report of geotechnical exploration oak ridge main...
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GEOServices, LLC; 2561 Willow Point Way; Knoxville, Tennessee 37931; Phone: (865) 539-8242; Fax: (865) 539-8252
September 22, 2017
Realty Link, LLC
550 South Main Street
Greenville, South Carolina 29601
ATTENTION: Mr. Chris Swale
Subject: REPORT OF GEOTECHNICAL EXPLORATION
Oak Ridge Main Street – Outparcel L
Oak Ridge, Tennessee
GEOServices Project No. 21-17664
Dear Mr. Swale:
We are submitting the results of the geotechnical exploration performed for the subject project. The
geotechnical exploration was performed in accordance with our Proposal No. 11-17340R1, dated
September 6, 2017, and as authorized by you. The following report presents our findings and
recommendations for the proposed construction. Should you have any questions regarding this
report, or if we can be of any further assistance, please contact us at your convenience.
Sincerely,
GEOServices, LLC
T. Brian Williamson, P.E. Matthew B. Haston, P.E.
Project Manager Senior Geotechnical Engineer
TN 118,861 TN 109,269
TBW/MBH:tbw
REPORT OF
GEOTECHNICAL
EXPLORATION
Oak Ridge Main Street –
Outparcel L
OAK RIDGE, TENNESSEE
GEOSERVICES, LLC
PROJECT NO. 21-17664
Submitted to: Realty Link, LLC
550 South Main Street
Greenville, South Carolina 29601
ATTENTION: Mr. Chris Swale
Submitted by:
GEOServices, LLC
2561 Willow Point Way
Knoxville, Tennessee 37931
Phone (865) 539-8242 Fax (865) 539-8252
TABLE OF CONTENTS
Contents Page
1.0 INTRODUCTION...................................................................................................................1
1.1 PURPOSE .....................................................................................................................1
1.2 PROJECT INFORMATION AND SITE DESCRIPTION ...........................................1
1.3 SCOPE OF STUDY ......................................................................................................1
2.0 EXPLORATION AND TESTING PROGRAMS ................................................................2
2.1 FIELD EXPLORATION ...............................................................................................2
2.2 LABORATORY TEST PROGRAM ............................................................................3
3.0 SUBSURFACE CONDITIONS .............................................................................................3
3.1 GEOLOGIC CONDITIONS .........................................................................................3
3.2 SOIL STRATIGRAPHY ..............................................................................................4
4.0 CONCLUSIONS AND RECOMMENDATIONS .................................................................6
4.1 SITE ASSESSMENT ....................................................................................................6
4.2 SITE PREPARATION RECOMMENDATIONS ........................................................8
4.2.1 Subgrade ........................................................................................................8
4.2.2 Structural Soil Fill .........................................................................................8
4.2.3 Dense Graded Aggregate ...............................................................................9
4.3 FOUNDATION RECOMMENDATIONS ...................................................................9
4.3.1 Shallow Foundations .....................................................................................9
4.3.2 Slabs-on-Grade ............................................................................................10
4.3.3 Settlement .....................................................................................................10
4.4 SEISMIC DESIGN CRITERIA ..................................................................................11
4.5 PAVEMENT DESIGN RECOMMENDATIONS ......................................................11
4.5.1 Flexible Pavement Design ...........................................................................11
4.5.2 Rigid Pavement Design ................................................................................12
4.5.3 General ........................................................................................................13
5.0 CONSTRUCTION CONSIDERATIONS ..........................................................................13
5.1 FOUNDATION CONSTRUCTION ...........................................................................13
5.2 EXCAVATIONS ........................................................................................................14
5.2.1 Excavation Safety ..........................................................................................14
5.3 HIGH PLASTICITY SOIL CONSIDERATIONS ......................................................14
5.4 MOISTURE SENSITIVE SOILS ...............................................................................16
5.5 DRAINAGE AND SURFACE WATER CONCERNS..............................................16
5.6 SINKHOLE RISK REDUCTION AND CORRECTIVE ACTIONS .........................17
6.0 LIMITATIONS .....................................................................................................................18
APPENDICES
APPENDIX A – Figures and Test Boring Records
APPENDIX B – Soil Laboratory Data
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1.0 INTRODUCTION
1.1 PURPOSE
The purpose of this geotechnical exploration was to explore the subsurface conditions of the
proposed project sit and provide general recommendations for general site grading and for design
and construction of the foundation system, including allowable bearing pressure. In addition,
recommendations for light duty and heavy duty asphalt and concrete pavements are also provided.
1.2 PROJECT INFORMATION AND SITE DESCRIPTION
Project information was provided by Mr. Chris Swale, which included a site plan for the
proposed project. The project site is located directly northeast of the intersection of South Tulane
Avenue and South Illinois Avenue in Oak Ridge, Tennessee. Although, detailed construction
information is unavailable at this time, we understand that the proposed project is to consist of
the construction of a new single-story retail building and associated pavements. Structural
loading information has not been provided; however, we understand the foundations for the
proposed structure have been designed with a maximum allowable bearing capacity of 1,500 psf.
The site currently exists as a vacant property and ground cover general consists of short grass.
The site has been filled with soil associated with the Oak Ridge Main Street Development.
Detailed grading information has not been provided. However, we anticipate earthwork cuts and
fill of up to 5 feet may be necessary to accommodate the proposed construction.
1.3 SCOPE OF STUDY
The geotechnical explorations involved a site reconnaissance, field drilling, laboratory testing,
and engineering analysis. The following sections of this report present discussions of the field
exploration, laboratory testing programs, site conditions, and conclusions and recommendations.
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The geotechnical scope of services did not include an environmental assessment for determining
the presence or absence of wetlands, or hazardous or toxic materials in the soil, bedrock, surface
water, groundwater, or air, on, or below, or around this site. Any statements in this report or on
the boring logs regarding odors, colors, and unusual or suspicious items or conditions are strictly
for informational purposes.
2.0 EXPLORATION AND TESTING PROGRAMS
2.1 FIELD EXPLORATION
The existing subsurface conditions were explored with eight (8) soil test borings. Five (5) borings
were performed in the footprint of the proposed building and the remaining three (3) borings were
performed in the proposed parking and drive areas. The locations and depths were selected and
staked in the field by GEOServices personnel using the provided site plan and a handheld GPS unit.
Drilling was performed on September 13, 2017. The borings were advanced using 2.25-inch inside
diameter hollow stem augers (HSA) with a Geoprobe® tracked mounted drill rig. The approximate
locations of the test borings performed on site are referenced in Figure 2. Detailed logs for soil test
borings can be found in Appendix A of this report.
Within each boring, SPT and split-spoon sampling were performed at approximately 2.5-foot
intervals in the upper 10 feet and 5 feet intervals thereafter. The drill crew worked in accordance
with ASTM D 6151 (hollow stem auger drilling). Standard Penetration Tests and split-spoon
sampling were performed in accordance with ASTM D 1586.
In split–spoon sampling, a standard 2-inch O.D. split-spoon sampler is driven into the bottom of
the boring with a 140-pound hammer falling a distance of 30 inches. The number of blows
required to advance the sampler the last 12 inches of the standard 18 inches of total penetration is
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recorded as the Standard Penetration Resistance (N-value). These N-values are indicated on the
boring logs at the testing depth, and provide an indication of strength of cohesive materials.
2.2 LABORATORY TEST PROGRAM
After completion of the field drilling and sampling phase of this project, the soil samples were
returned to our laboratory where they were visually classified in general accordance with the
Unified Soil Classification System (USCS – ASTM D 2487) by a GEOServices geotechnical
professional. Select samples were then tested for moisture content (ASTM D 2216) and Atterberg
limits (ASTM D 4318). The laboratory test results are further discussed in the following sections of
this report and a summary is provided in Appendix B.
3.0 SUBSURFACE CONDITIONS
3.1 GEOLOGIC CONDITIONS
The site lies within the Appalachian Valley and Ridge Physiographic Province of East
Tennessee. This Province is characterized by elongated, northeasterly-trending ridges formed on
highly resistant sandstone and shale. Between ridges, broad valleys and rolling hills are formed
primarily on less resistant limestone, dolomite, and shale.
Published geologic information indicates that the proposed construction area is underlain by
limestones of the Chickamauga Group. The Chickamauga Group is comprised mostly of
limestone with minor amounts of shale. Weathering of the Chickamauga Group generally
produces a medium to high plasticity clay soil with minor amounts of chert gravel.
Since the underlying bedrock formation contains limestone, the site is susceptible to the typical
carbonate hazards of irregular weathering, cave and cavern conditions, and overburden sinkholes.
Carbonate rock, while appearing very hard and resistant, is soluble in slightly acidic water. This
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characteristic, plus differential weathering of the bedrock mass, is responsible for the hazards. Of
these hazards, the occurrence of sinkholes is potentially the most damaging. In East Tennessee,
sinkholes occur primarily due to differential weathering of the bedrock and “flushing” or
“raveling” of overburden soils into the cavities in the bedrock. The loss of solids creates a cavity
or “dome” in the overburden. Growth of the dome over time or excavation over the dome can
create a condition in which rapid, local subsidence or collapse of the roof of the dome occurs.
While a rigorous effort to assess the potential for sinkhole formation was beyond the scope of
this evaluation, our borings did not encounter obvious indications of sinkhole development at the
locations explored. A certain degree of risk with respect to sinkhole formation and subsidence
should be considered with any site located within geologic areas underlain by potentially soluble
rock units. A review of the United States Geologic Survey (USGS Windrock, TN) topographic
and geologic quadrangle maps of the area did reveal one closed contour depression, which
indicate past sinkhole activity within the general vicinity of the site. We consider that this site has
a low to moderate potential for future sinkhole development.
Based on this information, it is our opinion that the risk of sinkhole development at this site is no
greater than at other sites located within similar geologic settings which have been developed
successfully. However, the owner must be willing to accept a slight to moderate risk of sinkhole
development at this site. The risk of sinkhole development can be reduced by following the
recommendations provided in the Sinkhole Risk Reduction and Corrective Actions section of this
report.
3.2 SOIL STRATIGRAPHY
The following subsurface description is of a generalized nature to highlight the subsurface
stratification features and material characteristics at the boring locations. The boring logs
included in Appendix A of this report should be reviewed for specific information at each boring
location. Information on actual subsurface conditions exists only at the specific boring locations
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and is relevant only to the time that this exploration was performed. Variations may occur and
should be expected at the site.
Fill Soils
Existing fill soil was encountered in each of the eight borings from the ground surface to depths
ranging from 8 to 11 feet beneath the existing ground surface. We note that the existing fill was
not penetrated in boring B-8, prior to termination at 10 feet. Fill is classified as soils that have
been transported and placed by man. The fill soils generally consisted of reddish brown and
brown fat clay (CH) with varying amounts of rock fragments. The SPT N-values used to evaluate
the consistency of the fill soil encountered ranged from 4 to 16 blows per foot (bpf), indicating a
consistency of soft to very stiff. However, the N-values indicating very stiff soils were likely
elevated due to rock fragments.
The natural moisture content of the fill soil samples tested ranged from approximately 12.7 to
33.8 percent. Moreover, the fill soils were typically judged to be “moist” to “wet” during visual
classification. Additionally, the Atterberg limits testing resulted a liquid limits (LL) and plasticity
index of 64 and 42 percent, respectively.
Residual Soil
Beneath the existing fill soils in each boring except B-8, residual soils were encountered to
depths ranging from 10 of 16 feet beneath the existing ground surface. The residual soil
encountered generally consisted of reddish brown and brown fat clay (CH) with varying amounts
of chert fragments. SPT N-values used to evaluate the consistency of the residual soil ranged
from 6 to 32 bpf, indicating a fine-grained soil consistency of firm to hard. The natural moisture
content of the residual soil samples tested ranged from approximately 18.7 to 34.9 percent.
Auger Refusal
Auger refusal conditions were encountered in five borings (B-1 through B-5) at depths ranging
from 11.5 to 16 feet below existing ground surface. Auger refusal is a designation applied to
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material that cannot be penetrated by the power auger. Auger refusal may indicate dense gravel
or cobble layers, boulders, rock ledges or pinnacles, or the top of continuous bedrock. Although
rock coring was beyond the scope of our services, we anticipate the refusal conditions
encountered likely corresponds with top of pinnacled bedrock.
Subsurface Water
Subsurface water was encountered in five of the borings at the completion of drilling. Borings B-
1 through B-5 encountered subsurface water at depths ranging from 9 to 14 feet below existing
ground surface. Subsurface water levels may fluctuate due to seasonal changes in precipitation
amounts. However, areas of perched water may exist in the overburden and/or near the contact
with bedrock. The groundwater information presented is based on results of this exploration only.
4.0 CONCLUSIONS AND RECOMMENDATIONS
4.1 SITE ASSESSMENT
The results of the subsurface exploration indicate that the site is generally underlain by
approximately 8 to 11 feet of existing fill material overlying residual soil. The fill soils encountered
were generally soft to firm in consistency and were generally free of deleterious material. The
residual soil encountered was generally firm to stiff consistency. Information pertaining to the age,
placement, and compaction of the existing fill was unavailable at the time of this report. There are
risks associated with construction on undocumented fill material. The owner should be aware of
these risks if the existing fill will be utilized for support of the structure or pavement. These risks
include soft compressible zones not disclosed by our soil test borings. Also, fill material may be
encountered in areas not explored that could contain abundant organic matter, compressible zones,
debris, and other deleterious materials. These materials, if present, could lead to differential
settlement of the proposed structure, potentially causing structural distress. Due to the variable
consistency of the fill material, GEOServices recommends that the existing fill material
encountered on-site not be utilized for direct foundation support.
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A full depth undercut and replacement of the existing fill soils may not be cost effective to reduce
the risk associated with the undocumented fill material given that a significant portion of the
existing fill material will likely be unsuitable for re-use as structural soil fill without significant
moisture conditioning (i.e. drying). Therefore, GEOServices recommends that the owner pursue the
option of remediating the existing fill soils by supporting the proposed structure on a rammed
aggregate pier remediated subgrade. A rammed aggregate pier reinforced subgrade is a viable
alternative and would provide sufficient remediation to support the proposed construction and
significantly reduce the risk associated with settlement of the fill material. In addition, rammed
aggregate piers will reduce the amount of soil haul-off / replacement and can be used to support the
proposed structure and concrete slab, if required.
While a full-depth undercut and replacement approach in the proposed parking areas and
driveways at this site would eliminate the risk associated with the existing fill in these areas, such
an approach may not be economically feasible. If the owner is willing to accept some risk
associated with the existing fill material, it is our opinion that the risk associated with the fill can
be significantly reduced by maintaining a minimum of 2 feet of newly placed, properly
compacted structural soil fill between a stable existing fill subgrade and the bottom of pavement
subgrade. We note based on results of our field exploration, it may be necessary to utilize
subgrade stabilizing geogrid in the pavement areas prior to the placement of new fill. However,
if the owner is not willing to accept the risk associated with the fill material, the existing fill
should be completely removed and replaced with structural soil fill to reach planned subgrade
elevation.
Upon removal of surficial layers, existing fill (as required), or low consistency residual soil (if
encountered), we recommend that the exposed subgrade be thoroughly proofrolled with a fully
loaded (with soil or rock), tandem-axle dump truck or other pneumatic tired construction
equipment of similar weight. A GEOServices geotechnical engineer, or qualified representative,
should observe proofrolling of all structural soil fill subgrade and concrete slab on grade
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subgrade prior to placement of fill or basestone. Areas observed to be unsuitable for use as
subgrade should be remediated at the geotechnical engineer’s direction. Remediation of these
areas would likely consist of an undercut and replacement with structural soil fill or compacted
dense graded aggregate.
Based on the conditions encountered in the geotechnical exploration and provided the
recommendations set forth in the following sections of this report are followed, the proposed
structure can be supported using conventional shallow foundations and/or concrete slabs-on-
grade bearing in newly placed structural soil fill, and/or a rammed aggregate pier remediated
subgrade.
4.2 SITE PREPARATION RECOMMENDATIONS
4.2.1 Subgrade
All vegetation, unsuitable soil, loose rock fragments greater than 6 inches, and other debris should
be removed from the proposed construction areas. After completion of stripping operations and any
required excavations to reach planned subgrade elevation, we recommend that the subgrade be
proofrolled with a fully-loaded, tandem-axle dump truck or other pneumatic-tired construction
equipment of similar weight. The geotechnical engineer or his representative should observe
proofrolling. Areas judged to perform unsatisfactorily by the engineer should be undercut and
replaced with structural soil fill or remediated at the geotechnical engineer's recommendation.
Areas to receive structural soil fill should also be proofrolled prior to the placement of any fill.
4.2.2 Structural Soil Fill
Material considered suitable for use as structural fill should be clean soil free of organics, trash, and
other deleterious material, containing no rock fragments greater than 6 inches in any one dimension.
Preferably, structural soil fill material should have a standard Proctor maximum dry density of 90
pcf or greater and a plasticity index (PI) of 35 percent or less. All material to be used as structural
fill should be tested by the geotechnical engineer to confirm that it meets the project requirements
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before being placed. Based on the results of our subsurface exploration, we expect the onsite soils
will NOT be suitable to be reused as structural fill.
Structural fill should be placed in loose, horizontal lifts not exceeding 8 inches in thickness. Each
lift should be compacted to at least 98 percent of the soil’s maximum dry density per the standard
Proctor method (ASTM D 698) and within the range of minus (-) 2 percent to plus (+) 3 percent of
the optimum moisture content. Each lift should be tested by geotechnical personnel to confirm that
the contractors’ method is capable of achieving the project requirements before placing any
subsequent lifts. Any areas which have become soft or frozen should be removed before additional
structural fill is placed.
4.2.3 Dense Graded Aggregate
Dense graded aggregate (DGA) fill may be required as backfill, to reach finished floor elevation.
The dense graded aggregate used should be Type A and Grading D or E in accordance with Section
903.05 of the Tennessee Department of Transportation (TDOT) specifications, or an engineer
approved equivalent material. The DGA fill should be placed in loose, horizontal lifts not
exceeding 8 inches in loose thickness. Each lift should be compacted to at least 98 percent of
maximum dry density per the standard Proctor method (ASTM D 698) and within the range of
minus (-) 2 to plus (+) 3 percent of the optimum moisture content. Each lift should be compacted,
tested by geotechnical personnel and approved before placing any subsequent lifts.
4.3 FOUNDATION RECOMMENDATIONS
4.3.1 Shallow Foundations
Foundations for the proposed construction are anticipated to bear on soils improved using rammed
aggregate piers. The rammed aggregate piers should be designed to improve the existing soils to be
capable of withstanding the designed bearing pressures. Even if design loads would allow smaller
sizes, we recommend that continuous footings be a minimum of 18 inches wide and isolated spread
footings be a minimum of 24 inches wide to reduce the possibility of a localized punching shear
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failure. Exterior footings should be designed to bear at least 18 inches below finished exterior grade
to protect against frost heave.
Detailed foundation subgrade observations should be performed by a GEOServices geotechnical
engineer, or his qualified representative so that the recommendations provided in this report are
consistent with the site conditions encountered. A dynamic cone penetrometer (DCP) is commonly
utilized to provide information that is compared to the data obtained in the geotechnical report.
Where unacceptable materials are encountered, the material should be excavated to stiff, suitable
soils or remediated at the geotechnical engineer’s direction. Typical remedial measures consist of
undercutting, overexcavation, or combinations thereof.
4.3.2 Slabs-on-Grade
For slab-on-grade construction, the site should be prepared as previously described. We recommend
that the subgrade be topped with a minimum 4-inch layer of crushed stone to act as a capillary
moisture block. The subgrade should be proofrolled and approved prior to the placement of the
crushed stone. Based on the conditions encountered on this site, we recommend that the floor slabs
be designed using a subgrade modulus of 90 pounds per cubic inch (pci). This modulus is
appropriate for small diameter loads (i.e. a 1ft x 1ft plate) and should be adjusted for wider loads.
Additionally, if rammed aggregate piers are installed beneath slabs-on-grade the subgrade modulus
will be improved. The increase in subgrade modulus will be dependent on rammed aggregate pier
parameters (e.g. size, spacing, etc.). Therefore, the rammed aggregate pier designer will provide a
new subgrade modulus. Partial undercutting and replacement of the existing soft fill will likely be
required to correction slab subgrade support conditions if rammed aggregate piers are not used for
soil improvement.
4.3.3 Settlement
Based on the results of our geotechnical exploration, anticipated structural loads, and under the
assumption that the existing soil is remediated with rammed aggregate piers, we anticipate total
settlements of less than 1 inch and differential settlements of less than 0.5 inch could be
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experienced by the proposed structure. GEOServices should be retained to observe and document
the installation of the rammed aggregate piers to ensure that the recommendations provided in
this report are properly implemented in the field.
4.4 SEISMIC DESIGN CRITERIA
International Building Code, 2012
In accordance with the International Building Code, 2012, we have provided the following table of
seismic design information. After evaluating the subsurface conditions, it was determined that the
Seismic Site Class D would be most appropriate of the provided classes. A table follows, showing
the calculated spectral response accelerations for both a short and 1-second period.
Table 1: Seismic Design Parameters
Structure Ss S1 SDS SD1
g g g g
Commercial Building 0.371 0.121 0.372 0.187
4.5 PAVEMENT DESIGN RECOMMENDATIONS
4.5.1 Flexible Pavement Design
AASHTO flexible pavement design methods have been utilized for pavement recommendations.
Our recommendations are based on the assumptions that the subgrade has been properly prepared
as described previously. At this site, undercutting and replacement possibly in conjunction with the
use of geogrid reinforcement will be required to correction subgrade support conditions. Based on
our experience with similar developments, we recommend the following light and heavy-duty
flexible pavement sections:
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Table 2: Flexible Pavement Recommendations
Pavement Materials Light-Duty Heavy-Duty
Bituminous Asphalt Surface Mix 1.5 1.5
Bituminous Asphalt Base Mix 2.0 3.0
Compacted Crushed Aggregate Base 6.0 8.0
We recommend a base stone equivalent to a Type A and Grading D in accordance with Section
903.05 of the TDOT specifications. The bituminous asphalt pavement should be Grading "E" as per
Section 411 for the surface mix and Grading “BM” as per section 307 for the binder mix.
Compaction requirements for the crushed aggregate base and the bituminous asphalt pavement
should generally follow TDOT specifications.
4.5.2 Rigid Pavement Design
AASHTO rigid pavement design methods have been utilized for pavement recommendations. In
areas of trash dumpster pads or areas where large trucks will be parked on the pavement, we
recommend the use of a concrete paving section. Our recommendations are based on the
assumptions that the subgrade has been properly prepared which will likely require undercutting
and replacement possibly in conjunction with geogrid reinforcement. Based on our experience with
similar developments, we recommend the following rigid pavement section:
Table 3: Rigid Pavement Recommendations
Pavement Materials Light-Duty Heavy-Duty
4,000 psi Type I Concrete 6.0 8.0
Compacted Crushed Aggregate Base 4.0 6.0
Concrete should be reinforced with welded wire fabric or reinforcing bars to assist in controlling
cracking from drying shrinkage and thermal changes. Sawed or formed control joints should be
included for each 225 square feet of area or less (15 feet by 15 feet). Saw cuts should not cut
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through the welded wire fabric or reinforcing steel and dowels should be utilized at formed
and/or cold joints.
4.5.3 General
Our recommendations are based upon the assumption that the subgrade has been properly prepared
as described in previous sections and that if used, off-site soil borrow to be used to backfill to the
final subgrade meets the requirements of the structural fill section. Given the soft existing fill
encountered in the borings, it is likely undercutting and replacement or other alternative will be
required to correct foundation support conditions.
The paved areas should be constructed with positive drainage to direct water off-site and to
minimize surface water seeping into the pavement subgrade. The subgrade should have a minimum
slope of 1 percent. In down grade areas, the basestone should extend through the slope to allow any
water entering the basestone to exit. For rigid pavements, water-tight seals should also be provided
at formed construction and expansion joints.
We understand that budgetary considerations sometimes warrant thinner pavement sections than
those presented. However, the client, owner, and project designers should be aware that thinner
pavement sections may result in increased maintenance costs and lower than anticipated
pavement life. If thinner pavement sections are warranted, alternate reinforced pavement sections
can be considered, including the use of geo-grid reinforcement.
5.0 CONSTRUCTION CONSIDERATIONS
5.1 FOUNDATION CONSTRUCTION
Foundation excavations should be opened, the subgrade evaluated, remedial work performed (if
required), and concrete placed in an expeditious manner. Exposure to weather often reduces
foundation support capabilities, thus necessitating remedial measures prior to concrete placement. It
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is also important that proper surface drainage be maintained both during construction (especially in
terms of maintaining dry footing trenches) and after construction. Soil backfill for footings should
be placed in accordance with the recommendations for structural fill presented herein.
5.2 EXCAVATIONS
As previously mentioned, auger refusal materials were encountered at depths ranging from 11.5
to 16 feet. Auger refusal conditions generally correspond to materials which require difficult
excavation techniques for removal. Typically, soils penetrated by augers can be removed with
conventional earthmoving equipment. However, excavation equipment varies, and field refusal
conditions may vary. Generally, the weathering process is erratic and variations in the rock
profile can occur in small lateral distances. Based on our subsurface exploration and the
anticipated maximum excavation depth of about 5 feet, we do not anticipate that difficult
excavation will present a significant challenge at this site. However, in this geologic setting, it is
possible that some partially weathered rock and/or rock pinnacles or ledges requiring difficult
excavation techniques may be encountered in site areas between our boring locations.
5.2.1 Excavation Safety
Excavations should be sloped or shored in accordance with local, state, and federal regulations,
including OSHA (29 CFR Part 1926) excavation trench safety standards. The contractor is usually
solely responsible for site safety. This information is provided only as a service, and under no
circumstances should GEOServices be assumed responsible for construction site safety.
5.3 HIGH PLASTICITY SOIL CONSIDERATIONS
Based on our experience in the East Tennessee area, soils with plasticity indices (PI) less than 30
percent have a slight potential for volume changes with changes in moisture content, and soils
with a PI greater than 50 percent are highly susceptible to volume changes. Between these values,
we consider the soils to be moderately susceptible to volume changes. With plastic indices of
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from 42 percent, the onsite soils have a moderate potential for volume change with significant
moisture changes.
Highly plastic soils have the potential to shrink or swell with significant changes in moisture
content. Unlike other areas of the country where high plasticity soils cause considerable
foundation problems, this region does not typically endure long periods of severe drought or wet
weather. However, in recent years drought conditions have been sufficient to cause soil
shrinkage and related structural distress of buildings, floor slabs and pavements at sites underlain
by high plasticity soils.
At sites that have high plasticity soils, certain precautions should be considered to minimize or
eliminate the potential for volume changes. The most effective way to eliminate the potential for
volume changes is to remove highly plastic soils and replace them with compacted fill of non-
expansive material. Testing and recommendations for the required depth of removal can be
provided, if needed. If removal of the highly plastic soils is not desirable, then measures should
be taken to protect the soils from excessive amounts of wetting or drying. In addition,
modification of the soils by lime or cement treatment can be utilized to reduce the soil plasticity.
Several construction considerations may reduce the potential for volume changes in the subgrade
soils. Foundations should be excavated, checked, and concreted in the same day to prevent
excessive wetting or drying of the foundation soils. The floor subgrade should be protected from
excessive drying and wetting by covering the subgrade prior to slab construction. The site should
be graded in order to drain surface water away from the building both during and after
construction. Installing moisture barriers around the perimeter of the slab will help limit the
moisture variation of the soil and reduce the potential for shrinking or swelling. In addition, roof
drains should discharge water away from the building area and foundations. Heat sources should
be isolated from foundation soils to minimize drying of the foundation soils. Trees and large
shrubs can draw large amounts of moisture from the soil during dry weather and should be kept
Report of Geotechnical Exploration GEOServices Project No. 21-17664
Oak Ridge Main Street Outparcel L – Oak Ridge, Tennessee September 22, 2017
16
well away from the building to prevent excessive drying of the foundation soils. Watering of
lawns or landscaped areas should be performed to maintain moisture levels during dry weather.
Structural details to make the building flexible should be considered to accommodate potential
volume changes in the subgrade. Floor slabs should be liberally jointed to control cracking, and
the floor slab should not be structurally connected to the walls. Walls should incorporate
sufficient expansion/contraction joints to allow for differential movement.
5.4 MOISTURE SENSITIVE SOILS
The moderately plastic fine-grained soils encountered at this site will be sensitive to disturbances
caused by construction traffic and changes in moisture content. During wet weather periods,
increases in the moisture content of the soil can cause significant reduction in the soil strength and
support capabilities. Construction traffic patterns should be varied to prevent the degradation of
previously stable subgrade. In addition, the soils at this site which become wet may be slow to dry
and thus significantly retard the progress of grading and compaction activities. We caution if site
grading is performed during the wet weather season increases in the undercut volume required due
to the marginal fills should be expected. Further for site fills, methods such as discing and allowing
the material to dry will be required to meet the required compaction recommendations. It will,
therefore, be advantageous to perform earthwork and foundation construction activities during dry
weather. However, November through March is typically the difficult grading period due to the
limited drying conditions that exist.
5.5 DRAINAGE AND SURFACE WATER CONCERNS
To reduce the potential for undercut and construction induced sinkholes, water should not be
allowed to collect in the foundation excavations, on floor slab areas, or on prepared subgrades of
the construction area either during or after construction. Undercut or excavated areas should be
sloped toward one corner to facilitate removal of any collected rainwater, subsurface water, or
Report of Geotechnical Exploration GEOServices Project No. 21-17664
Oak Ridge Main Street Outparcel L – Oak Ridge, Tennessee September 22, 2017
17
surface runoff. Positive site surface drainage should be provided to reduce infiltration of surface
water around the perimeter of the building and beneath the floor slab. The grades should be sloped
away from the building and surface drainage should be collected and discharged such that water is
not permitted to infiltrate the backfill and floor slab areas of the building.
5.6 SINKHOLE RISK REDUCTION AND CORRECTIVE ACTIONS
Based on our experience, corrective actions can also be performed to reduce the potential for
sinkhole development at this site. These corrective actions would decrease but not eliminate the
potential for sinkhole development. Much can be accomplished to decrease the potential of future
sinkhole activity by proper grade selection and positive site drainage.
In general, the portions of a site that are excavated to achieve the desired grades will have a higher
risk of sinkhole development than the areas that are filled, because of the exposure of relic fractures
in the soil to rainfall and runoff. On the other hand, those portions of a site that receive a modest
amount of fill (or that have been filled in the past) will have a decreased risk of sinkhole
development caused by rainfall or runoff because the placement of a cohesive soil fill over these
areas effectively caps the area with a relatively impervious “blanket” of remolded soil. Therefore,
the recommendations that follow incorporate a modest remedial treatment program designed to
make the surface of the soil in excavated areas less permeable.
Although it is our opinion that the risk of ground subsidence associated with sinkhole formation
cannot be eliminated, however, we have found that several measures are useful in site design and
development to reduce this potential risk. These measures include:
• Maintaining positive site drainage to route surface waters well away from
structural areas both during construction and for the life of the structure.
• The scarification and re-compaction of the upper 6 to 10 inches of soil in
earthwork cut areas.
• Verifying that subsurface piping beneath structures is carefully constructed
and pressure tested prior to its placement in service.
Report of Geotechnical Exploration GEOServices Project No. 21-17664
Oak Ridge Main Street Outparcel L – Oak Ridge, Tennessee September 22, 2017
18
• The use of pavement or lined ditches, particularly in cut areas, to collect
and transport surface water to areas away from structures.
Considerations when building within a sinkhole prone area are to provide positive surface drainage
away from any proposed building or parking area both during and after construction. Backfill in
utility trenches of other excavations should consist of compacted, well-graded material such as
dense graded aggregate or compacted on site soils. The use of an open graded stone such as No. 57
stone is not recommended unless the stone backfill is provided an exit path and not allowed to
pond. If sinkhole conditions are observed, the type of corrective action is most appropriately
determined by a geotechnical engineer on a case-by-case basis.
6.0 LIMITATIONS
This report has been prepared in accordance with generally accepted geotechnical engineering
practice for specific application to this project. This report is for our geotechnical work only, and no
environmental assessment efforts have been performed. The conclusions and recommendations
contained in this report are based upon applicable standards of our practice in this geographic area
at the time this report was prepared. No other warranty, express or implied, is made.
The analyses and recommendations submitted herein are based, in part, upon the data obtained from
the exploration. The nature and extent of variations between the borings will not become evident
until construction. We recommend that GEOServices be retained to observe the project
construction in the field. GEOServices cannot accept responsibility for conditions which deviate
from those described in this report if not retained to perform construction observation and testing. If
variations appear evident, then we will re-evaluate the recommendations of this report. In the event
that any changes in the nature, design, or location of the structures are planned, the conclusions and
recommendations contained in this report will not be considered valid unless the changes are
reviewed and conclusions modified or verified in writing. Also, if the scope of the project should
change significantly from that described herein, these recommendations may need to be re-
evaluated.
APPENDIX A
Figures and Test Boring Records
FIGURETBW
N.T.S.Oak Ridge Main Street
Oak Ridge, TN
SITE LOCATION PLANTBW
09/22/17
21-17664
N
1.) BASE MAP: USGS Qaud Map (Windrock MAPS)
NOTES:
Outparcel L
B-1
B-2
B-4
B-3
B-5
B-6
B-7
B-8
FIGURETBW
N.T.S.
BORING LOCATION PLANTBW
09/22/17
21-17664
1.) BORING LOCATIONS ARE SHOWN IN GENERAL ARRANGMENT ONLY.
2.) DO NOT USE BORING LOCATIONS FORDETERMINATIONS OF DISTANCES OR QUANTITIES.
3.) BASE MAP PROVIDED BY: Realty Link LLC & GOOGLE EARTH, INC.
LOCATION OF SOIL TEST BORING
NOTES:
N
Oak Ridge Main Street
Oak Ridge, TN
Outparcel L
1
DRILLER
ON-SITE REP.
BORING NO. / LOCATION
DATE FT.
REFUSAL: Yes DEPTH 16.0 FT. ELEV. -16.0 FT. COMPLETION: DEPTH 14.0 FT.
SAMPLED 16.0 FT. 4.9 M ELEV. -14.0 FT.
TOP OF ROCK DEPTH FT. ELEV. FT. AFTER 1 HRS: DEPTH TNP FT.
BEGAN CORING DEPTH FT. ELEV. FT. ELEV. FT.
FOOTAGE CORED (LF) FT. AFTER 24 HRS. DEPTH TNP FT.
BOTTOM OF HOLE DEPTH 16.0 FT. ELEV. -16.0 FT. ELEV. FT.
BORING ADVANCED BY: X PROPOSED FFE: FT..
FIELD LABORATORY
SAMPLE RESULTS RESULTS
FT. ELEV. TYPE N-Value Qu LL PI %M
SS
SS 64 42
SS
SS
SS
Fat CLAY (CH) - with rock fragments - reddish
brown and brown - moist (FILL)
Auger Refusal at 16 feet
Oak Ridge Main Street - Outparcel L LOG OF BORING B-1Oak Ridge, TN SHEET 1 OF
September 13, 2017
GEOServices Project # 21-17664 M&W Drilling
No
POWER AUGERING
STRATUM SAMPLE DEPTH SAMPLE
B-1 DRY ON COMPLETION ?
SURFACE ELEV. WATER LEVEL DATA (IF APPLICABLE)
DEPTH FROM TO OR STRATUM DESCRIPTION
FT. FT. RUN NO.
91..0 2.5 1
2.5 -2.5
3.5 5.0 2
5.0 -5.0
6.0 7.5 3
7.5 -7.5
8.5 10.0 4
10.0 -10.0
12.5 -12.5
13.5 15.0 5
15.0 -15.0
Fat CLAY (CH) - with trace chert fragments-
brown and light brown - moist - stiff to hard
(RESIDUUM)
REMARKS:
20.0 -20.0
17.5 -17.5
22.1
17.7
28.9
32.5
34.9
9
10
11
32
1
DRILLER
ON-SITE REP.
BORING NO. / LOCATION
DATE FT.
REFUSAL: Yes DEPTH 16.0 FT. ELEV. -16.0 FT. COMPLETION: DEPTH 13.0 FT.
SAMPLED 16.0 FT. 4.9 M ELEV. FT.
TOP OF ROCK DEPTH FT. ELEV. FT. AFTER 1 HRS: DEPTH TNP FT.
BEGAN CORING DEPTH FT. ELEV. FT. ELEV. FT.
FOOTAGE CORED (LF) FT. AFTER 24 HRS. DEPTH TNP FT.
BOTTOM OF HOLE DEPTH 16.0 FT. ELEV. -16.0 FT. ELEV. FT.
BORING ADVANCED BY: X PROPOSED FFE: FT..
FIELD LABORATORY
SAMPLE RESULTS RESULTS
FT. ELEV. TYPE N-Value Qu LL PI %M
SS
SS
SS
SS
SS
Fat CLAY (CH) - with rock fragments - reddish
brown and brown - moist (FILL)
Fat CLAY (CH) - with trace chert fragments-
brown and light brown - moist - stiff to firm
(RESIDUUM)
Auger Refusal at 16 feet
Oak Ridge Main Street - Outparcel L LOG OF BORING B-2Oak Ridge, TN SHEET 1 OF
B-2 DRY ON COMPLETION ? No
September 13, 2017 SURFACE ELEV. WATER LEVEL DATA (IF APPLICABLE)
GEOServices Project # 21-17664 M&W Drilling
POWER AUGERING
STRATUM SAMPLE DEPTH SAMPLE
DEPTH FROM TO OR STRATUM DESCRIPTION
FT. FT. RUN NO.
61..0 2.5 1
2.5 -2.5
3.5 5.0 2
5.0 -5.0
6.0 7.5 3
7.5 -7.5
8.5 10.0 4
10.0 -10.0
12.5 -12.5
17.5 -17.5
13.5 14.8 5
15.0 -15.0
20.0 -20.0
REMARKS:
19.4
20.7
21.5
21.2
28.4
9
9
7
6
1
DRILLER
ON-SITE REP.
BORING NO. / LOCATION
DATE FT.
REFUSAL: Yes DEPTH 11.5 FT. ELEV. -11.5 FT. COMPLETION: DEPTH 9.0 FT.
SAMPLED 11.5 FT. 3.5 M ELEV. -9.0 FT.
TOP OF ROCK DEPTH FT. ELEV. FT. AFTER 1 HRS: DEPTH TNP FT.
BEGAN CORING DEPTH FT. ELEV. FT. ELEV. FT.
FOOTAGE CORED (LF) FT. AFTER 24 HRS. DEPTH TNP FT.
BOTTOM OF HOLE DEPTH 11.5 FT. ELEV. -11.5 FT. ELEV. FT.
BORING ADVANCED BY: X PROPOSED FFE: FT..
FIELD LABORATORY
SAMPLE RESULTS RESULTS
FT. ELEV. TYPE N-Value Qu LL PI %M
SS
SS
SS
SS
M&W Drilling
Oak Ridge Main Street - Outparcel L LOG OF BORING B-3Oak Ridge, TN SHEET 1 OF
B-3 DRY ON COMPLETION ? No
September 13, 2017 SURFACE ELEV. WATER LEVEL DATA (IF APPLICABLE)
GEOServices Project # 21-17664
POWER AUGERING
STRATUM SAMPLE DEPTH SAMPLE
DEPTH FROM TO OR STRATUM DESCRIPTION
FT. FT. RUN NO.
Fat CLAY (CH) - with rock fragments - reddish
brown and brown - moist (FILL)
61..0 2.5 1
2.5 -2.5
3.5 5.0 2
5.0 -5.0
6.0 7.5 3
7.5 -7.5
8.5 10.0 4
12.5 -12.5
10.0 -10.0
17.5 -17.5
15.0 -15.0
20.0 -20.0
REMARKS:
6
7
6 Fat CLAY (CH) - with trace chert fragments-
brown and light brown - moist - firm
(RESIDUUM)
Auger refusal at 11.5 feet
1
DRILLER
ON-SITE REP.
BORING NO. / LOCATION
DATE FT.
REFUSAL: Yes DEPTH 13.0 FT. ELEV. -13.0 FT. COMPLETION: DEPTH 12.0 FT.
SAMPLED 13.0 FT. 4.0 M ELEV. -12.0 FT.
TOP OF ROCK DEPTH FT. ELEV. FT. AFTER 1 HRS: DEPTH TNP FT.
BEGAN CORING DEPTH FT. ELEV. FT. ELEV. FT.
FOOTAGE CORED (LF) FT. AFTER 24 HRS. DEPTH TNP FT.
BOTTOM OF HOLE DEPTH 13.0 FT. ELEV. -13.0 FT. ELEV. FT.
BORING ADVANCED BY: X PROPOSED FFE: FT..
FIELD LABORATORY
SAMPLE RESULTS RESULTS
FT. ELEV. TYPE N-Value Qu LL PI %M
SS
SS
SS
SS
REMARKS:
17.5 -17.5
20.0 -20.0
Fat CLAY (CH) - with rock fragments - reddish
brown and brown - moist (FILL)
Fat CLAY (CH) - with trace chert fragments-
brown and light brown - moist - stiff
(RESIDUUM)
Auger refusal at 13 feet
15.0 -15.0
12.5 -12.5
4
10.0 -10.0
8.5
-7.5
12 18.710.0
11 16.6
5.0 -5.0
6.0 7.5 3
7.5
17.8
2.5 -2.5
163.5 5.0 2
1..0 2.5 1
STRATUM DESCRIPTION
FT. FT. RUN NO.
5 16.7
POWER AUGERING
STRATUM SAMPLE DEPTH SAMPLE
DEPTH FROM TO OR
B-4 DRY ON COMPLETION ? No
September 13, 2017 SURFACE ELEV. WATER LEVEL DATA (IF APPLICABLE)
GEOServices Project # 21-17664 M&W Drilling
Oak Ridge Main Street - Outparcel L LOG OF BORING B-4Oak Ridge, TN SHEET 1 OF
1
DRILLER
ON-SITE REP.
BORING NO. / LOCATION
DATE FT.
REFUSAL: Yes DEPTH 13.0 FT. ELEV. -13.0 FT. COMPLETION: DEPTH 9.0 FT.
SAMPLED 13.0 FT. 4.0 M ELEV. -9.0 FT.
TOP OF ROCK DEPTH FT. ELEV. FT. AFTER 1 HRS: DEPTH TNP FT.
BEGAN CORING DEPTH FT. ELEV. FT. ELEV. FT.
FOOTAGE CORED (LF) FT. AFTER 24 HRS. DEPTH TNP FT.
BOTTOM OF HOLE DEPTH 13.0 FT. ELEV. -13.0 FT. ELEV. FT.
BORING ADVANCED BY: X PROPOSED FFE: FT..
FIELD LABORATORY
SAMPLE RESULTS RESULTS
FT. ELEV. TYPE N-Value Qu LL PI %M
SS
SS
SS
SS
Fat CLAY (CH) - with rock fragments - reddish
brown and brown - moist (FILL)
Fat CLAY (CH) - with trace chert fragments-
brown and light brown - moist - stiff
(RESIDUUM)
Auger refusal at 13 feet
Oak Ridge Main Street - Outparcel L LOG OF BORING B-5Oak Ridge, TN SHEET 1 OF
GEOServices Project # 21-17664 M&W Drilling
B-5 DRY ON COMPLETION ? no
September 13, 2017 SURFACE ELEV. WATER LEVEL DATA (IF APPLICABLE)
POWER AUGERING
STRATUM SAMPLE DEPTH SAMPLE
DEPTH FROM TO OR STRATUM DESCRIPTION
FT. FT. RUN NO.
101..0 2.5 1
2.5 -2.5
63.5 5.0 2
5.0 -5.0
8.5
66.0 7.5 3
7.5 -7.5
810.0 4
10.0 -10.0
12.5 -12.5
15.0 -15.0
17.5 -17.5
REMARKS:
20.0 -20.0
1
DRILLER
ON-SITE REP.
BORING NO. / LOCATION
DATE FT.
REFUSAL: no DEPTH FT. ELEV. FT. COMPLETION: DEPTH Dry FT.
SAMPLED 10.0 FT. 3.0 M ELEV. FT.
TOP OF ROCK DEPTH FT. ELEV. FT. AFTER 1 HRS: DEPTH TNP FT.
BEGAN CORING DEPTH FT. ELEV. FT. ELEV. FT.
FOOTAGE CORED (LF) FT. AFTER 24 HRS. DEPTH TNP FT.
BOTTOM OF HOLE DEPTH 10.0 FT. ELEV. -10.0 FT. ELEV. FT.
BORING ADVANCED BY: X PROPOSED FFE: FT..
FIELD LABORATORY
SAMPLE RESULTS RESULTS
FT. ELEV. TYPE N-Value Qu LL PI %M
SS
SS
SS
SS
REMARKS:
Fat CLAY (CH) - with trace chert fragments-
brown and light brown - dry to moist - firm
(RESIDUUM)
Boring Terminated at 10 feet
20.0 -20.0
17.5 -17.5
15.0 -15.0
12.5 -12.5
10.0 -10.0
31.78.5
7.5 3
7.5 -7.5
710.0 4
7 33.86.0
3.5 5.0 2
5.0 -5.0
6 27.9
2.5 1
2.5 -2.5
8 23.3
Fat CLAY (CH) - with rock fragments - reddish
brown and brown - moist (FILL)
1..0
DEPTH FROM TO OR STRATUM DESCRIPTION
FT. FT. RUN NO.
September 13, 2017 SURFACE ELEV. WATER LEVEL DATA (IF APPLICABLE)
POWER AUGERING
STRATUM SAMPLE DEPTH SAMPLE
GEOServices Project # 21-17664 M&W Drilling
B-6 DRY ON COMPLETION ? Yes
Oak Ridge Main Street - Outparcel L LOG OF BORING B-6Oak Ridge, TN SHEET 1 OF
1
DRILLER
ON-SITE REP.
BORING NO. / LOCATION
DATE FT.
REFUSAL: no DEPTH FT. ELEV. FT. COMPLETION: DEPTH Dry FT.
SAMPLED 10.0 FT. 3.0 M ELEV. FT.
TOP OF ROCK DEPTH FT. ELEV. FT. AFTER 1 HRS: DEPTH TNP FT.
BEGAN CORING DEPTH FT. ELEV. FT. ELEV. FT.
FOOTAGE CORED (LF) FT. AFTER 24 HRS. DEPTH TNP FT.
BOTTOM OF HOLE DEPTH 10.0 FT. ELEV. -10.0 FT. ELEV. FT.
BORING ADVANCED BY: X PROPOSED FFE: FT..
FIELD LABORATORY
SAMPLE RESULTS RESULTS
FT. ELEV. TYPE N-Value Qu LL PI %M
SS
SS
SS
SS
REMARKS:
20.0 -20.0
17.5 -17.5
15.0 -15.0
Boring Terminated at 10 feet10.0 -10.0
12.5 -12.5
22.2
Fat CLAY (CH) - with trace chert fragments-
brown and light brown - dry to moist - firm
(RESIDUUM)8.5
3
7.5 -7.5
1510.0 4
4 20.66.0 7.5
3.5 5.0 2
5.0 -5.0
5 20.7
2.5 1
2.5 -2.5
5 12.7
Fat CLAY (CH) - with rock fragments - reddish
brown and brown - moist (FILL)
1..0
DEPTH FROM TO OR STRATUM DESCRIPTION
FT. FT. RUN NO.
September 13, 2017 SURFACE ELEV. WATER LEVEL DATA (IF APPLICABLE)
POWER AUGERING
STRATUM SAMPLE DEPTH SAMPLE
GEOServices Project # 21-17664 M&W Drilling
B-7 DRY ON COMPLETION ? Yes
Oak Ridge Main Street - Outparcel L LOG OF BORING B-7Oak Ridge, TN SHEET 1 OF
1
DRILLER
ON-SITE REP.
BORING NO. / LOCATION
DATE FT.
REFUSAL: no DEPTH FT. ELEV. FT. COMPLETION: DEPTH Dry FT.
SAMPLED 10.0 FT. 3.0 M ELEV. FT.
TOP OF ROCK DEPTH FT. ELEV. FT. AFTER 1 HRS: DEPTH TNP FT.
BEGAN CORING DEPTH FT. ELEV. FT. ELEV. FT.
FOOTAGE CORED (LF) FT. AFTER 24 HRS. DEPTH TNP FT.
BOTTOM OF HOLE DEPTH 10.0 FT. ELEV. -10.0 FT. ELEV. FT.
BORING ADVANCED BY: X PROPOSED FFE: FT..
FIELD LABORATORY
SAMPLE RESULTS RESULTS
FT. ELEV. TYPE N-Value Qu LL PI %M
SS
SS
SS
SS
REMARKS:
Fat CLAY (CH) - with rock fragments - reddish
brown and brown - moist (FILL)
20.0 -20.0
17.5 -17.5
15.0 -15.0
Boring Terminated at 10 feet10.0 -10.0
12.5 -12.5
278.5
3
7.5 -7.5
810.0 4
8 23.16.0 7.5
3.5 5.0 2
5.0 -5.0
9 22.3
1
2.5 -2.5
16 18.31..0 2.5
DEPTH FROM TO OR STRATUM DESCRIPTION
FT. FT. RUN NO.
September 13, 2017 SURFACE ELEV. WATER LEVEL DATA (IF APPLICABLE)
POWER AUGERING
STRATUM SAMPLE DEPTH SAMPLE
GEOServices Project # 21-17664 M&W Drilling
B-8 DRY ON COMPLETION ? Yes
Oak Ridge Main Street - Outparcel L LOG OF BORING B-8Oak Ridge, TN SHEET 1 OF
APPENDIX B
Soil Laboratory Testing Results
Natural Percent
Boring Sample Depth Moisture Soil Organic
Number Number (feet) Content LL PL PI Type Content
B-1 1 1.0-2.5' 22.1%
2 3.5-5.0' 17.7% 64 22 42 CH
3 6.0-7.5' 28.9%
4 8.5-10.0' 32.5%
5 13.5-15.0' 34.9%
B-2 1 1.0-2.5' 19.4%
2 3.5-5.0' 20.7%
3 6.0-7.5' 21.5%
4 8.5-10.0' 21.2%
5 13.5-15.0' 28.4%
B-4 1 1.0-2.5' 16.7%
2 3.5-5.0' 17.8%
3 6.0-7.5' 16.6%
4 8.5-10.0' 18.7%
B-6 1 1.0-2.5' 23.3%
2 3.5-5.0' 27.9%
3 6.0-7.5' 33.8%
4 8.5-10.0' 31.7%
B-7 1 1.0-2.5' 12.7%
2 3.5-5.0' 20.7%
3 6.0-7.5' 20.6%
4 8.5-10.0' 22.2%
B-8 1 1.0-2.5' 18.3%
2 3.5-5.0' 22.3%
3 6.0-7.5' 23.1%
4 8.5-10.0' 27.0%
Oak Ridge Main Street "L"
GEOServices Project No. 21-17664
September 21, 2017
SOIL DATA SUMMARY
Atterberg Limits
GEOServices, LLC - 2561 Willow Point Way Knoxville. Tennessee, 37931 - Phone: (865) 573-6130 Fax: (865) 573-6132