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28 June 2007 <br />AGE-NC Project No. 06-1481 <br />Page 3 of 5 <br />The site assessment tasks are discussed below. <br />3.1. PRE-FIELD WORK TASKS <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. <br />3.2. SOIL SAMPLE COLLECTION AND ANALYSIS <br />AGE proposes to advance a total of seven borings using direct push technology in the areas of <br />concern to assess for contaminant-impacted soil beneath the site. Three borings will be advanced to <br />depth of 40 feet below surface grade (bsg) or until ground water is encountered (grab groundwater <br />and soil sampling; APNs 153-111-01, 153-040-03, 153-040-15); two borings will be advanced to <br />a depth of 20 feet bsg (APN 153-040-03); two borings will be advanced to a depth of 10 feet bsg <br />(APNs 153-040-11, 153-040-14). As the borings are advanced, soil samples will be collected at 5- <br />foot intervals beginning at 5 feet bsg and extending to the total depth of the probe boring. <br />The proposed probe boring locations are illustrated in Figure 1. Field procedures for advancement <br />of probe boring and collection of soil samples are presented in Sections 4.1 and 4.2. <br />Selected soil samples from each probe boring may be submitted for laboratory analysis. Samples <br />selected for analysis will be analyzed by a State of California Department of Health Services (DHS)- <br />certified laboratory for some or all of the following constituents: <br />Total petroleum hydrocarbons quantified as gasoline (TPH-g), diesel (diesel), hydraulic oil <br />(TPH-ho) and motor oil (TPH-mo) in accordance with EPA Method 8015M; <br />Volatile organic compounds, including benzene, toluene, ethylbenzene and xylenes (BTEX), <br />and methyl tertiary-butyl ether (MTBE) in accordance with EPA Method 8260; and <br />CAM 17 Metals in accordance with EPA Method 6010B. <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 GeoEnvironme t a I, Inc.