Conceptual Site Development — The first phase of the investigation process is perhaps the most important. It is at this point that the property owner (or buyer) and a member of our design team meet and discuss the overall development objectives (i.e. the size and location of the dwelling, the location of the garage, pool, driveway and well (if appropriate). In addition, the number of bedrooms in the dwelling should be decided at this time. Septic systems are designed based upon the number of bedrooms—having this information going into the field investigation is helpful to ensure that an adequate area is located for the system.
Soil Profile Analysis —The second step in the investigation process is the soil profile analysis. This test requires the use of a backhoe to excavate test pits. County staff and a member of our design team carefully assess the various soil horizons encountered in the test holes to determine soil texture, soil structure, apparent permeability and depth to seasonal or permanent groundwater.
The soil profile analysis is definitely the most significant aspect of this entire testing process. The proper interpretation of the soil characteristics (color, texture, mineralization, etc.) requires years of specialized experience in the local area.
Determination — With the soil profile analysis successfully completed, a determination may be made as to the type of septic system required. If the site is suitable for a standard system, the county may develop a design and ready an installation permit for issuance. If however, the site requires an engineered system, then the project must proceed with the system design.
