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18 March 2002 <br /> AGE-NC Project No. 00-0729 <br /> Page 3 of 5 <br /> The site assessment tasks are discussed below. <br /> 3.1. PRE-FIELD WORK PREPARATIONS <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.Drilling permits will be obtained from the EHD,who also will <br /> be notified at least 72 hours prior to initiation of field work to schedule grouting inspections. <br /> 3.2. DRILLING AND SOIL SAMPLE COLLECTION <br /> Initially, AGE proposes to advance four soil probe borings at the site as part of site assessment <br /> activities. AGE proposes soil probe borings in the areas of the former dispenser islands and USTs. <br /> Proposed probe boring locations are illustrated in Figure 2. <br /> The proposed soil borings will be advanced to approximately 30 feet bsg with at least one boring to <br /> ground water. Soil samples will be collected at 5-foot intervals beginning at 5 feet bsg to the total <br /> depth of each boring. Field procedures for advancement of borings and collection of soil samples <br /> are presented in Section 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 the following constituents: <br /> • Total petroleum hydrocarbons quantified as gasoline (TPH-g) by EPA Method 8015 <br /> Modified; and <br /> • Benzene, toluene, ethylbenzene and total xylenes (BTEX) and methyl tertiary butyl ether <br /> (MTBE)by EPA Method 8020. <br /> Selected samples may also be analyzed for total petroleum hydrocarbons quantified as diesel <br /> (TPH-d) and motor oil (TPH-mo). <br /> Advanced GeoEnvironmental,Inc. <br />