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a 15 November 2011 AGE-NC Project No. 11-1999 Page 2 of 5 below surface grade (bsg); borings B7, 1311, and B12 were advanced to depths of approximately 16 feet bsg; and boring B10 was advanced to a depth of approximately 18 feet bsg. Soil borings were advanced utilizing a truck-mounted, PowerProbe 9600 direct-push probing unit equipped with 1.25-inch diameter probing rods. The PowerProbe advances soil probe borings using a hydraulic hammer to drive sampling tools to specified depths. 2.1. SOIL SAMPLE COLLECTION Soil samples were collected at discreet five-foot intervals beginning at 5 feet bsg in borings 131 through B12 using a 1.25-inch diameter Geoprobe soil sampling assembly loaded with four six-inch stainless steel sleeves. After collection, the ends of a selected stainless sleeve were covered with Teflon sheets, capped and sealed with tape. Sample sleeves were labeled with soil boring location, depth, time, date and sampler's initials and then placed in a chilled container. Soil sample duplicates were extruded into plastic bags 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, provided in Appendix A. 2.2. GRAB GROUND WATER SAMPLE COLLECTION Grab ground water samples were collected from each boring, with the exception of B10, at depths between approximately 16 and 21 feet bsg utilizing a Geoprobe Screen Point 15 Ground Water Sampler TM (GWS). Each ground water sample was extracted using inertial action by lowering Teflon tubing through the hollow center of the push rods into the GWS. 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. Ground water sample containers were labeled with soil boring designation, date, time, and samplers initials and then placed in a chilled container. 2.3. SAMPLE ANALYSIS Soil and grab ground water samples were transported under chain-of-custody to Cal Tech Environmental Laboratories (CTEL), a California Department of Public Health (CDPH)- Certified laboratory and selected samples were analyzed for the following chemical constituents: Advanced CeoEnvironmental,Inc.