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18 July 2008 <br /> AGE-NC Project No. 95-0137 <br /> Page 3 of 6 <br /> 2.0. SCOPE OF WORK <br /> AGE proposes to advance three soil probe borings at the 4!site to characterize the soil vapor <br /> concentrations and evaluate the potential for soil vapor intrusion.Additional soil vapor borings and <br /> samples may be required based on the frequency of significant detections; detection of <br /> concentrations which exceed compliance thresholds should be confirmed with additional samples. <br /> The scope of work will consist of the following tasks: <br /> • Pre-field work activities; <br /> • Geoprobe advancement and soil vapor sample collection; <br /> • Soil vapor sample analysis; <br /> • Review and analysis of soil vapor data; and i <br /> • Report preparation. <br /> �h <br /> 2.1. PERMITTING AND PRE-FIELD WORK ACTIVITIES <br /> A site specific health and safety plan will be prepared in accordance.',with Occupational Safety and <br /> Health Guidance Manual far Hazardous Waste Site Activities,(National Institute for Occupational <br /> j Safety and Health Administration, U.S. Coast Guard and U.S. Environmental Protection Agency, <br /> 4 1985). Prior to mobilization, each proposed soil probe boring location will be clearly marked and <br /> an utility clearance obtained through Underground Service Alert. <br /> a <br /> 2.2. PROBING AND COLLECTION OF SOIL VAPOR SAMPLES <br /> fb <br /> Based on soil results from past borings (see Quarterly Report- Fourth Quarter 2003, dated 05 <br /> January 2004), AGE proposes the advancement of three soil probe borings to evaluate vapor <br /> intrusion at the site (see Figure 2). Each soil probe boring will be advanced to.a depth of four feet <br /> { bsg. Soil vapor samples will be collected from each boring at three toTour feet bsg.Field procedures 1 5 <br /> for advancement of borings and collection of soil vapor samples are presented in Sections 3.1 and <br /> 3.2. <br /> I <br /> Soil vapor samples will be analyzed by a State of California Department of Public Health Services <br /> -certified laboratory for the following constituents: <br /> • Total petroleum hydrocarbons as gasoline (TPH-g) in accordance with T03; l <br /> Advanced GeoEnvironmental,Inc. k <br />