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4.0 Scope of Work <br /> To achieve the project objective, the following scope of work will be conducted: <br /> 1. Permitting and Mobilization <br /> 2. Field Investigation <br /> 3. Laboratory Analyses <br /> 4. Investigation-Derived Waste Disposal <br /> 5. Site Investigation Report Preparation <br /> i <br /> 4.1 Permitting and Mobilization <br /> Permits for the soil and groundwater investigation will be obtained from the San Joaquin County <br /> i <br /> Environmental Health Department. A Caltrans permit to enter is also required for this <br /> investigation. Underground Service Alert will be notified of the subsurface investigation at least <br /> 48 hours prior to initiation of the.investigation. <br /> Prior to the initiation of fieldwork, a site health and safety plan will be prepared in accordance <br /> with 29 CFR 1910.120. The health and safety plan will include safety procedures for work to be <br /> performed at the site, chemical hazard information, site safety officers, and preferred medical <br /> emergency.locations. All work done on site will be in accordance with the health and safety <br /> plan. <br /> 4.2 Field Investigation <br /> This task will include the emplacement of one boring for collection of soil samples and one <br /> boring for collection of discreet groundwater samples. The boring locations were selected by <br /> Caltrans to provide data for determining the vertical extent of contamination (Figure 2). <br /> Drilling and sampling procedures are presented in Appendix A. <br /> f <br /> 4.2.1 Drilling and Soil Sampling <br /> The soil borings will be advanced using Geoprobeo, direct-push, sampling equipment. The <br /> sampling equipment will be mounted a truck mounted rig. The soil boring will be advanced to a <br /> PP <br /> depth of approximately 30 meters (100 feet) below ground surface (bgs). <br /> P <br /> At the boring location approximately 20 soil samples will be collected at a 1.5 meter (5 feet) <br /> interval to the maximum depth of 30 meters. Soil samples will be collected using an <br /> approximately 2.5-centimeter (1-inch) diameter sampler lined with an acetate sample tube. Soil <br /> samples retained for hazardous materials testing shall be 15 to 17 centimeters (6 to 8 inches)in <br /> SnCDP-N:\rincfp APmjeclABM35278�wkpin&hsp\CadiCPT_wkp.doc 4-1 <br /> 2/4N2 <br />