Fig. 4. Arsenic K-XANES (X-ray absorption near edge structure) spectra for soil samples collected for a preliminary study (Hesterberg, 2001) from sampling locations around the incinerator at the Bogue site as compared with As(III) and As(V) standards. Spectra for soil samples showed that As(V) was dominant. The energy scale is normalized to the K edge of elemental As at 11867 eV. See Fig. 3 caption for sample designations.