30. (20-0794) Recommendation to authorize City Manager, or designee, to execute a fourth amendment to Contract No. 34265 with West Coast Arborists, Inc., of Anaheim, CA, for as-needed tree trimming services, to extend the term through March 31, 2021, and increase the amount by $3,400,000, for a revised total amount not to exceed $11,340,000. (Citywide)