FACTUAL REPORT ON GROUND INVESTIGATION …planningdocs.gloucester.gov.uk/webcache/81D390/81D... · ISO 14688-1:2002, BS EN ISO 14688-2:2004 and BS EN ISO 14689-1:2003, and makes reference

Geotechnical Engineering Ltd Centurion House, Olympus Park Quedgeley, Gloucester. GL2 4NF 01452 527743 www.geoeng.co.uk

WESTGATE PARK, GLOUCESTER

FACTUAL REPORT ON GROUND INVESTIGATION

Prepared for GLOUCESTER CITY COUNCIL

Report Ref: 29638

http://www.geoeng.co.uk/

Geotechnical Engineering Limited

www.geoeng.co.uk


FACTUAL REPORT ON GROUND INVESTIGATION

Prepared for GLOUCESTER CITY COUNCIL

Report Ref: 29638

PROJECT: Proposed BMX Track

VOLUME - VERSION STATUS ORIGINATOR CHECKER APPROVED DATE

1 of 1 – A FINAL NP CT CT 29/07/14

ORIGINATOR APPROVER

N V Parry BEng MSc CEng MICE MCIHT SiLC Director

C Thomas BSc PhD FGS Geotechnical Consultant

The report is not to be used for contractual or engineering purposes unless this sheet is signed and the

report designated “Final”. The report has been prepared for the sole use and reliance by Gloucester City Council. GEL accepts no

liability as a result of the use or reliance of this report by any other parties.



www.geoeng.co.uk

RT01 v09 18/07/12 JH Report Ref: 29638 Page i

CONTENTS

REPORT PAGE

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

2. SITE LOCATION AND GEOLOGY ....................................................................................1

3. GROUND INVESTIGATION ............................................................................................1

3.1 Fieldwork ..................................................................................................................1

3.2 Logging .....................................................................................................................2

3.3 Laboratory Testing ...................................................................................................3

4. REFERENCES .................................................................................................................4

FIGURES Nos.

SITE PLAN 1

APPENDICES

APPENDIX A FIELDWORK DATA

APPENDIX B CHEMICAL ANALYSES



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RT01 v09 18/07/12 JH Report Ref: 29638 Page 1

1. INTRODUCTION

It is proposed to install a BMX track in an amenity area adjacent to Westgate Boating Lake in

Gloucester. Geotechnical Engineering Limited (GEL) was instructed by Gloucester City Council

to carry out an investigation to determine the ground conditions.

The scope of works and terms and conditions of appointment were specified by the Client and

GEL correspondence reference T19476/01 dated 11 July 2014.

This report describes the investigation and presents the findings.

2. SITE LOCATION AND GEOLOGY

The site is situated at Westgate Park adjacent to St Oswald’s Road, Gloucester and may be

located by its National Grid co-ordinates SO 825 192.

British Geological Survey (BGS) England and Wales (Sheet No. 234, 1:50,000) and the BGS

online geology (1:50,000) indicate the site is underlain by Estuarine Alluvium over Blue Lias

Formation and Charmouth Mudstone Formation (undifferentiated).

3. GROUND INVESTIGATION

3.1 Fieldwork

The fieldwork was carried out in general accordance with BS5930:1999+A2:2010 on 15th July

2014 and comprised seven hand dug trial pits.



www.geoeng.co.uk


The exploratory hole locations were selected by the Client and set out by this Company and

are shown on Figure 1.

The trial pits, referenced TP01 to TP07 (Appendix A), were formed by hand. Representative

disturbed samples were taken and retained in plastic tubs and amber jars to retain moisture

content.

On completion all trial pits were backfilled with arisings. The ground surface was reinstated

using turf cut at the commencement of the pit.

Samples for chemical analyses were dispatched from site directly to Chemtest Newmarket

under a Chain of Custody.

3.2 Logging

The logging of soils and rocks was carried out by an Engineering Geologist in general

accordance with BS5930:1999+A2:2010. A key to the exploratory hole logs is presented in

Appendix A.

The trial pits were logged in situ. Detailed descriptions are given in the trial pit logs, Appendix

A, along with details of sampling, groundwater ingress and relevant comments on stability.



www.geoeng.co.uk


3.3 Laboratory Testing

Selected samples were dispatched to Chemtest, Newmarket, where chemical analyses were

carried out to in-house methods for a suite of contaminants. The results are presented in

Appendix B.

GEOTECHNICAL ENGINEERING LIMITED



www.geoeng.co.uk


4. REFERENCES

British Standards Institution (2010): Code of practice for site investigations. BS 5930

incorporating Amendments No. 1 & 2. Amendment 1 removes text superseded by BS EN

ISO 14688-1:2002, BS EN ISO 14688-2:2004 and BS EN ISO 14689-1:2003, and makes

reference to the relevant standard for each affected sub clause. Amendment 2 removes

text superseded by BS EN 22475-1:2006 and makes reference to the relevant standard for

each affected sub clause.


N


SITE PLAN

Key:CLIENT GLOUCESTER CITY COUNCIL

Approximate Trial Pit Location

SITE WESTGATE PARK

SCALE UNKNOWN

CONTRACT FIGURE

29638 1

Reproduced from the Ordnance Survey map with permission of

the controller of Her Majesty's Stationery Office. Crown Copyright

Reserved. Licence No. AL100002447.

TP01

TP02

TP03TP04

TP05

TP06

TP07

St Oswalds Road

FIELDWORK DATA

2963

8

APPENDIX A


2963

8

Soil

Backfill

ConcreteGranular

response zone

Estimated boundary Grading boundary


D* Contamination

C Core

B Bulk disturbed

U Undisturbed

LB Large bulk disturbed

UT Undisturbed thin wall

W Water

P Piston

D Small disturbed

X Dynamic

Test type

Cs Core subsample (prepared)

S SPT - Split spoon sampler followed by uncorrected SPT 'N' Value

C SPT - Solid cone followed by uncorrected SPT 'N' Value

Sample/core range/If

Dynamic sample

Undisturbed sample - open drive including thin wall. Symbol length reflects recovery

x x = Total Core Recovery (TCR) as percentage of core run

y y = Solid Core Recovery (SCR) as percentage of core run. Assessment of core is based on full diameter.

z z = Rock Quality Designation (RQD). The amount of solid core greater than 100mm expressed as percentage of core run.

Instrumentation

Where SPT has been carried out at beginning of core run, disturbed section of core excluded from SCR and RQD assessment.

If - fracture spacing - the average fracture spacing (mm) over the indicated length of core. Where spacing varies signficantly, the minimum,

average and maximum values are given. NI = non-intact core NA = not applicable

H Hand vane - direct reading in kPa - not corrected for BS1377 (1990). Re* denotes refusal

M Mackintosh probe - number of blows to achieve 100mm penetration

PP Pocket penetrometer - direct reading in kg/sq.cm

Vo Headspace vapour reading, uncorrected peak values in ppm, using a PID (calibrated with Isobutylene, using a 10.6eV bulb)

Sample type

Porous

tip

Perforated

standpipe

Doc. No. A01 Rev No. 14DC: JH

Logging

The logging of soils and rocks has been carried out in general accordance with BS 5930:1999 incorporating Amendments 1 (2006) & 2 (2010).Amendment 1 removes text superceded by BS ENO ISO 14688-1:2002, BS EN ISO 14688-2:2004 and BS EN ISO 14689-1:2003, and makesreference to the relevant standard for each affected sub clause. Amendment 2 removes text superceded by BS EN ISO 22475-1:2006 and makesreference to the relevant standard for each affected sub clause.

Chalk is logged in general accordance with Lord et al (2002) CIRIA C574. Where possible, dynamic samples in chalk have been logged inaccordance with CIRIA C574; descriptions and gradings should be treated with caution given the potential for sample disturbance.

For rocks the term fracture has been used to identify a mechanical break within the core. Where possible incipient and drilling induced fractures havebeen excluded from the assessment of fracture state. Where doubt exists, a note has been made in the descriptions. All fractures are considered tobe continuous unless otherwise reported.

Made Ground is readily identifiable when, within the material make up, man made constituents are evident. Where Made Ground appears to bereworked natural material the differentiation between in situ natural deposits and Made Ground is much more difficult to ascertain. The interpretationof Made Ground within the logs should therefore be treated with caution.

The descriptors "topsoil" and "tarmacadam" are used as generic terms and do not imply conformation to any particular standard or composition.

Bentonite

seal

Cement/

bentonite

grout

Stratum boundaries

KEY TO EXPLORATORY HOLE LOGS

General Comments

The process of drilling and sampling will inevitably lead to disturbance, mixing or loss of material in some soil and rocks.

Indicated water levels are those recorded during the process of drilling or excavating exploratory holes and may not represent standing water levels.

Legends are drawn in accordance with BS 5930:1999 incorporating Amendment 2.

All depths are measured along the axis of the borehole and are related to ground level at the point of entry.

Revision date: 01/07/13

(*250 - Where full test drive not completed, linearly extrapolated 'N' value reported, ** - Denotes no effective penetration)

0.40

0.50

1D* 0.40

Dry

Grass over brown slightly sandy gravelly SILT with high angular brick cobblecontent. Gravel is subangular and subrounded fine to coarse brick, ash, clinkerand flint with rare angular fine and medium gravel sized glass fragments. (MADEGROUND)

Dark brown gravelly sandy SILT. Gravel is angular to subrounded fine andmedium limestone, mudstone, ash and clinker. (MADE GROUND)

Trial pit completed at 0.50m.

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End Date


depth level

(m)legend

CONTRACT CHECKED

Notes

TRIAL PIT LOG

(m)

Start Date

water

record

sample/test

TP01SITE

GLOUCESTER CITY COUNCIL

0.50 m

29638EXPLORATORY HOLE LOGS SHOULD BE READ IN CONJUNCTION WITH KEY SHEETS

Sketch of Foundation - Not to scale. All dimensions in metres.

no/type

Trial pit excavated by hand.Groundwater not encountered.Trial pit sides remained stable and vertical.Trial pit dimensions 0.30x0.30x0.50m.On completion, the trial pit was backfilled with materials arising andturf reinstated.

15 July 2014

15 July 2014

CLIENT


depth (m)description

Sheet 1 of 1

Scale 1 : 6.25

result

Depth

NP

0.40

0.50

2D* 0.40

Dry

Grass over brown slightly sandy gravelly SILT with high angular brick cobblecontent. Gravel is subangular and subrounded fine to coarse brick, ash, clinkerand flint with rare angular fine and medium glass fragments. (MADE GROUND)

Dark brown gravelly sandy SILT with low angular and subangular brick cobblecontent. Gravel is angular to subrounded fine and medium limestone, mudstone,ash and clinker. (MADE GROUND)


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B

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End Date


depth level

(m)legend

CONTRACT CHECKED

Notes

TRIAL PIT LOG

(m)

Start Date

water

record

sample/test

TP02SITE


0.50 m



no/type


15 July 2014

15 July 2014

CLIENT



Sheet 1 of 1

Scale 1 : 6.25

result

Depth

NP

0.25

0.45

0.50

3D* 0.35

Dry

Grass over brown slightly sandy gravelly SILT with high angular brick cobblecontent. Gravel is subangular and subrounded fine to coarse brick, ash, clinkerand flint. (MADE GROUND)

Dark brown gravelly sandy SILT with low angular brick cobble content. Gravel isangular to subrounded fine and medium limestone, mudstone, ash, cement, brickand clinker. (MADE GROUND)

Firm dark greyish brown slightly gravelly CLAY. Gravel is subangular tosubrounded fine and medium ash, clinker and brick. (MADE GROUND)


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End Date


depth level

(m)legend

CONTRACT CHECKED

Notes

TRIAL PIT LOG

(m)

Start Date

water

record

sample/test

TP03SITE


0.50 m



no/type


15 July 2014

15 July 2014

CLIENT



Sheet 1 of 1

Scale 1 : 6.25

result

Depth

NP

0.35

0.50

4D* 0.40

Dry

Grass over brown slightly sandy gravelly SILT with medium angular brick cobblecontent. Gravel is subangular and subrounded fine to coarse brick, ash, clinkerand flint with frequent angular fine and medium glass fragments. (MADEGROUND)

0.30m: Plastic bags and old shoe

Dark brown gravelly sandy SILT with medium angular brick cobble content.Gravel is angular to subrounded fine and medium limestone, mudstone, ash andclinker. (MADE GROUND)


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End Date


depth level

(m)legend

CONTRACT CHECKED

Notes

TRIAL PIT LOG

(m)

Start Date

water

record

sample/test

TP04SITE


0.50 m



no/type


15 July 2014

15 July 2014

CLIENT



Sheet 1 of 1

Scale 1 : 6.25

result

Depth

NP

0.40

0.50

5D* 0.45

Dry

Grass over brown slightly sandy gravelly SILT with medium angular brick cobblecontent. Gravel is subangular and subrounded fine to coarse brick, ash, clinkerand flint. (MADE GROUND)

0.35m: Large plastic toy car.

Dark brown gravelly sandy SILT. Gravel is angular to subrounded fine andmedium mudstone, mudstone, ash and clinker. (MADE GROUND)


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End Date


depth level

(m)legend

CONTRACT CHECKED

Notes

TRIAL PIT LOG

(m)

Start Date

water

record

sample/test

TP05SITE


0.50 m



no/type


15 July 2014

15 July 2014

CLIENT



Sheet 1 of 1

Scale 1 : 6.25

result

Depth

NP

0.35

0.50

6D* 0.45

Dry

Grass over brown slightly sandy gravelly SILT with high angular brick cobblecontent. Gravel is subangular and subrounded fine to coarse brick, ash, clinkerand flint with rare angular fine to coarse glass fragments. (MADE GROUND)

Dark brown with orangish brown gravelly sandy SILT with low angular brickcobble content. Gravel is angular to subrounded fine and medium crystalline,mudstone, ash and clinker. (MADE GROUND)


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End Date


depth level

(m)legend

CONTRACT CHECKED

Notes

TRIAL PIT LOG

(m)

Start Date

water

record

sample/test

TP06SITE


0.50 m



no/type


15 July 2014

15 July 2014

CLIENT



Sheet 1 of 1

Scale 1 : 6.25

result

Depth

NP

0.45

0.507D* 0.50Dry

Grass over orangish brown slightly sandy gravelly SILT with high angular brickand concrete cobbles. Gravel is subangular and subrounded fine to coarse brick,ash, clinker and flint with frequent angular fine to coarse glass and potteryfragments. (MADE GROUND)

Dark brown with orangish brown gravelly silty SAND with low subangular brickcobble content. Gravel is angular to subrounded fine and medium limestone,mudstone, ash and clinker. (MADE GROUND)


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End Date


depth level

(m)legend

CONTRACT CHECKED

Notes

TRIAL PIT LOG

(m)

Start Date

water

record

sample/test

TP07SITE


0.50 m



no/type


15 July 2014

15 July 2014

CLIENT



Sheet 1 of 1

Scale 1 : 6.25

result

Depth

NP

CHEMICAL ANALYSES

2963

8Geotechnical Engineering Limited

APPENDIX B

Chemtest Ltd.

Depot Road

Newmarket

CB8 0AL

Tel: 01638 606070

Email: [email protected]

Report Number: 14-06031 Issue-1

Initial Date of Issue: 23-Jul-14

Client: Geotechnical Engineering Ltd

Client Address: Centurion House

Olympus Park

Quedgeley

Gloucester

Gloucestershire

GL2 4NF

Contact(s): Neil Parry

Client Reference:

Quotation No.: Date Received: 17-Jul-14

Order No.: Date Instructed: 17-Jul-14

No. of Samples: 7 Results Due: 23-Jul-14

Turnaround:

(Weekdays)5

Date Approved: 23-Jul-14

Approved By:

Details: Keith Jones, Technical Manager

Final Report

29638- Westgate Park

The results reported herein relate only to the material supplied to the laboratory.

This certificate shall not be reproduced except in full, without the prior written approval of the laboratory.

Page 1 of 4

Results Summary - Soil

Report No.: 14-06031 Issue-1

Project: 29638- Westgate Park

Client: Geotechnical Engineering Ltd 30695 30696 30697 30698 30699 30700 30701

Quote:

Order No.: TP01 TP02 TP03 TP04 TP05 TP06 TP07

SOIL SOIL SOIL SOIL SOIL SOIL SOIL

0.4 0.4 0.35 0.40 0.45 0.45 0.50

15-Jul-14 15-Jul-14 15-Jul-14 15-Jul-14 15-Jul-14 15-Jul-14 15-Jul-14

Determinand Accred. SOP Units LOD

ACM Type U 2192 - - - - - - -

Asbestos Identification U 2192 % 0.001No Asbestos

Detected

No Asbestos

Detected

No Asbestos

Detected

No Asbestos

Detected

No Asbestos

Detected

No Asbestos

Detected

No Asbestos

Detected

Moisture N 2030 % 0.02 9.4 7.0 12 20 20 11 8.4

Stones N 2030 % 0.02 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020 < 0.020

pH M 2010 8.2 8.2 8.2 8.0 8.1 8.2 8.2

Boron (Hot Water Soluble) M 2120 mg/kg 0.4 1.5 1.0 1.1 4.8 3.3 1.9 1.0

Sulphate (2:1 Water Soluble) as SO4 M 2120 g/L 0.01 0.028 0.084 0.010 0.12 0.076 < 0.010 0.15

Cyanide (Total) M 2300 mg/kg 0.5 < 0.50 < 0.50 < 0.50 < 0.50 < 0.50 < 0.50 < 0.50

Arsenic M 2450 mg/kg 2 17 11 21 51 40 40 19

Beryllium M 2450 mg/kg 0.1 3.4 0.49 2.4 11 9.1 3.6 6.8

Cadmium M 2450 mg/kg 0.1 2.0 0.25 2.1 1.6 1.2 0.69 0.98

Chromium M 2450 mg/kg 5 31 13 28 66 37 23 39

Copper M 2450 mg/kg 5 220 12 38 580 100 88 57

Mercury M 2450 mg/kg 0.1 0.32 < 0.10 0.43 6.2 0.58 0.10 2.2

Nickel M 2450 mg/kg 5 < 5.0 < 5.0 < 5.0 74 34 9.5 < 5.0

Lead M 2450 mg/kg 5 180 43 420 3400 930 130 500

Selenium M 2450 mg/kg 0.2 < 0.20 < 0.20 0.41 0.94 0.44 0.98 < 0.20

Vanadium M 2450 mg/kg 5 42 12 33 51 44 33 40

Zinc M 2450 mg/kg 5 130 41 150 620 450 120 170

Chromium (Trivalent) N 2490 mg/kg 0.5 31 13 28 66 37 23 39

Chromium (Hexavalent) N 2490 mg/kg 0.5 < 0.50 < 0.50 < 0.50 < 0.50 < 0.50 < 0.50 < 0.50

Naphthalene N 2700 mg/kg 0.01 0.46 < 0.010 0.080 < 0.010 < 0.010 < 0.010 < 0.010

Acenaphthylene N 2700 mg/kg 0.01 1.8 < 0.010 0.34 < 0.010 < 0.010 < 0.010 < 0.010

Acenaphthene N 2700 mg/kg 0.01 2.1 < 0.010 0.45 < 0.010 < 0.010 < 0.010 < 0.010

Fluorene N 2700 mg/kg 0.01 2.2 < 0.010 0.56 < 0.010 < 0.010 < 0.010 < 0.010

Phenanthrene N 2700 mg/kg 0.01 19 0.83 5.8 1.3 1.3 < 0.010 1.5

Anthracene N 2700 mg/kg 0.01 6.3 0.16 1.5 0.29 0.20 < 0.010 0.59

Fluoranthene N 2700 mg/kg 0.01 42 2.3 8.3 3.0 2.0 0.96 2.8

Pyrene N 2700 mg/kg 0.01 45 1.6 7.5 3.0 1.9 1.1 3.1

Benzo[a]anthracene N 2700 mg/kg 0.01 20 0.80 3.6 2.5 0.97 0.55 1.4

Chrysene N 2700 mg/kg 0.01 21 0.97 4.4 3.0 1.9 0.82 1.8

Benzo[b]fluoranthene N 2700 mg/kg 0.01 25 < 0.010 4.4 3.1 1.5 < 0.010 2.4

Top Depth (m):

Bottom Depth(m):

Date Sampled:

Chemtest Sample ID.:

Client Sample Ref.:

Client Sample ID.:

Sample Type:

Page 2 of 4

Results Summary - Soil

Report No.: 14-06031 Issue-1

Project: 29638- Westgate Park

Client: Geotechnical Engineering Ltd 30695 30696 30697 30698 30699 30700 30701

Quote:

Order No.: TP01 TP02 TP03 TP04 TP05 TP06 TP07

SOIL SOIL SOIL SOIL SOIL SOIL SOIL

0.4 0.4 0.35 0.40 0.45 0.45 0.50

15-Jul-14 15-Jul-14 15-Jul-14 15-Jul-14 15-Jul-14 15-Jul-14 15-Jul-14

Determinand Accred. SOP Units LOD

Top Depth (m):

Bottom Depth(m):

Date Sampled:

Chemtest Sample ID.:

Client Sample Ref.:

Client Sample ID.:

Sample Type:

Benzo[k]fluoranthene N 2700 mg/kg 0.01 11 < 0.010 1.7 1.9 1.2 < 0.010 0.94

Benzo[a]pyrene N 2700 mg/kg 0.01 22 < 0.010 3.4 2.0 0.87 < 0.010 1.8

Indeno(1,2,3-c,d)Pyrene N 2700 mg/kg 0.01 18 < 0.010 2.8 1.6 < 0.010 < 0.010 1.3

Dibenz(a,h)Anthracene N 2700 mg/kg 0.01 5.2 < 0.010 1.2 0.11 < 0.010 < 0.010 0.060

Benzo[g,h,i]perylene N 2700 mg/kg 0.01 16 < 0.010 2.3 1.7 < 0.010 < 0.010 1.9

Total Of 16 PAH's N 2700 mg/kg 0.2 260 6.7 48 24 12 3.4 20

Total Phenols M 2920 mg/kg 0.3 < 0.30 < 0.30 < 0.30 < 0.30 < 0.30 < 0.30 < 0.30

Page 3 of 4

Report Information

Key

U UKAS accredited

M MCERTS and UKAS accredited

N Unaccredited

S This analysis has been subcontracted to a UKAS accredited laboratory that is accredited for this analysis

SN This analysis has been subcontracted to a UKAS accredited laboratory that is not accredited for this analysis

T This analysis has been subcontracted to an unaccredited laboratory

I/S Insufficient Sample

U/S Unsuitable sample

N/E not evaluated

< "less than"

> "greater than"

Comments or interpretations are beyond the scope of UKAS accreditation

The results relate only to the items tested

Uncertainty of measurement for the determinands tested are available upon request

None of the results in this report have been recovery corrected

All results are expressed on a dry weight basis

The following tests were analysed on samples as received and the results subsequently corrected to a dry

weight basis TPH, BTEX, VOCs, SVCOs, PCBs, Phenols

For all other tests the samples were dried at < 37°C prior to analysis

All Asbestos testing is performed at our Coventry laboratory

Issue numbers are sequential starting with 1 all subsequent reports are incremented by 1

Sample Deviation Codes

A - Date of sampling not supplied

B - Sample age exceeds stability time (sampling to extraction)

C - Sample not received in appropriate containers

Sample Retention and Disposal

All soil samples will be retained for a period of 1 month following the date of the test report

All water samples will be retained for 7 days following the date of the test report

Charges may apply to extended sample storage

If you require extended retention of samples, please email your requirements to:

[email protected]

Page 4 of 4

mailto:[email protected]

Documents

FACTUAL REPORT ON GROUND INVESTIGATION …planningdocs.gloucester.gov.uk/webcache/81D390/81D... · ISO 14688-1:2002, BS EN ISO 14688-2:2004 and BS EN ISO 14689-1:2003, and makes reference