GEOTEK ENGINEERING & TESTING SERVICES, INC. · GEOTEK ENGINEERING & TESTING SERVICES, INC. ... report showing the relative location of the test borings. ... SPT SPT SPT SPT SPT SPT

GEOTEK ENGINEERING & TESTING SERVICES, INC. 909 East 50th Street North Sioux Falls, South Dakota 57104 605-335-5512 Fax 605-335-0773

November 12, 2012 South Dakota State University Facilities and Services Administration 304, PO Box 2201 Brookings, South Dakota 57007 Attn: Les Olive Subj: Preliminary Geotechnical Exploration Proposed Residential Apartment Complex Medary Avenue & 11th Street Brookings, South Dakota GeoTek #12-B82

Introduction

This correspondence presents our reporting of the preliminary geotechnical exploration program for the referenced project. Our work was performed in accordance with our contractual agreement.

Site Conditions & Description

The project site is located northwest of the intersection of Medary Avenue and 11th Street on the campus of South Dakota State University in Brookings, South Dakota. The current site features include lawn/landscaping, sidewalks, gravel surfacing and asphalt pavement. Several existing buildings are also located at the site. Ground surface elevations at the test boring locations were determined by using the top of the fire hydrant located approximately 175 feet northwest of the northwest corner of the existing Agricultural Heritage Museum. An arbitrary elevation of 100.0 feet was used for the benchmark. Based on the benchmark datum, the surface elevations at the test boring locations varied from 94.1 feet at test boring 7 to 102.4 feet at test boring 1. A site sketch is attached at the conclusion of this report showing the relative location of the test borings. Field Data

Eight (8) test borings were performed at the project site on November 1, 2012. The logs of the test holes are attached. The subsurface conditions encountered at the test boring locations consisted of 2

1

2

3

4

5

6

7

8

16 117 15 890037

HSA

SPT

SPT

SPT

SPT

SPT

SPT

SPT

9

13

13

14

15

17

17

4½

19½

21

FILL

GLACIALTILL

GLACIALTILL

FILL, MOSTLY CLAY: with gravel, darkbrown, moist, 4'' of asphalt and 4'' of gravel atthe surface

LEAN CLAY WITH SAND: a little gravel,mottled brown and gray, moist, stiff to verystiff, (CL)

LEAN CLAY WITH SAND: a little gravel,brown, moist, very stiff, (CL)

Bottom of borehole at 21 feet.

19.5------

LABORATORY TESTS

DATE TIME SAMPLEDDEPTH

GEOTECHNICAL TEST BORING LOG

21------

CASINGDEPTH

CAVE-INDEPTH

--------

WATERLEVEL

BORING NO. 1 (1 of 1)

11-1-12------

2:59 pm------

none------

PROJECT Preliminary Geotechnical Exploration, Proposed Residential Apartment Complex, Medary Avenue & 11th Street, Brookings, SD

NO. WC D PL QULLTYPEN

GE

OT

EC

HN

ICA

L T

ES

T B

OR

ING

12-

B82

.GP

J G

EO

TE

KE

NG

.GD

T 1

1/12

/12

GEOTEK # 12-B82

WATER LEVEL MEASUREMENTS

METHOD3.25" ID Hollow Stem Auger

SURFACE ELEVATION 102.4 ft

DEPTHin

FEET

COMPLETE 11-1-12 2:58 pmSTART 11-1-12

909 E. 50th Street NorthSioux Falls, SD 57104605-335-5512 Fax 605-335-0773www.geotekeng.com

GEOLOGICORIGIN

CREW CHIEF Mike Wagner

SAMPLE

GEOTEK ENGINEERING& TESTING SERVICES, INC.

DESCRIPTION OF MATERIALWL

1

2

3

4

5

6

7

8

15

HSA

SPT

SPT

SPT

SPT

SPT

SPT

SPT

8

12

12

15

16

17

16

4½

21

FILL

GLACIALTILL




19.5------

LABORATORY TESTS



21------

CASINGDEPTH

CAVE-INDEPTH

19------

WATERLEVEL


11-1-12------

1:58 pm------

none------



GE

OT

EC

HN

ICA

L T

ES

T B

OR

ING

12-

B82

.GP

J G

EO

TE

KE

NG

.GD

T 1

1/12

/12

GEOTEK # 12-B82




DEPTHin

FEET



GEOLOGICORIGIN


SAMPLE



1

2

3

4

5

6

7

8

14

17

HSA

SPT

SPT

SPT

SPT

SPT

SPT

SPT

11

14

17

17

18

19

18

2

4½

21

FILL

GLACIALTILL

GLACIALTILL


SANDY LEAN CLAY: a little gravel, mottledbrown and gray, dry, stiff, (CL)



19.5------

LABORATORY TESTS



21------

CASINGDEPTH

CAVE-INDEPTH

17------

WATERLEVEL


11-1-12------

6:49 pm------

10------



GE

OT

EC

HN

ICA

L T

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ING

12-

B82

.GP

J G

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1/12

/12

GEOTEK # 12-B82




DEPTHin

FEET

COMPLETE 11-1-12 9:40 amSTART 11-1-12


GEOLOGICORIGIN


SAMPLE



1

2

3

4

5

6

7

8

8

15

HSA

SPT

SPT

SPT

SPT

SPT

SPT

SPT

24

32

25

21

19

18

18

2

7

21

FILL

GLACIALTILL

GLACIALTILL

LEAN CLAY: black, dry

LEAN CLAY WITH SAND: a little gravel,mottled brown and gray, dry, very stiff tohard, (CL)

LEAN CLAY WITH SAND: a little gravel,mottled brown and gray, moist, very stiff, (CL)


19.5------

LABORATORY TESTS



21------

CASINGDEPTH

CAVE-INDEPTH

--------

WATERLEVEL


11-1-12------

6:58 pm------

none------



GE

OT

EC

HN

ICA

L T

ES

T B

OR

ING

12-

B82

.GP

J G

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TE

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NG

.GD

T 1

1/12

/12

GEOTEK # 12-B82




DEPTHin

FEET



GEOLOGICORIGIN


SAMPLE



1

2

3

4

5

6

7

8

9

9

HSA

SPT

SPT

SPT

SPT

SPT

SPT

SPT

23

17

21

16

16

17

21

2

7

12

21

FILL

FILL

GLACIALTILL

GLACIALTILL

FILL, MOSTLY SAND: with gravel, mediumgrained, brown, moist

FILL, MOSTLY CLAY: with gravel, darkbrown, moist


LEAN CLAY WITH SAND: a little gravel,brown, moist, very stiff, (CL)


19.5------

LABORATORY TESTS



21------

CASINGDEPTH

CAVE-INDEPTH

19------

WATERLEVEL


11-1-12------

11:41 am------

none------



GE

OT

EC

HN

ICA

L T

ES

T B

OR

ING

12-

B82

.GP

J G

EO

TE

KE

NG

.GD

T 1

1/12

/12

GEOTEK # 12-B82




DEPTHin

FEET



GEOLOGICORIGIN


SAMPLE



1

2

3

4

5

6

7

8

16 116 5100

HSA

HSA

SPT

SPT

SPT

SPT

SPT

SPT

9

9

14

15

15

20

2

3½

9½

14½

21

FILL

FILL

GLACIALTILL

GLACIALTILL

GLACIALTILL

FILL, MOSTLY SAND: a little clay, mediumgrained, dark brown, moist

FILL, CONCRETE RUBBLE

LEAN CLAY WITH SAND: a little gravel,mottled brown and gray, moist, stiff, (CL)

LEAN CLAY WITH SAND: a little gravel,brown, moist, stiff, (CL)



19.5------

LABORATORY TESTS



21------

CASINGDEPTH

CAVE-INDEPTH

16------

WATERLEVEL


11-1-12------

5:56 pm------

7------



GE

OT

EC

HN

ICA

L T

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T B

OR

ING

12-

B82

.GP

J G

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TE

KE

NG

.GD

T 1

1/12

/12

GEOTEK # 12-B82




DEPTHin

FEET



GEOLOGICORIGIN


SAMPLE



1

2

3

4

5

6

7

8

15

20

18

HSA

SPT

SPT

SPT

SPT

SPT

SPT

SPT

9

2

3

13

13

15

13

9½

19½

21

FILL

GLACIALTILL

GLACIALTILL


LEAN CLAY WITH SAND: a little gravel,mottled brown and gray, moist, stiff, (CL)

LEAN CLAY WITH SAND: a little gravel,brownish gray, moist, stiff, (CL)


19.5------

LABORATORY TESTS



21------

CASINGDEPTH

CAVE-INDEPTH

--------

WATERLEVEL


11-1-12------

6:50 pm------

11------



GE

OT

EC

HN

ICA

L T

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T B

OR

ING

12-

B82

.GP

J G

EO

TE

KE

NG

.GD

T 1

1/12

/12

GEOTEK # 12-B82




DEPTHin

FEET



GEOLOGICORIGIN


SAMPLE



1

2

3

4

5

6

7

8

11

16

HSA

HSA

SPT

SPT

SPT

SPT

SPT

SPT

14

18

17

16

15

13

6

14½

21

FILL

GLACIALTILL

GLACIALTILL

FILL, MIXTURE OF SAND ANDCONCRETE RUBBLE: with sand


LEAN CLAY WITH SAND: a little gravel,brownish gray, moist, stiff, (CL)


19.5------

LABORATORY TESTS



21------

CASINGDEPTH

CAVE-INDEPTH

19------

WATERLEVEL


11-1-12------

7:09 pm------

none------



GE

OT

EC

HN

ICA

L T

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T B

OR

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12-

B82

.GP

J G

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KE

NG

.GD

T 1

1/12

/12

GEOTEK # 12-B82




DEPTHin

FEET



GEOLOGICORIGIN


SAMPLE



SILTY GRAVELS, GRAVEL - SAND -SILT MIXTURES

ORGANIC CLAYS OF MEDIUM TO HIGHPLASTICITY, ORGANIC SILTS

PEAT, HUMUS, SWAMP SOILS WITHHIGH ORGANIC CONTENTS

LETTERGRAPHSYMBOLSMAJOR DIVISIONS

COARSEGRAINED

SOILS

TYPICALDESCRIPTIONS

GRAVELAND

GRAVELLYSOILS POORLY-GRADED GRAVELS, GRAVEL

- SAND MIXTURES, LITTLE OR NOFINES

FINEGRAINED

SOILS

CLEANGRAVELS

GRAVELS WITHFINES

CLEAN SANDS

(LITTLE OR NO FINES)

SANDS WITHFINES

LIQUID LIMITLESS THAN 50

LIQUID LIMITGREATER THAN 50

HIGHLY ORGANIC SOILS

WELL-GRADED GRAVELS, GRAVEL -SAND MIXTURES, LITTLE OR NO FINES

SILTSAND

CLAYS

CLAYEY GRAVELS, GRAVEL - SAND -CLAY MIXTURES

WELL-GRADED SANDS, GRAVELLYSANDS, LITTLE OR NO FINES

POORLY-GRADED SANDS, GRAVELLYSAND, LITTLE OR NO FINES

SILTY SANDS, SAND - SILT MIXTURES

CLAYEY SANDS, SAND - CLAYMIXTURES

INORGANIC SILTS AND VERY FINESANDS, ROCK FLOUR, SILTY ORCLAYEY FINE SANDS OR CLAYEYSILTS WITH SLIGHT PLASTICITY

INORGANIC CLAYS OF LOW TOMEDIUM PLASTICITY, GRAVELLYCLAYS, SANDY CLAYS, SILTY CLAYS,LEAN CLAYS

ORGANIC SILTS AND ORGANIC SILTYCLAYS OF LOW PLASTICITY

SILTSAND

CLAYS

INORGANIC CLAYS OF HIGHPLASTICITY

SANDAND

SANDYSOILS

MORE THAN 50%OF MATERIAL IS

LARGER THAN NO.200 SIEVE SIZE

MORE THAN 50%OF MATERIAL ISSMALLER THANNO. 200 SIEVE

SIZE

MORE THAN 50%OF COARSEFRACTION

PASSING ON NO. 4SIEVE

MORE THAN 50%OF COARSEFRACTION

RETAINED ON NO.4 SIEVE

SOIL CLASSIFICATION CHART

(APPRECIABLE AMOUNTOF FINES)

(APPRECIABLE AMOUNTOF FINES)

(LITTLE OR NO FINES)

INORGANIC SILTS, MICACEOUS ORDIATOMACEOUS FINE SAND OR SILTYSOILS

NOTE: DUAL SYMBOLS ARE USED TO INDICATE BORDERLINE SOIL CLASSIFICATIONS

GW

GP

GM

GC

SW

SP

SM

SC

ML

CL

OL

MH

CH

OH

PT

BORING LOG SYMBOLS AND DESCRIPTIVE TERMINOLOGY

GeoTek Engineering & Testing Services, Inc.

SYMBOLS FOR DRILLING AND SAMPLING

Symbol Definition Bag Bag sample CS Continuous split-spoon sampling DM Drilling mud FA Flight auger; number indicates outside diameter in inches HA Hand auger; number indicates outside diameter in inches HSA Hollow stem auger; number indicates inside diameter in inches LS Liner sample; number indicates outside diameter of liner sample N Standard penetration resistance (N-value) in blows per foot NMR No water level measurement recorded, primarily due to presence of drilling fluid

NSR No sample retrieved; classification is based on action of drilling equipment and/or material noted in drilling fluid or on sampling bit

SH Shelby tube sample; 3-inch outside diameter SPT Standard penetration test (N-value) using standard split-spoon sampler SS Split-spoon sample; 2-inch outside diameter unless otherwise noted WL Water level directly measured in boring ▼ Water level symbol

SYMBOLS FOR LABORATORY TESTS

Symbol Definition WC Water content, percent of dry weight; ASTM:D2216 D Dry density, pounds per cubic foot LL Liquid limit; ASTM:D4318 PL Plastic limit; ASTM:D4318 QU Unconfined compressive strength, pounds per square foot; ASTM:D2166

DENSITY/CONSISTENCY TERMINOLOGY

Density Consistency Term N-Value Term Very Loose 0-4 Soft Loose 5-8 Firm Medium Dense 9-15 Stiff Dense 16-30 Very Stiff Very Dense Over 30 Hard

DESCRIPTIVE TERMINOLOGY

Term Definition Dry Absence of moisture, powdery Frozen Frozen soil Moist Damp, below saturation Waterbearing Pervious soil below water Wet Saturated, above liquid limit Lamination Up to ½” thick stratum Layer ½” to 6” thick stratum Lens ½” to 6” discontinuous stratum

PARTICLE SIZES

Term Particle Size Boulder Over 12” Cobble 3” – 12” Gravel #4 – 3” Coarse Sand #10 – #4 Medium Sand #40 – #10 Fine Sand #200 – #40 Silt and Clay passes #200 sieve

GRAVEL PERCENTAGES

Term Range A trace of gravel 2-4% A little gravel 5-15% With gravel 16-50%

Documents

GEOTEK ENGINEERING & TESTING SERVICES, INC. · GEOTEK ENGINEERING & TESTING SERVICES, INC. ... report showing the relative location of the test borings. ... SPT SPT SPT SPT SPT SPT