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HomeMy WebLinkAboutSW5220101_Soils/Geotechnical Report_20220408 (2)DocuSign Envelope ID: 4F8BDB79-C7FC-4A90-9EA8-8183393F2C3C ECS Southeast,, LLP Geotechnical Engineering Report Hardee's, Bunn, NC 420 South Main Street Bunn, North Carolina ECS Project Number 06:24656 September 30, 2021 9§ DocuSign Envelope ID: 4F8BDB79-C7FC-4A90-9EA8-8183393F2C3C ECS SOUTHEAST, LLP "Setting the Standard for Service" Geotechnical • Construction Materials • Environmental • Facilities September 30, 2021 Mr. Reggie Barnacascel, Jr Vice President of Restaurant Development Boddie -Noel Enterprises, Inc. PO Box 1908 Rocky Mount, North Carolina ECS Project No. 06:24656 Reference: Geotechnical Engineering Report Hardee's, Bunn, NC 420 South Main Street Bunn, North Carolina Dear Mr. Barnacascel: ECS Southeast, LLP (ECS) has completed the subsurface exploration, laboratory testing, and geotechnical engineering analyses for the above -referenced project. Our services were performed in general accordance with our agreed to scope of work. This report presents our understanding of the geotechnical aspects of the project, the results of the field exploration conducted, and our geotechnical design and construction recommendations for the project. It has been our pleasure to be of service to you during this phase of this project. We would appreciate the opportunity to remain involved during the continuation of the design phase, and we would like to provide our services during construction phase operations as well to verify subsurface conditions assumed for this report. Should you have any questions concerning the information contained in this report, or if we can be of further assistance to you, please contact us. Respectfully submitted, ECS Southeast, LLP DocuSigned by: 7183C27477DO4EF.. Rachel E. Zelinsky Geotechnical Staff Project Manager rzelinskyPecslimited. com DocuSigned by: ...� _ 101112021 SEAL 19331 ~ \ , p QQ"F . ,yS� SµN\QQ•••c. DocuSigned by: 54E9127B3 C 7 Thomas c ipporeit, P.E., D.GE Vice President, Principal Engineer tschipporeitC>ecslimited.com 5260 Greens Dairy Road, Raleigh, NC 27616 T. 919-861-9910 www.ecslimited.com ECS Capitol Services, PLLC • ECS Florida, LLC • ECS Mid -Atlantic, LLC ECS Midwest, LLC ECS Southeast, LLP • ECS Southwest, LLP NC Engineering No. F-1078 • NC Geology No. C-553 • SC Engineering No. 3239 DocuSign Envelope ID: 4F8BDB79-C7FC-4A90-9EA8-8183393F2C3C Geotechnical Engineering Report—Hardee's, Bunn, NC ECS Project No. 06:24656 TABLE OF CONTENTS September 30, 2021 Page EXECUTIVE SUMMARY.............................................................................................................1 1.0 INTRODUCTION............................................................................................................2 2.0 PROJECT INFORMATION...............................................................................................2 2.1 SITE INFORMATION...........................................................................................................3 2.2 PROPOSED CONSTRUCTION..............................................................................................3 3.0 FIELD EXPLORATION AND LABORATORY TESTING..........................................................4 3.1 SUBSURFACE CHARACTERIZATION....................................................................................4 3.2 GROUNDWATER OBSERVATIONS......................................................................................5 3.3 LABORATORY TESTING......................................................................................................6 4.0 DESIGN RECOMMENDATIONS......................................................................................6 4.1 BUILDING/STRUCTURE DESIGN.........................................................................................6 4.1.6 Foundations..............................................................................................................6 4.1.7 Floor Slabs.................................................................................................................7 4.1.8 Seismic Design..........................................................................................................8 4.2 SITE DESIGN CONSIDERATIONS.........................................................................................8 4.2.1 Pavements................................................................................................................8 5.0 SITE CONSTRUCTION RECOMMENDATIONS................................................................10 5.1 SUBGRADE PREPARATION...............................................................................................10 5.1.1 Previous Site Development....................................................................................10 5.1.2 Existing Utilities......................................................................................................10 5.1.3 Demolition..............................................................................................................10 5.1.4 Stripping and Grubbing...........................................................................................11 5.1.5 Proofrolling.............................................................................................................11 5.2 EARTHWORK OPERATIONS..............................................................................................12 5.2.1 Excavation Considerations......................................................................................12 5.2.2 Engineered Fill Materials........................................................................................13 5.2.3 Compaction.............................................................................................................13 5.3 FOUNDATIONS AND FLOOR SLABS..................................................................................14 5.4 PAVEMENTS.....................................................................................................................15 5.4.1 Subgrade Evaluation...............................................................................................15 5.4.2 Aggregate Base Course..........................................................................................15 5.4.3 Asphalt....................................................................................................................16 6.0 CLOSING....................................................................................................................16 APPENDICES Appendix A — Diagrams & Reports • Site Location Diagram • Boring Location Diagram • Subsurface Cross-Section(s) DocuSign Envelope ID: 4F8BDB79-C7FC-4A90-9EA8-8183393F2C3C Geotechnical Engineering Report—Hardee's, Bunn, NC September30, 2021 ECS Project No. 06:24656 Page ii Appendix B — Field Operations • Reference Notes for Boring Logs • Subsurface Exploration Procedure: Standard Penetration Testing (SPT) • Boring Logs Appendix C — Laboratory Testing • Laboratory Test Results Summary DocuSign Envelope ID: 4F8BDB79-C7FC-4A90-9EA8-8183393F2C3C Geotechnical Engineering Report—Hardee's, Bunn, NC September 30, 2021 ECS Project No. 06:24656 Page 1 EXECUTIVE SUMMARY This executive summary is intended as a very brief overview of the primary geotechnical conditions that are expected to affect design and construction. Information gleaned from the executive summary should not be utilized in lieu of reading the entire geotechnical report. • We anticipate that most of the soils encountered in the borings within the anticipated excavation depths will be suitable for use as engineered fill. However, additional environmental sampling and testing is recommended to evaluate the soil and/or groundwater for potential contamination. • The planned building should be supported by conventional shallow foundations consisting of column and/or strip footings bearing on engineered fill or natural soils. The footings should be sized using a net allowable soil bearing pressure of 3,000 psf. • Based on the N-values measured in the borings, a Seismic Site Class D designation is appropriate for seismic design of the proposed building. • ECS should be retained to review the design documents for conformance with our recommendations. • ECS should be retained for construction materials testing and special inspections to facilitate proper implementation of our recommendations. DocuSign Envelope ID: 4F8BDB79-C7FC-4A90-9EA8-8183393F2C3C Geotechnical Engineering Report—Hardee's, Bunn, NC September 30, 2021 ECS Project No. 06:24656 Page 2 1.0 INTRODUCTION The purpose of this study was to provide geotechnical information for the design of a building, parking lot, and stormwater control measure for Hardee's. The recommendations developed for this report are based on project information supplied by Boddie -Noel Enterprises, Inc. Our services were provided in accordance with our Proposal No. 06:22787, dated August 27, 2021, as authorized by Reggie Barnacascel with Boddie -Noel) Enterprises, Inc. on August 27, 2021, which includes Boddie -Noel) Enterprises, Inc. General Conditions. This report contains the procedures and results of our subsurface exploration and laboratory testing programs, review of existing site conditions, engineering analyses, and recommendations for the design and construction of the project. The report includes the following items. a. Observations from our site reconnaissance including current site conditions. b. A review of the published geologic conditions and their relevance to your planned development. c. A subsurface characterization and a description ofthefield exploration and laboratorytests performed. d. Logs of the soil borings prepared in accordance with the standard practice for geotechnical engineering. e. The results of the laboratory tests performed. f. Recommended allowable soil bearing pressure for conventional shallow foundations (spread footings) and estimates of predicted foundation settlement. g. Recommendations for slab -on -grade design and construction, including recommendations for subgrade improvements and design modulus of subgrade reaction. h. Recommendations for seismic site classification in accordance with the 2018 North Carolina Building Code. Recommendations for design and construction of the pavements. Evaluation of the on -site soil characteristics encountered in the soil borings, including suitability of the on -site materials for reuse as engineered fill, compaction requirements, and suitable material guidelines. 2.0 PROJECT INFORMATION This report is based on the following sources of information: • Emails between Reggie Barnacascel with Boddie -Noel) Enterprises, Inc. and Nathan Nallainathan with ECS between August 6, 2021, and August 7, 2021. • Construction Drawings prepared by NRD Architecture & Engineers dated January 11, 2018. • Site Sketch with boring locations prepared by McAdams dated May 3, 2021. • Google Earth aerial photo dated February 2019. DocuSign Envelope ID: 4F8BDB79-C7FC-4A90-9EA8-8183393F2C3C Geotechnical Engineering Report—Hardee's, Bunn, NC September 30, 2021 ECS Project No. 06:24656 Page 3 • Site and topographic information obtained from the Franklin County GIS website. • Report of Seasonal High Water Table Estimation and Infiltration Testing, prepared by ECS, dated September 14, 2021. • Phase I Environmental Site Assessment Report, prepared by ECS, dated September 22, 2021, ECS Project No. 49:14912. 2.1 SITE INFORMATION The site is located at 420 South Main Street in Bunn, North Carolina, at the approximate location shown in the following figure. iwsahm #' & _ Figure 2.1.1. Site Location We understand the property is currently developed with buildings and a gravel parking lot. The site is relatively flat and includes grass -covered areas and scattered trees. Tax records identify the larger of the two existing buildings as a restaurant building while the second building was used for restaurant storage and pits to roast/cook meat for the restaurant. The structures are currently vacant and use for storage. The subject property is located in a residential and commercial area, with a gas station across Main Street from the site. A water supply well is located along the western site boundary. A debris pile is located near the southern site boundary. 2.2 PROPOSED CONSTRUCTION ECS understands the proposed project involves construction of a new Hardee's restaurant including an approximately 2,682-square-foot building, paved parking and drive areas, concrete sidewalks, and a concrete delivery and dumpster pad. We understand the building will be a one-story wood - framed structure with a slab -on -grade floor. We understand the maximum unfactored foundation loads will be: • Maximum Column Load = 50 kips • Maximum Wall Loads= 1 kips per foot • Maximum Ground Floor Slab Load = 150 pounds per square foot (psf) DocuSign Envelope ID: 4F8BDB79-C7FC-4A90-9EA8-8183393F2C3C Geotechnical Engineering Report—Hardee's, Bunn, NC September 30, 2021 ECS Project No. 06:24656 Page 4 The structural engineer should verify these assumptions and notify ECS if the actual unfactored foundation design loads exceed or are significantly less than these assumed values. Based on existing site grades, and our experience with similar projects, we assume that cut and fill depths will be less than 2 feet for general site grading. 3.0 FIELD EXPLORATION AND LABORATORY TESTING Our exploration procedures are explained in greater detail in Appendix B including the insert titled Subsurface Exploration Procedure: Standard Penetration Testing (SPT). Our scope of work included drilling six borings. Our borings were located with a handheld GPS unit and their approximate locations are shown on the Boring Location Diagram in Appendix A. 3.1 SUBSURFACE CHARACTERIZATION The subsurface conditions encountered were generally consistent with published geological mapping. The following sections provide generalized characterizations of the soil. Please refer to the boring logs in Appendix B. The site is located within the Piedmont physiographic province. The Piedmont is characterized by residual overburden soils weathered in place from the underlying igneous and metamorphic rock. The topography and relief of the Piedmont uplands have developed from differential weathering of the bedrock. Because of the continued chemical and physical weathering, the bedrock in the Piedmont is now generally covered with a mantle of soil that has weathered in place from the parent bedrock. These soils have variable thicknesses and are referred to as residuum or residual soils. The residuum is typically finer grained and has higher clay content near the surface because of the advanced weathering. Similarly, the soils typically become coarser grained with increasing depth because of decreased weathering. As the degree of weathering decreases, the residual soils generally retain the overall appearance, texture, gradation and foliations of the parent rock. The boundary between soil and rock in the Piedmont is not sharply defined. A transitional zone termed "partially weathered rock" is normally found overlying the parent bedrock. Partially weathered rock (PWR) is defined for engineering purposes as residual material with Standard Penetration Resistances (N-values) exceeding 100 blows per foot. The transition between hard/dense residual soils and partially weathered rock occurs at irregular depths due to variations in degree of weathering. Also, it is not unusual to find lenses and boulders of hard rock and/or zones of partially weathered rock within the soil mantel well above the general bedrock level. According to the 1985 Geologic Map of North Carolina the site is underlain by foliated to massive granitic rock of Permian to Pennsylvanian age (PPmg). The general subsurface strata are summarized in the following table: DocuSign Envelope ID: 4F8BDB79-C7FC-4A90-9EA8-8183393F2C3C Geotechnical Engineering Report—Hardee's, Bunn, NC ECS Project No. 06:24656 Subsurface StratieraoW September 30, 2021 Page 5 Approximate Stratum Description Ranges of Average Depth SPT (1) N-values (ft) (bpf) 0-0.3 n/a Surficial Material: Topsoil (3 inches) N/A 0.3-3 1 Medium Dense Silty SAND (SM) 12 to 26 (N-ave=16) 3-12 11 Stiff to Very Stiff SILT (ML, MH) and CLAY (CL, CH) 10 to 19 (N-ave=14) 12-20 111 Medium Dense Clayey SAND (SC) 15 to 17 (N-ave=16) Note: (1) Standard Penetration Testing The depths given in the previous table are average depths. The actual strata depths may vary significantly at specific boring locations. A graphical presentation of the subsurface conditions is shown on the Subsurface Cross Section included in Appendix A. As shown, the strata thicknesses are variable across the site. Please note that the ground surface elevations shown on the boring logs and cross section were not surveyed by a licensed surveyor. These elevations were interpolated using topographic information obtained from Google Earth. They should be considered approximate and accurate to +/- several feet. Also, please note that a petroleum product odor was observed from some of the geotechnical soil samples (e.g., B-01, B-02, and B-03). 3.2 GROUNDWATER OBSERVATIONS Water levels were measured and are given on the boring logs in Appendix B. Groundwater depths measured at the time of drilling was 18.5 feet below the ground surface, corresponding to EL. 260.5 to EL. 262.5 ft. Variations in the long-term water table may occur as a result of changes in precipitation, evaporation, surface water runoff, construction activities, and other factors. As stated in the ECS Seasonal High Water Table Estimation and Infiltration Testing Report dated September 14, 2021 (ECS Project No. 49:14912-B), the seasonal high water table was estimated to be at depths of 30 to 36 inches at the two test locations in the proposed Stormwater Control Measure (SCM) area. Based on the geotechnical borings, this is likely representative of occasional perched water table conditions in Stratum I during the typically wetter cooler months of the year (November through March). DocuSign Envelope ID: 4F8BDB79-C7FC-4A90-9EA8-8183393F2C3C Geotechnical Engineering Report—Hardee's, Bunn, NC ECS Project No. 06:24656 3.3 LABORATORY TESTING September 30, 2021 Page 6 Each sample was visually classified on the basis of texture and plasticity in accordance with ASTM D2488 Standard Practice for Description and Identification of Soils (Visual -Manual Procedures). The laboratory testing consisted of selected tests performed on samples obtained during our field exploration operations. Classification and index property tests were performed on representative soil samples in accordance with ASTM D2487 Standard Practice for Classification for Engineering Purposes. After identification and classification, the samples were grouped in the major zones noted on the boring logs in Appendix B. The group symbols for each soil type are indicated in parentheses along with the soil descriptions. The stratification lines between strata on the logs are approximate; in situ, the transitions may be gradual. 4.0 DESIGN RECOMMENDATIONS 4.1 BUILDING/STRUCTURE DESIGN 4.1.6 Foundations Provided subgrades and engineered fills are prepared as discussed herein, and based on the assumed design foundation loads, the proposed building can be supported by conventional shallow spread footing foundations. These include individual columnfootings and continuouswall footings. The design of the shallow foundations should utilize the following parameters: Foundation Design Design Parameter Column Footing Wall Footing Net Allowable Bearing Pressure i11 3,000 psf 3,000 psf Acceptable Bearing Soil Material Stiff Silts/Clays, Medium Dense Sands, or Engineered fill Minimum Width 24 inches 16 inches Minimum Footing Embedment Depth (below 12 inchesZ 12 inchesZ slab or finished grade) (Z) Estimated Total Settlement (3) Less than 1 inch Less than 1 inch Estimated Differential Settlement i41 Less than 0.5 inches Less than 0.5 inches over between columns 50 feet Notes: (1) Net allowable bearing pressure is the applied pressure in excess of the surrounding overburden soils above the base of the foundation. (2) For bearing considerations and frost penetration requirements. (3) Based on assumed structural loads. If final loads are different, ECS must be contacted to update foundation recommendations and settlement calculations. (4) Based on anticipated range of column/wall loads and variability in borings. Differential settlement can be re-evaluated once the foundation plans are more complete. DocuSign Envelope ID: 4F8BDB79-C7FC-4A90-9EA8-8183393F2C3C Geotechnical Engineering Report—Hardee's, Bunn, NC September 30, 2021 ECS Project No. 06:24656 Page 7 4.1.7 Floor Slabs Floor Slabs Above Exterior Grades: The on -site lower plasticity natural soils and new engineered fill are considered suitable for support of the ground floor slabs, although moisture control during earthwork operations, including the use of disking or appropriate drying equipment, may be necessary. We assume that the ground floor slabs -on -grade will be at or above finish exterior grades around the entire building footprint. For this case, the 2018 North Carolina Building Code does not require damproofing or waterproofing of the slab. However, depending on floor coverings and building use, a capillary break layer and vapor retarder should be installed to prevent excessive moisture from coming in contact with the concrete floor slab from the soils below. The following graphic depicts our soil -supported slab recommendations: Vapor Retarder or Vapor Concrete Slab Barrier 00oQU0Q.'-o0 oUo U0o U� Uo 0 0 0 0 00 0 00 0 0 o 0 0 0 0 0 00 0 0 0 Base Course 0 0 0 Firm, Stable, Compacted Soil Subgrade Floor Slab Section 1. Base Course Layer Thickness: 4 inches 2. Base Course Layer Material: A compactable granular fill that will remain stable and support construction traffic. At least 10% to 30% of the material should pass a No. 100 sieve with a maximum aggregate size of'/ inch. Suitable materials are GRAVEL (ABC, GW, GW-SM), SAND (SP-SM, SW-SM), and SILTY SAND (SM) with less than 30% fines. 3. Base Course Layer Material should be compacted to at least 98% maximum dry density per ASTM D698 4. Undisturbed natural subgrade should proofroll as firm and stable. Upper 1 foot of engineered fill subgrade should be compacted to at least 98% maximum dry density per ASTM D698 5. Vapor Barrier or Vapor Retarder — Refer to ACI 302.1R-04 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 recommendations on this issue. Additionally, any environmental vapor intrusions considerations should be taken into account by the vapor barrier/vapor retarder material selection and design. Provided a base course break layer is implemented in the slab section, the slabs may be designed using a modulus of subgrade reaction of 125 psi/in. This value is applicable for design of slabs subject to point loads and should be reduced based on loaded area for uniform sustained distributed loads. Ground -supported slabs should be isolated from the foundations and foundation -supported DocuSign Envelope ID: 4F8BDB79-C7FC-4A90-9EA8-8183393F2C3C Geotechnical Engineering Report—Hardee's, Bunn, NC September 30, 2021 ECS Project No. 06:24656 Page 8 elements of the structure so that differential movement between the foundations and slab will not induce excessive shear and bending stresses in the floor slab. Where the structural configuration prevents the use of a free-floating slab, the slab should be designed with suitable reinforcement and load transfer devices to preclude overstressing of the slab. 4.1.8 Seismic Design The 2018 North Carolina Building Code requires site classification for seismic design based on the upper 100 feet of a soil profile. Three methods are utilized in classifying sites, namely the shear wave velocity (vs) method; the unconfined compressive strength (s") method; and the Standard Penetration Resistance (N-value) method. The N-value method was used for this project. The seismic site class definitions for the weighted average of shear wave velocity or SPT N-value in the upper 100 feet of the soil profile are shown in the following table: Seismic Site Classification Site Class Soil Profile Name Shear Wave Velocity, Vs, (ft./s) N value (bpf) A Hard Rock Vs > 5,000 fps N/A B Rock 2,500 < Vs <- 5,000 fps N/A C Very dense soil and soft rock 1,200 < Vs <- 2,500 fps >50 D Stiff Soil Profile 600 <- Vs <- 1,200 fps 15 to 50 E Soft Soil Profile Vs < 600 fps <15 The 2018 North Carolina Building requires that a Site Class be assigned for the seismic design of new structures. The Site Class for the site was determined by calculating a weighted average SPT N-value for the top 100 feet of the subsurface profile. Based on the conditions encountered in the borings, we recommend that a Site Class "D" be used for design of the proposed building. 4.2 SITE DESIGN CONSIDERATIONS 4.2.1 Pavements Design Traffic Loading: We assume design traffic loads will be limited to cars and light trucks in light -duty areas (less than 30,000 ESALs in 20 years), in addition to occasional delivery, garbage, and recycling trucks in heavy-duty areas (less than 100,000 ESALs in 20 years). Subgrade Characteristics: Pavement subgrades soils should consist of firm, stable, compacted low plasticity soil. Based on the laboratory test results and our experience with similar soils, a design CBR value of 4 is recommended for this project. The pavement design assumes subgrades consist of suitable materials evaluated by ECS and placed and compacted to at least 98 percent of the maximum dry density as determined by the Standard Proctor test (ASTM D 698). Minimum Material Thicknesses: The following minimum pavement sections may be used by the civil engineer to develop the pavement design drawings for the project, provided the civil engineer is in agreement with ECS' design traffic loading assumptions and estimates. The contractor should DocuSign Envelope ID: 4F8BDB79-C7FC-4A90-9EA8-8183393F2C3C Geotechnical Engineering Report—Hardee's, Bunn, NC ECS Project No. 06:24656 September 30, 2021 Page 9 bid and construct the project in accordance with the civil design drawings, not the recommendations given in this report. These recommendations are not contract drawings nor specifications. Asohalt Pavement Section Recommendations Pavement Light Duty Heavy Duty Material Designation Pavement Pavement Type (in.) (in) Asphalt Surface Course (S9.513) 2 3 Flexible Aggregate Base Course 6 6 Concrete Pavement Section Recommendations Heavy Duty Pavement Material Designation Concrete T Type Pavement (in.) Portland Cement Concrete Rigid (4000 psi, air -entrained) 5 Aggregate Base Course 6 ECS should be allowed to review these recommendations and make appropriate revisions based upon the formulation of the final traffic design criteria for the project. Concrete Pavements: Concentrated front -wheel loads are frequently imposed on pavements in trash dumpster and truck loading dock areas. This type of loading typically results in rutting and scuffing of bituminous pavements and ultimately pavement failures and costly repairs. Therefore, we recommend that the pavements in trash pickup and loading dock aprons areas utilize the aforementioned Portland Cement Concrete (PCC) pavement section. It may be prudent to use rigid pavement sections in all areas planned for heavy truck traffic. The Portland cement concrete pavement section should consist of air -entrained Portland cement concrete having a minimum 28-day compressive strength of 4,000 psi. The rigid pavement section should be provided with construction joints and saw -cut control joints at appropriate intervals per Portland Cement Association (PCA) requirements. The construction joints should be reinforced with dowels to transfer loads across the joints. Wire mesh should be included to control shrinkage cracking of the concrete. We used a Load Transfer Coefficient, J, of 4.2 to determine the recommended concrete pavement thickness given in the preceding table. The concrete pavement section thickness is for plain jointed concrete pavement with reinforcement dowels only at construction joints. Construction Traffic: It is important to note that the design sections do not account for construction traffic loading. An incomplete pavement section without the final 1 inch of surface course asphalt can be used for temporary construction traffic, such as concrete trucks and tractor trailer material delivery trucks. Please note, however, that damage to the asphalt already placed is likely to occur in localized areas, and it should be repaired by removal and replacement with new asphalt at or near the end of construction, prior to placement of the surface course. DocuSign Envelope ID: 4F8BDB79-C7FC-4A90-9EA8-8183393F2C3C Geotechnical Engineering Report—Hardee's, Bunn, NC September 30, 2021 ECS Project No. 06:24656 Page 10 Alternatively, heavy construction vehicles and traffic should be limited to a temporary pavement section consisting of 12 inches of compacted ABC overlying a high -strength woven geotextile (Tencate Mirafi HP270 or equivalent). The temporary pavement section could then be graded and covered with asphalt to achieve the final design heavy duty pavement section. Public Streets/Roads: It should also be noted that these design recommendations may not satisfy the local municipality or North Carolina Department of Transportation guidelines. Any roadways constructed for public use and to be dedicated to the local municipality or State for repair and maintenance must be designed in accordance with the local municipality or State requirements. 5.0 SITE CONSTRUCTION RECOMMENDATIONS 5.1 SUBGRADE PREPARATION 5.1.1 Previous Site Development When reviewing our recommendations, please note that there are existing structures on this site on this site, and that previous grading activities have likely occurred on this site. Our experience with previously graded sites indicates that unexpected conditions can exist that were not encountered bythe soil test borings. Unexpected conditions could include areas of soft or loose fill, debris -laden fill, and other obstructions or conditions. These conditions should be addressed by on -site engineering evaluation by ECS during construction. 5.1.2 Existing Utilities Underground utilities are present at the site. Future access to existing utilities will be difficult if covered by new construction. Existing utilities could be damaged by construction activity or by loads from the new structures or pavements. Existing utilities left in place can trigger subsidence leading to differential settlement and damage to new construction. Backfill associated with existing utilities can cause variable support conditions as compared to the surrounding native soils. If existing or former underground utilities are abandoned and not removed or grouted full, soil may migrate into open voids (e.g., open pipes from utilities), causing subsidence of the overlying construction. In addition, existing utility lines, if located within proposed construction areas, may cause the new construction to behave unexpectedly due to the variable support conditions caused by old backfill. Furthermore, old backfill along utility lines also may provide inadequate support due to poor compaction. The poor support conditions may result in settlement or distress of the overlying new construction. Based on our experience, existing utility backfill rarely is suitable for support of new building foundations. In slab and pavement areas, the load support characteristics of the backfill along utility lines typically can be assessed with careful proofrolling and subgrade evaluation during construction. Some undercutting and/or bridging of these backfill areas should be anticipated. 5.1.3 Demolition Site demolition should include the removal of existing asphalt, concrete pavement, concrete slabs, concrete curb and gutter, underground utilities, underground stormwater structures and pipes, buried structures, and foundations from the proposed construction areas. Any underground DocuSign Envelope ID: 4F8BDB79-C7FC-4A90-9EA8-8183393F2C3C Geotechnical Engineering Report—Hardee's, Bunn, NC ECS Project No. 06:24656 September 30, 2021 Page 11 utilities that may exist within the proposed building areas should be relocated, and any within proposed pavement areas should be evaluated by the design team and relocated or filled with grout, if necessary. The existing water supply well should be properly abandoned in accordance with North Carolina regulations. 5.1.4 Stripping and Grubbing The subgrade preparation should consist of stripping all vegetation, rootmat, topsoil, and any other soft or unsuitable materials from the proposed construction areas. The borings generally encountered 3 inches of topsoil. Deeper topsoil or organic laden soils are likely present in wet, low- lying, and poorly drained areas. The topsoil encountered in the borings was not analyzed for its suitability for reuse in landscaping areas. ECS should be called on to verify that topsoil and unsuitable surficial materials have been completely removed prior to the placement of engineered fill or construction of structures and pavements. We anticipate average stripping depths of 12 inches to remove the cultivated soil from the existing agricultural fields, 6 inches to remove topsoil and rootmat from areas that are currently grass-, weed- or brush -covered, and 12 inches to remove the topsoil and rootmat from areas that are currently wooded. We recommend that these average stripping depths be used for quantity approximations for earthwork design and construction cost estimating. 5.1.5 Proofrolling After removing all unsuitable surface materials, cutting to the proposed grade, and prior to the placement of any engineered fill or other construction materials, the exposed subgrade should be examined by the geotechnical engineer or authorized representative. The exposed subgrade should be thoroughly proofrolled with construction equipment having a minimum axle load of 10 tons (e.g. fully loaded tandem -axle dump truck). The areas subject to proofrolling should be traversed by the equipment in two perpendicular (orthogonal) directions with overlapping passes of the vehicle under the observation of the geotechnical engineer or authorized representative. This procedure is intended to assist in identifying any localized yielding materials. In the event that unstable or "pumping" subgrade is identified by the proofrolling, those areas should be marked for repair prior to the placement of any subsequent engineered fill or other construction materials. Methods of repair of unstable subgrade, such as undercutting or moisture conditioning or chemical stabilization, should be discussed with the geotechnical engineer to determine the appropriate procedure with regard to the existing conditions causing the instability. Test pits and/or hand auger borings may be excavated to explore the shallow subsurface materials in the area of the instability to help in determining the cause of the observed unstable materials and to assist in the evaluation of the appropriate remedial action to stabilize the subgrade. If site earthwork is performed during the typically cooler, wetter months of the year, additional undercutting in other areas of the site is anticipated due to potentially excessively wet unstable soils. Undercut excavations should be backfilled with properly placed and engineered fill. Use of geotextiles and select granular fill may be recommended by ECS during construction to reduce the required undercut depths and/or aid in stabilization of subgrades. DocuSign Envelope ID: 4F8BDB79-C7FC-4A90-9EA8-8183393F2C3C Geotechnical Engineering Report—Hardee's, Bunn, NC September 30, 2021 ECS Project No. 06:24656 Page 12 We recommend that unsuitable/unstable soil undercut allowance quantities be determined by the design team for inclusion in a classified earthwork contract, and bidders should provide unit prices for the following: • Excavation of, disposal of (either off -site or on -site, depending on available space and owner's preference), and replacement of unsuitable/unstable soils with engineered fill (per cubic yard). • Excavation of, disposal of (either off -site or on -site, depending on available space and owner's preference), and replacement of unsuitable/unstable soils with NCDOT Class II, Type 1 Select Material (per cubic yard). • Installation of woven geotextile, Mirafi HP270 or equivalent (per square yard) 5.2 EARTHWORK OPERATIONS 5.2.1 Excavation Considerations Environmental Considerations: ECS Environmental Report No. 49:14912 should be reviewed for environmental considerations for excavations at this site. This report identified a nearby gas station as a Recognized Environmental Condition, which could possibly have impacted the soil and groundwater on the subject site. Also, some of the soils samples from the geotechnical borings exhibited a petroleum product odor. We recommend that additional environmental sampling and testing be performed to evaluate the potential for contamination of the soil and/or groundwater at the site. Any contaminated soils excavated during the construction of the project should be handled on -site as required by environmental regulations or should be disposed of off -site in a permitted facility. Temporary stockpiling and testing of excavated soil may be required to determine contaminant type, concentrations, and disposal options. Any contaminated groundwater removed by construction dewatering should be disposed of off -site, perhaps in a wastewater treatment facility. Temporary containerization and testing of pumped groundwater may be required to determine the contaminant types, concentrations, and disposal/treatment options. Excavation Safety: All excavations and slopes should be made and maintained in accordance with OSHA excavation safety standards. The contractor is solely responsible for designing and constructing stable, temporary excavations and slopes and should shore, slope, or bench the sides of the excavations and slopes as required to maintain stability of both the excavation sides and bottom. The contractor's responsible person, as defined in 29 CFR Part 1926, should evaluate the soil exposed in the excavations as part of the contractor's safety procedures. In no case should slope height, slope inclination, or excavation depth, including utility trench excavation depth, exceed those specified in local, state, and federal safety regulations. ECS is providing this information solely as a service to our client. ECS is not assuming responsibility for construction site safety or the contractor's activities; such responsibility is not being implied and should not be inferred. Construction Dewatering: Based on the borings, our experience with groundwater fluctuations on similar sites, and anticipated design grades, most of the temporary excavations are unlikely to encounter groundwater. However, some of excavations could encounter seasonally high perched groundwater at depths as shallow as 2.5 to 3 feet. The contractor should be prepared to remove DocuSign Envelope ID: 4F8BDB79-C7FC-4A90-9EA8-8183393F2C3C Geotechnical Engineering Report—Hardee's, Bunn, NC September 30, 2021 ECS Project No. 06:24656 Page 13 any precipitation or groundwater that may seep into temporary construction excavations using open pumping. Open pumping utilizes submersible sump pumps in pits or trenches dug below the bottom of the excavation and backfilled with No. 57 stone. Excavatibility: Based on the assumed excavation depths for mass grading, footings and utilities, we anticipate that the majority of the materials to be excavated will be natural soils, which can be removed with conventional earth excavation equipment such as track -mounted backhoes, loaders, or bulldozers. However, the weathering process in the Piedmont can be erratic and significant variations of the depths of the more dense materials can occur in relatively short distances. In some cases, isolated boulders or thin rock seams may be present in the soil matrix. These isolated boulders or rock seams may require ripping, hammering, or blasting to remove. 5.2.2 Engineered Fill Materials Product Submittals: At least one week prior to placement of engineered fill, representative bulk samples (about 50 pounds) of on -site and/or off -site borrow should be submitted to ECS for laboratory testing, which will include Atterberg limits, natural moisture content, grain -size distribution, and moisture -density relationships for compaction. Import materials should be tested prior to being hauled to the site to determine if they meet project specifications. Suitable Engineered Fill Materials: Materials suitable for use as engineered fill should consist of inorganic soils classified as CL, ML, SM, SC, SW, SP, GW, GM and GC, or a combination of these group symbols, per ASTM D 2487. The materials should be free of organic matter and debris. The fill should exhibit a maximum dry density of at least 90 pounds per cubic foot, as determined by a Standard Proctor compaction test (ASTM D 698). Unsuitable Materials: Unsuitable fill materials include materials which do not satisfy the requirements for suitable materials, such as topsoil, organic materials, debris, and debris -laden fill. On -Site Borrow Suitability: The on -site soils meeting the classifications for recommended suitable engineered fill, plus meeting the restrictions on separation distances, organic content, and debris, may be used as engineered fill. We anticipate that most of the soils encountered in the borings within the anticipated excavation depths will be suitable for use as engineered fill. If any of the deeper Elastic SILT (MH) encountered in Boring B-04 is excavated, it should not be used as engineered fill. On -site soils used as engineered fill will require careful moisture control in order to achieve compaction and stability. Any soils excavated from below the water table will require significant drying to achieve the recommended moisture content and minimum compaction. Soils above the water table may also be relatively dry at the time of construction and require wetting to achieve the recommended moisture content and minimum compaction. 5.2.3 Compaction Fill Compaction: Engineered fill should be placed in maximum 8-inch loose lifts. In confined areas such as utility trenches, portable compaction equipment and thin lifts of 4 inches to 6 inches may be required to achieve specified degrees of compaction. DocuSign Envelope ID: 4F8BDB79-C7FC-4A90-9EA8-8183393F2C3C Geotechnical Engineering Report—Hardee's, Bunn, NC ECS Project No. 06:24656 September 30, 2021 Page 14 Engineered fill should be moisture conditioned as necessary to within -3 and +3 % of the soil's optimum moisture content. Moisture conditioning options include spraying and mixing in water to excessively dry soils, scarifying and drying of excessively wet soils, and adding lime to excessively wet soils. Engineered fill should be compacted with suitable equipment to a dry density of at least 95% of the Standard Proctor maximum dry density (ASTM D698) more than 12 inches below the finish subgrade elevation and to a least 98% in the upper 12 inches. ECS should be retained to observe and test the placement and compaction of engineered fill. Fill Placement Considerations: Proper drainage should be maintained during the earthwork phases of construction to prevent ponding of water which will degrade the subgrade soils. Exposed soil subgrades should be protected at the end of each working day by sloping to drain and sealing with a smooth -drum roller to limit infiltration of precipitation and surface water. Where fill materials will be placed to widen existing embankment fills, or placed up against sloping ground, the soil subgrade should be scarified and the new fill benched or keyed into the existing material. Fill material should be placed in horizontal lifts. Moisture Conditioning: The on -site soils are moisture sensitive and can be difficult to work. Problems include softening of exposed subgrade soils, excessive rutting or deflection under construction traffic, and the inability to adequately dry and compact wet soil. Drying and compaction of wet soils is typically difficult during typically cooler, wetter months of the year (typically November through March). During the cooler and wetter periods of the year, delays and additional costs should be anticipated. At these times, reduction of soil moisture may need to be accomplished by a combination of mechanical manipulation and the use of chemical additives, such as lime or cement, in order to lower moisture contents to levels appropriate for compaction. Alternatively, removal and replacement with drier, off -site materials may be necessary. Subgrade Protection: Measures should also be taken to limit site disturbance, especially from rubber -tired heavy construction equipment, and to control and remove surface water from development areas, including structural and pavement areas. It would be advisable to designate and cover haul roads and construction staging areas to limit the areas of disturbance and to prevent construction traffic from excessively degrading subgrade soils. Haul roads and construction staging areas should be covered with ABC to protect those subgrades. 5.3 FOUNDATIONS AND FLOOR SLABS Protection of Foundation Excavations: Exposure to the environment may weaken the soils at the footing bearing level if the foundation excavations remain open for too long a time. Therefore, foundation concrete should be placed the same day that excavations are made or shortly thereafter. If the bearing soils are softened by surface water intrusion or exposure, the softened soils must be removed from the foundation excavation bottom immediately prior to placement of concrete. If the excavation must remain open overnight, or if rainfall becomes imminent while the bearing soils are exposed, a 1 to 3-inch thick "mud mat" of "lean" concrete should be placed on the bearing soils before the placement of reinforcing steel. DocuSign Envelope ID: 4F8BDB79-C7FC-4A90-9EA8-8183393F2C3C Geotechnical Engineering Report—Hardee's, Bunn, NC September 30, 2021 ECS Project No. 06:24656 Page 15 Footing Subgrade Observations: It will be important to have the geotechnical engineer of record observe the foundation subgrade prior to placing foundation concrete, to confirm the bearing soils are as anticipated. If very loose sand, very soft to soft silt/clay, or otherwise unsuitable or unstable soils are observed at the footing bearing elevations, they should be undercut and removed. Any undercut excavation should be backfilled with engineered fill, No. 57 stone wrapped in woven geotextile, flowable fill, or lean concrete (f', >- 1,000 psi at 28 days) up to the original design bottom of footing elevation. The footing should be constructed on top of the engineered fill, No. 57 stone wrapped in woven geotextile, hardened flowable fill, or hardened lean concrete. Slab Subgrade Verification: A representative of ECS should be called on to observe exposed subgrades within the expanded building limits prior to engineered fill placement to assure that adequate subgrade preparation has been achieved. Proofrolling using a drum roller or loaded dump truck should be performed in their presence at that time. Once subgrades have been determined to be firm and stable, engineered fill can be placed. If there will be a significant time lag between the site grading work and final grading of concrete slab areas prior to the placement of the design floor slab section materials, a representative of ECS should be called on to verify the condition of the prepared soil subgrade. Prior to final floor slab section construction, the soil subgrade may require scarification, moisture conditioning, and re - compaction to restore stable conditions. Based on the borings, we anticipate undercutting of very soft to soft or very loose slab subgrade soils could be necessary in localized areas of the site. The amount of undercutting will be dependent on design grades and weather conditions at the time of construction. 5.4 PAVEMENTS 5.4.1 Subgrade Evaluation The soil subgrade should be smooth -rolled and proofrolled prior to ABC placement. Areas that pump, rut, or are otherwise unstable should be re -compacted or undercut and replaced. Based on the borings, we anticipate undercutting of very soft to soft or very loose pavement subgrade soils could be necessary in localized areas of the site. The amount of undercutting will be dependent on design grades and weather conditions at the time of construction. 5.4.2 Aggregate Base Course The ABC should conform with the gradation, liquid limit, plasticity index, resistance to abrasion, and soundness per Section 1005 of the 2012 NCDOT Standard Specifications for Roads and Structures. The ABC should be placed in a single lift. The ABC should be placed and be compacted in accordance with Section 520 of the 2012 NCDOT Standard Specifications for Roads and Structures. The ABC should be placed in a single lift if 10 inches or less in thickness. Two lifts of ABC should be placed for layers more than 10 inches thick. The ABC should be compacted to at least 98 percent of its Modified Proctor maximum dry unit DocuSign Envelope ID: 4F8BDB79-C7FC-4A90-9EA8-8183393F2C3C Geotechnical Engineering Report—Hardee's, Bunn, NC September 30, 2021 ECS Project No. 06:24656 Page 16 weight per ASTM D1557 or AASHTO T180 (as modified by NCDOT), provided nuclear density testing is performed. Otherwise, at least 100% compaction is recommended. To confirm that the specified degree of compaction is being obtained, field compaction testing should be performed in each ABC lift by the geotechnical engineer's representative. We recommend that compaction tests be performed at a minimum frequency of one test per 5,000 square feet per lift in pavement areas. The early placement of the ABC will minimize the deterioration of the prepared soil subgrades. However, some loss of graded aggregate due to rutting and surface contamination may occur prior to final asphalt or concrete paving. Some infilling and re -grading of the aggregate base course may be required. The ABC should be smooth -rolled and proofrolled prior to asphalt or concrete pavement placement. Areas that pump, rut, or are otherwise unstable should be wetted or dried as needed and re -compacted. Alternatively, unstable areas could be undercut and replaced. 5.4.3 Asphalt Minimum Asphalt Lift Thickness: The minimum lift thickness for S9.513 is 1.0 inch and the maximum lift thickness for S9.513 is 1.5 inches. For sections with more than 1.5 inches of S9.513 surface asphalt, it should be placed in two lifts. Asphalt pavement S9.513 should be compacted to least 90.0 percent of the material's specific gravity Gmm. Asphalt Quality Control/Quality Assurance: We recommend that the asphalt contractor perform quality control procedures and testing per the project specifications to establish the required roller pattern(s). Quality assurance testing should be provided by the geotechnical engineer's representative and should consist of coring the placed asphalt pavement to verify thickness and compaction. 6.0 CLOSING ECS has prepared this report of findings, evaluations, and recommendations to guide geotechnical- related design and construction aspects of the project. The description of the proposed project is based on information provided to ECS. If any of this information is inaccurate, either due to our interpretation of the documents provided or site or design changes that may occur later, ECS should be contacted immediately in order that we can review the report in light of the changes and provide additional or alternate recommendations as may be required to reflect the proposed construction. We recommend that ECS be allowed to review the project's plans and specifications pertaining to our work so that we may ascertain consistency of those plans/specifications with the intent of the geotechnical report. Field observations, monitoring, and quality assurance testing during earthwork and foundation installation are an extension of and integral to the geotechnical design recommendation. We recommend that the owner retain these quality assurance services and that ECS be allowed to continue our involvement throughout these critical phases of construction to provide general DocuSign Envelope ID: 4F8BDB79-C7FC-4A90-9EA8-8183393F2C3C Geotechnical Engineering Report—Hardee's, Bunn, NC September 30, 2021 ECS Project No. 06:24656 Page 17 consultation as issues arise. ECS is not responsible for the conclusions, opinions, or recommendations of others based on the data in this report DocuSign Envelope ID: 4F8BDB79-C7FC-4A90-9EA8-8183393F2C3C Appendix A - Drawings and Reports Site Location Diagram Boring Location Diagram(s) Subsurface Cross-Section(s) DocuSign Envelope ID: 4F8BDB79-C7FC-4A90-9EA8-8183393F2C3C LO E, L) 0 6. LU LU C) C\I LU LU W F— 0 z ro -- LO 0 Q0 Z U) LU -j z Lu --, 't LU LU r— < U) L) O(D Of LU = N �CY) LU U) < (L CD C/) N 0— CD (.C) CD aZ O CO EU LU ff U) Ei L) 0 E x 2 CL CL a) z :i 0 U z F- ui w LU 0 cn Z 2 z M :3 LU F- z LU F- LU LU M LU F- 0 cn z z LU 0 in 0 cn DocuSign Envelope ID: 4F8BDB79-C7FC-4A90-9EA8-8183393F2C3C a a W IL W U y r .. ... :.. ... ... ... . 0 .. .. .. o o' .. c �..' ... m o N _ m N Z.. Lu � LU t u a W N o m� z Y H U() rn co in U WCO 00 s�m�< mmaw� F] [Aaw�oo i N J wz�z " 01 �a zAl 2 DocuSign Envelope ID: 4F8BDB79-C7FC-4A90-9EA8-8183393F2C3C Appendix B — Field Operations Reference Notes for Boring Logs Exploration Procedure - Standard Penetration Testing Boring Logs DocuSign Envelope ID: 4F8BDB79-C7FC-4A90-9EA8-8183393F2C3C ECS REFERENCE NOTES FOR BORING LOGS MATERIAL` ASPHALT CONCRETE ode, GRAVEL TOPSOIL VOID BRICK ri do AGGREGATE BASE COURSE GW WELL -GRADED GRAVEL + gravel -sand mixtures, little or no fines Qd GP POORLY -GRADED GRAVEL gravel -sand mixtures, little or no fines ® GM SILTY GRAVEL gravel -sand -silt mixtures GC CLAYEY GRAVEL gravel -sand -clay mixtures �6 • SW WELL -GRADED SAND a gravelly sand, little or no fines SP POORLY -GRADED SAND gravelly sand, little or no fines SM SILTY SAND sand -silt mixtures SC CLAYEY SAND sand -clay mixtures ML SILT non -plastic to medium plasticity MH ELASTIC SILT high plasticity CL LEAN CLAY low to medium plasticity CH FAT CLAY high plasticity OL ORGANIC SILT or CLAY non -plastic to low plasticity OH ORGANIC SILT or CLAY high plasticity PT PEAT 1� r highly organic soils DRILLING SAMPLING SYMBOLS & ABBREVIATIONS SS Split Spoon Sampler PM Pressuremeter Test ST Shelby Tube Sampler RD Rock Bit Drilling WS Wash Sample RC Rock Core, NX, BX, AX BS Bulk Sample of Cuttings REC Rock Sample Recovery % PA Power Auger (no sample) RQD Rock Quality Designation % HSA Hollow Stem Auger PARTICLE SIZE IDENTIFICATION DESIGNATION PARTICLE SIZES Boulders 12 inches (300 mm) or larger Cobbles 3 inches to 12 inches (75 mm to 300 mm) Gravel: Coarse '/4 inch to 3 inches (19 mm to 75 mm) Fine 4.75 mm to 19 mm (No. 4 sieve to inch) Sand: Coarse 2.00 mm to 4.75 mm (No. 10 to No. 4 sieve) Medium 0.425 mm to 2.00 mm (No. 40 to No. 10 sieve) Fine 0.074 mm to 0.425 mm (No. 200 to No. 40 sieve) Silt & Clay ("Fines") <0.074 mm (smaller than a No. 200 sieve) COHESIVE SILTS & CLAYS UNCONFINED COMPRESSIVE SPT5 CONSISTENCY? STRENGTH, QP4 (BPF) (COHESIVE) <0.25 <3 Very Soft 0.25 - <0.50 3-4 Soft 0.50 - <1.00 5-8 Firm 1.00 - <2.00 9 - 15 Stiff 2.00 - <4.00 16 - 30 Very Stiff 4.00 - 8.00 31 - 50 Hard >8.00 >50 Very Hard GRAVELS, SANDS & NON -COHESIVE SILTS SPT5 DENSITY <5 Very Loose 5-10 Loose 11 - 30 Medium Dense 31 - 50 Dense >50 Very Dense FILL RELATIVE AMOUNT COARSE GRAINED (%)$ FINE GRAINED (%)$ Trace <5 <5 With 10 - 20 10 - 25 Adjective 25 - 45 30 - 45 (ex: "Silty') WATER LEVELS6 WL (First Encountered) WL (Completion) WL (Seasonal High Water) WL (Stabilized) FILL AND ROCK SSIBLE FILL PROBABLE FILL ROCK 'Classifications and symbols per ASTM D 2488-17 (Visual -Manual Procedure) unless noted otherwise. 2To be consistent with general practice, "POORLY GRADED" has been removed from GP, GP -GM, GP -GC, SP, SP-SM, SP-SC soil types on the boring logs. 3Non-ASTM designations are included in soil descriptions and symbols along with ASTM symbol [Ex: (SM-FILL)]. 4Typically estimated via pocket penetrometer or Torvane shear test and expressed in tons per square foot (tsf). 5Standard Penetration Test (SPT) refers to the number of hammer blows (blow count) of a 140 lb. hammer falling 30 inches on a 2 inch OD split spoon sampler required to drive the sampler 12 inches (ASTM D 1586). "N-value" is another term for "blow count' and is expressed in blows per foot (bpf). SPT correlations per 7.4.2 Method B and need to be corrected if using an auto hammer. °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 granular soils. In clay and cohesive silts, the determination of water levels may require several days for the water level to stabilize. In such cases, additional methods of measurement are generally employed. Minor deviation from ASTM D 2488-17 Note 14. $Percentages are estimated to the nearest 5 % per ASTM D 2488-17. Reference Notes for Boring Logs (1-29-2021).doc © 2021 ECS Corporate Services, LLC. All Rights Reserved DocuSign Envelope ID: 4F8BDB79-C7FC-4A90-9EA8-8183393F2C3C SUBSURFACE EXPLORATION PROCEDURE: STANDARD PENETRATION TESTING (SPT) ASTM D 1586 Split -Barrel Sampling Standard Penetration Testing, or SPT, is the most frequently used subsurface exploration test performed worldwide. This test provides samples for identification purposes, as well as a measure of penetration resistance, or N-value. The N-Value, or blow counts, when corrected and correlated, can approximate engineering properties of soils used for geotechnical design and engineering purposes. ECS provides Boring Location Diagrams Involves driving a hollow tube (split -spoon) and Boring Logs for into the ground by dropping a 140-lb hammer a height of 30-inches at desired depth each project! Recording the number of hammer blows re- quired to drive split -spoon a distance of 12 inches (in 3 or 4 Increments of 6 inches each) Auger is advanced* and an additional SPT is performed One SPT typically performed for every two to five feet Obtain two-inch diameter soil sample *Drilling Methods May Vary— The predominant drilling methods used for SPT are open hole fluid rotary drilling and hollow -stem auger drilling. C PA DocuSign Envelope ID: 4F8BDB79-C7FC-4A90-9EA8-8183393F2C3C CLIENT: Boddie Noell Enterprises, Inc PROJECT NO.: 06:24656 BORING NO.: B-01 SHEET: 1 of 1 PROJECT NAME: DRILLER/CONTRACTOR: Hardee's, Bunn, INC Quantex, Inc. SITE LOCATION: 420 South Main Street, Bunn, North Carolina 27508 LOSS OF CIRCULATION IDOL NORTHING: EASTING: STATION: SURFACE ELEVATION: BOTTOM of cnslNo ' 804460.5 2221626.6 279.0 01� — Plastic Limit Water Content Liquid Limit m w z z LL x o L`l a_ } w Z ® STANDARD PENETRATION BLOWS/FT = z w DESCRIPTION OF MATERIAL ROCK QUALITY DESIGNATION &RECOVERY w a a Q w m RQD QQ w w REC O CALIBRATED PENETROMETER TON/SF n n [FINES CONTENT] % Topsoil Thickness[3.00"] 7.7.7 (SM) SILTY SAND, tan, orange, moist, S-1 SS 18 18 medium dense, petroleum odor (14) 14 11-12-14 S-2 SS 18 18 (26) 26 5- 274 s-s-s (CL) SANDY LEAN CLAY, light tan, orange, S-3 SS 18 18 (10) 10 moist, stiff 7-6-7 S-4 SS 18 18 (is) 13 10 269 END OF DRILLING AT 10.0 FT 15 264 20 259 25 254 30 249 THE STRATIFICATION LINES REPRESENTTHE APPROXIMATE BOUNDARY LINES BETWEEN SOILTYPES. IN -SITU THE TRANSITION MAY BE GRADUAL SZ WL (First Encountered) BORING STARTED: Sep 03 2021 CAVE IN DEPTH: 8.50 1 WL (Completion) DRY BORING Sep 03 2021 COMPLETED: HAMMER TYPE: Auto 7 WL (Seasonal High Water) EQUIPMENT: LOGGED GeoProbe �RIEZ BY: DRILLING METHOD: 2.25" HSA IZ WL (Stabilized) GEOTECHNICAL BOREHOLE LOG DocuSign Envelope ID: 4F8BDB79-C7FC-4A90-9EA8-8183393F2C3C CLIENT: Boddie Noell Enterprises, Inc PROJECT NO.: 06:24656 BORING NO.: B-02 SHEET: 1 of 1 PROJECT NAME: DRILLER/CONTRACTOR: Hardee's, Bunn, INC Quantex, Inc. SITE LOCATION: 420 South Main Street, Bunn, North Carolina 27508 LOSS OF CIRCULATION IDOL NORTHING: EASTING: STATION: SURFACE ELEVATION: sorroN of cnslNo ' 804379.4 2221626.1 279.0 01� — Plastic Limit Water Content Liquid Limit m w z z LL x o L`l a_ } w Z ® STANDARD PENETRATION BLOWS/FT = z w DESCRIPTION OF MATERIAL ROCK QUALITY DESIGNATION &RECOVERY w a a Q w m RQD QQ w w REC O CALIBRATED PENETROMETER TON/SF n n [FINES CONTENT] % Topsoil Thickness[3.00"] g_g_g (SM) SILTY SAND, light gray, moist, S 1 SS 18 18 medium dense, petroleum odor (17) 17 (CL) SANDY LEAN CLAY, orange, brown, S-2 SS 18 18 black, moist, stiff 5-6-6 (12) 12 5 274 6-5-5 S-3 SS 18 18 (10) a (SC) CLAYEY SAND, tan, orange, moist, S-4 SS 18 18 medium dense s-6) (16) is 10 269 7-7-8 S-5 SS 18 18 (1s) 5 15 264 i 74 -9 S-6 SS 18 18 (17) „ 20 259 END OF DRILLING AT 20.0 FT 25 254 30 249 THE STRATIFICATION LINES REPRESENT THE APPROXIMATE BOUNDARY LINES BETWEEN SOIL TYPES. IN -SITU THE TRANSITION MAY BE GRADUAL SZ WL (First Encountered) BORING STARTED: Sep 03 2021 CAVE IN DEPTH: 18.50 1 WL (Completion) 16.50 BORING Sep 03 2021 COMPLETED: HAMMER TYPE: Auto 7 WL (Seasonal High Water) EQUIPMENT: LOGGED GeoProbe REZ BY: DRILLING METHOD: 2.25" HSA �Z WL (Stabilized) GEOTECHNICAL BOREHOLE LOG DocuSign Envelope ID: 4F8BDB79-C7FC-4A90-9EA8-8183393F2C3C CLIENT: Boddie Noell Enterprises, Inc PROJECT NO.: 06:24656 BORING NO.: B-03 SHEET: 1 of 1 PROJECT NAME: DRILLER/CONTRACTOR: Hardee's, Bunn, INC Quantex, Inc. SITE LOCATION: 420 South Main Street, Bunn, North Carolina 27508 LOSS OF CIRCULATION IDOL NORTHING: EASTING: STATION: SURFACE ELEVATION: BOTTOM of cnslNo ' 804380.9 2221693.2 280.0 01� — Plastic Limit Water Content Liquid Limit m w z z LL x o L`l a_ } w Z ® STANDARD PENETRATION BLOWS/FT = z w DESCRIPTION OF MATERIAL ROCK QUALITY DESIGNATION &RECOVERY w a a Q w m RQD QQ w w REC O CALIBRATED PENETROMETER TON/SF n n [FINES CONTENT] % Topsoil Thickness[3.00"] 6 s (SC) CLAYEY SAND, gray, tan, orange, S-1 SS 18 18 moist, medium dense, petroleum odor (12) 18 v 3A ��4 [36.7r] 5-6-7 S-2 SS 18 18 (13) 13 5 275 7-9-11 S-3 SS 18 18 (zo) zo 6-6-7 S-4 SS 18 18 (13) 13 10 270 END OF DRILLING AT 10.0 FT 15 265 20 260 25 255 30 250 THE STRATIFICATION LINES REPRESENTTHE APPROXIMATE BOUNDARY LINES BETWEEN SOILTYPES. IN -SITU THE TRANSITION MAY BE GRADUAL SZ WL (First Encountered) BORING STARTED: Sep 03 2021 CAVE IN DEPTH: 8.50 1 WL (Completion) DRY BORING Sep 03 2021 COMPLETED: HAMMER TYPE: Auto 7 WL (Seasonal High Water) EQUIPMENT: LOGGED GeoProbe REZ BY: DRILLING METHOD: 2.25" HSA SrZ WL (Stabilized) GEOTECHNICAL BOREHOLE LOG DocuSign Envelope ID: 4F8BDB79-C7FC-4A90-9EA8-8183393F2C3C CLIENT: Boddie Noell Enterprises, Inc PROJECT NO.: 06:24656 BORING NO.: B-04 SHEET: 1 of 1 PROJECT NAME: DRILLER/CONTRACTOR: Hardee's, Bunn, INC Quantex, Inc. SITE LOCATION: 420 South Main Street, Bunn, North Carolina 27508 LOSS OF CIRCULATION IDOL NORTHING: EASTING: STATION: SURFACE ELEVATION: BOTTOM of cnslNo ' 804340.5 2221590.0 277.0 01� — Plastic Limit Water Content Liquid Limit m w z z LL x o L`l a_ } w Z ® STANDARD PENETRATION BLOWS/FT = z w DESCRIPTION OF MATERIAL ROCK QUALITY DESIGNATION &RECOVERY w a a Q w m RQD QQ w w REC O CALIBRATED PENETROMETER TON/SF n n [FINES CONTENT] % Topsoil Thickness[3.00"] 8-9-7 (ML) SANDY SILT, gray, tan, orange, S-1 SS 18 18 moist, very stiff to stiff (16) 6 7-8-8 S-2 SS 18 18 (16) 6 5 272 6-7-7 S-3 SS 18 18 (14) 14 (MH) SANDY ELASTIC SILT, tan, orange, S-4 SS 18 18 pink, moist, stiff 6-7-8 (15) Ts 10 267 4-5-5 S-5 SS 18 18 (10) a 15 262 i 4-5-5 S 6 SS 18 18 (10) 10: 20 257 END OF DRILLING AT 20.0 FT 25 252 30 247 THE STRATIFICATION LINES REPRESENT THE APPROXIMATE BOUNDARY LINES BETWEEN SOIL TYPES. IN -SITU THE TRANSITION MAY BE GRADUAL SZ WL (First Encountered) BORING STARTED: Sep 03 2021 CAVE IN DEPTH: 18.50 1 WL (Completion) 16.50 BORING Sep 03 2021 COMPLETED: HAMMER TYPE: Auto 7 WL (Seasonal High Water) EQUIPMENT: LOGGED GeoProbe �RIEZ BY: DRILLING METHOD: 2.25" HSA IZ WL (Stabilized) GEOTECHNICAL BOREHOLE LOG DocuSign Envelope ID: 4F8BDB79-C7FC-4A90-9EA8-8183393F2C3C CLIENT: Boddie Noell Enterprises, Inc PROJECT NO.: 06:24656 BORING NO.: B-05 SHEET: 1 of 1 PROJECT NAME: DRILLER/CONTRACTOR: Hardee's, Bunn, INC Quantex, Inc. SITE LOCATION: 420 South Main Street, Bunn, North Carolina 27508 LOSS OF CIRCULATION IDOL NORTHING: EASTING: STATION: SURFACE ELEVATION: BOTTOM of cnslNo ' 804346.0 2221506.8 275.0 01� — Plastic Limit Water Content Liquid Limit m w z z LL x o L`l a_ } w Z ® STANDARD PENETRATION BLOWS/FT = z w DESCRIPTION OF MATERIAL ROCK QUALITY DESIGNATION &RECOVERY w a a Q w m RQD QQ w w REC O CALIBRATED PENETROMETER TON/SF n n [FINES CONTENT] % Topsoil Thickness[3.00"] 7-8-8 (ML) SANDY SILT, gray, tan, moist, very S-1 SS 18 18 stiff (16) 6 (CL) SANDY LEAN CLAY, gray, orange, tan, S-2 SS 18 18 moist, very stiff to stiff 6(171a 17) n 5 270 6-5-8 S-3 SS 18 18 (16) is 6-5-6(11� S-4 SS 18 18 10 265 END OF DRILLING AT 10.0 FT 15 260 20 255 25 250 30 245 THE STRATIFICATION LINES REPRESENTTHE APPROXIMATE BOUNDARY LINES BETWEEN SOILTYPES. IN -SITU THE TRANSITION MAY BE GRADUAL SZ WL (First Encountered) BORING STARTED: Sep 03 2021 CAVE IN DEPTH: 8.50 1 WL (Completion) DRY BORING Sep 03 2021 COMPLETED: HAMMER TYPE: Auto 7 WL (Seasonal High Water) EQUIPMENT: LOGGED GeoProbe REZ BY: DRILLING METHOD: 2.25" HSA �Z WL (Stabilized) GEOTECHNICAL BOREHOLE LOG DocuSign Envelope ID: 4F8BDB79-C7FC-4A90-9EA8-8183393F2C3C CLIENT: Boddie Noell Enterprises, Inc PROJECT NO.: 06:24656 BORING NO.: B-06 SHEET: 1 of 1 PROJECT NAME: DRILLER/CONTRACTOR: Hardee's, Bunn, INC Quantex, Inc. SITE LOCATION: 420 South Main Street, Bunn, North Carolina 27508 LOSS OF CIRCULATION IDOL NORTHING: EASTING: STATION: SURFACE ELEVATION: BOTTOM of cnslNo ' 804268.9 2221582.2 276.0 01� — Plastic Limit Water Content Liquid Limit m w z z LL x o L`l a_ } w Z ® STANDARD PENETRATION BLOWS/FT = z w DESCRIPTION OF MATERIAL ROCK QUALITY DESIGNATION &RECOVERY w a a Q w m RQD QQ w w REC O CALIBRATED PENETROMETER TON/SF n n [FINES CONTENT] % Topsoil Thickness[3.00"] 6-7-7 (ML) SANDY SILT, dark gray, brown, S-1 SS 18 18 moist, stiff (14) 14 (SC) CLAYEY SAND, gray, orange, red, S-2 SS 18 18 moist, medium dense 8910 zsx s� 5 271 7-8-9 S-3 SS 18 18 (17) 9-8-9 S-4 SS 18 18 (17) 10 266 END OF DRILLING AT 10.0 FT 15 261 20 256 25 251 30 246 THE STRATIFICATION LINES REPRESENTTHE APPROXIMATE BOUNDARY LINES BETWEEN SOILTYPES. IN -SITU THE TRANSITION MAY BE GRADUAL SZ WL (First Encountered) BORING STARTED: Sep 03 2021 CAVE IN DEPTH: 8.50 1 WL (Completion) DRY BORING Sep 03 2021 COMPLETED: HAMMER TYPE: Auto 7 WL (Seasonal High Water) EQUIPMENT: LOGGED GeoProbe REZ BY: DRILLING METHOD: 2.25" HSA �Z WL (Stabilized) GEOTECHNICAL BOREHOLE LOG DocuSign Envelope ID: 4F8BDB79-C7FC-4A90-9EA8-8183393F2C3C Appendix C — Laboratory Testing Laboratory Testing Summary mes)nEm¥ope ID: 4SBDe $c734A9ogEA $B1gma9cc e �/ / / rz 0 O u to m 2 i Z5' u \ { \ . o w k k 2 / E m \ G r 2 ) ' 0 § \OP - o I f 2 4 2 p 4-1 2 \ » § \ \ \ _ u \ g o ; � a k � \ / _ LU r I \ \ \ ¥ e } j - \ $ i ƒ / d \ Ci / ! ) $ / - k _ � � \ { i 0 ^\ \ \ O e � 5 ^ � / \ _ Ln Ln \ \ d d \ m 2 � 9 \ ` 7 ƒ \ / 4� � g } / o e » CL / ƒ » 2 e ¥ § rm m $ W s � \ \ \ e @ E aJ \ \ \ to m2 C o I Ln Ln � z d k § � E 41 2 7/ m z )/ w w ° �41 2 2 0 0. ■