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<br /> <br />Figure 4: Comparison of Target and Measured H 2 O 2 Dose <br /> <br />Figure 5 plots the measured influent and effluent 1,4-dioxane concentrations. 1,4-dioxane was injected <br />at a rate that should provide a relatively constant concentration for all 11 runs. The average influent <br />1,4-dioxane concentration was 183.5 μg/L and varied from 169 to 197 μg/L. Effluent concentrations <br />varied widely, as expected based on the varied operating conditions of the tests, and ranged from 187 <br />μg/L for Run 1 to below the analytical method detection limit of 0.07 μg/L for Run 5. <br /> <br /> 12