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09 March 2005 AGE-NC Project No. 05-1263 Page 3 of 4 on Figure 2; the proposed probe boring locations may be modified due to field observations. 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 each probe boring will be submitted for laboratory analysis.The selected 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; and • Volatile organic compounds,including benzene,toluene,ethylbenzene and xylenes(BTEX), and methyl-tertiary-butyl ether (MTBE) in accordance with EPA Method 8260B. 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. 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 performed and results of the sampling and analysis. Conclusions,applicable recommendations,and maps will be included in the report. 4.0. FIELD PROCEDURES All field procedures will be overseen by an AGE representative under the supervision of a California Professional Geologist. Procedures for the advancement of borings, soil sampling, equipment decontamination and sample shipment are outlined below. 4.1. PROBE BORING ADVANCEMENT Probe borings will be advanced using a van-mounted Geoprobe 5400 direct-push probing unit equipped with 1.25-inch probing rods. The Geoprobe advances soil probe borings using a hydraulic hammer to drive soil sampling tools to specified depths. Advanced GeoEnvironmental,Inc.