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Rally's Stockton Work Plan 10 <br /> Project No. 91349.A <br /> For cohesionless soils (sands): <br /> 0 -5 blows per foot = very loose <br /> 6-12 = loose <br /> 13-38 = medium dense <br /> 39-65 = dense <br /> > 65 = very dense <br /> For cohesive soils (clays): <br /> 1 - 2 blows per foot = very soft <br /> 3 - 4 11 if = soft <br /> 5 - 8 = medium stiff <br /> 9 -1 7 = stiff <br /> 18-36 = very stiff <br /> 36-70 = hard <br /> > 70 = very hard <br /> 6.) Strength - Only for unconsolidated material; see page USCS-1 . <br /> 7.) Secondary components - These are not necessary for every description, but <br /> may be important in certain circumstances or if certain components are <br /> prominent or significant. The following may be included: <br /> - Grain size <br /> - Roundness <br /> - Sorting or grading <br /> - Types of structures <br /> - Degree and type of cementation <br /> - Degree of weathering or other alteration <br /> - Type of bedrock <br />