with facilities in the states of Illinoisand Idaho, is owned by the United States government, andoperated by the University of Chicago underthe provisionsof a contractwith the Department of Energy. This technicalmemo is a productof Argonne'sEnergy Systems (ES) Division. For informationon the division'sscientificand engineering activities,contact: Director, Energy Systems Division Argonne National Laboratory Argonne, Illinois60439-4815 Telephone (708) 972-3724 Presented in thistechnical memo are preliminaryresultsof ongoingwork or work that is more limited in scope and depth than that described in formal reportsissuedby the ES Division. Disclaimer This report was prepared as an accountof work sponsored by an agency of the United States Government. Neither the United States Govemment nor any agency thereof, nor any of their employees, makes any warranty, expressor implied,.orassumes any legal liabilityor responsibilityfor the accuracy,completeness, or usefulness of any information,apparatus, product,or processdisclosed, or representsthat its use would not infringe privatelyowned rights. Reference t_ereinto any specificcommercial product,process, or service by trade name, trademark, manufacturer, or otherwise,does not necessarilyconstituteor imply its endorsement, recommendation,or favoring by the United States Governmentor any agency thereof. The views and opinionsof authorsexpressed herein do not necessarily state or reflect those of the United States Government or any agency thereof.

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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

Acombined terrestrial and marine seismic investigation has been undertaken of the Inner Mersey Estuary, Halton District, UK, prior to construction of a major new river crossing. Much of the site lies on inter-tidal sand and mud bars accessible only for restricted periods and is unsuited to prolonged physical investigations using heavy plant. The investigation included high-resolution seismic refraction and reflection surveying on the salt marsh and inter-tidal regions, plus sub-bottom profiler investigation of the main river channel. Strategically located boreholes followed the geophysical work. Results show that the current configuration of the Inner Mersey Estuary is largely unrelated to the underlying bedrock geometry. In the area surveyed, the River Mersey is located on the southern flank of a buried elongate depression in the bedrock surface whose approximate position has been investigated previously between Ditton Marsh and Warrington through the interpretation of borehole records. The results also demonstrate a clear increase in compressional ( P ) wave seismic velocity of the Triassic sandstone with age, allowing the possible detection of an important fault. This paper highlights the potential for saving project capital through a properly designed geophysical site investigation prior to the commencement of major civil engineering projects.

Presented in this technical memo are preliminary results of ongoing work or work that is more limited in scope and depth than that described in formal reports issued by the ES Division.