Soils Geology Hydrology and Hydrogeology Part 5 Appendix B to Part 2

300 Pages·2017·8.05 MB·English

Mott MacDonald | Velindre Cancer Centre 7
Preliminary Contaminated Land Risk Assessment

B. Factual Ground Investigation Report
(ESG, 2016)
364561 | ES08 | B | 14 February 2017
C:\Users\phi36064\AppData\Roaming\OpenText\OTEdit\EC_EUNAPiMS\c2103070946\364561 Preliminary Risk Assessment ECP Approved.docx
VELINDRE CANCER HOSPITAL, CARDIFF
FACTUAL REPORT ON GROUND INVESTIGATION
Report No H6108-16
January 2017
Carried out for:
Velindre NHS Trust
Velindre NHS Trust Headquarters
Unit 2
Charnwood Court Heol Billingsley
Parc
Nantgarw
Cardiff
CF15 7QZ
Engineer:
Mott MacDonald Ltd
Fitzalan House
Fitzalan Road
Cardiff
CF24 0EL
ESG

Unit 15, Crosby Yard,
Wildmill, Bridgend,
CF31 1JZ
Tel: [phone] Email: [email protected]

Report No H6108-16

January 2017

Issue No Status Prepared by Checked by Approved by
Date
NAME and QUALIFICATIONS NAME and QUALIFICATIONS NAME and QUALIFICATIONS
Adam Putt Lynne Llewellyn Lynne Llewellyn
1
BSc (Hons) FGS BSc (Hons) CGeol FGS BSc (Hons) CGeol FGS
Draft
report SIGNATURE SIGNATURE SIGNATURE
December
2016

NAME and QUALIFICATIONS NAME and QUALIFICATIONS NAME and QUALIFICATIONS
Adam Putt Adam Putt
1 Ellen Phillips BSc (Hons) FGS BSc (Hons) FGS
Final
BSc (Hons) FGS
report
SIGNATURE SIGNATURE SIGNATURE
January
2017

NAME and QUALIFICATIONS NAME and QUALIFICATIONS NAME and QUALIFICATIONS

SIGNATURE SIGNATURE SIGNATURE

This Report has been prepared by ESG Limited (“ESGL”) with all reasonable skill and care, within the terms and conditions of the contract
between ESGL and the Client (“Contract”) and within the limitations of the resources devoted to it by agreement with the Client. Any reliance
upon the Report is subject to the Contract terms and conditions.

This Report is confidential between the Client and ESGL. ESGL accepts no responsibility whatsoever to third parties to whom this document,
or any part thereof, is made known. Any such party relies upon the Report at their own risk. The Contracts (Rights of Third Parties) Act 1999
does not apply to this Report nor the Contract and the provisions of the said Act are hereby excluded.

This Report shall not be used for engineering or contractual purposes unless signed above by the author, checker and the approver for and
on behalf of ESGL and unless the Report status is ‘Final’.

Unless specifically assigned or transferred within the terms and conditions of the Contract, ESGL asserts and retains all Copyright and other
Intellectual Property Rights in and over the Report and its contents. The Report may not be copied or reproduced, in whole or in part, without
the written authorisation from ESGL. ESGL shall not be liable for any use of the Report for any purpose other than that for which it was
originally prepared.

Whilst every effort has been made to ensure the accuracy of the data supplied and any analysis interpretation derived from it, the possibility
exists of variations in the ground and groundwater conditions around and between the exploratory positions. No liability can be accepted for
any such variations in these conditions. Furthermore, any recommendations are specific to the development as detailed in this Report and no
liability will be accepted should they be used for the design of alternative schemes without prior consultant with ESGL

ESG Limited
www.esg.co.uk Reg office: ESG House, Bretby Business Park, Ashby Road, Burton upon Trent, DE15 0YZ
Incorporated in England: 02880501
C O N T E N T S
Page
1 INTRODUCTION ................................................................................................................. 1
2 SITE SETTING .................................................................................................................... 1
2.1 Location and Description ........................................................................................... 1
2.2 Published Geology ..................................................................................................... 2
3 FIELDWORK ....................................................................................................................... 2
3.1 Exploratory Holes ...................................................................................................... 2
3.2 Groundwater and Gas Monitoring .............................................................................. 3
3.3 In Situ Testing ............................................................................................................ 3
4 LABORATORY TESTING ................................................................................................... 4
4.1 Geotechnical Testing ................................................................................................. 4
4.2 Geoenvironmental Testing ......................................................................................... 4
REFERENCES ............................................................................................................................... 5

APPENDIX A FIGURES AND DRAWINGS
APPENDIX B EXPLORATORY HOLE RECORDS
APPENDIX C INSTRUMENTATION AND MONITORING
APPENDIX D IN SITU TESTING
APPENDIX E GEOTECHNICAL LABORATORY TEST RESULTS
APPENDIX F GEOENVIRONMENTAL LABORATORY TEST RESULTS
APPENDIX G PHOTOGRAPHS

January 2017 Report No H6108-16
Issue 1 Contents
1 INTRODUCTION

In August 2016 ESG was commissioned by Mott MacDonald (MM), on behalf of Velindre NHS
Trust, to carry out a ground investigation at a site to the north of Whitchurch Hospital, Cardiff. The
investigation was required to obtain geotechnical and geoenvironmental information for a proposed
new cancer hospital.

The scope of the investigation was specified by MM and comprised cable percussion boreholes,
dynamically sampled with rotary follow on coring boreholes, sonic boreholes, machine excavated
trial pits, in situ testing and laboratory testing. The investigation was performed in accordance with
the contract specification, and the general requirements of BS 5930 (2015), BS EN 1997-2 (2007),
BS EN ISO 22475-1 (2006) and other relevant related standards identified below. The fieldwork
took place between 26 September and 27 October 2016.

This report presents the factual records of the fieldwork and laboratory testing.

2 SITE SETTING

2.1 Location and Description

The site is located approximately 6 km to the northwest of Cardiff city centre, at National Grid
reference ST 143808, see Site Location Plan in Appendix A.

The site is irregular in shape and measures approximately 4 hectares. The site dominated by an
area of flat ground in the south, which is currently meadowland. The northern part of the site is
more undulating and is vegetated with some mature trees. Along the western boundary is a narrow
strip of woodland that forms part of a slope towards the Glamorganshire Canal, this area is
designated a SSSI. A disused railway cutting runs immediately adjacent to the northern boundary
of the site and an adopted highway running in a northeast-southwest orientation dissect the area of
investigation from the site compound located immediately to the east. A single dwelling was once
present in the south west corner of the site, which was previously used as a farmstead. To the
south of the site is Whitchurch Hospital and associated infrastructure.

January 2017 Report No H6108-16
Issue 1 Page 1 of 4
2.2 Published Geology

The published geological map for the area, BGS Sheet 263 (1986) and the BGS Geology of Britain
Viewer (2016) shows the site located on Glacial Till of Devensian age.

The solid geology is indicated to comprise Llanishen Conglomerate of Devonian age. These are
indicated to comprise interbedded sandstone and conglomerate.

3 FIELDWORK

The fieldwork was carried out in general accordance with BS 5930 (2015), BS EN 1997-2 (2007)
and BS EN ISO 22475-1 (2006).

The exploratory hole and in situ test locations were specified by MM. The exploratory holes were
set out using GPS. The co-ordinates and reduced levels were surveyed by ESG to National Grid
and Ordnance Datum. The exploratory hole and in situ test locations are shown on the Site Plan in
Appendix A.

3.1 Exploratory Holes
The exploratory holes are listed in the following table.

TABLE 1 : SUMMARY OF EXPLORATORY HOLES
MAXIMUM
TYPE QUANTITY EXPLORATORY HOLE REFERENCE
DEPTH (m)
Cable Percussion Boring 17 10.00 BH01 to BH17
Dynamically Sampled with
4 28.00 BH01R, BH03R, BH06R and BH07R
Rotary follow on Coring
Sonic Drilling 3 22.30 BH02S, BH04S and BH08S
Machine Excavated Trial Pit 4 4.30 SA01 to SA10 and TP03 to TP22

The exploratory hole logs are presented in Appendix B. These provide information including the
equipment and methods used, samples taken, tests carried out, water observations and
descriptions of the strata encountered. Explanation of the terms and abbreviations used on the
logs is given in the Key to Exploratory Hole Records in Appendix B, together with other
explanatory information. The logging of soil is in accordance with BS EN ISO 14688-1+A1 (2013)
as amplified by BS 5930 (2015).

January 2017 Report No H6108-16
Issue 1 Page 2 of 4
Photographs of the trial pits and sonic drilled core are presented in Appendix G.

On completion of the fieldwork geotechnical samples were transported to the Bridgend office of
ESG for temporary retention, with those required for testing being transferred to the ESG
laboratories. Geoenvironmental samples were transported from site directly to the laboratory at
ESG.

3.2 Groundwater and Gas Monitoring

Instrumentation installed in the exploratory holes for groundwater and gas monitoring are shown
on the logs and summarised in Appendix C. Records of monitoring carried out by ESG after the
fieldwork period are presented in Appendix C. At the time of writing this report, two rounds of
groundwater and one round of gas monitoring have been completed. It is proposed to complete
three rounds of gas and groundwater monitoring as part of this contract.

3.3 In Situ Testing

In situ testing was carried out in accordance with the relevant standards as tabulated below. The
testing is summarised in the following table and the results are presented in Appendix D unless
noted otherwise. Calibration certificates where appropriate are included with the results in the
appendix.

TABLE 2: SUMMARY OF IN SITU TESTING
TYPE QUANTITY REMARKS
Standard Penetration Test 179 BS EN ISO 22476-3 (2011). Results presented on logs in Appendix B
California Bearing Ratio 16 BS 1377 (1990)
Soakaway Testing 9 BRE Digest 365 (2007)
Variable Head Testing 9 BS 5930 (2015)

January 2017 Report No H6108-16
Issue 1 Page 3 of 4
4 LABORATORY TESTING

4.1 Geotechnical Testing

Geotechnical laboratory testing was scheduled by MM and was carried out in accordance with
BS 1377 (1990) and BS EN ISO 17892 (2014) Part 1 unless otherwise stated. The testing is
summarised below and the results are presented in Appendix E.

Water Content Determination
Atterberg Limit Determination
Particle Size Distribution Analysis
pH, Acid and Water Soluble Sulphate and Total Sulphur Content of Soils. Test methods are
BS 1377 (1990) or others recognised in BRE Special Digest 1 (2005); they are indicated on
the results report sheets in Appendix E.
Unconsolidated Undrained Triaxial Compression Testing
California Bearing Ratio / Moisture Content Relationship
Dry Density / Moisture Content Relationship – Light Compaction
Dry Density / Moisture Content Relationship – Heavy Compaction
Soil Organic Matter
Particle Density Testing

4.2 Geoenvironmental Testing

Geoenvironmental laboratory testing was scheduled by MM on the soil samples recovered during
the fieldwork. The testing was carried out by the laboratory at Burton on Trent. The results are
presented in Appendix F.

January 2017 Report No H6108-16
Issue 1 Page 4 of 4
REFERENCES

BGS England and Wales Sheet 263 : 1986 : Cardiff. 1:50000 geological map (solid and drift).
British Geological Survey.

BGS Geology of Britain Viewer : 2016. www.bgs.ac.uk. British Geological Survey.

BRE Digest 365 : 2007 : Soakaway design. Building Research Establishment, Garston, Watford.

BRE Special Digest 1 : 2005 : Concrete in aggressive ground. Building Research Establishment.

BS 1377 : 1990 : Methods of test for soils for civil engineering purposes. British Standards
Institution.

BS 5930 : 2015 : Code of practice for ground investigations. British Standards Institution.

BS EN 1997-2 : 2007 : Eurocode 7 - Geotechnical design - Part 2 Ground investigation and
testing. British Standards Institution.

BS EN ISO 14688-1:2002+A1 : 2013 : Geotechnical investigation and testing - Identification and
classification of soil - Part 1 Identification and description. British Standards Institution.

BS EN ISO 14688-2:2004+A1 : 2013 : Geotechnical investigation and testing - Identification and
classification of soil - Part 2 Principles for a classification. British Standards Institution.

BS EN ISO 17892-1 : 2014 : Geotechnical investigation and testing – Laboratory Testing of soil –
Determination of water content.

BS EN ISO 22475-1 : 2006 : Geotechnical investigation and testing – Sampling methods and
groundwater measurements - Part 1 Technical principles for execution. British Standards
Institution.

BS EN ISO 22476-3:2005+A1 : 2011 : Geotechnical investigation and testing - Field testing - Part
3 Standard penetration test. British Standards Institution.

January 2017 Report No H6108-16
Issue 1 Page 5 of 4
APPENDIX A
FIGURES AND DRAWINGS
Site Location Plan A1
Site Plan 364561-MMD-XX-00-DR-C-0004
January 2017 Report No H6108-16
Issue 1 Appendix A