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Geomatrix <br /> be conducted under the supervision of a California professional geologist or registered <br /> engineer. <br /> 5.1 PRE-FIELD ACTIVITIES <br /> Prior to initiating field sampling, several pre-field activities will be completed. Pre-field <br /> activities include preparation of a site-specific health and safety plan,permit procurement, <br /> project coordination, subcontract preparation and scheduling, and completion of a utility <br /> clearance for subsurface sampling locations. Pre-field activities are described in the following <br /> sections. <br /> 5.1.1 Site Health and Safety Plan <br /> The existing site-specific health and safety plan (HASP)will be used during the field activities <br /> to be performed by Geomatrix personnel and its subcontractors. The HASP will address the <br /> potential risks to the personnel performing the sampling activities proposed for the site. <br /> 5.1.2 Permits, Coordination,Subcontractor Scheduling <br /> Upon approval of the Work Plan, Geomatrix will obtain permits from the San Joaquin County <br /> Environmental Health Department (SJCEHD) for the six soil borings that will be advanced to <br /> approximately 10 feet bgs. Geomatrix will coordinate site access and field logistics with site <br /> representatives at each Facility. Once site access is organized, Geomatrix will finalize the <br /> schedule with site personnel, coordinate with sampling and laboratory subcontractors, and mark <br /> the proposed boring locations with white spray paint for Underground Service Alert (USA) <br /> notification. <br /> 5.1.3 Utility Clearance <br /> Prior to initiating the field activities, USA will be notified at least 48 hours prior to the start of <br /> subsurface work at each Facility. In addition, Geomatrix may retain a private utility locating <br /> subcontractor to screen the proposed sample locations prior to commencing field activities. <br /> Soil boring locations may be adjusted in the field to account for the location of utilities and <br /> subsurface structures. <br /> 5.2 DRILLING AND SOIL SAMPLING <br /> Three soil borings will be advanced below the footprint of each of the two stockpiles. The <br /> proposed soil boring locations are shown on Figures 2 and 3. Each boring will be advanced <br /> using direct push drilling methods to a depth of approximately 10 feet bgs. The depth of each <br /> boring was selected to evaluate the vertical extent of potential diesel, Cr, and Cr VI impacts in <br /> P:\l0626.000.0\Docs\MLT Soil Work Plan.doc 7 <br />