19 Craigans, Crawley, RH11 8BL Lloyds Banking Group ... · 19 Craigans, Crawley, RH11 8BL Lloyds Banking Group ... Report Date: 04 July 2016 ... The Atterberg Limit test may be used

19 Craigans, Crawley, RH11 8BL

Lloyds Banking Group GEOTECHNICAL

GEOTECHNICAL for Lloyds Banking Group


Client: Lloyds Banking Group

Client Contact: Mark Saunders

Client Ref: 101561885

Policy Holder: Mrs V Bowditch

Report Date: 04 July 2016

Our Ref: C13801G11960

Site Plan

Borehole

Foul Water Drain

Foul Manhole

Foul Rodding Point

Foul Vent Pipe

Trial Pit /

Borehole

Surface Water

Drain

Rain Water

Manhole

Surface Rodding Point

Rain Water Gully

Trial Pit

Combined Drain

Combined Manhole



BH4 Borehole Log



BH5 Borehole Log



Site Observations

GENERAL:

Site Investigation works were undertaken on 21 June 2016 during dry weather (i.e. no rain).

TP 1, TP/BH 2 and BH 3 were undertaken during a previous site investigation on 9 June 2014 with the

results presented within the report dated 20 June 2014.

HEALTH AND SAFETY:

Negative signal obtained in Power, Radio and Genny mode on the Cable Avoidance Tool (CAT) at BH 4

and BH 5.

BOREHOLE:

No further samples possible from 3.50m and 3.30m bgl due to friable soils preventing sample recovery

in BH 4 and BH 5 respectively. Borehole terminated. No further works undertaken.

ROOTS:

Roots encountered to 2.70m and 2.80m bgl in BH 4 and BH 5 respectively.

INSITU TESTING:

Hand Shear Vane (SV) not undertaken from 1.70m to 2.50m bgl in BH 4 and BH 5 due to the soils

granular content. Switched to Mackintosh Probe (MP) undertaken at 1.70m bgl within the hand auger

borehole and thereafter in the hand auger borehole at 2.20m bgl in BH 4 and BH 5.

Hand Shear Vane (SV) undertaken at 2.50m bgl within the hand auger borehole and thereafter in the

hand auger borehole at maximum 0.50m intervals in BH 4 and BH 5.

WATER STRIKES:

No water strike/s (NWS) encountered in BH 4 and BH 5.

The groundwater observations do not necessarily indicate equilibrium conditions. It should be

appreciated that groundwater levels are subject to both seasonal and weather induced variations.

Other effects such as construction activities may also change groundwater levels.


101561885

Page 1 of 4

SOILS

SOIL ANALYSIS for Lloyds Banking Group




Claim Number: 101561885


Report Date: 28 June 2016

Our Ref: C8683S13801

Laboratory Ref: S8683

Compiled By:

Checked By:

Date samples received: 22 June 2016

Moisture Content Test Date: 22 June 2016

Atterberg Limits Test Date: 24 June 2016

9265


101561885

Page 2 of 4

SOILS

Notes relating to soils testing

Unless otherwise stated, all soils testi g as u dertake at E iro e tal Ser i es’ soils la oratory at u it H Maybrook Business Park, B76 1AL.

Soil samples have been prepared in accordance with BS1377:Part 1: 1990 Section 7

Descriptions of soil samples within the laboratory have been undertaken generally in accordance with

BS5930:1999

Following the issue of this soil analysis report, samples will be retained for 1 month should additional testing, or

referencing, be required. It should be noted that any tests undertaken on soils retained subsequent to the issue

of this report may not give an accurate indication of the in-situ conditions of the sample.

Natural Moisture Content Tests are undertaken in accordance with ISO 17892:Part 1:2014

The Liquid Limit test is undertaken in accordance with BS1377:Part 2:1990 Section 4.4

The Plastic Limit test and the determination of the Plasticity Index is undertaken in accordance with BS1377:Part

2:1990 Section 5

This Soil Analysis Report may not be reproduced, in part or in full, without written approval of the laboratory.


101561885

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SOILS

Note

Where appropriate moisture contents have been corrected to demonstrate the equivalent moisture content

following the sample being passed through a .425 mm sieve for comparison with the Liquid & Plastic Limit.

Where this is not available, uncorrected moisture contents have been used in the graph on the following page.

Deviations to testing schedule:

All testing has been undertaken in line with the soils testing schedule provided

Lab Ref Depth (m) MC (%) Corr MC (%) LL (%) PL (%) PI (%)

% Passing

.425mm

Samples from BH4

001 1.70 16 16 34 19 15 100

002 2.20 17

003 2.50 26 26 62 24 38 100

004 3.00 26

005 3.50 23 23 57 25 32 100

Samples from BH5

006 1.70 17 17 34 19 15 100

007 2.20 20

008 2.50 30 30 61 25 36 100

009 3.00 30

010 3.30 24 24 58 26 32 100

Corrected Moisture Content and Plastic Limits Graph


101561885

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SOILS

Lab Ref Depth (m) Description BS:5930 NHBC Chapter 4.2

Samples from BH4

001 1.70 Soft light brown/light grey CLAY with rare sand CL Low

002 2.20 Soft light brown/light grey CLAY with rare sand

003 2.50 Soft to firm light brown/light grey CLAY with rare sand CH Medium

004 3.00 Firm light brown/light grey CLAY with rare sand

005 3.50 Soft light brown/light grey CLAY with rare sand CH Medium

Samples from BH5

006 1.70 Soft light brown/light grey CLAY with rare sand CL Low





Plasticity Chart for Casagrande Classification

References and Interpretation The following provides a brief interpretation of the test results by comparison of the results to published

classifications. The Atterberg Limit test may be used to classify the plasticity of soils; the plasticity classes defined

in BS5930:1999 "Code of Practice for Site Investigations" are as follows.

CL (ML) CLAY and CLAY/SILT of Low plasticity

CI (MI) CLAY and CLAY/SILT of Intermediate plasticity

CH (MH) CLAY and CLAY/SILT of High plasticity

CV (MV) CLAY and CLAY/SILT of Very High plasticity

CE (ME) CLAY and CLAY/SILT of Extremely High plasticity

O The letter O is added to prefixes to symbolise a

significant proportion of organic matter.

NP Non-plastic

The Plasticity Index (PI) Result obtained from the Atterberg Limit tests may also be used to classify the potential

for volume change of fine soils, in accordance with the National House Building Council's standards - Chapter 4.2

(2003) "Building Near Trees", as summarised below.

Modified PI < 10 Non Classified.

Modified PI = 10 to <20 Low volume change potential.

Modified PI = 20 to <40 Medium volume change potential.

Modified PI = 40 or greater High volume change potential.

The 2003 edition of Chapter 4.2 also permits use of the Plasticity Index without modification. The classifications

for this are grouped by soil type (soils with similar visual soils description and using unmodified Plasticity Indices.


101561885

Registered in England No. 295427 Registered Office: Unit 4 Linnet Court, Cawledge Business Park, Alnwick, NE66 2GD

ROOTS

ROOT IDENTIFICATION for Lloyds Banking Group




Claim Number: 101561885

Client Reference: 101561885


Report Date: 23 June 2016

Our Ref: R14054

Sub Sample Species Identified Root Diameter Starch

TP/BH4:

1.7-2.5m Aesculus spp. 1 1.5 mm Abundant

1.7-2.5m Populus or Salix spp. 1 mm Absent

1.7-2.5m broadleaved species, too decayed for positive

identification

2 <1 mm Absent


identification

<1 mm Absent

TP/BH5:


identification

2 1 mm Absent

1.7-2.5m Ulmus spp. <1 mm Absent

2.5-2.8m broadleaved species, too juvenile for positive

identification

3 <1 mm Absent

Comments:

1 - Plus 1 other also identified as Aesculus spp.

2 - Possibly ash.

3 - Plus 1 other the same. Also in a state of decay.

Aesculus spp. are horse chestnuts.

Populus spp. are poplars and aspen; Salix spp. are willows.

Ulmus spp. are elms.

Signed: M D Mitchell

Unless we are otherwise instructed in writing, the above sample material will normally be disposed of 6 years

after the date of this report.

Intec

Parc Menai, Bangor,

Gwynedd, North Wales

LL57 4FG

Tel: 01248 672652

Fax: 01248 672601

Documents

19 Craigans, Crawley, RH11 8BL Lloyds Banking Group ... · 19 Craigans, Crawley, RH11 8BL Lloyds Banking Group ... Report Date: 04 July 2016 ... The Atterberg Limit test may be used