A standard penetration test has been conduted at a depth of $15$ ft in an $8-$inch diameter

exploratory boring using a USA$-$style safety hammer and a standard sampler. This test

produced an uncorrected N $-$value of $12.$ The soil inside the sampler was a fine$-$to$-$medium

sand with $D_{50}=0\mathrm{.}6mm.$ The vertical effective stress at this depth is $1100l\frac{b}{f}{t}^2.$ Adjust the N $-$

value as described in Class handout, then compute the relative density and classify the soil

using Table $3\mathrm{.}3.$A standard penetration test has been conduted at a depth of $15$ ft in an $8-$inch diameter

exploratory boring using a USA$-$style safety hammer and a standard sampler. This test

produced an uncorrected N $-$value of $12.$ The soil inside the sampler was a fine$-$to$-$medium

sand with $D_{50}=0\mathrm{.}6mm.$ The vertical effective stress at this depth is $1100l\frac{b}{f}{t}^2.$ Adjust the N $-$

value as described in Class handout, then compute the relative density and classify the soil

using Table $3\mathrm{.}3.$