AgdaPkt 2016-05-09 Interview, Closed and Joint SA PFA

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6.1.C. - Page 1 REPORT To the Honorable Mayor and City Council From the City Manager May 9, 2016 SUBJECT Award of Contract — Cathodic Protection Upgrade of the Recycled Water First Steps Pipeline Project RECOMMENDATION By motion, approve the contract documents and award the standard form construction contract (Section 00520) for the Cathodic Protection Upgrade of the Recycled Water First Steps Pipeline Project to Corrpro Companies, Inc. of Hayward for their responsive and responsible low bid of $129,842.00; and, authorize the City Manager to increase the contract amount, if necessary, up to 10% of the original contract amount, not to exceed $142,826.20. Confirm California Environmental Quality Act (CEQA) exemption criteria as set forth in Section 15301 (Existing Facilities) and Section 15302 (Replacement or Reconstruction) of the CEQA Regulations BACKGROUND The City periodically replaces anodes and test stations of aging the recycled water infrastructure to ensure the continued reliability of the system. Galvanic anodes are highly active metals that are used to prevent a less active metal surface from corroding. The anode material will be consumed first, in place of the metal it is protecting. Galvanic anodes have an approximate design life of 25 to 30 years. The Recycled Water First Step Pipelines were built in the late 1980's and the galvanic anodes are due for a replacement. Staff has identified galvanic anodes that are at or close to the end of design life and targeted cathodic protection stations (cathodic protection is a technique used to control the corrosion of a metal surface)for improvement. This will extend its life for another 25 to 30 years. ANALYSIS Testing, evaluation and reporting of the galvanic anode cathodic protection systems at forty five (45) locations on the City's Recycled Water Pipeline at the Redwood Shores Community were completed in 2012 and 2014. Staff's review of the two reports revealed that many of the galvanic anodes were at or close to depletion and at the end of their design life. A number of construction options for repair/replacement have been evaluated by staff to determine the most cost-effective method of mitigation. For this project, augured or vacuumed hole drilling has been chosen in order to install the new anodes.