O PREVIOUS AND CURRENT SITE TOPOGRAPHY WEST …...Drilling becoming more difficult, soil is tighter...

310320

435430

425335

415425

SOURCES: CAD Design (RBF),Historical Topo Map (City of San Diego, 1951). PREVIOUS AND CURRENT SITE TOPOGRAPHY

WEST CAMPUS HOUSINGSAN DIEGO STATE UNIVERSITY

CREATED BY: CRS

PM: CRS PROJ. NO: 27661317.10000

FIG. NO:

4SCALE: 1" = 800' (1:960)

40 0 40 80 Feet

OSCALE CORRECT WHEN PRINTED AT 11X17

DATE: 12/17/2013

1951 Topography

APPENDIXA Subsurface Exploration

J:\27661317 CSU - TO1_West Campus Housing_SDSU\017_PROJECT_DELIVERABLES\2013-12-17 SDSD W Campus Housing Factual GeoRpt (URS).doc

Silty, clayey SAND(SC-SM)

TYPICAL MATERIAL GRAPHIC SYMBOLS

Sandy CLAY (CL) toclayey SAND (SC)

Depth in feet below the ground surface.

Sample Number:

Elevation:

Type of soil sample collected at depth intervalshown; sampler symbols are explained below.

Water content of soil sample measured inlaboratory, expressed as percentage of dry weight of specimen.

Blows per foot:

Depth:

Sample Type:

Dry unit weight of soil sample measured inlaboratory, in pounds per cubic foot.

1. Soil classifications are based on the Unified Soil Classification System. Descriptions and stratum lines areinterpretive; actual lithologic changes may be gradual. Field descriptions may have been modified to reflect results oflab tests.

2. Descriptions on these logs apply only at the specific boring locations and at the time the borings were advanced.They are not warranted to be representative of subsurface conditions at other locations or times.

Number of blows required to advance drivensampler 12 inches beyond first 6-inch interval, or distance noted,using a 140-lb hammer with a 30-inch drop.

Graphic Log:

GENERAL NOTES

COLUMN DESCRIPTIONS

Description of material encountered;may include relative density/consistency, moisture, color,particle size; texture, weathering, and strength of formationmaterial.

Graphic depiction of subsurface materialencountered; typical symbols are explained below.

Elevation in feet referenced to mean sea level(MSL) or site datum.

Material Description:

Sample identification number.Unnumbered sample indicates no sample recovery.

Comments and observationsregarding drilling or sampling made by driller or field personnel.

Water Content:

Dry Unit Weight:

Remarks and Other Tests:

WASALLPIEIR-valueCOMPCORR

Three-point Wash Analysis, %<#200 sieveSieve Analysis, %<#200 sieveLiquid limit (from Atterberg limits test), %Plasticity Index (LL-PL), %; NP=nonplasticExpansion Index, % volumeResistance-Value testLaboratory Compaction testCorrosion Suite

Grab sample

TYPICAL SAMPLER GRAPHIC SYMBOLS

California sampler(2.5"ID)

Standard Penetrationsampler

Bulk sampleFirst water encountered at time of drilling andsampling (ATD)

Water level measured at specified time aftercompletion of drilling and sampling

Inferred or gradational contact between strata

Minor change in material properties within a stratum

OTHER GRAPHIC SYMBOLS

Project Location: San Diego State University

Project Number: 27661317.10000

Key to LogsSheet 1 of 1

Project: West Campus Housing

SAMPLEST

MATERIAL DESCRIPTION

nt, % REMARKS AND

OTHER TESTS

SA(54), LL(47),PI(53), EI(72),R-value, COMP,CORRDifficult drilling

SA(14)

SA(21)

SA(19)

FILL4" asphalt over 3" base over moist, brown, clayey sand to sandy clay with gravels

Increase in cobbles

MISSION VALLEY FORMATIONMedium dense, moist, light reddish brown, silty to clayey fine to coarse grainedSAND (SM-SC) with few cobbles and gravels

4" thick layer of brown, sandy clay

Becomes very dense

Becomes dense, light yellowish brown

Increase in cobbles

Bottom of boring at 26.5 feet

LoggedBy

Total Depthof Borehole

Water LevelDepth

Drill BitSize/Type

140 lbs/30-inch dropHammerData

10/09/13 M. HatchDate(s)Drilled

Location

SamplingMethod(s)

West Parking Lot (See SIte Plan Figure 2)

Drill RigType

None Encountered

DrillingContractor

Soil Cuttings

DrillingMethod

Marl M5

D. Rector

ApproximateSurface Elevation

CheckedBy

Hollow Stem Auger

436.5 feetPacific Drilling

BoreholeCompletion

26.5 feet

Bulk/Cal(2.5")/SPT

6.5-inch finger bit

nt, % REMARKS AND

OTHER TESTS

SAMPLES

Log of Boring B01Sheet 1 of 1

Project: West Campus HousingR

SA(39), LL(54),PI(421), EI(47),R-value, COMP

SA(47)

SA(18), LL(64), PI(46)

Switched to 24" corebarrel

FILL3" asphalt over 6" base over moist, brown, clayey sand to sandy clay with roundedcobbles

Moist, yellowish brown, clayey sand with many rounded cobbles (large) mixed withbrown, sandy clay

Bottom of boring at 12.5 feet

LoggedBy

Water LevelDepth

Drill BitSize/Type

NAHammerData

Location

SamplingMethod(s)

East Parking Lot (See SIte Plan Figure 2)

Drill RigType

None Encountered

DrillingContractor

Soil Cuttings

DrillingMethod

Tescar DR-35 (rubber-track mounted)

D. Rector

CheckedBy

Solid Stem Auger

427 feetPacific Drilling

BoreholeCompletion

12.5 feet

Grab/Bulk

24-inch flight auger/24-inch corebarrel

nt, % REMARKS AND

OTHER TESTS

SAMPLES

Log of Boring B02Sheet 1 of 1

Drilling becomingmore difficult, soil istighter

FILLMoist, yellowish brown to dark yellowish brown, sandy fine to medium clay, somefine to coarse gravel, some cobbles some dark grayish brown soil

Becomes grayish brown to dark grayish brown

Becomes strong brown

MISSION VALLEY FORMATIONMoist, light yellowish brown, silty, clayey fine to medium SAND (SM-SC), trace fineto coarse gravel, localized weak cementationAt 8.5', increase in fine to coarse gravel, some cobbles up to 9", becomes darker incolorMoist, light yellowish brown to yellowish brown, fine to coarse sandy CLAY (CL) toclayey, fine to coarse SAND (SC), some fine to coarse gravels, some cobblesAt 10.5', grinding on large cobble or small boulderBottom of boring at 11 feet

LoggedBy

Water LevelDepth

Drill BitSize/Type

NAHammerData

Location

SamplingMethod(s)

Drill RigType

None Encountered

DrillingContractor

Soil Cuttings

DrillingMethod

A. Avakian

CheckedBy

Solid Stem Auger

BoreholeCompletion

11.0 feet

24-inch flight auger

nt, % REMARKS AND

OTHER TESTS

SAMPLES

Log of Boring B02aSheet 1 of 1

Soil becomes denser

Auger grinding onlarge cobbles

FILLMoist, yellowish brown to dark yellowish brown mottled with dark grayish brown,fine to medium sandy clay with some fine to coarse gravel, some cobbles

Becomes strong brown with trace fine to coarse gravels

MISSION VALLEY FORMATIONMoist, light yellowish brown, fine to coarse sandy CLAY (CL) to clayey fine tocoarse SAND (SC), some fine to coarse gravels, some cobbles (20-25% gravelsand cobbles)At 9.75', large cobble/small boulders (16"x7"x5")At 10.25', cobble/boulders (12"x9")

Bottom of boring at 12 feet

LoggedBy

Water LevelDepth

Drill BitSize/Type

NAHammerData

Location

SamplingMethod(s)

Drill RigType

None Encountered

DrillingContractor

Soil Cuttings

DrillingMethod

A. Avakian

CheckedBy

Solid Stem Auger

BoreholeCompletion

12.0 feet

24-inch flight auger

nt, % REMARKS AND

OTHER TESTS

SAMPLES

Log of Boring B02bSheet 1 of 1

APPENDIXB Geotechnical Laboratory Testing

J:\27661317 CSU - TO1_West Campus Housing_SDSU\009_FIELD_LAB_DATA\Lab Data\Sieve CSU T01 B01 015 URS

UNIFIED SOIL CLASSIFICATION Sieve Dia. %

No. mm Finer

3" 75.0 100.0

2" 50.0 100.0

1.5" 37.5 100.0

1" 25.0 100.0

3/4" 19.00 100.0

1/2" 12.50 100.0

3/8" 9.50 100.0

#4 4.75 100.0

#10 2.00 99.9

#20 0.850 97.5

#40 0.425 74.9

#60 0.250 33.4

#100 0.150 18.9

#140 0.106 15.7

#200 0.075 14.0

% Cobbles ---0.086.014.0

Boring No. Sample No. Depth (ft) SYMBOL Wn (%) LL PI % 2 µm Description and Classification Cu

B-01 4 15.0 6.0 --- NP --- Cc

PROJECT NAME: SDSU West Campus Housing PROJECT NUMBER: 27661317

% Gravel % Sand

% Fines

PARTICLE-SIZE DISTRIBUTION CURVES

Yellowish red silty Sand (SM)

50 5 0.5 0.05 0.005

#200 3" 2" 1"

3/4" 3/8" #4

#10 #20

#40 #60 #100

0.0010.010.1110100

GRAIN SIZE IN MILLIMETERS

U. S. STANDARD SIEVE SIZES

COBBLES

GRAVEL SAND SILT AND CLAY COARSE FINE COARSE FINE MEDIUM

HYDROMETER

SR-400 (05/00) (SNA) Compaction CSU T01 B02 bulk URS

COMPACTION CURVE

Test Method: ASTM D 1557 ASTM D 698 CA-DWR: S-10 Other Effort Compaction Procedure: B Specimen Preparation Method: Moist

PARTICLE-SIZE DISTRIBUTION CURVEGRAVEL SAND

COBBLES COARSE FINE COARSE MEDIUM FINE SILT OR CLAY

NOTATION: Representative of entire sample Representative of compacted specimen Representative of compacted specimenand entire sample

Description and/or Classification

PROJECT NAME: SDSU West Campus HousingPROJECT NUMBER:

SUBMITTED BY:

Brown clayey Sand with gravel (SC)

COMPACTION AND INDEXPROPERTY DATA

BoringNumber

27661317

130.09.5

OptimumWC (%)

SampleNumber

Depth(ft.)

MaximumDUW (pcf)

5 6 7 8 9 10 11 12 13 14 15 16 17 18

Molding Water Content (%)

0.0010.010.1110100PER

#4 #200 3" U.S. Standard Sieve Size

Saturation = 100% for Gs=

Measured Assumed

SR-400 (05/00) (SNA) Compaction CSU T01 B01 bulk URS

COMPACTION CURVE

Test Method: ASTM D 1557 ASTM D 698 CA-DWR: S-10 Other Effort Compaction Procedure: B Specimen Preparation Method: Moist

PARTICLE-SIZE DISTRIBUTION CURVEGRAVEL SAND

COBBLES COARSE FINE COARSE MEDIUM FINE SILT OR CLAY

NOTATION: Representative of entire sample Representative of compacted specimen Representative of compacted specimenand entire sample

Description and/or Classification

PROJECT NAME: SDSU West Campus HousingPROJECT NUMBER:

SUBMITTED BY:

Dark brown sandy Clay (CL)

COMPACTION AND INDEXPROPERTY DATA

BoringNumber

27661317

126.09.5

OptimumWC (%)

SampleNumber

Depth(ft.)

MaximumDUW (pcf)

5 6 7 8 9 10 11 12 13 14 15 16 17 18

Molding Water Content (%)

0.0010.010.1110100PER

#4 #200 3" U.S. Standard Sieve Size

Saturation = 100% for Gs=

Measured Assumed

APPENDIXC Previous Geotechnical Studies

O PREVIOUS AND CURRENT SITE TOPOGRAPHY WEST …...Drilling becoming more difficult, soil is tighter...

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