_REVISION - M1977347 ‎(2)‎

• Permit No: M1977347
• IBM Index Class Name: Revision
• Doc Name: GEOTECHNICAL ENGINEERING REPORT
• Type & Sequence: AM1
• Media Type: D
• Archive: No

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UNIFIED SOIL CLASSIFICATION SYSTEM
Soil Classiticntlon
Criteria far Assigning Group Symbols end Group Names Using Laboratory Test!`
Group
Group Name'
Symbol
Coarse-Grained Gravels more than Cleen Gravels less
Cu > a end 1 < Cc <3'
GW
Well-
ratled
ravel"
Soils more than 50% of coarse than 5% finest g
g
50% retained on fraction retained on
No. 200 sieve Nq. 4 sieve Cu < a and/or 1 > Cc > 3° GP Poorly gratled gravel'
Gravels with Fines c
more than 12% lines Fines classily es ML or MH GM Silty gravel,G.H
Fines classily as CL or CH GC Clayey gravelr~LL"
Sands 50% or mare Cleen Sands Less Cu > 6 and 1 < Cc < 3E SW Well-graded sand'
of coarse Traction then 5% IinesE
passes No. 4 sieve Cu < 6 and/or 1 > Cc > 3` SP Poorly graded sand'
Sands with Fines Fines classily as ML or MH SM Silty sand°"''
more than 72%fines°
Fnes classily as CL or CH SC Clayey sand°xi

Fine-Grained Soils Sills and Clays inorganic PI > 7 and plots on or abgve 'A line' CL Lean clay''`'"
50°h or mare Liquid limit less
passes [he than 50 PI < 4 or plots below 'A ' line' ML Silt""
No. 200 sieve
organic liquid limit -oven dried Organic clay°~~~"
< 0.75 OL
Liquid limit -not dried Organic silts~M'O
Silts and Clays inorganic PI plots on or above 'A" line CH Fat clay"-"
Liquid limit 50
or more PI bts below 'A" line MH Elasuc Silt`"'
organic Liquid limit -oven dried Organic clay'""
< 0.75 OH
Liquid limit -not dried Organic sil[S"''0
Highly organic soils Primarily organic matter, dark in color, and organic odor PT Peat
ABased on the material passing the 3-in. slf soil contains 15 to 29% plus No. 200, add
(75-mm) sieve ,•C1=D /D ce - (D's>x
`0 10 'with sand' or 'with travel', whichever is
°II field sample contained cobbles or D„ x D„ predominant.
boulders, or both, add'with cobbles or `II soil contains > 30°,o plus No. 200
boulders, or bath' to group name. predominantly sand, alid "sandy" to group
EGravels with 5 to 12%fines require dual rlf soil contains > 15% sand, add 'with name.
symbols: sand' to group name. °If soil contains > 30'ffi plus No. 200,
GW-GM well-graded gravel with silt °If fines classify as CL-ML, use dual symbol predominantly gravel, ;rdd 'gravelly" to group
GW-GC well-graded gravel with clay GC-G M, or SC-SM. name.
GP-GM poorly graded gravel with silt "ll tines are organic, add 'with organic fines' "PI > 4 and plots on or above 'A' line.
GP-GC poorly graded gravel with clay to group name. °PI < 4 or plots below 'A' line.
'Sands with 5 to 12%fines require dual 1f sail contains > 15% gravel, add 'with "PI plots on or above '.4' line.
symbols: gravel' to group name. °PI plots below 'A' line.
SW-SM well-graded sand with silt 'If Anerberg limits plot in shaded area, soil is
SW-SC well-graded sand with clay a CL-ML, silty clay.
SP-SM poorly graded sand with silt
SP-SC poorly graded sand with clay
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