Noninvasive determination of the location and distribution of DNAPL using advanced seismic reflection techniques.

Recent advances in seismic reflection amplitude analysis (e.g., amplitude versus offset-AVO, bright spot mapping) technology to directly detect the presence of subsurface DNAPL (e.g., CCl4) were applied to 216-Z-9 crib, 200 West Area, DOE Hanford Site, Washington. Modeling to determine what type of anomaly might be present was performed. Model results were incorporated in the interpretation of the seismic data to determine the location of any seismic amplitude anomalies associated with the presence of high concentrations of CCl4. Seismic reflection profiles were collected and analyzed for the presence of DNAPL. Structure contour maps of the contact between the Hanford fine unit and the Plio/Pleistocene unit and between the Plio/Pleistocene unit and the caliche layer were interpreted to determine potential DNAPL flow direction. Models indicate that the contact between the Plio/Pleistocene unit and the caliche should have a positive reflection coefficient. When high concentrations of CCl4 are present, the reflection coefficient of this interface displays a noticeable positive increase in the seismic amplitude (i.e., bright spot). Amplitude data contoured on the Plio/Pleistocene-caliche boundary display high values indicating the presence of DNAPL to the north and east of the crib area. The seismic data agree well with the well control in areas of high concentrations of CCl4.

Further contrasts between self-reflectiveness and internal state awareness factors of private self-consciousness.

Although widely used as a unitary measure of self-focused attention, the Private Self-Consciousness subscale (Fenigstein, Scheier, & Buss, 1975) contains two factors. In the present study, this subscale and its self-reflectiveness (SR) factor predicted greater shame, guilt, other-directedness, and social anxiety; but the internal state awareness (ISA) factor displayed relationships that were in the opposite direction. Contrasts between SR and ISA often became more obvious in partial correlations, when one factor was examined while controlling for the other. In relationships with personal and social identity, SR appeared to reflect public as much as private self-consciousness. These data support recent suggestions that it may be necessary to construct more adequate measures of private self-consciousness.