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HomeMy WebLinkAboutSW6221202_Soils/Geotechnical Report_20221214REPORT OF SUBSURFACE EXPLORATION AND GEOTECHNICAL ENGINEERING SERVICES HOLIDAY INN & SUITES EASTOVER, CUMBERLAND COUNTY, NORTH CAROLINA TM PREPARED FOR: MR. P. SINGH SANDHU ALL TYPE CONSTRUCTION & MANAGEMENT, INC. 3229 S. COLLEGE ROAD WILMINGTON, NORTH CAROLINA 28412 ECS PROJECT NUMBER 33:3711 June 22, 2016 ECS CAROLINAS, 9 LLP "Setting the Standard for Service" Geotechnical • Construction Materials • Environmental • Facilities NC Registered Engineering Firm F-1078 June 22, 2016 Mr. P. Singh Sandhu All Type Construction & Management 3229 S. College Road Wilmington, NC 28412 RE: Report of Subsurface Exploration and Geotechnical Services Holiday Inn & Suites Eastover, Cumberland County, North Carolina ECS Project Number 33:3711 Dear Mr. Sandhu: As authorized by your acceptance of ECS Proposal 33:2770 dated May 16, 2016, ECS has completed the subsurface exploration and geotechnical services for the above -referenced project. This report presents the findings of our subsurface exploration and our evaluations, as well as recommendations, regarding geotechnical-related design and construction considerations for the site. Thank you for the opportunity to work with you on this project. We would also at this time like to express our interest in providing a project -specific field construction testing and observation services required during the construction phase of this project. Should you have questions or if we can be of further assistance, please contact us. Respectfully Submitted, ECS CAROLINAS, LLP Michael M. Ellis, El Staff Professional Winslow E. Goins, PE Principal Engineer NC PE License No. 033751 r '7S'i W *//22/1r6/•� 4+y 4 e i•l�j�S`�,N\ 726 Ramsey Street, Suite 3, Fayetteville, NC 28301 • T: 910-401-3288 • F: 910-323-0539 • www.ecslimited.com ECS Carolinas, LLP • ECS Florida, LLC • ECS Midwest, LLC • ECS Mid -Atlantic, LLC • ECS Southeast, LLC • ECS Texas, LLP TABLE OF CONTENTS 1.0 EXECUTIVE SUMMARY.......................................................................................................1 2.0 PROJECT OVERVIEW.........................................................................................................2 2.1 Project Information...........................................................................................................2 2.2 Scope of Work.................................................................................................................2 2.3 Purpose of Exploration.....................................................................................................2 3.0 EXPLORATION PROCEDURES..........................................................................................3 3.1 Subsurface Exploration Procedures.................................................................................3 3.2 Laboratory Testing Program............................................................................................3 4.0 SUBSURFACE EXPLORATION...........................................................................................4 4.1 Site Conditions.................................................................................................................4 4.2 Regional Geology............................................................................................................4 4.3 Soil Conditions.................................................................................................................4 4.4 Groundwater Conditions..................................................................................................5 4.5 Laboratory Test results....................................................................................................5 5.0 ANALYSIS AND RECOMMENDATIONS ..............................................................................6 5.1 Subgrade Preparation......................................................................................................6 5.2 Groundwater Control........................................................................................................6 5.3 Engineered Fill Placement...............................................................................................7 5.4 Foundations.....................................................................................................................8 5.5 Slab-on-Grade..............................................................................................................10 5.6 Pavement Design Considerations.................................................................................11 5.7 Site Drainage.................................................................................................................12 5.8 Construction Considerations..........................................................................................12 6.0 CLOSING...........................................................................................................................13 APPENDICES Appendix A Figures Appendix B Boring Logs Appendix C Laboratory Test Results Appendix D General Conditions Appendix E Procedures Regarding Field Logs, Laboratory Testing, and Samples Subsurface Exploration and Geotechnical Engineering Services June 22, 2016 Holiday Inn & Suites Eastover, Cumberland County, North Carolina ECS Project Number 33:3711 1.0 EXECUTIVE SUMMARY ECS Carolinas, LLP (ECS) has completed a subsurface exploration and geotechnical engineering services for the proposed site located in Eastover, Cumberland County, North Carolina. This summary should not be considered apart from the entire text of the report with all the qualifications and conditions mentioned herein. Once the site plans are developed, additional site -specific geotechnical exploration should be conducted. The soil test borings encountered organic topsoil at the initial ground surface with thicknesses of approximately 2 inches. Underlying the organic topsoil to approximately 10 feet, soils consisting of stiff to very stiff, fat clay (CH), very soft to very stiff, sandy lean clay (CL), very loose to dense, clayey and silty sand (SC, SM) were encountered in the borings. From 10 feet to termination depths ranging from about 15 to 20 feet, borings B-1 through B-6 typically encountered stiff, sandy lean clay (CL) and very loose to medium dense, clayey, silty, and clean sand (SC, SM, SP). The on -site sandy soils (SC, SM, SP) should be appropriate for use as backfill material for this project, provided their moisture contents are within the acceptable range outlined in this report. We anticipate that minor cuts and fills on the order of 3 feet or less will be incorporated into the development of the site, with greater fill depths being anticipated for existing ditches at the site. A perched groundwater condition may exist on the site and temporary groundwater control measures may be necessary on the perimeter of the site. Provided the site preparation recommendations in this report are followed, proposed lightly to moderately loaded structures (column loads up to 150 kips and wall loads up to 5 kips per foot) may be supported on conventional shallow foundations. For footings supported on firm natural soil materials or new -engineered fill materials over firm natural soils, an allowable bearing pressure of 2,000 pounds per square foot (psf) is recommended. In order to achieve adequate bearing and reduce the potential for post construction settlements of the structures, the loose/soft near -surface soils encountered in the vicinity of boring B-2 may require localized undercutting and replacement or other appropriate remedial activities if they exist at the foundation subgrade elevation in building areas. Aggregate pier systems and driven timber piles are alternative options that can be used for the foundation of the building instead of undercutting the soft soils. Further details describing the foundation options are provided in section 5.3 "Foundations Recommendations" of this report. Based on the boring data, site conditions are suitable for a typical slab -on -grade section. Therefore, we recommend supporting the floor slab as a slab -on -grade over existing natural soils and new compacted structural fill that are stable when proofrolled. Based on the boring data, site conditions are suitable for support of asphaltic or Portland cement concrete pavement sections according to the criteria outlined in this report. Based on the boring data, difficult excavations are not anticipated for shallow foundation or utility excavations. Report of Subsurface Exploration and Geotechnical Engineering Services June 22, 2016 Holiday Inn & Suites Eastover, Cumberland County, North Carolina ECS Project Number 33:3711 2.0 PROJECT OVERVIEW 2.1 Project Information The project consists of the construction of a multi -story hotel along with associated parking and driveways. The site is located near the intersection of Pembroke Lane and Goldsboro Road in Eastover, Cumberland County, North Carolina. No additional project information including structural information was available at the time of this report. 2.2 Scope of Work The site was explored by drilling eight soil test borings (Borings B-1 through B-8) and sampling the soils to termination and refusal depths ranging from approximately 10 to 20 feet below existing site grades. The boring locations were located in the field by ECS personnel using handheld GPS equipment and existing site features as reference. The locations shown should be considered approximate given the methods used. A Site Location Plan and Boring Location Diagram are provided in Appendix A of this report. 2.3 Purposes of Exploration The purpose of this exploration program was to determine the soil and groundwater conditions at the site and to develop engineering recommendations to assist in the design and construction of the proposed project. We accomplished these objectives as follows: • Performing a site reconnaissance to evaluate the existing site conditions, • Performing soil test borings to explore the subsurface soil and groundwater conditions, • Performing laboratory tests on selected representative soil samples from the borings to evaluate pertinent engineering properties; and, • Analyzing the field and laboratory data to develop appropriate geotechnical engineering design and construction recommendations. Report of Subsurface Exploration and Geotechnical Engineering Services June 22, 2016 Holiday Inn & Suites Eastover, Cumberland County, North Carolina ECS Project Number 33:3711 3.0 FIELD EXPLORATION 3.1 Exploration Procedures The soil borings were performed with a drill rig, which utilized hollow stem augers (HSA) to advance the boreholes. Representative soil samples were obtained by means of the split -barrel sampling procedure in general accordance with ASTM Specification D-1586. In this procedure, a 2-inch O. D. split - barrel sampler is driven into the soil a distance of 18 inches by a 140 pound hammer with a free fall of 30 inches. The number of blows required to drive the sampler through the final 12-inch interval is termed the Standard Penetration Test (SPT) N-value and is indicated for each sample on the boring logs. The SPT N-value can be used to provide a qualitative indication of the in -place relative density of cohesionless soils. In a less reliable way, SPT N-values provide an indication of consistency for cohesive soils. These indications of relative density and consistency are qualitative, since many factors can significantly affect the SPT N-value and prevent a direct correlation between drill crews, drill rigs, drilling procedures, and hammer -rod -sampler assemblies. Field logs of the soils encountered in the borings were maintained by the drill crew. The soil samples obtained from the drilling operations were sealed in containers and were brought to ECS' laboratory for visual classification. 3.2 Laboratory Testing Program Representative soil samples obtained during our field exploration were selected and tested in our laboratory to check field classifications and to determine pertinent engineering properties. The laboratory testing program included: • visual classifications of soil according to ASTM D 2487; index property testing included natural moisture content determinations (ASTM D 2216), grain size analyses (ASTM D 1140), and Atterberg Limits (ASTM D 4318). Data obtained from the laboratory tests are included on the Laboratory Testing Summary and in Appendix C of this report. Report of Subsurface Exploration and Geotechnical Engineering Services June 22, 2016 Holiday Inn & Suites Eastover, Cumberland County, North Carolina ECS Project Number 33:3711 4.0 SUBSURFACE EXPLORATION 4.1 Site Conditions The site is located near the intersection of Pembroke Lane and Goldsboro Road in Eastover, Cumberland County, North Carolina. The site is relatively level, cleared to moderately wooded, and slopes upward from west to east with approximate site elevations ranging from 128 to 134 feet. 4.2 Site Geology The site is located in the Coastal Plain Physiographic Province of North Carolina. The Coastal Plain is composed of seven terraces, each representing a former level of the Atlantic Ocean. Soils in this area generally consist of sedimentary materials transported from other areas by the ocean or rivers. These deposits vary in thickness from a thin veneer along the western edge of the region to more than 10,000 feet near the coast. The sedimentary deposits of the Coastal Plain rest upon consolidated rocks similar to those underlying the Piedmont and Mountain Physiographic Provinces. In general, shallow unconfined groundwater movement within the overlying soils is largely controlled by topographic gradients. Recharge occurs primarily by infiltration along higher elevations and typically discharges into streams or other surface water bodies. The elevation of the shallow water table is transient and can vary greatly with seasonal fluctuations in precipitation. 4.3 Soil Conditions The soil conditions at each boring location are noted on the individual boring logs presented in Appendix B. A general description is provided below and a summary of the soil stratigraphy is shown on the Generalized Subsurface Profile in Appendix A. Subsurface conditions should be expected to vary between boring locations. The soil test borings encountered organic topsoil at the initial ground surface with thicknesses of approximately 2 inches. The topsoil thicknesses reported on the logs was based on driller observations and should be considered approximate. It should be noted that topsoil depths are expected to vary throughout the site. Underlying the organic topsoil to approximately 10 feet, soils consisting of stiff to very stiff, fat clay (CH), very soft to very stiff, sandy lean clay (CL), very loose to dense, clayey and silty sand (SC, SM) were encountered in the borings. The SPT resistance values (N-values) in the soils ranged from weight of hammer (W.O.H) to 37 blows per foot (bpf). From 10 feet to auger refusal depths ranging from about 15 to 20 feet, borings B-1 through B-6 typically encountered stiff, sandy lean clay (CL) and very loose to medium dense, clayey, silty, and clean sand (SC, SM, SP) with N-values ranging from 3 to 11 bpf. Report of Subsurface Exploration and Geotechnical Engineering Services June 22, 2016 4.4 Groundwater Groundwater was encountered at approximate depths ranging from 1 to 8 feet below existing grades at borings B-1, B-2, B-5, and B-6. At borings B-3, B-4, B-7, and B-8 groundwater was not encountered, however, cave in depths were observed to range from 6.5 to 8 feet. Cave in depths can sometimes be indicative of groundwater. Based on the groundwater measurements and our experience in the area, the groundwater readings are indicative of a perched water table. The highest groundwater observations are normally encountered in the late winter and early spring. Variations in the location of the long-term water table may occur as a result of changes in precipitation, evaporation, surface water runoff, and other factors not immediately apparent at the time of this exploration. Extended monitoring of the groundwater using wells would be required to determine the fluctuation of the groundwater level over time. 4.5 Laboratory Test Results The moisture contents in the tested samples ranged from 14.0 to 24.5 percent. In the tested samples, the percent passing the No. 200 sieve ranged from 21.1 to 48.0 percent. The Atterberg Limit tests resulted in liquid limits (LL) ranging from 40 to 56 and plastic limits (PL) ranging from 20 to 25 in the tested samples, respectively. Specific laboratory test results are provided in Appendix C of this report. Report of Subsurface Exploration and Geotechnical Engineering Services June 22, 2016 Holiday Inn & Suites Eastover, Cumberland County, North Carolina ECS Project Number 33:3711 5.0 PRELIMINARY ANALYSIS AND RECOMMENDATIONS The following preliminary design and construction recommendations are based on our above - stated understanding of the proposed potential development and on the data obtained from the field exploration, visual soil classification, and laboratory results. The following preliminary recommendations are for preliminary design purposes. Once preliminary structural loading, geometry, and location of the structure are developed, we request the opportunity to review our recommendations in light of the new information and revise them as necessary. 5.1 Subgrade Preparation The first step in preparing the site for the proposed construction should be to remove vegetation, rootmat, topsoil, debris, deleterious materials and other soft or unsuitable materials from the existing ground surface. These operations should extend at least 10 feet, where possible, beyond the planned limits of the proposed structures and pavements. The exposed subgrade soils in structural and pavement areas should be proofrolled using a loaded dump truck, prior to placing any new fill to raise the grade. The subgrade soils in cut areas should also be proofrolled. The loaded dump truck should have an axle weight of at least 10 tons. Proofrolling should be observed by an experienced geotechnical engineer, or their personnel, at the time of construction to aid in identifying areas with soft or unsuitable materials. Soft or unsuitable materials encountered during proofrolling should be removed and replaced with an approved backfill compacted to the criteria given in Section 5.3 Fill Placement and Soil Compaction. Undercutting should be anticipated due to the presence of soft clays/loose sands in the upper three feet. Site subgrade conditions will be significantly influenced by weather conditions. Subgrades that are evaluated after periods of rainfall will not respond as well to proofrolling as subgrades that are evaluated after periods of more favorable weather. We strongly recommend that rubber tire equipment not be used if subgrade conditions exhibit elevated moisture conditions. The contractor should use tracked equipment to minimize the degradation of marginally stable subgrades. The preparation of fill subgrades, as well as proposed building subgrades, should be observed on a full-time basis by ECS personnel. These observations should be performed by a geotechnical engineer, or his representative, to ensure that the unsuitable materials have been removed and that the prepared subgrade is suitable for support of the proposed construction and/or fills. 5.2 Groundwater Control Temporary groundwater control measures may be necessary around the perimeter of the building pad and pavement areas to address the perched groundwater condition. Groundwater control is the purposeful drawdown of groundwater below subgrades, foundations, slabs, or pavements to facilitate construction and to mitigate long term problems associated with groundwater. It is the contractor's responsibility to plan for and budget for temporary groundwater control. The means and methods of lowering the groundwater are at the contractor's discretion. Temporary groundwater control measures typically consist of gravity ditches, well points, sump pumps, pumping from gravel lined and cased sumps, or other Report of Subsurface Exploration and Geotechnical Engineering Services June 22, 2016 Holiday Inn & Suites Eastover, Cumberland County, North Carolina ECS Project Number 33:3711 suitable methods. Whatever method used, the groundwater control should be in place and operating continuously (around the clock) to achieve and maintain the desired drawdown in advance of excavation, proofrolling, compaction or other construction. Permanent groundwater control measures typically consist of French drain systems and/or permanent sumps/pumps. 5.3 Engineered Fill Placement Following the removal of deleterious surface and subsurface materials, and after achieving a stable subgrade, engineered fills can be placed and compacted to achieve the desired site grades. Fill for support of the proposed construction and for backfill of utility lines within expanded building and pavement limits should consist of an approved material, free of organic matter and debris and cobbles greater than 3 inches, and have a Liquid Limit (LL) and Plasticity Index (PI) less than 40 and 20, respectively. We also recommend that fills within structural areas have a modified Proctor (ASTM D 1557) maximum dry density of at least 100 pounds per cubic foot (pcf). Unsuitable fill materials include topsoil, organic materials (OH, OL), and high plasticity clays and silts (CH, MH). Such materials removed during grading operations should be either stockpiled for later use in landscape fills, or placed in approved on or off -site disposal areas. Existing soils containing significant amounts of organic matter will not be suitable for re -use as engineered fill. As such, the organic content of the near surface soils should be evaluated to determine if some of these soils will be suitable for re -use as engineered fill. Natural fine- grained soils classified as clays or silts (CL, ML) with LL and PI greater than 40 and 20, respectively, should be evaluated by the geotechnical engineer at the time of construction to determine their suitability for use as engineered fill. Prior to the commencement of fill operations and/or utilization of any off -site borrow materials, the contractor should provide representative samples of the proposed fill soils to the geotechnical engineer. The geotechnical engineer can determine the material's suitability for use as an engineered fill and develop moisture -density relationships in accordance with the recommendations provided herein. Samples should be provided to the geotechnical engineer at least 3 to 5 days prior to their use in the field to allow for the appropriate laboratory testing to be performed. Fill materials placed within the building and pavement areas should be placed in lifts not exceeding 8 inches in loose lift thickness and moisture conditioned to within their working range of optimum moisture content. The fills should then be compacted to a minimum of 95 percent of the soil's modified Proctor (ASTM D 1577) maximum dry density. The typical working range of optimum moisture for the natural Coastal Plain soils at the site is expected to be within approximately 3 percent of the optimum moisture content. Care should also be taken to provide a smooth, gently sloping ground surface at the end of each day's earthwork activities to help reduce the potential for ponding and absorption of surface water. Grade controls should also be maintained throughout the filling operations. Filling operations should be observed on a full-time basis by a qualified representative of ECS to determine that the required degrees of compaction are being achieved. We recommend that a minimum of one compaction test per 2,500-square-foot area be performed for each lift of controlled fill. Within trench or other localized excavations at least one test shall be performed for each 200 7 Report of Subsurface Exploration and Geotechnical Engineering Services June 22, 2016 Holiday Inn & Suites Eastover, Cumberland County, North Carolina ECS Project Number 33:3711 linear feet of each lift of fill. The elevation and location of the tests should be clearly identified at the time of fill placement. Areas which fail to achieve the required degree of compaction should be re -worked until the specified degree of compaction is achieved. Failing test areas may require moisture adjustments or other suitable remedial activities in order to achieve the required compaction. Fill materials should not be placed on frozen, frost -heaved, and/or soils which have been recently subjected to precipitation. Wet or frozen soils should be removed prior to the continuation of site grading and fill placement. Borrow fill materials, if required, should not contain excessively wet or frozen materials at the time of placement. Additionally, if grading operations occur during the winter months, frost -heaved soils should be removed prior to placement of engineered fill, granular sub -base materials, foundation or slab concrete, and asphalt pavement materials. If problems are encountered during the site grading operations, or if the actual site conditions differ from those encountered during our subsurface exploration, the geotechnical engineer should be notified immediately. 5.4 Foundations Shallow Foundations- Provided that the subgrade preparation and earthwork operations are completed in strict accordance with the recommendations of this report, the proposed residential structures can be supported on conventional shallow foundations bearing on approved natural materials and/or properly compacted fill. We recommend a maximum net allowable design soil bearing pressure of 2,000 psf for proportioning shallow foundations. To reduce the possibility of foundation bearing failure and excessive settlement due to local shear or "punching" failures, we recommend that continuous footings have a minimum width of 18 inches and that isolated column footings have a minimum lateral dimension of 30 inches. Furthermore, footings should bear at a depth to provide adequate frost cover protection. For this region, we recommend the bearing elevation be a minimum depth of 18 inches below the finished exterior grade or in accordance with the local building code requirements. Undercutting of up to 8 feet may be required in the vicinity of Boring B-2 due to the presence of very loose/very soft soils. Once structural loads and site grades are finalized, ECS requests the opportunity to review and revise our recommendations, if necessary. The settlement of a structure is a function of the compressibility of the bearing materials, bearing pressure, actual structural loads, fill depths, and the bearing elevation of footings with respect to the final ground surface elevation. Estimates of settlement for foundations bearing on engineered or non -engineered fills are strongly dependent on the quality of fill placed. Factors which may affect the quality of fill include maximum loose lift thickness of the fills placed and the amount of compactive effort placed on each lift. Provided that the recommendations outlined in this report are strictly adhered to, we expect that total settlements for the proposed construction are expected to be in the range of 1 inch or less, while the differential settlement will be approximately'/2 of the anticipated total settlement. This analysis is based on our engineering experience and assumed structural loadings for this type of structure, and is intended to aid the structural engineer with his design. Report of Subsurface Exploration and Geotechnical Engineering Services June 22, 2016 Holiday Inn & Suites Eastover, Cumberland County, North Carolina ECS Project Number 33:3711 The net allowable soil bearing pressure refers to that pressure which may be transmitted to the foundation bearing soils in excess of the final minimum surrounding overburden pressure. The final footing elevation should be evaluated by ECS personnel to verify that the bearing soils are capable of supporting the recommended net allowable bearing pressure and suitable for foundation construction. These evaluations should include visual observations, hand rod probing, and dynamic cone penetrometer (ASTM STP 399) testing, or other methods deemed appropriate by the geotechnical engineer at the time of construction. If unsuitable materials are encountered at the base of a foundation excavation, it will be necessary to lower the base of the footing through the unsuitable materials or to undercut the unsuitable soils and to restore original bearing levels by placing compacted engineered fill materials, compacted graded aggregate base, No. 57 stone, or concrete. These evaluations should be performed within each column footing excavation and at intervals not greater than 50 feet in continuous footing excavations. Exposure to the environment may weaken the soils at the foundation bearing level if the foundation excavations remain exposed during periods of inclement weather. This is especially true for the fine-grained soils at the site. Therefore, foundation concrete should be placed the same day that proper excavation is achieved and the design bearing pressure is verified. If the bearing soils are softened by surface water absorption or exposure to the environment, the softened soils must be removed from the foundation excavation bottom immediately prior to placement of concrete. If the foundation excavation must remain open overnight, or if rainfall is imminent while the bearing soils are exposed, we recommend that a 2 to 3-inch thick "mud mat" of "lean" concrete be placed over the exposed bearing soils before the placement of reinforcing steel. Aggregate Pier System: A ground improvement system, such as an aggregate pier system combined with conventional shallow foundations can be utilized to support the proposed structure. An aggregate pier system is a ground improvement method used to improve shallow to intermediate, soft clay, loose silt, and loose sand soil for support of shallow foundations. Aggregate piers improve soft soil and fill by vibration, compaction, and ramming of thin lifts of crushed rock into a drilled hole. Soft soil is removed from the ground and then very dense, high quality crushed rock is compacted into the drilled hole which expands the hole into the adjacent soil. The cavity expansion effects increase the strength and stiffness of adjacent soil. The compaction and ramming of thin lifts of crushed rock increases the strength and stiffness, increases soil bearing capacity, and reduces soil compressibility. Aggregate piers can allow the soil to support heavier loads on conventional shallow spread and strip footings with reduced settlement. If an aggregate pier system is selected for support of foundations, we recommend that the following issues be considered prior to construction: • Specifications for the aggregate pier system for support of foundations should be prepared by a qualified specialty contractor. One demonstration pier should be installed with the aggregate pier installer's standard procedures and then load -tested to determine the modulus. The load testing setup and procedures should be selected by the aggregate pier installer and submitted for review to the project geotechnical engineers. The demonstration pier should be installed at the foundation grade level. Report of Subsurface Exploration and Geotechnical Engineering Services June 22, 2016 Holiday Inn & Suites Eastover, Cumberland County, North Carolina ECS Project Number 33:3711 The aggregate pier element installation operations should be conducted under the continuous observation of the geotechnical engineer's representative. This observation is conducted to reduce the potential for short aggregate pier element installations and excessive aggregate lift thicknesses. Driven Timber Piles: The structure can be supported on a deep foundation system consisting of driven timber piles. The allowable capacities and embedment depths for an 8-inch square timber pile are presented in the summary table below. Embedment Depth (ft) Axial (kips) Uplift (kips) Lateral (kips) 13-15 20 2 1 Pile capacity analyses were performed assuming a free head condition and the provided compression and tension capacities are based on a factor of safety of 2.0 and 3.0, respectively. We recommend that the pile driving hammer used to install each timber pile have a minimum rated energy blow of 8,000 foot-pounds. Driving criteria and bearing elevations should be established prior to driving piles. It is suggested that several over length piles be driven prior to the start of production pile driving, to establish the driving criteria, pile lengths to be ordered and to determine if auger "pilot' holes are justified. Production piles should not be ordered until the pile lengths can be determined. A minimum of two over length piles are recommended for the structure. The over length piles could be driven in production pile locations. Pile installation operations and load tests, if necessary, should be monitored by a senior soil technician working under the supervision of a Licensed Engineer. ECS would be pleased to develop driving criteria for the project, once the method of installation and the contractor has been selected. 5.5 Slabs -on -Grade Slabs -on -grade can be adequately supported on undisturbed, low -plasticity soils or on newly - placed engineered fill provided the site preparation and fill recommendations outlined herein are implemented. For a properly prepared site, a modulus of subgrade reaction (ks) for the soil of 150 pounds per cubic inch for the soil can be used. This value is representative of a 1-ft square loaded area and may need to be adjusted depending on the size and shape of the loaded area depending on the method of structural analysis. We recommend the slabs -on -grade be underlain by a minimum of 4 inches of granular material having a maximum aggregate size of 1'/2 inches and no more than 2 percent fines. Prior to placing the granular material, the floor subgrade soil should be properly compacted, proofrolled, and free of standing water, mud, and frozen soil. A properly designed and constructed capillary break layer can often eliminate the need for a moisture retarder and can assist in more uniform curing of concrete. If a vapor retarder is considered to provide additional moisture protection, special attention should be given to the surface curing of the slabs to minimize uneven drying of `us Report of Subsurface Exploration and Geotechnical Engineering Services June 22, 2016 Holiday Inn & Suites Eastover, Cumberland County, North Carolina ECS Project Number 33:3711 the slabs and associated cracking and/or slab curling. The use of a blotter or cushion layer above the vapor retarder can also be considered for project specific reasons. Please refer to ACI 302.1 R96 Guide for Concrete Floor and Slab Construction and ASTM E 1643 Standard Practice for Installation of Water Vapor Retarders Used in Contact with Earth or Granular Fill under Concrete Slabs for additional guidance on this issue. In order to minimize the crack width of shrinkage cracks that may develop near the surface of the slab, we recommend mesh reinforcement as a minimum be included in the design of the floor slab. For maximum effectiveness, temperature and shrinkage reinforcements in slabs on ground should be positioned in the upper third of the slab thickness. The Wire Reinforcement Institute recommends the mesh reinforcement be placed within 2 inches below the slab surface or within upper one-third of slab thickness, whichever is closer to the surface. Adequate construction joints, contraction joints and isolation joints should also be provided in the slab to reduce the impacts of cracking and shrinkage. Please refer to ACI 302.1 R96 Guide for Concrete Floor and Slab Construction for additional information regarding concrete slab joint design. 5.6 Pavement Design Considerations For the design and construction of exterior pavements, the subgrades should be prepared in strict accordance with the recommendations in the "Subgrade Preparation" and "Engineered Fill Placement" sections of this report. An important consideration with the design and construction of pavements is surface and subsurface drainage. Where standing water develops, either on the pavement surface or within the base course layer, softening of the subgrade and other problems related to the deterioration of the pavement can be expected. Furthermore, good drainage should minimize the possibility of the subgrade materials becoming saturated during the normal service period of the pavement. Actual traffic conditions were not provided to ECS. However, based on our experience for light duty traffic for similar projects, a light duty flexible pavement section may consist of 2 inches of surface SF9.5 mix overlying at least 6 inches of compacted ABC stone in the parking and drive aisle areas. Similarly, a heavy duty flexible pavement section may consist of 3 inches of surface SF9.5 mix overlying at least 8 inches of compacted graded aggregate base in the roadway areas. For a rigid pavement section, we recommend 6 inches of 450 psi flexible strength concrete overlying at least 6 inches of compacted ABC stone in the roadway areas. Regardless of the section and type of construction utilized, saturation of the subgrade materials and asphalt pavement areas results in a softening of the subgrade material and shortened life span for the pavement. Therefore, we recommend that both the surface and subsurface materials for the pavement be properly graded to enhance surface and subgrade drainage. By quickly removing surface and subsurface water, softening of the subgrade can be reduced and the performance of the parking area can be improved. Site preparation for the parking areas should be similar to that for the building area including stripping, proofrolling, and the placement of compacted structural fill. Please note that large, front -loading trash dumpsters frequently impose concentrated front - wheel loads on pavements during loading. This type of loading typically results in rutting of M Report of Subsurface Exploration and Geotechnical Engineering Services June 22, 2016 Holiday Inn & Suites Eastover, Cumberland County, North Carolina ECS Project Number 33:3711 bituminous pavements and ultimately pavement failures and costly repairs. Consequently, we recommend the use of an 8 inch thick, mesh reinforced concrete slab that extends the entire length of the truck. Concrete pavements should be properly jointed and reinforced as needed to help reduce the potential for cracking and to permit proper load transfer. 5.7 Site Drainage Positive drainage should be provided around the perimeter of the pavement to minimize the potential for moisture infiltration into the subgrade soils. We recommend that landscaped areas adjacent to the pavements be sloped away from the construction and maintain a fall of at least 6 inches for the first 10 feet outward from the structure. The parking lots, sidewalks, and other paved areas should also be sloped to divert surface water away from the proposed pavement. The proper diversion of surface water during site grading and construction will help reduce the potential for delays associated with periods of inclement weather. The proper diversion of surface water is especially critical since portions of the site soils are expected to be moisture sensitive. Based upon our past experience, the use of "crowning" large areas of exposed soils should be useful to help divert surface water from the prepared subgrades. 5.8 Construction Considerations It is imperative to maintain good site drainage during earthwork operations to help maintain the integrity of the surface soils. The surface of the site should be kept properly graded to enhance drainage of surface water away from the proposed construction areas during the earthwork phase of this project. We recommend that surface drainage be diverted away from the proposed pavements areas without significantly interrupting its flow. Other practices would involve crowning and sealing the exposed soils daily with a smooth -drum roller at the end of the day's work to reduce the potential for infiltration of surface water into the exposed soils. The key to minimizing disturbance problems with the soils is to have proper control of the earthwork operations. Specifically, it should be the earthwork contractor's responsibility to maintain the site soils within a workable moisture content range to obtain the required in -place density and maintain a stable subgrade. Scarifying and drying operations should be included in the contractor's price and not be considered an extra to the contract. In addition, construction equipment cannot be permitted to randomly travel across the site, especially once the desired final grades have been established. Construction equipment should be limited to designated lanes and areas, especially during wet periods to minimize disturbance of the site subgrades. It will likely be necessary to utilize tracked equipment during grading operations particularly if the subgrade soils exhibit elevated moisture conditions. 12 Report of Subsurface Exploration and Geotechnical Engineering Services June 22, 2016 Holiday Inn & Suites Eastover, Cumberland County, North Carolina ECS Project Number 33:3711 6.0 CLOSING Our geotechnical analysis of the site has been based on our understanding of the site, the project information provided to us, and the data obtained during our exploration. The general subsurface conditions utilized in our analyses have been based on interpolation of subsurface data between the borings. If the project information provided to us is changed, please contact us so that our recommendations can be reviewed and appropriate revisions provided, if necessary. The discovery of any site or subsurface conditions during construction which deviate from the data outlined in this exploration should be reported to us for our review, analysis and revision of our recommendations, if necessary. The assessment of site environmental conditions for the presence of pollutants in the soil and groundwater of the site is beyond the scope of this geotechnical exploration. 13 APPENDIX A FIGURES ■ I �'; - . 0 �. 1 1 •dkh 4p *• VL APPROXIMATE SITE LOCATION ITEVICI VICINITY MAP _ Holit#a Inn Suites WEE errs .-CEnMME MO- 33.3711 Source: Coogle Maps Eastover, North Carolina 1 DATE fi1200)1 fi WE NO. r 0 0 00 Z ;u v_z G? G? ASSHOWN 4 1 -omo- DENOTES APPROXIMATE 60TT2�16 LDDATIDN ill= DIL TETBORIN . r Am, ILU� Arm 16 fift6 imb-- SOIL CLASSIFICATION LEGEND ST- SHELBY WOE 0.L-ROCK LORE PM - PRESSURE METER .-FIlL .-POSSIBLE FILL .-PROBABLE FILL SURFACE MATERIALS ROCK TYPES SYMBOL LEGEND WATER LEVEL DURING DRILLING/SAMPLING %GW-WEU.-DEDGRAVEL ®GO-CLAYEYGRAVEL ®0.- LOW PLASTICITY RAY SP- POORLY GRADED SAND ®OH -HIGH PLASTICITY ORGANIC B.-AND CLAYS ®WR - WEATHERED ROCK �DO-DECOMPOSED ROCK TO- CONCRETE IGNEOUS V WATER LEVEL- SEASONAL, HIGH WATER GM - SILTY GRAVEL Ej SW -WELL GRADED SAND ® MH- HIGH PLASTICITY 5ILT SL-0.AYEY SAND ® OL- LOW PLASTICITY ORGANIC SILTS AND-- Fq PWR- PARTIALLY WEATHERED ROOK . ASPHALT ❑ VOID ❑ METAMORPHIC N6P4OORLY6RADEDGRAVEL ®ML-LOWPLASTICITYSILT SM -SILTY SAND ®CN-HIGH PLASTICITY-1 PT -PEAT ElNWR-HIGHLY WEATHERED ROCK 0GRAVEL ❑SEDIMENTARYWATER WATER LEVEL AFTER CASING REMOVAL LEVEL AMR 24 HOURS B-1 B-2 B-3 B-4 B-5 B-6 0 0 5- 10- Ol LL E s a d Q 15- Termir 20 - 25 - 9 0 rn' 13Z 5 6�Ax 11 ;; SM — - Sc CL CL 9 CL 0 21 25 33 17 Sc 11 0 13 . : , 28 13 16 CL Sc CL 5 5 9 13 • .'.: 12 ...:. 12 SM SP 5 6 6 12 :: 11 7 ' CL ted due to heaving szTerminated due to heaving sand SM SM @ 15' @ 15' Sc 3 4 3 6 Terminated due to heaving szTerminated due to heaving szTerminated due to heaving szTerminated due to heaving sand @ 20' @ 20' @ 20' @ 20' :, GENERALIZED SUBSURFACE SOIL PROFILE -5 -10 - 20 - 25 SOIL CLASSIFICATION LEGEND ST- SHELBY WOE ®0.- LOW PLASTICITY RAY 0.C-ROCK CORE SP- POORLY GRADED SAND PM - PRESSURE METER .-FIlL ®OH -HIGH PLASTICITY ORGANIC B.-AND CLAYS ®WR .-POSSIBLE FILL - WEATHERED ROCK .-PROBABLE FILL �DO- DECOMPOSED ROCK SURFACE MATERIALS ROCK TYPES SYMBOL LEGEND Q WATER LEVEL DURING DRILLING/SAMPLING V WATER LEVEL- SEASONAL, HIGH WATER TO- CONCRETE %GW-WEU.-DEDGRAVEL ®GO-CLAYEYGRAVEL IGNEOUS GM - SILTY GRAVEL N6P4OORLY6RADEDGRAVEL Ej SW -WELL GRADED SAND ®ML-LOWPLASTICITYSILT ® MH- HIGH PLASTICITY 5ILT SM-SILTY SAND SL-0.AYEY SAND ® CN HIGH PLASTICITY-1 ® OL- LOW PLASTICITY ORGANIC SILTS AND-- PT -PEAT Fq ElNWR-HIGHLY PWR- PARTIALLY WEATHERED ROOK WEATHERED ROCK . ASPHALT GRAVEL ❑ VOID ❑ METAMORPHIC SEDIMENTARY V_ WATER LEVEL AFTER CASING REMOVAL WATER LEVEL -AFTER 24 HOURS o B-7 B-8 5- 30- Ol LL E s m d Q 15- 20 - 25 - 6 15 CL CL SC 26 28 15 16 CH 37 :: SM 11 END OF BORING END OF BORING @ 10' @ 10' NOTES: 1 SEE INDIVIDUAL BORING LOG AND GEOTECHNICAL REPORT FOR ADDITIONAL INFORMATION. 2 PENETRATION TEST RESISTANCE IN BLOWS PER FOOT (ASTM 01586). , GENERALIZED SUBSURFACE SOIL PROFILE -0 -5 -10 - 20 - 25 APPENDIX B BORING LOGS UNIFIED SOIL CLASSIFICATION SYSTEM (ASTM D 2487) Major Divisions Group Symbols Typical Names Laboratory Classification Criteria Well -graded gravels, gravel- w w GW sand mixtures, little or no fines o Cu = D60/D10 greater than 4 N _ C� = (D30)2/(D1oxD60) between 1 and 3 w m o � o N Poorly graded gravels, gravel- 0 m `O dj 0 m .N °' °' ' GP sand mixtures, little or no fines .5 Not meeting all gradation requirements for GW fn U m a� > U 0) d) U N ;n N ; ° d 0 C.) m o b O w , in e GMa Silty gravels, gravel -sand .N Atterberg limits below "A" line 00 E mixtures or P.I. less than 4 Above "A" line with P.I. N .3 a� u .N between 4 and 7 are o p o 9w borderline cases requiring zs w g ( N �° use of dual symbols GC Clayey gravels, gravel -sand- Atterberg limits below "A" line — m Q 6 E > w °' clay mixtures � or P.I. less than 7 c (D .m u, c SW Well -graded sands, gravelly CU E D Cu = D60/D10 greater than 6 a� c sands, little or no fines C� = (D30)z/(D1oxD6o) between 1 and 3 O N U E N (6 O w c i d CU.o UU U SP Poorly graded sands, gravelly meeting all gradation requirements for SW O N O (n N O C.)Not . sands, little or no fines Cn a v O � N _ O -6 � N � 'O U c O o d (D (D O (D m m z U w c w c o SMa Silty sands, sand -silt mixtures c Atterberg limits above "A" line c E Q 2 o C.)P or P.I. less than 4 Limits plotting in CL-ML (0 a� a u o a5 N c w zone with P.I. between 4 w c-N (DE �_ o w Lo i and 7 are borderline cases c `o- rn c Q requiring use of dual in ` c :w �� N symbols FSC Clayey sands, sand -clay Q w N o Atterberg limits above "A" line mixtures 0 0 ° J with P.I. greater than 7 Inorganic silts and very fine ML sands, rock flour, silty or Plasticity Chart w clayey fine sands, or clayey o Y silts with slight plasticity Inorganic clays of low to " " 60 CL medium plasticity, gravelly Nclays, sandy clays, silty clays, "A" line lean clays 50 Organic silts and organic silty z° v OL clays of low plasticity 40 CH Inorganic silts, micaceous or N a� � CL E MH diatomaceous fine sandy or 30 U silty soils, elastic silts (6 fn tl! CU 5 y �p o °3 �C 20 H and OH m c CH Inorganic clays of high E m ° plasticity, fat clays 10 U) CL- L OH Organic clays of medium to 0 L an I OL high plasticity, organic silts 0 10 20 30 40 50 60 70 80 90 100 c .N rn w Pt Peat and other highly organic Liquid Limit = O soils a Division of GM and SM groups into subdivisions of d and u are for roads and airfields only. Subdivision is based on Atterberg limits; suffix d used when L.L. is 28 or less and the P.I. is 6 or less; the suffix u used when L.L. is greater than 28. b Borderline classifications, used for soils possessing characteristics of two groups, are designated by combinations of group symbols. For example: GW- GC,well-graded gravel -sand mixture with clay binder. (From Table 2.16 - Winterkorn and Fang, 1975) REFERENCE NOTES FOR BORING LOGS Drilling Sampling Symbols SS Split Spoon Sampler ST Shelby Tube Sampler RC Rock Core, NX, BX, AX PM Pressuremeter DC Dutch Cone Penetrometer RD Rock Bit Drilling BS Bulk Sample of Cuttings PA Power Auger (no sample) HSA Hollow Stem Auger WS Wash sample REC Rock Sample Recovery % RQD Rock Quality Designation % Correlation of Penetration Resistances to Soil Properties Standard Penetration (blows/ft) refers to the blows per foot of a 140 lb. hammer falling 30 inches on a 2-inch OD split -spoon sampler, as specified in ASTM D 1586. The blow count is commonly referred to as the N-value. A. Non -Cohesive Soils (Silt, Sand, Gravel and Combinations) Density Relative Properties 0 to 4 blows/ft Very Loose Adjective Form 12% to 49% 5 to 10 blows/ft Loose With 5% to 12% 11 to 30 blows/ft Medium Dense 31 to 50 blows/ft Dense Over 51 blows/ft Very Dense Particle Size Identification Boulders 12 inches or larger Cobbles 3 inches to 12 inches Gravel Coarse 3/4 inch to 3 inches Fine 4.75 mm to 3/4 inch Sand Coarse 2.00 mm to 4.75 mm Medium 0.425 mm to 2.00 mm Fine 0.075 mm to 0.425 mm Silt and Clay Less than 0.075 mm B. Cohesive Soils (Clay, Silt, and Combinations) Unconfined Degree of Plasticity Blows/ft Consistency Comp. Strength Plasticity Index Qp (ts0 0 to 2 Very Soft Under 0.25 None to slight 0-4 3 to 4 Soft 0.25-0.49 Slight 5-7 5 to 8 Medium Stiff 0.50-0.99 Medium 8 — 22 9 to 15 Stiff 1.00-1.99 High to Very High Over 22 16 to 30 Very Stiff 2.00-3.99 31 to 50 Hard 4.00-8.00 Over 50 Very Hard Over 8.00 Water Level Measurement Symbols WL Water Level BCR Before Casing Removal DCI Dry Cave -In WS While Sampling ACR After Casing Removal WCI Wet Cave -In WD While Drilling 0 Groundwater Level at Time of Drilling 8 GWT Day After Drilling The water levels are those levels actually measured in the borehole at the times indicated by the symbol. The measurements are relatively reliable when augering, without adding fluids, in a granular soil. In clay and plastic silts, the accurate determination of water levels may require several days for the water level to stabilize. In such cases, additional methods of measurement are generally applied. CLIENT JOB # BORING # SHEET All Type Construction & Manaciement, Inc. 3711 13-1 1 OF 1 �- ROCK QUALITY DESIGNATION & RECOVERY NORTHING EASTING STATION ROD% - — - REC% PLASTIC WATER LIQUID z DESCRIPTION OF MATERIAL ENGLISH UNITS " z U LL LIMIT% CONTENT% LIMIT% w IL BOTTOM OF CASING LOSS OF CIRCULATION U w u n LL o J O O SURFACE ELEVATION = J IL J IL J IL LU i OU CC H w 3O ® STANDARD PENETRATION IL o U) U) U) ¢ w m BLOWS/FT D To soil Depth 2.00" (CL) SILTY LEAN CLAY, Red/Gray/Tan, Wet, 2 S-1 SS 18 18 Stiff 4 9 5 4 S-2 SS 18 18 4 9 5 5 3 S-3 SS 18 18 4 11 7 (SM) SILTY FINE TO MEDIUM SAND, Orange/ S4 SS 18 18 Tan, Saturated, Loose 2 3 5 10 2 3 S-5 SS 18 18 2 5 15 3 AUGER REFUSAL @ 15' 20 25 30 THE STRATIFICATION LINES REPRESENT THE APPROXIMATE BOUNDARY LINES BETWEEN SOIL TYPES. IN -SITU THE TRANSITION MAY BE GRADUAL. 4 WL 2.5 WS❑ WDO BORING STARTED 06/07/16 CAVE IN DEPTH @ 6,0' WL(SHW) 1 WL(ACR) BORING COMPLETED 06/07/16 HAMMER TYPE Auto WL RIG ATV FOREMAN Jake DRILLING METHOD HSA CLIENT JOB # BORING # SHEET All Type Construction & Manaciement, Inc. 3711 13-2 1 OF 1 �- PROJECT NAME ARCHITECT -ENGINEER ROCK QUALITY DESIGNATION & RECOVERY NORTHING EASTING STATION ROD% - — - REC% PLASTIC WATER LIQUID z DESCRIPTION OF MATERIAL ENGLISH UNITS z U LL LIMIT% CONTENT% LIMIT% w IL BOTTOM OF CASING LOSS OF CIRCULATION U w u n LL o J O O SURFACE ELEVATION = J IL J IL J IL LU i OU CC H w 3O ® STANDARD PENETRATION IL o U) U) U) ¢ w m BLOWS/FT D To soil Depth 2.00" (SC) CLAYEY FINE SAND, Dark Gray, = WOH S-1 SS 18 18 Saturated, Very Loose wo WOH WOH S 2 SS 18 18 wo 5 WOH (CL) SANDY LEAN CLAY, Tan/Light Gray/ S 3 SS 18 18 Orange, Saturated, Very Soft to Medium Stiff WO WOH WOH S-4 SS 18 18 2 5 10 3 (SP) MEDIUM SAND, Orange/Tan, Wet, Loose 4 S-5 SS 18 18 4 6 15 2 AUGER REFUSAL @ 15' 20 25 30 THE STRATIFICATION LINES REPRESENT THE APPROXIMATE BOUNDARY LINES BETWEEN SOIL TYPES. IN -SITU THE TRANSITION MAY BE GRADUAL. 4 WL 1 .0 WS❑ WDO BORING STARTED 06/07/16 CAVE IN DEPTH @ 4.5' WL(SHW) 1 WL(ACR) BORING COMPLETED 06/07/16 HAMMER TYPE Auto WL RIG ATV FOREMAN Jake DRILLING METHOD HSA CLIENT JOB # BORING # SHEET All Type Construction & Manaciement, Inc. 3711 13-3 1 OF 1 �- PROJECT NAME ARCHITECT -ENGINEER ROCK QUALITY DESIGNATION & RECOVERY NORTHING EASTING STATION ROD% - — - REC% PLASTIC WATER LIQUID z DESCRIPTION OF MATERIAL ENGLISH UNITS " z U LL LIMIT% CONTENT% LIMIT% w IL BOTTOM OF CASING LOSS OF CIRCULATION U w u n LL o J O O SURFACE ELEVATION = J IL J IL J IL LU i OU CC H w 3O ® STANDARD PENETRATION IL o U) U) U) ¢ w m BLOWS/FT D To soil Depth 2.00" (SC) CLAYEY FINE TO MEDIUM SAND, Tan/ 5 S-1 SS 18 18 Red/Orange, Moist to Saturated, Medium 5 1INN Dense to Very Loose — 8 15 S-2 SS 18 18 11 21 5 ix 10 S-3 SS 18 18 7 13 6 3 S-4 SS 18 18 4 9 10 5 2 S-5 SS 18 18 3 6 15 3 2 S-6 SS 18 18 1 3 i 20 2 AUGER REFUSAL @ 20' 25 30 THE STRATIFICATION LINES REPRESENT THE APPROXIMATE BOUNDARY LINES BETWEEN SOIL TYPES. IN -SITU THE TRANSITION MAY BE GRADUAL. 4 WL 2.0 WS❑ WDO BORING STARTED 06/07/16 CAVE IN DEPTH @ 6.5' WL(SHW) 1 WL(ACR) BORING COMPLETED 06/07/16 HAMMER TYPE Auto WL RIG ATV FOREMAN Jake DRILLING METHOD HSA CLIENT JOB # BORING # SHEET All Type Construction & Manaciement, Inc. 3711 13-4 1 OF 1 �- PROJECT NAME ARCHITECT -ENGINEER ROCK QUALITY DESIGNATION & RECOVERY NORTHING EASTING STATION ROD% - — - REC% PLASTIC WATER LIQUID z DESCRIPTION OF MATERIAL ENGLISH UNITS " z U LL LIMIT% CONTENT% LIMIT% w IL BOTTOM OF CASING LOSS OF CIRCULATION U w u n LL o J O O SURFACE ELEVATION = IL J IL J IL J IL LU i OU CC H w 3O ® STANDARD PENETRATION o U) U) U) ¢ w m BLOWS/FT D To soil Depth 2.00" (CL) SILTY LEAN CLAY, Brown/Tan/Red, 2 S-1 SS 18 18 Moist, Medium Stiff to Very Stiff 2 3 5 6 25 S-2 SS 18 18 10 5 15 (SC) CLAYEY FINE SAND, Orange/Red/Gray, S-3 SS 18 18 Wet, Medium Dense 11 14 i 28 14 4 S-4 SS 18 18 6 10 7 1 (SM) SILTY FINE SAND, Orange, Wet, Medium Dense to Very Loose 3 S-5 SS 18 18 4 12; 15 8 3 S-6 SS 18 18 2 4 i 20 2 AUGER REFUSAL @ 20' 25 30 THE STRATIFICATION LINES REPRESENT THE APPROXIMATE BOUNDARY LINES BETWEEN SOIL TYPES. IN -SITU THE TRANSITION MAY BE GRADUAL. WL WS ❑ WD O BORING STARTED 06/07/16 CAVE IN DEPTH @ 8' WL(SHW) 1 WL(ACR) BORING COMPLETED 06/07/16 HAMMER TYPE Auto WL RIG ATV FOREMAN Jake DRILLING METHOD HSA CLIENT JOB # BORING # SHEET All Type Construction & Manaciement, Inc. 3711 13-5 1 OF 1 �- PROJECT NAME ARCHITECT -ENGINEER ROCK QUALITY DESIGNATION & RECOVERY NORTHING EASTING STATION ROD% - — - REC% PLASTIC WATER LIQUID z DESCRIPTION OF MATERIAL ENGLISH UNITS " z U LL LIMIT% CONTENT% LIMIT% w IL BOTTOM OF CASING LOSS OF CIRCULATION U w u n LL o J O O SURFACE ELEVATION = IL J IL J IL J IL LU i OU CC H w 3O ® STANDARD PENETRATION o U) U) U) ¢ w m BLOWS/FT D To soil Depth 2.00" (CL) SANDY LEAN CLAY, Brown/Red, Moist, 2 S-1 SS 18 18 Medium Stiff to Hard 2 4 6 8 S-2 SS 18 18 16 5 1 i 33 — 13 — 56 (SC) CLAYEY FINE SAND, Red/Tan, Moist, S 38 SS 18 18 Medium Dense s 2a5 5 S-4 SS 18 18 5 12; 10 (CL) SANDY LEAN CLAY, Red/Gray/Orange, Wet, Stiff 4 S-5 SS 18 18 4 11 15 7 (SC) CLAYEY FINE SAND, Tan, Wet, Very Loose 2 S-6 SS 18 18 1 3 i 20 2 AUGER REFUSAL @ 20' 25 30 THE STRATIFICATION LINES REPRESENT THE APPROXIMATE BOUNDARY LINES BETWEEN SOIL TYPES. IN -SITU THE TRANSITION MAY BE GRADUAL. 4 WL 8 WS❑ WDO BORING STARTED 06/07/16 CAVE IN DEPTH @ 9' WL(SHW) 1 WL(ACR) BORING COMPLETED 06/07/16 HAMMER TYPE Auto WL RIG ATV FOREMAN Jake DRILLING METHOD HSA CLIENT JOB # BORING # SHEET All Type Construction & Manaciement, Inc. 3711 13-6 1 OF 1 �- PROJECT NAME ARCHITECT -ENGINEER ROCK QUALITY DESIGNATION & RECOVERY NORTHING EASTING STATION ROD% - — - REC% PLASTIC WATER LIQUID z DESCRIPTION OF MATERIAL ENGLISH UNITS " z U LL LIMIT% CONTENT% LIMIT% w IL BOTTOM OF CASING LOSS OF CIRCULATION U w u n LL o J O O SURFACE ELEVATION = IL J IL J IL J IL LU i OU CC H w 3O ® STANDARD PENETRATION o U) U) U) ¢ w m BLOWS/FT D To soil Depth 2.00" (SM) SILTY FINE SAND, Tan, Moist, Medium 2 S-1 SS 18 18 Dense, With Tree Roots 3 11 8 (SM) SILTY FINE SAND, Brown/ Black, Moist, S-2 SS 18 18 Medium Dense 4 8 i 17 5 9 (CL) SANDY LEAN CLAY, Gray, Moist to Wet, S-3 SS 18 18 Very Stiff to Stiff 7 16 9 4 S-4 SS 18 18 5 12; 10 (SM) SILTY MEDIUM TO COARSE SAND, Tan, Saturated, Loose WOH S-5 SS 18 18 3 7 15 4 2 S 6 SS 18 18 3 6 20 3 AUGER REFUSAL @ 20' 25 30 THE STRATIFICATION LINES REPRESENT THE APPROXIMATE BOUNDARY LINES BETWEEN SOIL TYPES. IN -SITU THE TRANSITION MAY BE GRADUAL. 4 WL 8 WS❑ WDO BORING STARTED 06/07/16 CAVE IN DEPTH @ 11' WL(SHW) 1 WL(ACR) BORING COMPLETED 06/07/16 HAMMER TYPE Manual WL RIG ATV FOREMAN Jake DRILLING METHOD HSA CLIENT JOB # BORING # SHEET All Type Construction & Manaciement, Inc. 3711 13-7 1 OF 1 �- PROJECT NAME ARCHITECT -ENGINEER ROCK QUALITY DESIGNATION & RECOVERY NORTHING EASTING STATION ROD% - — - REC% PLASTIC WATER LIQUID z DESCRIPTION OF MATERIAL ENGLISH UNITS " z U LL LIMIT% CONTENT% LIMIT% w IL BOTTOM OF CASING LOSS OF CIRCULATION U w u n LL o J O O SURFACE ELEVATION = IL J IL J IL J IL LU i OU CC H w 3O ® STANDARD PENETRATION o U) U) U) ¢ w m BLOWS/FT o To soil Depth 2.00" (CL) SANDY LEAN CLAY, Tan/Red, Moist, 1 S-1 SS 18 18 Medium Stiff to Very Stiff 3 3 6 6 26 i S-2 SS 18 18 13 5 13 (CL) SILTY LEAN CLAY, Gray/Red, Moist, Stiff 5 S-3 SS 18 18 6 15 9 (SM) SILTY FINE SAND, Tan/ Orange/ Red, S-4 SS 18 18 Moist, Dense 7 20 10 17 END OF BORING @ 10' 15 20 25 30 THE STRATIFICATION LINES REPRESENT THE APPROXIMATE BOUNDARY LINES BETWEEN SOIL TYPES. IN -SITU THE TRANSITION MAY BE GRADUAL. WL WS ❑ WD O BORING STARTED 06/07/16 CAVE IN DEPTH @ 7' WL(SHW) 1 WL(ACR) BORING COMPLETED 06/07/16 HAMMER TYPE Auto WL RIG ATV FOREMAN Jake DRILLING METHOD HSA CLIENT JOB # BORING # SHEET All Type Construction & Manaciement, Inc. 3711 13-8 1 OF 1 �- PROJECT NAME ARCHITECT -ENGINEER ROCK QUALITY DESIGNATION & RECOVERY NORTHING EASTING STATION ROD% - — - REC% PLASTIC WATER LIQUID z DESCRIPTION OF MATERIAL ENGLISH UNITS " z U LL LIMIT% CONTENT% LIMIT% w IL BOTTOM OF CASING LOSS OF CIRCULATION U w u n LL o J O O SURFACE ELEVATION = IL J IL J IL J IL LU i OU CC H w 3O ® STANDARD PENETRATION o U) U) U) ¢ w m BLOWS/FT o To soil Depth 2.00" (CL) SANDY LEAN CLAY, Brown, Moist, Stiff 4 S-1 SS 18 18 6 15 9 1aa♦ — Sao (SC) CLAYEY FINE SAND, Red/Tan, Moist, 2157 S-2 SS 18 18 Medium Dense 13 zo 28 5 15 (CH) SILTY FAT CLAY, Gray, Moist, Very Stiff S-3 SS 18 18 to Stiff 5 7 ? 16 9 5 S-4 SS 18 18 5 10 6 END OF BORING @ 10' 15 20 25 30 THE STRATIFICATION LINES REPRESENT THE APPROXIMATE BOUNDARY LINES BETWEEN SOIL TYPES. IN -SITU THE TRANSITION MAY BE GRADUAL. WL WS ❑ WD O BORING STARTED 06/07/16 CAVE IN DEPTH @ 7' WL(SHW) 1 WL(ACR) BORING COMPLETED 06/07/16 HAMMER TYPE Auto WL RIG ATV FOREMAN Jake DRILLING METHOD HSA APPENDIX C LABORATORY RESULTS Laboratory Testing Summary Page 1 of 1 Sample Source Sample Number Depth (feet) MC1 M Soil Type' Atterberg Limits3 Percent Passing No.200 Sieve Moisture - Densi Corr. 5 CBR Value6 Other LL PL PI Maximum Density c Optimum Moisture B-5 2158 6.0-7.5 24.5 SC 56 25 31 48.0 B-8 2157 3.5-5.0 14.0 SC 40 20 20 21.1 Notes: 1. ASTM D 2216, 2. ASTM D 2487, 3. ASTM D 4318, 4. ASTM D 1140, 5. See test reports for test method, 6. See test reports for test method Definitions: MC: Moisture Content, Soil Type: AASHTO, LL: Liquid Limit, PL: Plastic Limit, PI: Plasticity Index, CBR: California Bearing Ratio, OC: Organic Content Project No. 33.3711 Project Name: Holiday Inn and Suites PM: Mike Ellis PE: Winslow E. Goins Printed On: 6/20/16 ECS Carolinas, LLP 6714 Netherlands Drive Wilmington, NC 28405 Phone: (910) 686-9114 APPENDIX D GENERAL CONDITIONS The analysis, conclusions, and recommendations submitted in this report are based on the exploration previously outlined and the data collected at the points shown on the attached location plan. This report does not reflect specific variations that may occur between test locations. The borings were located where site conditions permitted and where it is believed representative conditions occur, but the full nature and extent of variations between borings and of subsurface conditions not encountered by any boring may not become evident until the course of construction. If variations become evident at any time before or during the course of construction, it will be necessary to make a re-evaluation of the conclusions and recommendations of this report and further exploration, observation, and/or testing may be required. This preliminary report has been prepared in accordance with generally accepted soil and foundation engineering practices and makes no other warranties, either express or implied, as to the professional advice under the terms of our agreement and included in this report. The recommendations contained herein are made with the understanding that the contract documents between the owner and foundation or earthwork contractor or between the owner and the general contractor and the caisson, foundation, excavating and earthwork subcontractors, if any, shall require that the contractor certify that all work in connection with foundations, piles, caissons, compacted fills and other elements of the foundation or other support components are in place at the locations, with proper dimensions and plumb, as shown on the plans and specifications for the project. Further, it is understood the contract documents will specify that the contractor will, upon becoming aware of apparent or latent subsurface conditions differing from those disclosed by the original soil exploration work, promptly notify the owner, both verbally to permit immediate verification of the change, and in writing, as to the nature and extent of the differing conditions and that no claim by the contractor for any conditions differing from those anticipated in the plans and specifications and disclosed by the soil explorations will be allowed under the contract unless the contractor has so notified the owner both verbally and in writing, as required above, of such changed conditions. The owner will, in turn, promptly notify ECS of the existence of such unanticipated conditions and will authorize such further exploration as may be required to properly evaluate these conditions. Further, it is understood that any specific recommendations made in this report as to on -site construction review by ECS will be authorized and funds and facilities for such review will be provided at the times recommended if we are to be held responsible for the design recommendations. APPENDIX E PROCEDURES REGARDING FIELD LOGS, LABORATORY TESTING AND SAMPLES In the process of obtaining and testing samples and preparing this report, procedures are followed that represent reasonable and accepted practice in the field of soil and foundation engineering. Specifically, field logs are prepared during performance of the drilling and sampling operations, which are intended to portray, in the driller's judgment: field occurrences, sampling locations, and other information. Samples obtained in the field are frequently subjected to testing and reclassification in the laboratory by more experienced soil engineers, and differences between the field logs and the final logs exist. The engineer preparing the report reviews the field logs, lab classifications, and test data. Using his judgment in interpreting this data, he may make further changes. Samples taken in the field are retained in our laboratory for sixty days and are then discarded, unless special disposition is requested by our client. Samples retained over a long period of time, even if sealed in jars, are subject to moisture loss which changes the apparent strength of cohesive soil generally increasing the strength from what was originally encountered in the field. Since they are then no longer representative of the moisture conditions initially encountered, an inspection of these samples should recognize this factor. 0 0 Geolechnical Engineering Repopt Geotechnical Services Are Performed for Specific Purposes, Persons, and Projects Geotechnical engineers structure their services to meet the specific needs of their clients. A geotechnical engineering study conducted for a civil engineer may not fulfill the needs of a construction contractor or even another civil engineer. Because each geotechnical engineering study is unique, each geo- technical engineering report is unique, prepared solelyforthe client. No one except you should rely on your geotechnical engineering report without first conferring with the geotechnical engineer who prepared it. And no one - not even you - should apply the report for any purpose or project except the one originally contemplated. Read the Full Report Serious problems have occurred because those relying on a geotechnical engineering report did not read it all. Do not rely on an executive summary. Do not read selected elements only. A Geotechnical Engineering Report Is Based on A Unique Set of Project -Specific Factors Geotechnical engineers consider a number of unique, project -specific factors when establishing the scope of a study. Typical factors include: the client's goals, objectives, and risk management preferences; the general nature of the structure involved, its size, and configuration; the location of the structure on the site; and other planned or existing site improvements, such as access roads, parking lots, and underground utilities. Unless the geotechnical engi- neer who conducted the study specifically indicates otherwise, do not rely on a geotechnical engineering report that was: • not prepared for you, • not prepared for your project, • not prepared for the specific site explored, or • completed before important project changes were made. Typical changes that can erode the reliability of an existing geotechnical engineering report include those that affect: • the function of the proposed structure, as when it's changed from a parking garage to an office building, or from alight industrial plant to a refrigerated warehouse, • elevation, configuration, location, orientation, or weight of the proposed structure, • composition of the design team, or • project ownership. As a general rule, always inform your geotechnical engineer of project changes - even minor ones - and request an assessment of their impact. Geotechnical engineers cannot accept responsibility or liability for problems that occur because their reports do not consider developments of which they were not informed. Subsurface Conditions Can Change A geotechnical engineering report is based on conditions that existed at the time the study was performed. Do not rely on a geotechnical engineering reportwhose adequacy may have been affected by: the passage of time; by man-made events, such as construction on or adjacent to the site; or by natu- ral events, such as floods, earthquakes, or groundwater fluctuations. Always contact the geotechnical engineer before applying the report to determine if it is still reliable. A minor amount of additional testing or analysis could prevent major problems. Most Geotechnical Findings Are Professional Opinions Site exploration identifies subsurface conditions only at those points where subsurface tests are conducted or samples are taken. Geotechnical engineers review field and laboratory data and then apply their professional judgment to render an opinion about subsurface conditions throughout the site. Actual subsurface conditions may differ -sometimes significantly from those indi- cated in your report. Retaining the geotechnical engineer who developed your report to provide construction observation is the most effective method of managing the risks associated with unanticipated conditions. A Report's Recommendations Are Not Final Do not overrely on the construction recommendations included in your re- port. Those recommendations are not final, because geotechnical engineers develop them principally from judgment and opinion. Geotechnical engineers can finalize their recommendations only by observing actual subsurface conditions revealed during construction. The geotechnical engi- neer who developed your report cannot assume responsibility or liability for the report's recommendations if that engineer does not perform construction observation. A Geotechnical Engineering Report Is Subject to Misinterpretation Other design team members' misinterpretation of geotechnical engineer- ing reports has resulted in costly problems. Lower that risk by having your geotechnical engineer confer with appropriate members of the design team after submitting the report. Also retain your geotechnical engineer to review pertinent elements of the design team's plans and specifications. Contractors can also misinterpret a geotechnical engineering report. Reduce that risk by having your geotechnical engineer participate in prebid and preconstruction conferences, and by providing construction observation. Do Not Redraw the Engineer's Logs Geotechnical engineers prepare final boring and testing logs based upon their interpretation of field logs and laboratory data. To prevent errors or omissions, the logs included in a geotechnical engineering report should never be redrawn for inclusion in architectural or other design drawings. Only photographic or electronic reproduction is acceptable, but recognize that separating logs from the report can elevate risk. Give Contractors a Complete Report and Guidance Some owners and design professionals mistakenly believe they can make contractors liable for unanticipated subsurface conditions by limiting what they provide for bid preparation. To help prevent costly problems, give con- tractors the complete geotechnical engineering report, butpreface it with a clearly written letter of transmittal. In that letter, advise contractors that the report was not prepared for purposes of bid development and that the report's accuracy is limited; encourage them to confer with the geotechnical engineer who prepared the report (a modest fee may be required) and/or to conduct ad- ditional study to obtain the specific types of information they need or prefer. A prebid conference can also be valuable. Be sure contractors have sufficient timeto perform additional study. Only then might you be in a position to give contractors the best information available to you, while requiring them to at least share some of the financial responsibilities stemming from unantici- pated conditions. Read Responsibility Provisions Closely Some clients, design professionals, and contractors do not recognize that geotechnical engineering is far less exact than other engineering disciplines. This lack of understanding has created unrealistic expectations that have led to disappointments, claims, and disputes. To help reduce the risk of such outcomes, geotechnical engineers commonly include a variety of explanatory provisions in their reports. Sometimes labeled "limitations" many of these provisions indicate where geotechnical engineers' responsibilities begin and end, to help others recognize their own responsibilities and risks. Read these provisions closely. Ask questions. Your geotechnical engineer should respond fully and frankly. Geoenvironmental Concerns Are Not Covered The equipment, techniques, and personnel used to perform a geoenviron- mental study differ significantly from those used to perform a geotechnical study. For that reason, a geotechnical engineering report does not usually re- late any geoenvironmental findings, conclusions, or recommendations; e.g., about the likelihood of encountering underground storage tanks or regulated contaminants. Unanticipated environmental problems have led to numerous project failures. If you have not yet obtained your own geoenviron mental in- formation, ask your geotechnical consultant for risk management guidance. Do not rely on an environmental report prepared for someone else. Obtain Professional Assistance To Deal with Mold Diverse strategies can be applied during building design, construction, op- eration, and maintenance to prevent significant amounts of mold from grow- ing on indoor surfaces. To be effective, all such strategies should be devised for the express purpose of mold prevention, integrated into a comprehensive plan, and executed with diligent oversight by a professional mold prevention consultant. Because just a small amount of water or moisture can lead to the development of severe mold infestations, a number of mold prevention strategies focus on keeping building surfaces dry. While groundwater, wa- ter infiltration, and similar issues may have been addressed as part of the geotechnical engineering study whose findings are conveyed in -this report, the geotechnical engineer in charge of this project is not a mold prevention consultant; none of the services performed in connection with the geotechnical engineer's study were designed or conducted for the purpose of mold prevention. Proper implementation of the recommendations conveyed in this report will not of itself he sufficient to prevent mold from growing in or on the struc- ture involved. Rely on Your ASFE-Member Geotechnical Engineer For Additional Assistance Membership in ASFE/The Best People on Earth exposes geotechnical engi- neers to a wide array of risk management techniques that can be of genuine benefit for everyone involved with a construction project. Confer with your ASFE-member geotechnical engineer for more information. ASFE 8811 Colesville Road/Suite G106, Silver Spring, MD 20910 Telephone:' 301/565-2733 Facsimile: 301/589-2017 e-mail: info@asfe.org www.asfe.org Copyright 2004 by ASFE, Inc. Duplication, reproduction, or copying of this document, in whole or in part, by any means whatsoever, is strictly prohibited, except with ASFB specific written permission. Excerpting, quoting, or otherwise extracting wording from this document is permitted only with the express written permission of ASFE, and only for purposes of scholarly research or book review. Only members of ASFE may use this document as a complement to or as an element of a geotechnical engineering report. Any other firm, individual, or other entity that so uses this document without being anASFE member could be committing negligent or intentional (fraudulent) misrepresentation. IIGER06045.0M