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<br />Finance and Administrative Services Department – Purchasing Division <br />ITB Addendum No.4 <br /> <br /> <br />March 25, 2026 <br /> <br />ORANGE COUNTY ITB No 367-OC 5473 <br /> <br />Cedar Grove Community Center Solar Installation <br /> <br /> <br />This Addendum shall be included in the contract for the above-referenced project. All General, Supplementary, and Special Conditions, <br />etc., as originally specified or as modified below, shall apply to these items. <br /> <br /> <br />Clarifications: <br /> <br />For the monitoring system, a hard-wired data connection must be made within the network closet in Room 117. Contractor to <br />run ethernet cable to the network closet. Final data connection to be coordinated with the Orange County IT Department. <br /> <br />A bidder asked whether lightning protection was required as part of the solar installation. The answer is no. Section 19 of the <br />Photovoltaic System Specifications applies only when lightning protection is pre-existing. <br /> <br /> <br />Substitution Requests: <br /> <br />The module substitution request for Hyundai Solar HiN-T595NI 595W is approved. <br /> <br />The module substitution request for ZNSHINE Solar ZXM7-UHLDD144 – 590W is denied. <br /> <br />The module substitution request for SERPHIM Solar SRP-590-BTA-BG – 590W is denied. <br /> <br />The racking substitution request for IronRidge BX Chassis 10 is denied. This racking system does not meet the Photovoltaic <br />System Specifications Section 8 – Mounting Systems. <br /> <br /> <br />RFI Responses: <br /> <br />RFI 1: Please confirm whether Prevailing Wage, Davis -Bacon, apply to this project. <br />Answer: Please refer to Addendum 3 – Davis Bacon Prevailing Wages are required for Cedar Grove. The applicable Wage <br />Determination Letter was provided with Addendum 3. <br /> <br />RFI 2: Is attic stock required on this project for solar modules? <br />Answer: Orange County requests that (5) spare modules be provided for attic stock. The modules should be stored on site at <br />Cedar Grove and labelled to note they are associated with the Cedar Grove Community Center solar project. <br /> <br />RFI 3: Please confirm the Panel Schedule or catalogue number of Panel MDP 1200A MLO. <br />Answer: The panel schedule from the 2014 As-Built drawings for the Cedar Grove Community Center has been added as an <br />attachment to this Addendum 4. <br /> <br />RFI 4: Please confirm if lightning protection already exists on the building. <br />Answer: There is no existing lightning protection on the building. <br /> <br /> <br /> <br /> <br />Attachments: <br /> <br />Docusign Envelope ID: CF064D56-F89A-8651-8229-D168AFF8B909