This report is one of a series on environmental geophysical studies around the perimeters of buildings in the Canal Creek area of the Edgewood area of Aberdeen Proving Ground. The series was initiated in 1991 at BuildingE5032, where geophysical techniques were evaluated and a design for the surveys was established. Studies continued in 1992, when surveys of Buildings E5190, E5282, E5375, E5440, E5476, E5481, E5974, and the Building E103 dump were completed. In 1993, the Argonne National Laboratory geophysics team conducted environmental surveys at Beach Point and J-Field. Buildings E5485, E5487, E5489 (i.e., the "Ghost Town Complex") were surveyed between 1992 and 1994 by using improved instrumentation and a new time-domain electromagnetic instrument designed to detect nonferrous buried metals and to eliminate interference from metals resting on the surface or contained in aboveground structures. Environmental geophysical surveys at the complex were completed during the winter of 1994 by means of the new magnetometer and EM equipment, as well as a bistatic ground-penetrating radar. Equipment used at the latter buildings was also used at Building E3640. Field surveys for Building E3640, described here, were completed between

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