FRV AE SOLAR PROJECT, WEBBERVILLE, TX SPECIFICATION FOR THE TURNKEY, DESIGN AND BUILD OF THE OPERATIONS & MAINTENANCE (O&M) BUILDINGS

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1 FRV AE SOLAR PROJECT, WEBBERVILLE, TX SPECIFICATION FOR THE TURNKEY, DESIGN AND BUILD OF THE OPERATIONS & MAINTENANCE (O&M) BUILDINGS Author: Leasa Lennox Date: 2 May 2011 Ref: Prepared: Leasa Lennox Signed Electronically: May/03/2011 Approved: Bill Branca Signed Electronically: May/04/2011 Checked: Gopal Padmanabhan Signed Electronically: May/03/2011 James Godwin May/03/2011

2 Revision History Issue Date Nature And Location Of Change May 2011 First Created

3 Introduction FRV AE SOLAR PROJECT, WEBBERVILLE, TX SPECIFICATION FOR THE TURNKEY, DESIGN AND BUILD OF THE OPERATIONS & MAINTENANCE (O&M) BUILDINGS OUTLINE SPECIFICATION This outline specification is a guidance document to indicate the functional requirements of the building. Full design drawings and specification shall be produced by the contractor prior to commencing construction. The design, supply, construction and all details, finishes, grading and other construction details will be the responsibility of the contractor. General requirements of the O&M buildings The first O&M building shall be primarily utilized as an office accommodation. The office areas shall be temperature and humidity controlled and fitted out and finished in a manner in keeping with what would be commonly expected in a commercial office environment (including but not limited to the capability to accommodate a copy and fax machine connected to a regular phone line, computer work stations, etc.). This overall space shall house offices, SCADA room, a common area for meetings, small kitchenette and restroom facilities. This O&M building shall be referred to as the Office. The second O&M building will be for a workshop, maintenance and storage area. This area should include a work space, industrial type shelving, a man door and appropriately sized roll up door. This O&M building shall be referred to and the Workshop. Each building shall be approximately ft 2 in plan; the nominal height of the office building will be consistent with industry practice for construction of an office building. The nominal eave height of the Workshop should be high enough to house a telehandler. The buildings shall incorporate the following requirements and features: 1 DESIGN a) The proposed design shall comply with ALL relevant standards, codes and regulations as applicable and required in Travis County/City of Austin where the project is located.

4 b) The proposed design shall be an engineered steel-framed building with steel roof and siding. All exposed structural steel work shall be pre-painted with a finish coat; cost effective alternates to a engineered steel-framed building will considered. 2 SITE WORKS a) Initial preparation of the O&M compound (cut/fill and initial grading) will be by others. b) Final grading and preparation of finished trafficked surface (following building construction) will be by contractor. c) Outside the buildings there shall be a parking area for minimum 10 vehicles defined by concrete parking curbs, and space for two 40ft containers. The containers (by others) shall be placed on levelled gravel surface and shall be positioned to allow pick-up truck access to the doors. 3 FENCING a) Fencing of the O&M building will be by others. 4 CONCRETE FOUNDATIONS AND FLOOR SLAB a) In-situ reinforced concrete floor pad throughout structure. The workshop floor shall be adequately reinforced to withstand the loading of a fully-laden 10,000 telehandler and built to allow oil spillage. The offices floor slab shall be adequately reinforced to withstand typical anticipated office floor loadings in this application. The floor shall be constructed using concrete with a minimum 28- day compressive strength of 4,000 psi; b) A concrete apron of suitable load capacity shall be installed on the south elevation in front of the main entrance and roll-up door. c) Buried conduits for incoming services and SCADA; the actual locations and routing will be determined as part of the design effort. The conduits will daylight near the designated phone board in the SCADA room. 5 METAL BUILDING SYSTEM a) Exterior walls and roof shall be adequately insulated against cold and heat. b) Roof Concept design shows two way pitched roof to a nominal pitch. Contractor shall design roof to local loading requirements. Other roof designs (hipped, mansard, mono-pitch or domed) will be considered.

5 c) Canopies and rain gutters above the covered porch, each external door. Rain gutters to be fitted with down pipes to ground level. 6 EXTERIOR DOORS, WINDOWS AND OPENINGS a) Windows - Exterior, aluminium and insulated windows complete with security mesh screens. Roller or Venetian blinds at each window in the Office building. b) Doors - All exterior doors shall be heavy duty insulated steel doors and frames. Heavy-duty overhead holder, closer and handles shall be provided to protect doors from wind damage. Kick-plates and panic bars shall be provided on the inside of exterior doors. All doors shall be lockable and keyed. Main entry door for both buildings will have a window. c) Roller Shutter Door - One electrically operated roller-shutter garage door, 10ft wide and 10ft high; overhead door shall allow easy access for trucks and area in front of overhead doors shall be well lighted. 7 INTERIOR CONSTRUCTION & FIT OUT a) General - The proposed design shall comply with ALL relevant standards, codes and regulations as applicable in Travis County/City of Austin; b) Doors - all interior doors shall be metal construction and contain a single glass window (approximately 24" x 24"), except for the rest room doors. c) Floor Finishes: the office floors shall be 1/8 inch VCT (Vinyl Tile); Restroom facilities shall be provided with ceramic tile flooring and minimum 48 inch high wainscoting. Tile and grout manufacturer and colour shall be approved in advance of installation by RES. Durable and suitable alternates will be considered. Floor in the workshop shall be treated concrete that provides a durable, slip resistant finish suitable for this type of application. d) Wall Finshes for office; Gypsum board surfaces shall be primed and then finish painted with two coats of durable paint (semi-gloss acrylic enamel). Provide MR Gypsum board in restroom or other areas that may require this. All finish paint colours shall be approved by RES in advance. e) Ceiling Finishes for office; Provide suspended ceiling tiles in office, reception, tech room. Provide MR ceiling tiles in restroom or other areas that may require this. Provide suspended plasterboard ceiling in SCADA room. f) SCADA Room; The SCADA room shall be temperature and humidity controlled. A separate, fully independent A/C to the SCADA room (heat load 2500w) shall be balanced (external filtered inlet and outlet). The SCADA room door shall be

6 sealed, to prevent ingress of dust and it shall be lockable with a security system that uses a card or key pad. g) Workshop; No drywall or special ceiling treatments are required. A workstation table where there would be electrical and communications is required. 8 SHELVING a) The workshop area shall be fitted with shelves (4 * 32 ) suitable for pallets along one wall. 9 PLUMBING & SANITARYWARE a) One unisex bathroom in the office and workshop; the one in the workshop requires a 36" square pre-formed shower and curtain, and both with a single wash basin, mirror, soap dispenser, one toilet, and hand-drying facilities. Fixed Furniture & Sanitary ware to be designated as light commercial. Floor drain to be provided in both bathrooms; b) Hot and cold running water to the bathrooms and break room/common area; c) Provide a standard slop sink with cold and warm water in the workshop. d) Provide (1) external bib tap for external water distribution at the workshop. 10 FIRE PROTECTION a) General - The proposed design shall comply with ALL relevant standards, codes and regulations as applicable in Travis County/City of Austin; b) Detection and escape signage - Contractor shall design and build O&M building to incorporate all necessary smoke / heat / fire detection and alarms and provide adequate escape signage / lighting and door hardware as required. c) Passive Fire Protection - Contractor shall design and build O&M building to incorporate all necessary fire walls, doors and screening as required. d) Active Fire Protection - Contractor shall design and build O&M building to incorporate all necessary sprinkler systems and fire extinguishers as required. 11 HVAC & HEATING a) All heating to be provided from electrical sources. b) HVAC system for the offices shall be sized for expected heat and cooling loads. a) The HVAC system shall have a master digital thermostat and individual thermostat in reception (with adjustable +/- temperature range).

7 b) A separate, fully independent A/C to the SCADA room (heat load 2500w) shall be balanced (external filtered inlet and outlet). c) Adequate overhead heaters in the workshop area; the capacity shall provide a minimum winter temperature of 50F on the floor level. d) One powered extractor fan installed in the workshop walls. The fan exits shall be louvered such that they automatically close when fans are turned off. 12 ELECTRICAL & LIGHTING a) Power Distribution to Building - Electrical service to the building shall be obtained from Bluebonnet Electrical Cooperative. Delineation point will be an OHL pole structure located at the perimeter of the compound (by others). Contractor shall provide underground power supply in conduit from the delineation point to building. Contractor shall provide (2) spare conduits from the delineation point to building. If required the Contractor will provide the meter base per Bluebonnet s requirements. b) Power Distribution within Building - 120V service in general. Provide for the installation of an air compressor in the maintenance area. Provide for 120V/30Amp power source for SCADA Server and 120V/20Amp for future. c) Internal Lighting - Offices lighting to be flush-mount fluorescent lighting panels (with specular reflectors) fitted in the suspended ceiling. Workshop lighting to be 400W metal halide units or similar; d) External Lighting - External wall-mounted floodlights will be required at every entrance. Lights to be fitted with photocells to allow automatic night-time operation; e) Provide an external socket with a transfer switch for emergency stand-by generator (by others). f) Provide outside electrical sockets in suitable locations at the workshop and office. g) Electrical service for a well and a location for a pressure tank will be required in the workshop. 13 TELECOMS & DATA a) Telcoms - Telephone service comprising four regular telephone lines. Within the building the installation shall comprise (2) telephone jacks in reception, (one phone / one fax), (1) telephone jack in each office, (1) telephone jack in the

8 workshop and the (1) SCADA room, all wired back to the SCADA room for connection to the incoming telephone service. b) Data Distribution to Building - High-speed internet connection shall be provided (by others). Provision shall be made for a conduit feed into the SCADA room near the phone board. c) Data Distribution within the Building - The installation shall also comprise CAT5 jacks in the same quantities with CAT5 cabling back to the SCADA room, such that all computers can be networked. One spare conduit from the SCADA room to each office and the tech room (for future expansion); all communications wiring shall start in close proximity of the phone board in the SCADA room. 14 SEPTIC TANK AND FIELD DRAIN SYSTEM An underground septic tank and leeching system and associated plumbing as required by local laws for the facility described and will be provided by others. The coordination of this work and associated entrance is the responsibility of the contractor. 15 SERVICE WATER SUPPLY A water service from the local utility will be installed to the building by others. Connections and coordination of this work and associated entrance is the responsibility of the contractor.

9 Appendix 1 Sample Office Building Layout *note: This is a sample only and is not intended for the design basis.