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04 February 2000 <br /> AGE-NC Project No. 95-0167 <br /> i <br /> Page 2 of 8 <br /> 0 <br /> Each of these tasks is described in greater detail 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 /> 1 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 /> I <br /> 3 .2. SOIL SAMPLE COLLECTION AND ANALYSIS <br /> AGE proposes to advance two soil probe borings using direct push technology (DPT) in the vicinity <br />' of the former dispenser area and south of the former dispenser area to evaluate the lateral and vertical <br /> extent of the petroleum hydrocarbon impacts to soil and ground water. Proposed probe boring <br /> I locations are illustrated in Figure 2. <br /> The proposed probe boring locations many be modified due to field observations or additional <br /> borings may be advanced with approval by the PHS-EHD. Two proposed probe borings will to be <br /> advanced to 40 feet bsg or until the field observations and field screening using an organic vapor . <br /> monitor (OVM) indicate that detectable petroleum vapors are not present in the soil samples <br /> screened from two consecutive five-foot intervals. <br /> Soil samples will be collected at 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 /> Section 4. 1 . 1 . Selected soil samples from each probe boring will be submitted for laboratory analysis <br /> with concurrence of the PHS-EHD. The selected soil samples will be analyzed by a State of <br /> California Department of Health Services (DHS)-certified laboratory for the following constituents : <br /> • TPH-g by EPA Method 8015 Modified; <br /> • BTEX by EPA Method 8020; and <br /> • Fuel oxygenates including MTBE, TBA, DIPE, ETBE and TAME by EPA Method 8260. <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 />