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lam/ �Ib� i� 12 August 2003 AGE-NC Project No. 03-1035 Page 4 of 7 Each sample was collected utilizing a 1.125-inch Geoprobe soil sampling assembly loaded with four six-inch brass sleeves.After collection,the ends of the second brass sleeve were covered with Teflon sheets, capped and sealed with tape. The sleeve was labeled with soil probe boring location,depth, time,date and sampler's initials and then placed in a chilled container.Afterwards,the soil from one of the three remaining sleeves was field-screened for the presence of volatile organic compounds using an organic vapor meter equipped with a photo ionization detector (PID; Thermo Environmental 580B, 10.0 eV, calibrated to isobutylene). The collected samples were transported under chain-of-custody to Cal Tech Environmental Laboratories(CTEL), a California Department of Health Services-certified laboratory, for analysis for: • Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA Method 8015M; and • Volatile Organic Compounds, including benzene, toluene, ethyl benzene and xylenes (BTE&X), and the fuel additives tertiary butanol (TBA), di-isopropyl ether (DIPE), ethyl tert-butyl ether(ETBE),tert-amyl methyl ether(TAME),methyl tertiary-butyl ether(MTBE), 1,2-dichloroethane (1,2-DCA), and 1,2-dibromoethane (EDB) in accordance with EPA Method 826013;and r. - • Organic and total lead by EPA Methods DHS organic lead and 6010, respectively. 4.3. GRAB GROUND WATER SAMPLE COLLECTION AND ANALYSIS A grab ground water sample was collected from probe boring B-3 using a temporary PVC screen. The probe rods were advanced to a depth approximately four feet below the inferred water table (approximately 50 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 sample was collected to fill three 40-m1 EPA-approved VOA vials containing 0.5 ml 18%hydrochloric acid as apreservative. The ground water sample containers were labeled with probe boring designation, date, time, and samplers initials and then placed in a chilled container. The container was subsequently transported to CTEL for analysis for the same constituents listed in Section 3.2 above. .r Advanced GeoEnvironmental,Inc. rr - .