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i 17 June 2003 AGE-NC Project No. 03-1035 Page 4 of 6 water.As the boring is advanced,soil samples will be collected-at 5-foot intervals beginning at 5 feet bsg and extending to the total depth of the probe boring. The proposed probe boring location is illustrated in Figure 2. Field procedures for advancement of probe borings and collection of soil samples are presented in Sections 4.1 and 4.2. Selected soil samples from the probe boring will be submitted for laboratory analysis.The selected soil samples will be analyzed by a State of California Department of Health Services(DHS)-certified laboratory for one or more the following constituents: • Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA Method 8015M; • Volatile organic compounds,including benzene,toluene,ethylbenzene and xylenes(BTEX), 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 • Organic and total lead by EPA Methods DHS organic lead and 6010, respectively. Laboratory reports for soil analyses, testing methods, laboratory quality assurance/quality control (QA/QC) reports, and sample chain of custody documentation will be presented in a report with ' findings and recommendations. 3.3. GRAB GROUND WATER SAMPLE COLLECTION AND ANALYSIS Grab ground water samples will be collected from each boring during the boring process using a Geoprobe water sampling assembly. Samples will be collected into 40-m1 volatile organic analysis (VOA) vials with 0.5 ml 18% hydrochloric acid as a sample preservative and 500-m1 plastic containers as appropriate for the required analyses; ground water sample collection procedures are presented in Section 4.1. Ground water samples will be analyzed by a DHS-certified laboratory for: • TPH-g by EPA Method 8015 Modified; • VOCs by EPA Method 8260 and Advanced GeoEnvironmental,Inc.