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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. Rlespectfull�y�subrnittpmd, t�did l� A-■A ` - /^IWC. Dgtalle,M.by I Hovhannes urad an PE DN c U5,st Florda, M j.��', j,•, Hovhannes &andon,o HovhannesA Q • Mourad an PE, �l 1 c Mouradian HovhannesMouradan �� � —...,.•a..... mat hov emourad an@g P.E. mal�om ,�.�...w...m»..,..,m..®.M."Date.2020°5,517:59:22 PnoK i�t ngit n: 78439 °"° S124 ct o a 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. AWARD Engineering, Inc. Page 1 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 AWARD Engineering, Inc. Page 2 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 AWARD Engineering, Inc. Page 3 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 AWARD Engineering, Inc. Page 4 T.R. #20-7965A 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) AWARD Engineering, Inc. Page 5 T.R. #20-7965A 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. AWARD Engineering, Inc. Page 6 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, AWARD Engineering, Inc. Page 7 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 AWARD Engineering, Inc. Page 8 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. AWARD Engineering, Inc. Page 9 T.R. #20-7965A 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. AWARD Engineering, Inc. Page 10 T.R. #20-7965A 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. AWARD Engineering, Inc. Page 11 T.R. #20-7965A 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 State q �� 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 7t31 island pines golf 0 e F�s� e chubbies �+ Neighborhood u Restaura... Nino s Lakewood Park 2 a ySchodI� �Wirr-Dxie 4911 Bald Cypress TH. eu vve. Fort Pierce, FL 34951 6,4 Indrio CVS PhArmacy North Savannas 5_� Dike 713 = 2500 feet 500 m LN Bing = i. ®2020 HERE,®O enStreetMa N NOT TO SCALE 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 0 SCREENED-IN PATIO cmr— TP O FRONT ENTRANCE LIRRIGATION ® TP-1 GARAGE PHA-1 DRIVEWAY 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 - L �- ''�i�, , i..�a•-y � ��-� i" � fi�!-�.�. -y�4 r Y ,�31 !y _ -y�,M�. 74i0 F-21 71, 417 14 74, Alki 11 i ♦'i ,7y/�T � 9tP _ � I '4° .54�+1�.�� ��'�+rz.+' c ;y�*"��y�.�.y�3�. 4 ! � n4 N NOT TO SCALE 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 581920 561930 561940 551950 561980 561970 551980 561990 562000 562010 5mm 562CW 562040 562050 27°31'23N a P f. 1 27°31 20'N 5619M 561mo 561940 5619W 56198D 5619M 561980 561990 562000 562010 562020 5M030 562(k0 5620M 3 Map Sole:1:653 if pdnted on A landscape(11"x 8.5")sheet Metes NN 0 5 10 20 30 ,\ 0 30 60 120 1 V ///���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 SNAIL KITE LN 4 �. ,. SWALLOW LN uj 0 Subjec &perry c; 30y 20 -- - : , �. ROAD CLASSIFICATION Expressway Loral Lonnerlor 5-..d ry Hwy Lora{Road R—p 4W0 _..._.. !Interstate Mute 0 US R— 0—.-- I Vero Rearh 1 1 2 Rio.ar w:+o: CONTOUR INTERVAL 10 FEET 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 T F i *. ` . . 1:1,511 ��, `a •�'�iae y 0 0.0125 0.025 0.05 mi i . 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 a a 4 O 4 Q d Q INT. FLOOR TEST PIT TP-2 a d a 4 O 4 O 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 • • i% AWARD Engineering, 4911 ; . ■ CYPRESS T.R. . , : ' © � � � °•�� �� ® - _ - . � . AWARD Engineering, 4911 BALD CYPRESS • • i F ' 10 AWARD �f ti W �y s � 1� Engineering, 4911 BALD CYPRESS TRAIL T.R. #20-7965A .. e �' J♦. .y., � _ rota} �l - d •ar J•.V+C 70 f. x., ?. i I ,•1 jk ;L AF --- t i 1 A J AWARD Engineering, Inc. 4911 BALD CYPRESS • • x �r� Cl AWARD a i I it Engineering, 4911 BALD CYPRESS • • ,: z r AWARD Engineering, 4911 BALD CYPRESS TRAIL T.R. #20-7965A AWARD Engineering, Inc. 4911 BALD CYPRESS TRAIL T.R. #20-7965A A �pt 1'tR' rt€` ,f Y_ AWARD Engineering, Inc. 4911 BALD CYPRESS • • 1,7 AWARD ` ••„ a-: a Engineering, 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.