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\ GIR, <br /> Southwest, Inc. <br /> pumped into the borings using a tremie hose. The top of the borehole will be sealed to match the <br /> surrounding surface. <br /> 5.5 Soil Sampling and Analysis <br /> Direct push technology will be used to collect soil samples at depths of 3 feet bgs for borings B 1 <br /> and B2, and at 6 feet for the remaining borings. The outer barrel for advancing the direct push <br /> soil borings will be approximately 2 inches in diameter, and the inner barrel will be <br /> approximately 1.75 inches in diameter. The dual-wall system minimizes sloughing, maintains <br /> boring alignment and minimizes vertical migration of contaminated soils or fluids. A closed <br /> barrel sampler will be advanced to the sampling depth, and the piston unlocked. The sampler, <br /> containing clean sample sleeves, will be driven to force soil into the sampler, and then the <br /> sampler will be removed and the sample sleeves extracted. Soil samples will be immediately <br /> sealed with Teflon®film and polyethylene caps. <br /> The soil samples will be labeled with all pertinent sampling information and packed on ice for <br /> subsequent delivery to a California state-certified laboratory for analyses. The soil in the <br /> remaining tubes will be screened for hydrocarbon vapors with a portable organic vapor analyzer <br /> (OVA), and described and logged by the field geologist in accordance with the Unified Soil <br /> Classification System (USCS). Sampling equipment will be decontaminated between sampling <br /> episodes using a triple rinse method consisting of a wash with Alconox® (or equivalent) <br /> solution, an initial rinse with tap water, and a final rinse with deionized water. Samples will be <br /> transported to a State of California certified laboratory under appropriate chain-of-custody <br /> documentation. <br /> The soil samples will be submitted under chain of custody protocol to a California-certified <br /> laboratory and analyzed on a 48-hour turnaround. All samples collected will be analyzed for <br /> total petroleum hydrocarbons as diesel (TPHd) (Method 8015), semivolatile organics (SVOCs) <br /> (Method 827013), volatile organics plus oxygenates (VOCs) (Method 8260B), nitrate (method <br /> 300.1) and ammonia as nitrogen (Method 350.1). Samples B2, B4 and B6 will also be analyzed <br /> for Arochlor polychlorinated biphenyls (PCBs) (Method 8082A). <br /> 773. PRI.02 Page 5 September 4, 2007 <br />