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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Allow plenty of time for your application/registration to be processed. You cannot schedule your examination until you receive your Notice To Schedule (NTS). You must schedule your appointment at least five days in advance, but it is recommended to schedule your examination 45 days in advance.