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Fig. 5. Breakthrough curves and model prediction of Cl and C. parvum oocysts in undisturbed soil columns for Exp. III. Initial concentrations in the applied feces was 12.5 g Cl L–1 and 3.5 x 108 C. Parvum oocysts L–1. (a) 12-cm Hudson soil column, (b) 20-cm Hudson soil column, and (c) 30-cm Arkport soil column.