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27 December 1999 <br /> AGE-NC Project No. 99-0683 <br /> Page 3 of 6 <br /> seasonably variable. <br /> 3.0. SCOPE OF WORK <br /> Based on the results of the UST removal soil sampling, an unauthorized release of petroleum <br /> hydrocarbon compounds from the diesel USTs appears to have occurred at the site. AGE proposes <br /> to collect soil samples to evaluate the lateral and vertical extent of petroleum hydrocarbon impaction. <br /> Since ground water depth is estimated to be in excess of 50 feet bsg, we do not anticipate <br /> encountering ground water during this investigation. However, if encountered, in-situ ground water <br /> samples will be collected. The preliminary site assessment will consist of the following tasks: <br /> • Permitting and pre-field work activities; <br /> • Soil sample collection and analysis; <br /> • Ground water sample collection and analysis (if necessary); and <br /> • Report preparation. <br /> Each of these tasks is described in greater detail below. <br /> 3.1. PRE-FIELD WORK ACTIVITIES <br /> A health and safety plan wIII be prepared in accordance with Occupational Safety a�1d Health <br /> Guidance Munual 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 one soil probe boring using direct push technology(DPT). The <br /> soil boring will be advanced in the vicinity of the eastern boundary of the former UST area to <br /> evaluate the vertical extent of the petroleum hydrocarbon impact on soil and ground water. If <br /> significant hydrocarbon-impacted soil is encountered,two additional probe borings will be advanced <br /> in the vicinity of the northern and southern boundaries of the former UST area to evaluate the lateral <br /> extent of the petroleum hydrocarbon-impacted soil. Proposed probe boring locations are illustrated <br /> in Figure 2. <br /> Advanced GeoF,nvironmental,Inc. <br />