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05 November 2007 <br />AGE-NC Project No. 06-1481 <br />Page 3 of 7 <br />of potential chemicals of concern. <br />TPH-g-range hydrocarbons were detected in grab ground water sample B6-W at a concentration of <br />120 micrograms/liter (41) utilizing EPA Method 8015M. The volatile organic compounds <br />trichloroethene (TCE) and tetrachloroethene (PCE) were detected in sample B6-W utilizing EPA <br />Method 8260 at concentrations of 5.2 µg/1 and 110 ig/1, respectively. <br />CTEL confirmed that the TPH-g-range hydrocarbons were probably due to the presence of solvents, <br />and not TPH-g. Since the total concentration of PCE and TCE in sample B6-W was close to that of <br />the TPH-g-range hydrocarbons, AGE concludes that the "TPH-g" detected by method 8015M was <br />actually the TCE and PCE detected by method 8260. <br />No other COC were detected in the analyzed soil or grab ground water samples. <br />3.0. SCOPE OF WORK <br />AGE proposes to advance a series of soil borings in order to collect soil vapor or grab ground water <br />and/or soil samples. The phase II site assessment will include the following tasks: <br />Permitting and pre-field work activities; <br />Soil vapor or grab ground water and/or soil sample collection and analysis: <br />Report preparation <br />The site assessment tasks are discussed below. <br />3.1. PRE-FIELD WORK TASKS <br />A health and safety plan is presently on-file and was prepared in accordance with Occupational <br />Safety and Health Guidance Manual for Hazardous Waste Site Activities (National Institute for <br />Occupational Safety and Health Administration, U.S. Coast Guard and U.S. Environmental <br />Protection Agency, 1985). Prior to mobilization, the area of the soil borings will be clearly marked <br />and a utility clearance obtained through Underground Service Alert. <br />3.2. SOIL SAMPLE COLLECTION AND ANALYSIS <br />AGE will advance borings for the collection samples to collect chemical data, in order to evaluate <br />Advanced GeoEnvironmental, Inc.