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8.A. - Page 112 <br /> Exhibit B. Engineering and Construction Requirements <br /> Proposed roof top mounted systems may be ballasted,standing seam attachment,or penetrating <br /> systems and must meet or exceed the following requirements: <br /> • Systems shall not exceed the ability of the existing structure to support the entire solar <br /> system and withstand increased wind uplift and seismic loads. The capability of the <br /> existing structure to support proposed solar systems shall be verified by Seller prior to <br /> design approval. <br /> • Roof penetrations, if part of the mounting solution, shall be kept to a minimum. <br /> • Seller shall perform all work so that existing roof warranties shall not be voided, <br /> reduced, or otherwise negatively impacted. <br /> • No work shall compromise roof drainage, cause damming or standing water or cause <br /> excessive soil build-up. <br /> • All materials and/or sealants must be chemically compatible. <br /> • Thermal movement that causes scuffing to the roof must be mitigated as part of the <br /> mounting solution. <br /> • All penetrations shall be waterproofed. <br /> • Detail(s)for the sealing of any roof penetrations shall be approved in writing to the <br /> Buyer, as well as the manufacturer of the existing roofing system, as part of system <br /> design review and approval—prior to Seller proceeding with work. The Buyer will make <br /> available the roofing manufacturer for each building for consultation with Seller as part <br /> of the design process. <br /> • All roofing penetrations and waterproofing shall be performed or overseen by a licensed <br /> roofing contractor who is certified by the roofing materials manufacturer for the specific <br /> materials or systems comprising each roof upon which a solar system will be installed. <br /> The roofing contractor shall also be safety prequalified by the Buyer. <br /> • As part of the design submittals, Seller shall include signed certificates from the roofing <br /> manufacturer stating: <br /> o The roofing contractor is certified installer of Complete Roofing System. <br /> o The manufacturer's Technical Representative is qualified and authorized to <br /> approve project. <br /> o Project Plans and specs meet the requirements of the warranty of the Complete <br /> Roofing System for the specified period. <br /> o Existing warranty incorporates the new roofing work and flashing work. <br /> • Any damage to roofing material during installation of solar systems must be remedied <br /> by Seller. <br /> • The installation of PV modules, inverters and other equipment on building roofs will be <br /> designed to minimize visibility of the equipment from the ground. <br /> Exhibit B Page 12 <br />