- Summary The purpose of this study was to investigate the feasibility of using the Sequencing Batch Reactor (SBR) as a key component in an on-site biological remediation program for the treatment of contaminated soil and leachates present at Niagara Mohawk Power Corporation's Harbor Point site in Utica, New York. Soil and leachate samples brought from this site were tested for biological activity. Plate counts and carbon evolution from soil respirometers verified significant activity of indigenous soil microorganisms. Laboratory- scale SBRs were tested by using several operating strategies. The SBRs removed most of the soil and leachate constituents while producing “specialized bacteria” resistant to cyanide. Results from Chemical Oxygen Demand (COD) measurements and gas chromatograph analyses of selected target organics showed high removal efficiencies.