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Home My WebLink AboutPRELIMINARY SUBSURFACE EXPLORATIONL6600- IVED 2 2 i 1K'c �'IPfitt£I�1"� UNIVERSAL ENGINEERING SCIENCES PRELIMINARY SUBSURFACE EXPLORATION Proposed Oakland Lake Estates Subdivision Oakland Lake Circle Fort Pierce, Saint Lucie County, Florida Univers I Project No. 0330.1700052.0000 May 19, 2017 PREPARED FOR: Ryan Homes i Vista Parkway, Suite 102 Palm Beach, Florida 33411 IPREPARED BY: Universal Engineering Sciences, Inc. 820 Brevard Avenue Rockledge, Florida 32955 1 Se (321) 638-0808 Consultants in: Geotechnical Engineering • Environmental Sciences • Construction Materials Testing - Threshold Inspection Offices in: Orlando • Daytona Beach • Fort Myers • Gainesville - Jacksonville • Ocala • Palm Coast • Rockledge • Sarasota Miami - Panama City • Pensacola - Fort Pierce • Tampa - West Palm Beach • Atlanta, GA • Tifton, GA - I sAL U N1. i EI401NEE:R1N;G SCilENC.ES Consultants`.In Geotech�ieaLEngineering t'Enviio'nmental Sciences GeophysicalServlces ConstructionMaterialsTesting Threshold_ Inspection Building Inspection Plan Review • Building Code Administration Ryan Homes 1450 Ce'ntrepark Boulevard, Suite 340 West Palm Beach, Florida 33401 Attention: Mr. Michael De Reference: Preliminary Sub: Proposed Oaklan, Oakland Lake Cir Fort Pierce,. Saint Universal Project Dear Mr. DeBock: irface Exploration Lake Estates Subdivision ucie County, Florida o. 0330.1700052.0000 May 19, 2017 LOCATIONS: • Atlanta • Daytona Beach • Fort Myers Fort Pierce Gainesville • Jacksonviili: • Miami Ocala • Oriando.(Headquarters) Palm Coast Panama City .• ' .Pensacola +; Rockledge Sarasota :v.; Tampa • .West Palm Beach • Atlanta, GA • Tifton, GA Universal Engineering Sciences, Inc. (Universal) has completed a preliminary subsurface exploration at the above refere ced site in Fort Pierce, Saint Lucie County, Florida. Our exploration was authorized by yqu and was conducted as outlined in Universal's Proposal No. 0330.0417.00003. This exploration was performed in accordance with generally accepted soil and foundation engineering pract�ces. No other warranty, expressed or implied, is made. The following report presents thel results of our field exploration with a geotechnical engineering interpretation of those results with respect to the project characteristics as. provided to us. We have included our estimates of the -typical typical wet season high groundwater levels at the boring locations and general comments concerning anticipated soil support characteristics for typical low-rise residential buildings. We appreciate the opportunity continued association: Please d if we' may further. assist you as y Sincerely yours, UNIVERSAL ENGINEERING Certificate ofMtfioriz0dh No. 549 Jose R. Benitez Jr., Ea.,. Staff Engineer 2 — Addressee UESDOCS #1450465 820 Brevard-Avenue, have worked with you on this project and look forward to a not hesitate to cor jr plans proceed: NCESj INC. Brad Faucett, M.S. P:E, I! Regional. Engineer Florida Professional;'Engineer Florida 32955 (321) 638-0808 Fax (321) :638-0978 1 iiversalEngineenng. com TABLE OF CONTENTS 1.0 INTRODUCTION .............................................................:..:...:...::::.:.:....:..::.: 1 2.0 PROJECT DESCRIPTION.......,, 3.0 PURPOSE ........................ ::.:::::::::.::.:::.::..::::.::::::......:::.:::.::::::::...::::, .::.:.:.:::::.::r 4.0 SITE DESCRIPTION 4.1 SOIL SURVEY .......................... ........... ....... 4.2 TOPOGRAPHY .......................... ..:... _ _.�...........2 ................................ ......... ......... ... .. 5.0 SCOPE OF SERVICES........ f......................................................... ..... ............:..................:..2 6.0 LIMITATIONS ........... :.::::::::::::::::::::::..::.;.:.:.......,...,,,.....,;...........,.............. .................. :.:.........:.3 7.0 FIELD METHODOLOGIES.... ................ ... . _. _ . ......: ....:.. ....... .:4 7.1 STANDARD PENETRATION TESTS ............... _,..- <- . ....._..,.. 4 7.2 DYNAMIC CONE PENETROMETER TESTS „ 4 7.3 PAVEMENT CORE SAMPLES ..........,,,.;.. , 8.0 LABORATORY METHODOLbG1ES...................::..:....................:..:.............:.........::....................4 8.1 PARTICLE SIZE ANALYSIS...... ... 9.0 801L STRATIGRAPHY......... ....... ::.:::::::.:::..:::::::::::::5 9:1 PAVEMENT CORE RESULTS......... _....... ..., .. .,.r•_., ..._......._.... ............. , .. - _ ; ...................5 10.0 GROUNDWATER CONDITI NS....................... ,6 10.1 EXISTING GROUNDWATER CO DITIONS .......... 10.2 TYPICAL WET SEASON HIGH GROUNDWATER LEVEL .:.::::::.::.. ;;:;,;,;,;,;,;,6 11.0 LABORATORY _. _ .._ ............ ....... ,7 11.1 PARTICLE SIZE ANALYSIS..... ,7 12.1 PROPOSED BUILDING AREAS.A 13.0 CLOSURE ............................I.. . _. 8 LIST OF TABLES Table I: Saint Lucie County Soil Survey Designated Soil Types... 2 Table II: Generalized Soil Profile Table III: Pavement Core Results ..................... .... ,_ _ :.. _ _ ..:,....:. 6 820 Brevard Avenue, Rockledge, Florida 32955 (321) 638-0808 Fax (321) 638-0978. �www.UniversalEngineenng.com i I Boring Location Key to Boring Boring Logs ...... ...... FIGURES APPENDICES EXHIBITS Figure No. I .,,,.,Appendix A ...... ...... Appendix A GBADocument ........ .-,,,.Exhibit 1 820 Brevard Avenue, Ro' kledge,flodda 32955 (321),',638-0808 Fax (321) 638-0978 I www.u_hi.v, t.salEngineejing.Oqrp, Oakland Lake Estates Subdivision I Universal Project No. 0330.1700052.0000 Fort Pierce, Saint Lucie County, Florida Preliminary Subsurface Exploration 1.0 INTRODUCTION Universal. Engineering Sciences, exploration for the proposed Oa County, Florida. Our exploration was conducted as outlined in Uni, performed in accordance with ger other warranty, expressed or impli 2.0 PROJECT DESCRI Inca (Universal)- has completed a preliminary subsurface and Lake Estates .Subdivision 'in Fort Pierce, Saint Lucie as authorized by Mr. Michael DeBock of Ryan Homes and :rsal's.Proposal No. 0330.0417.00003. This exploration was rally accepted soil and foundation engineering practices. No J, is made: It is Universal's understanding, based upon information provided by the client, that the proposed project will consist of a residential subdivision in Fort Pierce, Florida; currently envisioned as shown in Figure No. 1. The proposed subdivision is intended to have seventy-three, (73) residential lots. We understand that the stormwatIer runoff from impervious surfaces to be developed at this site will be collected within an existing retention basin located in the central sections of the project area. Please note that our subsurface exploration was Aieiminary.in nature and conducted to acquire general subsurface information only. -.Once specified site configuration, building detail and structural and traffic loading info mation are available a final subsurface exploration should be performed. 3.0 PURPOSE The purposes of this exploration • to.explore the subsurfa I conditions at general locations and depths as requested by the client and • to, provide our estimateslof the typical wet season high groundwater levels at the boring locations and. • to provide general comments concerning the -anticipated soil support characteristics for typical low-rise residential construction. 4.0 SITE DESCRIPTION The subject site is located wit) County, Florida. More specific Street Road and North Kings vegetation consisted of mostl proposed subdivision. i Section.11, Township 34 South, Range 39 East in Saint Lucie Ily, the site is located on the northwest quadrant of Palomar ighway, in Fort Pierce, Florida. At the time of drilling, the site grass, along with an existing paved circular road around the 820 Brevard Avenule,, Rockledge, Florida 32955 (321) 638-0808 Fax (321) 1638-0978 www.Universa[Engineering.com Oakland Lake Estates Subdivision For` Pierce, Saint Lucie County, FI Universal Project No. 0330.1700052.0000 Preliminary Subsurface Exploration 4.1 SOIL SURVEY Two (2) soil types are mapped ithin the general project area according to the Saint Lucie County Soil Survey (SLCSS), dated 1980. A brief description of these soils is provided in the following Table I... TABLE SLCSS DESIGNATED SOIL TYPES Soil Type Brief description (Map. Symbol) ! Soil material that has been dug up from several areas with different Arents, 0 to 5 percent slopes.(4) i kinds of soil. It so used to and 111 up areas as such as low sloughs, marshes, allow depress ; . �; Nearly level, poorly drained sandy soils in broad areas in the Wabasso sand (48)latwoods 4.2 TOPOGRAPHY According to information obtai quadrangle map dated 1949, (pre=developmental) is.approx 5.0 SCOPE. OF SERVIC The services conducted by Ur as follows: • Drill seven .(7). Standard depth of 10 feet below exi • Core through the existing drill to ascertain the appn from the United States Geologic Survey (USGS) Oslo, Florida o-revised 1970, ground surface elevation across the site area ely +20 feet National Geodetic Vertical Datum (NGVD). during our preliminary subsurface exploration program are tration Test (SPT) borings within the project site area to a land surface (bls). ;nt sections at four (4) locations with a diamond tipped core thickness of the asphaltic surfacing and base course. Perform Dynamic Cone penetrometer (DCP) testing within the upper portions of the selected SPT boreholes to help further determine soil. consistencies. Secure samples of repres( analysis and classification • Measure the existing site season high groundwater I Conduct soil gradation their engineering prope • Assess the existing soil 820 Brevard Avenue, hive soils encountered in the soil borings for review, laboratory a Geotechnical Engineer. iter levels and provide an estimate of the typical wet on selected soil samples obtained in the field to help determine with respect to the proposed construction. 2 kledge, Florida 32b55 (321) 638-0808 Fax (321) 638-0978 www.Universa[Engineering.com Oakland Lake Estates Subdivision Fort Pierce, Saint Lucie County, FG Preparing a geotechnical eng subsurface exploration and la 6.0 LIMITATIONS Please note that.this report:is bz scope of services, general borin client. The information submitted performed at the locations indica referenced. This report has not I contractors, or any other parties, soil and foundation engineer wh erroneous assumptions, faulty co This report does not reflect any extent ,of such variations may n actual- construction. if variations the recommendations in this repo period and noting the characteriE at any, of our boring locations; he the entire property. Therefore, th and fill quantities. Universal Project No. 0330.1700052.0000 Preliminary Subsurface Exploration report which documentsthe results of our preliminary testing program with analysis and general comments. .d: on a preliminary subsurface exploration program with the locations and depths as developed in conjunction with the i this report is based on data obtained from the soil borings J on the Boring Location Plan and from other information as en prepared to meet the full needs of design professionals, id any use of this report by them without the guidance of the prepared it constitutes improper usage which could lead to ;lusions, and other,:problems.- ariations which .may occur across the site. The nature and become evident until the course of future explorations or an become.evident, it will be necessary for re-evaluation of after performing on -site observations during the construction ;s of any variations. Deleterious soils were not encountered never, we cannot completely preclude their presence across report should not be used for estimating such items as cut Our field exploration did not find lunsuitable or unexpected materials at the time of occurrence. However, borings -for a typical geotechnical report are widely spaced and generally not sufficient for reliably detecting the presen a of isolated, anomalous surface or subsurface conditions, or reliably estimating unsuitable or suitable material quantities. Accordingly, Universal does not recommend relying on our boring information to negate presence of anomalous materials or for estimation of material quantitiesi unless our contracted services specifically include sufficient exploration for such purpose(s) nd within the report we so state that the level of exploration provided should be sufficient to etect such anomalous conditions or estimate such quantities. Therefore, Universal will not be responsible for any extrapolation or use, of our data by others beyond the purposes) for which it is applicable or intended. All users of this report are cautioned that there was no requirement for Universal to attempt to locate any man-made buried objects or identify any other potentially hazardous conditions that may exist at the site during the Icourse of this exploration. Therefore no attempt was made by Universal to locate or .identify such concerns. Universal cannot be responsible. for any buried man-made objects or environmental hazards which may be subsequently encountered during construction that are not discussed within the text of this report. We can provide this service if requested. For a further description of the scope and limitations of this report please review the document attached within Exhibit 1 "Impoitant Information About Your Geotechnical Engineering Report" prepared by GBA/The Geoprofessional Business Association. 3 820 Brevard Avenue, Rockledge, Florida 32955 (321) 638-0808 Fax !(321) 638-0978 www.universalEngineering.com Oakland Lake Estates Subdivision Fort Pierce; Saint Lucie County, Florida 7.0 FIELD METHODOLOG 7.1 STANDARD PENETRATION The .seven (7) SPT borings, des performed in general accordance Penetration Test and 111 a standard split -barrel sampler int, number of blows required to driv designated the penetration resist The soil samples recovered from in general accordance with -the gu Engineering Purposes (Unified So Universal Project No. 0330.1700052. 0000 Preliminary Subsurface Exploration Inated B1 through B7 on the attached Figure No. 1, were faith the :procedures of ASTM D 1586 (Standard Method for ampling of Soils). The-SPT drilling technique involves driving the soil by a 140 pound hammer, free falling 30 inches. The the sampler 1 foot, after an initial seating of 6 inches, is rice, or, N-value, an index to soil strength and consistency. ie split=barrel sampler were, visually inspected and classified felines of ASTM D 2487 (Standard Classification of Soils.for Classification System]). The SPT soil borings were perfor ed with a CME 45 ATV mounted drilling rig..Universal.located the test borings in the field by us ng the provided site plan and by plotting in the field with a Garmin GPS receiver. No survey control was provided on -site, and our boring locations should be considered only as accurate as implied by the methods of measurement used. The approximate boring locations are shown on the attached Figure No. -1. 7.2 DYNAMIC CONE P Dynamic Cone Penetrometer (E selected 'SPT boreholes to help performed at 1 foot intervals.in ge G. F. Sowers and Charles S.-Hed follows: A standard 1.5 inch diar hammer falling 20 inches. Follow of blows required to drive the sa resistance,, providing an index to 7.3 PAVEMENT CORE ETER TESTS ;P) tests were performed within the upper portions: of the further determine soils consistencies. The DCP tests were feral accordance with the procedures developed by Professor les (ASCE, 1966). The basic procedure for the DCP test is as eter conical point is driven into the soil by a 15-pound steel ig the seating of the point to a depth of 2 inches, the number ipler an additional 1.75 inches is designated the penetration oil strength and density. Samples of the existing asphaltid pavement sections wereobtained at four (4) core locations (Cl through C4) with a 4 inch nominal diameter diamond bit core drill, advancing through the asphaltic pavement into the underlying base course materials.. Afterwards the core holes were backfilled and the surfacing patched with an asphaltic "cold patch" mixture and the core samples returned to our laboratory for subsequent examination. 8.0 LABORATORY METHODOLOGIES 8.1 PARTICLE SIZE ANAL We completed #200 sieve particle size analyses on seven (7). representative soil samples. These samples were tested according to the procedures listed ASTM D 1140 (Standard Test Method for Amount of Material .in Soils. Finer than the No. 200 Sieve). In part, ASTM D 1140 requires a thorough mixing the sample with water and flushing it through a No. 200 sieve until all of the'particles smaller than the sieve size leave the sample. 4 820 Brevard Avenue, Roc Ld a Florida 32955 321 638-0808 Fax 321 638-0978 www.UniversalEngineering.com Oakland Lake Estates Subdivision Fort Pierce, Saint Lucie County, FI Universal Project No. 0330.1700052.0000 Preliminary Subsurface Exploration The percentage of the material fine'r than the No. 200 sieve helps determines the textural nature of the soil sample :and aids in evaluating its engineering characteristics. The percentage of materials passing the #200 sieve is, shown on the attached boring logs. 9.0 SOIL STRATIGRAPHY The results of our field exploration and laboratory analysis, together with pertinent information obtained from the SPT borings, uch as soil profiles,. penetration resistance and stabilized groundwater'levels are shown on!the boring logs included in Appendix A. The Key to Boring Logs, Soil .Classification Chart Is �lso included in Appendix A. The soil profiles were prepared from field logs after the recovered soil samples were examined by a Geotechnical Engineer.' The stratification lines shown on Te boring logs represent the approximate boundaries between soil types,_ and may not depict exact subsurface soil conditions. The actual soil boundaries may be more transitional than depicted. A generalized profile of the soils encountered at.our boring locations is presented in the follov),ing Table 11L For more detailed soil profiles, please refer to the attached'boring logs. TABLE II ERALIZED SOIL PROFILE Depth Encountered ; (feet, bls) pp Thickness (feet) Soil -Description, lip ill soils consisting, of fine sands with varying quantities of silt; clay, Surface 2 to 9 ravel, broken shell, and clay lumps [SP, SP-SM, SC]; loose to medium dense. ighly intetlayered strata consisting of fine sands [$P], fine sands:; ith silt [SP-SM], and clayey fine sands [SC],with varying 2 to 9 1+ to 8+ quantities of broken shell -and occasional cemented rock layers; j! to dense. At boring location 132, the fine .sand with silt [SP-, Moose SM] strata Is partially cemented with iron oxide & organic salts and ' whi h is locally known as hardpan. NOTE: [ ] denotes Unified Soil Classitic�tion system designation. + indicates strata encountered at boring termination, total thickness undetermined.. 9.1 PAVEMENT CORE RESUL The results of our examination existing 'pavement sections are 820 8re6cl Avenue, J measurement of the core samples taken in the field:from the own in the following Table III: 5. s, Florida 32955 (321) 638-080i Fax (321,) 638-0978 UniversalEngineering.com i Oakland Lake Estates Subdivision Fort Pierce, Saint Lucie County, Florid Universal Project No. 0330.1700052.0000 Preliminary Subsurface Exploration TABLE III PAVEMENT CORE RESULTS Boring/Core Approximate ThicknessiType , Approximate Thickness Type of Base Course Location of Asphaltic Surfacing (inches) of Base Course (inches) Materials 0.7 S3 C1 1.0S 8'/z Coquina 13 ---0.8S,3 - - C2 1.1 S3 1.1 S3 81/ Coquina C3 1.0 §3 1.6 S3 8 Coquina 0.8 S3 _ C4 1.0 S�§ 1 10 Coquina I -- .7_ 0._S3 .-- _ _-- 1. See attacnea figure No. 1 for a 2. Classification of asphaltic laye parameters. 3. Subgrade soils consist mostly subgrade). 10.0 GROUNDWATER CO 10.1 EXISTING GROUNDWATER nate core locations. was performed visually and may not represent actual FDOT mix fine sands with traces of gravel & broken shell [SP] (i.e.. stabilized NDITIONS We measured the water levels in the boreholes on May 8, 2017 after the groundwater was allowed to stabilize. The groundwater levels are shown on the attached boring logs. The groundwater level depths ranged from 4.3 feet bis at boring location B6 to 5.7 feet bls at boring locations B2 and B7. Fluctuations In groundwater levels should be anticipated throughout the year, primarily due to seasonal variations in rainfall, surface runoff, and other factors that may vary from the time the borings were conducted. 10.2 TYPICAL WET SEASON HIGH GROUNDWATER LEVEL The typical wet season high groundwater level is defined as the highest groundwater level sustained for a period of 2 to 4 weeks during the "wet" season of the year, for existing site conditions, in a year with average normal rainfall amounts. Based on historical data, the rainy season in Saint Lucie County, Florida is between June and October of the year. In order to estimate the wet season water level at the boring locations, many factors are examined, including the following: a, Measured groundv b; Drainage characte C. Season of the yeas d. Current & historica e.., Natural relief point f. Man-made drainac g. Distances to relief rater level -istics of existing soil types (wet/dry season) rainfall data (recent and year-to-date) (such as lakes, rivers, swamp areas, etc.) e systems (ditches, canals, etc.) Joints and man-made drainage systems - 6 820 Brevard Avenue, Rockledge, Florida 32955 (321) 638-0808 Fax (321) 638-0978 ww w. UniversalEngineering.com Oakland Lake Estates Subdivision Fort Pierce, Saint Lucie County, Fl, h" On -site types of. is Area topography Universal Project'N6: 0330.1700052.0060. Preliminary Subsurface Exploration on i surface. elevations) Groundwater level readings were taken on May 8, 2017. According to data from the Southeast Regional Climate Center and the National Weather Service, the total rainfall in the previous month of April.for Central Saint Lucie .County was 2.2, inches, approximately at he normal levels for the month of April. Year-to=elate rainfall for 20.17 through May.8'. was approximately 6Y2 inches, roughly 6 inches below thq normal level for this time period. Based on this information and factors listed above, we estimate that the typical wet season high groundwater levels at the boring locations will be approximately 2Y2 feet above the existing measured levels. Please note, however, that peak. stage elevations immediately .following various intense storm events, may be somewhat higher than the :estimated typical wet season levels. Due to the variable silt and clay content within the near surface soils at this site, we suspect that there may be occasional isolated ockets of "perched" groundwater throughout the project area; particularly. during periods of prolonged wet weather. These temporary perched water .table levels may be higher than the,estir ated wet season high groundwater levels indicated above. 11.0 LABORATORY RESUL 11.1 PARTICLE SIZE ANALYSIS The soil samples submitted"for analysis were classified as fine sands. [SP]. The percentage of soil sizes passing the .#200 sieve size are shown on the boring logs at the approximate depth sampled. 12.0 ANALYSIS AND GE 12.1 PROPOSED BUILDING The removal of site vegetation. a loosen surficial soils to various .c system underneath the propose( dens ification of at least the uppe additional fill soils will be nece,ss; building loads. over any. remaining COMMENTS 1 roots, along with other construction activities, will further :pths. To provide a .homogeneous; compacted, sandy soil foundations and floor, slabs for the proposed residences,. 2 feet of the existing surficial; loose soils and subsequent y. This should.create a soil mat capable of dissipating the lose strata at depth. We believe that this can :be effectively accomplished using conventional site preparation procedures including -a a compre ensive root raking and stripping procedure to remove vegetation, root mats, debris and organic topsoils; and then an extensive proof -rolling and densification program for the surf'cial soils and subsequent structural fill. Assuming that such procedures are properly performed, we anticipate that conventional, shallow spread footing foundations may be.used to support conventional one,to twostory resltlentlal construction: 7 I 8k Brevard Avenue, Rockledge, Florida 32955 (321) 63ffi-0808 Fax (321) 638-0978 www.UniversalEngineering.com 0 Oakland Lake Estates Subdivision Fort Pierce, Saint Lucie County, R Universal Project No. 0330.1700052.0000 Preliminary Subsurface Exploration 13.0 CLOSURE We appreciate this opportunity to be of service as your geotechnical consultant on this phase of the project and look forward to providing follow up explorations and geotechnical engineering analyses .as the project progresses through the design phase. If you have any questions concerning this report or when we may be of any,further service, please contact us. 8 I 820 Brevard Avenue, Rocl�ledge, Florida 32955 (321) 638-0808 Fax (321).638-0948. wUuw. UniversalEngineering. com FIGURES