SITE INFORMATION AND CORRESPONDENCE

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19 January 2012 AGE-NC Project No. 11-2006 Page 2 of 7 ends of a separated, 6-inch portion of the acetate liner were covered with Teflon sheets, capped and sealed with tape. The cut portion of the liner was labeled with soil boring location, depth, time, date and sampler's initials and then placed in a chilled container. Soil samples were transported under chain-of-custody to Cal Tech Environmental Laboratories (CTEL), a California Department of Public Health-Certified laboratory and analyzed for the following chemical constituents: • Total petroleum hydrocarbons (TPH-all) in accordance with EPA-method 8015- modified; • Volatile organic compounds (VOCs) in accordance with EPA method 826013; • Semi-volatile organic compound (SVOC's) in accordance with EPA method 8270; and • California Assessment Metals (CAM) 17 by EPA method 6010B and 7471. The remaining portion of each sample was extruded into a plastic bag and field-screened for the presence of organic vapors using an organic vapor meter (OVM), equipped with a photo-ionization detector(PID). Additionally, the soil was visually classified in accordance with the Unified Soil Classification System (USCS). PID readings and soil classifications were recorded on boring logs, which have been included in Appendix B. In addition to the soil samples collected from borings B7 and B8, selected samples collected from borings B1, B2 and B6 on 10 November 2011 were also analyzed for CAM 17 metals. GRAB GROUND WATER SAMPLE COLLECTION Grab ground water samples were collected from borings 137 and B8 at a depth of approximately 30 feet bsg. Ground water samples were collected by placing 1-inch PVC pipe equipped with a 4-foot section of temporary screen down the advanced borehole to a depth of 30 feet bsg. Each ground water sample was extracted using inertial action by lowering Teflon tubing through the hollow center of the PVC pipe. A sufficient sample was collected to fill three 40-ml EPA-approved volatile organic analysis (VOA) vials and one 1-liter amber bottle, each without preservative. The ground water sample containers were labeled with soil boring designation, date, time, and samplers initials and then placed in a chilled container. Grab ground water samples were transported under chain-of-custody to CTEL and analyzed for the following chemical constituents: • TPH-all in accordance with EPA-method 8015-modified; Advanced CcoEnvironmrntal,Inc.