2012-04-10_REVISION - M1981185 (43)

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Group Symbol Group Name Group Symbol Group Name GW Well- graded gravel SW Well- graded sand GP Poorly- graded gravel SP Poorly- graded sand GM Silty gravel SM Silty sand GC Clayey gravel SC Clayey sand GW -GM Well- graded gravel with silt SW -SM Well- graded sand with silt GW -GC Well- graded gravel with clay SW -SC Well-graded sand with clay GP -GM Poorly- graded gravel with silt SP -SM Poorly- graded sand with silt GP -GC Poorly- graded gravel with clay SP -SC Poorly- graded sand with clay CL Lean clay CH Fat clay ML Silt MH Elastic Silt OL Organic clay /silt OH Organic clay /silt Key to Boring and Test Pit Log Symbols and Abbreviations Notes Refer to Figure 2 for boring and test pit locations Blow counts converted to Standard Penetration Test (split -spoon sampler) where appropriate Atterberg Limits test used to determine if soil is silt or clay, where possible. Graphic Log descriptions included on Page 3 Abbreviations ASTM — American Society for Testing and Materials U.S.C.S. — Unified Soil Classification System RWB — Roadway Boring RWTP — Roadway Test Pit RWBUTP — Roadway Buttress Test Pit RWGUTP — Roadway Gabion Test Pit TP — Test Pit Log Sampling MC — California sampler symbol SS — Standard Penetration Test (Split Spoon sampler) symbol AU — Auger cuttings sample symbol GB — Grab sample N — Blow counts per 6 inches (N) — Blow counts per foot Testing w — Moisture Content, percent DD — Dry Density, pounds per cubic foot LL — Liquid Limit, PI — Plasticity Index: Atterberg Limit test results (moisture content) UU Triaxial — unconsolidated, undrained triaxial compression test (ASTM D 2850- 03a(2007)) Compaction — modified Proctor compaction test (ASTM D 1557 -09) Unified Soil Classifications (ASTM D2487 -11) Page 1of3