Garden Wood Embankment Breach - WhatDoTheyKnow · PDF fileGarden Wood Embankment Breach—Ground Investigation Factual Report ... • BS EN ISO 14688-1:2002 Geotechnical investigation

Garden Wood Embankment Breach

Ground Investigation Factual Report

Garden Wood Embankment Breach—Ground Investigation Factual Report

Hyder Consulting (UK) Limited-2212959

Hyder Consulting (UK) Limited

2212959

HCL House Fortran Road St Mellons Business Park St Mellons Cardiff CF3 0EY United Kingdom

Tel: +44 (0)29 2092 6700

Fax: +44 (0)29 2079 9275

www.hyderconsulting.com

Canal & River Trust


Ground Investigation Factual Report

Author A Mason

Checker D Hicks

Approver J Venn

Report No 0001-UA004512-21-UP32R-FA-01

Date December 2012

This report has been prepared for Canal & River Trust in accordance with the terms and conditions of

appointment for Ground Investigation Factual Report dated October 2012. Hyder Consulting (UK) Limited

(2212959) cannot accept any responsibility for any use of or reliance on the contents of this report by any

third party.


Hyder Consulting (UK) Limited-2212959 Page i

CONTENTS

1 INTRODUCTION............................................................................... 1

1.1 Limitations ........................................................................................ 1

1.2 Previously Available Information ........................................................ 1

1.3 Proposed Development ..................................................................... 1

1.4 Consultants and Sub-Contractors ...................................................... 1

1.5 Site Location and Description ............................................................ 2

1.6 Geology ............................................................................................ 2

2 STANDARD PROCEDURES............................................................. 3

2.1 Investigative Procedures ................................................................... 3

2.2 Routine Sampling .............................................................................. 3

2.3 In Situ Testing ................................................................................... 3

2.4 Groundwater ..................................................................................... 3

2.5 Buried Services ................................................................................. 3

3 FIELDWORK .................................................................................... 4

3.1 Site Works ........................................................................................ 4

3.2 Exploratory Hole Locations ................................................................ 5

3.3 Specific Sampling ............................................................................. 5

3.4 Installations / Backfilling .................................................................... 5

4 LABORATORY TESTING ................................................................. 6

4.1 Geotechnical Laboratory Testing ....................................................... 6

5 REFERENCES ................................................................................. 7


Hyder Consulting (UK) Limited-2212959 Page ii

Figures and Appendices

Figures

Figure 1 - Site Location Plan

Figure 2 – Exploratory Hole Location Plan

Appendix A

Cable Percussive Bore Hole Log

Windowless Sample Logs

Appendix B

Geotechnical Laboratory Test Results


Hyder Consulting (UK) Limited-2212959 Page 1

1 INTRODUCTION

Hyder Consulting (UK) Limited (HCL) was instructed by the Canal & River Trust (CRT) ‘the

Client’ in October 2012 to undertake a site investigation at Garden Wood Embankment, Dutton.

The purpose of the investigation was to provide information on the underlying ground conditions

to assist others in the design of remediation measures for the recent canal embankment breach.

This ground investigation report details the scope of the works and provides a factual account of

the fieldwork undertaken, the strata encountered, in situ testing and the subsequent

geotechnical testing undertaken on samples obtained during the ground investigation.

1.1 Limitations

This report has been prepared for the Client in accordance with the terms and conditions of

appointment, dated October 2012. HCL cannot accept any responsibility for any use of or

reliance on the contents of this report by any third party. The copyright of this document, which

includes the electronic format and AGS data, shall remain the property of HCL.

Additionally, this report is not to be used by the Client for engineering or contractual purposes

unless it is signed by the author, checker and approver.

It should be noted that the ground conditions between exploratory holes may vary from those

identified during this ground investigation; any design should take this into consideration. It

should also be noted that groundwater levels may be subject to diurnal, seasonal, climatic

variations and are those recorded in this report are solely dependent on the time the ground

investigation was carried out and the weather before and during the investigation.

1.2 Previously Available Information

A works and site information pack was made available prior to site investigation by CRT.

1.3 Proposed Development

The works proposed for the site are of a remedial nature as a result of the failure of a section of

the Trent and Mersey Canal at a location known as Garden Wood Embankment.

1.4 Consultants and Sub-Contractors

Table 1.1 details all parties involved with the completion of the ground investigation.



Table 1.1: Ground Investigation Parties

Contractors Hyder Consulting (UK) Ltd

Firecrest Court

Warrington

WA1 1RG

Sub-Contractors Geocore Site Investigations Ltd

Tralee Close

Kirkleatham Business Park

Redcar

TS10 5SG

Professional Soils Laboratory

5/7 Hexthorpe Road

Doncaster

South Yorkshire

DN4 0AR

1.5 Site Location and Description

The site is situated approximately 8km North-west of Northwich town centre. The National Grid

Reference (NGR) of the site is SJ 58901 77545.

The site comprised a section of the Trent & Mersey Canal known as Garden Wood

Embankment. The embankment had suffered a major breach in early October 2012 which

resulted in the failure of the southern face of the embankment and associated loss of the

towpath and a significant volume of the embankment structure and canal water in to the fields

below.

The site is centralised at the canal embankment breach and includes the surrounding fields and

associated tow path. The site is bound by agricultural fields to the northeast and southwest with

the continuation of the Trent & Mersey Canal to the northwest and southeast. As a result of the

breach, a significant volume of embankment material had been washed out and settled over the

fields below.

A site location plan is presented in Figure 1.

1.6 Geology

The published geological map incorporating the site, British Geological Survey Sheet 97

Runcorn (Solid) (Ref. 1) and British Geological Survey Sheet 97 Runcorn (Drift) (Ref. 2), shows

the bedrock geology underlying the site to comprise deposits of the Triassic, Mercia Mudstone

Group. The Preston Brook Fault passes through the site in a northwest/southeast direction with

the downthrow of the fault towards the southwest.

The superficial geology underlying the site comprises of Alluvium to the southwest of Preston

Brook Fault. These deposits are detailed as clay, silt and sand. To the northeast of the fault the

site comprises of Glacial Sand and Gravel.



2 STANDARD PROCEDURES

2.1 Investigative Procedures

All ground investigation fieldwork and laboratory testing was carried out in accordance with the

recommendations of BS5930-A2 ‘Code of Practice for Site Investigation’ (Ref. 3), BS10175

‘Investigation of Potentially Contaminated Sites: Code of Practice’ (Ref. 4).

2.2 Routine Sampling

Representative bulk samples of all strata encountered were recovered as part of the works.

These samples were taken in line with the recommendations of BS5930:1999 ‘Code of Practice

for Site Investigation’ (Ref. 3) and were stored in sealed plastic bags following logging by a

suitably qualified and experienced Geotechnical Engineer, ahead of subsequent laboratory

testing.

A HCL approved Geotechnical Engineer logged all exploratory holes in accordance with the

recommended procedures provided within:

• BS EN ISO 14688-1:2002 Geotechnical investigation and testing – Identification and

Classification of soil – Part 1: Identification and Description (Ref. 5); and

• BS EN ISO 14688-2:2004 Geotechnical investigation and testing – Identification and

Classification of soil – Part 2: Principles for a classification (Ref. 6)

2.3 In Situ Testing

All in situ testing was carried out in accordance with BS EN ISO22475-1:2006 Geotechnical

investigation and testing - Sampling methods and groundwater measurements (Ref. 7), EN

ISO22476-2:2005 Geotechnical Investigation and Testing – Field Testing (Ref. 8).

2.4 Groundwater

Where groundwater was encountered, measurements and samples were taken in accordance

with BS EN ISO22475-1:2006 Geotechnical investigation and testing - Sampling methods and

groundwater measurements (Ref. 7). Groundwater conditions observed in boreholes are those

appertaining to the period of the investigation. It should be noted that groundwater levels may

be subject to diurnal, seasonal, and climatic variations and are solely dependent on the time the

ground investigation was carried out and the weather before and during the investigation.

2.5 Buried Services

Throughout the works the Hyder Common Operating Practice ‘COP SA 1’ – Service Clearance,

was adhered to. This document details the methods and safe working practices used to

undertake excavations safely. Prior to breaking ground, services plans are consulted and the

area scanned using a Cable Avoidance Tool (CAT) with detected signals marked on the ground.

Hand excavated inspection pits are completed to 1.20m bgl prior to the use of drilling and boring

plant.

In addition to inspection pits for each of the investigation positions, a single additional hand

excavated inspection pit was completed along the towpath of the Trent & Mersey Canal to

positively identify a known buried fibre-optic service.



3 FIELDWORK

3.1 Site Works

The scoping of the ground investigation including location and depth of boreholes was

undertaken by CRT, site supervision and geotechnical logging of the samples was carried out

by HCL.

The ground investigation works were conducted along the towpath of the Trent & Mersey Canal,

the agricultural field adjacent to the canal and in the agricultural field at the toe of the

embankment.

Access to the investigation positions along the tow path was gained through a gated access

point at bridge no. 213. Access to the agricultural field adjacent to the canal was via a field

boundary gate and access to the agricultural field at the toe of the embankment was via

Meadow View Farm and across adjacent fields. This agricultural field was extremely saturated

and boggy at the time of the investigation and placed limitations upon the preferred location of

the exploratory Borehole located within this area.

An exploratory hole location plan is presented in Figure 2.

3.1.1 Cable Percussive Borehole

A single cable percussive borehole (BH1) was completed using a Dando 2000 Cable Tool

drilling rig. The borehole was positioned within the field at the toe of the embankment.

The bore hole commenced drilling from ground level and terminated at 13.00m bgl due to

refusal within the rock strata. In situ standard penetration testing was undertaken during boring.

Completed geotechnical engineering logs are presented in Appendix A.

3.1.2 Windowless Sample Holes

Three windowless sample holes were carried out during the site investigation using a Dando

Terrier percussive drilling rig.

Table 2.1 details the final depths attained within the windowless sample holes as specified by

CRT. Completed geotechnical engineering logs are presented in Appendix A.

All windowless sample holes commenced with hand excavated inspection pits to 1.20m bgl to

clear the location of buried services and advanced using percussive techniques.

Table 2.1: Windowless Sample Termination Depths

Exploratory Hole ID Termination Depth (m bgl)

WS1 6.00

WS2 6.00

WS3 6.00



3.2 Exploratory Hole Locations

The exploratory hole locations were set out by HCL and surveyed by a HCL Surveyor to an

accuracy of 0.01m. An exploratory hole location plan is presented in Figure 2 with the

corresponding borehole logs presented within Appendix A.

3.3 Specific Sampling

Bulk and disturbed samples for the purpose of geotechnical testing were taken in the borehole

and windowless sample holes.

3.4 Installations / Backfilling

No monitoring wells were installed during the ground investigation. Each position was backfilled

using bentonite pellets.



4 LABORATORY TESTING

Geotechnical laboratory testing was undertaken on selected samples obtained from the

exploratory holes with the full results included in Appendix B.

Testing of all samples was scheduled by a HCL Geotechnical Engineer and undertaken by a

HCL approved laboratory.

4.1 Geotechnical Laboratory Testing

The geotechnical tests detailed in Table 3.1 were carried out in accordance with BS1377:1990

Methods of test for soils for civil engineering purposes parts 1 to 8 (Ref. 9) and BRE Special

Digest 1:2005 Concrete in Aggressive Ground (Ref. 10). Results of the geotechnical laboratory

testing are presented in Appendix B.

Table 3.1: Geotechnical Testing Scheduled

Type of Test Standard Number of Samples

Moisture Content BS1377:1990 Part 2 4

4 Point Liquid and Plastic Limit BS1377:1990 Part 2 4

Particle Size Distribution - Wet Sieve BS1377:1990 Part 2 13

BRE Suite BRE SD1:2005 5



5 REFERENCES

1 British Geological Society (BGS) (1978). Sheet 97 Runcorn (Solid).

2 British Geological Society (BGS) (1977). Sheet 97 Runcorn (Drift).

3 British Standards Institution (BSi). BS5930:1999 Code of Practice for Site Investigations.

BSi, London.

4 BS10175:2011 Investigation of Potentially Contaminated Sites: Code of Practice

5 British Standards Institution (BSi)., 2002. BS EN ISO 14688-1:2002 Geotechnical

investigation and testing – Identification and Classification of soil – Part 1: Identification

and description. BSi, London.

6 British Standards Institution (BSi)., 2004. BS EN ISO 14688-2:2004 Geotechnical

investigation and testing – Identification and Classification of soil – Part 2: Principles for a

classification. BSi, London.

7 British Standards Institution (BSi), 2006. BS EN ISO 22475-1:2006 Ground Investigation

and Testing – Sampling Methods and Groundwater Measurements. BSi, London.

8 British Standards Institution (BSi), 2005. BS EN ISO 22476-2:2005 Geotechnical

Investigation and Testing – Field Testing. BSi. London.

9 British Standards Institution (BSi)., (1990). BS1377:1990 Parts 1 - 8 Methods of Test for

Soils for Civil Engineering Purposes. BSi, London.

10 BRE Special Digest (2005). Concrete in aggressive ground, Special Digest 1:2005, 3rd

Edition, The Concrete Centre, BRE Construction Division.

Figures


Figure 2 – Exploratory Hole Location Plan


01UA004512-210001

Garden Wood Embankment BreachFINAL

NTS

N/A

N/A

A Mason

Checker

Hyder Consulting Ltd

HCL House

Fortran Road

Cardiff

CF3 0EY

Tel: 02920 926 700Fax: 02920 799 275

Issue No.Project No.Drawing No.

Project

Title

Client Status

© Copyright Reserved

Datum

Grid

Author

Approver

Current Issue Signatures

Scale

Reproduced from the Ordnance Survey Map with the permission of the Controller of Her Majesty’s Stationary Office. Crown Copyright

Reserved. Licence No. AL813400

D Hicks

J Venn

Issue No.Project No.Drawing No.

Project

Title

Client Status

Scale

Key

Figure 2 -

Exploratory Hole Location Plan

Garden Wood Embankment

Breach

FINAL

NTSCurrent Issue Signatures

A MasonAuthor

Checker

Approver

© Copyright Reserved

N/ADatum

N/AGrid0002 UA004512-21 01

Hyder Consulting Ltd

HCL HouseFortran Road

Cardiff

CF3 0EY

Tel: 02920 926 700

Fax: 02920 799 275

Windowless Sampling Borehole

WS1

WS2WS3

D Hicks

J VennCable Tool Borehole

BH1

Appendix A

Cable Percussive Bore Hole Log

Windowless Sample Logs

1.2013.00

150 9.00

(2.00)

(4.50)

(1.50)

2.00

6.50

8.00

0.001.20

9.90

5.40

3.90

Inspection PitCable Percussion

1.50 SPTs

2.50 N=1SPTs

3.50 N=1SPTs

4.50 N=2SPTs

5.50 N=2SPTs

7.00 N=21SPTs

8.50 N=29SPTs

0.20-0.70 B1

1.50-1.95 D2

1.50-2.00 B3

2.20 D4

2.50-2.95 D5

2.50-3.00 B6

3.20 D7

3.50-3.95 D8

3.50-4.00 B9

4.20 D10

4.50-4.95 D11

4.50-5.00 B12

5.20 D13

5.50-5.95 D14

5.50-6.00 B15

6.50 D16

7.00-7.45 D17

8.00 D18

8.50-8.95 D19

8.50-9.00 B20

9.50 D21

10.00-10.45 D22

MADE GROUND: Orangish brown slightly silty, slightly gravelly SAND. Gravel is roundedto subangular, fine to coarse of mixed lithologies.

Very soft greyish brown slightly silty sandy CLAY.

4.50 - becoming slightly gravelly very sandy with depth

Brown gravelly fine to coarse SAND. Gravel is rounded, fine to medium of mixedlithologies.

Stiff, friable reddish brown occasionally grey CLAY becoming extremely weakMUDSTONE.

Termination Depth:

13.00mHand excavated inspection pit from 0.00 to 1.20m bgl. Cable tool drilling from 1.20m to 13.00m bgl. Backfilled from 13.00m to 0.00m with bentonite.

9.001.309.10 3.10

18/10/201219/10/2012

12.7013.00

9.009.00

3.103.10

Depth Casing Water TimeFrom ToHard Strata

CHISELLING

Depth(thickness)

Type/No.

SAMPLES

Depth

Hole

Install/Backfill

WATER OBSERVATIONS

Date/Time

Remarks

STRATA

DRILLING TECHNIQUE

Date/Time

Wat

erType/No. Results Legend

ReducedLevel

TESTS

Depth

PROGRESS

Depth

HOLE/CASING DIAMETER

From To

WATER ADDED

Volume TechniqueToFrom

18/10/201218/10/2012

StrikeAt

RiseTo Casing Sealed

Percussive Borehole Log

Description

Dia.Casing

Dia.Depth

HCL HouseSt Mellons Business ParkSt MellonsCardiffCF3 0EY AM DH

All depths in meters (unless otherwise stated)All diameters in mm (unless otherwise stated)Time is expressed hhmm (unless otherwise stated) Dando 2000 Cable tool drilling rig Hyder Consulting

Equipment Used Contractor Logged By Checked By

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BH1


Canal and River Trust

18-10-12

19-10-12

UA004512-21Project

Client

Project No.

Easting (OS)

Ground Level (m AOD)

Northing (OS)

Start Date

Finish Date

Sheet

Scale

358849.0 377512.0

1 of 2

12.7013.00

150 13.00

(5.00)

13.00 -1.10

01000100

10.00 N=35SPTs

12.00 N=50/209SPTs

12.70 N=50/70SPTc

13.00 N=50/31SPTc

10.00-11.00 B23

12.00-12.45 D24

Stiff, friable reddish brown occasionally grey CLAY becoming extremely weakMUDSTONE. (continued)

End of Exploratory Hole

12.3012.70

Termination Depth:

13.00mHand excavated inspection pit from 0.00 to 1.20m bgl. Cable tool drilling from 1.20m to 13.00m bgl. Backfilled from 13.00m to 0.00m with bentonite.

18/10/201219/10/2012

12.7013.00

9.009.00

3.103.10

Depth Casing Water TimeFrom ToHard Strata

CHISELLING

Depth(thickness)

Type/No.

SAMPLES

Depth

Hole

Install/Backfill

WATER OBSERVATIONS

Date/Time

Remarks

STRATA

DRILLING TECHNIQUE

Date/Time

Wat

erType/No. Results Legend

ReducedLevel

TESTS

Depth

PROGRESS

Depth

HOLE/CASING DIAMETER

From To

WATER ADDED

Volume TechniqueToFromStrikeAt

RiseTo Casing Sealed

Percussive Borehole Log

Description

Dia.Casing

Dia.Depth


All depths in meters (unless otherwise stated)All diameters in mm (unless otherwise stated)Time is expressed hhmm (unless otherwise stated) Dando 2000 Cable tool drilling rig Hyder Consulting


HY

DE

R S

ITE

INV

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18-10-12

19-10-12

UA004512-21Project

Client

Project No.

Easting (OS)


Northing (OS)

Start Date

Finish Date

Sheet

Scale

358849.0 377512.0

2 of 2

Inspection PitWindowless Sampler

(0.80)

(1.80)

(2.90)

0.20

0.50

1.30

3.10

6.00

1.20 N=1/75

2.00 N=4

3.00 N=25

4.00 N=15

5.00 N=28

6.00 N=34

0.50-0.70 B1

1.00-1.20 B2

1.20 D31.30-2.00 B4

2.00 D52.00-3.00 B6

3.00 D73.10-4.00 B8

4.00 D94.00-5.00 B10

5.00 D115.00-6.00 B12

6.00 D13

1.206.00

25.20

24.90

24.10

22.30

19.40

0.001.20

TOPSOIL: Dark brown sandy CLAY.

MADE GROUND: Dark brown gravelly fine to coarse SAND. Gravel is angular fine tocoarse sandstone brick.

MADE GROUND: Brown slightly silty slightly gravelly fine to medium SAND.

Light brown slightly silty slightly gravelly fine to medium SAND.

Light orangish brown slightly silty slightly gravelly fine to medium SAND. Gravelisround fine to coarse of mix lithologies.


6.00mHole terminated at 6.00m bgl as required. Bckfill Gl -1.2m bgl with arising and 1.2-6m bgl with bentonite. No groundwater encountered.

Depth(thickness)

Type/No.

SAMPLES

Depth

Wat

erType/No. Results

TESTS

DepthInstall/Backfill

Date/Time

PROGRESS

Date/Time Sealed

WATER OBSERVATIONS

CasingDepth Casing Water RiseTo Dia.

HOLE/CASING DIAMETERStrike

At

Window Sample Log

TechniqueToFromDepth ToFrom

Remarks

STRATAReduced

LevelLegend

Hole Dia. CasingDepth

SAMPLE RUN DETAILS DRILLING TECHNIQUE

Run Dia. Rec %

Termination Depth:

6.00mTermination Depth:


Description


All depths in meters (unless otherwise stated)All diameters in mm (unless otherwise stated)Time is expressed hhmm (unless otherwise stated) Dando Terrier window sample drilling rig Hyder Consulting


HY

DE

R S

ITE

INV

ES

TIG

AT

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SE

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INT

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2 1

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:55

25.40

1:50

WS1



16-10-12

16-10-12

UA004512-21Project

Client

Project No.

Easting (OS)


Northing (OS)

Start Date

Finish Date

Sheet

Scale

358890.0 377560.0

1 of 1


(0.40)

(1.60)

(3.90)

0.10

0.50

2.10

6.00

1.20 N=2/150

2.00 N=10

3.00 N=13

4.00 N=19

5.00 N=24

6.00 N=22

0.10-0.50 B1

0.80-1.20 B2

1.20 D31.20-2.00 B4

2.00 D52.00-3.00 B6

3.00 D73.00-4.00 B8

4.00 D94.00-5.00 B10

5.00 D115.00-6.00 B12

6.00 D13

1.206.00

25.00

24.60

23.00

19.10

0.001.20

TOPSOIL: Dark brown sandy CLAY.MADE GROUND: Light greyish brown very gravelly fine to coarse SAND. Gravel isangular to subrounded fine to coarse of brick, concrete, and sandstone.

Brown silty fine to medium SAND.

Orangish brown fine to medium SAND becoming gravelly of round fine to medium mixlithologies.

3.00 - becoming slightly silty


6.00mHole terminated at 6.00m bgl as required. Bckfill Gl -1.2m bgl with arising and 1.2-6m bgl with bentonite. No groundwater encountered.

Depth(thickness)

Type/No.

SAMPLES

Depth

Wat

erType/No. Results

TESTS


Date/Time

PROGRESS

Date/Time Sealed

WATER OBSERVATIONS



At

Window Sample Log


Remarks

STRATAReduced

LevelLegend



Run Dia. Rec %

Termination Depth:



Description




HY

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R S

ITE

INV

ES

TIG

AT

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SE

RV

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.3 W

OR

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LB L

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SA

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0/12

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2 1

6:45

:57

25.10

1:50

WS2



16-10-12

16-10-12

UA004512-21Project

Client

Project No.

Easting (OS)


Northing (OS)

Start Date

Finish Date

Sheet

Scale

358881.0 377574.0

1 of 1


(0.60)

(5.20)

0.20

0.80

6.00

1.20 N=2

2.00 N=0/0

3.00 N=12

4.00 N=8

5.00 N=29

6.00 N=50/285

0.40-0.60 B1

0.80-1.20 B2

1.20 D31.20-2.00 B4

2.00 D52.00-3.00 B6

3.00-4.00 B7

4.00 D84.00-5.00 B9

5.00 D105.00-6.00 B11

6.00 D12

1.206.00

25.80

25.20

20.00

0.001.20

TOPSOIL: Dark brown sandy CLAY.

Soft dark brown very sandy CLAY.

Orangish brown fine to medium SAND.

2.00 - becoming slightly silty and slightly gravelly with depth


6.00mHole terminated at 6.00m bgl as required. Bckfill Gl -1.2m bgl with arising and 1.2-6m bgl with bentonite.

Depth(thickness)

Type/No.

SAMPLES

Depth

Wat

erType/No. Results

TESTS


Date/Time

PROGRESS

Date/Time Sealed

WATER OBSERVATIONS



At

Window Sample Log


Remarks

STRATAReduced

LevelLegend

4.50



Run Dia. Rec %

Termination Depth:



Description




HY

DE

R S

ITE

INV

ES

TIG

AT

ION

SE

RV

ICE

S G

INT

LIB

RA

RY

VE

R 2

.3 W

OR

KIN

G.G

LB L

og S

IS W

IND

OW

SA

MP

LE L

OG

L:\G

EO

TE

CH

NIC

S\G

INT

\GIN

T P

RO

JEC

T F

ILE

S\U

A00

4512

-21

GA

RD

EN

WO

OD

EM

BA

NK

ME

NT

BR

EA

CH

.GP

J A

GS

3_1

.GD

T <

<D

raw

ingF

ileS

pec>

> 1

0/12

/201

2 1

6:45

:58

26.00

1:50

WS3



17-10-12

17-10-12

UA004512-21Project

Client

Project No.

Easting (OS)


Northing (OS)

Start Date

Finish Date

Sheet

Scale

358910.0 377574.0

1 of 1

Appendix B

Geotechnical Laboratory Test Results

LABORATORY SOIL TESTING Date Issued: Schedule Number: 1

SCHEDULE Results Required By: Sheet 1 of 3

Date Received by lab: Sample Storage Period:

Contaminated Site : No *Delete as appropriate. Report to: LD's

SAMPLE DETAILS CLASSIFICATION Other CONSOLIDATION TRIAXIAL TESTS SHEAR BOX TESTS ROCK

TESTS P.S.D Tests TESTS Tests

BH

/TP

Num

ber

.

Sam

ple

Num

ber

Sam

le T

ype

Depth (m)D

ensi

ty

Mo

istu

re C

on

ten

t

Att

erb

erg

L

imit

s 4

pt

Par

ticl

e D

ensi

ty

Sie

ve

Wet

Sed

imen

tati

on

2.5

kg

Co

mp

acti

on

4.5

kg

Co

mp

acti

on

C.B

.R.(

*2

.5/4

.5k

g)

*U

nso

ak

ed

/So

ak

ed

MC

V a

t N

MC

MC

V R

elat

ion

ship

One-

Dim

ensi

onal

Pressure Range (kPa)

3 x

38

mm

Dia

met

er

Sin

gle

Sta

ge

10

2m

m D

iam

eter

Mu

ltis

tag

e 1

02

mm

Dia

met

er

Qu

ick

Un

dra

ined

Co

nso

lid

ated

Un

dra

ined

(C

U)

Co

nso

lid

ated

Dra

ined

(C

D)

Lateral Pressure (kPa)

Qu

ick

Un

dra

ined

Co

nso

lid

ated

Dra

ined

(C

D)

CD

Pea

k a

nd

Res

idu

al

Normal

Pressures

(kPa)

pH

an

d W

SS

of

So

il

BR

E S

ho

rt s

uit

e (i

)

BR

E F

ull

su

ite

(ii)

Org

anic

Co

nte

nt

Ch

lori

de

Co

nte

nt

UC

S

Po

int

Lo

ad

BH1 1 B 0.2 x x

BH1 2 D 1.5

BH1 3 B 1.5 x x

BH1 4 D 2.2 x

BH1 5 D 2.5

BH1 6 B 2.5 x x

BH1 7 D 3.2 x x

BH1 8 D 3.5 x x

BH1 9 B 3.5 x x

BH1 10 D 4.2 x

BH1 11 D 4.5 x x

BH1 12 B 4.5 x x

BH1 13 D 5.2

BH1 14 D 5.5

BH1 15 B 5.5

BH1 16 D 6.5

BH1 17 D 7

BH1 18 D 8

BH1 19 D 8.5

BH1 20 B 8.5

BH1 21 D 9.5

BH1 22 D 10

BH1 23 B 10

BH1 24 D 12

PROJECT ENGINEER : LOCATION:

(i) BRE Short suite includes pH, WSS. Mg, Chl, Nitrate

(ii) BRE Full suite includes add total sulphur & total sulphate to the aboveAll tests are carried out to BS1377:1990 unless otherwise stated.

COMPACTION TESTSCHEMICAL

TESTS

Andy Mason - Hyder

ConsultingGarden Wood Embankment Breach UA004512-21 PSL12/PSL Contract No:

Approved By: M Beastall

Date: 20.01.11 PSLGF01 Issue No. 2

LABORATORY SOIL TESTING Date Issued: Schedule Number:






BH

/TP

Nu

mb

er.

Sam

ple

Nu

mb

er

Sam

le T

yp

e

Depth (m)

Den

sity

Mois

ture

Conte

nt

Att

erber

g

Lim

its

4 p

t

Par

ticl

e D

ensi

ty

Sie

ve

Wet

Sed

imen

tati

on

2.5

kg C

om

pac

tion

4.5

kg C

om

pac

tion

C.B

.R.(

*2.5

/4.5

kg)

*U

nso

ak

ed/S

oak

ed

MC

V a

t N

MC

MC

V R

elat

ion

ship

On

e-D

imen

sio

nal


3 x

38m

m D

iam

eter

Sin

gle

Sta

ge

102m

m D

iam

eter

Mult

ista

ge

102m

m D

iam

eter

Quic

k U

ndra

ined

Conso

lidat

ed U

ndra

ined

(C

U)

Conso

lidat

ed D

rain

ed (

CD

)


Quic

k U

ndra

ined

Conso

lidat

ed D

rain

ed (

CD

)

CD

Pea

k a

nd R

esid

ual

Normal

Pressures

(kPa)

pH

and W

SS

of

Soil

BR

E S

hort

suit

e

BR

E F

ull

suit

e

Org

anic

Conte

nt

Chlo

ride

Conte

nt

UC

S

Poin

t L

oad

WS1 1 B 0.5 x x

WS1 2 B 1

WS1 3 D 1.2

WS1 4 B 1.3 x x

WS1 5 D 2 x

WS1 6 B 2 x x

WS1 7 D 3

WS1 8 B 3.1

WS1 9 D 4

WS1 10 B 4 x x

WS1 11 D 5

WS1 12 B 5

WS1 13 D 6

WS2 1 B 0.1

WS2 2 B 0.8

WS2 3 D 1.2

WS2 4 B 1.2 x x

WS2 5 D 2 x

WS2 6 B 2

WS2 7 D 3WS2 8 B 3 x x


BRE Short suite includes pH, WSS. Mg, Chl, Nitrate

BRE Full suite includes add total sulphur & total sulphate to the aboveAll tests are carried out to BS1377:1990 unless otherwise stated.


TESTS

Andy Mason - Hyder

ConsultingGarden Wood Embankment Breach UA004512-21

PSL11/

PSL Contract No:



LABORATORY SOIL TESTING Date Issued: Schedule Number:






BH

/TP

Nu

mb

er.

Sam

ple

Nu

mb

er

Sam

le T

yp

e

Depth (m) D

ensi

ty

Mois

ture

Conte

nt

Att

erber

g

Lim

its

4 p

t

Par

ticl

e D

ensi

ty

Sie

ve

Wet

Sed

imen

tati

on

2.5

kg C

om

pac

tion

4.5

kg C

om

pac

tion

C.B

.R.(

*2.5

/4.5

kg)

*U

nso

ak

ed/S

oak

ed

MC

V a

t N

MC

MC

V R

elat

ion

ship

On

e-D

imen

sio

nal


3 x

38m

m D

iam

eter

Sin

gle

Sta

ge

102m

m D

iam

eter

Mult

ista

ge

102m

m D

iam

eter

Quic

k U

ndra

ined

Conso

lidat

ed U

ndra

ined

(C

U)

Conso

lidat

ed D

rain

ed (

CD

)


Quic

k U

ndra

ined

Conso

lidat

ed D

rain

ed (

CD

)

CD

Pea

k a

nd R

esid

ual

Normal

Pressures

(kPa)

pH

and W

SS

of

Soil

BR

E S

hort

suit

e

BR

E F

ull

suit

e

Org

anic

Conte

nt

Chlo

ride

Conte

nt

UC

S

Poin

t L

oad

WS2 9 D 4

WS2 10 B 4

WS2 11 D 5

WS2 12 B 5 x x

WS2 13 D 6

WS3 1 B 0.4 x x

WS3 2 B 0.8

WS3 3 D 1.2 x

WS3 4 B 1.2

WS3 5 D 2

WS3 6 B 2 x x

WS3 7 B 3

WS3 8 D 4

WS3 9 B 4

WS3 10 D 5

WS3 11 B 5

WS3 12 D 6


BRE Short suite includes pH, WSS. Mg, Chl, Nitrate

BRE Full suite includes add total sulphur & total sulphate to the aboveAll tests are carried out to BS1377:1990 unless otherwise stated.

Andy Mason - Hyder

ConsultingPSL Contract No:


TESTS

Garden Wood Embankment Breach UA004512-21



5 – 7 Hexthorpe Road, Hexthorpe, Doncaster DN4 0AR

tel: +44 (0)844 815 6641 fax: +44 (0)844 815 6642 e-mail: [email protected] [email protected]

A copy of the Laboratory Schedule of accredited tests as issued by UKAS is attached to this report. This certificate is issued in accordance with the accreditation requirements of the United Kingdom Accreditation Service. The results reported herein relate only to the material supplied to the laboratory. This certificate shall not be reproduced in full,

without the prior written approval of the laboratory.

Checked and Approved Signatories:

R Gunson A Watkins M Beastall (Director) (Director) (Laboratory Manager)

Page 1 of

LABO RATO RY REPO RT

4043

Contract Number: PSL12/3965

Client’s Reference: Report Date: 30 November 2012 Client Name: Hyder Consulting

St Mellons Business Park St Mellons Cardiff CF3 0EY

For the attention of: Andy Mason Contract Title: Garden Wood Embankment Breach

Date Received: 12-Nov-12 Date Commenced: 12-Nov-12 Date Completed: 30-Nov-12 Notes: Observations and Interpretations are outside the UKAS Accreditation

* Denotes test not included in laboratory scope of accreditation $ Denotes test carried out by approved contractor

SUMMARY OF LABORATORY SOIL DESCRIPTIONS

Hole Sample Sample Depth Description of Sample

Number Number Type m

BH1 1 B 0.20 Brown slightly gravelly slightly silty SAND.

BH1 3 B 1.50 Brown slightly gravelly slightly silty SAND.

BH1 6 B 2.50 Dark brown very sandy silty CLAY.

BH1 7 D 3.20 Dark brown slightly gravelly sandy silty CLAY.

BH1 8 D 3.50 Dark brown slightly gravelly sandy silty CLAY.

BH1 9 B 3.50 Brown sandy silty CLAY.

BH1 11 D 4.50 Brown sandy silty CLAY.

BH1 12 B 4.50 Brown slightly gravelly very sandy silty CLAY.

WS1 1 B 0.50 Dark brown slightly gravelly very clayey very silty SAND.

WS1 4 B 1.30 Reddish brown slightly gravelly very sandy silty CLAY.

WS1 6 B 2.00 Reddish brown slightly gravelly very clayey silty SAND.

WS1 10 B 4.00 Brown very gravelly clayey silty SAND.

WS2 4 B 1.20 Brown mottled grey slightly gravelly clayey silty SAND.

WS2 8 B 3.00 Reddish brown gravelly slightly clayey silty SAND.

WS2 12 B 5.00 Brown gravelly silty SAND.

WS3 1 B 0.40 Brown gravelly very sandy silty CLAY.

WS3 6 B 2.00 Reddish brown slightly gravelly slightly silty SAND.

Compiled by Date Checked by Date Approved by Date

30/11/12 30/11/12 30/11/12

Contract No:

Client Ref: UA004512-21

PSL12/3965GARDEN WOOD EMBANKMENT BREACH.

Page of .

SUMMARY OF SOIL CLASSIFICATION TESTS(B.S. 1377 : PART 2 : 1990)

Moisture Bulk Dry Particle Liquid Plastic Plasticity %Hole Sample Sample Depth Content Density Density Density Limit Limit Index Passing Remarks

Number Number Type m % Mg/m3 Mg/m3 Mg/m3 % % % .425mm

Clause 3.2 Clause 7.2 Clause 7.2 Clause 8. Clause 4.3/4.4 Clause 5. Clause 6.

BH1 7 D 3.20 31 45 21 24 96

BH1 8 D 3.50 35 37 19 18 100

BH1 11 D 4.50 37 41 21 20 100

WS3 1 B 0.40 17 28 15 13 88

SYMBOLS : NP : Non Plastic * : Liquid Limit and Plastic Limit Wet Sieved.


30/11/12 30/11/12 30/11/12

PSL12/3965

UA004512-21GARDEN WOOD EMBANKMENT BREACH.

Contract No:

Client Ref:

Intermediate plasticity CI.



Low plasticity CL.

PSLR002 Issue 1 Jun 06 Page of .

PLASTICITY CHART FOR CASAGRANDE CLASSIFICATION.(B.S.5930 : 1999)


30/11/12 30/11/12 30/11/12

PSL12/3965

UA004512-21GARDEN WOOD EMBANKMENT BREACH.

Contract No:

Client Ref:

0

10

20

30

40

50

60

70

80

90

0 10 20 30 40 50 60 70 80 90 100 110 120 130

Liquid Limit (LL%).

Pla

stic

ity In

de

x (P

I%).

CL CI CH CV CE

ML MI MH MV ME

PSLR002 Issue 1 Jun 06 Page of .

Hole Number: BH1 Depth (m): 0.20

Sample Number: 1 Sample Type: B

BS Test Percentage 1 1 Soil TotalSieve Passing 1 1 Fraction Percentage125 100 1 175 100 1 1 Cobbles 063 100 1 1 Gravel 7

37.5 100 1 1 Sand 8920 98 1 1 Silt / Clay 410 95 1 16.3 953.35 94

2 931.18 92 Remarks:0.6 88 See summary of soil descriptions.0.3 58

0.212 270.15 120.063 4 Checked By Date Approved By Date

30/11/12 30/11/12

GARDEN WOOD EMBANKMENT BREACH.

Contract No.:PSL12/3965

Particle Size Distribution TestBS1377 : Part 2 : 1990

Wet Sieve, Clause 9.2

0.21

2

6.3

10.0

63 75 125

37.5

0.06

3

1.18

0.60

0

0.30

0

20.0

0.02

0

0.00

6

0.00

2

2.00

0.15

0

3.35

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

0.0001 0.001 0.01 0.1 1 10 100 1000Particle Size (mm).

Per

cen

tage

Pas

sin

g.

Page of




37.5 100 1 1 Sand 8920 100 1 1 Silt / Clay 410 97 1 16.3 973.35 95



30/11/12 30/11/12




Wet Sieve & Pipette Analysis, Clause 9.2 & 9.4

0.21

2

6.3

10.0

63 75 125

37.5

0.06

3

1.18

0.60

0

0.30

0

20.0

0.02

0

0.00

6

0.00

2

2.00

0.15

0

3.35

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

0.0001 0.001 0.01 0.1 1 10 100 1000Particle Size (mm).

Per

cen

tage

Pas

sin

g.

Page of



BS Test Percentage Particle Percentage Soil TotalSieve Passing Diameter Passing Fraction Percentage125 100 2 275 100 0.02 32 Cobbles 063 100 2 2 Gravel 0

37.5 100 0.006 23 Sand 5320 100 2 2 Silt 3010 100 0.002 17 Clay 176.3 1003.35 100



30/11/12 30/11/12





0.21

2

6.3

10.0

63 75 125

37.5

0.06

3

1.18

0.60

0

0.30

0

20.0

0.02

0

0.00

6

0.00

2

2.00

0.15

0

3.35

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

0.0001 0.001 0.01 0.1 1 10 100 1000Particle Size (mm).

Per

cen

tage

Pas

sin

g.

Page of




37.5 100 0.006 21 Sand 5920 100 2 2 Silt 2410 100 0.002 16 Clay 166.3 1003.35 100



30/11/12 30/11/12





0.21

2

6.3

10.0

63 75 125

37.5

0.06

3

1.18

0.60

0

0.30

0

20.0

0.02

0

0.00

6

0.00

2

2.00

0.15

0

3.35

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

0.0001 0.001 0.01 0.1 1 10 100 1000Particle Size (mm).

Per

cen

tage

Pas

sin

g.

Page of




37.5 100 0.006 22 Sand 5520 100 2 2 Silt 2610 100 0.002 18 Clay 186.3 1003.35 99



30/11/12 30/11/12





0.21

2

6.3

10.0

63 75 125

37.5

0.06

3

1.18

0.60

0

0.30

0

20.0

0.02

0

0.00

6

0.00

2

2.00

0.15

0

3.35

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

0.0001 0.001 0.01 0.1 1 10 100 1000Particle Size (mm).

Per

cen

tage

Pas

sin

g.

Page of

Hole Number: WS1 Depth (m): 0.50



37.5 100 0.006 11 Sand 7120 98 2 2 Silt 1410 95 0.002 9 Clay 96.3 953.35 95



30/11/12 30/11/12





0.21

2

6.3

10.0

63 75 125

37.5

0.06

3

1.18

0.60

0

0.30

0

20.0

0.02

0

0.00

6

0.00

2

2.00

0.15

0

3.35

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

0.0001 0.001 0.01 0.1 1 10 100 1000Particle Size (mm).

Per

cen

tage

Pas

sin

g.

Page of




37.5 100 0.006 18 Sand 6020 99 2 2 Silt 2110 97 0.002 14 Clay 146.3 973.35 96



30/11/12 30/11/12





0.21

2

6.3

10.0

63 75 125

37.5

0.06

3

1.18

0.60

0

0.30

0

20.0

0.02

0

0.00

6

0.00

2

2.00

0.15

0

3.35

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

0.0001 0.001 0.01 0.1 1 10 100 1000Particle Size (mm).

Per

cen

tage

Pas

sin

g.

Page of




37.5 97 0.006 11 Sand 7420 95 2 2 Silt 1110 94 0.002 8 Clay 86.3 943.35 94



30/11/12 30/11/12





0.21

2

6.3

10.0

63 75 125

37.5

0.06

3

1.18

0.60

0

0.30

0

20.0

0.02

0

0.00

6

0.00

2

2.00

0.15

0

3.35

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

0.0001 0.001 0.01 0.1 1 10 100 1000Particle Size (mm).

Per

cen

tage

Pas

sin

g.

Page of




37.5 100 1 1 Sand 6020 95 1 1 Silt / Clay 910 83 1 16.3 783.35 73



30/11/12 30/11/12





0.21

2

6.3

10.0

63 75 125

37.5

0.06

3

1.18

0.60

0

0.30

0

20.0

0.02

0

0.00

6

0.00

2

2.00

0.15

0

3.35

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

0.0001 0.001 0.01 0.1 1 10 100 1000Particle Size (mm).

Per

cen

tage

Pas

sin

g.

Page of




37.5 100 0.006 14 Sand 7120 100 2 2 Silt 1810 100 0.002 10 Clay 106.3 1003.35 99



30/11/12 30/11/12





0.21

2

6.3

10.0

63 75 125

37.5

0.06

3

1.18

0.60

0

0.30

0

20.0

0.02

0

0.00

6

0.00

2

2.00

0.15

0

3.35

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

0.0001 0.001 0.01 0.1 1 10 100 1000Particle Size (mm).

Per

cen

tage

Pas

sin

g.

Page of




37.5 100 0.006 5 Sand 7420 99 2 2 Silt 710 97 0.002 4 Clay 46.3 963.35 88



30/11/12 30/11/12





0.21

2

6.3

10.0

63 75 125

37.5

0.06

3

1.18

0.60

0

0.30

0

20.0

0.02

0

0.00

6

0.00

2

2.00

0.15

0

3.35

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

0.0001 0.001 0.01 0.1 1 10 100 1000Particle Size (mm).

Per

cen

tage

Pas

sin

g.

Page of




37.5 100 1 1 Sand 7420 94 1 1 Silt / Clay 710 87 1 16.3 873.35 83



30/11/12 30/11/12





0.21

2

6.3

10.0

63 75 125

37.5

0.06

3

1.18

0.60

0

0.30

0

20.0

0.02

0

0.00

6

0.00

2

2.00

0.15

0

3.35

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

0.0001 0.001 0.01 0.1 1 10 100 1000Particle Size (mm).

Per

cen

tage

Pas

sin

g.

Page of




37.5 100 1 1 Sand 9420 100 1 1 Silt / Clay 510 100 1 16.3 1003.35 99



30/11/12 30/11/12





0.21

2

6.3

10.0

63 75 125

37.5

0.06

3

1.18

0.60

0

0.30

0

20.0

0.02

0

0.00

6

0.00

2

2.00

0.15

0

3.35

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

0.0001 0.001 0.01 0.1 1 10 100 1000Particle Size (mm).

Per

cen

tage

Pas

sin

g.

Page of

2531

Contract no:

Contract name:

Client reference:

Clients name:

Clients address:

Samples received:

Analysis started:

Analysis completed:

Report issued:

Notes:

Key:

I/S Insufficient sample to carry out test

N/S Sample not suitable for testing

Approved by:

Karan Campbell John Campbell

Director Director

Professional Soils Laboratory

19 November 2012

19 November 2012

23 November 2012

5-7 Hexthorpe Road

ANALYTICAL TEST REPORT

46598


PSL12/3965

$ Test carried out by an approved subcontractor

Doncaster

DN4 0AR

U UKAS accredited test

Opinions and interpretations expressed herein are outside the UKAS accreditation scope.

Samples will be disposed of 6 weeks from initial receipt unless otherwise instructed.

Unless otherwise stated, Chemtech Environmental Ltd were not responsible for sampling.

23 November 2012

M MCERTS & UKAS accredited test

This report shall not be reproduced except in full, withour prior written approval.

Results reported herein relate only to the material supplied to the laboratory.

Methods, procedures and performance data are available on request.

Unit 25a-25b Number One Industrial Estate, Consett, County Durham, DH8 6TJ

Tel 01207 581260 Fax 01207 581582 Email [email protected]

Vat Reg No. 772 5703 18 Reg in England No. 4284013

Page 1 of 3 Pages

Chemtech Environmental Limited

SOILS

Lab number 46598-1 46598-2 46598-3 46598-4 46598-5

Sample id BH 1 BH 1 WS 1 WS 2 WS 3

Depth (m) 2.20 4.20 2.00 2.00 1.20

Date sampled - - - - -

Test Method Units

pH CE004 M units 7.8 7.6 8.2 8.2 7.9

Magnesium (2:1 water soluble) CE120 g/l Mg <0.01 <0.01 <0.01 <0.01 <0.01

Chloride (2:1 water soluble) CE049 U g/l Cl 0.01 0.02 <0.01 <0.01 <0.01

Nitrate (2:1 water soluble) CE049 U g/l NO3 <0.01 <0.01 <0.01 <0.01 <0.01

Sulphate (2:1 water soluble) CE061 M g/l SO4 0.11 0.09 0.02 0.04 <0.01

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Page 2 of 3 Pages

Chemtech Environmental Limited

METHOD DETAILS

METHOD SOILS METHOD SUMMARY SAMPLE STATUS LOD UNITS

CE004 pH Based on BS 1377, pH Meter Wet M - units

CE120 Magnesium (2:1 water soluble) Aqueous extraction, ICP-OES Dry 0.01 g/l Mg

CE049 Chloride (2:1 water soluble) Aqueous extraction, IC-COND Dry U 0.01 g/l Cl

CE049 Nitrate (2:1 water soluble) Aqueous extraction, IC-COND Dry U 0.01 g/l NO3

CE061 Sulphate (2:1 water soluble) Aqueous extraction, ICP-OES Dry M 0.01 g/l SO4

46598


PSL12/3965

Page 3 of 3 Pages

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