GROUND INVESTIGATION REPORT LAND ADJACENT TO REDDITCH ROAD DOCUMENT VERIFICATION 1 Lancaster Circus Birmingham B4 7DG Tel 0121 303 6967 Project Number 72765 File Reference 54696 Revision Date Status Prepared by Checked by Approved by 0000 September 2011 Final RJM
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GROUND INVESTIGATION REPORT
LAND ADJACENT TO REDDITCH ROAD
DOCUMENT VERIFICATION
1 Lancaster Circus
Birmingham B4 7DG
Tel 0121 303 6967
Project Number 72765 File Reference 54696
Revision Date Status Prepared by Checked by Approved by
0000 September 2011 Final RJM
2
Our Ref: 72765/54696 Your Ref:
Birmingham City Council Housing Regeneration and Development Team Homes and Neighbourhoods Directive 44 Newhall Street Birmingham B3 3PL
September 2011 For the attention of Bali Paddock
GROUND INVESTIGATION REPORT LAND ADJACENT TO REDDITCH ROAD
CONTENTS Executive Summary 1.0 Introduction 1.1 Authorisation 1.2 Aims and Objectives 1.3 Scope of Work
3.4 Laboratory Testing 4.0 Evaluation and Interpretation of Recovered Data 4.1 In-situ Testing 4.2 Laboratory Test Results
5.0 Remediation 5.1 Options Appraisal 5.2 Health and Safety
ENCLOSURES 1.0 Site Investigation Data 1a Exploratory Hole Location Plan 1b Borehole Logsheets 1c Trial Pit Logsheets 1d Key to Symbols and Disposal of Samples 1e Results of In-situ Gas Testing 1f Laboratory Test Results
GROUND INVESTIGATION REPORT - LAND ADJACENT TO REDDITCH ROAD
054696 September 2011 Revision 0000 3 Draft Issue
EXECUTIVE SUMMARY A previous desk top study of the area had identified that prefabricated housing was
once present, fronting onto Redditch Road. A depression in the ground was also
identified in the area. This feature contained a pond and was infilled in the 1960s when
the “prefabs” were demolished. Land was redeveloped with low rise residential
properties and areas of Public Open Space. The type of prefabricated structure was not
known and it had been concluded that there was a potential risk for there to be
asbestos or asbestos containing material caused by demolition of the “prefabs”.
The current investigation has shown up to 5.0m of made ground at the deepest point of
infilling found within the former depression/pond area. Materials used in backfilling this
feature included disturbed natural ground and demolition waste (mainly brick and
concrete). In some instances the ground was voided or very loose beneath a relatively
solid crust, suggesting that the materials had been poorly compacted and/or settlement
had occurred.
Tests have shown no evidence of generation of high levels of ground gases in this
infilled area. Carbon dioxide levels in the ground have on one occasion exceeded long
term Occupational Exposure Levels. This gas was at a concentration that is frequently
recorded in natural soils, with the implication being that should there ever be excavation
in this area then tests for hazardous gases would have to be carried out before entry
into confined space below ground level (this is being standard procedure).
Elsewhere made ground was also found on land on and near to where there had been
prefabricated houses. This comprised compact disturbed natural ground with some
demolition waste.
There was no visual evidence of asbestos or asbestos containing materials during
drilling of boreholes and excavation of trial pits. Examination of soil samples under a
microscope showed a very small amount of brown asbestos fibre at once location and
white asbestos fibre at another. Further more detailed analysis was carried out and has
confirmed that the amount of asbestos present was below that where there would be a
GROUND INVESTIGATION REPORT - LAND ADJACENT TO REDDITCH ROAD
054696 September 2011 Revision 0000 4 Draft Issue
risk of generating a significant amount of airborne fibres should the ground be
disturbed. These results indicate that the prefabricated structures that were demolished
were not the type that contained a high amount of asbestos.
Tests for chemical contamination in both the former depression and “prefab” area
showed levels that would not warrant and remediation for current end use or a less
sensitive future use. The levels of contamination would require reassessment should
there ever be a change to a more sensitive end use such as housing, as there may be
a need to incorporate basic remedial measures such as using a soil cover in garden
areas.
GROUND INVESTIGATION REPORT - LAND ADJACENT TO REDDITCH ROAD
054696 September 2011 Revision 0000 5 Draft Issue
1.0 INTRODUCTION
1.1 AUTHORISATION
The investigation was requested by the Housing Regeneration and Development
Team, part of Birmingham City Council’s (herein referred to as BCC’s) Homes
and Neighbourhoods Directive.
1.2 AIMS AND OBJECTIVES
The main aim of the investigation was to investigate the potential for
contamination to be present that was associated with the demolition of the
prefabricated houses and the infilling of a depression that includes a pond.
The Ordnance Survey Grid Reference for the site is E.404280, N.277930.
1.3 SCOPE OF WORK
The current investigation has included the following elements:
Desk Study
• An overview of a previous report that was a summary of ground conditions
in the area.
Geoenvironmental Investigation
• The excavation of hand dug trail pits on and near the line of former
prefabricated housing.
• The sinking of boreholes to investigate the materials use to infill the
former depression/pond.
• In-situ testing involving the measurement of ground gases accumulating in
monitoring standpipes installed in the former depression/pond.
GROUND INVESTIGATION REPORT - LAND ADJACENT TO REDDITCH ROAD
054696 September 2011 Revision 0000 6 Draft Issue
• Sampling exercise to recover materials for inspection and laboratory
testing.
• Targeted laboratory chemical testing
• Factual and interpretive Reporting.
• Consideration of Remedial Measures
• Consider Health and Safety Measures for existing and future users of the
land.
2.0 DESK STUDY
2.1 Overview
Reference is made to a previous report produced by Urban Design for the
existing client entitled “Summary of Existing Ground Conditions” Ref
SI/11/054680, dated April 2011:
This identified the presence of prefabricated housing adjacent to Redditch Road,
built by 1947 and demolished by 1965. Records held by BCC’s Environmental
Protection Unit indicated the presence of a potential landfill nearby. Scrutiny of
available mapping showed that this position was incorrectly plotted and that it
should have related to a former depression in the ground with a pond that was
shown on early OS maps. These features were infilled when the land was
redeveloped in the 1960s. Flats that are currently at 210 and 220 Redditch Road
were shown as being built near or over the edge of this feature.
Potential contamination indentified in this earlier report was demolition waste and
unknown materials used to infill the depression. This included asbestos or
asbestos containing materials from demolition of prefabricated houses.
There was also a potential for generation of landfill-type gases if degradable
material was present in the former pond/depression (including pond sediment).
A previous investigation had included a borehole in the former pond showing
3.7m of demolition waste. However the depth and extent of infilling and the full
GROUND INVESTIGATION REPORT - LAND ADJACENT TO REDDITCH ROAD
054696 September 2011 Revision 0000 7 Draft Issue
nature of materials present was unproven. In addition no ground gas testing had
been carried out.
3.0 INTRUSIVE INVESTIGATION
3.1 Field Investigation
The site works for the current investigation was carried out on the 22nd
June
2011 and comprised 4 window sample boreholes in the area of the former
pond/depression and 6 hand excavated trial pits on and near the line of the
former prefabricated houses. The positions of the exploratory holes are shown
on the enclosed plan (enc 1a).
The strata encountered were logged by the site engineer. The recovered
information forms the basis of the borehole log sheets and records that are
presented in enclosures of this report (enc 1b and 1c). A key to symbols and
information on disposal of samples is present in enclosure 1d.
Representative samples of soils were recovered for further examination and
laboratory testing, as deemed necessary.
3.2 Encountered Conditions
Boreholes showed a thin layer of topsoil with up to 5.0m of made ground in the
infilled depression/pond area, comprising disturbed natural ground with some
demolition waste (mainly brick and concrete).
Two boreholes in the deepest area of infilling showed evidence of voids or
extremely loosely compacted material within the made ground. In WS1 this was
from 3.0-4.0m and in WS3 this was from 2.0-2.8m and 3.0-4.8m.
Beneath the fill materials natural ground comprised stiff clay or hard mudstone.
GROUND INVESTIGATION REPORT - LAND ADJACENT TO REDDITCH ROAD
054696 September 2011 Revision 0000 8 Draft Issue
Groundwater was only encountered in one borehole (WS1) at 3.5m. A ground
gas monitoring standpipe was installed at this location.
Hand dug trial pits on the line of and adjacent to the former prefabricated houses
also showed nominal depths of topsoil. Made ground was encountered at all
locations to the base of the excavations, comprising disturbed natural ground,
sand, bricks (including layers of whole brick), varying amounts of clayey silt and
occasional glass and wood. At one location (TPC) sandy ash was also present in
the made ground from 0.15-0.48m.
Although it had bee planned to excavate boreholes to a depth of 1m, the ground
was extremely compact and all but one hand excavated trial pit had to be
abandoned before the predetermined depth due to the hard strata.
Groundwater was not encountered during hand digging.
3.3 In-situ Gas Testing
The standpipe installed on the site has been monitored on two occasions.
The first visit was carried out approximately two weeks after installation during a
high pressure period. As emission of ground gases is likely to be greater during
low or rapidly falling atmospheric pressure the second reading was delayed until
the atmospheric pressure was falling and below 1000mb. This event occurred
on 12th
September 2011, when a storm caused by the tail end of Hurricane Katia
crossed the UK.
Results of in-situ gas testing are present in the enclosure to this report (enc 1e)
3.4 Laboratory Testing
Asbestos identification was carried out on samples deemed to be representative of
the strata present.
GROUND INVESTIGATION REPORT - LAND ADJACENT TO REDDITCH ROAD
054696 September 2011 Revision 0000 9 Draft Issue
Samples were also submitted for a range of tests to include the potential chemical
contaminants associated with demolition waste and ash.
Results of laboratory testing as presented in enclosure 1f to this report.
4.0 Evaluation and Interpretation of Recovered Data
Old maps show that prefabricated houses were once present on land adjacent to
the Redditch Road. It is not known what type of “prefabs” these were, and the
concern was that they might have been those that contained a significant amount
of asbestos, with contaminated arising from their demolition.
Early OS maps also showed the presence of a depression in the ground with an
associated pond that was infilled around the time of demolition of the “prefabs”. It
was expected that the greatest depth of made ground would be present where the
pond was located in the depression and this has been confirmed by the current
investigation, with up to 5.0m of fill materials being recorded.
The materials used to backfill the former depression/pond comprise a mixture of
disturbed natural ground with some demolition waste and there is evidence that
they were poorly compacted as voids/very loose material are present below a solid
crust at some locations. The properties at 220 Redditch Road may have been built
over the edge of the infilled ground and whilst limited investigation was carried out
in this area before the flats were built, it is not known whether the foundation
design allowed for this.
Elsewhere had dug trial pits have also shown the presence of demolition waste
intermixed with disturbed natural ground. There was no visual evidence of
significant amounts of asbestos or asbestos containing materials during site works
for the current investigation.
GROUND INVESTIGATION REPORT - LAND ADJACENT TO REDDITCH ROAD
054696 September 2011 Revision 0000 10 Draft Issue
4.1 In-situ Test Results
Tests carried out in the infilled depression/ponds area included the
measurement of methane and carbon dioxide levels in a monitoring standpipe
(these are gases produced by anaerobic degradation).
No measurable levels of methane were recorded on either occasion and the
highest level of carbon dioxide was 1.4%.
Measurement of oxygen concentrations showed the lowest level to be 18.8%.
No significant pressures and flow rates were recorded from gases accumulating
in the borehole.
These results include measurements taken under “worse-case” conditions when
the atmospheric was low and rapidly falling.
It is concluded that materials encountered in the former depression/pond area do
not have the potential to produce significant amounts of landfill–type gases.
4.2 Laboratory Test Results
Samples deemed representative of ground conditions were screened by stereo
microscopic examination prior to sample preparation and chemical analysis.
This examination was more detailed than field observations a showed suspect
loose fibre(s) in two samples.
In the sample from Trial Pit A amosite (brown asbestos) was identified as loose
fibre(s) in the soil matrix.
In the sample from Trial Pit C chrysotile (white asbestos) was identified as loose
fibre(s) in the soil matrix.
GROUND INVESTIGATION REPORT - LAND ADJACENT TO REDDITCH ROAD
054696 September 2011 Revision 0000 11 Draft Issue
The type of examination carried out is a qualitative test, in so much as suspect
material is identified. It does not give an indication of how the soil would be
classified if it contained asbestos (e.g. if it were hazardous waste) or the relative
risk depending on how much asbestos was present.
The results prompted further specialised analysis with samples where asbestos
was identified sent off for quantification using a technique called Phase Contrast
Optical Microscopy (PCOM). Results of this additional testing showed the
asbestos to be present in both samples at concentrations of less than 0.001%w/w.
This shows asbestos is below the World Health Organisation limit at which
airborne concentrations of asbestos fibres would reach or exceed 0.1fibres/millitre
of air (ref WHO TM/88/14). The risk from asbestos would therefore be considered
as low. These results indicate that the prefabricated structures that were
demolished were not the type that contained a high amount of asbestos.
Other tests for chemical contamination have been assessed with reference to WS
Atkins ATRISKSOIL
Soil Screening Values (SSVs) and Environment Agency Soil
Guideline Values (SVGs) for long-term human health risk.
Birmingham City Council as a subscriber to www.atrisksoil.co.uk has access to
the full set of SSVs. However, strict copyright laws control reproduction of these
values. Tables of values of SSVs are therefore not reproduced in this report to
avoid unrestricted copying but are available for inspection if required.
The Environment Agency SVGs have been withdrawn but it is noted that many
organisations including WS Atkins and Local Authorities such as BCC still
consider certain SGVs to offer the most appropriate guideline value for soil
contamination.
In this instance the screening values for Public Open Spaces are considered the
most applicable.
GROUND INVESTIGATION REPORT - LAND ADJACENT TO REDDITCH ROAD
054696 September 2011 Revision 0000 12 Draft Issue
Laboratory testing has shown no significant levels of chemical contamination.
5.0 Remediation
5.1 Options Appraisal
The main aim of the investigation was to investigate potential contamination at
the site.
In this instance although asbestos was detected in two samples the levels are so
low as to not be considered a risk from air borne fibres. Low levels of chemical
contamination or ground gases have been detected and specific remediation is
not considered necessary whilst the land remains in use as public open space.
Should future use change then it will be necessary to re-evaluate findings. For a
more sensitive land use, such as gardens for residential use, the levels of
chemical contamination might warrant measures such as the use of a clean soil
cover. For less sensitive uses (e.g. commercial or hard cover) then no specific
remediation would be necessary.
The presence of poorly compacted/voided material in the former pond area may
require some form of ground improvement (e.g. excavation and re-compaction)
should there be a change of use; particularly should there be an increase in
loading over the former pond area.
If it is intended to keep existing properties at 220 Redditch Road then they
should be inspected for structural damage, as they appear to be built on the
edge of the infilled area and are potentially susceptible to differential settlement.
5.2 Health and Safety
The levels of asbestos where discrete fibres were encountered were below that
where a significant amount of airborne fibres could be released if the ground
GROUND INVESTIGATION REPORT - LAND ADJACENT TO REDDITCH ROAD
054696 September 2011 Revision 0000 13 Draft Issue
were disturbed. However, as it is not possible to test every bit of ground it is
recommended that dust suppression be used if there was ever any
redevelopment that included ground works, in case there was very localised
asbestos contamination.
No specific measures would be considered necessary to protect site workers
from chemical contamination other than standard clean working practices being
adopted which includes the provision of PPE (e.g. gloves) and welfare facilities.
The levels of carbon dioxide recorded in the monitoring borehole were on one
occasion above Occupational Exposure Levels for long term exposure. Should
there ever be excavation in the area then no confined space should be entered
below ground level until the atmosphere is proven safe.
GROUND INVESTIGATION REPORT - LAND ADJACENT TO REDDITCH ROAD
054696 September 2011 Revision 0000 14 Draft Issue
ENCLOSURE 1.0
Site Investigation Data
1a Exploratory Hole Location Plan
1b Borehole Logsheets
1c Trial Pit Logsheets
1d Key to Symbols and Disposal of Samples
1e Results of In-situ Gas Testing
1f Laboratory Test Results
Shelter
25
REDDIT
CH R
OAD
TE
RN
GR
OV
E
RED
DIT
CH R
OAD
11
18
1
10
23
22
11
23
32
36
38
30
WA
NS
BE
CK
GR
OV
E
161.5m
LB
15
14
28
24
34
12
33
20
26
2
195
180
12
El Sub Sta
25
15
174
4
40
41
DRIVEGROVEWOOD
Surgery
33
44
5
38
1115
69
GROVEWOOD DRIVE
16
19
12
1
10
1814
9
BURFORD PARK ROAD
17
23
43
GR
OVE
WO
OD
DR
IVE
CROFTW
HITEBEAM
WH
ITE
BEA
M
31
42
46
52
11
23
15
MULLION CROFT
30
Coleman Court
74
1
2
31
42
165.8m
35
18
GR
OV
E
26
27
4
CR
OFT
41
230
26
Grange
37
11
26
15
1
11
40
Sta
19
23
23
15
12
2
15
11
8
11
14 31
59
14
21
6
26
3
10
28
27
38
200
37
50
14
210
15
26
Sub
3323
18
35
38
39
24
40
29
21
6
11
15
26
1
36
1
Norton
2
17
220
30
47
15
37
24
2
29
1
El
15
10
10
11
21
14
24
15
G
BU
RFO
RD
PAR
K R
OAD
TE
RN
WA
NS
BE
CK
GR
OV
E
BEECH HURST
FO
RTH
GR
OVE
DEE G
RO
VE
REDDITCH R
OAD
VY
RN
WY
GR
OV
E
TCB
Shelter
172.2m
172.8m
WS1WS2
WS3
WS4
TPA
TPB
TPC
TPD
TPE
TPF
IRL Site Investigation1 Lancaster Circus Birmingham B4 7DG
Tel 0121 303 6967Fax 0121 303 7501
Project
Date Engineer
Land Adjacent To
Redditch Road
7 2 9 1 6 / 5 4 6 9 2
July 2011 DPL
EXPLORATORY HOLE LOCATION PLANMap based on 2007 Landline & Mastermap data
From To Time RemarksHand Dug Inspection pit to 1.2m.1.2. Groundwater encountered at 3.5m. .
72916
Homes and Neighbourhoods Directorate
Land Adjacent to Redditch Road
54675 JT
Compact Premier Tracker
22/06/2011
DL
Window Sampler
404241E - 277851N
-
Record of Borehole WS1
0.00-0.050.05-0.70
0.70-0.90
1.20-2.00
4.00-4.90
D 1D 2
D 3
D 4
D 5
0.05
(0.65)
0.70
0.90
(2.10)
3.00
(1.00)
4.00
(0.90)
4.90
5.00
TOPSOIL
MADE GROUND - Dense brown sand, somebrick and fine to coarse subrounded quartzitegravel
MADE GROUND - Dense black ashy sand. somecrushed gravel (Type 1 road stone).
MADE GROUND - Soft orange brown and greyclay.
No Recovery (VOID)
MADE GROUND - Soft brown silty clay(possible natural ground).
MUDSTONE - Hard red brown MUDSTONE
End of Borehole at 5.00 m
Sheet 1 of 1
Description
Logged By:
Boring Method:
Driller:
Client:
Project No:
Site:
Type No Test Results
Strata Details
Legend
Samples & In-Situ Tests
Depth
General Remarks:
Ground Level:
Co-ords:
Dates:
Elevation
1 Lancaster Circus Birmingham B4 7DG
Tel 0121 303 6967 Fax 0121 303 7501
Well/Waterstrikes
Job No:
Depth(Thickness)Date & Casing
Boring
Casing
Depth DiameterPlant: Diameters
Chiselling
From To Time RemarksHand Dug Inspection Pit to 1.2m.1.2. Groundwater not encountered.
72916
Homes and Neighbourhoods Directorate
Land Adjacent to Redditch Road
54675 LT
Compact Premier Tracker
22/06/2011
DL
Window Sampler
404247E - 277855N
-
Record of Borehole WS2
0.00-0.050.05-0.50
0.50-1.20
1.20-3.00
D 1D 2
D 3
D 4
0.05
(0.45)
0.50
(0.70)
1.20
(1.80)
3.00
TOPSOIL
MADE GROUND - Dense brown sand, somebrick, fine to coarse subangular gravel,broken brick and concrete fragments.
MADE GROUND - medium dense dark brownclayey sand, some fine to coarsesubangular to sub rounded quartzite graveland brick fragments.
Stiff red brown friable CLAY
End of Borehole at 3.00 m
Sheet 1 of 1
Description
Logged By:
Boring Method:
Driller:
Client:
Project No:
Site:
Type No Test Results
Strata Details
Legend
Samples & In-Situ Tests
Depth
General Remarks:
Ground Level:
Co-ords:
Dates:
Elevation
1 Lancaster Circus Birmingham B4 7DG
Tel 0121 303 6967 Fax 0121 303 7501
Well/Waterstrikes
Job No:
Depth(Thickness)Date & Casing
Boring
Casing
Depth DiameterPlant: Diameters
Chiselling
From To Time RemarksHand dug inspection pit to 1.2m.!.2. Groundwater not encountered.3. Monitoring pipe installed to 3.0m.
72916
Homes and Neighbourhoods Directorate
Land Adjacent to Redditch Road
54675 JT
Compact Premier Tracker
22/06/2011
DL
Window Sampler
404237E - 277846N
-
Record of Borehole WS3
0.50-2.00
2.80-3.00
4.80-5.00
5.00-5.10
D 1
D 2
D 3
D 4
0.05
(0.45)
0.50
(1.50)
2.00
(0.80)
2.80
3.00
(1.80)
4.80
5.00
5.10
TOPSOIL
MADE GROUND - Coarse gravel (Type 1 roadstone).
MADE GROUND - firm red brown clay, somebroken brick and concrete (Poor recovery).
No recovery (VOID)
MADE GROUND - Grey siltt (Poor recovery).
No recovery (VOID)
MADE GROUND - soft to firm red brownsiltyclay, some brick fragments.
Stiff red brown CLAY
End of Borehole at 5.10 m
Sheet 1 of 1
Description
Logged By:
Boring Method:
Driller:
Client:
Project No:
Site:
Type No Test Results
Strata Details
Legend
Samples & In-Situ Tests
Depth
General Remarks:
Ground Level:
Co-ords:
Dates:
Elevation
1 Lancaster Circus Birmingham B4 7DG
Tel 0121 303 6967 Fax 0121 303 7501
Well/Waterstrikes
Job No:
Depth(Thickness)Date & Casing
Boring
Casing
Depth DiameterPlant: Diameters
Chiselling
From To Time RemarksHand dug inspection pit to 1.2m.1.2. Groundwater not encountered.3. Monitoring standpipe installed to 5m.
72916
Homes and Neighbourhoods Directorate
Land Adjacent to Redditch Road
54675
Compact Premeier Tracker
22/06/2011
Window Sampler
404232E - 277839N
-
Record of Borehole WS4
0.10-0.50
0.90-1.20
D 1
D 2
0.05
(0.65)
0.70
0.90
(0.80)
1.70
(1.20)
2.90
(2.10)
5.00
TOPSOIL
MADE GROUND - Firm red brown clay, somebrick fragments and fine to coarse subangular to sub rounded gravel.
MADE GROUND - Black ash
MADE GROUND - Firm red brown clay, somebrick fragments and fine to coarse subangular to sub rounded gravel.
Firm red brown and grey CLAY (Possiblydisturbed).
Firm grey CLAY become stiff with depth.
End of Borehole at 5.00 m
Sheet 1 of 1
Project No. 72916
Job Tiltle Land Adjacent to Redditch Road
Site works undertaken - 23.07.11
TP ref Top of Strata (m) Base of Strata (m) Description Sample Ref and Depth (m)
A GL 0.05 MADE GROUND - Topsoil
0.05 0.15
MADE GROUND - Red brown friable silty clay, with gravel, coal and brick
fragments. D1 0.15 - 0.45
0.15 0.3
MADE GROUND - Red brown friable silty clay, with gravel, coal and brick
fragments.
0.3 0.4 MADE GROUND - Whole bricks
0.4 0.45 MADE GROUND - Red brown friable silty clay
0.45 0.55+
MADE GROUND - Hard red brown friable clay, occasional coal, gravel and
brick fragments.
Note Trial pit A abandoned due to hard strata
B GL 0.05 MADE GROUND - Topsoil
0.05 0.15 MADE GROUND - Red brown friable clayey silt D1 0.15 - 0.45
0.15 0.45
MADE GROUND - Brown silty clay, occassional gravel, glass and brick
fragments.
0.45 0.55 MADE GROUND - Whole bricks
0.55 0.75 MADE GROUND -Soft brown clay, occasinal brick and gravel
0.75 1.0+ Stiff to hard red brown CLAY (possibly disturbed)
C GL 0.05 MADE GROUND - Topsoil
0.05 0.15 MADE GROUND - Red brown friable clayey silt D1 0.15 - 0.48
0.15 0.48
MADE GROUND - Grey clay, some black sandy ash, wood fragments and
gravel.
0.48 0.7+
MADE GROUND - Hard brown silty clay, occasional brick, ash and timber.
Note Trial pit C abandoned due to hard strata
D GL 0.05 MADE GROUND - Topsoil
0.05 0.1 MADE GROUND - Red brown clayey silt D1 0.10 - 0.55
0.1 0.25
MADE GROUND - Red brown clayey silt, much gravel, brick and coal
fragments.
0.25 0.35
MADE GROUND - Brown clayey silt, occasional gravel, brick and
concrete.
0.35 0.55
MADE GROUND - Dark grey brown sand, some brown clayey silt,
occasional gravel and brick fragments. brown friable silty clay
0.55 0.95+
MADE GROUND - Brown clayey silt, much brick, gravel and concrete
gragments.
E GL 0.05 MADE GROUND - Topsoil
0.05 0.5
MADE GROUND - Dark brown friable sand some whole brick and broken
brick fragments. D1 0.15 - 0.45
0.5 0.75+ MADE GROUND - Whole bricks
Note Trial pit E abandoned due to hard strata
F GL 0.05 MADE GROUND - Topsoil
0.05 0.19
MADE GROUND - Brown silty sand, some gravel, brick, concrete and
glass fragments D1 0.05 - 0.5
0.19 0.3 MADE GROUND - Concrete and brick
0.3 0.5 MADE GROUND - Red silty sand, some brick fragments.
0.5 0.8 MADE GROUND - Red brown friable clay, some brick fragments
0.8 0.9+ Hard red brown friable CLAY (possibly disturbed)
Record of Hand Dug Trial Pits
Enclosure 1d
URBAN DESIGN IRL SITE INVESTIGATION
KEY TO SYMBOLS IN BOREHOLE LOGS
S Standard penetration test using a standard, split spoon sampler C Standard penetration test using a solid steel cone because of the
presence of gravel or obstructions N The SPT ‘N Value’ is the number of standard blows required to drive the
tool for 300mm after an initial penetration of 150mm (seating blows). The test is normally terminated after a total of 50 blows, including the seating blows, when 50+ or >50 is recorded in the appropriate column of the borelog, together with details of the actual distance penetrated recorded in the Remarks section e.g. ‘50 for 35mm’.
U A so called ‘undisturbed’ sample, more correctly designated as a ‘tube sample’. These are normally of 100mm nominal bore. The tube is usually driven into the ground unless otherwise stated. Where there was no recovery this is usually indicated by NR in the adjacent column. The cohesion is recorded in this column to one decimal place. Where the angle of shearing resistance exceeds zero this figure is shown in brackets following the cohesion.
B Bulk disturbed sample D or J Small disturbed or jar sample W Water sample V Vane Test P N value computed from dynamics in window sampling borehole. This
value for guidance only at present Casing Depth Water Strike Standing Water Level Legend The symbols used are essentially those designated in BS 5930:1999,
although, for clarity, only the symbol for the predominant material is used on occasions
DISPOSAL OF SAMPLES
The samples recovered in this investigation will remain in our laboratory for two weeks after the issue of this report. The client must therefore direct us immediately if he wishes the samples to be retained for a longer period, for which a storage charge will be made. Alternatively the client can collect the samples from our laboratory, by appointment, for storage.
COPYRIGHT
The information in this report belongs to the client defined in the Introduction. The copyright, however, remains vested with the authors.
Results of In-situ Ground Gas Testing
72699 - 547 Holly Lane
Note
CO2 = Carbon Dioxide
CH4 = Methane
O2 = Oxygen
Site: Land Adjacent to Redditch Road Note:
Ref:72765/54696 CO2 = Carbon Dioxide
CH4 = Methane
O2 = Oxygen
Date: 07.07.2011
Atmospheric Pressure: 1013mb steady
Weather Conditions: Dry, Overcast
Ground Conditions: Dry
Peak Steady Peak Steady
WS1 0.00 0.00 0.40 0.40 <0.1 <0.1 20.20 5.00 3.80
Date: 12.09.2011
Atmospheric Pressure: 990mb (falling rapidly)
Weather Conditions: Showers, high windsGround Conditions: Damp
Peak Steady Peak Steady
WS1 0.10 0.00 1.40 1.30 <0.1 <0.1 18.80 5.00 3.90
NotesCH4 (% vol)
Water Level
(m)
Clear
Depth (m)
Pressure
(Pascals)
Flow
(Litre/hr)
CO2 (% vol)
Pressure
(Pascals)
Flow
(Litre/hr)
RESULTS OF IN-SITU GAS TESTING
Location
Reference
Location
Reference
CH4 (% vol)CO2 (% vol) O2
(% vol)
Water Level
(m)
Clear
Depth (m)
O2
(% vol)
Notes
Severn Trent Services Analytical Services is a trading name of Severn Trent Laboratories Limited. This communication has been sent to you by Severn Trent Laboratories Ltd. Registered in England and Wales. Registration No.2148934. Registered Office: Severn Trent Centre, 2 St. John's Street, Coventry, CV1 2LZ
18 July 2011
Test Report: COV/789279/2011
Dear Mr Manders
Analysis of your sample(s) submitted on 04 July 2011 is now complete and we have pleasure in enclosing the appropriate test report(s).
Name:
Yours Sincerely,
Title:
Signed:
L. Ellis
Inorganics Operations Manager
Mr Manders Birmingham City Council Urban Design 1 Lancaster Circus Birmingham B4 7DG West Midlands
Should you have any queries regarding this report(s) or any part of our service, please contact Customer Services on +44 (0)24 7642 1213 who will be happy to discuss your requirements. If you would like to arrange any further analysis, please contact Customer Services. To arrange container delivery or sample collection, please call the Couriers Department directly on 024 7685 6562. Thank you for using Severn Trent Services and we look forward to receiving your next samples.
An invoice for the analysis carried out will be sent under separate cover.
Mr Bob Manders Birmingham City Council Urban Design 1 Lancaster Circus Birmingham West Midlands B4 7DG
Report Summary
Date of Issue: 18 July 2011
1314 1229 0897 4409
Information on the methods of analysis and performance characteristics are available on request. Opinions and interpretations expressed herein are outside the scope of UKAS accreditation. The results relate only to the items tested. Tests marked 'Not UKAS Accredited' in this Report/Certificate are not included in the UKAS Accreditation Schedule for our laboratory.
Severn Trent Services Analytical Services is a trading name of Severn Trent Laboratories Limited. This communication has been sent to you by Severn Trent Laboratories Limited. Registered in England and Wales. Registration No. 2148934. Registered Office: Severn Trent Centre, 2 St. John's Street, Coventry, CV1 2LZ (c) Severn Trent Services 2011. All rights reserved. We, Severn Trent Laboratories Limited, are the owner of all copyright in this report. You must not copy, reproduce, amend or adapt this report, its contents or any format in which it is delivered without our prior written agreement. If you copy, reproduce, amend, or adapt this report in any way without our agreement you will be liable for any damage or loss to us. In the event of a dispute the copy of the report held by us shall be the reference copy.
Severn Trent Services was not responsible for sampling unless otherwise stated. Sampling is not covered by our UKAS accreditation.
Test Description Result Units Accreditation Method
Issueof 8
1Sample 1
Sample Matrix: Soil - Loam
Analyst Comments for 12470948: ASBESTOS COMMENTS Asbestos ID : Amosite, Description of Sample: Fibres in soil
Accreditation Codes: Y = UKAS Accredited, N = Not UKAS Accredited, M = MCERTS. Analysed at: Brd = Bridgend, Cov = Coventry, Rea = Reading, Run = Runcorn, S = Subcontracted, Wak = Wakefield. For Microbiological determinands 0 or ND=Not Detected, For Legionella ND=Not Detected in volume of sample filtered. Relating to Legionella volume analysed 1g is approximately equivalent to 1ml. I/S=Insufficient sample
Test Description Result Units Accreditation Method
Issueof 8
1Sample 2
Sample Matrix: Soil - Loam
Analyst Comments for 12470949: ASBESTOS COMMENTS Asbestos ID : Chrysotile, Description of Sample: Fibres in soil
Accreditation Codes: Y = UKAS Accredited, N = Not UKAS Accredited, M = MCERTS. Analysed at: Brd = Bridgend, Cov = Coventry, Rea = Reading, Run = Runcorn, S = Subcontracted, Wak = Wakefield. For Microbiological determinands 0 or ND=Not Detected, For Legionella ND=Not Detected in volume of sample filtered. Relating to Legionella volume analysed 1g is approximately equivalent to 1ml. I/S=Insufficient sample
Test Description Result Units Accreditation Method
Issueof 8
1Sample 3
Sample Matrix: Soil - Loam
Analyst Comments for 12470950: ASBESTOS COMMENTS Asbestos ID : Non Detected, Description of Sample: Soil
Accreditation Codes: Y = UKAS Accredited, N = Not UKAS Accredited, M = MCERTS. Analysed at: Brd = Bridgend, Cov = Coventry, Rea = Reading, Run = Runcorn, S = Subcontracted, Wak = Wakefield. For Microbiological determinands 0 or ND=Not Detected, For Legionella ND=Not Detected in volume of sample filtered. Relating to Legionella volume analysed 1g is approximately equivalent to 1ml. I/S=Insufficient sample
Test Description Result Units Accreditation Method
Issueof 8
1Sample 4
Sample Matrix: Soil - Loam
Analyst Comments for 12470951: No Analyst Comment
Accreditation Codes: Y = UKAS Accredited, N = Not UKAS Accredited, M = MCERTS. Analysed at: Brd = Bridgend, Cov = Coventry, Rea = Reading, Run = Runcorn, S = Subcontracted, Wak = Wakefield. For Microbiological determinands 0 or ND=Not Detected, For Legionella ND=Not Detected in volume of sample filtered. Relating to Legionella volume analysed 1g is approximately equivalent to 1ml. I/S=Insufficient sample
Test Description Result Units Accreditation Method
Issueof 8
1Sample 5
Sample Matrix: Soil - Loam
Analyst Comments for 12471699: ASBESTOS COMMENTS Asbestos ID : Non Detected, Description of Sample: Soil
Accreditation Codes: Y = UKAS Accredited, N = Not UKAS Accredited, M = MCERTS. Analysed at: Brd = Bridgend, Cov = Coventry, Rea = Reading, Run = Runcorn, S = Subcontracted, Wak = Wakefield. For Microbiological determinands 0 or ND=Not Detected, For Legionella ND=Not Detected in volume of sample filtered. Relating to Legionella volume analysed 1g is approximately equivalent to 1ml. I/S=Insufficient sample
Test Description Result Units Accreditation Method
Issueof 8
1Sample 6
Sample Matrix: Soil - Loam
Analyst Comments for 12471700: ASBESTOS COMMENTS Asbestos ID : Non Detected, Description of Sample: Soil
Accreditation Codes: Y = UKAS Accredited, N = Not UKAS Accredited, M = MCERTS. Analysed at: Brd = Bridgend, Cov = Coventry, Rea = Reading, Run = Runcorn, S = Subcontracted, Wak = Wakefield. For Microbiological determinands 0 or ND=Not Detected, For Legionella ND=Not Detected in volume of sample filtered. Relating to Legionella volume analysed 1g is approximately equivalent to 1ml. I/S=Insufficient sample
Test Description Result Units Accreditation Method
Issueof 8
1Sample 7
Sample Matrix: Soil - Loam
Analyst Comments for 12471701: ASBESTOS COMMENTS Asbestos ID : Non Detected, Description of Sample: Soil
Accreditation Codes: Y = UKAS Accredited, N = Not UKAS Accredited, M = MCERTS. Analysed at: Brd = Bridgend, Cov = Coventry, Rea = Reading, Run = Runcorn, S = Subcontracted, Wak = Wakefield. For Microbiological determinands 0 or ND=Not Detected, For Legionella ND=Not Detected in volume of sample filtered. Relating to Legionella volume analysed 1g is approximately equivalent to 1ml. I/S=Insufficient sample
Test Description Result Units Accreditation Method
Issueof 8
1Sample 8
Sample Matrix: Soil - Loam
Analyst Comments for 12471702: ASBESTOS COMMENTS Asbestos ID : Non Detected, Description of Sample: Soil
Accreditation Codes: Y = UKAS Accredited, N = Not UKAS Accredited, M = MCERTS. Analysed at: Brd = Bridgend, Cov = Coventry, Rea = Reading, Run = Runcorn, S = Subcontracted, Wak = Wakefield. For Microbiological determinands 0 or ND=Not Detected, For Legionella ND=Not Detected in volume of sample filtered. Relating to Legionella volume analysed 1g is approximately equivalent to 1ml. I/S=Insufficient sample
Page 13 of 13
Date: 24/08/2011
2139 Certificate Number: 11-52899
Client: Severn TrentSTL Business CentreTorrington AvenueCoventryCV4 9GU
Our Reference: 11-52899
Client Reference: 799739
Contract Title: 799739
Description: 2 soil samples
Date Received: 18 August 2011
Date Started: 18 August 2011
Date Completed: 24 August 2011
Test Procedures: Identified by prefix DETSn, details available upon request.
Notes: Observations and interpretations are outside the scope of UKAS accreditation
Approved By:
Paul Woodbridge, Senior Operations Manager
Certificate of Analysis
This certificate is issued in accordance with the accreditation requirements of the United Kingdom Accreditation Service. The results reported herein
relate only to the material supplied to the laboratory. This certificate shall not be reproduced except in full, without the prior written approval of the
laboratory.
Derwentside Environmental Testing Services LimitedUnit 2, Park Road Industrial Estate South, Consett, Co Durham, DH8 5PY