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HomeMy WebLinkAboutAACE 21-185_10525 South Ocean Drive_Sweet_060821ANDERSEN ANDRE CONSULTING ENGINEERS, INC. Geotechnical Engineering Construction Materials Testing Environmental Consulting AACE File No. 21-185 June 8, 2021 Sweet Industries 3561 SE Micanopy Terrace Stuart, FL 34997 Attn: Mr. Eric Sweet GEOTECHNICAL ENGINEERING EVALUATION PROPOSED ADDITIONS 10525 SOUTH OCEAN DRIVE - HUTCHINSON ISLAND ST. LUCIE COUNTY, FLORIDA In accordance with your request and authorization, Andersen Andre Consulting Engineers, Inc. (AACE) has completed a subsurface soil exploration at the above captioned site. The purpose of performing this exploration was to explore shallow soil types and groundwater levels as they relate to the proposed single-story additions. Our work included auger borings, engineering analysis, and the preparation of this report which presents our findings and summarizes our conclusions and recommendations. PROJECT DESCRIPTION We understand that is proposed to construct two single-story CMU additions to the existing single- story building located at 10525 South Ocean Drive on Hutchinson Island. The new additions are proposed to be supported on shallow foundations and thickened-edge concrete slabs-on-grade. GENERAL SUBSURFACE SOIL AND GROUNDWATER CONDITIONS Detailed subsurface conditions are illustrated on the soil boring profiles presented on the attached Sheet No. 1 along with our Boring Location Plan. The stratification of the boring profiles represents our interpretation of the field boring logs and the results of laboratory examinations of the recovered samples. The stratification lines represent the approximate boundary between soil types. The actual transitions may be more gradual than implied. In general, at the locations and depths explored, our borings performed within the proposed addition footprints encountered fine sands (SP) with rock and shell fragments reaching the termination depths of our borings. The boreholes were probed incrementally throughout the explored depths, indicating that the encountered sands were in a firm condition. 834 Swan Avenue, Port St. Lucie, Florida 34983 Ph: 772-807-9191 Fx: 772-807-9192 www.aaceinc.com 10525 SOUTH OCEAN DRIVE - HUTCHINSON ISLAND AACE File No. 21-185 Page -2- The groundwater was encountered in the boreholes at depths of about 5-5.5 feet below the existing grade. Fluctuations in groundwater levels on this site should be anticipated throughout the year primarily due to seasonal variations in rainfall and other factors that may vary from the time the borings were completed. USDA Soil Survey According to the USDA NRCS Web Soil Survey, the predominant surficial soil type within the proposed building site are the Arents, 0 to 5 percent slopes (USDA Map Unit 5) and the Canaveral fine sand, 0 to 5 percent slopes (USDA Map Unit 10). These soil types are described by the USDA as consisting of altered and sandy marine deposits originating from within flats, ridges and rises on historical coastal marine terraces, with sands present to depths in excess of 80 inches. The approximate location of the site is shown superimposed on a copy of the USDA Web Soil Survey aerial photograph, presented on Sheet No. 1, and excerpts from the USDA Web Soil Survey Summary Report are attached hereto. EVALUATION Based on the findings of our site exploration, our evaluation of subsurface conditions, and judgement based on our experiences with similar projects, we conclude that the soils underlying this site are generally satisfactory to support the proposed additions on shallow foundations and/or monolithic concrete slabs. The foundations or thickened-edges can be proportioned for an allowable bearing stress of 2,500 pounds per square foot (psf). We recommend that all slab areas and the bottom of thickened edge foundations and spread foundations be tamped with a heavy vibratory plate tamper so as to produce dry densities not less than 95 percent of the modified Proctor (ASTM D1557) maximum dry density of the compacted material to depths of 1 foot below the compacted surface. Fill needed to raise the site should be placed in level lifts of no more than 12 inches and compacted similarly. With the site prepared and the foundations designed and constructed as recommended, we anticipate total settlements of one inch or less, and differential settlement between adjacent similarly loaded footings less than one-quarter of an inch. Because of the granular nature of the subsurface soils, the majority of the settlements should occur during construction; post- construction settlement should be minimal. 10525 SOUTH OCEAN DRIVE - HUTCHINSON ISLAND AACE File No. 21-185 Page -3- CLOSURE This report has been prepared in accordance with generally accepted local foundation engineering practice for the exclusive use of Sweet Industries. This report may not account for any variations that may exist between conditions observed in the borings and conditions at locations that were not explored. The nature and extent of any such variations may not become evident until construction is underway. If variations are then observed, we recommend that AACE should be requested to review the conclusions and recommendations in this report. It has been a pleasure to assist you on this phase of your project. Please do not hesitate to contact us if you have any questions concerning this report, or if we may be of further service to you. Attachments: Sheet No. 1 USDA NRCS Web Soil Survey Report (excerpts) Limitations and Conditions ANDERSEN ANDRE CONSULTING ENGINEERS, INC. WWW.AACEINC.COM BORING LOCATION PLAN ANDSOIL BORING PROFILESChecked by: DPADrawn by: PGASheet No. 1ANDERSEN ANDRE CONSULTING ENGINEERS, INC.10051005DEPTH (BLS) - FEET ...within Section 11Township 37 SouthRange 41 EastAB-#AUGER BORING (ASTM D1452)GROUNDWATER TABLE (FT BELOW EXIST. GRADE) AT TIME DRILLEDEOBEND OF BORINGBLSBELOW LAND SURFACESP UNIFIED SOIL CLASSIFICATION SYSTEM [USCS]USCS GROUPS DETERMINED BY VISUAL CLASSIFICATIONX,X'NOTES:LEGEND:Shown boring locations are approximate. All boringlocations were located using the provided site plan,obtained aerial photographs, existing site features,and tape/wheel measurements. The shown boringlocations should be considered accurate only to thedegree implied by the method of measurement used.834 SW Swan Avenue, Port St. Lucie, FL 34983 772-807-9191 www.AACEinc.comCertificate of Authorization No. 26794NOTES AND LEGENDTOPSOILAB-#Auger Boring5.0'EOB @ 7' BLSAB-1DRILL DATE: 06/02/21AACEFINE SAND (SP)BROWN/DK. BROWN FINE SAND (SP)GEOTECHNICAL ENGINEERING EVALUATIONPROPOSED ADDITIONS10525 SOUTH OCEAN DRIVE - HUTCHINSON ISLANDST. LUCIE COUNTY, FLORIDAAACE File No: 21-185Date: June 2021Date: June 2021USDA NRCS SOIL TYPES ON SITE4: Arents, 0 to 5 percent slopes10: Canaveral fine sand, 0 to 5 percent slopes2021 AERIAL PHOTOGRAPHSource: USDA NRCS Web Soil SurveyBORING LOCATION PLANSource: Google Earth ProSITEBROWN/ORANGISH-BROWN FINE SAND (SP)W. ROCK FRGMAB-1AB-2GRAY-BROWN FINE SAND (SP)W. ROCK AND SHELL FRGM5.5'EOB @ 7' BLSAB-2DRILL DATE: 06/02/21BROWN/DK. BROWN FINE SAND (SP)GRAY-BROWN FINE SAND (SP)GRAY FINE SAND (SP)W. ROCK AND SHELL FRGMORANGE-BROWN FINE SAND (SP) United States Department of Agriculture A product of the National Cooperative Soil Survey, a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local participants Custom Soil Resource Report for St. Lucie County, Florida 10525 South Ocean Drive Natural Resources Conservation Service May 26, 2021 9 Custom Soil Resource Report Soil Map (10525 South Ocean Drive)30169703016980301699030170003017010301702030170303016970301698030169903017000301701030170203017030578460 578470 578480 578490 578500 578510 578520 578530 578540 578550 578460 578470 578480 578490 578500 578510 578520 578530 578540 578550 27° 16' 26'' N 80° 12' 26'' W27° 16' 26'' N80° 12' 22'' W27° 16' 24'' N 80° 12' 26'' W27° 16' 24'' N 80° 12' 22'' WN Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 17N WGS84 0 20 40 80 120 Feet 0 5 10 20 30 Meters Map Scale: 1:492 if printed on A landscape (11" x 8.5") sheet. Soil Map may not be valid at this scale. MAP LEGEND MAP INFORMATION Area of Interest (AOI) Area of Interest (AOI) Soils Soil Map Unit Polygons Soil Map Unit Lines Soil Map Unit Points Special Point Features Blowout Borrow Pit Clay Spot Closed Depression Gravel Pit Gravelly Spot Landfill Lava Flow Marsh or swamp Mine or Quarry Miscellaneous Water Perennial Water Rock Outcrop Saline Spot Sandy Spot Severely Eroded Spot Sinkhole Slide or Slip Sodic Spot Spoil Area Stony Spot Very Stony Spot Wet Spot Other Special Line Features Water Features Streams and Canals Transportation Rails Interstate Highways US Routes Major Roads Local Roads Background Aerial Photography The soil surveys that comprise your AOI were mapped at 1:24,000. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Soil Survey Area: St. Lucie County, Florida Survey Area Data: Version 14, Jun 9, 2020 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Mar 8, 2019—Mar 28, 2019 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. Custom Soil Resource Report 10 Map Unit Legend (10525 South Ocean Drive) Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI 4 Arents, 0 to 5 percent slopes 0.6 63.8% 10 Canaveral fine sand, 0 to 5 percent slopes 0.3 36.2% Totals for Area of Interest 0.9 100.0% Map Unit Descriptions (10525 South Ocean Drive) The map units delineated on the detailed soil maps in a soil survey represent the soils or miscellaneous areas in the survey area. The map unit descriptions, along with the maps, can be used to determine the composition and properties of a unit. A map unit delineation on a soil map represents an area dominated by one or more major kinds of soil or miscellaneous areas. A map unit is identified and named according to the taxonomic classification of the dominant soils. Within a taxonomic class there are precisely defined limits for the properties of the soils. On the landscape, however, the soils are natural phenomena, and they have the characteristic variability of all natural phenomena. Thus, the range of some observed properties may extend beyond the limits defined for a taxonomic class. Areas of soils of a single taxonomic class rarely, if ever, can be mapped without including areas of other taxonomic classes. Consequently, every map unit is made up of the soils or miscellaneous areas for which it is named and some minor components that belong to taxonomic classes other than those of the major soils. Most minor soils have properties similar to those of the dominant soil or soils in the map unit, and thus they do not affect use and management. These are called noncontrasting, or similar, components. They may or may not be mentioned in a particular map unit description. Other minor components, however, have properties and behavioral characteristics divergent enough to affect use or to require different management. These are called contrasting, or dissimilar, components. They generally are in small areas and could not be mapped separately because of the scale used. Some small areas of strongly contrasting soils or miscellaneous areas are identified by a special symbol on the maps. If included in the database for a given area, the contrasting minor components are identified in the map unit descriptions along with some characteristics of each. A few areas of minor components may not have been observed, and consequently they are not mentioned in the descriptions, especially where the pattern was so complex that it was impractical to make enough observations to identify all the soils and miscellaneous areas on the landscape. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The objective of mapping is not to delineate pure taxonomic classes but rather to separate the landscape into landforms or Custom Soil Resource Report 11 landform segments that have similar use and management requirements. The delineation of such segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, however, onsite investigation is needed to define and locate the soils and miscellaneous areas. An identifying symbol precedes the map unit name in the map unit descriptions. Each description includes general facts about the unit and gives important soil properties and qualities. Soils that have profiles that are almost alike make up a soil series. Except for differences in texture of the surface layer, all the soils of a series have major horizons that are similar in composition, thickness, and arrangement. Soils of one series can differ in texture of the surface layer, slope, stoniness, salinity, degree of erosion, and other characteristics that affect their use. On the basis of such differences, a soil series is divided into soil phases. Most of the areas shown on the detailed soil maps are phases of soil series. The name of a soil phase commonly indicates a feature that affects use or management. For example, Alpha silt loam, 0 to 2 percent slopes, is a phase of the Alpha series. Some map units are made up of two or more major soils or miscellaneous areas. These map units are complexes, associations, or undifferentiated groups. A complex consists of two or more soils or miscellaneous areas in such an intricate pattern or in such small areas that they cannot be shown separately on the maps. The pattern and proportion of the soils or miscellaneous areas are somewhat similar in all areas. Alpha-Beta complex, 0 to 6 percent slopes, is an example. An association is made up of two or more geographically associated soils or miscellaneous areas that are shown as one unit on the maps. Because of present or anticipated uses of the map units in the survey area, it was not considered practical or necessary to map the soils or miscellaneous areas separately. The pattern and relative proportion of the soils or miscellaneous areas are somewhat similar. Alpha-Beta association, 0 to 2 percent slopes, is an example. An undifferentiated group is made up of two or more soils or miscellaneous areas that could be mapped individually but are mapped as one unit because similar interpretations can be made for use and management. The pattern and proportion of the soils or miscellaneous areas in a mapped area are not uniform. An area can be made up of only one of the major soils or miscellaneous areas, or it can be made up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example. Some surveys include miscellaneous areas. Such areas have little or no soil material and support little or no vegetation. Rock outcrop is an example. Custom Soil Resource Report 12 St. Lucie County, Florida 4—Arents, 0 to 5 percent slopes Map Unit Setting National map unit symbol: 1jptx Elevation: 0 to 30 feet Mean annual precipitation: 49 to 58 inches Mean annual air temperature: 70 to 77 degrees F Frost-free period: 350 to 365 days Farmland classification: Not prime farmland Map Unit Composition Arents and similar soils:90 percent Minor components:10 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Arents Setting Landform:Rises on marine terraces Landform position (three-dimensional):Rise Down-slope shape:Convex Across-slope shape:Linear Parent material:Altered marine deposits Typical profile C1 - 0 to 10 inches: sand C2 - 10 to 51 inches: sand A/Eb - 51 to 80 inches: sand Properties and qualities Slope:0 to 5 percent Depth to restrictive feature:More than 80 inches Drainage class:Somewhat poorly drained Runoff class: High Capacity of the most limiting layer to transmit water (Ksat):High to very high (5.95 to 19.98 in/hr) Depth to water table:About 18 to 36 inches Frequency of flooding:None Frequency of ponding:None Maximum salinity:Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Sodium adsorption ratio, maximum:4.0 Available water capacity:Very low (about 3.0 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 6s Hydrologic Soil Group: A Forage suitability group: Forage suitability group not assigned (G156BC999FL) Other vegetative classification: Forage suitability group not assigned (G156BC999FL) Hydric soil rating: No Custom Soil Resource Report 13 Minor Components Sanitary landfill Percent of map unit:5 percent Hydric soil rating: Unranked Canaveral Percent of map unit:5 percent Landform:Dunes on marine terraces, ridges on marine terraces Landform position (three-dimensional):Interfluve Down-slope shape:Convex Across-slope shape:Linear Other vegetative classification:Forage suitability group not assigned (G156BC999FL) Hydric soil rating: No 10—Canaveral fine sand, 0 to 5 percent slopes Map Unit Setting National map unit symbol: 2x9fd Elevation: 0 to 130 feet Mean annual precipitation: 42 to 63 inches Mean annual air temperature: 68 to 77 degrees F Frost-free period: 350 to 365 days Farmland classification: Not prime farmland Map Unit Composition Canaveral and similar soils:85 percent Minor components:15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Canaveral Setting Landform:Flats on marine terraces, ridges on marine terraces Landform position (two-dimensional):Summit, backslope Landform position (three-dimensional):Interfluve, tread, talf Down-slope shape:Concave, convex Across-slope shape:Linear Parent material:Sandy marine deposits Typical profile A - 0 to 5 inches: fine sand C - 5 to 17 inches: fine sand Ck1 - 17 to 49 inches: paragravelly fine sand Ck2 - 49 to 80 inches: very paragravelly fine sand Properties and qualities Slope:0 to 5 percent Depth to restrictive feature:More than 80 inches Custom Soil Resource Report 14 Drainage class:Somewhat poorly drained Runoff class: Negligible Capacity of the most limiting layer to transmit water (Ksat):Very high (19.98 to 39.96 in/hr) Depth to water table:About 18 to 42 inches Frequency of flooding:None Frequency of ponding:None Calcium carbonate, maximum content:4 percent Maximum salinity:Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Sodium adsorption ratio, maximum:5.0 Available water capacity:Low (about 4.8 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 6s Hydrologic Soil Group: A Forage suitability group: Forage suitability group not assigned (G155XB999FL) Other vegetative classification: Forage suitability group not assigned (G155XB999FL) Hydric soil rating: No Minor Components St. augustine Percent of map unit:6 percent Landform:Marine terraces Landform position (three-dimensional):Tread, rise Down-slope shape:Linear Across-slope shape:Convex Other vegetative classification:Forage suitability group not assigned (G155XB999FL) Hydric soil rating: No Myakka Percent of map unit:3 percent Landform:Drainageways on flatwoods on marine terraces Landform position (three-dimensional):Tread, dip, talf Down-slope shape:Linear Across-slope shape:Linear, concave Other vegetative classification:South Florida Flatwoods (R155XY003FL), Sandy soils on flats of mesic or hydric lowlands (G155XB141FL) Hydric soil rating: No Pompano Percent of map unit:3 percent Landform:Depressions on marine terraces Landform position (three-dimensional):Tread, dip Down-slope shape:Concave Across-slope shape:Concave Other vegetative classification:Freshwater Marshes and Ponds (R155XY010FL), Sandy soils on stream terraces, flood plains, or in depressions (G155XB145FL) Hydric soil rating: Yes Palm beach Percent of map unit:2 percent Landform:Dunes on marine terraces, ridges on marine terraces Custom Soil Resource Report 15 Landform position (two-dimensional):Backslope, summit Landform position (three-dimensional):Side slope, tread Down-slope shape:Convex, linear Across-slope shape:Linear, convex Other vegetative classification:Sandy soils on ridges and dunes of xeric uplands (G156BC111FL) Hydric soil rating: No Captiva Percent of map unit:1 percent Landform:Flats on marine terraces Landform position (three-dimensional):Tread, talf Down-slope shape:Linear Across-slope shape:Concave Other vegetative classification:Slough (R155XY011FL), Sandy soils on flats of mesic or hydric lowlands (G155XB141FL) Hydric soil rating: Yes Custom Soil Resource Report 16 ANDERSEN ANDRE CONSULTING ENGINEERS, INC. Project Limitations and Conditions Andersen Andre Consulting Engineers, Inc. has prepared this report for our client for his exclusive use, in accordance with generally accepted soil and foundation engineering practices. No other warranty, expressed or implied, is made herein. Further, the report, in all cases, is subject to the following limitations and conditions: VARIABLE/UNANTICIPATED SUBSURFACE CONDITIONS The engineering analysis, evaluation and subsequent recommendations presented herein are based on the data obtained from our field explorations, at the specific locations explored on the dates indicated in the report. This report does not reflect any subsurface variations (e.g. soil types, groundwater levels, etc.) which may occur adjacent or between borings. The nature and extent of any such variations may not become evident until construction/excavation commences. In the event such variations are encountered, Andersen Andre Consulting Engineers, Inc. may find it necessary to (1) perform additional subsurface explorations, (2) conduct in-the-field observations of encountered variations, and/or re-evaluate the conclusions and recommendations presented herein. We at Andersen Andre Consulting Engineers, Inc. recommend that the project specifications necessitate the contractor immediately notifying Andersen Andre Consulting Engineers, Inc., the owner and the design engineer (if applicable) if subsurface conditions are encountered that are different from those presented in this report. No claim by the contractor for any conditions differing from those expected in the plans and specifications, or presented in this report, should be allowed unless the contractor notifies the owner and Andersen Andre Consulting Engineers, Inc. of such differing site conditions. Additionally, we recommend that all foundation work and site improvements be observed by a Andersen Andre Consulting Engineers, Inc. representative. SOIL STRATA CHANGES Soil strata changes are indicated by a horizontal line on the soil boring profiles (boring logs) presented within this report. However, the actual strata change may be more gradual and indistinct. Where changes occur between soil samples, the locations of the changes must be estimated using the available information and may not be at the exact depth indicated. SINKHOLE POTENTIAL Unless specifically requested in writing, a subsurface exploration performed by Andersen Andre Consulting Engineers, Inc. Is not intended to be an evaluation for sinkhole potential. MISINTERPRETATION OF SUBSURFACE SOIL EXPLORATION REPORT Andersen Andre Consulting Engineers, Inc. is responsible for the conclusions and recommendations presented herein, based upon the subsurface data obtained during this project. If others render conclusions or opinions, or make recommendations based upon the data presented in this report, those conclusions, opinions and/or recommendations are not the responsibility of Andersen Andre Consulting Engineers, Inc. CHANGED STRUCTURE OR LOCATION This report was prepared to assist the owner, architect and/or civil engineer in the design of the subject project. If any changes in the construction, design and/or location of the structures as discussed in this report are planned, or if any structures are included or added that are not discussed in this report, the conclusions and recommendations contained in this report may not be valid. All such changes in the project plans should be made known to Andersen Andre Consulting Engineers, Inc. for our subsequent re-evaluation. USE OF REPORT BY BIDDERS Bidders who are reviewing this report prior to submission of a bid are cautioned that this report was prepared to assist the owners and project designers. Bidders should coordinate their own subsurface explorations (e.g.; soil borings, test pits, etc.) for the purpose of determining any conditions that may affect construction operations. Andersen Andre Consulting Engineers, Inc. cannot be held responsible for any interpretations made using this report or the attached boring logs with regard to their adequacy in reflecting subsurface conditions which may affect construction operations. IN-THE-FIELD OBSERVATIONS Andersen Andre Consulting Engineers, Inc. attempts to identify subsurface conditions, including soil stratigraphy, water levels, zones of lost circulation, “hard” or “soft” drilling, subsurface obstructions, etc. However, lack of mention in the report does not preclude the presence of such conditions. LOCATION OF BURIED OBJECTS Users of this report are cautioned that there was no requirement for Andersen Andre Consulting Engineers, Inc. to attempt to locate any man-made, underground objects during the course of this exploration, and that no attempts to locate any such objects were performed. Andersen Andre Consulting Engineers, Inc. cannot be responsible for any buried man-made objects which are subsequently encountered during construction. PASSAGE OF TIME This report reflects subsurface conditions that were encountered at the time/date indicated in the report. Significant changes can occur at the site during the passage of time. The user of the report recognizes the inherent risk in using the information presented herein after a reasonable amount of time has passed. We recommend the user of the report contact Andersen Andre Consulting Engineers, Inc. with any questions or concerns regarding this issue.