during the course of the project, and any areas not included in this scope of work. Any damage caused will be repaired at the Contractor’s expense. The unpaved staging areas shall be restored following use by grading to return to original surface condition and by seed and mulch applied during fall, winter or spring. Seed mix requirements will be provided by GSA.

Progress Meetings The Contractor shall schedule weekly meetings with the GSA and subcontractors once on-site work begins. The Contractor shall keep meeting minutes and distribute copies at the following meetings. The meeting agenda will include the following as a minimum: Approval of previous meeting, review of work progress, field observations, problems and decisions, identification of problems which impede planned progress, review of submittals schedule and status of submittals, maintenance of progress schedules, planned progress during the succeeding work period.

Sanitary Facilities Provide and maintain temporary toilet facilities in accordance with State Health Department and GSA requirements. These shall be located at staging areas or roof demo areas.

Electricity and Water The GSA will pay for electricity and water during the course of this project. The Contractor is responsible for making connections to the existing systems. Temporary electrical work shall meet the requirements of NFPA 70-1996 (NEC), Article 305. When temporary connections are removed, restore existing utility services to their original condition.

Telephone Telephone service is not available on-site for the Contractor’s use.

Motorized Equipment No motorized equipment, hand-held or wheeled, shall be used inside any building. Roof equipment shall be approved by GSA prior to use.

Utility Outages and Locates No utility outages will be approved without the written consent and approval of the Contracting Officer’s

Representative. Requests for utility outages (electrical, telephone, gas, water, chilled water, hot water, fire sprinkler system, and fire detection system) must be received 14 calendar days before the outage date. Planned outages to the 13.8 kV medium distribution system will need to be planned 21 calendar days prior to requested outage. The outage will be for either the ‘X’ or ‘Y’ loop as the other loop needs to be kept in service.

The Contractor shall be responsible for locating all utility lines shown on available drawings and other lines subsequently discovered by the utility locates performed by the Contractor. If utilities are to remain in place, use caution during earthwork operations to avoid impact. The Contractor shall be responsible for any damage to the located utilities if found in the located position, or as indicated on the available drawings.

Contacts for Utility Locates:

General Requirements Page 3 of 6

DFC SERVICE CENTER: Utility Notification Center of Colorado @ 1-800-922-1987 for the following entities Xcel Gas lines and US West Phone lines:

High Voltage- Mandatory Contractor Sturgeon Electric Company Mr. John Carnell, Senior Contracting Officer’s Representative Office Phone 303-227-6995 Cell Phone 303-478-2496 There is a charge for this locate.

Two Hour minimum- approximately $90.00 per hour, $130.00 per hour for overtime

Government Communication Lines- Mandatory Contractor Premisys Support Group Mr. Phil Martinez Office Phone 303-358-7068 There is a charge for this locate. (Contact Contracting Officer’s Representative for more information)

Contractor’s Field Office The Contractor may provide an office for their own use. Location shall be in designated staging areas.

Storage Sheds Temporary weather tight sheds or other covered facilities shall be used for the storage of materials subject to weather damage. The number and size of structures shall be subject to the Contracting Officer’s approval. Sheds shall be stored in staging areas.

Protection of Public The building site will continue to be used by tenants. The Contractor shall fence, barricade, or otherwise block off the immediate work area to prevent unauthorized entry. The Contractor shall illuminate barricades and obstructions at night and maintain safe building access and egress for tenants. It is recommended the contractor fence his staging areas as needed.

Housekeeping The project site shall be kept in a neat, orderly, and safe condition at all times. The Contractor shall provide enough containers for collecting construction debris and construction materials to be recycled.

The Contractor shall wet down dry materials and rubbish to prevent blowing dust and keep volatile wastes in covered containers.

Disposal Unless otherwise specified, all removed material becomes the property of the Contractor and shall be disposed of outside Government facilities and land. The Contractor shall dispose of refuse at least monthly, in a legal manner, at a public or private dumping area. Document and provide to the Contracting Officer the quantity of materials disposed of through recycling and through sanitary landfills (cy or tons as appropriate). See also “Waste Management”.

Waste Management The GSA has established that this project shall generate the least amount of waste possible. The

Contractor shall employ processes which ensure the generation of as little waste as possible and avoid the generation of waste due to over-packaging, error, poor planning/layout, breakage, contamination, damage from weather, etc. Of the inevitable waste that is generated, as many of the waste materials as economically feasible shall be reused, salvaged, or recycled. Waste disposal to a landfill shall be minimized to the greatest extent possible. Cardboard waste from packing shall not be sent to landfills but shall be transported to the cardboard bailers located in either Building #20 or #41 where the Contractor shall bail this material for recycling by GSA. Wood pallets shall be recycled. Miscellaneous metal waste shall be at a minimum recycled as ‘scrap metal’ by the Contractor. See also “Disposal” for record keeping requirements and Environmental Procedures.

General Requirements Page 4 of 6

Transportation and Deliveries The Contractor shall arrange deliveries of materials in accordance with construction schedules and coordinate with the COR to avoid conflict with other tenants and other work conditions at the site. The Contractor may use available loading docks near the construction site.

Cleaning Before scheduling the final inspection, the Contractor shall accomplish six items: (1) Remove all tools, equipment, surplus material, and rubbish; (2) Restore or refinish, to original condition, surfaces that are damaged due to the work of this contract; (3) Remove grease, dirt, stains, foreign materials, and labels from finished surfaces; (4) Thoroughly clean building interiors; (5) Pick up all construction debris from the site; and (6) Before final inspection, thoroughly clean project site ready for use.

Painting/Staining All painting, staining, or other activity which may cause noxious or undesirable fumes must be performed after normal working hours. The use of paint or stain that does not generate odors is preferred and may be required if the space will be occupied the following day.

Project Record Drawings Maintain one complete full-size set of contract drawings and one full-size set of vendor supplied drawings. Clearly mark changes, deletions, and additions using GSA CAD Standards to show actual construction conditions. Show additions in red, deletions in green, and special instructions in blue print.

Provide to Contracting Officer’s Representative. See other specification sections for additional requirements.

Substantial Completion and Final Inspection When project, or designated portion of project is complete, request a final inspection. Upon receipt of request that project is substantially complete, the Contracting Officer will proceed with the inspection within ten (10) calendar days of receipt of request or will advise the Contractor of items that prevent the project from being designated substantially complete.

Recovery Project Signage

Install an exterior mounted project sign at Buildings 20, 56 and 810. Each sign shall be 12 feet by 6 feet, constructed of a durable, weather resistant material, properly and securely framed and mounted where indicated by GSA. Sign content will be provided by GSA at a later date but will include as a minimum the following: name of building, Contractor’s name, U.S. General Services Administration – Public Buildings Service, Barack Obama- President of the United States, (Administrator’s name)- Administrator, GSA, (Name) Commissioner, PBS, Regional Administrator’s name), Region 8 Administrator.

Electronic Project Management

Meridian Proliance®, a secure, web-based, electronic project management (ePM) system is to be used to accommodate the information needs of all project participants. The ePM system shall be implemented at the beginning of the Design Stage and maintained continuously through completion of the Design and Construction Stages. All communications among the major parties involved in the execution of the project are to be captured and recorded in the ePM system. User licenses and training shall be provided for the contractor’s team requiring access to the ePM system.

The Contractor shall use the ePM system for all necessary communications with other major parties involved in the project. Electronic storage and transmission of information via the ePM system shall be compliant with the provisions of the Document Security per PBS GSA 3490.1. , available at:

https://propertydisposal.gsa.gov/RedinetDocs/uploadedFiles/marketing/PBS%20Directive%203490.1% 20Security%20Waiver.pdf Design and Construction Drawings may not be posted on the website.

https://propertydisposal.gsa.gov/RedinetDocs/uploadedFiles/marketing/PBS%20Directive%203490.1%20Security%20Waiver.pdf https://propertydisposal.gsa.gov/RedinetDocs/uploadedFiles/marketing/PBS%20Directive%203490.1%20Security%20Waiver.pdf

General Requirements Page 5 of 6

GSA Submittal Processing Prepare and submit a submittal schedule in accordance with project requirements. The Design Builder is to perform review of submittals for compliance with the project criteria. In the submittal schedule, identify all submittals to be reviewed by GSA. GSA may also request the opportunity to review various additional submittals. GSA and tenant reviews do not relax the Contractor’s responsibility to comply with criteria established in the RFP and other contract references. Transmit all required submittals to GSA. All submittals shall be processed using the ePM system in accordance with procedures developed and approved by GSA. Ensure that all subcontractors understand, agree to, and conform with their respective roles, responsibilities, and timeliness requirements for submittal processing.

Clarifications/Requests for Information/Change Orders Using the Proliance ePM system, and in accordance with procedures developed and approved by GSA, promptly submit to GSA a written request for information (RFI) to request clarification of any apparent conflicts, ambiguities, or omissions in the DB contract requirements. Ensure that all subcontractors understand, agree to, and conform with their respective roles, responsibilities, and timeliness requirements for RFI processing.

Each RFI shall include a specific description of the issue requiring clarification, citing the specific related contract documents requiring clarification. RFIs shall only be submitted after performing due diligence to confirm that the contract requirements in question are in fact unclear or otherwise inadequate.

Upon receipt of the response to each RFI submitted, coordinate the response with all involved subcontractors to ensure understanding and appropriate action.

General Requirements Page 6 of 6

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Design Build Guidance Criteria Roof Mounted Utility-Interactive Photovoltaic System Page 1 of 15

Section 2

Statement of Work Design Build Guidance Criteria

Roof Mounted Utility-Interactive Photovoltaic System

1. PROJECT IDENTIFICATION

1.1. Project: Roof Mounted Grid Tied PV System, Buildings 20, 56, 810

1.2. Buildings: 20 , 56, 810

1.3. Location: Denver Federal Center, One Denver Federal Center, Lakewood, CO

2. BACKGROUND

2.1. Objective. The contractor shall provide a total “turnkey” project including design, manufacturing and installation services for the installation of a rooftop mounted utility-interactive photovoltaic system with the following minimum sizes:

300 kW DC Building 20 and 300 kW DC Building 56, and the remainder on Building 810. The combined overall capacity of all three roofs shall produce a minimum of 4,115,000 kWh per year, approximately 3 megawatts DC. Larger capacity systems that produce more than the minimum are an alternative for these roofs and will be evaluated but the proposed system shall not produce more than 4,900,000 kWh per year. Buildings 20 and 56 will be required to remove the existing roof system and replace it with either an integrated roof/PV system or a new roof with PV system installed. See roofing specification for these requirements. This project shall meet all technical requirements of this Statement of Work and other specifications included that apply.

2.2. Scope: The contractor shall perform all professional services as necessary to provide GSA with a complete design package including the requirements outlined in this Statement of Work. The design package shall include specifications, calculations and drawings which will be turned over to GSA.

After approval by GSA of the final design package, the contractor shall provide all necessary construction to successfully install the photovoltaic system.

2.2.1. Design Guidelines. Develop a design for a new photovoltaic system at

Buildings 20, 56, and 810. See attached drawings indicating the existing roof layout and existing roof structure plans. These drawings are meant for informational purposes only and must be field verified by the contractor.

2.2.1.1. The following performance criteria shall be met:

• Mounting system shall limit roof penetrations and shall be either building integrated roof PV, fully ballasted or membrane sealed roof mounting.

• Conduit penetrations shall be minimized.

• The Contractor shall provide a roof-

Photovoltaic System Page 2 of 15 mounted system with a fixed tilt or flat and an orientation that maximizes annual energy production.

• Power provided shall be either 480V or 13.8 kV three phase compatible with the onsite distribution system. See drawings for options for connection voltage and location. Estimated energy delivery shall be provided for each building, for each month of the year and total for the year at the delivered voltage ( 480V or 13.8 kV). The STC power value will be entered into PVWATTS http://rredc.nrel.gov/solar/codes_algs/PVWATTS/version1/ to determine estimated energy delivery in kWh. A suggested DC to AC De-rate factor is 0.77, however more efficiently engineered and designed systems are encouraged. Support the De-rate factor’s used.

• All PV hardware components shall be either stainless steel or aluminum. PV Structural components shall be corrosion resistant (galvanized steel, stainless steel, composites, or aluminum).

• The Photovoltaic panel system including supports and power conductors shall not interfere with roof drains, expansion joints, air intakes, existing electrical and mechanical equipment, existing antennas, and planned areas for future installation of equipment shown on drawings.

• The design shall meet the local, state and federal criteria for wind, snow and seismic loads.

2.2.2. Construction. Perform all construction necessary for the successful installation of the system based upon the design generated from 2.2.1.

2.3. Technical Requirements and Reference Materials

2.3.1. Code Compliance – Installation and equipment shall comply with applicable building, state, seismic, structural and electrical codes. All products that are listed, tested, identified, or labeled by UL, FM, ETL, or other National Recognized Testing Laboratory shall be used when available. Non-listed products are only permitted when listing does not exist.

Non-listed products must be identified as such in all submittals.

The contractor shall provide materials that are recyclable, contain recycled materials, and that are EPA or Energy Star Rated if they are available on the market.

PBS P100 “Facilities Standards for the Public Buildings Service” (March 2005) Compliance overall is required, but specifically the electrical and roofing sections should be carefully adhered to. These standards make several references to the National Roofing Contractors Association, SMACNA and several other national codes. All referenced codes shall also be adhered to in all aspects.

The publications listed below form a part of this document to the extent required to meet the intent of the design:

http://rredc.nrel.gov/solar/codes_algs/PVWATTS/version1/

Photovoltaic System Page 3 of 15

• PV Interconnection Standard 929-2000

• NEC Sec 720, also Article 690, 90-2 - Electrical installations of PV

Equipment. Recommended installation practices (March 2001)

• IEEE 1262 – PV Module Qualification for performance & reliability

• UL 1703 Flat – Plate PV Modules and Panels

• UL 1741 – Standard for Static Inverters and Charge Controllers for

Use in Photovoltaic Power Systems

• FM Approved – Fire Protection tests for Solar Component products

Other technical codes that shall apply include:

• AMSE PTC 50 (solar PV performance)

• ANSI Z21.83 (solar PV performance and safety)

• NFPA 853 (solar PVs near buildings)

• NFPA 70 (electrical components)

• NEC

• IEEE 1547 (interconnections)

• ASCE/ SEI-7 – American Society of Civil Engineers – “Minimum

Design Loads for Buildings and Other Structures”.

• NRCA – National Roofing Contractors Association

2.4. Roles and Responsibilities:

2.4.1. Contractor. The Contractor is required to provide:

• Design Concepts

• Construction Documents and engineering calculations that are

Signed and Sealed by a licensed architect / engineer

• Submittals for Materials and Products

• Construction materials and labor

• Design and Construction Supervision / Contract Management

• Materials / Equipment

• Quality Control Plan

• Safety Plan

• Inspections and Tests

• Manuals (Design Calculations, Operation/Maintenance, Shop

Drawing, etc.)

• Commissioning of systems

• Training of Building Operating Staff

• Operation and Maintenance during first year

• Web Based Monitoring System for 20 years

2.4.2. Government. The Government will review for approval:

• Review / comment on design submittals, including the Quality

Control Plan

• Inspection / Test Witnesses to verify attainment of performance requirements

Photovoltaic System Page 4 of 15

• Progress payments for design / construction shall be as agreed to in the approved schedule of values.

3. CONCEPT DRAWINGS AND SPECIFICATIONS

3.1. System Placement. The placement shall be shown in the concept drawings provided to the government with the technical proposal.

3.2. Concept Drawings. The contractor shall provide the government with concept drawings with the technical proposal. The drawings must indicate the proposed location of the PV array and access points along with a one-line electrical diagram showing inverters, transformers, meters, and interconnection locations.

All drawings shall be submitted with dimensions shown in English units.

3.3. Concept Information. The technical proposal shall include major equipment information, proposed installation/interconnection information, and performance characteristics of the system per each building. Include indication of compliance with Buy American Act. All products shall comply with the technical requirements shown under section 7, “Technical Requirements”. At a minimum, the proposed concept information shall include:

Equipment Information:

1. Estimated Power Rating Per Module

2. Estimated Number of Modules

3. Total Array Output

4. Number of Inverters

5. Inverters Continuous AC Rating

6. Estimated Total Inverter Output

7. Estimated Inverters Peak Efficiency and efficiency at various output levels

8. Mounting structure layout including access points

9. Estimated number of roof penetrations per 1,000 sf

Installation Interconnection Information:

1. Solar Electric Array Orientation (degrees) relative to the building structure

2. Solar Electric Module Tilt (degrees)

3. System Type and Mode of Operation (Utility Interactive)

Performance Characteristics

1. Estimated kWh/month per building (shown over a 12 month period)

Interconnection Agreement

1. Provide confirmation that the PV systems will be designed to comply with XCEL Energy’s Solar Rewards program requirements.

4. DESIGN SERVICES

Design Services for this project shall require a 25% schematic design submission (25%), a 75% Design Development Submission, a 100% Check Set Submission and a Construction

Photovoltaic System Page 5 of 15

Document Submission. A final set of as-built drawings shall also be provided to the Government. These submissions shall be delivered to the Government based on the project schedule submitted and approved by GSA. The design package shall include the following:

4.1. Post Award Conference: Within 21 calendar days after receipt of the contract award. The meeting will be attended by GSA team members and the contractor’s personnel. At a minimum, the prime contractor’s project manager and foreman, the primary designer, and a representative of any subcontractor performing over 25% of the work must attend. The meeting will be held at the project location, location to be determined. The purpose of the meeting will be to discuss the contractor’s plan for completing the design and construction. A walk through of the site will occur at the end of the meeting.

4.2. Specifications: A full set of specifications shall not be required for this project.

However, specifications which express all information that demonstrates sufficient detail so as to direct the construction work outlined in this Statement of Work shall be required. The specifications package shall be coherent enough that any contractor not familiar with the project would be able to construct the project design. The specifications shall include all equipment information, proposed installation/interconnection information, and performance characteristics of the system.

4.2.1. All drawings, estimates, calculations, and specifications shall be in English units.

4.2.2. The contract shall take into account a construction plan producing a minimum disruption of day-to-day activities, utilities, services, etc.

4.3. Construction Drawings:

4.3.1. Provide all contract drawings required in accordance with Section 7, “Technical Requirements”. Provide drawings for each discipline required (architectural, structural, electrical, etc.), with separate plans for new work and demolition as well as special types of drawings where necessary, such as enlarged plans, equipment curbing and flashing details, roof penetration details etc. Drawings shall clearly distinguish between new and existing work.

4.3.2. Each drawing shall indicate project title, project number, building name, building number, building address, A/E firm, A/E's address and/or phone number, contract number, drawing title, drawing type, drawing number, and key plan. A cover sheet shall be provided and shall include a list of the drawings, legend, vicinity map, and location map in addition to all items required for each drawing. Each A/E submission shall be clearly dated and labeled (e.g. 75% Design Development Submission, 100% Check Set Submission, Construction Document Submission, As-Built Drawings, etc.).

Each drawing sheet submitted shall include a graphic scale in the lower right-hand portion of the sheet. The final set shall be stamped by a registered engineer and/or registered architect for the state in which the building is

Photovoltaic System Page 6 of 15 located. At a minimum, the following drawings are required:

• Site Plan Including Utility Locations and Connections – shall show staging and phasing requirements.

• Electrical Plans – including Single Line Diagram and Utility Interconnection.

• Electrical Details.

• Roof Plan – showing the full layout of the system and detailing any obstacles that must be permanently or temporarily removed or relocated.

• Any drawings that may be required to install a complete project.

• Water proofing details

4.3.3. The Contract Documents shall sufficiently define the Statement of Work and shall stand on their own.

4.3.4. Specifically address the means to keep the existing building accessible and operational by means of relocation and / or phasing.

4.4. Calculations: The contractor will provide the following calculations.

4.4.1. System Electrical Calculations: provide with design development and again with 100% check set.

• PVWATTS Calculation.

• System Energy Production Calculation showing estimated monthly and yearly energy output for each building.

4.4.2. Roof structural loading calculations. These calculations shall specifically address roof loading from the PV array and confirmation that the loading does not exceed existing roof framing capacity as determined by your analysis.

The documents included in this contract include a preliminary Structural Analysis Roof, Buildings 810, 41, 20, 56, 1-A Finding and Recommendations.

This document provides some preliminary indications on the existing roofs capability to carry additional loading and is intended to assist during the proposal process in developing your concept design. It is not intended to alleviate the need to do array specific structural calculations during the subsequent design phases.

4.5. Registration Seals: Each final working drawing and each submitted specification and calculation document shall be signed by, bear the seal of, and show the State Certificate Number of the Architect and / or Engineer who prepared the document and / or is responsible for its preparation.

5. DESIGN SUBMISSIONS

5.1. Design Reviews: For each design / drawing submissions, the Government reserves the right to make comments and request changes after the receipt of the submission. Reviews will be made by Government staff. As part of its review, the Government may offer submission reviews to local code officials. The

Photovoltaic System Page 7 of 15

Government shall provide review comments within fourteen (14) calendar days of receipt of the 75% Design Development Submission and the 100% Check Set Submission.

If the contractor believes that any Government design comments or requested changes will result in a change in the contract cost, they shall notify the Contracting Officer and Contracting Officer’s Representative within seven (7) calendar days of receiving the comment(s) and provide detail cost estimate of anticipated contract modifications.

5.2. Purpose: The Government will review Contractor design submissions to verify adherence to contract requirements. Design reviews by the Government are not to be interpreted as resulting in an approval of the Contractor's apparent progress toward meeting contract requirements but are intended to discover any information which can be brought to the Contractor's attention which might prevent errors, misdirection, or rework later in the project. The Contractor shall remain completely responsible for designing, constructing, operating and maintaining the project in accordance with the requirements of this Statement of Work.

5.3. Resolution of Comments: The Contractor shall respond to all design review comments in writing, indicating one of the following: (1) Adoption and action taken, (2) Adoption with Modifications and action taken, (3) Alternative Resolution and action taken, or (4) Rejection. In cases other than unqualified adoption, the Contractor shall provide a statement as to why the reviewer's comment is inappropriate. Rejection items shall not go forward to the construction phase until adequate resolution to the rejected item has been approved by the Contracting Officer. Design review comments shall not relieve the Contractor from compliance with terms and conditions of this contract. Contractor's comment resolution shall be transmitted to the Government within seven (7) calendar days of comment receipt and incorporate discussions from the scheduled design comment review meetings.

6. UTILITY INTERCONNECTION AGREEMENT

6.1. The Contractor is responsible preparing required submissions for obtaining the interconnection agreement from the utility. GSA will sign the interconnection agreement, not the Contractor. Reference link:

http://www.xcelenergy.com/Residential/RenewableEnergy/Solar_Rewards/Pages/ LargeProgramDetails.aspx

7. QUALITY CONTROL PLAN (QCP)

7.1. Content: For each performance and installation requirement, the QCP shall identify: item / system to be tested, exact test(s) to be performed, measured parameters, inspection/testing organization, and the stage of construction development when tests are to be performed. Each inspection/test shall be included in the overall construction schedule. The Contractor is not relieved from required performance tests should these not be included in the plan.

http://www.xcelenergy.com/Residential/RenewableEnergy/Solar_Rewards/Pages/LargeProgramDetails.aspx http://www.xcelenergy.com/Residential/RenewableEnergy/Solar_Rewards/Pages/LargeProgramDetails.aspx

Photovoltaic System Page 8 of 15

The QCP is intended to document those inspections / tests necessary to assure the Government that product delivery, quality and performance are as required. It also serves as an inspection coordination tool between the Contractor and the Government. Examples of these inspections/tests are the final test / inspection for overall performance compliance of the system. Results from tests and inspections shall be submitted within 24 hours of performing the tests and inspections.

7.2. Submissions: The QCP shall be prepared and submitted within 21 calendar days of the post award conference meeting and prior to any construction on-site.

The QCP may be rejected as incomplete and returned for resubmission if there is any performance, condition or operating test that is not covered therein.

7.3. Updating: During construction, the Contractor shall update QCP if any changes are necessary due to any changes or schedule constraints. The Government's Contracting Officer's Representative (COR) shall be notified immediately of any schedule and/or procedural changes.

8. SOLAR ELECTRIC MODULE ARRAY

8.1. Photovoltaic Modules

8.1.1. PV Modules shall be UL Listed and shall be properly installed according to manufacturer’s instructions, NEC, and as specified herein.

8.1.2. The PV modules shall be installed such that the maximum amount of sunlight available year-round on a daily basis should not be obstructed. All projects must include documentation of the impact from any obstruction on the seasonal or annual performance of the solar electric array. This analysis can be performed by using the New Jersey Clean Power Estimator on the program website www.njcep.com or similar.

8.1.3. The solar electric system shall produce the minimum annual energy output. If the system is proposed to produce more than the minimum required energy output to reduce the cost per delivered kWh then the system shall produce the “proposed” energy. The output will be adjusted if the actual yearly solar insulation received is less than that indicated by PVWATTS. A normalizing calculation will be made to correct the output, so a contractor is not penalized for an extremely cloudy year.

8.1.4. System may be constructed using tilted or flat solar photovoltaic system.

The system must still be shown to perform as required.

8.1.5. System wiring shall be installed in accordance with the provisions of the

NEC.

8.1.6. All modules installed in a series string shall be installed in the same plane.

8.1.7. PV modules shall have a 25-year limited warranty that modules will generate no less than 80% of rated output under STC. PV modules that do http://www.njcep.com/

Photovoltaic System Page 9 of 15 not satisfy this warranty condition shall be replaced.

8.1.8. Panel installation design shall allow for the best ventilation possible of panels to avoid adverse performance impacts.

8.1.9. Ten (10) extra PV panels or two extra thin film membrane units shall be provided for each building.

8.1.10. Warranty: Provide a panel manufacturer’s warranty will provide as a minimum: No module will generate less than 90% of its specified minimum power when purchased. PV modules shall have a 25-year limited warranty guarantying a minimum performance of at least 80% of the original power for at least twenty (20) years. Measurement made under actual installation and temperature will be normalized to standard test conditions using the temperature and coefficients published in the module specifications.

8.2. Inverter and Controls

8.2.1. Each inverter and associated controls shall be properly installed according to manufacturer’s instructions.

8.2.2. The inverter shall be certified as compliant with the requirements of IEEE

929 for small photovoltaic systems and with UL 1741 specifically for utility grid interconnection of PV arrays. The Inverter shall have at a minimum the following features:

• UL/ETL Listed

• Peak Efficiency of 96% or higher

• Inverter shall have operational indicators of performance and have built in data acquisition and remote monitoring.

• The inverter shall be capable of parallel operation with the existing

AC power. Each inverter shall automatically synchronize its output waveform with that of the utility upon restoration of utility power.

• Inverters shall be have UL 1741 Certified, for approved list of inverters see http://www.gosolarcalifornia.org/equipment/inverter.php

8.2.3. The system should be equipped with the following visual indicators and/or controls:

• Operating mode setting indicator

• AC and DC overcurrent protection

• Operating status indicator

8.2.4. Warning labels shall be posted on the control panels and junction boxes indicating that the circuits are energized by an alternate power source independent of utility-provided power.

http://www.gosolarcalifornia.org/equipment/inverter.php

Photovoltaic System Page 10 of 15

8.2.5. Operating instructions shall be posted on or near the system, and on file with facilities operation and maintenance documents.

8.2.6. Provide detailed Lock Out / Tag Out instructions for all equipment.

8.2.7. Power provided shall be compatible with on site electric distribution systems.

• Install inverters and control panels in most optimum locations with appropriate environmental protection. Roofs may be used if structurally sufficient. If inverters are mounted outside they shall be shaded from direct sun from 12 to 4 PM in the months of June - August.

8.2.8. The inverter and system shall utilize an astronomical timer or other means to shut down the inverter during night time to avoid energy usage at night.

8.2.9. Warranty: a ten year manufacturers warranty shall be provided.

8.3. Control Panel to Solar Electric Array Wire Runs

8.3.1. Areas where wiring passes through ceilings, walls or other areas of the building shall be properly restored, booted, sealed and returned to its original condition.

8.3.2. All interconnecting wires shall be copper.

8.3.3. Thermal insulation in areas where wiring is installed shall be replaced to

“as found or better condition.” Access doors to these areas shall be properly sealed and gasketed.

8.3.4. Wiring connections shall be properly made, insulated and weather-protected.

8.3.5. All power wiring shall be attached to the system components by the use of strain reliefs or cable clamps, unless enclosed in conduit.

8.3.6. All outside wiring shall be rated for wet conditions and/or encased in rigid or aluminum conduit. The last three feet may be liquid tight to allow for movement and maintenance.

8.3.7. Insulation on any wiring located in areas with potential high ambient temperature shall be rated at 90° C or higher.

8.3.8. All wiring splices shall be contained in UL-approved junction boxes.

8.3.9. All junction boxes shall be aluminum or stainless steel with hinged covers and NEMA 3R or better.

8.4. PV Monitoring

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8.4.1. The PV systems installed shall provide for monitoring by both GSA on their advanced metering network as well as by the general public on a web based site. The public site is intended for education and outreach regarding renewable energy production and information on avoided green house gas production. The public site shall be maintained for ten years.

8.4.2. Monitor by an IP addressable device and displayed graphically in a user-friendly manner the following parameters:

• DC voltage

• DC current

• DC power

• AC power

• AC energy

• Solar irradiance

• PV cell temperature

• Ambient air temperature

• Show status of all equipment

• Provide electrical one line showing operation and performance of all equipment

Data shall be available both in real time and archived in fifteen-minute averages. All monitoring hardware and monitoring equipment shall be provided by the contractor.

System shall also include metering for remote data collection and display on vendor provided web site of system performance. System performance shall allow display during different monitoring periods from 1 hour to 1 year.

8.4.3. Provide networking equipment, engineering, programming, wiring, and software to allow remote connection by GSA to the local area network.

8.4.4. GSA Meter shall be a solid state advance meter with the following features: non-volatile memory capable of storing 16 parameters for 30 days, using Ethernet port, accuracy meeting ANSI C.12.16, TCP/IP communication, and Modbus IP protocol. The electrical metering shall be Siemens 9350 or Schneider Electric ION 7350 or better advanced electrical meter which is compatible with the Region Eight Win PM software. All electric meters shall be installed with shorting bars to use to short induced current from the current transformers to ground and to facilitate repair and replacement without the need for an outage. Fuses shall be installed in series with the power meter voltage references. 2 amp fuses shall be used in this application.

8.4.5. Meters shall be installed in the main distribution panel (MDP) when possible. Meters shall not be mounted to the transformer housing without prior approval when there is no other reasonable place to mount it.

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8.4.6. All electric meters shall be connected to the GSA Region 8 Metering system thru GSA network in accordance with the GSA IT staffs direction.

The following shall be performed when adding the meter:

8.4.6.1. Definition of the meters in the system database.

8.4.6.2. Development of reports including any custom reports which may be required.

8.4.6.3. End to End testing of the new meters.

8.4.6.4. The meter connection will be loaded on the GSA Region 8 server found at the Denver Federal Center, Lakewood, Colorado.

8.4.6.5. Addition of the meters to the graphics screens in the WinPM software.

8.4.6.6. Addition of all added devices into ALL existing custom reports that are applicable.

8.5. Transformers

8.5.1. Stand alone boost up transformers not incorporated into the inverters shall have an efficiency greater than 97%. Exterior Transformers shall be housed in a NEMA 3R enclosure and be pad mounted. They can be mounted on roofs if structurally sufficient or shall be located next to switchgear housings where indicated on drawings.

8.6. Structural Requirements

8.6.1. All structures, including array structures, shall be designed in accordance with all applicable state and local codes and standards.

8.6.2. The contractor shall provide structural calculations, stamped by a licensed professional structural engineer in the appropriate state.

8.6.3. All structural components shall be non corrosive (galvanized steel, stainless steel or aluminum). All hardware shall be stainless steel or aluminum. All components shall be designed to obtain a minimum 40 year design life.

8.6.4. All roof penetrations shall be designed and constructed in collaboration with the roofing professional or manufacturer responsible for the roof and roofing material warranty for the specific site. The number and size of the penetrations necessary to extend the power and control cable into the building must be kept to a minimum and grouped in a single location when practicable. All weather proofing of penetrations shall be compatible with the roof warranty or if roof has no warranty then accepted best practice.

Building 810 specific requirements: no connections or penetrations shall be made in the membrane valleys between the barrel vaults.

8.6.5. Rooftop installations where there is no parapet or the parapet is less than

42”, a 6’ safety zone from the roof edge to the PV system shall be maintained. A 3’ clear path of travel shall be maintained to and around all

Photovoltaic System Page 13 of 15 rooftop equipment. On Building 810: the design shall address access for maintenance and replacement of the equipment. Appropriate fall protection or temporary platforms shall be incorporated into the design to allow for this maintenance and replacement work. If the inverters are mounted on the roof this equipment shall have permanent access walkways installed to facilitate monitoring and maintenance.

8.7. Attachment to Roof

8.7.1. System shall be mounted on the roof using the best means practicable such as direct attachment or a fully ballasted system. All penetrations and structural connections associated with supports and conduit shall be kept to a minimum and shall be water-proof.

8.8. Lightning Protection – Provide surge protection on all electrical systems.

8.9. Total PV System Warranty: The PV systems shall be carry a five (5) year warranty by both the manufacturer and the installer including parts and labor.

The roof penetrations and roof connections on building 810 shall be warranted for weather tightness for ten (10) years from the installer including parts and labor.

9. SHOP DRAWINGS/PRODUCT DATA

9.1. Submissions: The Contractor shall submit shop drawings and product data / submittals, catalog cuts, etc. as stipulated herein. Shop Drawing/product data submissions to the Government shall be made after review and approval by the Contractor. All approved product data and shop drawings shall be delivered to the Government in one submission. Shop drawing and product data submissions shall be made to the Contracting Officer's Representative and shall contain four

(6) copies and 2 CDs containing copies of all the materials.

The Contractor shall combine all product data submission material into hard copy manuals for reference during all phases of construction. Shop drawings shall be bound with product data.

See also Electronic Project Management requirements in Section 1, General Requirements. .

9.2. Reviews: Reviews of shop drawings and product data by the Government are not to be interpreted as an approval of the Contractor's product selections. The Contractor shall remain completely responsible for constructing the photovoltaic system in accordance with all contract performance requirements.

9.3. Products for Submission: The Contractor shall provide shop drawings and product data for all systems, equipment and materials.

10. INSPECTIONS AND TESTS

10.1. General: The Contractor shall perform inspections and tests throughout the construction process including: existing conditions/needs assessments, Photovoltaic System Page 14 of 15 construction installation placement/qualification measurements and final inspections/tests performance certification. Periodic “Quality” inspections shall also be conducted to support progress payments as identified in the contractor’s quality control plan.

10.2. Government Witness: All inspections and tests, to verify documented contract assumptions, to establish work accomplishment, or to certify performance attainment shall be witnessed by the Government and/or CM and coordinated through the QCP.

10.3. Final Inspections and Tests. In order to ensure compliance with provisions of the NEC, an inspection by a licensed electrical inspector is mandatory after construction is complete. Unless otherwise identified, manufacturer recommendations shall be followed for all inspection and test procedures.

Tests shall include a commissioning of the array with individual string voltage, current, and solar irradiance measured in the plane of the array and recorded.

Commissioning shall be preformed for the entire PV system. This data shall be used to confirm proper performance of the PV system.

10.4. Documentation: Inspections/tests required in the QCP shall result in a written record of data/observations. The Contractor shall provide two (2) copies of documents containing all test reports/findings. Test results shall typically include:

item/system tested, location, date of test, test parameters/measured data, state of construction completion, operating mode, Contractor Inspector/Government witness, test equipment description and measurement technique.

11. PROJECT CLOSEOUT

11.1. Preparation for Final Inspection and Tests. The following steps shall be taken to assure the project is in a condition to…