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0 <br /> 25 November 2013 <br /> AGE-NC Project No. 13-2675 <br /> Page 2 of 5 <br /> grade (bsg) for soil sample collection and depths of 38 feet bsg for groundwater sample <br /> collection. Soil boring locations are illustrated in Figure 1 . <br /> Soil borings 131 through B3 were advanced to total depths utilizing a van-mounted, <br /> GeoProbe 5400 direct-push probing unit equipped with 1 .25-inch diameter probing rods. <br /> The direct-push probing unit advances soil borings using a hydraulic hammer to drive <br /> sampling tools to specified depths. <br /> SOIL SAMPLE COLLECTION <br /> Soil samples were collected at discreet five-foot intervals, beginning at 5 feet bsg and <br /> extending to 30 feet bsg in borings 131 through B3 using a 1.45-inch diameter Geoprobe <br /> soil sampling assembly loaded with one two-foot long acetate sleeve. After sample <br /> collection, a portion of the acetate sleeve was separated and the ends were covered with <br /> Teflon sheets, capped and sealed with tape. Sample sleeves were labeled with soil boring <br /> location, depth, time, date and sampler's initials and then placed in a chilled container. <br /> Soil sample duplicates were extruded into plastic bags and field-screened for the presence <br /> of organic vapors using an organic vapor meter (OVM), equipped with a photo-ionization <br /> detector (PID). Additionally, the soil was visually classified in accordance with the Unified <br /> Soil Classification System (USCS). <br /> GRAB GROUNDWATER SAMPLING <br /> Grab groundwater samples were collected from borings 131 through 133 between 34 feet <br /> and 38 feet bsg utilizing a Geoprobe Screen Point 15 Groundwater Sampler TM (GWS). <br /> Each groundwater sample was extracted using inertial action by lowering single-use <br /> disposable '/4-inch Teflon tubing with a sampling check-valve through the hollow center of <br /> the push rods into the GWS. Sufficient sample was collected to fill three or four 40-ml <br /> EPA-approved volatile organic analysis (VOA) vials without preservative. Groundwater <br /> sample containers were labeled with soil boring designation, date, time, and samplers <br /> initials and then placed in a chilled container. <br /> SAMPLE ANALYSIS <br /> Soil and groundwater samples were transported under chain-of-custody to Cal Tech <br /> Environmental Laboratories (CTEL), a California Department of Public Health (CDPH)- <br /> Certified laboratory. Groundwater samples collected from 131 through B3 and soil samples <br /> Advanced GeoEnvironmental,Inc. <br />