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4. SCOPE OF WORK 4.1 Pre-Field Activities Prior to conducting drilling and sampling activities, Geosyntec will perform the following pre-field activities: • Obtain the necessary drilling permits from the San Joaquin County Environmental Health Department(SJCEHD); • Conduct an underground utilities survey in the vicinity of the proposed boring locations with a private utility locator; • Notify Underground Services Alert (USA) a minimum of 48 hours prior to drilling; and • Coordinate activities with drilling, waste disposal, and analytical laboratory subcontractors. Per the SJCEHD permitting requirements, access authorization has been obtained from the current property owner, Prologis, and is included in Appendix A. A Health and Safety Plan(HASP) is provided in Appendix B. 4.2 Soil Sampling and Analysis Following completion of pre-field activities, a California licensed drilling contractor will mobilize a direct-push drill rig to the Site to advance the soil borings and conduct soil and grab groundwater sampling in accordance with the Sampling and Analysis Plan presented in Table 1. A total of four soil borings (GSB-1 through GSB-4) will be advanced during the investigation (Figure 2). Soil borings GSB-1 through GSB-3 will be advanced to groundwater (estimated to be approximately 20 feet below ground surface [bgs]) and soil boring GSB-4 will be advanced to 8 feet bgs. Each boring will be continuously cored during the advancement of each borehole and logged for lithology by a Geosyntec field geologist or engineer under the direction of a California Professional Geologist. Borings will be advanced by a direct push drill rig equipped with a dual-tube direct-push sampling system. Dual-tube sampling systems consist of an outer drive casing and an inner soil sample liner. The drill rig advances the outer casing and inner liner simultaneously, collecting the soil core sample in the sample liner. The sampler is then retrieved while the outer casing remains in place, protecting the integrity of the borehole. A new sampler is loaded into place and 20131115 Manteca Phase II Work Plan 6 11.15.2013