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Hal Owen & Associates, Inc.

Soil and Environmental Scientists

Soil Evaluations

Text Box: Contact us:

Hal Owen & Associates, Inc.
Post Office Box 400
Lillington, NC 27546

Phone: 910-893-8743
Fax: 910-893-3594
Email: service@halowensoil.com

Auger borings allow the Soil Scientist to examine the morphological characteristics of the soil and make determinations about use.

Soil in an auger boring
On-site Septic Investigations (perk test)

We’ve come a long way from the old “perk test” where water was poured into an open hole to see how fast it was absorbed.  Today, Soil Scientists observe soil morphology (texture, structure, clay mineralogy, organics) and other physical properties that are independent of the weather to determine the suitability of the soil to support sewage treatment and disposal systems.  Using sound science, we can determine the ability of the soil to support various system types from conventional gravel drainlines to highly engineered pretreatment systems to surface application systems.  In addition, we can provide recommendations about lot sizes based on septic demands.

Flood Hazard Soil Investigation

Activities within flood prone areas are often regulated by local or county ordinances.  While GIS and Soil Surveys can be beneficial in identifying potential flood hazard areas, on-site verification and delineation are often necessary to meet regulatory requirements.  Our Licensed Soil Scientist can identify flood hazard soils and provide a delineation (to be located by a surveyor) and a report needed to meet these requirements.

Soil Investigation
for Stormwater Management

Designing a stormwater BMP often requires knowing the specific, on site soil characteristics where the proposed device will be installed. A soil investigation by our Licensed Soil Scientist can provide the necessary data for your project, such as the depth to the seasonal high water table (SHWT) and estimated permeability of various soil layers. We can also conduct hydraulic conductivity tests which provide an in-situ measurement of water movement through the soil, as required by the NC Stormwater BMP Manual for certain stormwater treatment devices.

A soil scientist uses hand auger borings or excavated pits to observe the soil profile.  He uses information about landscape position, drainage patterns, vegetative cover, and local geology to predict changing soil patterns. Then, using an aerial photograph or a survey map with known points, he maps the dominant soil units that he observed on the investigated site.

The intensity of a soil investigation will vary depending on the amount of information you require. We will provide a report describing our findings and a map demonstrating the soil units observed. Please note that virtually no investigation, no matter how exhaustive, can identify all conditions below ground and inclusions of contrasting soil may occur within a mapped soil unit.


· low-intensity field evaluation

· usually requested by potential buyers of property as a tool to determine if the property is a good investment

· this level of investigation is not intended to be used for detailed subdivision planning


· medium-intensity field evaluation

· adequate for subdivision planning purposes


· high-intensity field evaluation

· typically provided for single lot investigations or for recording subdivision plats

· may include a delineation where a soil unit boundary is marked with flags to be survey located

Hydraulic conductivity testing equipment

An Amoozemeter is a tool used to measure the in-situ hydraulic conductivity of the soil.

Soil Scientist in pit

A pit provides an excellent view of the various soil layers occurring below surface which the scientist notes in a soil profile description.

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