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02 August 2000 <br /> AGE-NC Project No. 00-0728 <br /> Page 3 of 6 <br /> • In-situ ground water sample collection and analysis; <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 an utility clearance obtained <br /> through Underground Service Alert. <br /> 3.2. SOIL SAMPLE COLLECTION AND ANALYSIS <br /> Initially, AGE proposes to advance four soil probe borings using direct push technology(DPT) in <br /> the vicinity of the former UST area to determine if petroleum hydrocarbon-impacted soil and/or <br /> ground water is present beneath the site. Proposed probe boring locations are illustrated in Figure <br /> 2. <br /> The proposed probe boring locations may be modified due to field observations or additional borings <br /> may be advanced with approval by the PHS-EHD. Each proposed probe borings will be advanced <br /> to 35 feet bsg or until the field observations and field screening using an organic vapor monitor <br /> (OVM)indicate that detectable petroleum vapors are not present in the soil samples screened from <br /> two consecutive five-foot intervals. <br /> Soil samples will be collected at 5-foot intervals beginning at 5 feet bsg extending to the total probe <br /> boring depths. <br /> Field procedures for advancement of probe borings and collection of soil samples are presented in <br /> Sections 4.1 and 4.2. Selected soil samples from each probe boring will be submitted for laboratory <br /> analysis with concurrence of the PHS-EHD. The selected soil samples will be analyzed by a State <br /> of California Department of Health Services (DHS)-certified laboratory for the following <br /> constituents: <br /> • Total petroleum hydrocarbons as gasoline (TPH-g), and total petroleum hydrocarbons as <br /> diesel (TPH-d)by EPA Method 8015 Modified/3550; <br /> Advanced GeoEnvironmental,Inc. <br />