The development and prospective use of a closed model system to facilitate study of a number of indicators of environmental impact of wood preservatives laboratory conditions has been described (IRG/WP/2395-92). Chemical analysis of leachate samples collected from drained soil profiles containing creosoted pole sections remedially treated with a chromated fluoride preservative indicated small increases in fluoride and chromium concentrations. This paper details measurement of dehydrogenase activity and chemical analysis of soil samples recovered from the surface layers of the model soil profiles adjacent to treated pole sections. Reduced levels of dehydrogenase activity were associated with increased soil concentrations of leached preservative components and lower organic matter content. Findings are discussed as part of an assessment of environmental impact of the remedial treatment in the field

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