LAFARGE TARMAC - Welwyn Hatfield Borough Council

LAFARGE TARMAC

FACTUAL REPORT

on

GROUND INVESTIGATION

at

COLE GREEN

WELWYN GARDEN CITY

JUNE 2014

REPORT NO: 561259

ROYAL HASKONINGDHV 2 Abbey Gardens Great College Street Westminster LONDON SW1P 3NL

STRUCTURAL SOILS LIMITED 18 Frogmore Road Hemel Hempstead

HERTFORDSHIRE HP3 9RT

Tel: 0207 2222115 Tel: 01442 416 660 Fax: 0207 222 2659 Fax: 01442 437 550 Email: [email protected] Email: [email protected] www.royalhaskoningdhv.com www.soils.co.uk

STRUCTURAL SOILS LIMITED 18 Frogmore Road Hemel Hempstead HERTFORDSHIRE HP3 9RT Tel: 01442 416660 Fax: 01442 437550

DOCUMENT ISSUE RECORD

Contract No: 561259

Client: Lafarge Tarmac

Contract: Cole Green, Welwyn Garden City

Document: Factual Report on Ground Investigation

Prepared by:

p.p. L Montgomery / M Spencer-Phillips

Approved by:

A Cattell

Date: 26 June 2014

REVISION RECORD Revision Date Description Prepared by

Table of Contents

561259r.original.doc Page 3 Structural Soils Limited

1 INTRODUCTION 4

2 SITE DESCRIPTION 5

2.1 Location and Topography 2.2 Geology 2.3 Hydrogeology & Hydrology

3 FIELDWORK 8

4 GROUND CONDITIONS 11

4.1 General 4.2 Topsoil, Made Ground and Fill 4.3 Lowestoft Till Formation 4.4 Kesgrave Catchment Subgroup 4.5 Chalk 4.6 Groundwater

5 SUMMARY 14

6 REFERENCES 15

APPENDIX A i

(i) Site Location Plan (ii) Exploratory Hole Location Plan

APPENDIX B ii

(i) Key to Exploratory Hole Logs (ii) Borehole Logs (iii) Trial Pit Logs

APPENDIX C iii

(i) Permeability Test Results

Report on Ground Investigation – Cole Green Lafarge Tarmac

561259r Page 4 Structural Soils Limited

1 INTRODUCTION

This investigation was carried out on the instructions of Royal HaskoningDHV on behalf of

Lafarge Tarmac.

This report details the work carried out both on site and in the geotechnical and chemical testing

laboratories; it contains a description of the site and the works undertaken, the exploratory hole

logs and laboratory testing results.

The ground investigation has been carried out using techniques, in general accordance with the

recommendations of BS5930: 1999 Code of Practice for Site Investigations. Whilst every

attempt is made to record full details of the strata encountered in the exploratory holes,

techniques of hole formation and sampling will inevitably lead to disturbance, mixing or loss of

material in some soils and rocks.

The investigation has also been carried out in accordance with BS10175 Investigation of

Potentially Contaminated Sites: Code of Practice (2011).

A comprehensive desk study, other than an inspection of geological maps, has not been

requested or undertaken as part of this investigation. Nor has a preliminary risk assessment been

completed.

All information given in this report is based on the ground conditions encountered during the site

work, and on the results of laboratory and field tests performed during the investigation.

However, there may be conditions at the site that have not been taken into account, such as

unpredictable soil strata, contaminant concentrations, and water conditions between or below

exploratory holes. It should be noted that groundwater levels usually vary due to seasonal and/or

other effects and may at times differ to those measured during the investigation.

This report was prepared by Structural Soils Limited for the sole and exclusive use of Lafarge

Tarmac in response to particular instructions. Any other parties using the information contained

in this report do so at their own risk and any duty of care to those parties is excluded. No

liability will be accepted after a period of 6 years from the date of the report.



2 SITE DESCRIPTION

2.1 Location and Topography

The site is located to the south of Holwell Hyde Lane, approximately 4km south-east from the

centre of Welwyn Garden City (see Site Location Plan in Appendix A). The British National

Grid Reference of the site is TL 264 106.

The site is a roughly L-shaped plot covering an area of approximately 66ha. Adjoining the plot

to the northwest is a 94ha area of land which has been subjected to mineral extractions then

backfilled with various types of waste before being capped and landscaped. The ground

investigation is on land that has not been subject to mineral extraction or landfill.

The site consists of four large fields which are currently used for agricultural purposes by tenant

farmers all of which can be accessed from two tracks which run north-south across the site. The

fields on the west of the site are surrounded by mature trees up to 10m in height and ditch drains

running southwards. There are two isolated areas of woodland in the southern area of the site.

The site generally slopes 1m for every 40m towards the south-south-west.

Further access to the site can be gained to the north from Holwell Hyde Lane and from a locked

gate off the A414 to the south. A small lake is present to the north of the site.

2.2 Geology

Information on the geology of the site was obtained from the following sources published by the

British Geological Survey (BGS):

BGS map (sheet 239, scale 1:50,000, published 1924).

The BGS digital geology map, which utilises the most up to date names for geological

units (www.bgs.ac.uk/data).

The BGS Lexicon of Named Rock Units, which provides typical descriptions for most

geological units (www.bgs.ac.uk/lexicon).

Information on geology obtained as part of the desk study, which is drawn from the BGS

digital map.



The site is shown to be underlain by the following descending sequence of strata:

TABLE 1: SUMMARY OF EXPECTED SITE GEOLOGY

Geological Unit Name Description

Lowestoft Formation Formally known as Lowestoft Boulder Clay and Lowestoft Till Formation shown to be Quaternary in age. It is described as chalky till, together with outwash sands and gravels, silts and clays.

Kesgrave Catchment Subgroup Shown to be Quaternary in age and described as fluvial moderately sorted sands and gravels.

White Chalk Subgroup Formally known as the Upper Chalk Group and consisting of the Lewes Nodular Chalk Formation and the Seaford Chalk Formation (undifferentiated). Shown to be Cretaceous in age. It is described as chalk with flints. With discrete marl seams, nodular chalk, sponge-rich and flint seams throughout.

Note: Information obtained from BGS digital records © NERC. The British Geological Survey website shows the south-west site to be underlain by the

Kesgrave Catchment Subgroup. The rest of the site is shows to be underlain by the Lowestoft

Formation.

The Kesgrave Catchment Subgroup and Lowestoft Formation are underlain by the White Chalk

Subgroup.

2.3 Hydrogeology & Hydrology

The Environment Agency (EA) website has classified part of the site’s Drift Deposits (Kesgrave

Catchment Subgroup) as a Secondary ‘A’ Aquifer (variably permeable) and the site’s solid

geology (White Chalk Subgroup) as a Principal Aquifer (highly permeable).

‘Principal’ Aquifers are layers of rock or drift deposits that have high inter-granular and/or

fracture permeability - meaning they usually provide a high level of water storage. They may

support water supply and/or river base flow on a strategic scale. In most cases, principal aquifers

are aquifers previously designated as major aquifers.

‘Secondary’ aquifers include a wide range of rock layers or drift deposits with an equally wide

range of water permeability and storage. Secondary ‘A’ Aquifers are permeable layers capable of

supporting water supplies at a local rather than strategic scale, and in some cases forming an

important source of base flow to rivers. These are generally aquifers formerly classified as minor

aquifers.



The EA defines zones around groundwater abstractions used for public water supply as being

Source Protection Zones (SPZ). The Zones are defined by the estimated travel time of potential

contaminants to the abstractions. This travel time can be influenced by factors such as the

underlying geology or the volume of groundwater being abstracted. Source Protection Zones are

therefore areas that may be particularly sensitive to groundwater impact.

The site is located within a SPZ I (inner), SPZ II (outer) and SPZ III (total catchment). The

public water supply abstraction associated with the Source Protection Zone is located at the

100m south of the southern boundary of the site. Therefore the groundwater beneath the site is

likely to be flowing in a southern direction. From BGS borehole logs in the area the estimated

groundwater level is approximately 9.00m below ground level.



3 FIELDWORK

3.1 Scope of Works

The following works were completed between 5 and 9 December 2013, 6 and 10 January 2014

and 6 and 14 May 2014 at locations shown on the Exploratory Hole Location Plan in Appendix

A:

TABLE 2: SCOPE OF INTRUSIVE WORKS AND IN-SITU TESTING

Number Exploratory Hole or In-Situ Test Type Hole / Test Numbers

23 Cable Percussion Boreholes. BH1 to BH7, BH9 to BH24

10 Machine Dug Trial Pits. TP1 to TP10

2 Falling Head Permeability Tests. BH3, BH21

The machine dug trial pits were completed between the 5 and 9 December 2013, cable

percussion borehole locations BH3, BH4, BH16, BH18-BH22 were complete between 6 and 10

January 2014 however very poor ground conditions caused by bad weather caused the remaining

site work to be postponed. Works were completed between 6 and 14 May 2014 completing

cable percussion borehole locations BH1, BH2, BH5-BH7, BH9- BH15, BH17, BH24.

The positions were selected by Lafarge Tarmac and set out by Structural Soils Limited in

conjunction with Royal Haskoning DHV and adjusted where necessary to take account of buried

or overhead services, or other restrictions.

The exploratory holes were logged by an engineer in general accordance with the

recommendations of BS5930: 1999 (2010 Amendment 2, which incorporates the requirements of

BS EN ISO 14688-1, 14688-2 and 14689-1) and CIRIA Report C574 Engineering in Chalk.

Detailed descriptions, together with relevant comments, are given in the logs included in

Appendix B.

Prior to the commencement of any exploratory hole or intrusive test a cable avoidance scan was

carried out using a cable avoidance tool (CAT).

Inspection pits were hand dug at cable percussion borehole locations where noted on the relevant

exploratory hole logs or in-situ test results.

On completion of the works, a survey of the exploratory hole locations was undertaken using

specialist Global Positioning System (GPS) equipment. The coordinates of each exploratory



hole were measured relative to British National Grid, and the level relative to Ordnance Datum.

These are shown on the exploratory hole logs contained in Appendix B which have been printed

with a reduced level column.

3.2 Cable Percussion Boreholes

The boreholes were drilled using a cable tool percussion drilling rig and were 150mm diameter.

The depths of the boreholes were 3.00m to 10.5m and they encountered variable geology

generally consisting of topsoil and made ground over sandy clay and diamiction over sand and

gravels over chalk.

100mm diameter undisturbed samples were recovered from the cohesive strata in the boreholes

using a thin walled UT100 sampler compliant with the specification for thin walled samplers

contained in BS EN ISO 22475-1.

Bulk soil samples were taken from the boreholes at regular intervals and every change in strata.

3.3 Trial Pits

The trial pits were excavated using a mechanical excavator and were approximately 1.50m x

6.00m in plan area and up to 5.00m deep. The trial pits encountered ploughed topsoil over sandy

clay or gravelly sand over diamiction (Lowestoft Formation) or sand and gravels (Kesgrave

Catchment Subgroup).

Bulk soil samples were taken from the trial pits at regular intervals.

3.4 Backfill, Monitoring Wells and Installations

On completion 50mm diameter gas/groundwater monitoring wells were installed in all

exploratory boreholes, the design having been decided by Royal HaskoningDHV with exception

of BH21. The installation details are shown on the exploratory hole logs in Appendix B.

The well details are also summarised below:

TABLE 3: SUMMARY OF MONITORING WELL INSTALLATIONS

Location Well

Diameter (mm)

Well Depth (m bgl)

Well Response Zone (m bgl)

Type of Cover

Notes

BH1 50 5.50 2.50 Upstanding Gas/Groundwater BH2 50 4.00 2.00 Upstanding Gas/Groundwater BH3 50 4.00 1.00 Upstanding Gas/Groundwater BH4 50 5.00 1.00 Upstanding Gas/Groundwater BH5 50 5.00 2.00 Upstanding Gas/Groundwater BH6 50 10.00 7.00 Upstanding Gas/Groundwater



BH7 50 3.00 1.00 Upstanding Gas/Groundwater BH9 50 5.50 4.00 Upstanding Gas/Groundwater BH10 50 9.00 8.00 Upstanding Gas/Groundwater BH11 50 6.50 1.00 Upstanding Gas/Groundwater BH12 50 7.50 6.00 Upstanding Gas/Groundwater BH13 50 9.00 6.00 Upstanding Gas/Groundwater BH14 50 5.00 2.50 Upstanding Gas/Groundwater BH15 50 10.00 5.00 Upstanding Gas/Groundwater BH16 50 3.80 1.00 Upstanding Gas/Groundwater BH17 50 3.00 1.00 Upstanding Gas/Groundwater BH18 50 5.00 1.00 Upstanding Gas/Groundwater BH19 50 4.00 1.00 Upstanding Gas/Groundwater BH20 50 1.80 0.80 Upstanding Gas/Groundwater BH21 50 10.00 1.00 Upstanding Gas/Groundwater BH22 50 5.00 1.00 Upstanding Gas/Groundwater BH23 50 10.50 1.00 Upstanding Gas/Groundwater BH24 50 7.00 5.00 Upstanding Gas/Groundwater

On completion around the instalation all exploratory holes were backfilled with arisings, gravel

and bentonite pellets. The trial pits were backfilled with arisings, compacted in layers by the

excavator bucket.

The client or site owner should ensure that the monitoring wells (and their protective covers) are

not damaged or covered until such time as information is no longer required from them. Extra

costs would be incurred if it were necessary to reinstate damaged wells.

3.5 In-Situ Testing

2 no. falling head permeability tests were undertaken in selected monitoring wells in accordance

with BS5930: part 4 (1999). The test results are present in tabular and graphical format in

Appendix C.

3.6 Monitoring and Post Fieldwork Environmental Sampling

The wells were purged of three well volumes of groundwater (unless indicated otherwise on the

monitoring results) on the 28 May 2014.



4 GROUND CONDITIONS

4.1 General

The exploratory holes were logged by an engineer and the ground conditions encountered are

detailed on the logs contained in Appendix B. The exploratory holes encountered the following

general descending sequence of strata:

TABLE 3: SUMMARY OF GROUND CONDITIONS

Strata Exploratory holes

encountered in

Depth to top of stratum

m bgl

Thickness (m)

TOPSOIL BH16, BH18, BH19, TP1-TP7 0.00 0.05 – 0.60

MADE GROUND BH3, BH4, BH18, BH20-BH23 0.00 – 0.10 0.50 – 2.10

FILL BH4 0.45 0.25

SUPERFICIAL DEPOSITS BH1, BH2, BH5, BH6, BH14,

BH17, BH19 0.00 – 0.60 0.5 – 1.90

LOWESTOFT TILL FORMATION: Firm to hard sandy slightly gravelly CLAY

BH1, BH2, BH4, BH5, BH9-BH24, TP1, TP2, TP4. TP5,TP7,

TP9 0.35 – 9.20 0.40 – 6.50

LOWESTOFT TILL FORMATION: Gravelly medium to coarse SAND./

GRAVEL

BH1, BH14, BH15, BH16 BH17, BH21, BH22

0.35 – 2.50 1.00 – 4.50

KESGRAVE CATCHMENT SUBGROUP: Clayey slightly

gravelly medium SAND

BH2-BH4-BH7, BH10, BH13, BH18, BH23, TP3, TP6

0.00 – 9.80 0.60 – 9.20

CHALK BH5, BH6 5.20 – 5.30 0.80 – 4.70

The Lowestoft Till Formation was encountered in the majority of the site with depths to top of

stratum ranging from 0.50m to 9.2m below ground level. The Lowestoft Till Formation’s glacial

outwashed sands and gravel units were encountered throughout the site with the Lowestoft Till

Formation. Thick units of Kesgrave Catchment Subgroup were encountered in the north eastern

corner of the site with thicknesses up to 9.20m in BH10. Kesgrave Catchment Subgroup gravels

were also encountered in the south and south western corner of the site with thicknesses ranging

from 0.6m – 4.5m. Chalk was encountered on the far southern boundary of the site in BH 5 and

BH6 at depth of 5.20m and 5.30 respectively.

The ground conditions are summarised in more detail below.



4.2 Topsoil, Made Ground and Fill

The topsoil was up to 0.60m thick where present and consisted of soft to firm friable orangish

brown sandy slightly gravelly CLAY.

The made ground comprised slightly silty gravelly SAND with cobbles. In BH20 and BH22 the

made ground comprised of soft to firm slightly gravelly slightly sandy CLAY/SILT with low

cobble content. Anthropogenic (man-made) components of all the made ground included fine to

coarse subangular to angular brick and concrete.

The fill comprised slightly clayey very sandy GRAVEL. It was only encountered in BH4 at

0.45m depth and was 0.25m thick.

4.3 Lowestoft Till Formation

The Lowestoft Till Formation comprised of firm to hard sandy slightly gravelly CLAY with

occasional thick to very thick beds of medium to coarse SAND/GRAVEL. The Lowestoft Till

Formation was encountered widely throughout the site however notable exception in the

exploratory holes along the southern boundary of the site – BH6, BH7, TP3, and TP6.

4.4 Kesgrave Catchment Subgroup

The Kesgrave Catchment Subgroup comprised of clayey slightly gravelly medium SAND to

clayey sandy medium to coarse GRAVEL.

4.5 Chalk

In BH6 and BH7 the Kesgrave Catchment Subgroup was underlain by Chalk generally

composed of sandy slightly gravelly silt. The CIRIA Report C574 Engineering in Chalk

classifies this chalk as Grade DM.

4.6 Groundwater

Groundwater was encountered during the investigation in BH1, BH3, BH4, BH9-14, BH16-

BH24, TP1, TP2 TP5, TP9 at depths ranging from depths of 0.30m to 7.5m below ground level.

On encountering groundwater in the cable percussion boreholes, boring operations were

suspended for a period of 20 minutes and any rise in groundwater level recorded, as detailed on

the borehole logs.



The boreholes had water added to them to aid drilling due to ground conditions, therefore

groundwater strikes may not have been observable, and/or any standing water levels recorded

may have been influenced by the addition of water.

Groundwater levels in the monitoring wells installed on site were measured (see Section 3).

Standing ground water levels of 0.30m to 5.04m were recorded. The monitoring results are

contained in Appendix C.



5 SUMMARY

5.1 Works were undertaken to access the possible ground gas contamination due to the

site’s close proximity to disused waste site.

5.2 The site is present at Cole Green, Welwyn Garden City and contains a collection of

large plough fields separated by access tracks, small patches of woodland and open

drainage ditches.

5.3 The investigation has revealed the general geology to be firm to stiff orangish brown

sandy clay with unconformable beds of gravel/sand over stiff dark grey clay with gravel

over structureless cream chalk. The chalk was encountered in the southern most

boreholes of the site.

5.4 The sites lies on a Secondary ‘A’ Aquifer as well as a Principal Aquifer due to the site’s

Drift and Solid geology. The site lies within a SPZ I (inner), SPZ II (outer) and SPZ III

(total catchment) zone.

5.5 An intrusive investigation comprising twenty three cable percussion boreholes and ten

machine-dug trial pits were carried out along with geotechnical and chemical analysis

of soil samples in the laboratory.

5.6 50mm diameter gas/groundwater monitoring wells were installed in all exploratory

boreholes.

5.7 Groundwater level varied significantly over the site with the exploratory holes in the

northern area of the site encountering groundwater at approximately 66m to 71m

relative level, and no groundwater encountered in the majority of exploratory holes in

the southern area of the site.

STRUCTURAL SOILS LIMITED

p.p. M Spencer-Phillips MSci (Hons) FGS A Cattell BSc PhD CGeol FGS



6 REFERENCES

6.1 BS 5930:1999 Code of Practice for Site Investigation, including amendment A2 (2010)

6.2 BS 10175:2011 Investigation of potentially contaminated sites: Code of practice,

including amendment A1 (2013)

6.3 British Geological Survey sheet 239 scale 1:50,000, published 1924

6.4 British Geological Survey online digital geological map, www.bgs.ac.uk/data

6.5 British Geological Survey Lexicon of Named Rock Units, www.bgs.ac.uk/lexicon

6.6 Environment Agency website, www.environment–agency.gov.uk

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

classification of soil: Part 1: Identification and description, including Amendment A1

(2013)

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

classification of soil: Part 2: Principles for a classification , including Amendment A1

(2013)

6.9 CIRIA Report C574 Engineering In Chalk (2002)

6.10 BS EN ISO 22475-1:2006 Geotechnical Investigation and Testing - Sampling and

Groundwater Measurements - Technical Principles

6.11 BS 1377:1990 Methods of Test for Soils for Civil Engineering Purposes

561259r.original.doc Page i Structural Soils Limited

APPENDIX A

(i) Site Location Plan

(ii) Exploratory Hole Location Plan

561259r.original.doc Page ii Structural Soils Limited

APPENDIX B

(i) Key to Exploratory Hole Logs

(ii) Borehole Logs

(iii) Trial Pit Logs

Contract Reference: 561259STRUCTURAL SOILSSTRUCTURAL SOILS

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SAMPLING

Sample type codes

B = Bulk disturbed sample.U = Undisturbed driven tube sample - Number of blows indicated. % recovery reported.

Undisturbed sample detail codes

U(UT100) = Undisturbed sample UT100

IN-SITU TESTING

HP = Hand Penetrometer Test. Value given as shear strength cu, in kPa.

ADDITIONAL NOTES

1. All soil and rock descriptions and legends in general accordance with BS EN ISO 14688-1, 14688-2, 14689-1, andBS5930:1999 including Amendment 2 (2010).2. Material types divided by a broken line (- - - ) indicates an unclear boundary.3. The data on any sheet within the report showing the AGS icon is available in the AGS format.

KEY TO EXPLORATORY HOLE LOGS - SUMMARY OF ABBREVIATIONS

Contract Reference: 561259STRUCTURAL SOILS

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KEY TO EXPLORATORY HOLE LOGS - SUMMARY OF GRAPHIC SYMBOLS

Standing water level recorded at documented date.

Standing water level following first strike, standing water level following second strike etc.

WATER COLUMN SYMBOLS

Seepage.

First water strike, second water strike etc.

MATERIAL GRAPHIC LEGENDS

CLAYClayeygravellySAND

GravellyclayeySAND

Chalk

ClayeySAND

ClayeysandyGRAVEL

SandyclayeyGRAVEL

GravellyCLAY

GravellysiltyCLAY

SiltygravellyCLAY

GravellyCLAYwithCOBBLES

GravellySAND

GravellySILT

MADEGROUND SAND Sandy

CLAY

Sandy siltyCLAY

SandyGRAVEL

GravellysandyCLAY

SandygravellyCLAY

INSTRUMENTATION SYMBOLS

Backfill Bentoniteseal

Gravelfilter

Stopcockcover

Upstandingcover

Plain pipe Slottedpipe

(0.80)

0.80

(0.90)

1.70

(3.80)

5.50

(0.50)

6.00

1

2

3

4

0.50

1.00

2.00

5.50

69.54

68.64

64.84

64.34

B

B

B

B

Grass over firm orangish brown sandy slightly gravelly CLAY.Sand is fine to coarse, Gravel is medium subrounded chalk andflint.(SUPERFICIAL DEPOSITS)

Stiff orangish brown with frequent black specks sandy slightlygravelly CLAY with clayey sand pockets. Sand is fine tomedium. Gravel is fine to medium subrounded to subangularchalk.(LOWESTOFT TILL FORMATION). . . at 1.50m depth pocket of light grey very gravelly sand.

Sand is fine. Gravel is rounded chalk/organic matter.Orangish greyish brown clayey slightly gravelly SAND. Sand isfine to medium. Gravel is fine to medium subrounded chalk.(LOWESTOFT TILL FORMATION)

Stiff grey gravelly CLAY. Gravel is fine to coarse subroundedto subangular of chalk and flint.(LOWESTOFT TILL FORMATION)Borehole terminated at 6.00m depth.

1. Inspection pit dug to 1.20m depth.2. Hole remained stable.3. Groundwater seepage at 1.90m and groundwater

strike at 3.70m depth.4. Installation installed as requested.

Wat

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Boring Progress and Water Observations

TimeBorehole

DepthCasingDepth

BoreholeDiameter

(mm)

WaterDepth

From ToDuration(hh:mm)

General Remarks

All dimensions in metres Scale: 1:50

Date

Samples and In-situ Tests

Chiselling / Slow Progress

MaterialGraphicLegend

Client: Borehole:Contract:

Cole Green Lafarge Tarmac

BOREHOLE LOG

BH1

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MethodUsed:

PlantUsed:

DrilledBy:

LoggedBy:

CheckedBy:MSpencer-PhillipsCable percussion Dando 2000 JM

7.5.14

70.34 of

National Grid Co-ordinate:

7.5.14

Contract Ref: Start:

End:

Sheet:

561259 E:525982.2 N:211001.2 11Ground Level (m):

STRUCTURAL SOILS

(1.50)

1.50

(1.00)

2.50

(1.50)

4.00

1

2

3

0.50

1.50-1.70

3.00

58.99

57.99

56.49

B

B

B

Grass over firm friable orangish brown sandy slightly gravellyCLAY. Sand is fine to medium. Gravel is medium to coarsesubrounded to angular flint.(SUPERFICIAL DEPOSITS)

Stiff brown locally orangish brown sandy slightly gravellyCLAY. Sand is fine to medium. Gravel is fine to coarse angularto subrounded flint.(LOWESTOFT TILL FORMATION)

. . . at 2.30m depth cobble.Orangish brown very sandy slightly clayey GRAVEL. Sand ismedium to coarse. Gravel is fine to coarse subrounded toangular flint.(KESGRAVE CATCHMENT SUBGROUP)

Borehole terminated at 4.00m depth.

1. Inspection pit dug to 1.20m depth.2. Hole remained stable.3. No groundwater encountered. Water added at

3.50m depth.4. Installation installed as requested.

Wat

er

Results


educ

edL

evel


Bac

kfil

l &In

stru

-m

enta

tion


TimeBorehole

DepthCasingDepth

BoreholeDiameter

(mm)

WaterDepth


General Remarks


Date






BOREHOLE LOG

BH2

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

CA

BL

E P

ER

CU

SSI

ON

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

6 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

MethodUsed:

PlantUsed:

DrilledBy:

LoggedBy:


7.5.14

60.49 of


7.5.14


End:

Sheet:

561259 E:525856.9 N:210767.7 11Ground Level (m):

STRUCTURAL SOILS

08/01/1408/01/14

2.804.00

2.704.00

150150

50 blows100% recovery

(0.60)

0.60

(0.50)

1.10

(1.05)

2.15

(1.85)

4.00

1

2

3

45

6

0.50

1.00

1.50

2.102.15

2.50-3.00

62.55

62.05

61.00

59.15

B

B

U(UT100)

BB

B

2.802.80

MADE GROUND: Dark brown slightly silty gravelly SANDwith low cobble content. Sand is fine to coarse. Gravel is fineto coarse subrounded to subangular of brick and concrete.Cobbles are subrounded to angular.Soft orangish light brown sandy CLAY. Sand is fine tomedium.(LOWESTOFT TILL FORMATION)Stiff light brown slightly sandy CLAY. Sand is fine to medium.(LOWESTOFT TILL FORMATION)

Multicoloured (brown, orange, grey) very sandy GRAVEL.Sand is fine to coarse. Gravel is fine to medium rounded toangular of flint.(KESGRAVE CATCHMENT SUBGROUP)


1. Inspection pit dug to 1.20m depth.2. Hole remained stable.3. Groundwater strike at 2.60m depth.4. Installation installed as requested and hole

backfilled with gravel and bentonite.

Wat

er

Results


educ

edL

evel


Bac

kfil

l &In

stru

-m

enta

tion


TimeBorehole

DepthCasingDepth

BoreholeDiameter

(mm)

WaterDepth


General Remarks


Date






BOREHOLE LOG

BH3

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

CA

BL

E P

ER

CU

SSI

ON

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

6 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

MethodUsed:

PlantUsed:

DrilledBy:

LoggedBy:

CheckedBy:LMontgomeryCable percussion Dando 2000 HA

8.1.14

63.15 of


8.1.14


End:

Sheet:

561259 E:526095.5 N:210669.6 11Ground Level (m):

STRUCTURAL SOILS

07/01/1408/01/14

5.005.00

5.005.00

150150

0.45

0.70

1.00

(1.30)

2.30

(2.70)

5.00

1

2

3

4

0.50

1.50

2.50

3.40

59.76

59.51

59.21

57.91

55.21

B

B

B

B

2.802.00

Grass over MADE GROUND; Dark brown slightly siltygravelly SAND. Sand is fine to coarse. Gravel is fine tomedium subangular to angular of brick and flint.FILL recovered as black/dark grey slightly clayey very sandyGRAVEL. Sand is fine to coarse. Gravel is fine to coarserounded to angular of flint and brick. . . . layer of brick at 0.60 to 0.70m depth.MADE GROUND; Brown slightly gravelly SAND. Sand isfine to coarse. Gravel is fine to coarse subangular to angularbrick and flint.Soft mottled greyish orange slightly sandy CLAY withoccasional flint gravel. Sand is fine to coarse. Gravel is fine tomedium rounded to subangular flint.(LOWESTOFT TILL FORMATION)Multicoloured (brown, orange, grey) very sandy GRAVEL.Sand is fine to coarse. Gravel is fine to coarse rounded tosubangular flint.(KESGRAVE CATCHMENT SUBGROUP)


1. Inspection pit dug to 1.20m depth.2. Hydrogen sulphur odour at 0.70m depth.3. Hole remained stable.4. Groundwater seepage at 0.80m depth.5. Installation installed as requested and hole


Wat

er

Results


educ

edL

evel


Bac

kfil

l &In

stru

-m

enta

tion


TimeBorehole

DepthCasingDepth

BoreholeDiameter

(mm)

WaterDepth


General Remarks


Date






BOREHOLE LOG

BH4

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

CA

BL

E P

ER

CU

SSI

ON

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

6 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

MethodUsed:

PlantUsed:

DrilledBy:

LoggedBy:


7.1.14

60.21 of


7.1.14


End:

Sheet:

561259 E:526019.7 N:210559.9 11Ground Level (m):

STRUCTURAL SOILS

(0.80)

0.80

(0.90)

1.70

(3.50)

5.20

(0.80)

6.00

1

2

3

4

0.50

1.00

2.00

5.50

60.05

59.15

55.65

54.85

B

B

B

B

Grass over firm orangish brown sandy gravelly CLAY. Sand ismedium to coarse. gravel is fine to coarse subrounded to angularflint.(SUPERFICIAL DEPOSITS)

Orangish brown sandy clayey GRAVEL. Sand is medium tocoarse. Gravel is fine to coarse subrounded to angular flint.(KESGRAVE CATCHMENT SUBGROUP)

Orangish brown sandy slightly clayey GRAVEL. Sand iscoarse. Gravel is fine to coarse angular to rounded flint.(KESGRAVE CATCHMENT SUBGROUP)

White CHALK recovered as cream sandy slightly gravelly SILT.Sand is medium to coarse. Gravel is medium to coarse angularto subrounded flint.


1. Inspection pit dug to 1.20m depth.2. Hole unstable in gravel..3. No groundwater encountered. Water added at


Wat

er

Results


educ

edL

evel


Bac

kfil

l &In

stru

-m

enta

tion


TimeBorehole

DepthCasingDepth

BoreholeDiameter

(mm)

WaterDepth


General Remarks


Date






BOREHOLE LOG

BH5

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

CA

BL

E P

ER

CU

SSI

ON

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

6 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

MethodUsed:

PlantUsed:

DrilledBy:

LoggedBy:


8.5.14

60.85 of


8.5.14


End:

Sheet:

561259 E:526320.4 N:210245.6 11Ground Level (m):

STRUCTURAL SOILS

(0.80)

0.80

(4.50)

5.30

(4.70)

1

2

3

4

0.50

1.00

2.00

5.90

59.82

55.32

B

B

B

B

Friable brown sandy gravelly CLAY. Sand is medium. Gravelis medium subrounded to angular flint.(SUPERFICIAL DEPOSITS)

Orangish brown clayey sandy GRAVEL. Sand is medium tocoarse. Gravel is fine to coarse subrounded to angular flint.(KESGRAVE CATCHMENT SUBGROUP)

White CHALK recovered as cream white slightly sandy slightlygravelly SILT. Sand is medium. Gravel is fine to coarse angularto subangular flint.

1. Inspection pit dug to 1.20m depth.2. Hole unstable in gravel..3. No groundwater encountered. Water added at


Wat

er

Results


educ

edL

evel


Bac

kfil

l &In

stru

-m

enta

tion


TimeBorehole

DepthCasingDepth

BoreholeDiameter

(mm)

WaterDepth


General Remarks


Date






BOREHOLE LOG

BH6

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

CA

BL

E P

ER

CU

SSI

ON

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

6 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

MethodUsed:

PlantUsed:

DrilledBy:

LoggedBy:


14.5.14

60.62 of


14.5.14


End:

Sheet:

561259 E:526491.8 N:210280.9 21Ground Level (m):

STRUCTURAL SOILS

10.0050.62

White CHALK recovered as cream white slightly sandy slightlygravelly SILT. Sand is medium. Gravel is fine to coarse angularto subangular flint.(stratum copied from 5.30m from previous sheet)


Wat

er

Results


educ

edL

evel


Bac

kfil

l &In

stru

-m

enta

tion


TimeBorehole

DepthCasingDepth

BoreholeDiameter

(mm)

WaterDepth


General Remarks


Date






BOREHOLE LOG

BH6

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

CA

BL

E P

ER

CU

SSI

ON

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

6 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

MethodUsed:

PlantUsed:

DrilledBy:

LoggedBy:


14.5.14

60.62 of


14.5.14


End:

Sheet:

561259 E:526491.8 N:210280.9 22Ground Level (m):

STRUCTURAL SOILS

cu=175/175/150

(0.80)

0.80

(0.80)

1.60

(1.40)

3.00

(0.80)

3.80

(3.70)

7.50

(0.50)

8.00

(0.60)

8.60

1

2

3

4

5

6

0.50

1.00

2.00

3.50

4.004.00

7.80

62.21

61.41

60.01

59.21

55.51

55.01

54.41

B

B

B

B

BHP

B

Stiff orangish brown sandy slightly gravelly CLAY with fewrootlets. Sand is fine to medium. Gravel is fine to coarseangular to subrounded flint.(SUPERFICIAL DEPOSITS)

Stiff orangish brown sandy slightly gravelly CLAY with fewrootlets and 20-40mm sand pockets. Sand is fine to coarse.Gravel is medium to coarse rounded to subangular flint.(SUPERFICIAL DEPOSITS)

Yellowish brown gravelly SAND with rare pockets of verysandy clay. Sand is medium to coarse. Gravel is medium tocoarse subrounded to angular flint.(SUPERFICIAL DEPOSITS)

Stiff brown gravelly CLAY. Gravel is fine to mediumsubrounded to subangular chalk, flint, igneous rock and mica.(SUPERFICIAL DEPOSITS)

Stiff dark grey gravelly CLAY. Gravel is fine subrounded tosubangular chalk, flint, igneous rock and mica.(LOWESTOFT TILL FORMATION)

Hard orangish brown slightly sandy gravelly CLAY with sandyclay pockets. Sand is fine to medium. Gravel is fine to coarserounded to angular of mixed lithologies including chalk, flintand igneous rock.(LOWESTOFT TILL FORMATION)Yellowish brown slightly gravelly SAND. Sand is medium.Gravel is medium to coarse subrounded to subangular flint.(KESGRAVE CATCHMENT SUBGROUP)Borehole terminated at 8.60m depth.

1. Inspection pit dug to 1.20m depth.2. Hole unstable from 8.00m depth.3. No groundwater encountered. Water added at


Wat

er

Results


educ

edL

evel


Bac

kfil

l &In

stru

-m

enta

tion


TimeBorehole

DepthCasingDepth

BoreholeDiameter

(mm)

WaterDepth


General Remarks


Date






BOREHOLE LOG

BH7

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

CA

BL

E P

ER

CU

SSI

ON

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

6 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

MethodUsed:

PlantUsed:

DrilledBy:

LoggedBy:


9.5.14

63.01 of


9.5.14


End:

Sheet:

561259 E:526918.8 N:210293.4 21Ground Level (m):

STRUCTURAL SOILS

Wat

er

Results


educ

edL

evel


Bac

kfil

l &In

stru

-m

enta

tion


TimeBorehole

DepthCasingDepth

BoreholeDiameter

(mm)

WaterDepth


General Remarks


Date






BOREHOLE LOG

BH7

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

CA

BL

E P

ER

CU

SSI

ON

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

6 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

MethodUsed:

PlantUsed:

DrilledBy:

LoggedBy:


9.5.14

63.01 of


9.5.14


End:

Sheet:

561259 E:526918.8 N:210293.4 22Ground Level (m):

STRUCTURAL SOILS

(1.80)

1.80

(2.70)

4.50

(1.00)

5.50

1

2

3

4

5

0.50

1.00

2.00

2.50

4.50

64.92

62.22

61.22

B

B

B

B

B

Firm orangish brown slightly sandy slightly gravelly CLAY withrare rootlets. Sand is medium. Gravel is fine to mediumsubrounded to subangular chalk, calcite nodules and flint.(SUPERFICIAL DEPOSITS)

Stiff grey silty slightly gravelly CLAY. Gravel is mediumsubrounded to rounded chalk.(LOWESTOFT TILL FORMATION). . . at 2.00m depth becomes stiff and orangish brown mottled

grey.

. . . at 4.30m depth lens of grey clayey silt.Very stiff grey slightly sandy gravelly CLAY. Sand is medium.Gravel is fine to coarse subrounded to angular chalk, flint andigneous rock.(LOWESTOFT TILL FORMATION)


1. Inspection pit dug to 1.20m depth.2. Hole remained stable.3. Groundwater seepage at 2.50m and groundwater

strike at 4.00m depth.4. Installation installed as requested.

Wat

er

Results


educ

edL

evel


Bac

kfil

l &In

stru

-m

enta

tion


TimeBorehole

DepthCasingDepth

BoreholeDiameter

(mm)

WaterDepth


General Remarks


Date






BOREHOLE LOG

BH9

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

CA

BL

E P

ER

CU

SSI

ON

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

6 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

MethodUsed:

PlantUsed:

DrilledBy:

LoggedBy:


15.5.14

66.72 of


15.5.14


End:

Sheet:

561259 E:527028.6 N:210427.0 11Ground Level (m):

STRUCTURAL SOILS

(0.80)

0.80

(5.20)

6.00

(3.20)

1

2

3

0.50

1.00

2.00

73.87

68.67

B

B

B

Brown very clayey slightly gravelly SAND. Sand is medium.Gravel is fine to medium subangular to rounded chalk and flint.(KESGRAVE CATCHMENT SUBGROUP)

Orangish brown clayey slightly gravelly SAND with pockets ofvery sandy clay. Sand is medium. Gravel is angular tosubrounded flint.(LOWESTOFT TILL FORMATION)

Brownish orange medium SAND.(LOWESTOFT TILL FORMATION)

1. Inspection pit dug to 1.20m depth.2. Hole unstable in sand..3. Groundwater encountered at 4.00m depth.4. Installation installed as requested.

Wat

er

Results


educ

edL

evel


Bac

kfil

l &In

stru

-m

enta

tion


TimeBorehole

DepthCasingDepth

BoreholeDiameter

(mm)

WaterDepth


General Remarks


Date






BOREHOLE LOG

BH10

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

CA

BL

E P

ER

CU

SSI

ON

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

6 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

MethodUsed:

PlantUsed:

DrilledBy:

LoggedBy:


9.5.14

74.67 of


9.5.14


End:

Sheet:

561259 E:527099.9 N:210606.8 21Ground Level (m):

STRUCTURAL SOILS

9.20

(0.80)

10.00

49.50

65.47

64.67

B

Very stiff grey slightly sandy gravelly CLAY. Sand is mediumto coarse. Gravel is fine to medium angular to subrounded flintchalk.(LOWESTOFT TILL FORMATION)


Wat

er

Results


educ

edL

evel


Bac

kfil

l &In

stru

-m

enta

tion


TimeBorehole

DepthCasingDepth

BoreholeDiameter

(mm)

WaterDepth


General Remarks


Date






BOREHOLE LOG

BH10

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

CA

BL

E P

ER

CU

SSI

ON

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

6 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

MethodUsed:

PlantUsed:

DrilledBy:

LoggedBy:


9.5.14

74.67 of


9.5.14


End:

Sheet:

561259 E:527099.9 N:210606.8 22Ground Level (m):

STRUCTURAL SOILS

cu=150/150/175

(1.80)

1.80

(0.90)

2.70

(3.10)

5.80

(0.70)

6.50

1

2

3

4

5

0.50

1.00

2.00

5.00

6.006.00

66.96

66.06

62.96

62.26

B

B

B

B

BHP

Firm orangish brown locally brown very sandy CLAY. Sand isfine.(SUPERFICIAL DEPOSITS)

. . . at 1.00m depth slightly gravelly. Gravel are fine to mediumsubrounded to subangular flint.

Stiff orangish brown locally greyish brown sandy CLAY. Sandis fine to medium.(SUPERFICIAL DEPOSITS)

Stiff grey locally orangish brown sandy silty CLAY. Sand isfine.(SUPERFICIAL DEPOSITS)

Very stiff grey slightly sandy gravelly CLAY. Sand is fine.Gravel is fine rounded to subangular chalk and flint.(LOWESTOFT TILL FORMATION)


1. Inspection pit dug to 1.20m depth.2. Hole remained stable.3. Groundwater seepage encountered at 4.80m

depth.4. Installation installed as requested.

Wat

er

Results


educ

edL

evel


Bac

kfil

l &In

stru

-m

enta

tion


TimeBorehole

DepthCasingDepth

BoreholeDiameter

(mm)

WaterDepth


General Remarks


Date






BOREHOLE LOG

BH11

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

CA

BL

E P

ER

CU

SSI

ON

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

6 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

MethodUsed:

PlantUsed:

DrilledBy:

LoggedBy:


12.5.14

68.76 of


12.5.14


End:

Sheet:

561259 E:526843.7 N:210464.2 11Ground Level (m):

STRUCTURAL SOILS

(1.00)

1.00

(2.70)

3.70

(3.60)

7.307.50

1

2

3

4

5

6

0.50

1.00

2.00

2.50

5.00

7.40

75.07

72.37

68.7768.57

B

B

B

B

B

B

Stiff orangish brown gravelly CLAY. Gravel is fine to coarseangular to subrounded flint and calcite nodules.(SUPERFICIAL DEPOSITS)

Very stiff mottled orangish brown brown grey gravelly CLAY.Gravel is fine to coarse angular to rounded chalk and flint.(LOWESTOFT TILL FORMATION) . . . at 1.50m depth becomes hard clay.

Hard grey gravelly CLAY with a low cobble content. Gravel isfine to coarse subangular to rounded chalk and flint. Cobbles upto 300mm.(LOWESTOFT TILL FORMATION)

Stiff orangish brown sandy gravelly CLAY. Sand is fine tomedium. Gravel is fine to medium subrounded to subangularchalk.(LOWESTOFT TILL FORMATION)Borehole terminated at 7.50m depth.

1. Inspection pit dug to 1.20m depth.2. Hole unstable from 7.00m depth.3. Groundwater strike at 7.50m depth rose to

5.20m depth. Blow back up to 7.10m depth.4. Installation installed as requested.

Wat

er

Results


educ

edL

evel


Bac

kfil

l &In

stru

-m

enta

tion


TimeBorehole

DepthCasingDepth

BoreholeDiameter

(mm)

WaterDepth


General Remarks


Date






BOREHOLE LOG

BH12

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

CA

BL

E P

ER

CU

SSI

ON

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

6 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

MethodUsed:

PlantUsed:

DrilledBy:

LoggedBy:


14.5.14

76.07 of


14.5.14


End:

Sheet:

561259 E:526868.1 N:210629.6 11Ground Level (m):

STRUCTURAL SOILS

(2.50)

2.50

(3.20)

5.70

6.00

(3.80)

1

2

3

4

5

6

7

0.50

1.00

2.00

3.00

4.00

5.70

7.00

71.84

68.64

68.34

B

B

B

B

B

B

B

Firm orangish brown slightly sandy slightly gravelly CLAY.Sand is medium. gravel is fine to coarse subangular tosubrounded flint.(SUPERFICIAL DEPOSITS)

. . . at 2.00m depth becomes faintly fissured.

Very stiff mottled brownish grey orangish brown gravellyCLAY. Gravel is fine to coarse subangular to rounded chalk.(LOWESTOFT TILL FORMATION)

. . . at 4.00m becoming very hard.

Very stiff yellowish brown sandy gravelly CLAY with clayeysand pockets. Sand is medium. Gravel is fine to coarsesubangular to subrounded chalk and clayey flint. Sand pocketsare 25-50mm.(LOWESTOFT TILL FORMATION)Brownish orange gravelly SAND. Sand is medium to coarse.Gravel is fine to medium subrounded to subangular chalk.(KESGRAVE CATCHMENT SUBGROUP)

1. Inspection pit dug to 1.20m depth.2. Borehole unstable.3. Groundwater strike at 4.70m depth. Blow back

up to 4.30m depth.4. Installation installed as requested.

Wat

er

Results


educ

edL

evel


Bac

kfil

l &In

stru

-m

enta

tion


TimeBorehole

DepthCasingDepth

BoreholeDiameter

(mm)

WaterDepth


General Remarks


Date






BOREHOLE LOG

BH13

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

CA

BL

E P

ER

CU

SSI

ON

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

6 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

MethodUsed:

PlantUsed:

DrilledBy:

LoggedBy:


14.5.14

74.34 of


14.5.14


End:

Sheet:

561259 E:526787.0 N:210771.3 21Ground Level (m):

STRUCTURAL SOILS

9.8064.54

Brownish orange gravelly SAND. Sand is medium to coarse.Gravel is fine to medium subrounded to subangular chalk.(KESGRAVE CATCHMENT SUBGROUP)(stratum copied from 6.00m from previous sheet)

Borehole terminated at 9.80m depth.W

ater

Results


educ

edL

evel


Bac

kfil

l &In

stru

-m

enta

tion


TimeBorehole

DepthCasingDepth

BoreholeDiameter

(mm)

WaterDepth


General Remarks


Date






BOREHOLE LOG

BH13

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

CA

BL

E P

ER

CU

SSI

ON

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

6 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

MethodUsed:

PlantUsed:

DrilledBy:

LoggedBy:


14.5.14

74.34 of


14.5.14


End:

Sheet:

561259 E:526787.0 N:210771.3 22Ground Level (m):

STRUCTURAL SOILS

(0.90)

0.90

(1.60)

2.50

(2.50)

5.005.20

1

2

3

4

5

0.50

1.00

2.00

3.00

5.20

69.36

67.76

65.2665.06

B

B

B

B

B

Firm orangish brown slightly sandy slightly gravelly CLAY withrootlets. Gravel is fine to coarse subrounded to angular flint.(SUPERFICIAL DEPOSITS)

Stiff orangish brown mottled grey and brown slightly sandyslightly gravelly CLAY. Sand is medium. Gravel is fine tocoarse angular to subrounded flint and chalk.(LOWESTOFT TILL FORMATION)

. . . at 2.00m depth cobble of flint up to 300mm.

Brownish yellow slightly gravelly SAND. Sand is coarse.Gravel is fine to coarse angular to subrounded chalk and flint.(LOWESTOFT TILL FORMATION)

Stiff grey slightly gravelly CLAY. Gravel is fine to mediumangular to rounded flint, igneous rock and chalk.(LOWESTOFT TILL FORMATION)Borehole terminated at 5.20m depth.

1. Inspection pit dug to 1.20m depth.2. Hole remained stable.3. Groundwater strike at 2.50m depth rose to


Wat

er

Results


educ

edL

evel


Bac

kfil

l &In

stru

-m

enta

tion


TimeBorehole

DepthCasingDepth

BoreholeDiameter

(mm)

WaterDepth


General Remarks


Date






BOREHOLE LOG

BH14

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

CA

BL

E P

ER

CU

SSI

ON

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

6 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

MethodUsed:

PlantUsed:

DrilledBy:

LoggedBy:


13.5.14

70.26 of


13.5.14


End:

Sheet:

561259 E:526602.4 N:210613.4 11Ground Level (m):

STRUCTURAL SOILS

cu=75/75/68

cu=87/87/10 (2.50)

2.50

(2.20)

4.70

5.00

(5.00)

1

2

3

4

5

6

0.500.50

1.001.00

2.00

2.50

4.90

5.10

63.12

60.92

60.62

BHP

BHP

B

B

B

B

Firm light brown mottled grey and brown gravelly CLAY withfew rootlets. Gravel is fine to medium angular to subroundedflint and chalk.(SUPERFICIAL DEPOSITS)

. . . at 1.00m depth becomes very stiff.

Very stiff grey mottled brown gravelly CLAY. Gravel is fine tocoarse rounded to angular flint, chalk and igneous rock.(LOWESTOFT TILL FORMATION)

Hard light brown mottled grey gravelly CLAY. Gravel is fine tocoarse rounded to angular flint, chalk and igneous rock.(LOWESTOFT TILL FORMATION)Orangish brown slightly clayey gravelly SAND. Sand is coarse.Gravel is fine to coarse subrounded to angular flint.(LOWESTOFT TILL FORMATION)

1. Inspection pit dug to 1.20m depth.2. Hole unstable in sand.3. No water encountered. Water added at 5.10m

depth.4. Cased to 10.00m depth.5. Installation installed as requested.

Wat

er

Results


educ

edL

evel


Bac

kfil

l &In

stru

-m

enta

tion


TimeBorehole

DepthCasingDepth

BoreholeDiameter

(mm)

WaterDepth


General Remarks


Date






BOREHOLE LOG

BH15

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

CA

BL

E P

ER

CU

SSI

ON

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

6 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

MethodUsed:

PlantUsed:

DrilledBy:

LoggedBy:


13.5.14

65.62 of


13.5.14


End:

Sheet:

561259 E:526561.6 N:210511.7 21Ground Level (m):

STRUCTURAL SOILS

10.0055.62

Orangish brown slightly clayey gravelly SAND. Sand is coarse.Gravel is fine to coarse subrounded to angular flint.(LOWESTOFT TILL FORMATION)(stratum copied from 5.00m from previous sheet)


Wat

er

Results


educ

edL

evel


Bac

kfil

l &In

stru

-m

enta

tion


TimeBorehole

DepthCasingDepth

BoreholeDiameter

(mm)

WaterDepth


General Remarks


Date






BOREHOLE LOG

BH15

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

CA

BL

E P

ER

CU

SSI

ON

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

6 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

MethodUsed:

PlantUsed:

DrilledBy:

LoggedBy:


13.5.14

65.62 of


13.5.14


End:

Sheet:

561259 E:526561.6 N:210511.7 22Ground Level (m):

STRUCTURAL SOILS

0.050.35

(0.95)

1.30

(2.50)

3.80

(6.20)

1

2

3

4

0.50

1.50

2.50

3.80

71.2870.98

70.03

67.53

B

B

B

B

Grass over TOPSOIL: Slightly sandy SILT. Sand is fine tocoarse.Orangish light brown slightly gravelly slightly silty SAND.Sand is fine to coarse. Gravel is fine to medium subrounded toangular.(LOWESTOFT TILL FORMATION)Firm light brown/grey slightly gravelly slightly sandy CLAY.Sand is fine to coarse. Gravel is fine to medium.(LOWESTOFT TILL FORMATION)Orange/light brown slightly gravelly SAND. Sand is fine tomedium. Gravel is fine to coarse subrounded to angular.(LOWESTOFT TILL FORMATION)

Stiff dark grey slightly gravelly CLAY. Gravel is fine to mediumsubrounded to angular of chalk.(LOWESTOFT TILL FORMATION)



Wat

er

Results


educ

edL

evel


Bac

kfil

l &In

stru

-m

enta

tion


TimeBorehole

DepthCasingDepth

BoreholeDiameter

(mm)

WaterDepth


General Remarks


Date






BOREHOLE LOG

BH16

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

CA

BL

E P

ER

CU

SSI

ON

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

6 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

MethodUsed:

PlantUsed:

DrilledBy:

LoggedBy:

CheckedBy:LMontgomeryCable percussion Dando 2000 CR

9.1.14

71.33 of


9.1.14


End:

Sheet:

561259 E:526436.9 N:210610.4 21Ground Level (m):

STRUCTURAL SOILS

10.0061.33

Stiff dark grey slightly gravelly CLAY. Gravel is fine to mediumsubrounded to angular of chalk.(LOWESTOFT TILL FORMATION)(stratum copied from 3.80m from previous sheet)


Wat

er

Results


educ

edL

evel


Bac

kfil

l &In

stru

-m

enta

tion


TimeBorehole

DepthCasingDepth

BoreholeDiameter

(mm)

WaterDepth


General Remarks


Date






BOREHOLE LOG

BH16

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

CA

BL

E P

ER

CU

SSI

ON

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

6 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

MethodUsed:

PlantUsed:

DrilledBy:

LoggedBy:


9.1.14

71.33 of


9.1.14


End:

Sheet:

561259 E:526436.9 N:210610.4 22Ground Level (m):

STRUCTURAL SOILS

cu=38/38/25

cu=125/125/125

70 blows

(0.50)

0.50

(1.10)

1.60

(1.00)

2.60

2.90

(3.10)

6.00

1

2

3

4

5

6

0.50

1.00

2.00

2.502.60

3.003.00

4.00

66.32

65.22

64.22

63.92

60.82

B

B

B

BHP

BHP

U

Grass over firm orangish brown sandy slightly gravelly CLAY.Sand is fine to medium. Gravel is fine to coarse angular tosubrounded flint.(SUPERFICIAL DEPOSITS)Stiff orangish brown very sandy slightly gravelly CLAY withrare rootlets. Sand is fine to medium. Gravel is medium tocoarse angular to subrounded flint.(LOWESTOFT TILL FORMATION)

Orangish brown clayey slightly gravelly SAND. Sand is fine tomedium. Gravel is fine to coarse angular to subangular flint.(LOWESTOFT TILL FORMATION)

Firm locally soft orangish brown locally greyish brown slightlysandy gravelly CLAY. Sand is medium. Gravel is fine tomedium subrounded chalk and flint.(LOWESTOFT TILL FORMATION)Very stiff grey slightly sandy slightly gravelly CLAY. Sand ismedium to coarse. Gravel is fine to medium angular tosubrounded flint and chalk.(LOWESTOFT TILL FORMATION)


1. Inspection pit dug to 1.20m depth.2. Hole remained stable.3. Groundwater strike at 1.70m depth and rose to


Wat

er

Results


educ

edL

evel


Bac

kfil

l &In

stru

-m

enta

tion


TimeBorehole

DepthCasingDepth

BoreholeDiameter

(mm)

WaterDepth


General Remarks


Date






BOREHOLE LOG

BH17

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

CA

BL

E P

ER

CU

SSI

ON

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

6 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

MethodUsed:

PlantUsed:

DrilledBy:

LoggedBy:


7.5.14

66.82 of


7.5.14


End:

Sheet:

561259 E:526359.6 N:210465.5 11Ground Level (m):

STRUCTURAL SOILS

0.10

(1.40)

1.50

(5.00)

6.50

(2.00)

8.50

8.80

1

2

3

4

0.50

1.50

2.50

6.50

73.86

72.46

67.46

65.46

65.16

B

B

B

B

Grass over TOPSOIL: Brown/dark brown slightly sandy SILT.Sand is fine to coarse.MADE GROUND: Dark brown slightly gravelly slightly siltySAND with low cobble content. Sand is fine to coarse. Gravelis fine to medium subrounded to angular of brick. Cobbles aresubrounded to angular of brick and concrete.

Orangish brown slightly silty SAND. Sand is fine to coarse.(LOWESTOFT TILL FORMATION)

. . . becoming clayey from 5.00m depth.

Light grey very clayey SAND with infrequent pockets/bands ofgrey clay. Sand is fine to medium.(LOWESTOFT TILL FORMATION)

Firm dark grey slightly sandy CLAY. Sand is fine to medium.(LOWESTOFT TILL FORMATION)

1. Inspection pit dug to 1.20m depth.2. Hole remained stable.3. Groundwater seepage at between 3.00 and

8.50m depth.4. Installation installed as requested and hole


Wat

er

Results


educ

edL

evel


Bac

kfil

l &In

stru

-m

enta

tion


TimeBorehole

DepthCasingDepth

BoreholeDiameter

(mm)

WaterDepth


General Remarks


Date






BOREHOLE LOG

BH18

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

CA

BL

E P

ER

CU

SSI

ON

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

6 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

MethodUsed:

PlantUsed:

DrilledBy:

LoggedBy:


9.1.14

73.96 of


9.1.14


End:

Sheet:

561259 E:526407.8 N:210746.5 21Ground Level (m):

STRUCTURAL SOILS

(1.20)

10.0063.96

Description on next sheet

Stiff dark grey slightly gravelly CLAY. Gravel is fine to mediumsubrounded to angular of chalk and flint.(LOWESTOFT TILL FORMATION)(stratum copied from 8.80m from previous sheet)

Wat

er

Results


educ

edL

evel


Bac

kfil

l &In

stru

-m

enta

tion


TimeBorehole

DepthCasingDepth

BoreholeDiameter

(mm)

WaterDepth


General Remarks


Date






BOREHOLE LOG

BH18

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

CA

BL

E P

ER

CU

SSI

ON

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

6 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

MethodUsed:

PlantUsed:

DrilledBy:

LoggedBy:


9.1.14

73.96 of


9.1.14


End:

Sheet:

561259 E:526407.8 N:210746.5 22Ground Level (m):

STRUCTURAL SOILS

09/01/1409/01/14

2.007.50

2.004.00

150150

0.05

(1.85)

1.90

(2.10)

4.00

(3.50)

7.50

1

2

3

4

0.50

1.00

2.00

4.00

68.50

66.65

64.55

61.05

B

B

B

B

2.00 Dry

Grass over TOPSOIL: Dark brown slightly sandy SILT.Sand isfine to coarse.Soft to firm brown slightly sandy CLAY. Sand is fine to coarse.(LOWESTOFT TILL FORMATION)

Multicoloured (brown, grey, orange) very gravelly SAND. Sandis fine to coarse. Gravel is fine to medium subrounded tosubangular.(LOWESTOFT TILL FORMATION)

Stiff dark grey slightly sandy CLAY. Sand is fine to medium.(LOWESTOFT TILL FORMATION)




Wat

er

Results


educ

edL

evel


Bac

kfil

l &In

stru

-m

enta

tion


TimeBorehole

DepthCasingDepth

BoreholeDiameter

(mm)

WaterDepth


General Remarks


Date






BOREHOLE LOG

BH19

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

CA

BL

E P

ER

CU

SSI

ON

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

6 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

MethodUsed:

PlantUsed:

DrilledBy:

LoggedBy:


9.1.14

68.55 of


9.1.14


End:

Sheet:

561259 E:526218.3 N:210776.2 11Ground Level (m):

STRUCTURAL SOILS

10/01/14 0.30 - 150

(1.50)

1.50

(1.00)

2.50

(0.50)

3.00

1

2

3

0.50

1.50

2.50

69.85

68.85

68.35

B

B

B

0.30

Dead twigs/shoots over MADE GROUND: Soft to firm slightlygravelly slightly sandy CLAY. Sand is fine to medium. Gravelis fine to coarse rounded to angular of concrete and brick.

Stiff dark grey mottled brown slightly gravelly CLAY. Gravel ischalk and flint.(LOWESTOFT TILL FORMATION)

Stiff grey slightly gravelly CLAY. Gravel is fine to mediumsubrounded to angular of chalk and flint.(LOWESTOFT TILL FORMATION)Borehole terminated at 3.00m depth.



Wat

er

Results


educ

edL

evel


Bac

kfil

l &In

stru

-m

enta

tion


TimeBorehole

DepthCasingDepth

BoreholeDiameter

(mm)

WaterDepth


General Remarks


Date






BOREHOLE LOG

BH20

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

CA

BL

E P

ER

CU

SSI

ON

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

6 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

MethodUsed:

PlantUsed:

DrilledBy:

LoggedBy:


10.1.14

71.35 of


10.1.14


End:

Sheet:

561259 E:526378.2 N:210898.1 11Ground Level (m):

STRUCTURAL SOILS

08/01/14 0.50 - 150

0.300.50

(3.10)

3.60

(5.40)

9.00

1

2

3

4

0.50

1.50

2.50

3.60

62.5962.39

59.29

53.89

B

B

B

B

0.50

Grass over MADE GROUND: Brown/light brown slightlygravelly slightly SAND with low cobble content. Sand is fine tocoarse. Gravel is fine to coarse subrounded to angular of brick.Cobbles are subrounded to subangular of brick.MADE GROUND: Brown slightly silty SAND. Sand is fine tocoarse.Multicoloured (brown, grey, orange) slightly gravelly SAND.Sand is fine to medium. Gravel is fine to medium rounded tosubangular.(LOWESTOFT TILL FORMATION)

Stiff dark grey slightly gravelly CLAY. Gravel is fine tomedium subrounded to angular of chalk and flint.(LOWESTOFT TILL FORMATION)

1. Inspection pit dug to 1.20m depth.2. Hole remained stable.3. Groundwater seepage at 0.50m depth.4. Installation installed and hole backfilled with

gravel and bentonite.

Wat

er

Results


educ

edL

evel


Bac

kfil

l &In

stru

-m

enta

tion


TimeBorehole

DepthCasingDepth

BoreholeDiameter

(mm)

WaterDepth


General Remarks


Date






BOREHOLE LOG

BH21

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

CA

BL

E P

ER

CU

SSI

ON

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

6 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

MethodUsed:

PlantUsed:

DrilledBy:

LoggedBy:


8.1.14

62.89 of


8.1.14


End:

Sheet:

561259 E:526306.4 N:210968.0 21Ground Level (m):

STRUCTURAL SOILS

(1.00)

10.00

59.00

52.89

B Multicoloured (brown, grey, orange) very gravelly SAND. Sandis fine to coarse. Gravel is fine to coarse rounded to angular.(KESGRAVE CATCHMENT SUBGROUP)


Wat

er

Results


educ

edL

evel


Bac

kfil

l &In

stru

-m

enta

tion


TimeBorehole

DepthCasingDepth

BoreholeDiameter

(mm)

WaterDepth


General Remarks


Date






BOREHOLE LOG

BH21

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

CA

BL

E P

ER

CU

SSI

ON

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

6 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

MethodUsed:

PlantUsed:

DrilledBy:

LoggedBy:


8.1.14

62.89 of


8.1.14


End:

Sheet:

561259 E:526306.4 N:210968.0 22Ground Level (m):

STRUCTURAL SOILS

08/01/1408/01/14

2.4010.00

2.204.50

150150

(2.10)

2.10

(2.00)

4.10

(4.90)

9.00

1

2

3

0.50

2.30

4.10

66.04

64.04

59.14

B

B

B

2.40 -

Grass over MADE GROUND: Dark brown slightly gravellyslightly sandy SILT with low cobble content. Sand is fine tocoarse. Gravel is fine to coarse subrounded to angular of brickand plastic. Cobbles are subrounded to angular of brick.

Light grey slightly gravelly clayey SAND. Sand is fine tomedium.(LOWESTOFT TILL FORMATION)

Firm light grey slightly sandy CLAY. Sand is fine to medium.(LOWESTOFT TILL FORMATION)


backfilled with arisings, gravel and bentonite.

Wat

er

Results


educ

edL

evel


Bac

kfil

l &In

stru

-m

enta

tion


TimeBorehole

DepthCasingDepth

BoreholeDiameter

(mm)

WaterDepth


General Remarks


Date






BOREHOLE LOG

BH22

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

CA

BL

E P

ER

CU

SSI

ON

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

6 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

MethodUsed:

PlantUsed:

DrilledBy:

LoggedBy:


9.1.14

68.14 of


9.1.14


End:

Sheet:

561259 E:526206.9 N:210895.4 21Ground Level (m):

STRUCTURAL SOILS

(1.00)

10.00

49.20

58.14

BBrownish light grey sandy CLAY. Sand is fine to coarse.(LOWESTOFT TILL FORMATION)


Wat

er

Results


educ

edL

evel


Bac

kfil

l &In

stru

-m

enta

tion


TimeBorehole

DepthCasingDepth

BoreholeDiameter

(mm)

WaterDepth


General Remarks


Date






BOREHOLE LOG

BH22

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

CA

BL

E P

ER

CU

SSI

ON

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

6 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

MethodUsed:

PlantUsed:

DrilledBy:

LoggedBy:


9.1.14

68.14 of


9.1.14


End:

Sheet:

561259 E:526206.9 N:210895.4 22Ground Level (m):

STRUCTURAL SOILS

09/01/1410/01/14

9.8010.50

9.8010.50

150150

(0.60)

0.60

(0.60)

1.20

(2.10)

3.30

(2.20)

5.50

(4.30)

1

2

3

4

5

0.50

1.00

2.00

3.30

5.50

68.71

68.11

66.01

63.81

B

B

B

B

B

Dry6.20

Grass over MADE GROUND: Soft brownish orange slightlysandy slightly gravelly CLAY with low cobble content. Sand isfine to coarse. Gravel is fine to coarse rounded to angular offlint. Cobbles are rounded to subangular of flint.Light brown slightly sandy GRAVEL. Sand is fine to coarse.Gravel is fine to medium subrounded to subangular.(LOWESTOFT TILL FORMATION)Stiff grey/dark grey CLAY with occasional pockets of sand.Sand is fine to coarse.(LOWESTOFT TILL FORMATION)

Brown slightly gravelly SAND. Sand is fine to coarse. Gravel isfine to medium subrounded to angular.(LOWESTOFT TILL FORMATION)

Stiff dark grey slightly gravelly CLAY. Gravel is fine to mediumsubrounded to angular of flint and chalk.(LOWESTOFT TILL FORMATION)

1. Inspection pit dug to 1.20m depth.2. Hole remained stable.3. No groundwater encountered.4. Installation installed as requested and hole


Wat

er

Results


educ

edL

evel


Bac

kfil

l &In

stru

-m

enta

tion


TimeBorehole

DepthCasingDepth

BoreholeDiameter

(mm)

WaterDepth


General Remarks


Date






BOREHOLE LOG

BH23

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

CA

BL

E P

ER

CU

SSI

ON

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

6 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

MethodUsed:

PlantUsed:

DrilledBy:

LoggedBy:


9.1.14

69.31 of


10.1.14


End:

Sheet:

561259 E:526298.2 N:211115.8 21Ground Level (m):

STRUCTURAL SOILS

9.80

(0.70)

10.50

6

7

9.60

9.8059.51

58.81

B

B

Stiff dark grey slightly gravelly CLAY. Gravel is fine to mediumsubrounded to angular of flint and chalk.(LOWESTOFT TILL FORMATION)(stratum copied from 5.50m from previous sheet)

Brown/dark brown very gravelly SAND. Sand is fine to coarse.Gravel is fine to coarse subrounded to subangular flint.(KESGRAVE CATCHMENT SUBGROUP)


Wat

er

Results


educ

edL

evel


Bac

kfil

l &In

stru

-m

enta

tion


TimeBorehole

DepthCasingDepth

BoreholeDiameter

(mm)

WaterDepth


General Remarks


Date






BOREHOLE LOG

BH23

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

CA

BL

E P

ER

CU

SSI

ON

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

6 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

MethodUsed:

PlantUsed:

DrilledBy:

LoggedBy:


9.1.14

69.31 of


10.1.14


End:

Sheet:

561259 E:526298.2 N:211115.8 22Ground Level (m):

STRUCTURAL SOILS

cu=38/38/50

(0.90)

0.90

(1.00)

1.90

(2.90)

4.80

(2.20)

7.00

1

2

3

4

0.50

0.80

1.00

2.00

4.00

71.68

70.68

67.78

65.58

B

HP

B

B

B

Grass over firm orangish brown very sandy slightly gravellyCLAY. Sand is fine to medium. Gravel is coarse angular flint.(SUPERFICIAL DEPOSITS)

Stiff orangish brown slightly sandy CLAY. Sand is fine.(SUPERFICIAL DEPOSITS)

Firm yellow brown very sandy CLAY with very clayey sandpockets. Sand is fine.(SUPERFICIAL DEPOSITS)

Firm yellowish brown very sandy gravelly CLAY. Gravel isfine to coarse rounded to subangular chalk.(LOWESTOFT TILL FORMATION)


1. Inspection pit dug to 1.20m depth.2. Hole remained stable.3. Groundwater seepage at 4.70m depth and

groundwater strike at 5.70m depth.4. Installation installed as requested.

Wat

er

Results


educ

edL

evel


Bac

kfil

l &In

stru

-m

enta

tion


TimeBorehole

DepthCasingDepth

BoreholeDiameter

(mm)

WaterDepth


General Remarks


Date






BOREHOLE LOG

BH24

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

CA

BL

E P

ER

CU

SSI

ON

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

6 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

MethodUsed:

PlantUsed:

DrilledBy:

LoggedBy:


6.5.14

72.58 of


6.5.14


End:

Sheet:

561259 E:526104.3 N:211283.2 11Ground Level (m):

STRUCTURAL SOILS

1. Sides mostly stable. Slight collapse between 2.22 and 4.50m depth.2. Slight seepage at 4.50m depth.3. Hole backfilled with arisings in reverse order.

71.54

69.62

68.74

67.34

1

2

3

4

B

B

B

B

(0.30)

0.30

(1.92)

2.22

(0.88)

3.10

(1.40)

4.50

0.00-0.30

0.30-2.22

2.22-3.10

3.10-4.50

Cropped dark brown slightly gravelly sandy SILT. Gravel isangular to well rounded fine to coarse of flint. PloughedTopsoil.

Firm reddish brown sandy CLAY.(SUPERFICIAL DEPOSITS)

Orange clayey gravelly SAND. Gravel is angular to subroundedfine to coarse of flint.(SUPERFICIAL DEPOSITS)

Light orange brown spotted black and brown clayey SAND andGRAVEL. Gravel is angular to subrounded fine to coarse flint.(SUPERFICIAL DEPOSITS)

Wat

er

Bac

kfil

l

Red

uced

Lev

el

No Type Results

Depth(Thickness)Depth

Description of StrataSamples and In-situ Tests

Plan (Not to Scale)

1.45

6.00

General Remarks

All dimensions in metres 1:25Scale:


Bearing N-So

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

TR

IAL

PIT

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

7 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

Client:Contract:

TRIAL PIT LOG

Cole Green Lafarge Tarmac CGTP1Trial Pit:

MethodUsed:

PlantUsed:

LoggedBy:

CheckedBy:Machine dug WMannionTracked excavator

STRUCTURAL SOILS

6.12.13

71.84 of


6.12.13


End:

Sheet:

561259 E:526062.8 N:210870.6 21Ground Level (m):

66.84

5 B

(0.50)

5.00

4.50-5.00 Stiff brown mottled light grey spotted white, black and browngravelly silty CLAY. Gravel is angular to well rounded fine tocoarse of chalk and flint. Diamicton.(LOWESTOFT TILL FORMATION)

Trial pit terminated at 5.00m depth.

Wat

er

Bac

kfil

l

Red

uced

Lev

el

No Type Results



Plan (Not to Scale)

1.45

6.00

General Remarks



Bearing N-So

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

TR

IAL

PIT

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

7 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

Client:Contract:

TRIAL PIT LOG


MethodUsed:

PlantUsed:

LoggedBy:


STRUCTURAL SOILS

6.12.13

71.84 of


6.12.13


End:

Sheet:

561259 E:526062.8 N:210870.6 22Ground Level (m):

1. Sides mostly stable. Slight collapse between 1.30 and 2.50m depth.2. Slight seepage at 2.50m depth.3. Hole backfilled with arisings in reverse order.

1

2

3

4

5

6

B

B

B

B

B

B

(0.60)

0.60

(0.70)

1.30

(1.20)

2.50

(2.00)

4.50

0.00-0.50

0.60-1.00

1.30-2.00

2.50-3.00

3.00-4.00

4.00-4.50

Grass and leaves over stiff dark greyish brown gravelly sandyCLAY. Gravel is angular to subrounded fine to coarse flint,brick, ceramic tile and glass. Frequent rootlets.(TOPSOIL)

Stiff orange brown spotted white, black and brown gravelly siltyCLAY with low cobble content. Cobbles are angular tosubangular of flint. Gravel is angular to well rounded fine tocoarse of flint. Occasional decayed rootlets. Diamicton.(LOWESTOFT TILL FORMATION)

Soft to firm orange brown mottled light grey spotted whitegravelly sandy silty CLAY. Gravel is subangular to subroundedfine to coarse of chalk.(LOWESTOFT TILL FORMATION)

Stiff bluish grey spotted white black and brown slightly sandygravelly silty CLAY. Gravel is angular to well rounded fine tocoarse of flint, quartzite, chalk and shale. Diamicton.(LOWESTOFT TILL FORMATION)


Wat

er

Bac

kfil

l

Red

uced

Lev

el

No Type Results



Plan (Not to Scale)

1.30

5.65

General Remarks



Bearing E-Wo

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

TR

IAL

PIT

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

7 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

Client:Contract:

TRIAL PIT LOG


MethodUsed:

PlantUsed:

LoggedBy:


STRUCTURAL SOILS

5.12.13

--- of


5.12.13


End:

Sheet:

561259 E:526142.7 N:210450.0 21Ground Level (m):

Wat

er

Bac

kfil

l

Red

uced

Lev

el

No Type Results



Plan (Not to Scale)

1.30

5.65

General Remarks



Bearing E-Wo

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

TR

IAL

PIT

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

7 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

Client:Contract:

TRIAL PIT LOG


MethodUsed:

PlantUsed:

LoggedBy:


STRUCTURAL SOILS

5.12.13

--- of


5.12.13


End:

Sheet:

561259 E:526142.7 N:210450.0 22Ground Level (m):

1. Sides mostly stable. Collapsing beyond 2.70m depth.2. No groundwater encountered.3. Hole backfilled with arisings in reverse order.

63.24

62.23

60.98

59.58

1

2

3

4

B

B

B

B

(0.44)

0.44

(1.01)

1.45

(1.25)

2.70

(1.40)

4.10

0.00-0.44

0.44-1.45

1.45-2.70

2.70-4.10

Cropped firm dark brown slightly gravelly CLAY. Gravel isangular to well rounded fine to coarse of flint. Ploughed topsoil.


Orange spotted white and brown clayey gravelly SAND. Gravelis angular to well rounded fine to coarse of flint and quartzite.(KESGRAVE CATCHMENT SUBGROUP)

Light orange brown spotted white black and brown SAND andGRAVEL with low cobble content. Cobbles are subrounded towell rounded of flint. Gravel are angular to well rounded fine tocoarse of flint and quartzite.(KESGRAVE CATCHMENT SUBGROUP)


Wat

er

Bac

kfil

l

Red

uced

Lev

el

No Type Results



Plan (Not to Scale)

1.45

3.70

General Remarks



Bearing E-Wo

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

TR

IAL

PIT

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

7 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

Client:Contract:

TRIAL PIT LOG


MethodUsed:

PlantUsed:

LoggedBy:


STRUCTURAL SOILS

9.12.13

63.68 of


9.12.13


End:

Sheet:

561259 E:526681.1 N:210344.9 11Ground Level (m):

1. Hit ceramic field drain at 0.80m depth - positioned hole further north.2. Sides table. No groundwater encountered.3. Hole backfilled with arisings in reverse order.

62.89

62.54

61.74

59.04

1

2

3

4

B

B

B

B

(0.45)

0.45

(0.35)

0.80

(0.80)

1.60

(2.70)

4.30

0.00-0.45

0.45-0.80

0.80-1.60

1.60-4.30

Cropped firm dark greyish brown slightly gravelly sandy CLAY.Gravel is angular to well rounded fine to coarse flint. Ploughedtopsoil.

Firm to stiff reddish brown slightly gravelly sandy CLAY.Gravel is angular to subrounded fine to medium of flint andchalk. (unassigned).(SUPERFICIAL DEPOSITS)

Stiff mottled light brown light grey and orange gravelly sandyCLAY with low cobble content. Cobbles are subangular to wellrounded of flint. Gravel is angular to well rounded fine to coarseof flint and chalk. Diamicton.(LOWESTOFT TILL FORMATION)

Stiff bluish grey gravelly sandy CLAY with low cobble content.Cobbles are subangular to well rounded of flint. Gravel isangular to well rounded fine to coarse of flint and chalk.Dimication.(LOWESTOFT TILL FORMATION)


Wat

er

Bac

kfil

l

Red

uced

Lev

el

No Type Results



Plan (Not to Scale)

1.30

6.60

General Remarks



Bearing N-So

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

TR

IAL

PIT

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

7 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

Client:Contract:

TRIAL PIT LOG


MethodUsed:

PlantUsed:

LoggedBy:


STRUCTURAL SOILS

6.12.13

63.34 of


6.12.13


End:

Sheet:

561259 E:527079.6 N:210323.6 11Ground Level (m):

1. Sides mostly stable.2. Slight seepage at 2.25m depth with minor collapse.3. Hole backfilled with arisings in reverse order.

67.89

66.34

65.74

64.14

63.74

1

2

3

4

5

B

B

B

B

B

(0.35)

0.35

(1.55)

1.90

(0.60)

2.50

(1.60)

4.10

(0.40)

4.50

0.00-0.35

0.35-1.90

1.90-2.50

2.50-4.10

4.10-4.50

Cropped firm dark brown slightly gravelly silty CLAY. Gravelis angular to well rounded fine to coarse of flint and quartzite.Ploughed topsoil.


Firm light brown mottled light grey sandy CLAY.(SUPERFICIAL DEPOSITS)

Soft to firm grey slightly gravelly sandy SILT. Gravel is angularto subrounded fine to medium of chalk.(SUPERFICIAL DEPOSITS)

Firm grey spotted white gravelly sandy CLAY with low cobblecontent. Cobbles are subangular to subrounded of chalk. Gravelis angular to subrounded fine to coarse of chalk. Dimication.(LOWESTOFT TILL FORMATION)


Wat

er

Bac

kfil

l

Red

uced

Lev

el

No Type Results



Plan (Not to Scale)

1.40

4.60

General Remarks



Bearing E-Wo

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

TR

IAL

PIT

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

7 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

Client:Contract:

TRIAL PIT LOG


MethodUsed:

PlantUsed:

LoggedBy:


STRUCTURAL SOILS

9.12.13

68.24 of


9.12.13


End:

Sheet:

561259 E:526746.4 N:210446.5 21Ground Level (m):

Wat

er

Bac

kfil

l

Red

uced

Lev

el

No Type Results



Plan (Not to Scale)

1.40

4.60

General Remarks



Bearing E-Wo

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

TR

IAL

PIT

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

7 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

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, Em

ail:

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@so

ils.

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Client:Contract:

TRIAL PIT LOG


MethodUsed:

PlantUsed:

LoggedBy:


STRUCTURAL SOILS

9.12.13

68.24 of


9.12.13


End:

Sheet:

561259 E:526746.4 N:210446.5 22Ground Level (m):

1. Sides collapsing beyond 3.00m depth.2. No groundwater encountered.3. Hole backfilled with arisings in reverse order.

61.22

60.57

58.17

1

2

3

B

B

B

(0.30)

0.30

(0.65)

0.95

(2.40)

3.35

0.00-0.30

0.30-0.95

0.95-3.35

Poorly cropped greyish brown spotted white, black and whitegravelly sandy SILT/CLAY. Gravel is angular to well roundedfine to coarse of flint and chalk with minor ceramic tile.Ploughed.(TOPSOIL)Orange brown spotted white black and brown clayey SAND andGRAVEL.(SUPERFICIAL DEPOSITS)

Light orange brown spotted white black and brown slightlyclayey SAND and GRAVEL with medium cobble content.Cobbles are subangular to subrounded of flint. Gravel issubangular to well rounded fine to coarse of flint and quartzite.(KESGRAVE CATCHMENT SUBGROUP)


Wat

er

Bac

kfil

l

Red

uced

Lev

el

No Type Results



Plan (Not to Scale)

1.45

4.10

General Remarks



Bearing N-So

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

TR

IAL

PIT

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

7 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

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o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

Client:Contract:

TRIAL PIT LOG


MethodUsed:

PlantUsed:

LoggedBy:


STRUCTURAL SOILS

9.12.13

61.52 of


9.12.13


End:

Sheet:

561259 E:526490.4 N:210346.7 11Ground Level (m):

1. Sides collapsing between 0.50 to 3.30m depth.2. Hole backfilled with arisings in reverse order.

69.48

68.88

66.68

65.48

1

2

3

4

5

B

B

B

B

B

(0.50)

0.50

(0.60)

1.10

(2.20)

3.30

(1.20)

4.50

0.00-0.50

0.50-1.10

1.10-2.00

2.00-3.00

3.30-4.00

Cropped dark brown slightly gravelly SILT and fine SAND.Gravel is well rounded coarse of flint. Ploughed topsoil.

Orange spotted white black and brown slightly gravelly SAND.Gravel is angular to well rounded fine to coarse of flint.(SUPERFICIAL DEPOSITS)

Firm to stiff orange brown mottled light grey sandy CLAY.Thinly laminated in parts.(SUPERFICIAL DEPOSITS)

Stiff bluish grey spotted white black and brown slightly sandygravelly silty CLAY. Gravel is angular to well rounded fine tocoarse of flint, quartzite and chalk. Diamicton.(LOWESTOFT TILL FORMATION)


Wat

er

Bac

kfil

l

Red

uced

Lev

el

No Type Results



Plan (Not to Scale)

2.30

5.40

General Remarks



Bearing N-So

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

TR

IAL

PIT

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

7 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

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eb: w

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.soi

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, Em

ail:

ask

@so

ils.

co.u

k.

Client:Contract:

TRIAL PIT LOG


MethodUsed:

PlantUsed:

LoggedBy:


STRUCTURAL SOILS

5.12.13

69.98 of


5.12.13


End:

Sheet:

561259 E:526229.5 N:210591.2 21Ground Level (m):

Wat

er

Bac

kfil

l

Red

uced

Lev

el

No Type Results



Plan (Not to Scale)

2.30

5.40

General Remarks



Bearing N-So

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

TR

IAL

PIT

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

7 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

Client:Contract:

TRIAL PIT LOG


MethodUsed:

PlantUsed:

LoggedBy:


STRUCTURAL SOILS

5.12.13

69.98 of


5.12.13


End:

Sheet:

561259 E:526229.5 N:210591.2 22Ground Level (m):

1. Beached out.2. Hole backfilled with arisings in reverse order.

71.83

69.03

1

2

3

4

B

B

B

B

(0.30)

0.30

(2.80)

3.10

(1.70)

0.00-0.30

0.30-0.60

0.60-3.10

3.10-4.50

Cropped dark brown slightly gravelly sandy SILT. Gravel iswell rounded coarse of flint. Ploughed topsoil.

Orange spotted white black and brown slightly gravelly SAND.Gravel is angular to well rounded fine to coarse of flint.(SUPERFICIAL DEPOSITS)

Firm to stiff orange mottled light grey sandy CLAY.(SUPERFICIAL DEPOSITS)

. . . below 4.50m depth becoming uniformly grey.

Wat

er

Bac

kfil

l

Red

uced

Lev

el

No Type Results



Plan (Not to Scale)

1.80

6.00

General Remarks



Bearing N-So

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

TR

IAL

PIT

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

7 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

Client:Contract:

TRIAL PIT LOG


MethodUsed:

PlantUsed:

LoggedBy:


STRUCTURAL SOILS

5.12.13

72.13 of


5.12.13


End:

Sheet:

561259 E:526301.5 N:210714.6 21Ground Level (m):

67.33

5 B

4.80

4.50-4.80 Firm to stiff orange mottled light grey sandy CLAY.(SUPERFICIAL DEPOSITS)(stratum copied from 3.10m from previous sheet)

Trial pit terminated at 4.80m depth.W

ater

Bac

kfil

l

Red

uced

Lev

el

No Type Results



Plan (Not to Scale)

1.80

6.00

General Remarks



Bearing N-So

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

TR

IAL

PIT

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

7 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

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ls.c

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, Em

ail:

ask

@so

ils.

co.u

k.

Client:Contract:

TRIAL PIT LOG


MethodUsed:

PlantUsed:

LoggedBy:


STRUCTURAL SOILS

5.12.13

72.13 of


5.12.13


End:

Sheet:

561259 E:526301.5 N:210714.6 22Ground Level (m):

1. Sides mostly stable.2. Significant seepages at 3.00m depth with subsequent collapse.3. Hole backfilled with arisings in reverse order.

69.78

69.43

67.33

66.93

66.73

1

2

3

4

5

B

B

B

B

B

(0.35)

0.35

(0.35)

0.70

(2.10)

2.80

(0.40)

3.20

3.40

0.00-0.35

0.35-0.70

0.70-2.80

2.80-3.20

3.20-3.40

Cropped firm to stiff dark greyish brown gravelly sandy CLAY.Gravel is angular to well rounded fine to coarse of flint andchalk. Ploughed topsoil.

Firm to stiff mottled light brown and orange slightly gravellysandy CLAY. Gravel is angular to subrounded fine to coarse offlint.(SUPERFICIAL DEPOSITS)

Firm to stiff mottled light brown light grey and orange spottedwhite gravelly sandy CLAY with low cobble content. Cobblesare subangular of flint and chalk. Gravel is angular tosubrounded fine to coarse of flint and chalk. Diamicton.(LOWESTOFT TILL FORMATION)

Very stiff bluish grey spotted white black and brown gravellysandy CLAY. Gravel is subangular to well rounded of flint andchalk. Diamicton.(LOWESTOFT TILL FORMATION)

Orange spotted white SAND with soft to firm orange brownspotted white gravelly sandy SILT/CLAY.


Wat

er

Bac

kfil

l

Red

uced

Lev

el

No Type Results



Plan (Not to Scale)

1.45

6.20

General Remarks



Bearing N-So

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

TR

IAL

PIT

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

7 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

Client:Contract:

TRIAL PIT LOG


MethodUsed:

PlantUsed:

LoggedBy:


STRUCTURAL SOILS

6.12.13

70.13 of


6.12.13


End:

Sheet:

561259 E:526242.4 N:211073.9 11Ground Level (m):

1. Collapse from 3.00m depth with significant seepage.2. Trial pit unstable.3. Hole backfilled with arisings in reverse order.

70.22

68.12

67.52

66.87

66.02

1

2

3

4

5

B

B

B

B

B

(0.30)

0.30

(2.10)

2.40

(0.60)

3.00

(0.65)

3.65

(0.85)

4.50

0.00-0.30

0.30-2.40

2.40-3.00

3.00-3.65

3.65-4.50

Cropped dark brown slightly gravelly SILT and fine SAND.Gravel is angular to well rounded fine to coarse flint. Ploughedtopsoil.


Firm light brown sandy CLAY.(SUPERFICIAL DEPOSITS)

Orange spotted white gravelly SAND. Gravel is angular tosubrounded fine to medium of flint and quartzite.(SUPERFICIAL DEPOSITS)

Light orange brown spotted white SAND and GRAVEL. Gravelis angular to well rounded fine to coarse of flint and chalk.(unassigned).(SUPERFICIAL DEPOSITS)


Wat

er

Bac

kfil

l

Red

uced

Lev

el

No Type Results



Plan (Not to Scale)

1.50

6.00

General Remarks



Bearing N-So

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

TR

IAL

PIT

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

7 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

Client:Contract:

TRIAL PIT LOG


MethodUsed:

PlantUsed:

LoggedBy:


STRUCTURAL SOILS

6.12.13

70.52 of


6.12.13


End:

Sheet:

561259 E:526090.9 N:211103.4 21Ground Level (m):

Wat

er

Bac

kfil

l

Red

uced

Lev

el

No Type Results



Plan (Not to Scale)

1.50

6.00

General Remarks



Bearing N-So

GIN

T_L

IBR

AR

Y_V

8_05

.GL

B L

ibV

ersi

on: v

8_05

- L

ib00

04 P

rjV

ersi

on: v

8_05

- C

ore+

Log

s 00

03 |

Log

TR

IAL

PIT

LO

G |

5612

59_C

OL

E_G

RE

EN

.GP

J -

v8_0

5 | 4

/9/1

4 -

17:3

7 | L

M.

Str

uctu

ral S

oils

Ltd

, Bra

nch

Off

ice

- H

emel

Hem

pste

ad: 1

8 F

rogm

ore

Roa

d, H

emel

Hem

pste

ad, H

ertf

ords

hire

, HP

3 9R

T. T

el: 0

1442

416

660,

Fax

: 014

42 4

3755

0, W

eb: w

ww

.soi

ls.c

o.uk

, Em

ail:

ask

@so

ils.

co.u

k.

Client:Contract:

TRIAL PIT LOG


MethodUsed:

PlantUsed:

LoggedBy:


STRUCTURAL SOILS

6.12.13

70.52 of


6.12.13


End:

Sheet:

561259 E:526090.9 N:211103.4 22Ground Level (m):

561259r.original.doc Page iii Structural Soils Limited

APPENDIX C

(i) Permeability Test Results

(ii) Well Development Results

Documents

LAFARGE TARMAC - Welwyn Hatfield Borough Council