<p><p><strong>References:<br></strong><em>Schorr et al. (2007)</em></p><p><strong>Method Summary</strong></p><p>Vibrations produced by the jet are measured as a column is formed next to a completed column. These vibrations are analyzed, and the difference in vibrations between the native soil and the grouted soil in the neighboring column is determined. This method is still in the developmental stages but shows great potential.</p><p><strong> </strong><strong>Accuracy and Precision</strong></p><p>Wave based analysis requires additional research to ensure it is an accurate QC/QA method.</p><p><strong> </strong><strong>Adequacy of Coverage</strong></p><p>Based on the information provided by Schorr et al. (2007), wave-based analyses do not require an onerous number of tests.</p><p><strong> </strong><strong>Implementation Requirements </strong></p><p>Based on the information provided by Schorr et al. (2007), wave-based analyses do not seem difficult to perform.</p><p><strong> </strong><strong>General Comments</strong></p><p>Wave-based analysis is still in the developmental stages, but it has the potential to be applied to all types of jet grouting operations. However, it is currently a proprietary technology.</p></p>