Excavating the Trench. 1  1. Remove the topsoil. Excavate 10â20 centimeter (3.9â7.9 in) of soil, depending on the depth of the topsoil layer. 2  2. Begin the digging. Line your workers or equipment up with the ditch line, and start to dig. 3  3. Dig your first cut to the appropriate depth.
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For example, if the average no-show rate is 30%, and the average time allotted per visit is 15 minutes, a practice could reduce that 15 minutes by 30% and allow only 10.5 minutes per appointment, resulting in more appointment slots (LaGanga and Lawrence 2007). Effects of Overbooking