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

How to read a Soil Boring Report: The soil investigation report is a vital piece of information. It describes the soil kind, soil group, depth to bedrock, depth to seasonal wetness, likewise because the depth, color, and texture of the different soil layers. The soil investigator can perform five or six soil boring within the proposed septic drainfield space. The soil group, depth to bedrock, and depth to seasonal wetness are the foremost vital factors in determining if a traditional drainfield will be installed. Modifications to the conventional drainfield include a field with shallow trenches or raised trenches. Where a traditional drainfield can't be installed, a sandfilter is required. The soil boring report is valid as long because the land described within the report has not been modified by cutting away the soil or by adding fill soil. The report only describes the top 5 feet of soil.