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REV: 08-14-25 LF Exhibit A of this Agreement, Consultant shall follow the procedures outlined in the RWQCB approved workplan. Task 3.1 - Task Management & Field Preparation Consultant shall implement the soil vapor investigation workplan by conducting pre- construction planning and pre-field activities in coordination with the City. Once the workplan and access agreements are finalized, Consultant shall submit for the City’s review a proposed schedule, pre-construction plan, schedule a pre-construction site meeting with the City, and an implementation plan. Prior to implementing the workplan, Consultant shall prepare a site-specific health and safety plan for the field work in accordance with applicable regulations. Consultant shall conduct a site visit to mark drilling locations for Underground Services Alert notification. Consultant shall clear proposed boring locations by determining the locations of all subsurface utilities that could potentially be impacted by the Consultant’s work. If any boring locations need to be adjusted due to access limitations, presence of utilities or equipment, and/or surface conditions, Consultant shall inform and obtain the City’s approval before making adjustments. Consultant shall schedule all subcontractors, obtain sampling equipment from the laboratory, notify the property owners of the work, establish staging areas, and place no parking signs and any other appropriate traffic control measures in the parking areas prior to initiating the work. Consultant must provide advance notification to the City prior to beginning any work on site, describing the anticipated activities to be performed and start and end dates and times. Based on prior and existing access agreements, Consultant will prepare to conduct all field work at night, which includes but is not limited to soil vapor well installation and soil vapor sample collection, unless otherwise directed by the City. Consultant must notify the City immediately if there are any unexpected issues that occur onsite. Task 3.2 – Soil Vapor Well Installation Consultant shall install soil vapor wells. Consultant shall have a Professional Geologist observing all drilling activities that are conducted. Consultant shall use a rig to advance an outer-drive rod casing at a diameter as approved by the RWQCB lined with acetate sampling sleeve in which the soil core is retained and brought to the surface. Consultant shall geologically log continuous core soil samples using the Unified Soil Classification System and screen for volatile organic compounds using a photoionization detector. Consultant shall install a total of approximately 12 soil vapor wells by advancing a boring at specific diameter, depths, and locations as approved by the RWQCB. If approved by the City, Consultant may hand augur for the first five feet of depth or the full depth instead of using direct-push if it is necessary to avoid damaging subsurface utilities. Consultant shall insert into the borehole filter pack sand and a Teflon tube with a non-reactive screen. ATTY/AGR.2025.210/Farallon Consulting, LLC (Soil vapor investigation & groundwater sampling) (Page 12 of 19)