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08 April 2014 <br /> AGE Project No. 07-1537 <br /> Page 3 of 6 <br /> Soil-vapor samples will be analyzed by a CDPH-certified laboratory for the following <br /> constituents: <br /> • TPH-g in accordance with EPA Method TO-15; <br /> • VOC's in accordance with EPA Method TO-15; <br /> • Percent oxygen in accordance with EPA Method ASTM 1946D; and <br /> • Isopropyl alcohol in accordance with EPA Method TO-15. <br /> The proposed soil-vapor boring locations are illustrated in Figure 2. Field procedures for <br /> advancement of borings and collection of soil-vapor samples are presented in Section <br /> 3.0. <br /> 2.5. REPORT PREPARATION <br /> Upon completion of field work and receipt of final laboratory analysis, a report of <br /> findings will be prepared presenting the findings of the investigation. The report will <br /> include a description of the work performed, results of the sampling and analysis and an <br /> initial Human Health Risk Assessment (HHRA) signed by a California Professional <br /> Geologist. Conclusions, applicable recommendations, and maps will be included in the <br /> report. <br /> 3.0. FIELD PROCEDURES <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 probe borings, <br /> soil-vapor sampling, soil sampling, equipment decontamination and sample shipment <br /> are outlined below. <br /> 3.1. SOIL BORING ADVANCMENT AND SAMPLE COLLECTION <br /> Soil borings for bio-attenuation zone analysis will be advanced using a truck-mounted <br /> AMS 9600 Powerprobe or equivalent equipped with 1.25-inch diameter probing rods. <br /> Soil borings for collection of soil samples will be advanced to total depths of 10 feet bsg. <br /> Soil borings for installation of soil-vapor wells will be advanced manually using a hand <br /> auger to total depths of 5 feet bsg. The Powerprobe advances soil probe borings using <br /> a hydraulic hammer to drive soil sampling tools to specified depths. <br /> Advanced GeoEnvironmentai Inc. <br />