About Triangle Soil Consulting, PLLC

A preliminary evaluation, sometimes referred to as the “Site & Soil Evaluation” or “Perc Test,” is done as part of the due diligence process where the level of detail for an Improvement Permit is not desired. A preliminary is often done to determine

if there are usable soils on property before purchasing.

Soil characteristics, observed through conducting hand auger borings, along with site characteristics are used to determine the suitability of a particular area. Based on data collected in the field, a soil report and soil map is created. 

The Licensed Soil Scientist a2 Improvement Permit is a "hybrid" septic permitting option that allows Triangle Soil Consulting to complete a site & soil evaluation for a property and provide all documentation in accordance to NCGS 130A-335 (a2) for issuance of an Improvement Permit to the local health department for review. The local health department has 5 business days to conduct a completeness review of the documentation. This permit option is in lieu of the evaluations normally conducted by the local health department for issuance of the Improvement Permit and allows for a reduced turnaround time for permitting. 

A septic system layout is a field representation of septic drainlines and can be used by Local and State regulatory agencies to verify the area proposed for the septic system. A laser level is used to layout the drainfield on contour and the drainlines are marked in the field using colored pin flags.

Depending on soil and site conditions a septic system design may be required prior to obtaining a permit from the local health department. Triangle Soil Consulting is familiar with the most up to date wastewater treatment technologies and approvals. Our team can assist you in designing the most appropriate and economical system to meet your specific needs.

Soil mapping is used to evaluate the suitability of the soil and site features for permitting of subsurface wastewater treatment systems (septic systems) for larger tracts of land. Soil characteristics, observed through conducting hand auger borings, along with site characteristics are used to determine the suitability of a particular area. Based on data collected in the field, a soil report and soil map is created. 

This information can be used as a tool for preliminary site planning, determining development potential, or subdivision recordation. Based on the client's needs and budget, “detailed” or “preliminary” mapping options are available. Our staff will be happy to provide consultation on which option might be best for your specific project.  

Saturated hydraulic conductivity testing is used to provide an in-situ measurement of water movement through the soil for subsurface wastewater treatment system (septic system) permitting and as required by the NCDEQ Stormwater Design Manual for certain stormwater control measures (SCMs).   

A stormwater control measure (SCM) soil evaluation utilizes hand auger borings to determine the soil characteristics and seasonal high water table conditions in an area proposed to be used for a SCM. Information collected is used to help  design engineers choose the best SCM based on site conditions and ensure design meets the criteria set forth in the NCDEQ Stormwater Design Manual. 

Wetlands are natural resources protected by State and Federal Law. Using the criteria set forth in Federal guidelines a delineation of the wetland boundary can be performed. Hydric soils, wetland hydrology and hydrophytic vegetation are indicators used to delineate wetlands. A wetland delineation report and map is generated for confirmation with Federal, State and Local regulatory agencies. Once this documentation is confirmed by the applicable regulatory agencies, they can be used for preliminary site planning purposes.

Surface waters, such as streams and ponds, are also protected natural resources and are delineated along with wetlands on a project site. Depending on the watershed a project is located in, buffer assessments for streams and other surface waters are performed based on the Surface Water Identification & Training Certification (SWITC) methodology set by NCDEQ. Triangle Soil Consulting holds the SWITC certification.

Field data is collected with a submeter EOS Arrow 100 GPS unit. 

Maps provided to our clients are created using ESRI Collector, ArcGIS Pro and/or AutoCAD.