TETRA TECH - Pigeon Lakepigeonlake.org/PastPlans/Tetra Tech Report of Exploration.pdf · TETRA TECH...

TETRA TECH

August 17, 2007

Pigeon Lake Protection and Rehabilitation District Attn: Mr. Dennis Krueger Clintonville, Wisconsin 54929

SUBJECT: Report of Exploration Pigeon Lake Drawdown Potential Clintonville, Wisconsin Tetra Tech Project No. 7340178

Dear Mr. Krueger:

Per your request, we have collected sediment samples for classification and laboratory testing to determine the potential effect of a drawdown of Pigeon Lake.

This report summarizes our exploration and findings, and presents our recommendations for the potential results of a drawdown. The soil samples obtained in the field will be retained at our office for two months. The samples will then be discarded unless we are requested to hold them for a longer period.

We appreciate the opportunity to be of service to you on this project. If you have any questions concerning this report, or if we can be of further assistance as this project develops, please contact us at (715) 845-4100.

Sincerely, TETRA TECH

Andy Walters, E.1.T Geotechnical Engineer Drilling Department Manager

AW SAGEOTECH\2007jobsWigeon Lakelreport 081707.000

Attachments

Tet.ra Tech, icc, 565 South 72"' Avenue, Wausau, WI 54401

715.845.4100 i'".3x 715.842.0381 www.tetratethcorn

Report of Exploration

Pigeon Lake Drawdown Potential Clintonville, Wisconsin

Prepared for:

Pigeon Lake Protection and Rehabilitation District

Waupaca County Clintonville, Wisconsin 54929

Prepared by:

Tetra Tech

555 South 72'd Avenue Wausau, Wisconsin 54401 (715) 845-4100 Fax (715) 842-0381 Tetra Tech Project No. 7340178

August 17, 2007

121.1;e0i; 10!

TABLE OF CONTENTS

1.0 INTRODUCTION 1

1.1 Project Information 1

2.0 EXPLORATION PROGRAM RESULTS 2

2.1 Exploration Scope 2 2.2 Sediment Conditions 2 2.3 Water Level Depths and Sediment Thickness 2 2.4 Labortory Test Program 2

3.0 DISCUSSION AND RECOMMENDATIONS 2

3.1 Additional Considerations 2

4.0 STANDARD OF CARE 3

LIST OF TABLES

Table 1: Pigeon Lake Water Depths and Sediment Thickness 2

LIST OF APPENDICES

Appendix A: Sample Location Plan Appendix B: Sample Logs and Laboratory Test Results Appendix C: General Information

Tetra Tech

August 17, 2007

'11'di,1 11.7 2 “,

etk Rairthifazlric:n

1.0 INTRODUCTION

This report has been prepared to aid in the evaluation of alternatives to increase lake depth for Pigeon Lake in Waupaca County near Clintonville, Wisconsin. This report includes exploration data, laboratory and engineering analysis, and recommendations for the potential drawdown results for the proposed project.

The primary purpose of the exploration was to determine the stratigraphy and physical properties of the sediment soils lining the lake bottom, particularly the potential settlement a lake drawdown would cause.

The analysis and recommendations presented in this report is under the assumption that variations in the sediment soils exist, but is based solely upon the samples collected.

This report is not intended to document or detect the presence, or absence, of any environmental conditions at the site, nor to perform an environmental assessment of the site.

1.1 Project Information

We understand the Pigeon Lake Protection and Rehabilitation District is evaluating alternatives to increase lake depth. Tetra Tech has been tasked to provide recommendations for the potential results of a lake drawdown. Mr. Dennis Krueger authorized Tetra Tech to perform the exploration at this site.

2.0 EXPLORATION PROGRAM RESULTS

2.1 Exploration Scope

On June 21, 2007, 4 locations of Pigeon Lake were sampled by collecting bulk samples and PVC Tube samples for sediment classification and laboratory testing. The PVC Tube samples were collected by directly pushing the tubing in the sediment layer and capping the tube ends for sample preservation. A sample location diagram is included in Appendix A.

The samples recovered were returned to our laboratory for testing, and reviewed by a geotechnical engineer. The soil classifications are in accordance with the Unified Soil Classification System (USCS).

2.2 Sediment Conditions

The laboratory tests indicate the sediment sampled contained between 6.4 to 42.9 percent organic material. Of the four sample locations, only sample location PL•3 encountered fine grained cohesive soils (clay). Sample locations, PL-1, PL-2, and PL-4 each encountered granular, cohesionless soils (silt and sand).

Detailed descriptions of the soils encountered are provided on the boring logs included in Appendix 8.

Tetra Tech August 17, 2007

SAMPLE LOCATION

SEDIMENT THICKNESS

WATER DEPTH

3.5 FT

5.0 FT

3.0 FT

5.0 FT

PL-1

PL-2

PL-3

26 INCHES

23 INCHES

23 INCHES

PL-4 30 INCHES

arct i rde}:11 Pown tok e Prmeetioo bili Distreop. .... .

2.3 Water Level Depths and Sediment Thickness

Pigeon Lake water level depths and sediment thicknesses are provided in the following Table 1 for the location sampled.

Table 1 — Pigeon Lake Water Depths and Sediment Thickness

2.4 Laboratory Test Program

The laboratory-testing program included moisture content analysis, mechanical analysis, atterburg limits analysis, and unit weight determination in accordance with the Unified Soil Classification System (USCS) and ASTM Standards.

3.0 DISCUSSION AND RECOMMENDATIONS

The following paragraphs present our recommendations relative to the potential results a drawdown of Pigeon Lake would have.

The predominately granular, cohesionless soil encountered will be minimally effected by a drawdown of Pigeon Lake. On average, we predict between 5 to 10 percent settlement of the sediment encountered. This percentage equates to only 2 to 5 inches of total settlement in the sediment layer if the entire column of sediment is exposed during the drawdown period. The silty sand and poorly graded sand soils are not considered compressible, and the drawdown will only increase the effective stress in the soil between 10 to 25 pounds per square foot.

Due to the pervious nature of the granular soils encountered, the time frame for the drawdown can be completed within a relatively short period of time, on the order of few weeks or a month. Only the material exposed, and allowed to dry will be affected by a drawdown, therefore the water column must be lowered to the lowest possible elevation to have any significance.

3A Additional Considerations

e Wildlife habitat should be considered during the time of the proposed drawdown. Drastically decreasing the water column in Pigeon Lake can directly influence plant and

11111011111111bitat and may have long-lasting detrimental effects.

Tetra Tech

August 17, 2007 2

■ • 4,1•1) 1 1?,0hrisu.ri , 1 17-1 ,Ae6Tivion i); ,-/r.et

4.0 STANDARD OF CARE

The recommendations contained in this report represent our professional opinions. These

opinions were developed in accordance with currently accepted engineering practices at this

time and location. Other than this no warranty is implied or intended.

This report was prepared by:

Andy Walters, E.I.T. Geotechnical Engineer

SAGEOTECH12007jobsiPigeon LakeVeport (181707.DOC

.....

Tetra Tech August 17, 2007 3

X 0,44 9we, A

APPENDIX A

SAMPLE LOCATION DIAGRAM

APPENDIX B

SAMPLE LOGS LAB TEST RESULTS

Project Name: Pigeon Lake

Borehole Location: See Sample Location Plan _ ____ _

Borehole Number; PL-1 Driller: Neal Thieme Logger: Clint Eiden

Drilling Equipment: Direct Push PVC Borehole 2 Date Started: 6/21/07 Date Finished: 6/21/07 Diameter (in.): Elevation Ground: and Datum: Notes:

DEPT

H (ft

)

P OCK

E T PE

NTAM

E TER

(Op)

1

kIVIP

LE N

U MBE

R z

SAM

PLE

STAN

DAR D

PE

NETR

ATIO

N ! T

EST

(blow

s/ft) W ifi 0

-4 >-

MOI

STU R

E CO

NTE N

T (%

)

4.-:-

Fj.

-0 I P

LAST

ICIT

Y IN

DE

X

GRAP

HIC

LOG

o z

w :..) MATERIAL DESCRIPTION

CI 0

a O.

CY - O.

0 SPT 0 LL N in

47t. X

V cl

3.5

2-

_

•

3.5' of Water

96.8 ....I•: 26" of Lake Sediment

ye::1 :. POORLY GRADED SAND with 6.5% to 9.6% organics (SP), fine to — - medium grained, grey/black, wet

88.4 46.2 NV NP 2 V . _

-5.7 END OF BORING

samPler ar4 SPIlt 0 Penetrometer I / Auger TypeS: w spoon Types: Operation WATER LEVEL OBSERVATIONS

ill Shelby iti Vane Shear g i Air Rotary While Drilling V_ p ft Upon Completion of Drilling t ft

Time After Drilling ril Bulk California 11 Barrel Depth To Water (ft) _______ ____ 'KT.. Sample

tiH Push

IN Grab Test Pit NA Excavated Remarks:

7340178 it TETRA TEC1A, INC. LOG OF EXPLORATORY BORING PL-1 Fig. 1

601-0.1 (AT)

U.S. SIEVE OPENING IN INCHES

4 2 1 1/2 6 3 1.5 314 1/2 :

U.S. SIEVE NUMBERS

6 10 14 1° 20 30 40 50 60 100 140 200

I I r HYDROMETER

100

00

70

80

m

Zw 50 LL

40

a.

30

20

10

100

10

01

0.01

0.001

GRAIN SIZE IN MILLIMETERS

COBBLES GRAVEL SAND

SILT OR CLAY coarse j fine coarse [medium 1 fine

Specimen Identification Classification

LL

PL PI

Cc

Cu

PL-1 - (4.5 - 5.7 ft)

POORLY GRADED SAND(SP)

NV NV NP 0.84 2.36

an

Specimen Identification

D100

PL-1 - (4.5 - 5.7 ft) 9.5 D60 D30 D10

0.397 0.237 0.168

%Gravel %Sand %Si t %Clay

0 98 2

GRAIN SIZE DISTRIBUTION Project: Pigeon Lake

Location: See Sample Location Plan

Number 7340178

ro

rb

I. 0 an

O

TETRA TECH

Figure No. 2

firviend r,-10.36 (MAT)


Borehole Location: See Sample Location Plan

Borehole Number: PL-2 Driller Neal Thiome Logger. Clint Eiden _

Drilling Equipment: Direct Push PVC Borehole - 2 plarne etraii Date Sta rted : 6/21/07 rt d Date Finished: 6/21/07

Elevation Ground: and Datum: Notes:

DE

PTH

(ft)

DR

ILL O

PE

RA

TIO

N

SA

MP

LE

PO

CK

ET

PE

NTA

ME

TER

(Q

p)

SA

MP

LE N

UM

BE

R

ST

AN

DA

RD

P

EN

ET

RA

TIO

N

TE

ST

(b

low

s / t)

MO

IST

UR

E C

ON

TEN

T ( %

)

DR

Y D

EN

SIT

Y (

pc f)

LIQ

UID

LIM

IT

x ii, a 2 > t- o

e a 0

GR

AP

HIC

LO

G

MATERIAL DESCRIPTION

DE

PTH

(ft)

SPT LL PI

..

-.]

."-, ,"

9/ ..A.°

471.6

239.4 21.7

NV

NV

NP

NP

5' of Water

•

H

,.

_

4 -

ft -

37 •

• .

23" of Lake Sediment

SILTY SAND with 30% to 42.9% organics (SM), fine grained, black/grey, wet

:7

END OF BORING

Sampler Types:

K-7 Spoon IA si"xxx,

II Shelby

rq Moe

Push IN Grab Sample Sample

'. ;se

[a

H —

Penetrometer

Vane Shear

California

rest Pit

erat. 1°" Types. 11

El

r_l

FA

Auger

Air Rotary

trerel Excavated Pit

WATER LEVEL OBSERVATIONS

While Drilling SZ, 0 ft Upon Completion of Drilling I __ft

_ ______ Time After Drilling .

Depth To Water (ft) It

-- - Remarks:

7340178 LOG OF EXPLORATORY BORING PL-2 Fig. 3 h it TETRA TECH, INC.

U005.10-02-011 (NAT)

U.S. SIEVE OPENING IN INCHES I U.S. SIEVE NUMBERS I HYDROMEIER 4 2 1 1/2. 3 6 16 30 50 100 200 ..... 6 3 5 :4/4 3/8 4 20 40 60 140

PE

RC

ENT

FIN

ER

BY

WE

IGH

T

8 -84

0 0

st.

o

0

-'"N---

•

100 10 1 01 0.01 0.001


LCOBBLES GRAVEL SAND

SILT OR CLAY coarse Dina coarse medium I fine

Specimen Identification Classification LL PL PI Cc Cu PL-2 - (5 - 6 ft) SILTY SAND(SM) NV NV NP 0.38 10.81

D100 D60 D30 D10 %Gravel %Sand %Silt %Clay Specimen Identification

PL-2 - (5 - 6 ft) 2 0.294 0.055 0.027 0 63 36 1

, -

TETRA TECH



Number: 7340178 Figure No. 4 rioAnwl 5-10-06 (MAI)

0

a

Lu

in

0

9

(I



Borehole Number: PL-3 Driller: Neal Thieme Logger: Clint Eiden

Drilling Equipment: Direct Push PVC Borehole 2 Diameter in.: Date Started: 6/21/07 Date Finished: 6/21/07

Elevation Ground: and Datum: Notes:

Zi.1

LH a D

RIL

L O

PE

RA

TIO

N

1 S

AM

PL

E

PO

CK

ET

PE

NTA

ME

TER

(00

1

IMP

LE

NU

MB

ER

ST

AN

DA

RD

P

EN

ET

RA

TIO

N

TES

T

(blo

wst

)

MO

ISTU

RE

CO

NTE

NT

(%)

DR

Y D

EN

SIT

Y (p

ar)

ea 5

• PLA

ST

ICIT

Y I

ND

EX

--I

e. -..

CI `1'

. „,,,

0


DE

PTH

(ft)

SPT LL PI

92.5

36.3 75.1 23 8 83

_

2 -

3' of Water

-3 - —

2_2"

_

— —

23” of Lake Sediment

ORGANIC (6.4% to 9.7%) CLAY with sand (OL), black/dark grey, wet

... -

-..

_

-

-5 END OF BORING

..... Sampler ix Spoon

Types: sii-o twl, Penetrometer

Vane Shear

Operation [1] Auger Types: WATER LEVEL OBSERVATIONS

111 Shelby V : § Air Rotary While Drilling Sl- ft Upon Completion of Drilling I ft _.0

Time After Drilling

Lusi fl inple

rre,

i Bulk California H - i Sample Grab

. Lple E fest Pit

ri M

Barrel Excavated

Pit

Depth To Water (ft) _____

Remarks:

Fig. 5 7340178 TETRA TECH, INC. LOG OF EXPLORATORY BORING PL-3

Rericad (MAT)

U.S. SIEVE OPENING IN INCHES

0 4 1 1/2

I U.S. SIEVE

3 1.5 314 3/8 3 6

4 810

1 16

NUMBERS I

— 40 0 1i

0 ( ° 140 2°()

I IYDROMETER

30 00

PER

CE

NT

FIN

ER

BY

WE

IGH

T

• 0

_ —

100 10 1 0 1


0.01 0.001

GRAVEL [COBBLES -1

SAND SILT OR CLAY

coarse fine coarse medium r fine

Specimen Identification Classification LL PL PI Cc Cu

PL-3 - (4 - 5 ft) ORGANIC CLAY with SAND(01) 23 15 8

Specimen Identification D100 D60 D30 D10 %Gravel %Sand %Si t I %Clay

PL-3 - (4 - 5 ft) 0.841 0.034 0.002

GRAIN

0 17 54 29

.._

SIZE DISTRIBUTION

TETRA TECH

-

Project: Pigeon Lake


Number: 7340178 Figure No. 6

14.0v1sed 6-10-00 (MAT)

0 co

a- u)

w

co 0 0 0

2 476- a. ro



Borehole Number: PL-4 Driller: Neal Thiome Logger: Clint Eiden

Drilling Equipment: Direct Push PVC Borehole Diameter (in.):

2

Notes:

Date Started: 6/21/07

...,..—.--

Date Finished: 6/21/07

,1;.'

ElevatIor Ground: and Datt IN:

4,:, - : I-- a. LIJ 0

Z 0 F"

1

d --1 tr. 0 S

AM

PL

P

• -

1 PO

CK

ET

PE

NT

AM

ET

ER

I`C

p)1

I SA

MP

LE N

UM

BER

F 1,

1 S

TAN

DA

RD

_

i S

(Now

sift)

MO

IST

UR

E C

ON

TE

NT

%)

DR

Y D

.E. N

SIT

Y (

pc?)

I-

D a 5

.J

LL

P IN

'EX

1 -20

1: (

%)

....i o T. CI-

(9 IN


8

..7f.'..-

..9-

...e..---4

.t,.-

-',..-4.- ..-e. .."-...e,

292.:

285.' 18.3

NV

NV

NP

NP

.343

5' of Water

-5

• . 30" of Lake Sediment

SILTY SAND with 23.8% to 25.4% organics (SM), fine to medium .. grained, black/grey, wet

..:

8.5 END OF BORING

Sampler Types:

Push Sample

;;A:

Split Spoon

Shelby

Bulk Sample Grab Sample

Penetrometer

Eal Vane Shear

H . . . Callfogisa

lest Pit

Operation Types:

to

Auger

I Air Rotaiy

WATER LEVEL OBSERVATIONS

While Drilling V- ____. 0 ft Upon Completion of Drilling

Time After Drilling

Depth To Water (ft) ______ _ Remarks:

_

I ft

........--........--..

111 Gore

pi Excavated

. Y.

• 340178 it TETI1A TECH, INC. LOG OF EXPLORATORY BORING PL-4 .... ........._

Fig. 6 .

RovrIPU 8-024K, (NA 11

U.S. SIEVE OPENING

4 2 6 3

IN INCHES I U.S. SIEVE NUMBERS I HYDROMETER

.5 1 1/23/8 6 10 16 30 50 100.140 200 3/4 3/8 4 8 14 40 60 1 20 40

PE

RC

EN

T F

INER

BY

WE

IGH

T

I,:44

. 4

.;

CT C

',4 C

O 8

0 8 C 0

o

0

0 C

c 8

0 1 I I I I I I l' I I I 1 r

i

100 10 1 01 0.01 0.001


GRAVEL SAND SILT OR CLAY COBBLES

coarse I tine coarse medium I., fine

Specimen Identification Classification LL PL PI Cc Cu PL-4 - (5 - 6.5 ft) SILTY SAND(SM) NV NV NP

Specimen Identification D100 D60 D30 010 %Gravel %Sand %Silt I %Clay PL-4 - (5 - 6.5 ft) 2 0.218 0 62 38

TETRA TECH



Number: 7340178 Figure No. 8 Review 5-10414 (MAT)

TE E

APPENDIX C

GENERAL INFORMATION

SC Clayey sand G"'

PT Peat Highly organic sollS Primarily organic matter, dark In valor, and organic odor

Cnarse.Cirairied Soils

Mae than 50%

retained On No. ar0

sieve

More than SOS COMe lractieri retained on

No. 4 sieve

Clean Gravels Less than 5. ,„

fines

Gravels with Finns

More than 12% fines

Ca S and 1 5 Cc c 5'

Cu < 4 3nd'or 1 > Cc >

Fines classify as ML or MI-I

Fines class:ly as CL or ClA

Sands

50% or more of

coarse faction passes No 4 S:Ova

Clean Sands Less than 5%

fines

Sands with Fines

Mn 123 Ore t an 'a fines

Ci: z 6 and 1 s Cc 5. 3'

Cu < 0 and;ur 1> Cc > 3E

Fines classify as ML or MN

Fines classify as CL or CH

Fine-Grained Sous 561tor more passes

the No. 200 sieve

Silts and Clays Liquid firm less

than 50

Silts and Clays Liquid lend 50 or

more

Inorganic

Pi a 7 and plots on or above -11'.

line

PI < 4 or plots below 'A" line

Organic

Inorganic

L:NgidIiinit_7 oven dried Liquid limit - not dried 4 "S .

PI plots on Of atmv0 "A' line

PI plots below W line

Organit: Liquid Said= oven dried

Liquid limit --not dried 676

Organic clat'''" MN •

Organic sill

OL Organic sill u°

ML Sat

CH Fat clay 4 "

• MH Elastic sift

UH Organic clay'''L " O

•••••••••••..•••••••••

SW Well-graded sand

SF' Poorly graded sand

SM Silly Sand

OW ',Ned graded gravel'

GP Poorly graded gravel'

GM Silty gravel

GC Clayey gravel 6 "

CL Leafs clay

. I rCn.„,...

)0

ref itill$ of , C.04 OA 01 ',I...21.11 1011{

7,73-f 7i47-1-c-iliiirriViITOZO f 5 00717--1741 ,4"a • -• 10.1 i H 50 —"- IL Eguraild. tof .4. - law

ika,r3.11 0 I. PI-4 to LL - 25 5. Lat, I ia-a P1-0 75 lt.L- 201

so 41.- i • of • 0 . - 0 ,1

"... '1:11 ', 14'..1.7. . 0,101 Lk . is , C PI"

f. Y" thy. P1•0 91L1. - Is / ,..

5., .-

s'a

,I7F-t75; " s 6

.4;.;

L Od l i: L.IMiS ILL 1

TETRA TECH, INC. CLASSIFICATION OF SOILS FOR ENGINEERING PURPOSES

M Desiirotiow 0 24i17

Viased (•; jrVIG:1 Sr;.1C:assif:catioo S ,;s:er

MAJOR DIVISIONS GROUP

SYMBOL GROUP NAME

Based on the material passing the 3-in. (75- mm) sieve.

It field sample contained cobbles cm bouiders, or both. add with cobbles or boomers, or both" to group name.

`Gravels with 5 to 12% require dual symbols:

GW•GAA weir•graded gravel with sill GW•GC wee-graded gravel with Clay

GP-GM poorly graded grave: with silt GP-GC poorly graded gravel with clay

° Sands with 5 to 12% fines require dual symbols:

SW-SM wen-graded sand with rah SW-SC well-graded sand with clay

SP-SM primly graded sand with sill

SP-SC poorly graded sand with clay

Sit YE AN al. , SIS

IL 41.• I ♦ , I MO

I a w, • 405.0 .0 VY)

) it,

IL 11 $

C •r :*

Cu .• Cc= 1 0.011 't D '1) '11 soil conlains a 15% sand. add "with sand - to

group name.

4 11 fines classify as CL-ML, use dual symbol GC-GM, or SC-Sht.

II fines are organic, add "with ()manic firms" to group name.

It sod contains 5 15% gravel, add 'with gravel' to group name. If soil contains P 15% gravel, add ',am gravel' to group name.

' If Atterbarg limits plot in lialchod area. soil is a GL-ML, silty clay,

". If soil contains 15 to 29% plus No. 200, add "with said" or 'vvith graver, whichever is predominant.

If solid Contains 1,, 30% plus No. 200. predominantly sand, add -sandy' to group name.

" If 50i1 contains IP. 30% plus No 200. predominantly gravel, add "gravelly' le group name.

" Pt 4 and plots OR Or above 'A" tine.

PI < 4 or lots below A. line.

PI plots On or above "A: fine.

° P1 plots below "k line

SYMBOLS . _ Drilling and Sampling Labor:J.1,3:v Test.im IF

141P liSA - hallow stem auger

l'A - nigh; auger

rffl - hand auger

,..7] _ 2 1:2",1", 5" or 6" steel drive casing

fillfi RH _RC - Size A, 11, or N rotary casing

P1) - pipe drill or cleanout tube

En - drilling mud

JW -jetting water

In SD -2" U.D. split barrel sample

[Di L - 2 112" or 3" U.D. SB liner sample

- 2" or 3" thin walled tube sample

[113l 3TP 3" thin walled tube using pitcher sampler

TO - 2" or 3" thin walled tube using Osterberg sampler

[2] w _wash sample

13 - bag sample

- test pit sample

n - 11Q, NQ, PQ wireless system

Lal"71 L\I _X - AX, 13X, NX double tube barrel

I

NSR - no sample recovered

CI CORE - rock core

V • WL water- level

N standard penetration test, blows per foot

CR - core recovery, percent

\Vigo Content, % (Asim" 13 72i 6) 1)

l3ry density, per

LL

Liquid lunar (ATS.vI [) •1316} Plastic I unit (ASTM 0 4315)

-• Inserts in Las: (Qt: or RQD)

Qtt Unconfined compressive strength, psf (AS CM 1) 2166) l'q Penetrometer reading, tsf (ASTM 1) 1558)

is Torvane reading, tsf

G Specific gravity (ASTM D 854) SI, Shrinkage limits (ASTM D 427) CC Organic content - Combustion method (ASTM D 2974) SP Swell Pressure, tsf (ASTM 0 4546) PS Percent swell under pressure (ASTM 13 4546)

ES Free swell, • (ASTM 0 4546) pH Hydrogen ion content - Meter Method (ASTM D 4972) SC Sulfate content, parts/million or rug/1 CC. Chloride content, parts/million or mgd

C" One dimensional consolidation (ASTM 10 2435) Qc• Triasial compression (ASTM 0 28 50 and l) 4767) DS.° Direct shear (ASTM I) 3080)

K° Coefficient of permeability, cm/sec (AsTmn 2434) P• Pinhole test (ASTM 1) 4647)

Dli• Double hydrometer (ASTM 0 4221) MA" Particle sin analysis (ASTM 0 422)

R Laboratory electrical resistivity, ohm-cm (ASTM Cl 57)

E• Pressuremeter deformation modulus, tsf (ASTM 0 4719) PM• Pressurcmetcr test (ASTIvt I) 4719) VS• Field vane shear (ASTM 0 2573) 111.• 111111am -rider test (ASTM 1) 3385) VOC Volatile organic compound content, panstmillion RQD Rock quality designation, percent

' Results shown on attached data sheet or graph • ° ASTM designates American Society for Testing and Materials

VI LA

TERMINOLOGY Particle Size Soil Layering and 'Moisture

Size Rangy 1c1111 Visual Observatio!I

Boulders >12" Lamination to 1/4" thick stratum

Cobbles

Coarse gravel 3" - 12'

3/4" - 3"

V arved A hemating laminations of any combination of clay,

silt, fine sand, or colors

Fine grade' 1r4 sieve - 3/4" Lenses Small pockets of different soils in a soil mass

Coarse sand 114 - 1110 sieve Stratified Alternating layers of varying materials or colors

Medium sand //10 ft4 0 sieve Layer 1/4" to 12" thick stratum

line sand n-10 - /no° sieve Dry Powdery, no noticeable water

Sill 100% 'sassing tr2C0 sieve and > 0.005 min Moist Damp, bclow saturation

Clay 100% passing /1200 and < 0.005 trim Waterbeartne,

Wet

Peo.aou!, soil Letow wzazr

Saturated, above liauld limit

Gravel Coa:elit Sw.- .1. • 1- ;: Pcnirtr4iion itetiistaila 1 __________________.. ._

Coarse-Gm:lie:I Soils 1 Fine-Gra:112d Sods I C:oliesienless Sails I Coliriive Soils

%L.Q.EA:Ke I 1?V..Z.I3;' .0gl `!!it.n.r.;1Y:1 Dem-o.:: noon '...; - \:_et4 f!,ti;:',iYr-lier.i...:!%, i l'.. \:"..:Iii.IA Cr vi :.!4..411..1 2 - 15 A lio!e gravel < 5 Trace or gravel 0-• Vary ',twit I 0-1 Very soft

> 3()

16 - 49 %•C;:it gr:,, c.., 5 - 15 A lt:tl.:_gra+ -:.1 i 5.9 I .o,..se ! 3- 4 Soli

31 - 40 Gravelly

l'2.1..A

> 50

30-50

Ni.,::::.m ., ...:.r.sr. i L'•?,

'....):::.s

V-zry deoLa

i.,. :5

16• .10

N4crlitan 5::1:7

Star

Very stiff

1 6 - :0 '...'.',;11 g:a.,:el

SYMBOLS ,AIND TERMINOLOGY ON TEST BORING LOGS

TiTRATECN, ,NC.

RELATIVE DENSITY

Sands & Gravels

1

SM* Blows;Ic3t

Very Loose

Lied De•.s..1 Dense Ver7

0 -4

TETRA TECH, INC.

LOGS OF EXPLORATIONS EXPLANATION OF ABBREVIATIONS AND DESCRIPTIVE TERMS

SPT

Standard penetration resistance test :1 results recorded as the number of blows Of a 140-pound hammer falling 30 inches required to drive a 2-inch O.D. split spoon the second and third 6-inch increments of an 18-inch distance.

LSS

Modified penetration test 13 results recorded as the number of blows of a 140-pound hammer falling 30 inches required to drive a 2.5-inch 0.0. split spoon the second and third 6-inch increments of an 18-inch distance.

SRS

LRS

STS •

Bulk

V or Y

ROD

Split barrel ring sampler 2-inches I.D. for taking undisturbed samples.

Spilt barrel ring sampler 2.5 inches. LLD. for taking undisturbed samples.

Shelby tube sampler for taking undisturbed samples (2" to 3-5/16" 1.0.)

Sample of disturbed soil placed. in canvas sack or plastic bag.

Groundwater level on the date shown on the logs.

Rock quality designation (ROD) for the bedrock samples are determined for each core run by summing the length of all sound, hard pieces of core over four inches in length, and dividing this number by the total length of the core run. This value, along with the core recovery percentage, is recorded on the drill logs.

GRAIN SIZES:

U.S. Standard Series Sieve. Clear Square Sieve Openings

200 . 40 10 ' 4 3/4" 3" 12"

Silts & Clays Distinguished on Basis of

Plasticity —

SAND GRAVEL Cobbles Boulders

Fine -

Medium

—

Coarse Fine Coarse - -

_

CONSISTENCY .

Clays & Silts SPT•

..... Blows/foot

Very. Sf.):t 2 Soft 3 - 4

5 -8 Stiff 5 Vory 1 -39 Hard

• . 1

TETRA TECH - Pigeon Lakepigeonlake.org/PastPlans/Tetra Tech Report of Exploration.pdf · TETRA TECH...

Documents

Transcript of TETRA TECH - Pigeon Lakepigeonlake.org/PastPlans/Tetra Tech Report of Exploration.pdf · TETRA TECH...