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♦ a 18 November 2003 AGE-NC Project No. 03-1080 Page 3 of 6 3.1. PRE-FIELD WORK TASKS A health and safety plan will be prepared in accordance with Occupational Safety and Health Guidance Manual for Hazardous Waste Site Activities (National Institute for Occupational Safety and Health Administration, U.S. Coast Guard and U.S. Environmental Protection Agency, 1985). Prior to mobilization, the area of excavation will be clearly marked and a utility clearance obtained through Underground Service Alert. 3.2. SOIL AND GRAB GROUND WATER SAMPLE COLLECTION AND ANALYSIS AGE proposes to advance three soil probe borings using direct push technology in the area of the fuel dispensers D1 and D4 to assess for petroleum hydrocarbon- and/or MTBE-impacted soil and ground water; one boring will be located approximately 5 feet north of D 1 (down-gradient), one boring will be located at the adjacent southern edge of D1, and one boring will be located at the d 'teagare of D4. Each boring will be advanced to a depth of 20 feet below surface grade(bsg)or until"first'ground water is encountered;the proposed probe boring locations may be modified due to field observations. As each 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 locations are illustrated in Figure 2. Field procedures for advancement of probe borings and collection of soil and grab ground water samples are presented in Sections 4.1 and 4.2. Selected soil and grab ground water samples from each probe boring will be submitted for laboratory analysis. 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: • TPH-g and TPH-d in accordance with EPA Method 8015M; • Benzene, toluene, ethylbenzene and xylenes (BTEX), MTBE, TBA, di-isopropyl ether (DIPE), ethyl tertiary-butyl ether (ETRE), tertiary-amyl methyl ether (TAME), 1,2- dichloroethane (1,2-DCA), ethylene dibromide (EDB), ethanol, and methanol by EPA Method 826013. Laboratory reports for soil and grab 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. Advanced GeoEnvironmental,Inc.