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22 May 2007 AGE-.NC Project No. 47-0360 Page 3 of 6 • Benzene,toluene,ethylbenzene,and total xylenes(BTEX)and fuel additives methyl tertiary- butyl ether (MTBE), di-isopropyl ether (DIPE), ethyl tertiary-butyl ether (ETBE), tertiary- amyl methyl ether (TAME), tertiary-butyl alcohol (TBA), 1,2-dibromoethane (EDB), and 1,2-dichloroethane (1,2-DCA) in accordance with EPA Method 82608. Laboratory reports for soil and ground water 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.Field procedures for advancement of probe borings and collection of soil and ground water samples are presented in Section 3.1. 2.3. SOIL-VAPOR SAMPLE COLLECTION AND ANALYSIS AGE proposes to advance six soil-vapor borings using direct push technology; the proposed soil-vapor b ring locations may be modified due to field observations. The soil vapor sample will be compaito Environmental Screening Level established by Regional Water Control Board.The soil-vapor borings will be advanced to a depth of 5 feet bsg at the edge of the site building structures and in the former UST area at the approximate locations depicted on Figure 2. The proposed soil vapor boring locations are presented below: • Three soil-vapor borings immediately north of the on-site structure; and • Three, soil-vapor borings at the center, northwest and southwest corners of the former UST area. Soil-vapor samples from each probe boring will be submitted for laboratory analysis by a State of California Department of Health Services(DHS)-certified laboratory for the following constituents: volatile organic compounds (VOCs) to include BTEX and naphthalene in accordance with EPA Method 8260 and/or TO-15. 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. Field procedures for advancement of probe borings and collection of soil samples are presented in Section 3.1. 2.4. REPORT PREPARATION Upon completion of field work and receipt of final laboratory analysis, a report will be prepared presenting the findings of the investigation. The report will include a description of the work Advanced GeoEnvironmental,Inc.