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' 06 June 2000 <br /> AGE-NC Project No. 95-0197 <br /> Page 4 of 7 <br /> ' 3.1. PRE-FIELD WORK ACTIVITIES <br /> The health and safety plan will be updated 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 four soil probe boring using direct push technology(DPT). Two <br /> soil borings will be advanced northwest and southeast of the former UST and dispenser areas to <br /> delineate the adsorbed petroleum hydrocarbon impact on soil. Proposed probe boring locations are <br /> ' illustrated in Figure 2. <br /> The remaining two borings will be advanced east to northeast of monitoring well MW2 to assess the <br /> ' lateral extent of the dissolved MTBE plume. The proposed probe boring locations may be modified <br /> due to field observations or additional borings may be advanced with approval by the PHS-EHD. <br /> Each proposed boring will be advanced to 35 feet bsg or until the field observations and field <br /> ' screening using an organic vapor meter (OVM) indicate that detectable petroleum vapors are not <br /> present in the soil samples screened from two consecutive five-foot intervals. <br /> Soil samples will be collected at 5-foot intervals beginning at 10 feet bsg extending to the total <br /> boring depths. Field procedures for advancement of borings and collection of soil samples are <br /> presented in Section 4.1.1. <br /> Selected soil samples from each probe boring will be submitted for laboratory analysis with <br /> concurrence of the PHS-EHD. The selected soil samples will be analyzed by a State of California <br /> Department of Health Services (DHS)-certified laboratory for the following constituents: <br /> ' TPH-d and TPH-g by EPA Method 8015 Modified; <br /> Volatile aromatic compounds - benzene, toluene, ethyl-benzene and total xylenes (BTEX), <br /> and methyl tertiary butyl ether(MTBE) by EPA Method 8020; and <br /> Fuel oxygenates - di-isopropyl ether (DIPE), ethyl tertiary butyl ether (ETBE), MTBE, <br /> tertiary amyl methyl ether(TAME), and tertiary butyl alcohol (TBA) by EPA Method 8260 <br /> ' Modified. <br /> Laboratory reports for soil analyses, testing methods, laboratory quality assurance/quality control <br /> .Advanced Geo£nvironmentsl,Inc. <br />