HomeMy WebLinkAboutHoneycutt Hills_Final Soils report Central Carolina Soil Consulting, PLLC
1900 South Main Street, Suite 110
Wake Forest, NC 27587
919-569-6704
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July 10, 2021
May 2, 2023
Job # 3806
DRB
Attention: Kerry Buckner
3000 RDU Center Drive
Suite 202
Morrisville, NC 27560
RE: Preliminary soil/site evaluation on ~48-acres in Harnett County adjacent to James
Norris Road.
Dear Mr. Buckner:
Central Carolina Soil Consulting, PLLC conducted a detailed soil evaluation on the
parcel listed above to determine the areas of soils that are provisionally suitable for
subsurface wastewater disposal systems (conventional & LPP). The soil/site evaluation
was performed using hand auger borings during moist soil moisture conditions based
on the criteria found in the State Subsurface Rules, 15ANCAC 18A .1900 “Laws and
Rules for Sewage Treatment and Disposal Systems”. From this evaluation, CCSC
sketched the provisionally suitable soils line onto a topographic map through ground
trothing, gps soil boundary lines and GPS field location of soil borings/pits to increase
mapping accuracy.
The above referenced parcels are located east of James Norris Road. This area lies
in the upper coastal plain geologic units where soils have formed from marine
sediment. The soils that have formed on this parcel are similar to the Norfolk, Varina
and Worsham soil series. The attached soils map indicates the areas of provisionally
suitable vs. unsuitable soils. The Norfolk and Varina soil series are generally
provisionally suitable for subsurface wastewater disposal systems. That is, the
morphology of the soils contain suitable characteristics that would support subsurface
septic systems such as sandy loam to sandy clay loam textured subsoils that are not
considered expansive, blocky structure and no indicators of restrictive characteristics
within 24 inches of the soil surface. The Worsham soil series is a very poorly
drained soil in the drainage ways of the property and is unsuitable for subsurface
septic systems. Additional unsuitable areas are due to surface water setbacks and
topographic conditions.
The attached soils map indicates the areas of soils which are suitable for subsurface
wastewater systems. The “hatched soil units” on the attached map indicates the areas
of soils that have 30+ inches of suitable soil material. These areas have potential for
conventional or modified conventional septic systems. The “cross hatched units” on
the attached map indicate areas of soils with 24-29 inches of suitable soil material and
have potential for ultra-shallow conventional or LPP septic systems. Unit “UN” on the
attached map indicates areas of unsuitable soils for conventional and LPP septic
systems.
Future Subdivision Considerations
Several factors should be considered before a final subdivision plan is created for this
property. One consideration is that each proposed lot shall contain an adequate
amount of suitable soils, which can support a primary septic system along with a
repair septic system. The suitable soil areas cannot be affected by future homes,
driveways, patios, excavation or filling activities and if an on-site well is used then a
100’ setback is required around the well head for both system and repair drainfields
along with all tanks (septic & pump). An exact square footage of suitable soils
required per lot to obtain a permit cannot be given due to soil variability and
topographic characteristics on each lot. The amount of suitable soils required to
support a 4-bedroom residence will range between 8,000 ft2-11,000 ft2 (could be more
or less) per lot. These soil area estimates are based upon soil application rates for
sandy clay loam to clay textured subsoil with a range of .3 gallons per day/square
foot and 0.4 gallons per day/square foot for conventional type systems. The ultimate
application rate will be assigned by the Harnett County Health Department based on a
detailed evaluation.
Some lots will require septic system layouts due to limited soil areas, house
placements and/or possible pool locations. If any proposed lot does not meet the
minimum soil areas listed above then a septic system field layout is required
demonstrating system and repair, along with the location of a house, drive, decks, etc.
If the layout proves the lot can accommodate a system and repair on the lot with the
house and other features, then it can be recorded. The amount of drain line required
for each lot will be based upon the daily flow, soil application rate and type of system
proposed on the lot. The daily flow is assigned by the number of actual bedrooms in
a proposed home (120 gallons/day/bedroom). The field layouts do not represent a
septic permit or a guarantee of a permit on such lots. The permits are ultimately
issued by the local health department based on current subsurface wastewater
regulations.
Please note that lots 22, 27, 28 and 32 had field layouts completed in June 2022 to
verify that has sufficient area for a primary and repair 3-bedroom system and repair.
The remaining lots in Honeycutt Hills have provisionally suitable soils for a 3-
bedroom subsurface system and repair field along with a 40’ by 60’ house footprint.
Each of these lots have greater than 9-10,000 ft2 of provisionally suitable soils per
lot. Additional septic layouts may be required later based on final house location,
bedroom count, LTAR, etc.
During the road construction process of a subdivision or site development of a single
lot it is important not to impact any suitable soil areas with such activities as
excavating or filling. Only the actual roadways and required drainage ditches and/or
sediment basins should be constructed during this process. If the contractor requires a
staging area to place fill from the construction process, then areas of unsuitable soils
on the property should be utilized as long as they are not state/county buffers,
jurisdiction wetlands or other areas protected by local zoning regulations. If this is
not possible, then the disturbed areas should be minimized as much as possible. The
same precautions should be taken when the individual lots are cleared for home sites.
Only the vegetation should be removed in the areas of the proposed drain fields on
lots to prevent any disturbance of the naturally occurring soil. A lot with adequate
areas of suitable soils can be deemed unsuitable due to poor planning or site
disturbance. Central Carolina Soil Consulting recommends that all lot clearing activities
are delayed until a permit is issued by the local health department, with the exception
of clearing thick vegetation to access the lot.
This report discusses the location of suitable soils for subsurface wastewater disposal
systems and does not guarantee any permits or approval required by the local health
department. Central Carolina Soil Consulting, PLLC is a professional consulting firm
specializing in soil delineations and design for on-site wastewater disposal systems.
The rules governing on-site wastewater disposal systems are complex and the
interpretation of the rules are based upon the opinions of regulators (state and county
level). Due to the subjective nature of the permitting process and the variability of
naturally occurring soils, CCSC cannot guarantee that areas delineated as suitable for
on-site wastewater disposal systems will be permitted by the governing agencies.
These permitting considerations should be taken into account before a financial
commitment is made on a tract of land.
If you have any questions regarding the findings on the attached map or in this
report, please feel free contact me at anytime. Thank you allowing Central Carolina
Soil Consulting to perform this site evaluation for you.
Sincerely,
Jason Hall
NC Licensed Soil Scientist #1248
Encl: Soil Map
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