Dense nonaqueous phase liquid tracer tests: Experimental results

Two dense nonaqueous phase liquid (DNAPL) tracer tests were carried out in a shallow aquifer north of Fort Worth, TX. i-Propanol was used as the nonpa rtitioning tracer; n-hexanol and n-octanol were the partitioning tracers. F ield data, mathematical modeling, the results of column tests, and field tr acer tests with NaCl were used in designing the DNAPL tracer tests. The res ults indicated the presence of DNAPL at both sites tested; semi-quantitativ e estimates of the amounts of DNAPL present were obtained by mathematical m odeling. Interpretation was complicated by heterogeneity of the aquifer and mass transport effects.