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HomeMy WebLinkAboutTR20-7965A Prelim Subsoil Rept - DS Geotechnical Report #20-7965A
PRELIMINARY SUBSOIL REPORT
ASSET NAME: WILSON RESIDENCE
LOCATION- 4911 BALD CYPRESS TRAIL
FORT PIERCE, FLORIDA 34951
SAINT LUCIE COUNTY
CLIENT: HELICON FOUNDATION REPAIR SYSTEMS, INC.
JAY SILVER
11103 N 46T" ST, BLDG B
TAMPA, FL 33613
TEL: (813) 567-1065 / FAX: (813) 864-4461
May 14, 2020
AWARD
ENGINEERING, INC.
7804 N. FLORIDA AVENUE, TAMPA, FLORIDA 33604
Phone- (813) 238-4393; Fax- (813) 237-3909; E-mail- awardengineering@yahoo.com
Website: http-//www.awardengineering.com
AWARD
ENGINEERING, INC.
7804 N. PLORIDIA AVENUE, TIAMPA, FLORIIDA 33604
Phone: (813) 238-4393; Fax: (813) 237-3909; E-mail: awardengineering@yahoo.com
Website: http:/)www.awardengineering.com
HELICON ROUNDATION REPAIR SYSTEMS, INC. May 14, 2020
Jay Silver
11103 N 461h St, Bldg B
Nampa, FL 33613
Tel: (813) 567-1065
Flax: (813) 664-4461
RIB: Technical Report #20-7965A: PRELIMINARY SUBSOIL REPORT:
Wilson Residence
4911 Bald Cypress Trail
Fort Pierce, FL 34951 (Saint Lucie County)
(Parcel: 1418-132-0040-000-4)
Dean Sir/Madam:
Per your request, AWARD Engineering, Inc. (AWARD] has completed this Preliminary Subsoil
Report for the above-mentioned subject property. The scope of this investigation is limited to the
structure located on the subject property. This report contains the results of oun investigation
and provides comments and findings.
This report has been prepared for the exclusive use of our client for their use in evaluating the
subject property and to assist in the design of a remedialion plan, if necessary. Prior to release
of this report for a third party use, a written permission from AWARD is required.
AWARD Engineering, Inc. (AWARD) appreciates this opportunity 10 be of service. We are
available io answer any questions that may anise from this report and to provide any additional
services that may be needed.
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AWARD Sngineening, Inc.
T.R. #20-7965A
TABLE OF CONTENTS
SECTION PAGE
1.0 INTRODUCTION .............................................................................................................1
2.0 SCOPE OF WORK ..........................................................................................................1
3.0 RESEARCH OF AVAILABLE PUBLIC DOCUMENTS...............................................2
4.0 FIELD INVESTIGATION ..................................................................................................9
5.0 CONCLUSIONS AND RECOMMENDATIONS..............................................................11
6.0 LIMITATIONS AND GENERAL QUALIFICATIONS.......................................................11
Appendix "A". Plate #1: Street Location Map
Plate #2: Site Layout & Testing Locations Map
Plate #3: Aerial Photographic Map(s)
Plate #4: N.R.C.S. Soil Survey Map
Plate #5: U.S.G.S. Quad Topographic Map
Plate #6: Wetlands Inventory Map
Plate #7: Test Pit Excavation Detail(s)
Plates #8 to #10- Boring Logs HA-1 to HA-3
Appendix "B". Site Photographs
Appendix "C". Specifications of Remediation Techniques
AWARD Engineering, Inc.
T.R. #20-7965A
1.0 INTRODUCTION
Site Information
Owner(s): EDWIN C WILSON
SARA A WILSON
4911 BALD CYPRESS TRAIL
FORT PIERCE, FL 34951
Asset Name(s): WILSON RESIDENCE
Asset Location(s): 4911 BALD CYPRESS TRAIL
FORT PIERCE, FL 34951
SAINT LUCIE COUNTY
Parcel ID: 1418-132-0040-000-4
Account #: 7893
Property Use: 0100 — Single Family Residence
Year Built: 2006
Legal Description: 18 34 40 S 1/2 OF SE 1/4 OF NW 1/4 OF SW 1/4 OF NE 1/4-LESS
E 30 FT- (1.16 AC) (OR 2210-1051)
Inspection Date(s): April 9, 2020
Asset Description: The subject property is a one-story concrete block single-family
residence located on the west side of Bald Cypress Trail in Fort
Pierce, Florida. A Street Location Map, a Site Layout and Testing
Locations Map, and Aerial Photographic Map(s) are enclosed as
Plates #1, #2, and #3 in Appendix "A" of this report.
2.0 SCOPE OF WORK
The purpose of the study is to investigate the subsoil conditions encountered at the subject site
to assess any ground settling issues. To accomplish this, the scope of our study included the
following:
TASK I: RESEARCH OF AVAILABLE PUBLIC DOCUMENTS FROM VARIOUS
GOVERNMENT AGENCIES
AWARD Engineering, Inc. reviewed available public documents published by various
government agencies to obtain a historical reference and to document the general
characteristics of the property.
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T.R. #20-7965A
TASK II: FIELD INVESTIGATION
1- Visual Site Inspection - A general reconnaissance of the site was conducted on the
subject property in order to document any problems.
2- Hand Auger Soil Borings - Determined subsurface soil conditions and ground water, if
encountered, by means of three (3) hand auger soil borings at selected locations around
the structure. AWARD obtained standard samples of the soils and inspected the
representative samples to assess pertinent engineering characteristics.
3- Test Pit Excavation - Performed two (2) test pit excavations to determine the condition of
the foundation of the structure.
TASK III: REPORT PREPARATION:
AWARD Engineering, Inc. prepared this report under the supervision of a Florida Licensed
Professional Engineer. The report summarizes our opinions and evaluations regarding the
previously stated objectives and presents the field data upon which our conclusion is based.
3.0 RESEARCH OF AVAILABLE PUBLIC DOCUMENTS
General Soil Characteristics
Per the USDA National Resources Conservation Service, Saint Lucie County Soils Survey, (See
Plate #4 in Appendix "A" of this report), the western and eastern sections of the subject property
are in Soil Symbol #21 — Lawnwood and Myakka Sands, and the central section of the subject
property is in Soil Symbol #51 — Waveland-Lawnwood Complex, Depressional, with the
following soil characteristics:
21—Lawnwood and Myakka Sands
Map Unit Composition
Lawnwood and similar soils: 40 percent
Myakka and similar soils: 40 percent
Minor components: 20 percent
Estimates are based on observations, descriptions, and transects of the map unit.
Description of Lawnwood
Setting
Landform: Marine terraces on flatwoods
Landform position (three-dimensional): Talf
Down-slope shape: Linear
Across-slope shape: Linear
Parent material: Sandy marine deposits
Typical profile
A - 0 to 8 inches: sand
E - 8 to 28 inches: sand
Bh1 - 28 to 52 inches: sand
Bh2 - 52 to 58 inches: sand
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T.R. #20-7965A
C - 58 to 80 inches: sand
Properties and qualities
Slope: 0 to 2 percent
Depth to restrictive feature: 10 to 31 inches to ortstein
Natural drainage class: Poorly drained
Runoff class: High
Capacity of the most limiting layer to transmit water (Ksat): Moderately low to
moderately high (0.06 to 0.20 in/hr)
Depth to water table: About 6 to 18 inches
Frequency of flooding: None
Frequency of ponding: None
Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0
mmhos/cm)
Sodium adsorption ratio, maximum in profile: 4.0
Available water storage in profile: Very low (about 0.9 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 4w
Hydrologic Soil Group: A/D
Forage suitability group: Sandy soils on flats of mesic or hydric lowlands
(G156BC141 FL)
Hydric soil rating: No
Description of Myakka
Setting
Landform: Flatwoods on marine terraces
Landform position (three-dimensional): Talf
Down-slope shape: Convex
Across-slope shape: Linear
Parent material: Sandy marine deposits
Typical profile
A - 0 to 7 inches: sand
E - 7 to 27 inches: sand
Bh - 27 to 38 inches: sand
C - 38 to 80 inches: sand
Properties and qualities
Slope: 0 to 2 percent
Depth to restrictive feature: More than 80 inches
Natural drainage class: Poorly drained
Runoff class: High
Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high
(0.57 to 5.95 in/hr)
Depth to water table: About 6 to 18 inches
Frequency of flooding: None
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T.R. #20-7965A
Frequency of ponding: None
Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0
mmhos/cm)
Sodium adsorption ratio, maximum in profile: 4.0
Available water storage in profile: Low (about 4.5 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 4w
Hydrologic Soil Group: A/D
Forage suitability group: Sandy soils on flats of mesic or hydric lowlands
(G156BC141 FL)
Hydric soil rating: No
Minor Components
Ankona
Electra
Waveland
51—Waveland-Lawnwood Complex, Depressional
Map Unit Composition
Waveland and similar soils: 55 percent
Lawnwood and similar soils: 40 percent
Minor components: 5 percent
Estimates are based on observations, descriptions, and transects of the map unit.
Description of Waveland
Setting
Landform: Depressions on marine terraces
Landform position (three-dimensional): Dip
Down-slope shape: Concave
Across-slope shape: Concave
Parent material: Sandy marine deposits
Typical profile
A - 0 to 4 inches: fine sand
Eg - 4 to 32 inches: sand
Bh1 - 32 to 40 inches: loamy sand
Bh2 - 40 to 53 inches: sand
Cg 1 - 53 to 66 inches: sand
Cg2 - 66 to 80 inches: sand
Properties and qualities
Slope: 0 to 2 percent
Depth to restrictive feature: 31 to 50 inches to ortstein
Natural drainage class: Very poorly drained
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Runoff class: Negligible
Capacity of the most limiting layer to transmit water (Ksat): Moderately low to
moderately high (0.06 to 0.20 in/hr)
Depth to water table: About 0 inches
Frequency of flooding: None
Frequency of ponding: Frequent
Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0
mmhos/cm)
Sodium adsorption ratio, maximum in profile: 4.0
Available water storage in profile: Very low (about 0.8 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 7w
Hydrologic Soil Group: C/D
Forage suitability group: Sandy soils on stream terraces, flood plains, or in
depressions (G156BC145FL)
Hydric soil rating: Yes
Description of Lawnwood
Setting
Landform: Depressions on marine terraces
Landform position (three-dimensional): Dip
Down-slope shape: Concave
Across-slope shape: Concave
Parent material: Sandy marine deposits
Typical profile
A - 0 to 3 inches: sand
E - 3 to 28 inches: sand
Bh1 - 28 to 52 inches: sand
Bh2 - 52 to 58 inches: sand
C - 58 to 80 inches: sand
Properties and qualities
Slope: 0 to 2 percent
Depth to restrictive feature: 10 to 31 inches to ortstein
Natural drainage class: Very poorly drained
Runoff class: Negligible
Capacity of the most limiting layer to transmit water (Ksat): Moderately low to
moderately high (0.06 to 0.20 in/hr)
Depth to water table: About 0 inches
Frequency of flooding: None
Frequency of ponding: Frequent
Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0
mmhos/cm)
Sodium adsorption ratio, maximum in profile: 4.0
Available water storage in profile: Very low (about 0.7 inches)
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Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 7w
Hydrologic Soil Group: A/D
Forage suitability group: Sandy soils on stream terraces, flood plains, or in
depressions (G156BC145FL)
Hydric soil rating: Yes
Minor Components
Wabasso
Topography
Per the 2018 INDRIO, FLORIDA, U.S.G.S. Quadrangle Map, the subject property is located at
an elevation of 19 +/- feet above mean sea level with no significant downgradients. (See Plate
#5 in Appendix "A" of this report)
Wetland Classification
The National Wetlands Inventory Map (See Plate #6 in Appendix "A" of this report) indicates that
the subject property has a riverine area located along the southern boundary with a wetland
classification of RSUBFx. The descriptions are as follows:
RSUBFx: RIVERINE, UNKNOWN PERENNIAL, UNCONSOLIDATED BOTTOM,
Semipermanently Flooded, Excavated
Geomorphic/Geologic Setting
Geology
Anastasia Formation (Pleistocene) at the surface, covers 56 % of this area.
The Atlantic Coastal Ridge is underlain by the Anastasia Formation from St. Johns
County southward to Palm Beach County. Excellent exposures occur in Flagler County in
Washington Oaks State Park, in Martin County at the House of Refuge on Hutchinson
Island and at Blowing Rocks in Palm Beach County. An impressive exposure of
Anastasia Formation sediments occurs along Country Club Road in Palm Beach County
(Lovejoy, 1992). The Anastasia Formation generally is recognized near the coast but
extends inland as much as 20 miles (32 kilometers) in St. Lucie and Martin Counties. The
Anastasia Formation, named by Sellards (1912), is composed of interbedded sands and
coquinoid limestones. The most recognized facies of the Anastasia sediments is an
orangish brown, unindurated to moderately indurated, coquina of whole and fragmented
mollusk shells in a matrix of sand often cemented by sparry calcite. Sands occur as light
gray to tan and orangish brown, unconsolidated to moderately indurated, unfossiliferous
to very fossiliferous beds. The Anastasia Formation forms part of the surficial aquifer
system.
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T.R. #20-7965A
Shelly sediments of Plio-Pleistocene age (Pliocene/Pleistocene) at surface, covers 34
of this area.
Tertiary-Quaternary Fossiliferous Sediments of Southern Florida - Molluskbearing
sediments of southern Florida contain some of the most abundant and diverse fossil
faunas in the world. The origin of these accumulations of fossil mollusks is imprecisely
known (Allmon, 1992). The shell beds have attracted much attention due to the
abundance and preservation of the fossils but the biostratigraphy and lithostratigraphy of
the units has not been well defined (Scott, 1992). Scott and Wingard (1995) discussed
the problems associated with biostratigraphy and lithostratigraphy of the Plio-Pleistocene
in southern Florida. These "formations" are biostratigraphic units. The "formations"
previously recognized within the latest Tertiary-Quaternary section of southern Florida
include the latest Pliocene - early Pleistocene Caloosahatchee Formation, the early
Pleistocene Bermont formation (informal) and the late Pleistocene Fort Thompson
Formation. This section consists of fossiliferous sands and carbonates. The identification
of these units is problematic unless the significant molluscan species are recognized.
Often exposures are not extensive enough to facilitate the collection of representative
faunal samples to properly discern the biostratigraphic identification of the formation. In
an attempt to alleviate the inherent problems in the biostratigraphic recognition of
lithostratigraphic units, Scott (1992) suggested grouping the latest Pliocene through late
Pleistocene Caloosahatchee, Bermont and Fort Thompson Formations in to a single
lithostratigraphic entity, the Okeechobee formation (informal). In mapping the shelly
sands and carbonates, a generalized grouping as Tertiary-Quaternary shell units (TQsu)
was utilized. This is equivalent to the informal Okeechobee formation. The distribution of
the Caloosahatchee and Fort Thompson Formation are shown on previous geologic
maps by Cooke (1945), Vernon and Puri (1964) and Brooks (1982). The Nashua
Formation occurs within the Pliocene - Pleistocene in northern Florida. However, it crops
out or is near the surface is an area too small to be shown on a map of this scale.
Lithologically these sediments are complex, varying from unconsolidated, variably
calcareous and fossiliferous quartz sands to well indurated, sandy, fossiliferous
limestones (both marine and freshwater). Clayey sands and sandy clays are present.
These sediments form part of the surficial aquifer system
Beach ridge and dune (Pleistocene/Holocene) at the surface, covers 7 % of this area.
Undifferentiated Quaternary Sediments - Much of Florida's surface is covered by a
varying thickness of undifferentiated sediments consisting of siliciclastics, organics and
freshwater carbonates. Where these sediments exceed 20 feet (6.1 meters) thick, they
were mapped as discrete units. In an effort to subdivide the undifferentiated sediments,
those sediments occurring in flood plains were mapped as alluvial and flood plain
deposits (Qal). Sediments showing surficial expression of beach ridges and dunes were
mapped separately (Qbd) as were the sediments composing Trail Ridge (Qtr). Terrace
sands were not mapped (refer to Healy [1975] for a discussion of the terraces in Florida).
The subdivisions of the Undifferentiated Quaternary Sediments (Qu) are not
lithostratigraphic units but are utilized in order to facilitate a better understanding of the
State's geology. The siliciclastics are light gray, tan, brown to black, unconsolidated to
poorly consolidated, clean to clayey, silty, unfossiliferous, variably organic-bearing sands
to blue green to olive green, poorly to moderately consolidated, sandy, silty clays. Gravel
is occasionally present in the panhandle. Organics occur as plant debris, roots,
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T.R. #20-7965A
disseminated organic matrix and beds of peat. Freshwater carbonates, often referred to
as marls in the literature, are scattered over much of the State. In southern Florida,
freshwater carbonates are nearly ubiquitous in the Everglades. These sediments are buff
colored to tan, unconsolidated to poorly consolidated, fossiliferous carbonate muds.
Sand, silt and clay may be present in limited quantities. These carbonates often contain
organics. The dominant fossils in the freshwater carbonates are mollusks.
Holocene sediments (Holocene) at the surface, covers 3 % of this area.
The Holocene sediments in Florida occur near the present coastline at elevations
generally less than 5 feet (1.5 meters). The sediments include quartz sands, carbonate
sands and muds, and organics.
Undifferentiated Quaternary Sediments
Undifferentiated Quaternary Sediments - Much of Florida's surface is covered by a
varying thickness of undifferentiated sediments consisting of siliciclastics, organics and
freshwater carbonates. Where these sediments exceed 20 feet (6.1 meters) thick, they
were mapped as discrete units. In an effort to subdivide the undifferentiated sediments,
those sediments occurring in flood plains were mapped as alluvial and flood plain
deposits (Qal). Sediments showing surficial expression of beach ridges and dunes were
mapped separately (Qbd) as were the sediments composing Trail Ridge (Qtr). Terrace
sands were not mapped (refer to Healy [1975] for a discussion of the terraces in Florida).
The subdivisions of the Undifferentiated Quaternary Sediments (Qu) are not
lithostratigraphic units but are utilized in order to facilitate a better understanding of the
State's geology. The siliciclastics are light gray, tan, brown to black, unconsolidated to
poorly consolidated, clean to clayey, silty, unfossiliferous, variably organic-bearing sands
to blue green to olive green, poorly to moderately consolidated, sandy, silty clays. Gravel
is occasionally present in the panhandle. Organics occur as plant debris, roots,
disseminated organic matrix and beds of peat. Freshwater carbonates, often referred to
as marls in the literature, are scattered over much of the State. In southern Florida,
freshwater carbonates are nearly ubiquitous in the Everglades. These sediments are buff
colored to tan, unconsolidated to poorly consolidated, fossiliferous carbonate muds.
Sand, silt and clay may be present in limited quantities. These carbonates often contain
organics. The dominant fossils in the freshwater carbonates are mollusks.
Hydrology
Saint Lucie County lies between the Atlantic Ocean to the east, Okeechobee County to
the west, and Martin County to the south. Five major drainage basins are in the county,
namely C-23, C-24, C-25, C-59 and the North Fork of the Saint Lucie River Basin,
covering a total of 453.6 square miles). The North Fork of the Saint Lucie River Basin
(180.7 square miles) covers about 40 percent of the total drainage-basin area. Fifty-three
percent (263.5 square miles) of the C-23, C-24 and C-25 drainage basins lie in Saint
Lucie County. Six major water control structures are in the county, namely S-50 (fixed
crest weir), S-99 (gated spillway), S-49 (gated spillway), G-78 (gated culvert), G-79
(culvert) and G-81 (steel sheet pile dam with gated weir). Structures S-48 (fixed crest
weir) and S97 (gated spillway) although located on the C-23 canal, which lies in the
boundary with Martin County, belong to Martin County. The coastal structures S-49, S-50
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T.R. #20-7965A
and S-48 (for Martin County) are the most important and are designed to prevent
saltwater intrusion to local groundwater by maintaining upstream water surface elevations
to specified design levels. Also 5-49, a gated spillway, controls discharge from C-24 to
tidewater. The other structures work as dividers between basins and control flood waters
from one basin to another.
4.0 FIELD INVESTIGATION
The field investigation for this property included an Exterior Visual Inspection of the subject
property, two (2) test pit excavations, and three (3) hand auger soil borings. Below is a summary
of the results.
VISUAL INSPECTION
On April 9, 2020, AWARD Engineering, Inc. performed an Exterior Visual Inspection of the
property, with the following comments (See Site Photographs in Appendix "B" of this report):
• The subject property contains a one-story concrete block single-family residence with
stucco finish. There is a screened-in patio area attached to the rear of the structure.
• The ground supporting structure appears to have been built up prior to construction as
there are notable down gradients away from the residence in both of the side yards and
the back yard.
• There are vertical, horizontal, and stair-step hairline wall cracks at various locations on
the exterior walls of the structure, many of which have been patched.
TEST PIT EXCAVATION(S)
On April 9, 2020, two (2) Test Pit Excavations were performed to assess the foundation of the
structure. The locations of the test pits are shown on Plate #2 of Appendix "A" of this report.
Test Pit TP-1, as depicted on Plate #7 of Appendix "A" of this report, shows that the foundation
at this location is embedded approximately eight (8) inches below the ground surface.
Test Pit TP-2, as depicted on Plate #7 of Appendix "A" of this report, shows that the foundation
at this location is embedded approximately nine (9) inches below the ground surface.
For reference, the current Florida Building Code requires foundations to be embedded a
minimum of 12 inches below grade.
HAND AUGER SOIL BORINGS
On April 9, 2020, three (3) Hand Auger Soil Borings were performed at the site. Plate #2 in
Appendix "A" of this report indicates the layout of hand auger soil borings.
Hand auger boring HA-1 showed fine sand at the surface, followed by fine sand with organic soil
at 2 feet bls, followed by fine sand at 5 feet, followed by fine sand with organic soil at 7 feet,
where the boring was terminated. The water table was not encountered down to 7 feet bls.
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Hand auger boring HA-2 showed organic soil with roots at the surface, followed by fine sand at
2 feet bls, followed by fine sand with organic soil at 3 feet, followed by fine sand at 5 feet down
to 7 feet, where the boring was terminated. The water table was not encountered down to 7 feet
bls.
Hand auger boring HA-3 showed fine sand at the surface, followed by fine sand with organic soil
at 2 feet bls, followed by fine sand at 3 feet, followed by organic soil at 4 feet, followed by fine
sand at 5 feet down to 7 feet, where the boring was terminated. The water table was not
encountered down to 7 feet bls.
The profiles showing the nature of the subsurface soils, the consistency, type of soil and
thickness of strata has been illustrated in the individual boring logs, Plates #8 to #10 in
Appendix "A" of this report.
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5.0 CONCLUSIONS AND RECOMMENDATIONS
At the time of inspection, there was no evidence of catastrophic ground collapse, abnormal
ground depressions, or unsafe structural conditions. Therefore, it is our opinion that a full
geotechnical and/or sinkhole investigation is not warranted at this time.
Based on the observations made, data obtained as results of the field activities at the subject
property, and a review of the available records regarding the WILSON RESIDENCE located at
4911 BALD CYPRESS TRAIL in FORT PIERCE, FLORIDA during this Preliminary Subsoil
Survey, it is our opinion that the observed damages to the structure are due to a combination of
factors, including thermal expansion/contraction of the building materials, insufficient foundation
embedment, and differential settlement as a result of decaying organic soils and settlement of
the built up soils. It should be noted that prior to construction of the residence, the property was
heavily wooded and possibly swampy.
It is AWARD's opinion that the installation of an underpinning system, which the homeowner has
requested, will assist in stabilizing the foundation of the structure and reduce the possibility of
future movement. The underpinning system consists of installing pressure piers around the
perimeter of the structure to transfer the load onto more competent soils/limestone.
At the time of repair, AWARD Engineering, Inc. can provide to the selected Contractor a set of
plans and report copies required for permitting, perform monitoring to the installation process,
and provide a Completion Report for recording and closing the permit.
Please refer to Appendix "C" for a discussion of the specifications of the underpinning
technique.
All cosmetic repairs should be repaired at a minimum of 30 days after underpinning.
If a higher order of confidence is required, or if any additional movements are observed at the
structure after installing the underpinning system, AWARD recommends a complete
geotechnical investigation, including, but not limited to, the performance of a Ground
Penetrating Radar (GPR) Survey and Standard Penetration Tests (SPTs) to determine the
presence or absence of soil movement or sinkhole activity at this site.
6.0 LIMITATIONS AND GENERAL QUALIFICATIONS
This report was prepared under the direction and supervision of a Professional Engineer
Licensed in the State of Florida.
This report has been prepared based on our client's request to assess the subsoil conditions
supporting the structure. The scope is limited to the specific project and location described.
The agreed upon limited scope of work did not include, nor was intended to include, an
investigation of sinkhole conditions that might exist at the site, nor is our recommendation for an
underpinning system meant to be a replacement for any compaction grouting program that
might be recommended by others.
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The analysis and recommendations submitted in this report are based upon the data obtained
from the discussed activities in this report and performed at the locations indicated on the
location diagram and from any other information discussed in the report.
While due cane has been exercised in the performance of the measurements and their
interpretations, described Herein, AWARD can make no representations, warranties, on
guarantees with respect to latent on concealed conditions, which may exist and that may be
beyond the limits of detection with the methods used. No liability can be accepted by AWARD
nor shall AWARD accept, in any way, responsibility for defects of any kind arising from a cause
that is beyond AWIARD's immediate control or knowledge, or for any fault in the jlunction of our
work with subsequent world carried cut by others.
No single technique or combination of techniques can detect and delineate all sites. Therefore,
a prudent geologist or engineer will use a multi-disciplinary program consisting of a variety of
appropriate investigation methods to characterize conditions on the site. After tests are
performed, conditions may change as a result of subsurface kanst erosion, weathering, and)on
absorption on loss of moisture. Field measurements are positioned by field methods that are
generally accepted in geologic practices and should not be considered to be accurate to that of
a land surveyor.
The report does not reflect any variation that may occur between these borings. In the
performance of testing, specific information is obtained at specific times. However, it is a well-
known fact that variations in the soil and rock conditions exist on most sites between boring
locations, as well as variations in ground water levels, from time to time. The nature and extent
of variations may not become evident until a later time.
We appreciate the opportunity to serve as your consultants for the project at 4911 BALD
CYPRBSS TRAIL) in FORT PIERCE, FLORIDA. If you have any questions, please feel free to
call us.
Sincerely,yow'
AWA ZNG1NEFR� h
Hovfa", S�S t�iou;ho�jen P"E.
Pnof6rP bginee' 430
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AWIARD Engineering, Inc. Rage 12
T.R. #20-7965A
APPENDIX "A"
Plate #1 : Street Location Map
Plate #2: Site Layout & Testing Locations Map
Plate #3: Aerial Photographic Map(s)
Plate #4: N.R.C.S. Soil Survey Map
Plate #5: U.S.G.S. Quad Topographic Map
Plate #6: Wetland Inventory Map
Plate #7: Test Pit Excavation Detail(s)
Plates #8 to #10: Boring Logs HA-1 to HA-3
AWARD Engineering, Inc.
PLATE#1
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DRAWN BY: H.M.
AWARD STREET LOCATION MAP CHECKED BY: H.M.
ENGINEERING, INC 4911 BALD CYPRESS TRAIL PROJ.NO: 20-7965A
FORT PIERCE, FL 34951 DATE: 04-15-2020
--Down Gradient PLATE#2
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®
TP-1
GARAGE
PHA-1
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LEGEND
0 HAND AUGER LOCATION AND NUMBER
Z TEST PIT LOCATION AND NUMBER
VISIBLE CRACK
1IN = 15FT
SITE LAYOUT & TESTING DRAWN BY: H.M.
AWARD LOCATIONS MAP CHECKED BY: H.M.
ENGINEERING, INC 4911 BALD CYPRESS TRAIL PROJ.NO: 20-7965A
FORT PIERCE, FL 34951 DATE: 05-13-2020
PLATE#3
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AERIAL PHOTOGRAPHIC MAP DRAWN BY: H.M.
AWARD 2018 CHECKED BY: H.M.
ENGINEERING, INC 4911 BALD CYPRESS TRAIL PROJ.NO: 20-7965A
FORT PIERCE, FL 34951 DATE: 04-15-2020
PLATE#4
3 Soil Map—St.Lucie County,Florida 3
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27°31'23N
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///���111 Map pgection:Web Menztpr Gomero70Minates:WG584 Edge tics:U1M Zone 17N WG584
USDA Natural Resources Web Soil Survey 4/15/2020
Conservation Service National Cooperative Soil Survey Page 1 of 3
N
NOT TO SCALE
DRAWN BY: H.M.
AWARD N.R.C.S. SOIL SURVEY MAP CHECKED BY: H.M.
ENGINEERING, INC 4911 BALD CYPRESS TRAIL PROJ.NO: 20-7965A
FORT PIERCE, FL 34951 DATE: 04-15-2020
PLATE#S
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3 a Fn Pi—NW NORTH AMERICAN VERTICAL DATUM OF 1988
\ 5 Fort Pie.Tre
d 5
INDRIO, FL
apmnvla QU0.PINIitLES 2018
NOT TO SCALE
U.S.G.S. QUAD TOPOGRAPHIC DRAWN BY: H.M.
AWARD MAP CHECKED BY: H.M.
ENGINEERING, INC 4911 BALD CYPRESS TRAIL PROJ.NO: 20-7965A
FORT PIERCE, FL 34951 DATE: 04-15-2020
rvora�wr,K�vK
U.S. Fish and Wildlife Service
National Wetlands Inventor
WETLAND MAP PLATE#6
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1:1,511 ��, `a •�'�iae
y 0 0.0125 0.025 0.05 mi
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0 0.02 0.04 0.08 km Y
April 15,2�20 This map is for general reference only.The US Fish and Wildlife
p Service is not responsible for the accuracy or currentness of the
base data shown on this map.All wetlands related data should
Wetlands
Freshwater Emergent Wetland . Lake be used in accordance with the layer metadata found on the
Wetlands Mapper web site.
Estuarine and Marine Deepwater ® Freshwater Forested/Shrub Wetland Other
Estuarine and Marine Wetland Freshwater Pond Riverine
National Wetlands Inventory(NWI)
This page was produced by the NWI mapper
PLATE#7
TEST PIT TP- 1
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INT. FLOOR
TEST PIT TP-2
a
d
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4
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INT. FLOOR
TEST PIT EXCAVATION DRAWN BY: H.M.
AWARD DETAIL CHECKED BY: H.M.
ENGINEERING, INC 4911 BALD CYPRESS TRAIL PROJ.NO: 20-7965A
FORT PIERCE, FL 34951 DATE: 05-13-2020
T.R. #20-7965A
BORING LOG # HA-1 PLATE # 8
Weather: Cloudy Project Site: 4911 Bald Cypress Trail
Fort Pierce, FL 34951
Location: (See Location Map) Date: April 9, 2020
Water Level: Not encountered Insitu Test(s): None
Depth (ft) Description Remarks
0-1 1 Dark Gray Fine Sand
1-2 2 Dark Gray Fine Sand with Organic Soil
2-3 3 Dark Gray Fine Sand with Organic Soil
3-4 4 Dark Gray Fine Sand with Organic Soil
4-5 5 Tan & Light Gray Fine Sand
5-6 6 Light Tan Fine Sand
6-7 7 Dark Gray & Brown Fine Sand with Moist
Organic Soil
7-8 8
8-9 9
9-10 10
AWARD Engineering, Inc.
T.R. #20-7965A
BORING LOG # HA-2 PLATE # 9
Weather: Cloudy Project Site: 4911 Bald Cypress Trail
Fort Pierce, FL 34951
Location: (See Location Map) Date: April 9, 2020
Water Level: Not encountered Insitu Test(s): None
Depth (ft) Description Remarks
0-1 1 Dark Gray Organic Soil With roots
1-2 2 Tan & Gray Fine Sand
2-3 3 Dark Gray & Brown Fine Sand with
Organic Soil
3-4 4 Dark Gray & Brown Fine Sand with
Organic Soil
4-5 5 Grayish Tan Fine Sand
5-6 6 Light Tan Fine Sand
6-7 7 Dark Brown & Gray Fine Sand Moist
7-8 8
8-9 9
9-10 10
AWARD Engineering, Inc.
T.R. #20-7965A
BORING LOG # HA-3 PLATE # 10
Weather: Cloudy Project Site: 4911 Bald Cypress Trail
Fort Pierce, FL 34951
Location: (See Location Map) Date: April 9, 2020
Water Level: Not encountered Insitu Test(s): None
Depth (ft) Description Remarks
0-1 1 Dark Brown & Gray Fine Sand
1-2 2 Dark Brown & Gray Fine Sand with
Organic Soil
2-3 3 Light Brown Fine Sand
3-4 4 Dark Brown & Dark Gray Organic Soil
4-5 5 Gray & Tan Fine Sand
5-6 6 Light Tan Fine Sand
6-7 7 Light Tan Fine Sand Moist
7-8 8
8-9 9
9-10 10
AWARD Engineering, Inc.
T.R. #20-7965A
APPENDIX "B"
SITE PHOTOGRAPHS
AWARD Engineering, Inc.
4911 BALD CYPRESS • •
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T.R. #20-7965A
APPENDIX "C"
SPECIFICATIONS OF REMEDIATION TECHNIQUES
AWARD Engineering, Inc.
T.R. #20-7965A
SPECIFICATIONS OF UNDERPINNING PIERS
AWARD Engineering, Inc.'s recommendations include underpinning pressure piers installed at
the structure.
The intent of the underpinning is to re-support the foundation slab by piles bearing onto the
competent material at depth. The installation of the underpinning piles will lift and/or support the
structure. The type of underpinning pile assembly, including mounting bracket, will be submitted
to AWARD by the Contractor for AWARD's approval.
It is our recommendation that the foundation of the structure be stabilized through the
installation of underpinning piles around the perimeter of the structure. These piles will be
driven, hydraulically advanced, jetted, or drilled to reach the recommended depth and/or
pressure. The depth of underpinning is likely to vary. Pile spacing should be approximately 6 to
8 feet on center; should not be located more than 3 feet from any corner unless a spreader
beam is utilized; and should not be located under any window or opening unless approved by
the overseeing AWARD Engineer. The locations of the underpins may require adjustment by the
contractor based on site conditions, but the overseeing Professional Engineer must approve any
adjustments.
It is important to note that the optimum level to which the structure can be lifted as a result of the
underpinning process is a function of the structural configuration as well as the amount of long-
term and irreversible stresses that have accumulated. It may not be practical to attempt to
completely re-level the structure, as excessive collateral damage may result. It is our
recommendation that the structure be carefully monitored during the lifting process.
AWARD Engineering, Inc.