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20 September 2004 <br />AGE-NC Project No 97-0311 <br />Page 2 of 6 <br />2.2. LOGGING <br />Soil was extruded from a second brass sleeve and screened for the presence of organic vapor and <br />the soil was then visually described in accordance with the Unified Soil Classification System (see <br />Appendix B). <br />2.3. WELL COMPLETIONS <br />Pilot borings MW-1 through MW-4 were completed as ground water monitoring wells using <br />two-inch diameter PVC casing with 0.020-inch slotted screen installed from approximately 45 feet <br />to 65 feet bsg in borings MW-1 and MW-4, and approximately 44 feet to 64 feet bsg in borings <br />MW-2 and MW-3, with blank casing extended to the surface. <br />The filter pack (No. 3 Lonestar sand) was installed from approximately 44 feet to 65 feet bsg in <br />MW-1 and MW-4 and approximately 43 feet to 65 feet bsg in MW-2 and MW-3. A nominal 2-foot <br />bentonite chip plug was then installed above the filter pack and hydrated. The wells were then <br />grouted to near the surface with portland cement and water-tight, traffic-rated well boxes were <br />installed over the wells. As-built well diagrams are depicted on the boring logs in Appendix B. <br />2.4. LABORATORY ANALYSIS OF SOIL SAMPLES <br />Selected soil samples were analyzed for: <br />Total petroleum hydrocarbons quantified as gasoline, diesel, stoddard and oil (TPH-g, d, ss <br />and o) in accordance with EPA Method 8015 Modified; <br />Volatile organic compounds (VOCs) and fuel additives in accordance with EPA Method <br />8260 Modified; and <br />California Assessment Metals (CAM17) in accordance with EPA Methods 6010 and 7471. <br />2.5. MONITORING WELL DEVELOPMENT AND SAMPLING <br />On 18 August 2004, depth to ground water was measured in wells MW-1 through MW-4 from the <br />top of the well casings to the nearest 0.01-foot utilizing a Slope water level meter; ground water <br />elevations and gradients in this report are based on the measured depths. <br />Advanced GmEnvironmental, Inc.