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"FRNATO"'
Tarpon Flats, LLC
277 Royal Poinciana Way, Suite 156
Palm Beach, Florida 33480
RE: Soil Exploration - Proposed Tarpon Flats Site Wall
Vicinity SW of Bonita Isle Dr. & A1A, St. Lucie County, FL
GFA Project # 13-2092.03
GFA International performed soil testing with three auger borings with hand cone penetrometers at
the above referenced project. Based on the test results, the soil on which the referenced structure is
to rest is capable of sustaining a safe bearing capacity of 2,500 psf. The subsurface exploration
activities were performed in accordance with Chapter 18 ,of the Florida Building Code (latest addition)
and applicable ASTM standards. For detailed information on subsurface conditions encountered,
please refer to the logs attached to this letter.
We recommend that the bottom of the footings be founded at a depth of at least 12 inches below
finish grade. The depth shall be measured from the lowest adjacent grade. We also recommend a
minimum footing width of 18 inches for spread footings and 16 inches for monolithic footings, but not
less than 8 inches more than the width of the imposed wall.
This report does not state or imply that the foundation soils at the bearing level will remain in the
original condition in which they were found during the subsurface exploration activities. Exposure to
the environment may weaken the,foundation soils at the bearing level if the foundation excavations
remain open for a long period of time, or if the foundation soils are exposed to rainfall. Consequently,
it is recommended that the excavations for the wall and column footings be performed to final grade
and footings constructed -as soon as possible to minimize potential damage of the bearing soils. GFA
estimates that 0 — 1 foot of fill will be required to bring the foundation pad to design grade. It is also
recommended that the 2 feet below existing grade, the bottom of all new footing excavations and
slabs, and all fill material, be compacted to a minimum density of 95% of the Modified Proctor (ASTM
D-1557), prior to the placement of the concrete for the footings. Foundations and any below grade
remains of any structures that are within the footprint of the new construction should be removed so
as to not affect structures. Analysis of the foundation performance under hurricane conditions or other
storm events, including the effects of loss of soil support due to scour or other forces, is not within the
scope of this report, and the recommendations are valid only for normal conditions.
Sincerely,
GFA
FB,F�'�6J�,� a •. yp '�,
yS90,
aid W. Mo'r,' P -`' Craig A. Hampy, E.I.
��ilt3r Geotec,�ca�r Staff Engineer
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Zp&ft elation Plan, Auger Boring (AB) Logs (3), Notes Related to Test Borings
Copies: " 11111oq
521 NW Enterprise Drive • Port St. Lucie, Florida 34986 • (772) 924.3575 • (772) 924.3580 (fax) • www.teamgfa.com
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Test Location Plan
Proposed Tarpon Flats Site Wall
Vicinity SW of Bonita Isle Dr. & Al
St. Lucie County, Florida
GFA Project No. 13-2092.03
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I AUGER BORING LOGS WITH HAND CONE PENETROMETER (HCP) TESTS I
Client: Tarpon Flats, LLC
Project: Proposed Tarpon Flats Site Wall
Vicinity SW of Bonita Isle Dr. & A1A
St. Lucie County, Florida
Elevation: Existing Grade
Project No:
Lab No:
Test Date:
Technician:
13-2092.03
10/13/2014
PM/W N
TEST LOCATION: AB —1 N27.50534° W80.30530°
HCP
Depth (feet)
Description (color, texture, consistency, remarks)
Depth
Reading
0-2
Brown fine sand SP
1
60
2-5
Light brown fine sand SP
2
80+
5-10
Brown fine sand, little shell SP
3
80+
4
60
5
30
6
30
7
80+
8
80+
9
80+
10
80+
Water table at 4% feet below ground surface
TEST LOCATION: AB - 2 N27.50549° W80.30532°
HCP
Depth (feet)
Description (color, texture, consistency, remarks)
Depth
Reading
0 —1%
Brown fine sand SP
1
50
1%Z — 3
Light brown fine sand SP
2
80+
3-7
Brown fine sand, little shell SP
3
80+
7-8
Gray fine sand, trace shell SP
4
1 80+
8-10
Gray fine sand, some shell SP
5
80+
6
80+
7
60
8
80+
9
80+
10
80+
Water table at 4'/ feet below ground surface
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AUGER BORING LOGS WITH HAND CONE PENETROMETER (HCP) TESTS
Client: Tarpon Flats, LLC Project No: 13-2092.03
Project: Proposed Tarpon Flats Site Wall Lab No:
Vicinity SW of Bonita Isle Dr. & A1A Test Date: 10/13/2014
St. Lucie County, Florida
Elevation: Existing Grade Technician: PM/WN
TEST LOCATION: AB — 3 N27.50526° W80.30527°
HCP
Depth (feet)
Description (color, texture, consistency, remarks)
Depth
Reading
0-2
Brown fine sand SP
1
80+
2-7
Brown fine sand, little shell SP
2
80+
7 —10
Gray fine sand, little shell SP
3
80+
4
70
5
80+
6
30
7
50
8
50
9
80+
10
80+
Water table at 4% feet below ground surface