Foundation Engineering, Inc.Professional Geotechnical Services IMPORTANT INFORMATION AND SYMBOLS <br />EXPLORATION LOG KEY <br />DISTINCTION BETWEEN FIELD LOGS AND FINAL LOGS <br />A field log is prepared for each exploration by our field representative. The log contains information <br />concerning sampling depths and the presence of various materials such as gravel, cobbles, and fill, andobservations of groundwater. It also contains our interpretation of the soil conditions between samples. <br />The final logs presented in this report represent our interpretation of the contents of the field logs and theresults of the sample examinations and laboratory test results. Our recommendations are based on thecontents of the final logs and the information contained therein and not on the field logs. <br />VARIATION IN SOILS BETWEEN EXPLORATIONS <br />The final log and related information depict subsurface conditions only at the specific location and on the <br />date indicated. Those using the information contained herein should be aware that soil conditions at otherlocations or on other dates may differ. Actual foundation or subgrade conditions should be confirmed byFoundation Engineering during construction. <br />TRANSITION BETWEEN SOIL OR ROCK TYPES <br />The lines designating the interface between soil, fill or rock on the final logs and on subsurface profiles <br />presented in the report are determined by interpolation and are therefore approximate. The transitionbetween the materials may be abrupt or gradual. Only at boring or test pit locations should profiles beconsidered as reasonably accurate and then only to the degree implied by the notes thereon. <br />SS - 3 - 4 <br />Bottom of Sample Attempt <br />Unrecovered Portion <br />Exploration Number <br />Recovered Portion <br />Top of Sample Attempt <br />Sample Type <br />Sample Number <br />SAMPLE AND TEST SYMBOLS <br />C - Pavement Core Sample <br />CS - Rock Core Sample <br />OS - Oversize Sample (3-inch O.D. split-spoon) <br />S - Grab Sample <br />SH - Thin-walled Undisturbed Sample <br />SS - SPT Sample (2-inch O.D. split-spoon) <br />FIELD SHEAR STRENGTH TEST <br />Shear strength measurements on test pit side walls, <br />blocks of soil or undisturbed samples are typicallymade with Torvane or Field Vane shear devices. <br />Values reported as undrained shear strength (Su) in tsf. <br />TYPICAL SOIL/ROCK SYMBOLS <br />GROUNDWATER <br />Groundwater Location <br />Date of Measurement(1/31/21) <br />Concrete <br />Organics <br />Clay Gravel <br />Silt <br />Sand Sandstone <br />Basalt <br />Siltstone <br />Standard Penetration Test resistance equals the number <br />of blows a 140 lb. weight falling 30 in. is required to drive astandard split-spoon sampler 1 ft. Practical refusal is <br />equal to 50 or more blows per 6 in. of sampler penetration. <br />Water Content (%) <br />UNIFIED SOIL CLASSIFICATION SYMBOLS <br />G- Gravel <br />S - Sand <br />M - Silt <br />C - Clay <br />Pt - Peat <br />W - Well Graded <br />P - Poorly Graded <br />L - Low Plasticity <br />H - High Plasticity <br />O - Organic <br />SSSH