ABSTRACT
This chapter presents data on the levels of a cocontaminant, 1,2,4,5,7,8-hexachloroxan-thene (HCX), identified in the still bottoms waste and in the soil at Times Beach, Missouri. The model, using the simplified material and energy balance equations, has been used to predict the soil tetrachlorodibenzo-p-dioxin (TCDD) profiles measured at Eglin Air Force Base in Florida. An unwanted by-product, 2,3,7,8-TCDD, was produced. Finding a chemical with a structure similar to TCDD in the same soil as TCDD, such as HCX, should concern anyone doing toxicological studies on the soil. The variability of chemical loading in the tested soil column cores was significant. The levels present in the original soil were then determined by dividing the weight of the soil into the amount of 2,3,7,8-TCDD or 1,2,4,5,7,8-HCX found. The concentration of TCDD was found to increase to a maximum at a depth of approximately 8 cm and then declined at deeper depths.
