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i <br /> 1 � <br /> ' Soil samples were collected from the borings at 5-foot intervals <br /> starting at a depth of approximately 12 to 15 bgs . Sort samples <br /> Were collected by driving a sampler containing vinyl acetate tubing <br /> using a power probe . A total of nineteen soil samples were <br /> collected from the three borings . <br /> ' Three grab groundwater samples were collected from the three <br /> borings using a hydropunch. Hollow diameter steel casing <br /> containing a perforated PVC screen at the bottom of the casing was <br /> advanced to approximately 3 feet below the first permeable zone. <br /> The casing was then retracted approximately 4 feet to allow the <br /> ' infiltration of groundwater. Grab groundwater samples were <br /> collected by lowering a Teflon bailer through the hollow casing <br /> The samples were transferred into 40-m1 VOA vials and amber glass <br /> bars. <br /> The filled tubes, VOA vials, and amber glass jars were immediately <br /> capped, sealed, labeled, and placed in a chilled cooler containing <br /> crushed ice for transportation to the laboratory. Proper <br /> documentation and field chain-of-custody procedures were followed <br /> The borings were backfilled with cement grout upon completion of <br /> sampling activities All equipment used during this investigation <br /> which might have come into contact with contaminated materials was <br /> ' thoroughly decontaminated before and after each use . This was <br /> accomplished by washing with Alconox (a laboratory-grade detergent) <br /> and rinsing with deionized or distilled water <br /> ' All equipment used during this investigation which might have come <br /> into contact with contaminated materials was thoroughly <br /> ' decontaminated before and after each use. This was accomplished by <br /> washing with Alconox (a laboratory-grade detergent) and rinsing <br /> with delonized or distilled water. <br /> 1 <br /> 5 . 0 LABORATORY ANALYSIS <br /> ' The soil and groundwater samples were sent to McCampbell <br /> Analytical, Inc. of Pacheco, California, a state-certified <br /> ' laboratory, and selectively analyzed for. <br /> TPHg using EPA Method 8015, <br /> TPHd and TPH as motor oil (TPHmo) using EPA Method 8015C, <br /> BTEX using EPA Method 8020, and <br /> 3 <br />