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31 March 2014 <br /> AGE Project No. 14-2997 <br /> Page 4 of 5 <br /> • Benzene, toluene, ethylbenzene, and total xylenes (BTEX) and fuel additives <br /> methyl tertiary-butyl ether (MTBE), di-isopropyl ether (DIPE), ethyl tertiary-butyl <br /> ether (ETBE), tertiary-amyl methyl ether (TAME), tertiary butanol (TBA), ethylene <br /> dibromide (EDB), and 1,2-dichloroethane (1,2-DCA) in accordance with EPA <br /> Method 8260B. <br /> • Selected Metals analysis. <br /> • Field Screening for petroleum. <br /> Laboratory reports for analyses, testing methods, laboratory quality assurance/quality <br /> control (QA/QC) reports, and sample chain-of-custody documentation will be presented <br /> in a report with the findings and recommendations. <br /> 4.0. PROCEDURES <br /> All field procedures will be overseen by an AGE representative working under the <br /> supervision of a California Professional Geologist. Procedures for advancing soil probe <br /> borings, collection and analysis of soil samples, equipment decontamination and <br /> sample handling are presented below. <br /> 4.1. SOIL BORING ADVANCEMENT <br /> Soil borings will be advanced using a van-mounted Geoprobe 5400 direct-push or <br /> equivalent AMS Powerprobe 9600 probing unit equipped with 1.25-inch probing rods. <br /> The Geoprobe advances soil probe borings using a hydraulic hammer to drive soil <br /> sampling tools to specified depths. <br /> 4.2. SOIL SAMPLING <br /> Soil samples will be collected from each boring at discreet five-foot intervals beginning <br /> at five feet bsg using a 1.45 inch Geoprobe soil sampling assembly loaded with one <br /> two-foot long acetate sleeve. Soil samples will be collected to a total depth of 20 feet <br /> bsg or until field evidence signifies the absence of adsorbed petroleum hydrocarbon <br /> impact. Upon sample retrieval, a portion of the acetate sleeve will be separated and the <br /> sleeve ends will be covered with Teflon sheets, capped and sealed with tape. <br /> Appropriately sealed and labeled samples will be placed in a chilled container under ice <br /> and transported under chain-of-custody procedure to a CDPH-certified laboratory. <br /> Samples will be analyzed for the constituents listed in Section 3.3. Each sample sleeve <br /> will be labeled with boring designation, depth, time, date and sampler's initials. Soils <br /> encountered in the borings will be visually classified by AGE personnel in accordance <br /> with the Unified Soil Classification System (USCS). Additionally, soil samples will be <br /> Advanced GeoEnvironmental Inc. <br />