<p><p><strong>References:<br></strong><em>White et al. (2007a)</em></p><p><strong>Method Summary</strong></p><p>Undisturbed samples of the compacted soil can be used for laboratory strength and modulus testing. Soil sampling from on-site stockpiles can be helpful to conduct classification, compaction, strength, and modulus testing. It must be noted that strength and modulus testing conducted on laboratory compacted samples may result in different properties than field samples due to differences in soil structure. Also, different laboratory compaction methods (i.e., impact, static, vibratory, gyratory, or kneading) may result in different properties (White et al. 2007a). The following table provides a list of tests that can be performed on soil samples and its use for QC/QA.</p><p><table class='tablepress' id='tablepress-2000'><thead><th><center>Test</th><th><center>Type of Sample*</th><th><center>QC or QA</th><th><center>Correlation to CCC</th></thead><tbody><tr><td ><center>Atterberg limits</td><td > <center><img src="http://geotechtools.geoinstitute.org/app/uploads/2018/03/check-mark.png…; alt="" width="22" height="16" class="alignnone size-full wp-image-479" />■</center> </td><td >QC/QA</td><td >No**</td></tr><tr><td ><center>Water content</td><td > <center><img src="http://geotechtools.geoinstitute.org/app/uploads/2018/03/check-mark.png…; alt="" width="22" height="16" class="alignnone size-full wp-image-479" />■</center> </td><td >QC/QA</td><td >Yes</td></tr><tr><td ><center>Particle size distribution</td><td > <center><img src="http://geotechtools.geoinstitute.org/app/uploads/2018/03/check-mark.png…; alt="" width="22" height="16" class="alignnone size-full wp-image-479" />■</center> </td><td >QC/QA</td><td >No**</td></tr><tr><td ><center>Proctor</td><td ><center>■</td><td >QC/QA</td><td >Yes***</td></tr><tr><td ><center>Density</td><td > <center><img src="http://geotechtools.geoinstitute.org/app/uploads/2018/03/check-mark.png…; alt="" width="22" height="16" class="alignnone size-full wp-image-479" /></center> </td><td >QC/QA</td><td >Yes</td></tr><tr><td ><center>Organic content</td><td > <center><img src="http://geotechtools.geoinstitute.org/app/uploads/2018/03/check-mark.png…; alt="" width="22" height="16" class="alignnone size-full wp-image-479" />■</center> </td><td >QC</td><td >No**</td></tr><tr><td ><center>Consolidation</td><td > <center><img src="http://geotechtools.geoinstitute.org/app/uploads/2018/03/check-mark.png…; alt="" width="22" height="16" class="alignnone size-full wp-image-479" />■</center> </td><td >QA</td><td >No</td></tr><tr><td ><center>Permeability</td><td > <center><img src="http://geotechtools.geoinstitute.org/app/uploads/2018/03/check-mark.png…; alt="" width="22" height="16" class="alignnone size-full wp-image-479" />■</center> </td><td >QA</td><td >No</td></tr><tr><td ><center>Shear strength</td><td > <center><img src="http://geotechtools.geoinstitute.org/app/uploads/2018/03/check-mark.png…; alt="" width="22" height="16" class="alignnone size-full wp-image-479" />■</center> </td><td >QA</td><td >Yes</td></tr><tr><td ><center>Resilient modulus</td><td > <center><img src="http://geotechtools.geoinstitute.org/app/uploads/2018/03/check-mark.png…; alt="" width="22" height="16" class="alignnone size-full wp-image-479" />■</center> </td><td >QA</td><td >Yes</td></tr><tr><td ><center>R-value</td><td ><center>■</td><td >QA</td><td >Yes</td></tr><tr><td ><center>California Bearing Ratio</td><td ><center>■</td><td >QA</td><td >Yes</td></tr><tr><td ><center>Freeze/thaw susceptibility </td><td > <center><img src="http://geotechtools.geoinstitute.org/app/uploads/2018/03/check-mark.png…; alt="" width="22" height="16" class="alignnone size-full wp-image-479" />■</center> </td><td >QA</td><td >No</td></tr></tbody></table><br><p class="disclaimer">√ “Undisturbed” Shelby tube Sample; ■ Disturbed Sample (from stock pile)</p><p class="disclaimer"> “undisturbed” samples cannot be obtained for granular materials</p><p class="disclaimer">**results can be used to differentiate material type</p><p class="disclaimer">***can be used to determine percent compaction from field tests</p><strong>Accuracy and Precision</strong></p><p>Accuracy and precision of the test depends on the test method. Most of these test methods are widely used in geotechnical engineering practice and have been standardized by ASTM and AASHTO. <strong> </strong></p><p><strong> </strong><strong>Adequacy of Coverage</strong></p><p>These tests represent soil properties of the sample obtained only. Experience is required to interpret soil layering information from multiple soil borings and samples.</p><p><strong> </strong><strong>Implementation Requirements </strong></p><p>A drill rig will be needed if undisturbed samples are to be obtained from greater depths. Disturbed samples from shallow depths can be obtained using hammer-driven Shelby tubes or test pit excavation.</p><p><strong> </strong><strong>General Comments</strong></p><p>Obtaining samples enables visual inspection of the material and provides material for conducting a variety of tests as described above. The applicability of each measurement type for QC/QA are summarized in the table above.</p></p>