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At least 2 soil excavations must be performed on the site, at opposite ends of the proposed disposal space. Locations of soil boring or dug pits must be shown on the site drawing. For subsurface disposal, soil evaluations should be performed to a depth of at least two feet below the proposed disposal field excavation depth. For surface disposal, the surface horizon must be evaluated. Describe each soil horizon and identify any restrictive features on this type. Indicate depths where options appear.

How to read a Soil Boring Report: The soil investigation report is a very important piece of knowledge. It describes the soil kind, soil group, depth to bedrock, depth to seasonal wetness, in addition as the depth, color, and texture of the different soil layers. The soil investigator can perform 5 or six soil boring within the proposed septic drainfield area. The soil cluster, depth to bedrock, and depth to seasonal wetness are the foremost necessary factors in determining if a traditional drainfield will be installed. Modifications to the conventional drainfield embrace a field with shallow trenches or raised trenches. Where a standard drainfield cannot be installed, a sandfilter is needed. The soil boring report is valid as long because the land described in the report has not been changed by cutting away the soil or by adding fill soil. The report only describes the top 5 feet of soil.