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,.. , 11 June-2004 AGE-NC'Project No. 95-0106 54 ' ,Page,,2 of 6 Discrete soil samples were collected froin.the remaining borings at 5-foot intervals, beginning at 5' ' feet bsg, using a Geoprobe push-driven 2-inch diameter soil sampler fitted with four six-inch long brass sleeves. 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 location;depth,time,date and sampler's initials and was stored in the chilled container under ice: ' The remaining soil samples retrieved from the borings were visually classified on a.boring log by an AGE geologist,in accordance with the Unified Soil Classification System(USCS);the soil boring log is provided in Appendix B. Additionally, the soil samples were field-screened fo'r the presence ' ' of*volatile. or ahic compounds,using an organic vapor meter (OVM) equipped ed with a photo- i6hizatioii-detec'tor (PID: Thermo Environmental 580A; 10.0'eV, calibrated to isobutylene); the concentration,readings were recorded on the boring'log. ' 2.3.. GROUNDWATER SAMPLE COLLECTION _ ,With'the exception.of probe boring B21,which'was advance my to'l0 feet bsg,grab,ground water samples were collected at water-table depth(approximately. Meet bsg)and at the total depth of each probe boring utilizing a Geoprobe water sampling,assembly fitted with a pre-cleaned one-inch diameter 0.01=incli slotted temporary well screen: The ground water sample, was extracted by ' lowering a-Teflon hose equipped with a ball-valve through the hollow center.of the push rods into .the screen'se.ction. The sample was collected in.three EPA-approved 40-m1 VOA vials containing 0.5 ml 18% hydrochloric acid as a sample preservative. The collected-ground water samples were ' ,labeled."with'the boring designation, date, time, 'and sampler's initials and placed in a chilled { container under ice. 2.4.' LABORATORY ANALYSIS OF-SOIL AND GRAB GROUND WATER SAMPLES ' The soil and grab groundwater samples were transported under chain-of-custody procedures to Cal Tech'E-nvironmental`.�Laboratories, a,Califoniia'•Department of Health.Services.(DHS)-certified. laboratory; the grab ground water samples and selected soil samples were analyzed for: ' Total -petroleum hydrocarbons quantified.as gasoline(TPH-g) in.accordance With,EPA Method 8015 Modified; and ` • Benzene, toluene, ethyibenzene and xylenes:(BTEX); an the`fuel additives MTBE, di- isopropyl' ether (DIPE), ethyl tertiary�butyl ether (ETBE), :tertiary-amyl methyl ether. ' (TAME), tertiary butanol (TBA);" ethylene dibromide, (EDB) and 1,2-diehloroethane (1,2-DCA) in accordance with,EPA Method 8260B: ' Advanced GeoEnviron mental,Inc.