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Mr. Reginald Gillespie <br /> L2757-92 <br /> August 3, 1992 <br /> Page 4 <br /> A site in Greensboro was surveyed in an attempt to find fractures that could be <br /> pumped for ground water remediation. The electromagnetic survey detected a series <br /> of fractures striking N35° to 50°E. An extraction well was installed that produces <br /> 150 gpm. <br /> Geophysics as a Tool in Landfill Siting Studies <br /> Overall, it is felt that the geophysical methods described above can be a successful <br /> screening tool as part of a landfill siting study. The non-invasive approach, low cost <br /> ($4,000 to$8,000 per site), and ease of implementation can be very useful to screen a <br /> number of prospective sites to a more manageable number for more `detailed <br /> evaluations. This approach has been used by Aquaterra in the past to produce more <br /> cost-effective results instead of using soil boring programs at every site. Even though <br /> these geophysical methods do not eliminate the need for more detailed study (i.e., <br /> invasive investigation) on a prospective site to support a sanitary landfill application, <br /> they can be used to minimize the number of sites or even to target a specific site for <br /> detailed and invasive studies. <br /> If you require additional information, please contact us at (919) 859-9987. <br /> Sincerely, <br /> AQUATERRA, INC. <br /> Y10,-2‘ <br /> Phillip L. Rahn, P.G. <br /> President <br /> PLR/suz <br /> AQLATERRA <br />