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31 August 2018 AdvancedGeo <br /> AGE Project No. 14-3002 E nvironmental <br /> Page 2 of 7 <br /> • Soil boring advancement and collection of soil samples, waste samples and <br /> groundwater samples (as encountered). <br /> • Sample analyses. <br /> • Monitoring well installation, development, and survey. <br /> • Report preparation including a Site Conceptual Model of the site. <br /> Each of these tasks is described in greater detail below. <br /> 3.1 . PRE-FIELD WORK ACTIVITIES <br /> Applicable drilling permits will be obtained from the San Joaquin County Environmental <br /> Health Department (SJCEHD). In addition, a health and safety plan will be updated in <br /> accordance with Occupational Safety and Health Guidance Manual for Hazardous Waste <br /> Site Activities (National Institute for Occupational Safety and Health Administration, U.S. <br /> Coast Guard and U.S. Environmental Protection Agency, 1985). <br /> Prior to mobilization, each proposed boring location will be clearly marked, and a utility <br /> clearance obtained through Underground Service Alert. As the waste may contain minor <br /> metal debris and had previously been evaluated by a Geophysical survey, an expanded <br /> magnetometer survey is proposed for the southern half of the site. A summary report of <br /> the geophysical details will be supplied to the Regional Board to verify the proposed <br /> locations of soil borings. Additionally, proposed boring locations will be finalized following <br /> CVRWQCB review of the Site Historical Activity Report (amended in August 2018). <br /> 3.2. SOIL BORING ADVANCEMENT AND ANALYSIS <br /> All field procedures will be overseen by an AGE representative under the supervision of <br /> a California Professional Geologist. Procedures for the advancement of soil borings, <br /> sampling, equipment decontamination, sample shipment, and monitoring well installation <br /> activities are outlined below. <br /> 3.2.1 . Soil Boring Advancement <br /> Proposed soil borings will be advanced utilizing a direct-push drilling rig equipped with <br /> 1 .5-inch diameter hollow-probing rods. The direct-push drilling rig advances soil probe <br /> borings using a hydraulic hammer to drive soil sampling tools to specified depths. Initially, <br /> a total of 24 soil borings will be advanced across the site to define and evaluate the waste, <br /> soil and groundwater. Borings will be advanced to depths of approximately 15 feet bsg. <br /> Proposed boring locations are illustrated in Figure 2. <br />