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File Number: 16-100 <br />of construction. One of these items has been the discovery of the need to repair a sanitary <br />sewer main on Marina Boulevard just east of San Leandro Boulevard that was damaged with <br />the installation of a communications conduit. This additional item repairs a void in the street <br />surrounding the break in the sewer main. Other changes have been made to address <br />problems, obstructions, or other issues discovered during construction as excavations were <br />made. <br />As the resolution awarding the construction contract did not include language allowing for <br />contract change orders, on September 8, 2015, by Resolution No. 2015-153, the City Council <br />authorized Contract Change Orders up to 25% of the subject contract to address <br />miscellaneous urgent repairs as described above. The current request would authorize an <br />increase in the change order cap to 40% to allow for prior changes in the project scope and <br />also to include the following urgent repair items in the contract: <br />a) Sewer main replacement on West Juana Avenue between San Leandro Boulevard and <br />Carpentier Street: <br />The existing 12-inch diameter sewer main is in extremely poor condition and is in need <br />of replacement. The Marea Alta housing development requires this sewer main to <br />connect its sewer service laterals. During the connection process for the development, <br />the deteriorated condition of this sewer main was identified. In compliance with the <br />City’s Sanitary Sewer Master Plan this line will be upsized to a 16-inch pipe, which <br />provides both an immediate remedy and addresses future demands. The Marea Alta <br />development, which is an essential component of the Transit Oriented Development <br />(TOD) strategy for Downtown San Leandro, cannot be finished without completing this <br />work. <br />b) Emergency repair of sewer force main line at the intersection of Merced Street and <br />Fairway Drive: <br />10-inch diameter and 14-inch diameter sewer force mains transport sewer flows from <br />Wicks and Merced Pump Stations to gravity lines on Marina Boulevard. In late 2015, <br />while retrofitting its gas distribution line, PG&E damaged the 10-inch force main and <br />immediately made repairs. Recently, staff observed leaks from the 10-inch force main, <br />in the vicinity of the prior PG&E repairs. Based on mutual agreement and to ensure the <br />repairs are expedited and properly completed, the City will make the repairs, which <br />PG&E will reimburse if the leak is attributable to their prior work or repairs. Though all <br />flows to the 10-inch force main line are currently rerouted to the 14-inch main, it is <br />imperative that both mains are in service during this El Niño period. The consequences <br />of not having the 10-inch line available to take on heavy flow include a high risk of <br />backup and flooding. <br />Analysis <br />Authorization is needed for additional change orders to complete construction for the subject <br />project and make repairs to these vital facilities. <br />a) Sewer main replacement on West Juana Avenue between San Leandro Boulevard and <br />Carpentier Street: <br />Bids were requested from three contractors for the sewer main replacement on West <br />Page 2 City of San Leandro Printed on 3/29/2016