[en] The DC-16 borehole cluster consists of three boreholes (DC-16A, -16B, and -16C). The purpose of the cluster is to evaluate the areal characterization of hydrologic parameters and to determine the homogeneity of the test horizons underlying the Reference Repository Location. Hydrologic tests that will be conducted include: step-drawdown, high-stress long-duration constant discharge pumping, vertical permeability, tracer, and slug injection/withdrawal tests. This test specification contains details for hydrologic testing of the DC-16 borehole cluster. It includes borehole specifications, description of tests, and a schedule for testing activities. 13 refs., 8 figs., 3 tabs