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# <br />Service Area/Item Description <br />BASIC <br />ADDITIONAL SYSTEM <br />an additional system service. <br />SYSTEM <br />SERVICES <br />5 <br />Mounting System <br />Mounting System, Support Structure <br />Visually inspect support posts and structural <br />5.1 <br />components for evidence of rust, corrosion, <br />Annually <br />settling and tilt <br />Mounting System, Hardware <br />5.2 <br />Visually inspect hardware for tightness and <br />Annually <br />evidence of rust and corrosion <br />Grounding <br />Inspect and test rack grounding, check for torque <br />levels, re -torque as necessary. Measure and record <br />earth to ground resistance between rack and <br />ground rod with low- resistance ohmmeter. <br />5.3 <br />Annually <br />Tracking Systems <br />Perform manufacturer -recommended maintenance <br />on single -axis trackers including, but not limited <br />to: <br />Inspection for evidence of <br />wear, moisture intrusion, loss of lubrication, or <br />distortion/damage in all motor drive/gearbox <br />assemblies, bushings/bearings, linkage and torque <br />tubes, <br />Calibration of <br />sensors/tracker (calibration to be paid by <br />Customer as Additional Service), <br />Inspection of electronic <br />enclosure seals for integrity, <br />Perform inspection and <br />lubrication of gearboxes/slew drives. <br />5.4 <br />N/A <br />Tracking Systems <br />Inspect tracker systems following the <br />manufacturer's recommendations including, but <br />not limited to, inspecting for evidence of wear, <br />moisture intrusion, loss of lubrication, or damage <br />in all motor drive/gearbox assemblies, <br />bushings/bearings, linkage and torque tubes. <br />5.5 <br />N/A <br />6 <br />DC Combiner <br />Confidential & Proprietary Information of Ameresco, Inc. Page 50 of 56 <br />