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Figure 14 Nuclear Density Gauge <br />Figure 15 Coring at NI location <br />The cores were then taken to the MnDOT Materials Lab. The chip seal was sliced off the <br />samples, then air voids (ASTM T269, T166 & T209) and permeability were measured using the <br />Flexible Wall Permeameter ASTM PS 129-01. <br />C-2 <br />