1219 Jasmine St. Geotechnical Report 10.20.21OF JAX, INC.
BEACHES HABITAT FOR HUMANITY
797 Mayport Road
Atlantic Beach, Florida 32233
Attn: Mr. Josh Jared
Re: Report of Preliminary Geotechnical Exploration & Engineering Evaluation
Proposed Residence - 1219 Jasmine Street
Atlantic Beach, Florida
AGES Job No. J2004, Report No. 001
Ladies and Gentlemen:
October 20, 2021
AGES of JAX, INC. (AGES) has completed a preliminary geotechnical exploration and engineering
evaluation of the subsurface conditions beneath the building construction area of the referenced lot. Our
geotechnical exploration was performed in accordance with AGES' Service Authorization Sheet which was
dated July 7, 2021. Formal authorization of our services was provided by Beaches Habitat representative
Josh Jared on August 19, 2021. This report briefly describes our understanding of the planned construction,
describes the field testing that was performed and the results that were obtained, and presents our
geotechnical evaluation of the soils conditions are the site.
1.0 PROJECT INFORMATION
General information has been provided by Charles Kennedy P.E. during recenttelephone and email
conversations. We have not been provided with either a boundary survey of Site Plan. We understand
that Beaches Habitat is planning to constructa residential structure on a vacant grassed lotwhich is located
at 1219 Jasmine Street in Atlantic Beach, Florida.
We have assumed thatthe construction will include a 1 or2-storywood and block framed structure.
Estimated column and wall loads will be on the order of 50 kips and 2 klf, respectively. The proposed finish
floor elevation and existing ground surface elevation data have not been provided. However, we have
assumed that 3 feet or less of elevating fill will be added to the site.
2.0 GEOTECHNICAL EXPLORATION
The field exploration program which was performed on September 17, 2021 included two(2)15 -feet
deep penetration test borings (B1 & B2) and three(3) 4 to 4.5 -feet deep auger borings (Al - A3). The field
test locations were established by our personnel using hand held GPS location devices. The boring
locations, as shown on the Field Exploration Plan, should be considered approximate. The ground surface
elevations at the boring locations were not determined.
The attached Test Boring and Auger Boring Records presentthe descriptions of the subsurface soils
encountered, the groundwater levels encountered and the penetration resistance values recorded when
AGES of JAX, Inc.
P O Box 24008, Jacksonville F132241.4008
9556 Historic Kings Road South, Suite 201 0 Jacksonville, Florida 32257-2010
(904) 886-0766 0 (904) 880-5190 (FAX)
PROPOSED RESIDENCE -1219 JASMINE STREET October 20, 2021
Atlantic Beach, Florida Page 2
drilling and sampling the test borings. The subsurface conditions are graphically illustrated on the attached
Generalized Subsurface Profile (GSP) sheet. The stratification lines and depth designations on the boring
records represent the approximate boundary between the various soils encountered, as determined in the
field by our drillers; and the transition from one strata to the next should be considered approximate. A brief
discussion of the drilling, sampling, and field testing techniques used during the geotechnical exploration
is provided in the attached Field Exploration Procedures section.
Representative soil samples obtained during our field exploration were returned to our laboratory.
The samples were examined by a geotechnical engineerand were visually classified in general accordance
with ASTM D 2488 (Unified Soil Classification System).
3.0 FINDINGS
The subsurface conditions outlined below highlight the major subsurface stratifications encountered
during this geotechnical exploration at the site. More detailed descriptions of the subsurface materials
encountered during this exploration are provided on the attached boring records. When reviewing the
boring records and the subsurface conditions outlined below, it should be understood that the subsurface
conditions will vary across the proposed construction area and between the boring locations.
Borings B1 & B2 typically encountered an approximate 6 -feet thick surface stratum of very loose
to loose slightly silty fine sand (SP to SP -SM) and silty fine sand (SM) which exhibited penetration
resistance values ranging from 4 to 7 blows/foot. The surface stratum was underlain by buried organics and
domestic trash (paper, glass, wood, plastic) which extended to at depth of 12 feet at boring location B1 and
to a depth 8 feet at boring location B2. Below the trash layer and extending to the boring termination depth
of 20 feet, firm to very firm slightly silty fine sand (SP - SM) was encountered. The penetration resistance
values within this stratum typically ranged from 15 to 28 blows/foot.
Auger borings Al - A3 typically encountered a 1 to 4 feet thick stratum of slightly silty fine sand (SP -
SM) which was underlain by buried organics and domestic trash (paper, glass, wood, plastic) which
extended to the boring termination depth of 4 to 4.5 feet. The hand auger borings were terminated in
impenetrable debris.
The groundwater level was encountered at the boring locations and recorded, at the time of drilling,
at a depth of 2.0 -feet below the existing ground surface. These levels are at or near seasonal high
groundwater levels. The groundwater level should be expected to fluctuate due to seasonal climatic
variations, surface water runoff patterns across the site, construction activity and the subsequent
development as planned, and other interrelated factors. Since groundwater variations are anticipated,
design drawings and specifications should accommodate such possibilities, and construction planning
should be based on the assumption that variations will occur.
4.0 EVALUATION & RECOMMENDATIONS
Our geotechnical engineering evaluation of the site and subsurface conditions with respect to the
planned construction and imposed structural loading conditions, and our recommendations for foundation
design/construction and site preparation, are based upon: (1) our site observations; (2) the field data
obtained during this geotechnical exploration of the site; and (3) our understanding of the project information
and structural loading conditions as presented in this report. The field test data has been compared with
similar soils at other sites where structures of similar magnitude are satisfactorily supported by shallow
foundations.
PROPOSED RESIDENCE -1219 JASMINE STREET October 20, 2021
Atlantic Beach, Florida Page 3
Based upon our findings, it is our opinion that the primary geotechnical condition which will affect
shallow foundation design and performance is the presence of buried organic debris and domestic trash
in the upper 12 feet of profile. A shallow foundation supported structure bearing on this type of material will
be subjected to potentially excessive total and differential settlement unless the organic/trash stratum is
over -excavated and replaced with compacted sand backfill. Otherwise, the residential structure would need
to be supported on a deep foundation system (helical pin piles) so that the structural loads are transferred
to competent bearing strata located below the debris zone.
Typically, over -excavation and replacement of debris is more cost effective than supporting a
structure on pilings. However, using the over -excavation approach at this site may not be feasible due to:
(1) depth of debris stratum (up to 12 feet below the ground surface), (2) high groundwater conditions (2 feet)
which would require the use of a vacuum well point system to control the groundwater level during
excavation and backfilling operations, and (3) the close proximity of existing residences which could
potentially be undermined and/or damage by the excavation activity.
We recommend that test pits be conducted at the site to: (1) better characterize to the type of debris
and (2) to better define the vertical and horizontal limits of the debris zone. If this supplemental testing
indicates that the debris zone is not as bad as anticipated, then the option of leaving the material in place
and using a shallow foundation could be re-evaluated. If the test pits confirm the initial findings and it is
determined that the material cannot be over -excavated and replaced, then deep foundation system design
recommendations would be provided.
5.0 CLOSURE
We appreciate the opportunity to be of service as the geotechnical consultant during this phase of
your project. Should you have any questions concerning this report or if we may be of any further service
to you, please feel free to contact us.
Digitally signed by
Billy C McMahan
Jr RE
Date: 2021.10.20
12:10:47 -04'00'
BCM/bcm/J20004 lot @ 1219 jasmine street.wpd
Attachments
Distribution: Addressee Via EMAIL ONLY
Very truly yours,
AGES of JAX, INC.
Bill C. McMahan, Jr., P.E.
Principal Engineer/ Vice -President
Registered, Florida No. 42677
ATTACHMENTS
Site Location Map
Field Exploration Plan
Generalized Subsurface Profile
Key to Soil Classification
Test Boring Records
Auger Boring Records
Field Exploration Procedures
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SITE LOCATION MAP
Lot 1219 @Jasmine Street
Atlantic Beach, Florida
DRAWN: DEP DATE: 09129/21 SCALE:
CHECKED: BCM JOB NO:J20004 NTS
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LEGEND:
* Penetration Test Boring Location (approximate)
* Auger Boring Location (approximate)
Tax Map provided by Beaches Habitat, undated.
17101910308
Existing House
Al B2
A2
A3
B1
Vacant Lot
17102000008
NOTES:
The boring locations were established by AGES personnel
using handheld GPS Locator Units. Boring locations as
shown on this plan are approximate.
17099000508
1710
AGES of JAX
9556 Historic Kin(
ksonville, Florida
17 r 111
FIELD EXPLORATION PLAN
Lot 1219 @ Jasmine Street
Atlantic Beach, Florida
DRAWN: DEP DATE: 09/29/21 SCALE:
CHECKED: BCM JOB NO:J20004 1"=30'
6
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LEGEND & SYMBOLS (USCS/AASHTO CLASSIFICATION
Fine SAND (SP/A-3)
Sandy SILT 4)
Slightly Silty Fine SAND (SP-SMIA-3)
(MHIMUA
AGES of JAX Inc.
Silty Fine SAND (SM/A-2-1)
Variably Cemented
Fine SAND (HARDPAN)
9556 Historic Kings Rd.
ovM rec Jacksonville, Florida 32257
®
Very Silty Fine SAND (SM/A-4)
®Silty Sand with Organics and Domestic Trash
GENERALIZED SUBSURFACE PROFILE
Standard Penetration
-.' s Resistance
EjClayey
Fine SAND (SCIA-2-6)
(blows/ft)
Lot 1219 @Jasmine Street
Silty Clayey Fine SAND (SC-SWA-2-5)
BT Boring Terminated
ABT Auger Boring Terminated
Atlantic Beach, Florida
ED
Very Clayey Fine SAND (SC/A-6)
GWLNE Groundwater Level
Silly CLAY (CUA -7-6)
Not Encountered
N Topsoil
DRAWN: DEP DATE: 09/29/21 SCALE:
®
CLAY (CUA -7-6)
0 Groundwater Level
at Time of Drilling
CHECKED: BCM JOB NO: J20004 1 "=5'
KEY TO SOIL CLASSIFICATION
CORRELATION OF N VALUE WITH RELATIVE DENSITY & CONSISTENCY
SANDS AND GRAVEL
NO. OF BLOWS,N"
RELATIVE
0-2
DENSITY
0-4
VERY LOOSE
5-10
LOOSE
11-20
FIRM
21-30
VERY FIRM
31-50
DENSE
OVER 50
VERY DENSE
SILTS AND CLAYS
NO. OF BLOWS, N*
I CONSISTENCY
0-2
VERY SOFT
3-4
SOFT
5-8
FIRM
9-15
STIFF
16-30
VERY STIFF
31-50
HARD
OVER 50
VERY HARD
PARTICLE SIZE IDENTIFICATION
UNIFIED SOIL CLASSIFICATION SYSTEM
CATEGORY
DIMENSIONS
CONSTITUENT
COMPONENTS (SHELL, GRAVEL,
5% to 12%
Slightly Silty, Slightly Clayey, Slightly Sandy
Gravel
Coarse - 0.75 to 3 inches in diameter
Sand
Coarse - 2.0 mm to 4.76 mm diameter
Medium - 0.42 mm to 2.0 mm diameter
Silt and Clay
Less than 0.074 mm (Invisible to the naked eye)
MODIFIERS
These modifiers provide our estimate of the amount of minor constituents (sand silt
or clay size particles) in the soil sample.
PERCENTAGE OF MINOR
MODIFIERS
CONSTITUENT
COMPONENTS (SHELL, GRAVEL,
5% to 12%
Slightly Silty, Slightly Clayey, Slightly Sandy
12% to 30%
Silty, Clayey, Sandy
30% to 50%
Very Silty, Very Clayey, Very Sandy
These modifiers provide our estimate of the amount of other components in the soil sample.
APPROXIMATE CONTENT OF OTHER
APPROXIMATE CONTENT OF
COMPONENTS (SHELL, GRAVEL,
MODIFIERS
ORGANIC COMPONENTS
ETC.)
0% to 5%
TRACE
I % to 2%
5% to 12%
FEW
2% to 4%
12% to 30%
SOME
4% to 8%
30% to 50%
MANY
>8%
wpdoc\Formisoil
TEST BORING RECORD
OF JA7I, NiC.
Project Lot 1219 @ Jasmine Street _
Boring Location (See Field Exploration Plan)
Ground Elevation NA Datum NA
Groundwater Depth 2.0' Time: DrillinclDate: 09/17/21
Lat/Lonq N 30.33330° / W 81.42313°
JOB NO J20004
BORING NO 131
Sheet 1 of 1
Boring Begun 09/17/21
Boring Completed 09/17/21
Driller AW, CB, & JM
Soil Ins ected B B. McMahan
ELEV.
FT
DEPTH
FT
MATERIAL DESCRIPTION
USCS CLASSIFICATION
SAMPLE
No.
BLOWS PER 6 -IN. INTERVAL
BLOW
COUNT
2 3 4 6
5 4 3 4
5 3 2 2
1 1 1 1
1 1 1
10 8 10
10 10 10
7
7
5
2
2
18
20
LOOSE Brown Slightly Silty Fine SAND (SP -SM)
LOOSE Dark Brown
Silty Fine SAND (SM)
1
2
3
4
5
6
7
5
LOOSE Brown Slightly Silty Fine SAND
w/ Trace Small Roots (SP -SM)
VERY LOOSE Dark Brown Very Silty Fine
SAND w/ Organics and Domestic Trash (PT)
VERY LOOSE Dark Brown
Very Silty Fine SAND w/ Many Organics (PT)
10
FIRM Light Grey Brown
Slightly Silty Fine SAND (SP -SM)
15
FIRM Dark Grey Brown
Slightly Silty Fine SAND (SP -SM)
BORING TERMINATED
20
25
30
REMARKS:
J20004 B1
BMW. & SAMPLING, ASTM O1b1JtJ0UUHL UHILLINIti. ASTM 0173
BLOW COUNT IS THE NUMBER OF BLOWS OF A 140 LB. HAMMER
FALLING 301N. REQUIRED TO DRIVE 1.4 IN. I.D. SAMPLER 1 FT.
TEST BORING RECORD
pFMx, IaC-
Project Lot 1219 A Jasmine Street
Boring Location (See Field Exploration Plan)
Ground Elevation NA Datum NA
Groundwater Depth 2.0' Time: Drilling Date: 09/17/21
1 of/l nnr: N in 'AAAA1* / W Al d7'4n'A'
JOB NO J20004
BORING NO B2
Sheet 1 of 1
Boring Begun 09/17/21
Boring Completed 09/17/21
Driller AW, CB,& JM
Snil InsnPrtPd Rv B_ McMahan
ELEV.
FT
DEPTH
FT)
MATERIAL DESCRIPTION
(USCS CLASSIFICATION
SAMPLE
NO.
STANDARD PENETRAT
ON TEST
BLOWS PER 6 -IN. INTERVAL
BLOW
COUNT
VERY LOOSE Dark Brown
Slightly Silty Fine SAND (SP -SM)
1
2
3
4
5
6
7
1 2 2 2
1 2 2 3
1 2 2 2
2 1 3 5
10 14 14
5 5 4
4 7 8
4
4
4
4
28
9
15
5
VERY LOOSE Brown Slightly
Silty Fine SAND (SP -SM)
VERY LOOSE Dark Brown Silty Fine SAND (SM)
VERY LOOSE Dark Brown Silty Fine SAND
w/ Organics and Domestic Trash (PT)
VERY FIRM Brown Slightly
Silty Fine SAND (SP -SM)
LOOSE Grey Slightly Silty Fine SAND (SP -SM)
10
15
FIRM Dark Grey Brown
Slightly Silty Fine SAND (SP -SM)
BORING TERMINATED
20
25
30
rtcnnnrcna:
J20004 B2
DUMMY V p U 1 n,, I NI uc Ia
BLOW COUNT IS THE NUMBER OF BLOWS OF A 140 LB. HAMMER
FALLING 30 IN. REQUIRED TO DRIVE 1.4 IN. I.D. SAMPLER 1 FT
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OFJAY, INC.
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Auger ID Depth (Feet)$
Lat/Long
AUGER BORING RECORDS
Lot 1219 @ Jasmine Street
Atlantic Beach, Florida
AGES Job No. J20004; Report No. 001
verrormea tsv: J. marami
SOIL DESCRIPTION (USCS CLASSIFICATION)
Al
0.0-1.0
Brown Slightly Silty Fine SAND w/ Trace Small Roots (SP -SM)
N 30.333370
1.0-3.5
Dark Brown Silty Fine SAND w/ Many Organics (PT)
W 81.423120
3.5 - 4.5*
Dark Grey Brown Silty Fine SAND w/ Organics and Domestic Trash (PT)
A. B.T."-
GWL`= 2.0'
A2
0.0-0.5
Dark Brown Silty Fine SAND w/ Many Roots (PT)
N 30.33335°
0.5-2.5
Brown Slightly Silty Fine SAND w/ Many Organics (PT)
W 81.42307°
2.5 - 4.0*
Dark Brown Silty Fine SAND w/ Many Organics and Trash (PT)
A.B.T."
GWL`= 2.0'
A2
0.0-1.0
Grey Brown Fine SAND w/ Some Small Roots (SP)
N 30.333310
1.0-3.5
Dark Brown Slightly Silty Fine SAND (SP -SM)
W 81.423000
3.5 - 4.5*
Dark Brown Silty Fine SAND w/ Trash (PT)
.BT'
GWL`=2.0'
* Borings Terminated due to trash and roots.
a - Depth measured below ground surface existing at boring location at time of drilling
b - Auger Boring Terminated (A.B.T.)
c - Groundwater Level (GWL) depth below existing ground surface, recorded at time of drilling, unless otherwise noted
J20004 aug 1.wpd
FIELD EXPLORATION PROCEDURES
Penetration Borings
The penetration borings were made in general accordance with ASTM D 1586-67, "Penetration
Test and Split -Barrel Sampling of Soils". The boring was advanced to the water table by augering and,
after encountering the groundwater table, further advanced by a wash -and -chop drilling technique
using a circulating bentonite fluid for borehole flushing and stability. At two -foot intervals within the
upper 10 feet and at five-foot intervals thereafter, the drilling tools were removed from the borehole and
a split -barrel sampler inserted to the borehole bottom and driven 18 inches into the material using a
140 -pound SPT hammer falling, on the average, 30 inches per hammer blow. The number of hammer
blows for the final 12 inches of penetration is termed the 'penetration resistance, blow count, or N -
value . This value is an index to several in-place geotechnical properties of the material tested, such
as relative density and Young's Modulus.
After driving the sampler 18 inches (or less, if in hard rock or rock -like material) at each test
interval, the samplerwas retrieved from the borehole and a representative sample of the material within
the split -barrel was placed in a glass jar and sealed. After completing the drilling operations, the
samples for the boring were transported to our laboratory where they were examined by our engineer
in order to verify the driller's field classifications. The samples will be kept in our laboratory for a period
of two months after submittal of formal written report, unless otherwise directed by the client.
Auger Borings
The auger borings were drilled in general accordance with ASTM D 1452-80 "Soil Investigation
and Sampling by Auger Borings"). Representative samples of the soils brought to t e ground surface
by the augering process were placed in glass 'ars, sealed, and transported to our laboratory where they
were examined by a geotechnical engineer to verify the driller's field classification.