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12 November 2010 AGE-NC Project No. 907-1587 Page 2 of 7 2.1 . MONITORING WELL INSTALLATION, DEVELOPMENT AND SURVEY A total of five ground water monitoring wells (MW-1A, MW-1B, MW-213, MW-3B and MW-4B) were installed between 29-30 July and 06 August 2010 and developed on 14 August 2010. 2.1.1. Drilling and Sampling The five soil pilot borings for monitoring wells, were advanced using a CME-75 (HT) drill rig, equipped with 8.25-inch diameter hollow-stem augers. Pilot borings MW1A was advanced to a depth of 40 feet and pilot MW 1 to MW4B were advanced to a depth of 60 feet bsg. The drill rig and two-man crew were supplied by All Well Abandonment of Placerville, CA under licence number 848359. The permit (No. 60606) for the drilling was issued by the EHD on 27 July 2010. Soil auger returns generated by drilling were containerized in properly 55-gallon drums and disposed of at Chemical Waste Management of Kettleman City, California. Discrete soil samples were collected at 5-foot intervals during drilling to the total depth of soil borings, beginning at 5 feet bsg in soil pilot borings MW-3B and MW-4B. Soil samples were collected utilizing a California split-spoon sampler loaded with 2-inch by 6-inch brass sleeves. The sampler was driven by dropping a 140-pound weight from a height of 30 inches. The number of blows required to advance the sampler over each 6-inch increment of the 18-inch sampling interval was recorded on a boring log (Appendix B)by an AGE staff person. Soil samples were preserved by covering both ends of the second brass sleeve with Teflon sheets, capping and sealing with tape. Each preserved sample sleeve was labeled with soil boring designation, depth, time, date and sampler's initials. Each sample sleeve was properly labeled, placed in a chilled container under ice and subsequently transported under chain-of-custody procedure to Cal Tech Environmental Laboratory (CTEL), a California Department of Public Health (CDPH)-certified laboratory. Selected soil samples were analyzed based on field observation and data deficiencies for the following constituents: • Total petroleum hydrocarbons quantified as gasoline(TPH-g)and as diesel (TPH-d) in accordance with EPA Method 8015M and • Benzene, toluene, ethylbenzene and total xylenes (BTEX)and the fuel additives di- isopropyl ether (DIPE), ethyl tertiary-butyl ether (ETBE), methyl tertiary-butyl ether (MTBE), tertiary-amyl methyl ether (TAME), tertiary-butyl alcohol (TBA), Advanced GeoEnvironmental,Inc.