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25 October 2000 <br /> AGE-NC Project No. 00-0782 <br /> Page 3 of 6 <br /> • Report preparation. <br /> The preliminary site assessment tasks are discussed below. <br /> 3.1. PRE-FIELD WORK ACTIVITIES <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 /> Initially,AGE proposes to advance one soil probe borings using direct push technology(DPT) in the <br /> vicinity of the former UST area to determine if petroleum hydrocarbon and/or MTBE contamination <br /> is present in soil and/or ground water beneath the site. The proposed probe boring location is <br /> illustrated in Figure 2. <br /> The probe boring will be advanced to 65 feet bsg or until the field observations and field screening <br /> using an organic vapor monitor(OVM)indicate that detectable petroleum vapor is not present in the <br /> soil samples screened from two consecutive five-foot intervals. The proposed boring location may <br /> be modified due to field observations or additional borings may be advanced with approval by the <br /> PHS-EHD. <br /> Soil samples will be collected at 5-foot intervals beginning at 5 feet bsg extending to the total probe <br /> boring depth. <br /> Field procedures for advancement of the soil probe boring and collection of soil samples are <br /> presented in Sections 4.1 and 4.2. Selected soil samples from the probe and hand auger boring will <br /> be submitted for laboratory analysis with concurrence of the PHS-EHD. The selected soil samples <br /> will be analyzed by a State of California Department of Health Services (DHS)-certified laboratory <br /> for the following constituents: <br /> • TPH-d in accordance with EPA Method 8015 Modified/5030; <br /> • BTEX in accordance with EPA Method 8020; <br /> Advanced GeoEnvironmental,Inc. <br />