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Work Plan for Limited Soil and Groundwater Investigation as Part of Property Transaction at 2059 Navy Drive in Stockton, California. Background Information The following summary of background information for 2059 Navy Drive in Stockton, California (the Site; Figure 1) is based on a review of the Phase I Environmental Site Assessment (ESA) Report completed for the Concrete Batch Plant (April 14, 2004), and the Report on Former Diesel Tank Removal Soil and Pit Water Sampling completed for Nelson Ready Mix (March 8, 2004). ■ Activities conducted on-site include mixing cement, fly-ash, aggregates, and chemical additives, and filling cement-mixer trucks for off-site delivery ■ A 4,000-gallon underground storage tank(UST) was removed from the site in 1993 1. ■ A water well used for concrete production is located on-site Proposed Field Investigation ARCADIS proposes to advance three soil borings at the Site, as part of a property transaction screen. Prior to initiating the field activities,ARCADIS will perform the following tasks: ■ Get the appropriate permit from the San Joaquin County Environmental Health Department. ■ Prepare a site Health and Safety-Plan (HASP) in accordance with the Occupational Safety and Health Administration(OSHA) and the California Occupational Safety and Health Administration (Cal-OSHA) regulatory requirements. The HASP will incorporate site-specific considerations including known hazards, emergency evacuation routes, emergency response procedures, and the location of the nearest hospital. The HASP will be communicated to all project staff. ■ Retain a utility locating service to provide clearance of all boring locations in advance of the drilling activities. Underground Service Alert (USA) will also be contacted to confirm that no underground utilities are within the boring locations. Three direct-push borings will be advanced adjacent to the former UST location,to determine if surrounding soil was impacted by the contents of the UST. Two of the direct- push borings will be advanced southwest of the former UST, and the third will be advanced to the northeast. The temporary soil borings will be installed at the three locations described above using GeoprobeTM sampling equipment, operated by Precision Sampling, Inc., a licensed drilling contractor. The GeoprobeTM sampling rig utilizes hydraulically actuated equipment to drive a hollow, cylindrical drive casing into the ground. I