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25 August 2003 <br /> AGE-NC Project No. 03-1050 <br /> Page 3 of 5 <br /> The preliminary site assessment tasks are discussed below. <br /> 3.1. PRE-FIELD WORK TASKS <br /> A health and safety plan will be prepared in accordance with Occupational Safety and Health <br /> Guidance Manual for Hazardous Waste Site Activities (National Institute for Occupational Safety <br /> and Health Administration, U.S. Coast Guard and U.S. Environmental Protection Agency, 1985). <br /> Prior to mobilization, the area of excavation will be clearly marked and a utility clearance obtained <br /> through Underground Service Alert. <br /> 3.2. SOIL SAMPLE COLLECTION AND ANALYSIS <br /> AGE proposes to advance two probe borings using direct push technology in the area of the existing <br /> in-ground three-stage separator . All of the borings will be advanced to depths of 15 feet below <br /> surface grade(bsg);the proposed probe boring locations may be modified due to field observations. <br /> As each boring is advanced,soil samples will be collected at 5-foot intervals beginning at 5 feet bsg <br /> and extending to the total depth of the probe boring. <br /> The proposed probe boring locations are illustrated in Figure 2. Field procedures for advancement <br /> of probe borings and collection of soil samples are presented in Sections 4.1 and 4.2. <br /> Selected soil samples from each probe boring will be submitted for laboratory analysis.The selected <br /> soil samples will be analyzed by a State of California Department of Health Services(DHS)-certified <br /> laboratory for one or more the following constituents: <br /> • Total petroleum hydrocarbons quantified as gasoline (TPH-g) and diesel (TPH-d) in <br /> accordance with EPA Method 8015M and <br /> • Volatile organic compounds,including benzene,toluene,ethylbenzene and xylenes(BTEX), <br /> and methyl tertiary-butyl ether(MTBE) in accordance with EPA Method 8260M. <br /> Laboratory reports for soil analyses, testing methods, laboratory quality assurance/quality control <br /> (QA/QC) reports, and sample chain of custody documentation will be presented in a report with <br /> findings and recommendations. <br /> Advanced GeoEnviron mental,Inc. <br />