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O1 February 2001 <br /> AGE-NC Project No. 00-0791 <br /> Page 2 of 4 <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) to <br /> determine if petroleum hydrocarbon-impacted soil and/or ground water is present beneath the site. <br /> Proposed probe boring locations are illustrated in Figure 2. <br /> The proposed probe boring locations maybe modified due to field observations or additional borings <br /> may be advanced with approval by PHS-EHD. Each proposed probe borings will be advanced to <br /> approximately 20 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 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. The selected soil samples will be analyzed by a State of California Department of Health <br /> Services (DHS)-certified laboratory for the following 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 /> • Volatile aromatic compounds(benzene,toluene,ethyl-benzene and total xylene:BTEX),and <br /> methyl tertiary butyl ether (MTBE)by EPA Method 8020. <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 /> Advanced GeoEnviroamen[al,Inc. <br />