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' 06 October 2005 . AGE-NC Project No 01-0827 ' Page 3 of 7 ' of 35 feet bsg in boring B 18, soil samples were collected using a Geoprobe soil sampling assembly loaded with four pre-cleaned 1 125-inch by 6-inch brass sleeves ' After sample preservation, soil was extruded from the remaining sleeves and field-screened for the presence of volatile organic compounds using an organic vapor meter(OVM)equipped with a photo- ionization detector(PID Thermo Environmental 580, 10 0 eV,calibrated to isobutylene) The soil ' was also described in accordance with the Unified Soil Classification System Soil boring logs exhibiting soil profiles are depicted in Appendix B ' Soil samples were preserved by covering both ends of the leading, soil-filled brass sleeve with Teflon sheets,capping,and sealing with tape Each sample sleeve was labeled with soil probe boring location, depth, time, date and sampler's initials ' A grab ground water sample was collected from probe boring B18 using a temporary PVC screen The probe rods were advanced to a depth approximately four feet below the inferred water table ' (approximately 3 5 feet bsg) The hollow-steel rod assembly was pulled up approximately 4 feet,and a screened casing was inserted into the saturated zone Ground water was allowed to enter the casing, and samples were retrieved using a modified PVC tubing bailer Sufficient water was collected to ' M fill three 40-m1 EPA-approved volatile organic analysis (VOA) vials containing 0 5 ml 18% hydrochloric acid as a preservative and a one-liter amber bottle The ground water sample containers ' were labeled with probe boring designation, date, time, and samplers initials and then placed in a chilled container ' All of the samples were logged on a chain of custody form, placed in a chilled container and transported to a California Department of Health Services(DHS)-certified laboratory to be analyzed for I • Total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and TPH-d) in accordance with EPA Method 8015M, and • Benzene, toluene, ethylbenzene, and total xylenes (BTEX), and the fuel oxygenated compounds tertiary butanol (TBA), di-isopropyl ether (DIPE), ethyl tertiary-butyl ether I (ETBE), tertiary-amyl methyl ether (TAME), methyl tertiary-butyl ether (MTBE), 1,2-dichloroethane (1,2-DCA), and 1,2-dibromoethane (EDB) by EPA Method 8260 I222 Equipment Decontamination and Boring Completion Prior to sample collection, soil sampling equipment was thoroughly rinsed with clean water after • washing with a solution of Alconox Geoprobe rods were thoroughly cleaned prior to soil probe Advanced GeoEnvironmenlai,Inc I