ERC Geophysical Investigation Summary, Building 221U, 200 West Area

摘要

This report summarizes the geophysical investigation and survey of the 221- U Plant, southern side of building. The effective depth of investigation was 0 to 14 ft throughout most of the survey area. The overall data quality was very good. Numerous pipelines and utilities were detected. Some correlated with available drawings while others could not be related to a drawing. Table 1 summarizes each GPR linear that was detected. Throughout the northern half of the site, scattered subsurface anomalies and anomalous zones (high concentration of anomalies) were detected. Most range in depth from 1 to 6 ft and have the characteristics of anthropogenic features. Due to the proximity of the site to the 221-U Building, it is anticipated that the majority of the anomalies are construction debris, possibly related to the construction of the plant. However, there is no direct evidence of their true origin. A buried tank is believed to be located in the vicinity of N570/E150. Available drawings show that it is roughly 25 ft below grade. Although the tank was not detected with GPR, the approximate location of the tank was estimated from circumstantial evidence (i.e., surface features, subsurface pipe locations). Final interpretation maps were made for the site. The depths to each linear, anomaly, and anomalous zone are shown on the interpretation maps.