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February 19, 2021 Mr. Olivier Theard Page 3 SLR International Corporation slrconsulting.com SCOPE OF WORK The following three tasks are proposed for the Tier I scope of work. Task 1: Pre-Field Activities SLR will negotiate Site access and contact and schedule subcontractors needed to complete the scope of work described in this Work Plan. SLR will also acquire all field supplies that may be required and assess site- specific conditions to achieve appropriate sampling locations. This scope of work assumes the advancement of ten soil borings employing the MiHPT probe. Approximate locations for the proposed borings are shown on Figure 2. Four locations are proposed along the sewer alignment and six locations are proposed in the main parking area. The exact number and locations of the soil borings may be adjusted as necessary, based on the results of the sewer line inspection (described in Task 2) and field observations. SLR will schedule drillers for the advancement of the soil borings. SLR will submit a boring permit application and workplan, pay applicable permit fees, and obtain a permit for all proposed drilling activities from the San Joaquin County Environmental Health Department (SJCEHD). SLR will also update the site-specific Health and Safety Plan (HASP) to describe the protocols and procedures to be followed to minimize accidents, injury, and health risks for SLR personnel and others working at the Site. Task 2: Field Activities After receipt of drilling permits from the SJCEHD, SLR will initiate the following activities: • Notify Underground Service Alert (USA), the State of California’s one-call notification center, a minimum of 48 hours prior to the start of drilling activities. In addition, a private geophysical utility locator will be contracted to clear the selected locations of subsurface utilities or obstructions. The boring locations will be adjusted in the field, as necessary, based on USA markings and the private geophysical utility locator findings. • Conduct a closed-circuit television (CCTV) inspection of the sewer line from the dry cleaner to the sewer alignment in the alley and then along the alignment in the alley to identify any potential damaged/cracked areas that would indicate potential source areas for contamination to soil/groundwater. • Advance ten soil borings utilizing a MiHPT probe to a maximum depth of 25 ft bgs to determine the extent of VOC impacts in soil, soil vapor, and groundwater. Approximate soil boring locations are shown on Figure 2. • Install and sample additional soil vapor probes and sub slab vapor pins.