<p><p><strong>References:<br></strong><em>Dumas and Beaton (1992)</em><em>Elias et al. (2006a)</em><em>Han (1998)</em><em>Lukas (1986)</em><em>Lukas (1995) </em><em>Mackiewicz and Camp (2007)</em><em>Mitchell (1981b)</em><em>Schaefer et al. (1997)</em></p><p><strong>Method Summary</strong></p><p>Cone penetration tests should be performed both before and after compaction to estimate relative changes in soil properties.

<p><p><strong>Reference(s):</strong></p><p><em>Dumas and Beaton (1992)</em><em>Elias et al. (2006a)</em><em>Lukas (1986) </em><em>Lukas (1995)</em><em>Mitchell (1981b)</em><em>Schaefer et al. (1997)</em></p><p><strong>Method Summary<br></strong>Measurements of the crater depth and the ground heave around the crater should be done after each series of tamper drops. Greater than expected crater depths can signal areas that need additional densification.