<p><p><strong>Reference(s):</strong></p><p><em>DeJong et al. (2006)<br>Neumeier (1999)</em></p><p><strong>Method Summary</strong></p><p>A micro‑scale investigation can observe the characteristics, degree of bonding between particles, and compositional nature of cementing agents directly. SEM and X-ray compositional mapping were used to perform the analysis, as shown in Figure 1.</p><p><figure id='attachment_7146' style='max-width:388px' class='caption aligncenter'><img class="wp-image-7146 size-full" src="https://www.geoinstitute.org/sites/default/files/geotech-tools-uploads/…; alt="Elements of sub-specimens of lightly microbially cemented sand" width="388" height="305" /><figcaption class='caption-text'> Figure 1. Elements of sub-specimens of lightly microbially cemented sand (DeJong et al. 2006; With permission from ASCE).</figcaption></figure></p><p><strong>Accuracy and Precision</strong></p><p>This method provides a qualitative evaluation of the technology’s effectiveness. This method uses microscopes and other special equipment to monitor the micro-structure of treated soil. The objective of this technology is to generate calcium carbonate between soil particles, thus the monitoring of the micro-structure for soil is necessary.</p><p><strong>Adequacy of Coverage</strong></p><p>This method has low to medium adequacy of coverage. Because this method can only look at a small part of a sample, it may not accurately represent the entire site.</p><p><strong>Implementation Requirements </strong></p><p>This method requires specialized microscope equipment.</p><p><strong>General Comments</strong></p><p>SEM and X-ray compositional mapping have high accuracy for monitoring treated soils. These two methods could monitor the variation of soil particle to particle. Thus, these two tests are highly recommended for quality control and quality assurance.</p></p>