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Analyte concentrations In aqueous leachates from polyethylene tanks filled with five different solid wastes were compared with those In extracts from five laboratory batch procedures. Solid wastes used In the study included: electroplating sludge, electric arc furnace dust, paint Incinerator ash, mine tailings, and municipal refuse incinerator ash. Batch extraction procedures used to extract the solid wastes Included: Monofilled Waste Extraction Procedure (MWEP), U.S. EPA Extraction Procedure (EP), Ham Procedure C (HAM-C), Acetate Buffer Extraction Procedure (ABEP), and Saturated Paste Procedure (PASTE). Analyte concentrations in leachate from the large columns were reproducible and characteristic of each solid waste. In most Instances, analytes In column leachate reached a peak concentration at a liquld-to-solid ratio of 1:1 followed by a gradual to rapid decrease with continued leaching. Analyte concentrations found In large column leachate were related qualitatively to those found In extracts from the batch procedures which used delonlzed water as the extraction medium (i.e., MWEP, HAM-C, and PASTE). Batch extraction procedures using leaching medium containing acetic acid (I.e., EP) or sodium acetate buffer (I.e., ABEP) generally did not reflect analyte concentrations In leachate from the large columns. These results suggest that batch extraction procedures using acetic acid or acetate buffer are less effective for assessing the teachability of monofilled wastes than extraction methods using delonlzed water as the extraction fluid. Implications Large columns of five different solid wastes were leached with deionized water. Analyte concentrations found in large column leachates were related qualitatively to those found in extracts from the batch procedures which used deionized water as the extraction medium (MWEP, HAM-C, and PASTE). Batch extraction procedures using leaching medium containing acetic acid (EP) or sodium acetate (ABEP) generally did not reflect analyte concentrations in the leachates from the large columns. The results from this study suggest that batch extraction procedures using acetic acid or sodium acetate buffer are less effective for assessing the leachability of monofilled wastes than extraction methods using deionized water as the extraction medium.

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