Final best demonstrated available technology (BDAT) background document for chromium wastes D007 and U032. Volume 22

The background document provides the Agency's technical support and rationale for the development of treatment standards for the constituents to be regulated for the above-mentioned chromium-containing wastes. Section 2 describes the industries affected by regulation of these wastes, explains the processes generating these wastes, and presents available waste characterization data. Section 3 specifies the applicable and demonstrated treatment technologies for these wastes. Section 4 contains performance data for the demonstrated technologies, and Section 5 contains analyses of these performance data to determine BDAT for each waste. Section 6 contains the determination of BDAT treatment standards for the regulated constituent (chromium). Section 7 discusses an associated chromium-containing U-code waste (U032 - calcium chromate) and details the development of the treatment standards for this waste.