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BACKGROUND The City of Pleasanton has an extensive pavement preservation program that annually resurfaces city streets. There are two main types of projects: an annual slurry seal project that installs an application of slurry seal used to rejuvenate pavement surfaces that are in good condition while extending the useful life, and an annual resurfacing project that reconstructs streets that are in poor to fair condition with a new layer of asphalt paving. On June 6, 2017, City Council awarded the Annual Slurry Seal of Various Streets Project, CIP No. 16504, to American Asphalt Repair & Resurfacing Company, Inc. for the low bid amount of $484,575. The project consisted of applying slurry seal coating to approximately 2,616,000 square feet of pavement on sections of 87 city streets. As part of the award, City Council also authorized the Director of Engineering to approve and execute changes orders up to a not-to-exceed amount of $50,000 (the remaining project budget) for unforeseen conditions discovered during construction. The project began construction in fall 2017, but due to an early cold snap and rain causing poor conditions for slurry seal installation, the project went into winter suspension. Work resumed in June 2018 and continued through July. During the 2018 slurry placement, hotter than anticipated weather occurred that caused some of the slurry seal material to remain soft and malleable longer than expected. Due to the material remaining softer longer than anticipated, normal vehicle traffic created excessive scarring and blemishing of the newly sealed street surfaces. The City and the contractor had numerous specialists review the streets and test the material because the material stayed malleable for so long. The results indicated that the material was within specification requirements, and the specialists recommended providing more time for the material to cure. The material did finally cure toward fall 2018, but the scarring of the street surface had already occurred. The scarring was aesthetically unpleasing but did not change the serviceability of the slurry sealed surface. On March 19, 2019, City Council authorized the transfer of $28,600 from the Annual Slurry Seal Project, CIP No. 18504, and $13,630 from City Parking Lots Resurfacing Project, CIP No. 17424, to pay for the additional Type I slurry seal installation and work at the Augustin Bernal Park parking lot. In addition, the Director of Engineering was authorized to approve and execute contract change orders up to the not-to-exceed amount of $85,213. DISCUSSION The work completed by American Asphalt Repair & Resurfacing Company, Inc. consisted of installing 2,615,447 square feet of pavement on sections of 87 city streets and resurfacing the Augustin Bernal Park parking lot for a total of $568,286.19. The project also included the installation of Type I slurry in the Valley Trails neighborhood and on Sandpiper Way to address aesthetic concerns due to the original application curing slowly. As part of the City's Preventative Maintenance Program, the project is expected to extend the life of the streets by eight to ten years through sealing the street and improving roadway surface traction. Slurry seal surface treatment extends the life of a Page 2 of 6