WILLMER ENGINEERING INC. Willmer Project No Prepared for. Clark Patterson Lee Suwanee, Georgia. Prepared by

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1 SOIL SURVEY REPORT (Revised March 6, 2013) New Hospital Connector Road GDOT Project No. CSSTP (276), PI No Duluth, Gwinnett County, Georgia WILLMER ENGINEERING INC. Willmer Project No Prepared for Clark Patterson Lee Suwanee, Georgia Prepared by Willmer Engineering Inc Pleasantdale Road Suite 165 Atlanta, Georgia

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3 Soil Survey Report New Hospital Connector Road (Revised March 6, 2013) GDOT Project No. CSSTP (276), PI No Gwinnett County, Georgia Willmer Project No Page 2 Attachments: Soil Survey Summary Figures Figure 1: Project Location Map Figure 2: Project Alignment Map Appendix I Benching Detail Pipe Culvert Material Alternates Appendix II Boring Record Legend Unified Soil Classification System Reference Sheet Record of Soil Survey Borings Appendix III Laboratory Data Summary Appendix IV Site Photographs

4 Soil Survey Report New Hospital Connector Road (Revised March 6, 2013) GDOT Project No. CSSTP (276), PI No Gwinnett County, Georgia Willmer Project No Page 3 SOIL SURVEY SUMMARY For New Hospital Connector Road GDOT Project No. CSSTP (276), PI No Duluth, Gwinnett County, Georgia 1. Location / Description This project is for the construction of the proposed New Hospital Connector Road between the roundabout interchange at West Lawrenceville Road and McClure Bridge Road, and State Route 120 within the city limits of Duluth, Gwinnett County, Georgia. The project begins at Station and continues approximately 1,245.5 feet northeast to Station The project includes new construction of a two lane road and concrete median. The location of the project is shown in Figure 1, and a project alignment map is presented in Figure Geology The project alignment is geologically sited within the Piedmont Physiographic Province of Georgia and is underlain by metagraywacke and mica schist rock formations. The types of rock within these formations include partially metamorphosed sedimentary rocks and mica schist. 3. Rock No rock was encountered above the proposed grade. 4. Removal No material requiring removal was encountered. 5. Waste None of the soils encountered on this project will require wasting. However, high-volume change Class IIIC2 materials excavated from the following areas should not be placed within three feet of the bottom of the subgrade directly beneath the pavement section: Station to Station Location ± to ± Center, Left, and Right These soils may be used in the bottom of high fill sections, or used to flatten side slopes as directed by the Engineer. This work shall be done in accordance with Special Provision Subgrade Materials 7. Pavement Design No additional subgrade materials will be required for this project. The pavement design for this project should include a minimum of 10 inches of graded aggregate base (GAB). We recommend an additional 4 inches of GAB to be set up for use at the direction of the Engineer in the following areas: Station to Station Location ± to ± Center, Left, and Right

5 Soil Survey Report New Hospital Connector Road (Revised March 6, 2013) GDOT Project No. CSSTP (276), PI No Gwinnett County, Georgia Willmer Project No Page 4 8. Pavement Design Values The following values are recommended for use in the pavement design calculations for the entire length of the project: Soil Support Value = 2.0 Regional Factor = 1.8 Subgrade Reaction Modulus, k = 110 pci Graded aggregate base is the only base material recommended for use on this project. 9. Slopes Maximum 2:1 slopes will be safe for this project. 10. Ground Water Groundwater was not encountered above the proposed grades at any of the boring locations at the time of the geotechnical investigation. 11. Shrinkage We recommend an average shrinkage factor of 25% for use in the earthwork calculations for this project. 12. Culvert We recommend that a 12-inch blanket of Type II Foundation Backfill material be placed under the barrel of all culverts. 13. Bench Detail Where new fills are to be placed on existing slopes steeper than 3:1, the existing slope should be benched in accordance with the attached detail. 14. Corrosion Reference should be made to the attached Pipe Culvert Material Alternates chart for materials allowable in Appendix I. Electrical resistivity and ph values used are GDOT default values for Gwinnett County. 15. Special Problems Reported By: Reviewed By: Several residences are located very close to the construction limits of this project. Vibrations from construction may cause some concern with property owners. We recommend that the Project Engineer contact the Geotechnical Engineering Bureau prior to construction to evaluate the need for crack surveys. Daniel C. Pitts, EIT / Thomas E. Scruggs, PE James L. Willmer, PE

6 Revised :September 24, 2009 DEPARTMENT OF TRANSPORATION STATE OF GEORGIA SPECIAL PROVISION PROJECT NO. CSSTP (276), GWINNETT P.I. NO SECTION 205 ROADWAY EXCAVATION Add the following to Sub-section E: The soils that will be excavated from the following cut sections are primarily Class IIIC2 soils with poor load carrying characteristics. Do not place these soils within 3 feet (915 mm) of the subgrade directly beneath the pavement in fill sections. These soils may be placed in the bottom of high fill sections or used to flatten slopes as directed by the Engineer: Station to Station Location ± to ± Center, Left, and Right Office of Materials and Testing

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10 APPENDIX I

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12 ph 6 Resistivity Project No.: CSSTP (276) County: Gwinnett P.I. No.: S T O R M D R A I N TYPE OF PIPE INSTALLATION LONGITUDINAL INTERSTATE AND TRAVEL BEARING LONGITUDINAL NON- INTERSTATE AND NON- TRAVEL BEARING C R O S S D R A I N GRADE < 10% GRADE > 10% Pipe Culvert Material Alternates For Piedmont/Blue Ridge Region C O N C R E T E X X X X X X X ADT < 250 X X X X X X 250 < ADT < 1,500 X X* X X X X 1,500 < ADT < 15,000 X X X X ADT > 15,000 X CORRUGATED STEEL AASHTO M-36 ALUMINUM COATED (TYPE 2) CORR. STEEL PLAIN ZINC COATED CORRU- GATED ALUMINUM AASHTO M-196 PLAIN UNCOATED ALUMINUM CORR. POLY- ETHYLENE AASHTO M-252 CORR. POLY- ETHYLENE SMOOTHED LINED AASHTO M-294 TYPE "S" PLASTIC POLY VINYL CHLORIDE (PVC) PROFILE WALL AASHTO M-304 POLY VINYL CHLORIDE (PVC) CORRUGATED SMOOTH INTERIOR ASTM F-949 ADT < 250 X X X X X ADT > 250 X X X X SIDE DRAIN PERMANENT SLOPE DRAIN PERFORATED UNDERDRAIN X X X X X X X X X X X X X X X X X X * This type pipe can be used if the addition of Type "B" Coating (AASHTO M-190, Half Bituminous Coated with Paved Invert) is utilized. NOTES: 1 Allowable materials are indicated by an "X". 2 Structural requirements of storm drain pipe will be in accordance with Georgia Standard 1030-D or 1030-P, whichever is applicable, and the Standard Specifications. 3 Graded aggregate backfill shall be used in cross drain applications for all plastic pipes (AASHTO M-294, HDPE pipe; AASHTO M-304, PVC pipe; ASTM F-949, PVC pipe). 4 The Contractor shall provide additional storm sewer capacity calculations if a pipe material other than concrete is selected. 5 Pipe used under mechanically stabilized earth (MSE) walls, within MSE wall backfill, or within five feet of an MSE wall face shall be Class V Concrete Pipe. 6 Project specific ph and Resistivity values are entered into the respective boxes above to determine allowable pipe materials. Rev

13 APPENDIX II

14 BORING RECORD LEGEND SM, CL, etc: - GROUP SYMBOL based on Unified Soil Classification System. (Refer to ASTM D-2488 and Table 1 of D-2487) N-VALUE: BLOWS PER FOOT- Standard Penetration Resistance (SPT) blow count, the sum of the second and third 6-inch increments of the SPT test. (Refer to ASTM D-1586) CONSISTENCY / RELATIVE DENSITY Correlated with SPT Blow Count, N: N (blows per foot) SILTS AND CLAYS Consistency 0-2 Very Soft 3-4 Soft 5-8 Firm 9-15 Stiff Very Stiff SANDS N (blows per foot) Relative Density 0-4 Very Loose 5-10 Loose Medium Dense Dense > 50 Very Dense Hard > 50 Very Hard NOTES: Groundwater Measurements: Water level at time of backfilling Water level at time of boring Caved level at 24 hours ASPHALT CONCRETE TOPSOIL FILL GW GP GM GC SW SP SM SC SANDY SILT SANDY CLAY ML MH CL-ML CL CH OL OH PEAT PWR ROCK

15 Willmer Engineering Inc Pleasantdale Road, Suite 165 Atlanta, Georgia UNIFIED SOIL CLASSIFICATION SYSTEΜ REFERENCE SHEET MAJOR DIVISIONS LETTER SYMBOL TYPICAL DESCRIPTIONS GRAVEL AND GRAVELLY SOILS CLEAN GRAVELS LITTLE OR NO FINES (GW) (GP) WELL-GRADED GRAVELS, GRAVEL-SAND MIXTURES, LITTLE OR NO FINES POORLY GRADED GRAVELS, GRAVEL-SAND MIXTURES, LITTLE OR NO FINES COARSE GRAINED SOILS MORE THAN 50% OF COARSE FRACTION RETAINED #4 SIEVE GRAVELS WITH FINES APPRECIABLE AMOUNT OF FINES (GM) (GC) SILTY GRAVELS and GRAVEL-SAND-SILT MIXTURES CLAYEY GRAVELS and GRAVEL-SAND-CLAY MIXTURES MORE THAN 50% OF MATERIAL IS LARGER THAN #200 SIEVE SIZE SAND AND SANDY SOILS CLEAN SAND LITTLE OR NO FINES (SW) (SP) WELL GRADED SANDS, GRAVELLY SANDS, LITTLE OR NO FINES POORLY GRADED SANDS, GRAVELLY SANDS, LITTLE OR NO FINES FINE GRAINED SOILS MORE THAN 50% OF COARSE FRACTION PASSING #4 SIEVE SILTS AND CLAYS LIQUID LIMIT LESS THAN 50 SANDS WITH FINES APPRECIABLE AMOUNT OF FINES (SM) (SC) (ML) (CL) (OL) SILTY SANDS and SAND-SILT MIXTURES CLAYEY SANDS and SAND-CLAY MIXTURES INORGANIC SILTS AND VERY FINE SANDS, ROCK FLOUR, SILTY OR VERY FINE SANDS OR CLAYEY SILTS WITH SLIGHT PLASTICITY INORGANIC CLAYS OF LOW TO MEDIUM PLASTICITY, GRAVELLY CLAYS, SANDY CLAYS, SILTY CLAYS, LEAN CLAYS ORGANIC SILTS AND ORGANIC SILTY CLAYS OF LOW PLASTICITY MORE THAN 50% OF MATERIAL IS SMALLER THAN #200 SIEVE SIZE SILTS AND CLAYS LIQUID LIMIT GREATER THAN 50 (MH) (CH) (OH) INORGANIC ELASTIC SILTS, MICACEOUS OR DIATOMACEOUS FINE SANDY OR SILTY SOILS INORGANIC CLAYS OF HIGH PLASTICITY, FAT CLAYS ORGANIC CLAYS OF MEDIUM TO HIGH PLASTICITY, ORGANIC SILTS HIGHLY ORGANIC SOILS (PT) PEAT, HUMUS, SWAMP SOILS WITH HIGH ORGANIC CONTENTS H:\\Word Processing\Admin\Forms\Unified Soil Classification System Reference Sheet.doc

16 Record of Soil Survey Borings New Hospital Connector Road Duluth, Gwinnett County, Georgia GDOT Project Number CSSTP (276), PI No Willmer Engineering Project No Station Boring No. Offset (feet) Left Right Depth Soil Description Sample No SS-1-CL " Reddish Brown SILT -- IIIC Subsoil Same as SS-3-CL Soil Class Water Table Depth (feet) Boring Term. Depth (feet) Notes / Comments SS-2-CL ' Reddish Brown SILT -- IIIC Subsoil Similar to SS-3-CL 10'-20' Reddish Brown Medium to Fine Sandy SILT SS-2-CL IIIC SS-3-CL ' Reddish Brown SILT SS-3-CL IIIC SS-4-CL ' Brown Silty Coarse to Fine SAND SS-4-CL IIB Notes: (i) All offsets are from proposed construction centerline unless noted otherwise. (ii) All depths are from existing ground surface unless noted otherwise. Page 1 of 1

17 APPENDIX III

18 Project: New Hospital Connector Road Project Location: Duluth, Gwinnett County,Georgia Supervisor: DP Prime Consultant: Clark Patterson Lee Willmer Project No.: GDOT Project No.: CSSTP (276) Station: , CL Sample No.: SS-2-CL (15-20 ft) Soil Desc.: Reddish brown medium to fine sandy SILT (micaceous) Station: , CL Sample No.: SS-3-CL (0-10 ft) Soil Desc.: Reddish brown SILT Station: , CL Sample No.: SS-4-CL (0-5 ft) Soil Desc.: Brown silty coarse to fine SAND GDOT Soil Class: IIIC1 GDOT Soil Class: IIIC2 GDOT Soil Class: IIB3 P 100 E R 90 C E 80 N 1.5" 3/4" " 3/4" " 3/4" T F I 60 N E R B 40 Y 30 W EI G HT G.S.(mm) 100 % F i n e r " Sieve 3/4" Sieve No. 10 Sieve No. 40 Sieve No. 60 Sieve No. 200 Sieve Clay Content (%) Total Volume Change (%) Swell (%) Shrinkage (%) Maximum Dry Density (pcf) Opt. Moisture Content (%) Nat. Moisture Content (%) Liquid Limit (%) Plasticity Index (%) Erosion Index Soil Support Value % F i n e r " Sieve 3/4" Sieve No. 10 Sieve No. 40 Sieve No. 60 Sieve No. 200 Sieve Clay Content (%) Total Volume Change (%) Swell (%) Shrinkage (%) Maximum Dry Density (pcf) Opt. Moisture Content (%) Nat. Moisture Content (%) Liquid Limit (%) Plasticity Index (%) Erosion Index Soil Support Value % F i n e r " Sieve 3/4" Sieve No. 10 Sieve No. 40 Sieve No. 60 Sieve No. 200 Sieve Clay Content (%) Total Volume Change (%) Swell (%) Shrinkage (%) Maximum Dry Density (pcf) Opt. Moisture Content (%) Nat. Moisture Content (%) Liquid Limit (%) Plasticity Index (%) Erosion Index Soil Support Value Page 1 of 1

19 APPENDIX IV

20 Site Photographs - Soil Survey Report New Hospital Connector Road GDOT Project No. CSSTP (276), PI No Gwinnett County, Georgia Willmer Project No Sheet 1of 2 From Station Facing SS-1-CL From Station Facing SS-3-CL

21 Site Photographs - Soil Survey Report New Hospital Connector Road GDOT Project No. CSSTP (276), PI No Gwinnett County, Georgia Willmer Project No Sheet 2of 2 From Station Facing SS-4-CL From Station Facing Southeast Along SR 120