4. A soil sample was taken to the lab and prepared for sieving. The technician sieved the soil and performed Atterberg limit tests on the finer fraction of that

soil (passing the # 40 sieve). These were found to be 80 and 30. The sieving data for the soil are presented below.

sieve

mass of

mass

sieve + soil

(gr)

(gr)

20 139.22

139.32

136.75

265.40

4.75 122.10

158.33

2 121.05

162.39

0.85 115.65

138.91

0.42 112.12

128.54

0.25

110.77

121.34

0.15

109.56 117.99

0.075

108.10

118.20

77.50

137.98

d

sieve # (mm)

20mm

6.4mm 6.4

4

10

20

40

60

100

200

pan

a. Use Excel to Plot the GSD of the soil.

b. Use the USCS to classify the soil (show work). Provide the group symbol.