Phase II environmental geophysics at J-Field, Aberdeen Proving Ground, Maryland

Geophysical studies were conducted at eight sites on the tip of Gunpowder Neck (J-Field) in the Edgewood Area of Aberdeen Proving Ground, Maryland. The results of the studies were used to delineate the extent of three former burning pits and help determine the necessity of further investigation at five potential areas of concern (PAOCs). Intensive investigations were performed at the three former burning pits and two of the PAOCs by using electromagnetic (EM-31 and EM-61), total field magnetometry, and ground-penetrating radar geophysical techniques. The successful integration of the four data sets characterized the extent, the approximate depth and nature of fill material, and the location of metallic debris at the three former burning pits. At the two PAOC sites that were intensively investigated, no continuous areas of metallic debris, indicating organized burials, were present. Less extensive exploratory profiles conducted at three other PAOC sites indicated the presence of buried metal objects, but they were inconclusive in defining the nature and extent of buried materials