ADDENDUM NO. 4. SWC Central Plant Mechanical Systems and Energy Loop Project. Bid No Otay Lake Road. Chula Vista, CA, 91910

ADDENDUM NO. 4 SWC Central Plant Mechanical Systems and Energy Loop Project Bid No. 188 900 Otay Lake Road Chula Vista, CA, 91910 December 22, 2011 1. PART 1 GENERAL 1.1. The following revisions and/or clarifications shall be made to the bidding requirements and contract documents. Revise and amend the documents for the above named project in accordance with this addendum. The bid shall reflect these addendum changes and each bidder shall make reference in their bid t this addendum. 1.2. All bidding requirements and contract documents shall apply to this addendum as originally indicated in the applicable portions of the contract documents, unless otherwise modified by this addendum. 1.3. Revised text in the specifications is indicated with strike through for deleted text. 2. PART 2 PROJECT MANUAL 2.1. REMOVE PAGE 1 OF SECTION 336113 UNDERGROUND HYDRONIC ENERGY DISTRIBUTION 2.2. ADD PAGE 1 OF SECTION 336113 UNDERGROUND HYDRONIC ENERGY DISTRIBUTION 2.3. ADD SECTION 271300 COMMUNICATIONS BACKBONE CABLING DRAWINGS: REMOVE AND REPLACE DRAWING M0.2 RFI s: PRE-BID RFI S ARE RESPONDED TO IN THE ATTACHED PRE-BID RFI LOG. END OF ADDENDUM NO. 4 1

Gensler November 21, 2011 Southwestern College 55.7200.000 Issued for Bidding Central Plant & Energy Loop SECTION 27 13 00 - COMMUNICATIONS BACKBONE CABLING PART 1 - GENERAL 1.1 RELATED DOCUMENTS A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section. 1.2 SUMMARY A. Section Includes: 1. Pathways. 2. UTP cable. 3. 62.5/125-micrometer, optical fiber cabling. 4. Coaxial cable. 5. Cable connecting hardware, patch panels, and cross-connects. 6. Cabling identification products. B. Related Sections: 1. Division 28 Section "Conductors and Cables for Electronic Safety and Security" for voice and data cabling associated with system panels and devices. 1.3 DEFINITIONS A. BICSI: Building Industry Consulting Service International. B. Cross-Connect: A facility enabling the termination of cable elements and their interconnection or cross-connection. C. EMI: Electromagnetic interference. D. IDC: Insulation displacement connector. E. LAN: Local area network. F. RCDD: Registered Communications Distribution Designer. G. UTP: Unshielded twisted pair. 1.4 BACKBONE CABLING DESCRIPTION A. Backbone cabling system shall provide interconnections between communications equipment rooms, main terminal space, and entrance facilities in the telecommunications cabling system COMMUNICATIONS BACKBONE CABLING Copyright 2011 Gensler 27 13 00-1

Gensler November 21, 2011 Southwestern College 55.7200.000 Issued for Bidding Central Plant & Energy Loop structure. Cabling system consists of backbone cables, intermediate and main cross-connects, mechanical terminations, and patch cords or jumpers used for backbone-to-backbone crossconnection. B. Backbone cabling cross-connects may be located in communications equipment rooms or at entrance facilities. Bridged taps and splitters shall not be used as part of backbone cabling. 1.5 PERFORMANCE REQUIREMENTS A. General Performance: Backbone cabling system shall comply with transmission standards in TIA/EIA-568-B.1, when tested according to test procedures of this standard. 1.6 SUBMITTALS A. Product Data: For each type of product indicated. 1. For coaxial cable, include the following installation data for each type used: B. Shop Drawings: a. Nominal OD. b. Minimum bending radius. c. Maximum pulling tension. 1. System Labeling Schedules: Electronic copy of labeling schedules, in software and format selected by Owner. 2. System Labeling Schedules: Electronic copy of labeling schedules that are part of the cabling and asset identification system of the software. 3. Cabling administration drawings and printouts. 4. Wiring diagrams to show typical wiring schematics including the following: a. Cross-connects. b. Patch panels. c. Patch cords. 5. Cross-connects and patch panels. Detail mounting assemblies, and show elevations and physical relationship between the installed components. 6. Cable tray layout, showing cable tray route to scale, with relationship between the tray and adjacent structural, electrical, and mechanical elements. Include the following: a. Vertical and horizontal offsets and transitions. b. Clearances for access above and to side of cable trays. c. Vertical elevation of cable trays above the floor or bottom of ceiling structure. d. Load calculations to show dead and live loads as not exceeding manufacturer's rating for tray and its support elements. C. Qualification Data: For Installer, qualified layout technician, installation supervisor, and field inspector. D. Source quality-control reports. COMMUNICATIONS BACKBONE CABLING Copyright 2011 Gensler 27 13 00-2

Gensler November 21, 2011 Southwestern College 55.7200.000 Issued for Bidding Central Plant & Energy Loop E. Field quality-control reports. F. Maintenance Data: For splices and connectors to include in maintenance manuals. G. Software and Firmware Operational Documentation: 1. Software operating and upgrade manuals. 2. Program Software Backup: On magnetic media or compact disk, complete with data files. 3. Device address list. 4. Printout of software application and graphic screens. 1.7 QUALITY ASSURANCE A. Installer Qualifications: Cabling Installer must have personnel certified by BICSI on staff. 1. Layout Responsibility: Preparation of Shop Drawings Cabling Administration Drawings, and field testing program development by an RCDD. 2. Installation Supervision: Installation shall be under the direct supervision of Level 2 Installer, who shall be present at all times when Work of this Section is performed at Project site. 3. Testing Supervisor: Currently certified by BICSI as an RCDD to supervise on-site testing. B. Testing Agency Qualifications: An NRTL. 1. Testing Agency's Field Supervisor: Currently certified by BICSI as an RCDD to supervise on-site testing. C. Surface-Burning Characteristics: As determined by testing identical products according to ASTM E 84 by a qualified testing agency. Identify products with appropriate markings of applicable testing agency. 1. Flame-Spread Index: 25 or less. 2. Smoke-Developed Index: 50 or less. D. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, by a qualified testing agency, and marked for intended location and application. E. Telecommunications Pathways and Spaces: Comply with TIA/EIA-569-A. F. Grounding: Comply with ANSI-J-STD-607-A. 1.8 DELIVERY, STORAGE, AND HANDLING A. Test cables upon receipt at Project site. 1. Test optical fiber cable to determine the continuity of the strand end to end. Use optical fiber flashlight. COMMUNICATIONS BACKBONE CABLING Copyright 2011 Gensler 27 13 00-3

Gensler November 21, 2011 Southwestern College 55.7200.000 Issued for Bidding Central Plant & Energy Loop 2. Test optical fiber cable while on reels. Use an optical time domain reflectometer to verify the cable length and locate cable defects, splices, and connector, including the loss value of each. Retain test data and include the record in maintenance data. 3. Test each pair of UTP cable for open and short circuits. 1.9 PROJECT CONDITIONS A. Environmental Limitations: Do not deliver or install cables and connecting materials until wet work in spaces is complete and dry, and temporary HVAC system is operating and maintaining ambient temperature and humidity conditions at occupancy levels during the remainder of the construction period. 1.10 COORDINATION A. Coordinate layout and installation of telecommunications pathways and cabling with Owner's telecommunications and LAN equipment and service suppliers. PART 2 - PRODUCTS 2.1 PATHWAYS A. General Requirements: Comply with TIA/EIA-569-A. B. Cable Support: NRTL labeled for support of Category 6 cabling, designed to prevent degradation of cable performance and pinch points that could damage cable. 1. Support brackets with cable tie slots for fastening cable ties to brackets. 2. Lacing bars, spools, J-hooks, and D-rings. 3. Straps and other devices. C. Cable Trays: 1. Manufacturers: Subject to compliance with requirements, provide products by one of the following: a. Cable Management Solutions, Inc. b. Cablofil Inc. c. Cooper B-Line, Inc. d. Cope - Tyco/Allied Tube & Conduit. e. GS Metals Corp. 2. Cable Tray Material: Metal, suitable for indoors, and protected against corrosion by hotdip galvanizing, complying with ASTM A 123/A 123M, Grade 0.55, not less than 0.002165 inches (0.055 mm) thick. D. Conduit and Boxes: Comply with requirements in Division 26 Section "Raceway and Boxes for Electrical Systems." Flexible metal conduit shall not be used. COMMUNICATIONS BACKBONE CABLING Copyright 2011 Gensler 27 13 00-4

Gensler November 21, 2011 Southwestern College 55.7200.000 Issued for Bidding Central Plant & Energy Loop 1. Outlet boxes shall be no smaller than 2 inches (50 mm) wide, 3 inches (75 mm) high, and 2-1/2 inches (64 mm) deep. 2.2 BACKBOARDS A. Backboards: Plywood, fire-retardant treated, 3/4 by 48 by 96 inches (19 by 1220 by 2440 mm). Comply with requirements in Division 06 Section "Rough Carpentry" for plywood backing panels. 2.3 UTP CABLE A. Manufacturers: Subject to compliance with requirements, provide products by one of the following: 1. Belden CDT Inc.; Electronics Division. 2. Berk-Tek; a Nexans company. 3. CommScope, Inc. 4. Draka USA. 5. Genesis Cable Products; Honeywell International, Inc. 6. KRONE Incorporated. 7. Mohawk; a division of Belden CDT. 8. Nordex/CDT; a subsidiary of Cable Design Technologies. 9. Superior Essex Inc. 10. SYSTIMAX Solutions; a CommScope Inc. brand. 11. 3M. 12. Tyco Electronics/AMP Netconnect; Tyco International Ltd. B. Description: 100-ohm, 100-pair UTP, formed into 25-pair binder groups covered with a gray thermoplastic jacket and overall metallic shield. 1. Comply with ICEA S-90-661 for mechanical properties. 2. Comply with TIA/EIA-568-B.1 for performance specifications. 3. Comply with TIA/EIA-568-B.2, Category 6. 4. Listed and labeled by an NRTL acceptable to authorities having jurisdiction as complying with UL 444 and NFPA 70 for the following types: a. Communications, General Purpose: Type CM or CMG. b. Communications, Plenum Rated: Type CMP, complying with NFPA 262. c. Communications, Riser Rated: Type CMR, complying with UL 1666. 2.4 UTP CABLE HARDWARE A. Manufacturers: Subject to compliance with requirements, provide products by one of the following: 1. American Technology Systems Industries, Inc. 2. Dynacom Corporation. 3. Hubbell Premise Wiring. COMMUNICATIONS BACKBONE CABLING Copyright 2011 Gensler 27 13 00-5

Gensler November 21, 2011 Southwestern College 55.7200.000 Issued for Bidding Central Plant & Energy Loop 4. KRONE Incorporated. 5. Leviton Voice & Data Division. 6. Molex Premise Networks; a division of Molex, Inc. 7. Nordex/CDT; a subsidiary of Cable Design Technologies. 8. Panduit Corp. 9. Siemon Co. (The). 10. Tyco Electronics/AMP Netconnect; Tyco International Ltd. B. General Requirements for Cable Connecting Hardware: Comply with TIA/EIA-568-B.2, IDC type, with modules designed for punch-down caps or tools. Cables shall be terminated with connecting hardware of same category or higher. C. Connecting Blocks: 110-style IDC for Category 6. Provide blocks for the number of cables terminated on the block, plus 25 percent spare. Integral with connector bodies, including plugs and jacks where indicated. D. Cross-Connect: Modular array of connecting blocks arranged to terminate building cables and permit interconnection between cables. 1. Number of Terminals per Field: One for each conductor in assigned cables. E. Patch Panel: Modular panels housing multiple-numbered jack units with IDC-type connectors at each jack for permanent termination of pair groups of installed cables. 1. Number of Jacks per Field: One for each four-pair UTP cable indicated, plus spares and blank positions adequate to suit specified expansion criteria. F. Jacks and Jack Assemblies: Modular, color-coded, eight-position modular receptacle units with integral IDC-type terminals. G. Patch Cords: Factory-made, 4-pair cables in 48-inch (1200-mm) lengths; terminated with 8- position modular plug at each end. 1. Patch cords shall have bend-relief-compliant boots and color-coded icons to ensure Category 6 performance. Patch cords shall have latch guards to protect against snagging. 2. Patch cords shall have color-coded boots for circuit identification. 2.5 OPTICAL FIBER CABLE A. Manufacturers: Subject to compliance with requirements, provide products by one of the following: 1. Berk-Tek; a Nexans company. 2. CommScope, Inc. 3. Corning Cable Systems. 4. General Cable Technologies Corporation. 5. Mohawk; a division of Belden CDT. 6. Nordex/CDT; a subsidiary of Cable Design Technologies. 7. Optical Connectivity Solutions Division; Emerson Network Power. 8. Superior Essex Inc. COMMUNICATIONS BACKBONE CABLING Copyright 2011 Gensler 27 13 00-6

Gensler November 21, 2011 Southwestern College 55.7200.000 Issued for Bidding Central Plant & Energy Loop 9. SYSTIMAX Solutions; a CommScope Inc. brand. 10. 3M. 11. Tyco Electronics/AMP Netconnect; Tyco International Ltd. B. Description: Multimode, 62.5/125-micrometer, 24-fiber, nonconductive, tight buffer, optical fiber cable. 1. Comply with ICEA S-83-596 for mechanical properties. 2. Comply with TIA/EIA-568-B.3 for performance specifications. 3. Comply with TIA/EIA-492AAAA-B for detailed specifications. 4. Listed and labeled by an NRTL acceptable to authorities having jurisdiction as complying with UL 444, UL 1651, and NFPA 70 for the following types: a. General Purpose, Nonconductive: Type OFN or OFNG. b. Plenum Rated, Nonconductive: Type OFNP, complying with NFPA 262. c. Riser Rated, Nonconductive: Type OFNR, complying with UL 1666. d. General Purpose, Conductive: Type OFC or OFCG. e. Plenum Rated, Conductive: Type OFCP, complying with NFPA 262. f. Riser Rated, Conductive: Type OFCR, complying with UL 1666. 5. Maximum Attenuation: 3.50 db/km at 850 nm; 1.5 db/km at 1300 nm. 6. Minimum Modal Bandwidth: 160 MHz-km at 850 nm; 500 MHz-km at 1300 nm. C. Jacket: 1. Jacket Color: Orange for 62.5/125-micrometer cable. 2. Cable cordage jacket, fiber, unit, and group color shall be according to TIA/EIA-598-B. 3. Imprinted with fiber count, fiber type, and aggregate length at regular intervals not to exceed 40 inches (1000 mm). 2.6 OPTICAL FIBER CABLE HARDWARE A. Manufacturers: Subject to compliance with requirements, provide products by one of the following: 1. ADC. 2. American Technology Systems Industries, Inc. 3. Berk-Tek; a Nexans company. 4. Corning Cable Systems. 5. Dynacom Corporation. 6. Hubbell Premise Wiring. 7. Molex Premise Networks; a division of Molex, Inc. 8. Nordex/CDT; a subsidiary of Cable Design Technologies. 9. Optical Connectivity Solutions Division; Emerson Network Power. 10. Siemon Co. (The). B. Cross-Connects and Patch Panels: Modular panels housing multiple-numbered, duplex cable connectors. 1. Number of Connectors per Field: One for each fiber of cable or cables assigned to field, plus spares and blank positions adequate to suit specified expansion criteria. COMMUNICATIONS BACKBONE CABLING Copyright 2011 Gensler 27 13 00-7

Gensler November 21, 2011 Southwestern College 55.7200.000 Issued for Bidding Central Plant & Energy Loop C. Patch Cords: Factory-made, dual-fiber cables in 36-inch (900-mm) lengths. D. Cable Connecting Hardware: 1. Comply with Optical Fiber Connector Intermateability Standards (FOCIS) specifications of TIA/EIA-604-2, TIA/EIA-604-3-A, and TIA/EIA-604-12. Comply with TIA/EIA- 568-B.3. 2. Quick-connect, simplex and duplex, Type LC connectors. Insertion loss not more than 0.75 db. 3. Type SFF connectors may be used in termination racks, panels, and equipment packages. 2.7 GROUNDING A. Comply with requirements in Division 26 Section "Grounding and Bonding for Electrical Systems." for grounding conductors and connectors. B. Comply with ANSI-J-STD-607-A. 2.8 IDENTIFICATION PRODUCTS A. Comply with TIA/EIA-606-A and UL 969 for a system of labeling materials, including label stocks, laminating adhesives, and inks used by label printers. 2.9 SOURCE QUALITY CONTROL A. Testing Agency: Engage a qualified testing agency to evaluate cables. B. Factory test cables on reels according to TIA/EIA-568-B.1. C. Factory test UTP cables according to TIA/EIA-568-B.2. D. Factory test multimode optical fiber cables according to TIA/EIA-526-14-A and TIA/EIA-568- B.3. E. Cable will be considered defective if it does not pass tests and inspections. F. Prepare test and inspection reports. PART 3 - EXECUTION 3.1 ENTRANCE FACILITIES A. Coordinate backbone cabling with the protectors and demarcation point provided by communications service provider. COMMUNICATIONS BACKBONE CABLING Copyright 2011 Gensler 27 13 00-8

Gensler November 21, 2011 Southwestern College 55.7200.000 Issued for Bidding Central Plant & Energy Loop 3.2 INSTALLATION OF PATHWAYS A. Cable Trays: Comply with NEMA VE 2 and TIA/EIA-569-A. B. Comply with requirements for demarcation point, pathways, cabinets, and racks specified in Division 27 Section "Communications Equipment Room Fittings." Drawings indicate general arrangement of pathways and fittings. C. Comply with TIA/EIA-569-A for pull-box sizing and length of conduit and number of bends between pull points. D. Comply with requirements in Division 26 Section "Raceway and Boxes for Electrical Systems" for installation of conduits and wireways. E. Install manufactured conduit sweeps and long-radius elbows whenever possible. F. Pathway Installation in Communications Equipment Rooms: 1. Position conduit ends adjacent to a corner on backboard where a single piece of plywood is installed, or in the corner of room where multiple sheets of plywood are installed around perimeter walls of room. 2. Install cable trays to route cables if conduits cannot be located in these positions. 3. Secure conduits to backboard when entering room from overhead. 4. Extend conduits 3 inches (76 mm) above finished floor. 5. Install metal conduits with grounding bushings and connect with grounding conductor to grounding system. G. Backboards: Install backboards with 96-inch (2440-mm) dimension vertical. Butt adjacent sheets tightly, and form smooth gap-free corners and joints. 3.3 INSTALLATION OF CABLES A. Comply with NECA 1. B. General Requirements for Cabling: 1. Comply with TIA/EIA-568-B.1. 2. Comply with BICSI ITSIM, Ch. 6, "Cable Termination Practices." 3. Install 110-style IDC termination hardware unless otherwise indicated. 4. Terminate all conductors; no cable shall contain unterminated elements. Make terminations only at indicated outlets, terminals, cross-connects, and patch panels. 5. Cables may not be spliced. Secure and support cables at intervals not exceeding 30 inches (760 mm) and not more than 6 inches (150 mm) from cabinets, boxes, fittings, outlets, racks, frames, and terminals. 6. Install lacing bars to restrain cables, to prevent straining connections, and to prevent bending cables to smaller radii than minimums recommended by manufacturer. 7. Bundle, lace, and train conductors to terminal points without exceeding manufacturer's limitations on bending radii, but not less than radii specified in BICSI ITSIM, "Cabling Termination Practices" Chapter. Use lacing bars and distribution spools. COMMUNICATIONS BACKBONE CABLING Copyright 2011 Gensler 27 13 00-9

Gensler November 21, 2011 Southwestern College 55.7200.000 Issued for Bidding Central Plant & Energy Loop 8. Do not install bruised, kinked, scored, deformed, or abraded cable. Do not splice cable between termination, tap, or junction points. Remove and discard cable if damaged during installation and replace it with new cable. 9. Cold-Weather Installation: Bring cable to room temperature before dereeling. Heat lamps shall not be used for heating. 10. In the communications equipment room, install a 10-foot- (3-m-) long service loop on each end of cable. 11. Pulling Cable: Comply with BICSI ITSIM, Ch. 4, "Pulling Cable." Monitor cable pull tensions. C. UTP Cable Installation: 1. Comply with TIA/EIA-568-B.2. 2. Do not untwist UTP cables more than 1/2 inch (12 mm) from the point of termination to maintain cable geometry. D. Optical Fiber Cable Installation: 1. Comply with TIA/EIA-568-B.3. 2. Cable may be terminated on connecting hardware that is rack or cabinet mounted. E. Open-Cable Installation: 1. Install cabling with horizontal and vertical cable guides in telecommunications spaces with terminating hardware and interconnection equipment. 2. Suspend UTP cable not in a wireway or pathway, a minimum of 8 inches (200 mm) above ceilings by cable supports not more than [60 inches (1524 mm)] <Insert dimension> apart. 3. Cable shall not be run through structural members or in contact with pipes, ducts, or other potentially damaging items. F. Group connecting hardware for cables into separate logical fields. G. Separation from EMI Sources: 1. Comply with BICSI TDMM and TIA/EIA-569-A recommendations for separating unshielded copper voice and data communication cable from potential EMI sources, including electrical power lines and equipment. 2. Separation between open communications cables or cables in nonmetallic raceways and unshielded power conductors and electrical equipment shall be as follows: a. Electrical Equipment Rating Less Than 2 kva: A minimum of 5 inches (127 mm). b. Electrical Equipment Rating between 2 and 5 kva: A minimum of 12 inches (300 mm). c. Electrical Equipment Rating More Than 5 kva: A minimum of 24 inches (610 mm). 3. Separation between communications cables in grounded metallic raceways and unshielded power lines or electrical equipment shall be as follows: COMMUNICATIONS BACKBONE CABLING Copyright 2011 Gensler 27 13 00-10

Gensler November 21, 2011 Southwestern College 55.7200.000 Issued for Bidding Central Plant & Energy Loop a. Electrical Equipment Rating Less Than 2 kva: A minimum of 2-1/2 inches (64 mm). b. Electrical Equipment Rating between 2 and 5 kva: A minimum of 6 inches (150 mm). c. Electrical Equipment Rating More Than 5 kva: A minimum of 12 inches (300 mm). 4. Separation between communications cables in grounded metallic raceways and power lines and electrical equipment located in grounded metallic conduits or enclosures shall be as follows: a. Electrical Equipment Rating Less Than 2 kva: No requirement. b. Electrical Equipment Rating between 2 and 5 kva: A minimum of 3 inches (76 mm). c. Electrical Equipment Rating More Than 5 kva: A minimum of 6 inches (150 mm). 5. Separation between Communications Cables and Electrical Motors and Transformers, 5 kva or HP and Larger: A minimum of 48 inches (1200 mm). 6. Separation between Communications Cables and Fluorescent Fixtures: A minimum of 5 inches (127 mm). 3.4 FIRESTOPPING A. Comply with requirements in Division 07 Section "Penetration Firestopping."Comply with TIA/EIA-569-A, Annex A, "Firestopping." B. Comply with BICSI TDMM, "Firestopping Systems" Article. 3.5 GROUNDING A. Install grounding according to BICSI TDMM, "Grounding, Bonding, and Electrical Protection" Chapter. B. Comply with ANSI-J-STD-607-A. C. Locate grounding bus bar to minimize the length of bonding conductors. Fasten to wall allowing at least 2-inch (50-mm) clearance behind the grounding bus bar. Connect grounding bus bar with a minimum No. 4 AWG grounding electrode conductor from grounding bus bar to suitable electrical building ground. D. Bond metallic equipment to the grounding bus bar, using not smaller than No. 6 AWG equipment grounding conductor. 3.6 FIELD QUALITY CONTROL A. Testing Agency: Engage a qualified testing agency to perform tests and inspections. B. Perform tests and inspections. COMMUNICATIONS BACKBONE CABLING Copyright 2011 Gensler 27 13 00-11

Gensler November 21, 2011 Southwestern College 55.7200.000 Issued for Bidding Central Plant & Energy Loop C. Tests and Inspections: 1. Visually inspect UTP and optical fiber jacket materials for NRTL certification markings. Inspect cabling terminations in communications equipment rooms for compliance with color-coding for pin assignments, and inspect cabling connections for compliance with TIA/EIA-568-B.1. 2. Visually inspect cable placement, cable termination, grounding and bonding, equipment and patch cords, and labeling of all components. 3. Test UTP copper cabling for DC loop resistance, shorts, opens, intermittent faults, and polarity between conductors. Test operation of shorting bars in connection blocks. Test cables after termination but not cross-connection. a. Test instruments shall meet or exceed applicable requirements in TIA/EIA-568- B.2. Perform tests with a tester that complies with performance requirements in "Test Instruments (Normative)" Annex, complying with measurement accuracy specified in "Measurement Accuracy (Informative)" Annex. Use only test cords and adapters that are qualified by test equipment manufacturer for channel or link test configuration. 4. Optical Fiber Cable Tests: a. Test instruments shall meet or exceed applicable requirements in TIA/EIA-568- B.1. Use only test cords and adapters that are qualified by test equipment manufacturer for channel or link test configuration. b. Link End-to-End Attenuation Tests: 1) Horizontal and multimode backbone link measurements: Test at 850 or 1300 nm in 1 direction according to TIA/EIA-526-14-A, Method B, One Reference Jumper. 2) Attenuation test results for backbone links shall be less than 2.0 db. Attenuation test results shall be less than that calculated according to equation in TIA/EIA-568-B.1. D. Data for each measurement shall be documented. Data for submittals shall be printed in a summary report that is formatted similar to Table 10.1 in BICSI TDMM, or transferred from the instrument to the computer, saved as text files, and printed and submitted. E. Remove and replace cabling where test results indicate that they do not comply with specified requirements. F. End-to-end cabling will be considered defective if it does not pass tests and inspections. G. Prepare test and inspection reports. END OF SECTION 27 13 00 COMMUNICATIONS BACKBONE CABLING Copyright 2011 Gensler 27 13 00-12

722CPFH SWC Central Plant Mechanical Systems and Energy Loop Project Bid No. 188 Addendum 04 12/22/2011 Prebid RFI Log RFI No. Subject Dwg Spec Discipline Originator Question Resp by Response Date in Date out Add No. 001 Valve locations M1.2, M1.5, M1.6 33 61 13 Mech West Coast Air Is it acceptable to move the In Line valves over to the nearest Anchor location to avoid having t add additional expansion loops? DEC Yes. This is acceptable. 12/7/2011 12/8/2011 001 002 Spec Clarification M5.2 33 61 13 Mech West Coast Air This specification paragraph requires that all fittings (elbows, tees, reducers, anchors) be factory pre fabricated. This conflicts with Detail 8 which shows the HHW ANCHOR as bare pipe. Do the anchors need to be provided epoxy coated, pre fabricated and preinsulated on the pipe from the manufacturer? DEC Yes. Epoxy coated, pre fabricated and preinsulated anchors to be provided by the pipe manufacture, 12/7/2011 12/8/2011 001 003 Factory Fabrication of spool pieces M1.2, M1.5, M1.6 33 61 13 Mech West Coast Air Due to the short CHW & HHW pipe offsets for the valves should these fittings be factory prefabricated as a custom spool to avoid having to cut into the pre fabricated/insulated fittings? DEC Yes. Fittings to be factory provided, prefabricated by the pipe manufacturer. 12/7/2011 12/8/2011 001 004 Crossover Tees M1.1, M1.2, M1.4, M1.5, M1.6 & M1.7 33 61 13 Mech West Coast Air Where the Tees are located would you prefer us to cut into the factory prefabricated fittings & insulation to keep the branch lines elevations lower or would you want factory pre fabricated spools with the elbows already welded to the Tees? DEC Provide factory, prefabricated spools with elbows already welded to the tees. 12/7/2011 12/8/2011 001 Page 1 of 12

722CPFH SWC Central Plant Mechanical Systems and Energy Loop Project Bid No. 188 Addendum 04 12/22/2011 Prebid RFI Log RFI No. Subject Dwg Spec Discipline Originator Question Resp by Response Date in Date out Add No. 005 Builders Risk General Condition s 1.34 West Coast Air I ve never performed a contract that required each trade contractor to supply individual builders risk policies. Is the CM not going to purchase one policy covering all construction? BBC Balfour Beatty Construction the CM will purchase the Builder's Risk Insurance for the project and this Bid Package # 23 is NOT to include the insurance cost in their bid. 12/7/2011 12/8/2011 001 Page 2 of 12

722CPFH SWC Central Plant Mechanical Systems and Energy Loop Project Bid No. 188 Addendum 04 12/22/2011 Prebid RFI Log RFI No. Subject Dwg Spec Discipline Originator Question Resp by Response Date in Date out Add No. 006 Sanitary Facilities General Condition s 1.63 West Coast Air Are we to supply sanitary facilities only for our workers or also for the other trade contractors BBC This mechanical bid package contractor shall supply sanitary facilities for the entire duration of the project for their own work and other trades. Sanitary facilities used on energy loop work shall be transported back to fenced in area at lot J on a daily basis. Sanitary facilities to be on trailer. 12/7/2011 12/8/2011 001 007 Special Bid Package #23 Notes 2.28.60 West Coast Air 2.28.60 Provide all mechanical work and civil worke.. Does this include grading, curb & gutter, asphalt & concrete around plant? BBC The building pad grading, curb and gutter, and concrete paving, around the central plant building as highlighted in yellow area is NOT included in Bid Package #23 work scope as depicted per RFI 007 Sketch C9.1See attached sketch. All grading, concrete work, asphalt work,patchback and all repairs beyond the highlighted yellow area on sketch C9.1 is by this Bid Package #23. Coordinate work with the construction manager. 12/7/2011 12/8/2011 001 Page 3 of 12

722CPFH SWC Central Plant Mechanical Systems and Energy Loop Project Bid No. 188 Addendum 04 12/22/2011 Prebid RFI Log RFI No. Subject Dwg Spec Discipline Originator Question Resp by Response Date in Date out Add No. 008 Special Bid Package #23 Notes 2.28.117 Roadway Barriers West Coast Air 009 Fire alarm 28 31 11 Elec Siemens 010 Excavation spoil storage C1 thru C 10 01 1200 Civil Jackson & Blanc We are not having luck finding 6 tall water filled barriers. Please elaborate sourcing as we have been told that Yodock barriers are much shorter than 6. Also, are these barriers required on each side of trench or only where potential traffic is encountered? BBC Will the fire alarm systems need to be connected to the EBI Server Will there be a temporary onsite location to stor spoils? Specifications call for contractor to tarp or heavy polyethylene and sandbag stock pile soils. During excavation all usable native soil will be stockpiled as backfill. Please confirm location for backfill spoils. Sparling BBC The Yodock system can be ordered in 32" or 42" height by 6ft length. The fencing that attaches to the top of the Yodock makes up for the 6ft height requirement as indicated on 2.28.117. The Yodock system can be rented. You may order fencing from Yodock or provide separately from a different source. The gree screen fencing can be ordered from a separate source as well. The fence assembly is by this bid package. The source contact number is Kathleen Yodock 9549315247 or Kathleen@yodock.com. Traffic Control Services is another vendor resource. The barriers are required on each side of the trenching. 12/7/2011 12/8/2011 001 The Fire Alarm system work is NOT included in this Bid Package and will be bid at a later date. However, the Fire Alarm System duct bank, conduits and pulllines are in this bid package #23 scope. See reply to RFI#18. 12/7/2011 12/8/2011 001 Maintain backfill spoils within fenced area of work or in Lot J south of DeVore Stadium. Area to be coordinated with Construction Manager and all SWPPP requirements shall be followed. 12/7/2011 12/8/2011 001 Page 4 of 12

722CPFH SWC Central Plant Mechanical Systems and Energy Loop Project Bid No. 188 Addendum 04 12/22/2011 Prebid RFI Log RFI No. Subject Dwg Spec Discipline Originator Question Resp by Response Date in Date out Add No. 011 Asphalt paving C1 thru C 10 32 12 16 Civil Jackson & Blanc Please provide thickness of asphalt around the campus loop road and parking lots. Please confirm the compaction requirements for road patchback areas is 95%. Please indicated the new thickness of asphalt required at the road patchback area. RBF Existing asphalt section is 4" AC over 12" Class II base. Compaction shall be 95% for patchback areas. New thickness of asphalt shall match existing section 4" AC over 12" Class II base. 12/7/2011 12/8/2011 001 012 CHW / HHW Underground Valve M1.4, M1.5, M1.6, M1.7 / 230523, Detail 336113, 6/M5.2 232113 Mech Jackson & Blanc Please provide butterfly Type and Model # of valve required for the U/G CHW and HHW Piping Indicated during the walk through that the ADA switchback ramp would need to be removed to allow the installation of the energy loop HHW / CHW piping. Please provide a detail of the ADA ramp required as it is not currently shown on the drawings. DEC Provide Kennedy Valve, Series 4500 with flanged connections, epoxy coating, worm gear operated with 2" nut. 12/7/2011 12/8/2011 001 013 ADA "Z" switchback RAMP Building 850 C2, C7 23 05 23, 33 61 13, 23 21 13 Civil Jackson & Blanc RBF Pipe alignment as per the drawings avoids the ramp and stairs. 12/7/2011 12/8/2011 001 014 U/G Hydronic Piping M1.2 1.7 33 61 13 Mech Jackson & Blanc Is ETF West an acceptable Manufacturer for the UG CHW / HHW piping? Is Permapipe and Rovanco the only pre approved manufacturers? Is Thermal Pipe Systems or Insul Tek a preapproved accpetable manufacturer for the UG CHW / HHW piping? DEC ETF West is acceptable provided they can meet the specification in full, particularly 1.4B, 1.5D, 3.4. 12/7/2011 12/8/2011 001 Page 5 of 12

722CPFH SWC Central Plant Mechanical Systems and Energy Loop Project Bid No. 188 Addendum 04 12/22/2011 Prebid RFI Log RFI No. Subject Dwg Spec Discipline Originator Question Resp by Response Date in Date out Add No. 015 U/G gas piping, hydronic piping and site utilities P1.0, C9, M1.1 Mech Jackson & Blanc There is a discrepancy between drawings P1 and C 9. The distance shown on C9 is greater than that shown on P1.0, are we to route the U/G gas piping according to P1.0 and stop with a cap for future expansion or route according to c9. Also for the Hydronic piping the distance is greater than that shown on M1.1 Are we to route according to C9 or M1.1 the U/G HHW / CHW piping? Gensler C9 shows horizontal control. Abide by the longest runs shown on C9. 12/7/2011 12/8/2011 001 016 BIM 3D modeling 01 12 00 19 BIM Jackson & Blanc Please confirm Bid Pack #23 is only responsible to BIM (3D coordination) the Central Plant mechanical systems above ground and not eh U/G hydronic energy loop or site utilities. Also please confirm the Mechanical is not the lead, that Balfour Beatty will be the FTP site host and structural stell and architectural backgrounds will be made available to the mechanical coordinator. BBC Bid Package #23 is responsible to BIM 3D modeling and coordination the central plant mechanical systems above ground and the underground hydronic HHW, CHW energy loop and other site utilities installed by this bid package such as electrical communications duct bank, storm drain, reclaimed water, gas, water, etc. Balfour Beatty Construction BIM Manager will host a FTP site and provide structural steel and architectural backgrounds to Bid Package BIM coordinator to abide by BIM Section 03124 and for BIM Modeling. 12/7/2011 12/8/2011 001 017 Above ground CHW and HHW 23 21 13 Mech Jackson & Blanc Are Mechanical joints acceptable for CHW and HHW above ground at the Central Plant DEC Per the specifications, mechanical joints are acceptable for CHW 10" and smaller. One exception is that mechancial fittings are to be provided as required for chiller servicing (1/M4.2). Mechanical joints are not acceptable for HHW piping. 12/7/2011 12/8/2011 001 Page 6 of 12

722CPFH SWC Central Plant Mechanical Systems and Energy Loop Project Bid No. 188 Addendum 04 12/22/2011 Prebid RFI Log RFI No. Subject Dwg Spec Discipline Originator Question Resp by Response Date in Date out Add No. 018 Fiber Optic Single Multi Mode FA2.1, E1.1, E1.2 Work scope 2.28.62 Elec Jackson & Blanc 1. Please clarify work scope section 2.28.62 that states Fiber Optic Cables, telephone, fire alarm cables are by another Bid Package trade. It was stated that single and multi mode fiber optics need to be pulled from CP IDF room to Building 210 and that adapters are provided by Campus IT. 2. Indicate how many Micron 50 or 60, and how many pair of BBC / single mode, multi mode. Sparling 1. Per Honeywell s direction, the network architecture per M 8.2detail 2 is accomplished by single & multimode fiber optic cables installed from Central Plant IDF to Server Room in Bldg 210 as witnessed at job walk and per plan E1.1. This Bid Package #23 will make Fiber connector terminations on all fiber optic cables and tested for working operation. Coordinate and use the type of fiber connections as specified by SWC IT Dept. The District will assign IT addresses for connection to Campus IT network architecture. Telephone and Fire Alarm duct bank, conduits with pull line are to be installed to the respective cabinets as witness per job walk. Telephone and Fire Alarm Systems work and cables are by another Trade Bid Package and will be bid at a later date. 2. The required type of multimode fiber should be 62.5 micron as specified in 27 13 00, 2.5(B). The quantity shall be as shown on E1.1. 12/7/2011 12/8/2011 001 Page 7 of 12

722CPFH SWC Central Plant Mechanical Systems and Energy Loop Project Bid No. 188 Addendum 04 12/22/2011 Prebid RFI Log RFI No. Subject Dwg Spec Discipline Originator Question Resp by Response Date in Date out Add No. 019 Construction fencing 01 12 00 / 2.28.91 Jackson & Blanc 1. Please clarify the Yellow Construction Area fencing along student parking, Otay lakes Road, H St. and the Site Access. Is this part of our scope? If so, what type of fencing is required. 2. Please provide a fencing layout for the Hydronic Energy Loop Piping routing which includes the main loop around campus road and the building branch piping runouts, and indicate what type of fencing is required. BBC 1. The yellow construction area fencing is NOT part of this Bid Package #23 scope of work. 2. Fencing layout for hydronic energy loop is from curb to curb per Phasing Plan dated 111511. Both lanes on the campus road will be closed for traffic. See Summary of Multiple Contracts 2.28.117 for YODOCK manufacturer fencing or equal and fencing type for lanscape areas. Coordinate Phase 1, Increments 3 & 4, and Phase 3 layout with Construction Manager. Provide additional 2,000 LF of temporarty fence 6' high on stands with windscreen for use at the discretion of the Construction Manager. 12/7/2011 12/8/2011 001 020 Controls 23 09 00 Mech UMEC Is the cost for the system integration as described in paragraph 2.2 A to be included by this Bid package or is this work direct to the owner? BBC The cost for controls system integration is by this Bid Package #23. See Section 011200, 2.28.83 for reference. 12/7/2011 12/8/2011 001 021 Storm Drain C9.1 Civil AO Reed Storm drain clean out does not provide rim height, only flow level 452.7. Please provide. RBF Rim elevation is 473.50 12/7/2011 12/8/2011 001 022 Addendum No. 1 AO Reed Shows Bid No. 187, we are Bid No. 188. Does this apply to 188? SWC If you received information regarding Bid 187 it was sent in error, please disregard and sorry for the inconvenience. 12/7/2011 12/8/2011 001 023 Summary of Multiple 011200 Constracts 1.1 01 AO Reed #2 says all plans stamp date 1032011. the website are 8 3011. Please advise if there are 1032011 plans. SWC Correct stamped plans were found by AO Reed per email to SWC. 12/7/2011 12/8/2011 001 Page 8 of 12

722CPFH SWC Central Plant Mechanical Systems and Energy Loop Project Bid No. 188 Addendum 04 12/22/2011 Prebid RFI Log RFI No. Subject Dwg Spec Discipline Originator Question Resp by Response Date in Date out Add No. 024 Labor Compliance Program 221116 UMEC Paragraph 1.30 of the Invitation to Bid reference the District Labor Compliance Program. Is this document available for review? SWC SWC supports and adheres to the Department of Industrial Relations Division of Labor Standards Ennforcement Public Works Manual which can be veiwed at: http://www.dir.ca.gov/dlse/man ualinstructions.htm 12/7/2011 12/8/2011 001 025 Reclaimed water 22 11 16 Mech UMEC Section 22 11 16 is title Domestic & Reclaimed Water Piping. No piping materials for reclaimed water piping are specified in paragraph 3.15 Piping Schedule. Please provide. DEC Match material of domestic water piping. Identify per 1617A of the CPC by labeling with purple (Pantone color #512) PVC mylartape along it entire length. 12/7/2011 12/8/2011 001 026 RFI's / Bid Date UMEC This is a complicated project and many of the subcontractors who will be participating are only now receiving the plans and specifications. Can the deadline for RFI's (and the bid date) be extended? SWC No. 12/7/2011 12/8/2011 001 027 Concrete Mechanical Equipment Pads S2.1, M5.1 Jackson & Blanc 028 C9.1 UMEC Please confirm Central Plant concrete contractor is furnishing and installing all foundation concrete pads as shown in detail 11 & * and this would include all the concrete pads shown on drawings S2.1 and M5.1 details 1 6 & 12 and also the CP concrete conctractor will include the SDG&E electrical gear and electrical cocnrete pads as shown on S2.1. Please provide clarification. BBC 2.28.113 Clarification: Provide concrete for all thrust locks and patchback work per Bid Package #23 conctract documents. A separate Concrete Bid Package will provide concrete pads for mechanical equipment. Bid package # 23 to coordinate with Concrete Bid Package and structural plans to ensure proper fit of mechanical equipment to structural concrete pads and pipe supports. 12/7/2011 12/8/2011 001 At SDCO, with piping 12" in and 12" out, Rim elevation 450.00 appears to be mislabled. Flow line in is 468.10 and flow line out is 468.30. Please clarify. RBF Rim elevation is 475.00 12/15/2011 12/22/2011 004 Page 9 of 12

722CPFH SWC Central Plant Mechanical Systems and Energy Loop Project Bid No. 188 Addendum 04 12/22/2011 Prebid RFI Log RFI No. Subject Dwg Spec Discipline Originator Question Resp by Response Date in Date out Add No. 029 Mechanic al UMEC Please see substitution request from Trane for chillers. DEC The Trane chiller does not meet the specification in regards to refrigerant and thus the sustitution request is denied. The example of energy savings provided is not accurate as the chillers will not be operating at full load for 2000 hours per year. This is very misleading information. A better analysis would be to use the NPLV of each chiller and the manufacturer should be aware of this. The District's facilities department, program manager, and engineering group decided on the refrigerant early in the design process and selected a refrigerant, R134, the basis of which was outlined in the schematic design phase based upon an Ozone Depleting Potential of ZERO, and the lack of current regulations phasing out the Trane chiller's refrigerant, R123, production by 2020. 12/15/2011 12/22/2011 004 030 Temp Controls UMEC 1) Per M1.7 & Sequence of Operation: Building 620 requires replacing valves, determining valve position, installing new Differential Pressure Sensor, updating programming, etc. Question A) What brand and version or type of existing DDC controllers are currently installed on these existing Air Handlers AHU1, 2, &3? DEC The existing controllers are Honeywell Excel 50s. 12/15/2011 12/22/2011 004 Page 10 of 12

722CPFH SWC Central Plant Mechanical Systems and Energy Loop Project Bid No. 188 Addendum 04 12/22/2011 Prebid RFI Log RFI No. Subject Dwg Spec Discipline Originator Question Resp by Response Date in Date out Add No. Question B) Do these AHU controllers have additional point capacity allowing for the additional AHU points as well as the DP sensor input required for the Central Plant Pump VFD speed control? Assume new native BACnet controller will be required to accept the additional inputs. 2) Per M8.2 Sequence of Operations: "Primary Chilled Water Pumps & Secondary Heating Hot Water Pumps" These sequences Differential Pressure Sensors located at "The Entry to the Corner Lot". Question: Is Division 16000 providing underground conduits, 120VAC and/or and Ethernet connection to these points? Typically the Controls Contractor doesn't engage in underground cabling activities and power to remote points. 3) Per M8.1, "Heating Hot Water System" detail, this controller detail indicates a Natural Gas Meter being furnished for each Boiler (five total). Question: please confirm the requirement for (5) individual gas meters or a single gas meter providing the Gas consumption for all (5) boilers. No work required for this. Communcation will come from the Corner Lot controls through the campus IT network. Provide gas meters per plan. One per boiler per District Facilities direction, (5) total. 4) RE: Outside & Outdoor Exposed ConduitL Is EMT compression conduit acceptable for DDC conduit or is rigid IMT required? RE: Interior Central Plant DDC Control Conduit: Is EMT acceptable or IMT acceptable? EMT is acceptable for DDC conduit inside and outside. 115 Volt power to the controller transformers is to be per Div 26 Specifications. Page 11 of 12

722CPFH SWC Central Plant Mechanical Systems and Energy Loop Project Bid No. 188 Addendum 04 12/22/2011 Prebid RFI Log RFI No. Subject Dwg Spec Discipline Originator Question Resp by Response Date in Date out Add No. 031 Mechanic al UMEC The freestanding condenser water piping supports in the cooling tower yard are detailed on both the mechanical drawings (4/M5.2) and the structural drawings (12/S4.1) Which bid package is responsible for the supports shown on 3/S5.3 including the "mech beam"? BBC This Bid Package #23 Contractor is responsible for furnishing and installing the ENTIRE piping supports with lengths as required and described in detail 4/M5.2, detail 12/S4.1 and detail 3/S5.3. The concrete base and reinforcing depicted in detail 12/S4.1 is by separate concrete Bid Package. This Bid package #23 Contractor shall provide welding, anchoring, coordinate and cooperate withe other Bid package Contractors. 12/15/2011 12/22/2011 004 032 Concrete Work END RFI's C5, C2, C 7. Bid Pack #23 HVAC Scope Jackson & Blanc The CHW / HHW Trench will be approximately 6 8 feet wide, looking at drawing C5 are we to include concrete for the entire area shown as depicted in the detail, this is a considerable amount more yards of concrete and would not be required if just patching back the trench. This increased area for concrete also happens on drawing C2 & C7. Please clarify. Gensler Provide concrete work as indicated per C2, C5, and C 7 plans. 12/15/2011 12/22/2011 004 Page 12 of 12