<p><p><strong>Reference(s):</strong></p><p><em>Baker (1983)<br>Brachman et al. (2003)<br>Karol (2003)<br>Parish et al. (1983)<br>Waller et al. (1983)</em></p><p><strong>Method Summary</strong></p><p>Excavation or boring to the grout zone is an effective means of determining performance of the grout treatment for QA. In situ testing to determine performance properties such as bearing capacity and modulus can be conducted. Undisturbed samples can be removed and tested in the laboratory. This method can be time consuming and disruptive to the treated area. High test frequency is needed to make this method highly effective. Soil conditions around the grout zone such as sand layers can make this method not possible. With limited observations, assumptions of grout performance and location in other areas must be assumed.</p><p><strong>Accuracy and Precision</strong></p><p>Accuracy and precision depends on the type of measurements performed on samples obtained from excavation/borehole.</p><p><strong>Adequacy of Coverage</strong></p><p>Due to the high frequency of excavations needed to determine grout zone geometry this method is not optimal.</p><p><strong>Implementation Requirements</strong></p><p>The method is relatively easy to implement, but disrupts the area.</p><p><strong>General Comments</strong></p><p>While this method has some logistical limitations the information gained for performance evaluation is very useful and it should be considered as a part of any QA program. Locations for excavations or bore hole inspection must be strategically selected such that disruption of the area can be minimized.</p></p>