17. (13-1012) Recommendation to authorize City Manager to execute all documents necessary to amend Contract No. 30939 with West Coast Arborists, Inc., of Anaheim, CA (not an MBE, WBE, SBE or Local), for providing as-needed tree trimming services, in an additional amount of $1,165,000 for a revised total not to exceed $7,160,000, and extend the contract term to June 1, 2014; and Authorize City Manager to execute all documents necessary to amend Contract No. 31907 with Trimming Land Co., Inc., of South Gate, CA (MBE), and Contract No. 31906 with United Pacific Services, of La Habra, CA (not an MBE, WBE, SBE or Local), for providing as-needed tree trimming services, in an additional amount of $200,000, for a revised total not to exceed $1,460,000, and extend the contract term to June 1, 2014. (Citywide)