<p><p><strong>References:<br></strong><em>Bo and Choa (2004)</em></p><p><strong>Method Summary</strong></p><p>When drain materials are delivered to the site, a thorough inspection should be performed to verify quality and adherence to design specification. Material inspection ensures that the highest quality materials are being used on-site. Laboratory tests are the usual method to check the discharge capacity, tensile strength, AOS, and permeability of the drains. The consistency of drain quality should be monitored and controlled based on laboratory test.</p><p><strong> </strong><strong>Accuracy and Precision</strong></p><p>Thorough inspection is an accurate method for determining the quality of construction materials.</p><p><strong> </strong><strong>Adequacy of Coverage</strong></p><p>Test samples are selected randomly but should be taken frequently enough to provide representative results.</p><p><strong>Implementation Requirements </strong></p><p>Implementation will require laboratory testing conducted by trained personnel.</p><p><strong> </strong><strong>General Comments </strong></p><p>Drain dimensions are standardized at 100 mm wide and 4 mm thick. A reduction of drain thickness will lead to a reduction of discharge capacity of the drain, which can affect the performance of the drain. Drains are generally delivered in rolls 200 to 300 meters in length.</p></p>