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05 November 2010 <br /> AGE-NC Project No. 96-0254 <br /> Page 4 of 6 <br /> diameter, 6-inch long stainless steel sleeves. Upon removal from the sampler, sample <br /> sleeves will be separated, exposed ends of a selected sleeve will be covered with Teflon <br /> sheets, capped and sealed with tape. <br /> Soil encountered in the borings will be visually classified by an AGE geologist or <br /> environmental specialist in accordance with the Unified Soil Classification System (USCS). <br /> Additionally,selected soil samples will be field-screened forthe presence of volatile organic <br /> compounds using an organic vapor meter(OVM) equipped with a photo-ionization device <br /> (PID). Soil sample descriptions and OVM readings will be recorded on a log for selected <br /> borings. Following sample collection, each preserved sample sleeve will be labeled with <br /> the boring location, depth, time, date and sampler's initials. Appropriately sealed and <br /> labeled samples will be placed in a chilled container with ice and transported under chain- <br /> of-custody procedure to a California Department of Public Health (CDPH)-certified <br /> laboratory. Selected soil samples may be analyzed for the following constituents: <br /> • TPH-g in accordance with EPA Method 8015 Modified; and <br /> • Benzene, toluene, ethylbenzene and total xylene (BTEX compounds) and methyl <br /> tertiary butyl ether (MTBE) in accordance with EPA Method 8260; and <br /> • 1,2-dichloroethane (1,2-DCA) by EPA Method 8260 Modified. <br /> Laboratory reports for soil analysis, testing methods, laboratory quality assurance/quality <br /> control (QA/QC) reports, and sample chain of custody documentation will be presented in <br /> a report with findings and recommendations. <br /> 3.2. WELL COMPLETION <br /> Ten soil borings will be advanced for the installation of ozone injection points. Following <br /> advancement of the soil boring, one manufacturer-assembled 2-inch by 24-inch <br /> microporous injection point and casing will be installed in each boring. The injection points <br /> will be installed to depths of approximately 20 feet bsg. A 1-inch PVC riser will connect the <br /> injection points to piping and the network of tubing from the surface to the ozone generator. <br /> A proposed ozone injection well construction diagram is depicted in Figure 3. <br /> The injection diffuser points will be installed to depths of approximately 20 feet bsg in the <br /> water bearing zone. The well materials will be placed into the borehole through the interior <br /> of the hollow-stem augers.After installing the injection point and casing,filter pack material <br /> consisting of pre-washed #2/16 sand will be added from the bottom of the borehole to <br /> approximately three feet above the injection point. <br /> Advanced Geo Environmental,Inc. <br />