Quedgeley, Gloucester

March 2024

RML were commissioned to carry out a Site Investigation for Vodafone at a site in Quedgeley, Gloucester.

Fieldwork

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 2 No. Light Percussion Boreholes, 2 No. Concrete Cores, 2 No. Drive-in-Sampler Boreholes, MEXE Probe CBR Tests, and Land-Borne Gas and Water monitoring were undertaken as part of the investigation.

Ground Conditions

According to information published by British Geological Survey (BGS) the underlying geology is shown as being the Lower Lias of the Lower Jurassic Period. Superficial River Severn Terrace Gravels lie close to the east of the site.

Laboratory Testing

Natural Moisture Contents, Atterberg Limits, Quick Undrained Triaxial Compression Tests, Particle Size Distribution, pH and sulphates, Chemical Analysis- soil, Waste Acceptance Criteria (WAC) and Asbestos identification were the Laboratory tests undertaken for the project.

Chancel Street, Southwark, London

March 2024

RML carried out both a Phase I Desk Study and Phase II Site Investigation for a demolition of an existing two storey building and erection of a seven storey mixed use building and commercial floorspace.

Walkover Survey

A walkover survey was carried out by an RML Engineer to establish if contamination is present from any undocumented practice or industrial use of the land and surrounding land and if necessary to confirm the accuracy of the information obtained from elsewhere as part of the Preliminary Risk Assessment (PRA) data gathering process . A visual assessment of the land to check for signs of industrial activity, landfilling, fly tipping , fuel storage, fuel tanks, asbestos related materials or any land contamination was undertaken and a photographic record made to provide evidence to show the condition of the land at the time of the Walkover Survey.

Phase 1 Environmental Risk Assessment

Environmental data, comprising geo-environmental hazards, hydrology and hydrogeology, was obtained for the current site covering an area of up to 1000m from the site boundary.

Historical Maps

Historical Ordnance Survey maps were also obtained for the site, as part of the PRA data gathering process. These maps were used to inform of potential historical contaminative processes.

Fieldwork

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 1 No. Cable Percussion borehole, 4 No. Hand Excavated Trial Pits, On-site UXO support were undertaken at the site. Monitoring installations were subsequently fitted within the boreholes to facilitate land-borne gas monitoring.

Laboratory Testing

Natural Moisture Contents, Atterberg Limits, Undrained Triaxial Compression Tests, Particle Size Distribution Tests, pH & sulphate tests, chemical analysis and Asbestos Identifications were undertaken for the project.

Sovereign Harbour Retail Park, Eastbourne

February 2024

RML carried out both a Phase I Desk Study and Phase II Site Investigation for the demolition of existing buildings on the site and construction of two separate drive-thru ‘pods’ together with associated landscaping and parking.

Walkover Survey

Phase 1 Environmental Risk Assessment

Environmental data, comprising geo-environmental hazards, hydrology and hydrogeology, was obtained for the current site covering an area of up to 1000m from the site boundary.

Historical Maps

Historical Ordnance Survey maps were also obtained for the site, as part of the PRA data gathering process. These maps were used to inform of potential historical contaminative processes.

Fieldwork

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 3 No. Cable Percussion boreholes, 6 No. Drive-in-sampler Boreholes, BRE 365 Soil Infiltration Tests and MEXE Probe CBR Tests were undertaken at the site. Monitoring installations were subsequently fitted within the boreholes to facilitate land-borne gas monitoring.

Laboratory Testing

Natural Moisture Contents, Atterberg Limits, Undrained Triaxial Compression Tests, Particle Size Distribution Tests, pH & sulphate tests, chemical analysis, Waste Acceptance Criteria (WAC) and Asbestos Identifications were undertaken for the project.

Portsmouth Road, Kingston

January 2024

RML were commissioned to carry out a Site investigation for a demolition of existing buildings and construction of a two-storey building, including basement level, providing two office units and six residential units, together with the associated access, car parking and landscaping.

Fieldwork

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 5 No. Light Percussion Boreholes, 6 No. Hand Excavated Trial Pits, Ground Water Sampling and Land-Borne Gas and Water monitoring were undertaken as part of the investigation.

Ground Conditions

According to information published by British Geological Survey (BGS) the underlying geology is shown as being Recent Langley Silt overlying Kempton Park Gravel (River Thames Terrace Deposits) over London Clay of the Eocene Period.

Laboratory Testing

Natural Moisture Contents, Quick Undrained Triaxial Compression Tests, Particle Size Distribution, pH and sulphates, Chemical Analysis- Soil & Water, Hazardous Waste Classification tests, Waste Acceptance Criteria (WAC) and Asbestos identification were the Laboratory tests undertaken for the project.

Lower Radley, Abingdon

January 2024

RML were commissioned to carry out a Site Investigation, together with laboratory testing, in order to provide information to assist rising main design and inform of any potential soil contamination.

Fieldwork

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 2 No. Rotary Core Boreholes, 4 No. Drive-in-sampler boreholes and Land-Borne Gas and Water monitoring were undertaken as part of the investigation.

Ground Conditions

According to information published by British Geological Survey (BGS) the underlying geology along the route varies from north to south, with superficial outcrops of Summertown-Radley Sand and Gravel Member in the northern portion and Northmoor Sand and Gravel Member in the southern portion of the route. Bedrock deposits vary from Kingston Formation (Sandstone) in the northern portion, to Standford Formation (Limestone) in the middle portion and then Ampthill and Kimmeridge Clay Formation in the southern portion of the route. Possible superficial deposits of Alluvium encroach into the eastern portion of the route.

Laboratory Testing

Natural Moisture Contents, Atterberg Limits, Quick Undrained Triaxial Compression Tests, Particle Size Distribution, pH and sulphates, Chemical Analysis- soil, Hazardous Waste Classification tests, Waste Acceptance Criteria (WAC) and Asbestos identification were the Laboratory tests undertaken for the project.

St. Johns Road, Harrow, London

December 2023

RML carried out both a Phase I Desk Study and Phase II Site Investigation for the demolition of an existing building on the site and construction of hotel accommodation (Use Class C1) and construction of basement level; ancillary restaurant and conference rooms (Use class E); together with associated bin store; landscaping and parking.

Walkover Survey

Phase 1 Environmental Risk Assessment

Environmental data, comprising geo-environmental hazards, hydrology and hydrogeology, was obtained for the current site covering an area of up to 1000m from the site boundary.

Historical Maps

Historical Ordnance Survey maps were also obtained for the site, as part of the PRA data gathering process. These maps were used to inform of potential historical contaminative processes.

Fieldwork

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 1 No. Cable Percussion borehole, 5 No. Drive-in-sampler Boreholes, 3 No. Hand Excavated Trial Pits and MEXE Probe CBR Tests were undertaken at the site. Monitoring installations were subsequently fitted within the boreholes to facilitate land-borne gas monitoring.

Laboratory Testing

Natural Moisture Contents, Undrained Triaxial Compression Tests, pH & sulphate tests, chemical analysis, Waste Acceptance Criteria (WAC) and Asbestos Identifications were undertaken for the project.

Former Hawley Hurst School, Camberley

November 2023

RML were commissioned to carry out a Site investigation for a demolition of some existing buildings and construction of a single-storey four classroom building, two-storey science block and single-storey school café building and associated landscaping.

Fieldwork

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 1 No. Cable Percussion Borehole, 4 No. Light Percussion boreholes, BRE 365 soil infiltration Tests, MEXE probe CBR Tests and Land-Borne Gas and Water monitoring were undertaken as part of the investigation.

Ground Conditions

According to information published by British Geological Survey (BGS) the underlying geology at the site is shown as being the Camberley Sand Formation (Barton Sand) of the Eocene Period.

Laboratory Testing

Particle Size Distribution, pH and sulphates, Chemical Analysis- soil and Asbestos identification were the Laboratory tests undertaken for the project.

Stratford Bus Station, Great Eastern Road

November 2023

RML were commissioned to carry out a Site investigation for a extension of the existing Bus Station welfare facilities in Stratford.

Fieldwork

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 5 No. Concrete Cores, 1 No. Window sampler borehole, 2 No. Hand Auger Boreholes, 2 No. Hand Excavated Trial pits and MEXE probe CBR Tests were undertaken as part of the investigation.

Ground Conditions

According to information published by British Geological Survey (BGS) the underlying geology at the site is shown as being Alluvium of the Quaternary Period overlying the Lambeth Group formerly (Woolwich and Reading Formations) of the Paleogene Period.

Laboratory Testing

Natural Moisture Contents, Atterberg Limits, Particle Size Distribution, Quick Undrained Triaxial Compression Tests, pH and sulphates, Chemical Analysis- soil, Unconfined Compression Tests, Waste Acceptance Criteria (WAC) Tests and Asbestos identification were the Laboratory tests undertaken for the project.

Chichester College, Chichester

October 2023

RML were commissioned to carry out a Site Investigation for a construction of a new four-storey building with associated landscaping, together with an additional compound area including a single-storey building with parking, storage and an electricity sub-station.

Fieldwork

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 2 No. Cable Percussion Boreholes, 3 No. Drive-in-sampler boreholes, Plate Load Bearing Tests and Land-Bourne Gas and Water Monitoring were undertaken as part of the investigation.

Ground Conditions

According to information published by British Geological Survey (BGS) the underlying geology at the site is shown as being Recent River Terrace Gravels overlying London Clay of the Eocene Period with the boundaries of the underlying Lambeth Group and Chalk lie close to the south-west of the site.

Laboratory Testing

Natural Moisture Contents, Atterberg Limits, Particle Size Distribution, Quick Undrained Triaxial Compression Tests, pH and sulphates, Chemical Analysis- soil, Hazardous Waste Classification Tests, Waste Acceptance Criteria (WAC) and Asbestos identification were the Laboratory tests undertaken for the project.

Wall Grange to Ladderedge Resilience Main

September 2023

RML were commissioned to carry out a Site investigation for a new Resilience Main for Severn Trent, running between Wall Grange and Ladderedge, Leek, Staffordshire.

Fieldwork

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 5 No. Rotary Core Boreholes were undertaken as part of the investigation.

Ground Conditions

According to information published by British Geological Survey (BGS) the underlying geology comprised the Morridge Formation and Chester Formation from the Triassic Period.

Laboratory Testing

Waste Acceptance Criteria (WAC) tests were the Laboratory tests undertaken for the project.

Premier Inn Wembley Park

August 2023

RML were commissioned to carry out a Site investigation to provide information to assist in the repair or replacement of the existing car park construction owing to excessive settlement.

Fieldwork

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 62 No. Dynamic Probe Tests (DPSH), 14 No. Drive-in-sampler boreholes and Reinstatement were undertaken as part of the investigation.

Ground Conditions

According to information published by British Geological Survey (BGS) the underlying geology at the site is shown as being Alluvium overlying London Clay of the Eocene Period.

Laboratory Testing

Chemical Analysis, Waste Acceptance Criteria (WAC) Tests and Asbestos Identification were the Laboratory tests undertaken for the project.

Northend Trading Estate, Erith

August 2023

RML were commissioned to carry out a Site Investigation to provide information on the existing road make-up and underlying sub-soil conditions at this site to assist the Consulting Engineers to establish the load carrying capacity of the ramped concrete entrance road.

Fieldwork

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 4 No. Concrete Cores, 4 No. Drive-in-sampler boreholes, MEXE Probe CBR Tests and fast setting reinstatement were undertaken as part of the investigation.

Ground Conditions

According to information published by British Geological Survey (BGS) the underlying geology at the site is shown as being Recent Crayford Silt Member over lying Thanet Sand (Lambeth Group) of the Palaeocene Period overlying Upper Chalk of the Upper Cretaceous Period.

Laboratory Testing

Natural Moisture Contents, Particle Size Distribution, Quick Undrained Triaxial Compression Tests and Unconfined Compression Tests were the Laboratory tests undertaken for the project.

Princess Anne Hospital, Southampton

August 2023

RML carried out both a Phase I Desk Study and Phase II Site Investigation for construction of a new generator compound and retaining wall.

Walkover Survey

Phase 1 Environmental Risk Assessment

Environmental data, comprising geo-environmental hazards, hydrology and hydrogeology, was obtained for the current site covering an area of up to 1000m from the site boundary.

Historical Maps

Historical Ordnance Survey maps were also obtained for the site, as part of the PRA data gathering process. These maps were used to inform of potential historical contaminative processes.

Field Work

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 1 No. Cable Percussion borehole and 1 No. Hand Excavated Trial Pit were undertaken at the site. Monitoring installations were subsequently fitted within the boreholes to facilitate land-borne gas monitoring.

Laboratory Testing

Natural Moisture Contents, Particle Size Distribution Tests, Quick Undrained Triaxial Compression Tests, pH & sulphate tests, chemical analysis, Waste Acceptance Criteria (WAC) tests and Asbestos Identifications were undertaken for the project.

Station Road Rising Main, Little Marlow

July 2023

RML were commissioned to carry out a Site investigation for a proposed rising main between Marlow Rugby Union Football Club and the Thames Water Little Marlow Treatment Works.

Fieldwork

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 9 No. Light Percussion Boreholes and Land-Borne Gas & Groundwater Monitoring were undertaken as part of the investigation.

Ground Conditions

According to information published by British Geological Survey (BGS) the underlying geology at the site is shown as being recent Alluvium and/or recent Shepperton Gravel (River Thames Terrace Deposits) overlying Upper Chalk of the Cretaceous Period.

Laboratory Testing

Natural Moisture Contents, Atterberg Limits, Particle Size Distribution, Quick Undrained Triaxial Compression Tests, Chemical Analysis for soil & water, Hazardous Waste Classification Tests, Waste Acceptance Criteria Tests (WAC), Asbestos Identifications and pH and Sulphate Tests were the Laboratory tests undertaken for the project.

Hackney Wick, London

July 2023

RML were commissioned to carry out a Site investigation for a demolition of existing structures and construction of ground plus 7 storey building comprising hotel (Class C1) and ground floor commercial uses (Class E) with associated landscaping, cycle parking and plant.

Fieldwork

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. On-Site UXO Report, 3 No. Sonic Coring Boreholes, 5 No. Hand Excavated Trial Pits, Land-Borne Gas & Groundwater Monitoring and Photoionization Detector (PID) Monitoring were undertaken as part of the investigation.

Ground Conditions

According to information published by British Geological Survey (BGS) the underlying geology at the site site is shown as being Recent Alluvium overlying Taplow Gravel (River Thames Terrace Deposits) overlying the Lambeth Group of the Palaeocene Period.

Laboratory Testing

Natural Moisture Contents, Particle Size Distribution, Quick Undrained Triaxial Compression Tests, Chemical Analysis for soil & water, Waste Acceptance Criteria (WAC) Tests, Asbestos Identifications and pH and Sulphate Tests were the Laboratory tests undertaken for the project.

Hillbury Road, Warlingham

June 2023

RML were commissioned to carry out a Site investigation for a demolition of an existing dwelling and construction of two new, two-storey, properties with habitable roof spaces, together with associated car parking, access and landscaping.

Field Work

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 2 No. Light Percussion Boreholes, Falling Head Permeability tests and Land-Borne Gas and Groundwater monitoring were undertaken as part of the investigation.

Ground Conditions

According to information published by British Geological Survey (BGS) the underlying geology is shown as being Clay-with-Flints overlying Upper Chalk of the Upper Cretaceous Period.

Laboratory Testing

Natural Moisture Contents, Atterberg Limits, Quick Undrained Triaxial Compression Tests, pH and Sulphates, Chemical Analysis- soil and Asbestos identifications were the Laboratory tests undertaken for the project.

Sterling House, Loughton

June 2023

RML were commissioned to carry out a Site investigation to obtain information on the concrete slab, sub-soil conditions and existing foundations at this site, together with some laboratory testing, in order to provide baseline information for subsequent foundation design by others.

Fieldwork

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 7 No. Concrete Cores, 1 No. Dual Sonic/Rotary Coring Borehole, 3 No. Drive-in-sampler Boreholes, 2 No. Mechanically Excavated Trial Pits and MEXE Probe CBR tests were undertaken as part of the investigation.

Ground Conditions

According to information published by British Geological Survey (BGS) the underlying geology at the site site is shown as being London Clay of the Eocene Period.

Laboratory Testing

Natural Moisture Contents, Atterberg Limits, Quick Undrained Triaxial Compression Tests, Unconfined Compression Tests, Chemical Analysis, Waste Classification Tests, Asbestos Identifications and pH and Sulphate Tests were the Laboratory tests undertaken for the project.

Industrial Estate, Romsey

June 2023

RML were commissioned to carry out a Site investigation for the demolition of existing buildings and construction of new, single-storey, industrial units.

Fieldwork

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 1 No. Cable Percussion Borehole, 3 No. Light Percussion Boreholes and Land-Borne Gas and Groundwater Monitoring were undertaken as part of the investigation.

Ground Conditions

According to information published by British Geological Survey (BGS) the underlying geology at the site site site is shown as being recent Alluvium overlying recent River Terrace Deposits overlying the Wittering Formation (Bracklesham Group) of the Palaeogene Period.

Laboratory Testing

Natural Moisture Contents, Atterberg Limits, Quick Undrained Triaxial Compression Tests, Particle Size Distribution, Chemical Analysis, Asbestos Identifications and pH and Sulphate Tests were the Laboratory tests undertaken for the project.

Vale School, Worthing

May 2023

RML were commissioned to carry out a Site investigation to establish the condition and profiles of existing foundations to perimeter fence posts as well as perimeter edging to an existing pitch.

Fieldwork

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 4 No. Drive-in-sampler Boreholes, 9 No. Hand Excavated Trial Pits, MEXE Probe CBR Tests, and Land-Borne Gas and Water monitoring were undertaken as part of the investigation.

Ground Conditions

According to information published by British Geological Survey (BGS) the underlying geology is shown as being on the boundary of Recent Head Deposits overlying the Upper and Middle Chalk (Newhaven Chalk) of the Upper Cretaceous Period.

Laboratory Testing

Quick Undrained Triaxial Compression Tests, Chemical Analysis- soil, Waste Classification Test and asbestos identification were the Laboratory tests undertaken for the project.

Bramber Primary School, Worthing

May 2023

RML were commissioned to carry out a Site investigation to establish the condition and type of existing pitch construction makeup, drainage construction including land drains and soakaways, to determine ground conditions and geotechnical properties of the subsoil for pitch construction design including soakaway design and also to investigate the environmental characteristics of the ground including contamination testing, gas/groundwater monitoring and waste acceptance criteria.

Field Work

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 3 No. Drive-in-sampler Boreholes, 8 No. Mechanically Excavated Trial Pits, MEXE Probe CBR tests, BRE 365 Soil Infiltration Tests and Land-Borne Gas and Groundwater Monitoring were undertaken as part of the investigation.

Ground Conditions

According to information published by British Geological Survey (BGS) the underlying geology at the site site is shown as being Recent Head Deposits overlying the Upper and Middle Chalk (Tarrant Chalk Member) of the Upper Cretaceous Period.

Laboratory Testing

Particle Size Distribution, Quick Undrained Triaxial Compression Tests, Chemical Analysis, Waste Classification Tests, Asbestos Identifications and pH and Sulphate Tests were the Laboratory tests undertaken for the project.

Cinque Ports Way WPS to Hastings and Bexhill

April 2023

RML were commissioned to carry out a Site investigation for to provide further information on the sub-soil conditions at points along the a proposed water main route, together with laboratory testing, in order to provide information to assist foundation design, potential contamination and the choice of pipe materials.

Fieldwork

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 6 No. Light Percussion Boreholes, 1 No. Drive-In-Sampler Borehole and Land-borne Gas Monitoring were undertaken as part of the investigation.

Ground Conditions

According to information published by British Geological Survey (BGS) the underlying geology at the site is shown as being recent Alluvium and/or recent Storm Gravel Beach Deposits overlying the Ashdown Beds of the Cretaceous Period.

Laboratory Testing

Natural Moisture Contents, Atterberg Limits, Quick Undrained Triaxial Tests, Particle Size Distribution, Chemical Analysis, Waste Classification Tests, Asbestos Identification and pH and Sulphate Tests were the Laboratory tests undertaken for the project.

Oakley Green Trunk Main, Windsor

April 2023

RML were commissioned to carry out a Site investigation for a new foul water rising main crossing beneath the River Thames.

Fieldwork

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 2 No. Cable Percussion Boreholes, 3 No. Light Percussion Boreholes and Groundwater Monitoring were undertaken as part of the investigation.

Ground Conditions

According to information published by British Geological Survey (BGS) the underlying geology at the site site is shown as being Recent Kempton Park Gravel (River Thames Terrace Deposits) overlying London Clay of the Eocene Period. The southern side of the River Thames at Windsor Marina is shown to have Recent Alluvium overlying the Kempton Park Gravel.

Laboratory Testing

Natural Moisture Contents, Particle Size Distribution, Quick Undrained Triaxial Compression Tests, Chemical Analysis, Waste Classification Tests, Asbestos Identifications and pH and Sulphate Tests were the Laboratory tests undertaken for the project.

Kennedy Road, Shrewsbury

March 2023

RML carried out both a Phase I Desk Study and Phase II Site Investigation for the demolition of an existing property and construction of a new, low-rise, property.

Walkover Survey

Phase 1 Environmental Risk Assessment

Environmental data, comprising geo-environmental hazards, hydrology and hydrogeology, was obtained for the current site covering an area of up to 1000m from the site boundary.

Historical Maps

Historical Ordnance Survey maps were also obtained for the site, as part of the PRA data gathering process. These maps were used to inform of potential historical contaminative processes.

Site Works

3 No. Light Percussion boreholes, 1 No. Drive-in-sampler Borehole, 1 No. Mechanically excavated Trial Pit, 1 No. BRE 365 Soil Infiltration test, 2 No. Shallow Soil Infiltration Tests and MEXE Probe CBR Tests were undertaken at the site.

Laboratory Testing

Natural Moisture Contents, Atterberg Limits, Quick Undrained Triaxial Compression Tests, Particle Size Distribution Tests, pH & sulphate tests, Chemical Analysis, Waste Classification Tests and Asbestos identifications were undertaken for the project.

Letchworth to Royston Trunk Main

February 2023

RML were commissioned to carry out a Site investigation for a information on the sub-soil conditions at points along a proposed water main route, together with laboratory testing, in order to provide information to assist foundation design, potential contamination and the choice of pipe materials.

Field Work

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 14 No. Light Percussion Boreholes, 4 No. Drive-in-sampler Boreholes and 1 No. Sonic Coring Borehole was undertaken across the route.

Ground Conditions

According to information published by British Geological Survey (BGS) the underlying geology at the site site is the Holywell Nodular Chalk Formation and the New Pit Chalk Formation (Middle Chalk). Superficial deposits were sporadic across the route and if found to be present would comprise of either Head Deposits or Glacial Till.

Laboratory Testing

Natural Moisture Contents, Atterberg Limits, Particle Size Distribution, Quick Undrained Triaxial Compression Tests, Chemical Analysis, Asbestos Identification and pH and Sulphate Tests were the Laboratory tests undertaken for the project.

Thurlow Park, Pagoda Grove, Norwood

January 2023

RML carried out both a Phase I Desk Study and Phase II Site Investigation for construction of a terrace of eight, three bedroom, town houses, together with associated private garden areas, communal landscaped areas, retaining structures and car parking facilities.

Walkover Survey

Phase 1 Environmental Risk Assessment

Environmental data, comprising geo-environmental hazards, hydrology and hydrogeology, was obtained for the current site covering an area of up to 1000m from the site boundary.

Historical Maps

Historical Ordnance Survey maps were also obtained for the site, as part of the PRA data gathering process. These maps were used to inform of potential historical contaminative processes.

Site Works

4 No. Light Percussion boreholes, 6 No. Drive-in-sampler Boreholes, Falling Head Permeability Tests and MEXE Probe CBR Tests were undertaken at the site. Monitoring installations were subsequently fitted within the boreholes to facilitate land-borne gas monitoring.

Laboratory Testing

Natural Moisture Contents, Atterberg Limits, Quick Undrained Triaxial Compression Tests, pH & sulphate tests, chemical analysis and asbestos identifications were undertaken for the project.

Worthing Integrated Care Center

January 2023

RML were commissioned to carry out a borehole investigation to assist in the design of a piled foundation.

Fieldwork

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 2 No. Sonic Coring Boreholes were drilled at the site to depth of 30m.

Ground Conditions

According to information published by British Geological Survey (BGS) the underlying geology at the site is Recent Brickearth overlying Upper and Middle Chalk of the Cretaceous Period.

Laboratory Testing

Natural Moisture Contents, Atterberg Limits, Particle Size Distribution, Quick Undrained Triaxial Compression Tests, Chalk Density and pH and Sulphate Tests were the Laboratory tests undertaken for the project.

Telecommunications Node, Poplar

December 2022

RML were commissioned to carry out an intrusive site investigation designed to obtain information on the sub-soil conditions at this site, together with some laboratory testing, in order to provide baseline information for any subsequent foundation design by others.

UXO Report

A Detailed UXO Threat & Risk Assessment was commissioned for the site prior to intrusive work, the report concluded that the risk level for the site was ‘medium’ with the most probable UXO threat posed by WWII German HE bombs, whilst IBs (Incendiary Bomb) and British AAA (Anti-Aircraft Ammunition) projectiles (which were used to defend against German bombing raids) pose a residual threat. Consequently on-site supervision was required during intrusive work.

Site Work By Risk Management Ltd

Intrusive fieldwork consisted of On-Site-UXO Support, 1 No. Cable Percussion Borehole, 4 No. Hand Augered Boreholes and Land Borne Gas Monitoring.

Laboratory Testing

Laboratory testing included Natural Moisture Contents, Quick Undrained, Triaxial Compression Tests, pH and Sulphate Tests and Waste Acceptance Criteria (WAC).

Sandbanks Road, Poole

November 2022

RML carried out both a Phase I Desk Study and Phase II Site Investigation for the demolition of an existing office building (Class E) and ancillary building and erection of a new office (Class E) building with bin store, cycle store building with associated parking and access.

Walkover Survey

Phase 1 Environmental Risk Assessment

Environmental data, comprising geo-environmental hazards, hydrology and hydrogeology, was obtained for the current site covering an area of up to 1000m from the site boundary.

Historical Maps

Historical Ordnance Survey maps were also obtained for the site, as part of the PRA data gathering process. These maps were used to inform of potential historical contaminative processes.

Site Works

1 No. Cable Percussion borehole, 3 No. Light Percussion boreholes, 1 No. Mechanically excavated Trial Pit, 1 No. BRE 365 Soil Infiltration test, 1 No. Shallow Soil Infiltration Test and MEXE Probe CBR Tests were undertaken at the site. Monitoring installations were subsequently fitted within the boreholes to facilitate land-borne gas monitoring.

Laboratory Testing

Natural Moisture Contents, Atterberg Limits, Quick Undrained Triaxial Compression Tests, pH & sulphate tests, chemical analysis and asbestos identifications were undertaken for the project.

Chesterton Road, Cambridge

November 2022

RML were commissioned to carry out a Site investigation for a demolition of an existing building and provision of a mixed use scheme comprising 19 No. small and large HMO units.

Field Work

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 3 No. Concrete Cores, 3 No. Drive-In-Sampler Boreholes, Shallow Infiltration Tests, Falling Head Permeability Tests, Land-borne Gas Monitoring and Photoionisation Detector (PID) Monitoring were undertaken as part of the investigation.

Ground Conditions

According to information published by British Geological Survey (BGS) the underlying geology at the site comprised 2^nd River Terrace Deposits over the Gault Formation of the of the Cretaceous Period.

Laboratory Testing

Particle Size Distribution, Dynamic Headspace Analysis, Chemical Analysis, Waste Classification Tests and pH and Sulphate Tests were the Laboratory tests undertaken for the project.

Brook Street and Oxford Road Sites, High Wycombe

October 2022

RML were commissioned to carry out a Site investigation for two sites in High Wycombe. Oxford Road Site – demolition of the existing buildings and construction of a new seven-storey building, Brook Street Site – demolition of the existing buildings and construction of a new two-storey building.

Fieldwork

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 3 No. Cable Percussion Boreholes, 3 No. Window Sampler Boreholes, MEXE Probe CBR Tests, 9 No. Hand Excavated Trial Pits, 2 No. BRE 365 Soil Infiltration Tests and Land-borne Gas Monitoring were undertaken as part of the investigation.

Ground Conditions

According to information published by British Geological Survey (BGS) the underlying geology at the site comprised Recent Alluvium deposits overlying Middle Chalk of the Cretaceous Period.

Laboratory Testing

Particle Size Distribution, Chemical Analysis, Waste Acceptance Criteria (WAC), Asbestos Identification Tests and pH and Sulphate Tests were the Laboratory tests undertaken for the project.

Reading Road, Shiplake

September 2022

RML were commissioned to carry out a Site Investigation for the construction of a new, low-rise, detached dwelling with associated access road and landscaping.

Fieldwork

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 2 No. Cable Percussion Boreholes and 20 No. Dynamic Probes (DPSH) were undertaken across the site.

Ground Conditions

According to Information Published by British Geological survey (BGS) the underlying geology of this site site comprised Recent Taplow Gravel (River Thames Terrace Deposits) overlying Upper Chalk of the Upper Cretaceous Period.

Discussions and Recommendations

Geotechnical parameters for conventional shallow foundation design and piled foundations were discussed within the RML report and submitted to the Client.

Barwell Business Park, Chessington

September 2022

RML were commissioned to carry out a Site investigation to gather information on the existing ground
slab and underlying sub-soil conditions at this site, together with laboratory testing,
in order to assist the Consulting Engineers to confirm the safe bearing capacity of the concrete
slab.

Fieldwork

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 4 No. Concrete Cores, 6 No. Drive-in-Sampler Boreholes and MEXE Probe CBR Tests were undertaken as part of the site investigation.

Ground Conditions

According to Information Published by British Geological Survey the underlying geology at this site comprised London Clay of the Eocene Period.

Laboratory Testing

Natural Moisture Contents, Atterberg Limits, Quick Undrained Triaxial Compression Tests and Uniaxial Compression Tests were the Laboratory tests undertaken for this project.

Blashford, Ringwood

August 2022

RML weren commissioned to carry out both a Phase I, Non-Intrusive, Desk Study and a Phase II, Intrusive, Site Investigation for the demolition of the existing dwelling and construction of a new single-storey property with two wings and an outbuilding arranged around a central courtyard.

Walkover Survey by RML Engineer

Phase I Environmental Risk Assessment

Environmental data, Comprising geo-environmental hazards, hydrology and hydrogeology was obtained for the current site covering an area of up to 1000mm from the site boundary.

Historical Maps

Historical Ordnance Survey maps were also obtained for the site, as part of the PRA data gathering process. These maps were used to inform of potential historical contaminative processes.

Fieldwork

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 1 No. Cable Percussion Borehole, 3 No. Drive-In-Sampler Boreholes, 1 No. Hand Excavated Trial Pits and Land-borne Gas Monitoring were undertaken as part of site investigation.

Laboratory Testing

Particle Size Distribution, pH & Sulphate tests, Chemical analysis, Waste Acceptance Criteria (WAC) Tests and Asbestos Identification were the Laboratory tests undertaken as part of investigation.

Ascot Road, MAIDENHEAD

August 2022

RML were instructed to carry out a Site investigation for the demolition of an existing dwelling and construction of a new three-storey property, together with associated car parking, access and landscaping.

Fieldwork

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 1 No. Sonic Coring Borehole, 3 No. Drive-in-Sampler Boreholes, 1 No. Falling Head Permeability Test and Land-borne Gas Monitoring.

Ground Conditions

According to Information Published by British Geological Survey (BGS) the underlying geology at this site comprised London Clay of the Eocene Period. The Lambeth Group would be expected to underlie the London Clay at the site.

Laboratory Testing

Natural Moisture Contents, Atterberg Limits, Quick Undrained Triaxial Compression Tests, Particle Size Distribution Tests, Chemical Analysis, Asbestos Identification, Waste Acceptance Criteria (WAC) Tests and pH and Sulphate Tests were the Laboratory tests undertaken for this project.

Laverstoke Lane, Whitchurch

July 2022

RML were commissioned to carry out a Site investigation for the construction of a large, detached, new property with ancillary buildings consisting of a pool and racket sports court together with associated access road and landscaping.

Filed Work

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 3 No. Light Percussion Boreholes, 6 No. Mechanically Excavated Boreholes, MEXE Probe CBR Tests, and Land-borne Gas Monitoring were undertaken as part of the site investigation.

Ground Conditions

According to Information Published by British Geological survey (BGS) the underlying geology at this site comprised the White Chalk Subgroup of the Upper Cretaceous Period.

Laboratory Testing

Chemical Analysis, Asbestos Identification and pH and Sulphate Tests are the Laboratory tests undertaken for this project.

Leacon Road, Ashford

July 2022

RML were commissioned to carry out both Phase I, Non-intrusive, Desk Study and Phase II, Intrusive, Site investigation for the extension of existing areas of concrete surfacing and the installation of new below ground drainage infrastructure.

Walkover Survey by RML Engineer

Phase I Environmental Risk Assessment

Environmental data, comprising geo-environmental hazards, hydrology and hydrogeology, was obtained for the current site covering an area of up to 1000m from the site boundary.

Historical Maps

Historical Ordnance Survey maps were also obtained for the site, as part of the PRA data gathering process. These maps were used to inform of potential historical contaminative processes.

Fieldwork

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 12 No. Light Percussion Boreholes, MEXE Probe CBR Tests, Shallow Samples, BRE 365 Soil Infiltration Tests, and Land-borne Gas Monitoring were undertaken as part of site investigation.

Laboratory Testing

Natural Moisture Contents, Atterberg Limits, Quick Undrained Triaxial Compression Test, Particle Size Distribution, pH & Sulphates tests, Chemical analysis and Asbestos Identification were the Laboratory tests undertaken for this project.

Gladstone Road, Exeter

June 2022

RML were commissioned to carry out a Site Investigation for a new single-storey extension to the existing Waitrose Supermarket and for a new lightweight canopy in the rear car parking area.

Fieldwork

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 3 No. Drive-In-Sampler Boreholes, MEXE Probe CBR Tests, and 3 No. Mechanically/Hand Excavated Trial Pits were undertaken as part of the investigation.

Ground Conditions

According to information published by British Geological Survey (BGS) the underlying geology at the site were recent River Terrace Deposits overlying Alphington Breccia of the Permian Period.

Laboratory Testing

Natural moisture contents, Atterberg Limits, Quick Undrained Triaxial Compression Tests, and pH and Sulphate Tests were the Laboratory tests undertaken for the project.

Belgravia, London

May 2022

RML were commissioned to carry out both a Phase I Desk study and Phase II Site investigation in Belgravia, London for the complete renovation of a building, while retaining the external facade.

Walkover Survey by RML Engineer

Phase I Environmental Risk Assessment

Environmental data, comprising geo-environmental hazards, hydrology and hydrogeology, was obtained for the current site covering an area of up to 1000m from the site boundary.

Historical Maps

Historical Ordnance Survey maps were also obtained for the site, as part of the PRA data gathering process. These maps were used to inform of potential historical contaminative processes.

Fieldwork

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 1 No. Light Percussion Borehole, 1 No. ‘cut-down’ Cable Percussion Borehole, 1 No. Drive-In-Sampler Borehole, Falling Head Permeability Tests and Land-Borne Gas Monitoring were undertaken as part of investigation.

Laboratory Testing

Natural Moisture Content, Quick Undrained Triaxial Compression Test, Particle Size Distribution, pH & Sulphate tests, Chemical analysis, Asbestos Identification and Waste Acceptance Criteria (WAC) tests were the Laboratory tests undertaken for this project.

Tower Hamlets, Poplar

May 2022

RML were commissioned to carry out a Site Investigation for the demolition of an existing building and construction of two new build residential blocks in Tower Hamlets, Poplar.

Fieldwork

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 3 No. Cable Percussion Boreholes, 3 No. Drive-in-sampler, Mechanically Excavated Trial pits, BRE 365 Soil Infiltration Tests, MEXE Probe CBR Tests, and Land-Borne Gas Monitoring were undertaken as part of the site investigation.

Ground Conditions

According to information published by British Geological Survey (BGS) the underlying geology at the site comprised Kempton Park Gravel (Thames Gravel Deposits) overlying London Clay of the Eocene Period.

Laboratory Testing

Natural moisture contents, Atterberg Limits, Quick Undrained Triaxial Compression Tests, Particle Distribution, pH & Sulphate tests, Chemical analysis, Asbestos Identification and Waste Acceptance Criteria (WAC) are the Laboratory tests undertaken for this project.

Sparsholt, Hampshire

April 2022

RML were instructed to carry out both a Phase I Desk study and Phase II Site investigation in Sparsholt, Hampshire for a conversion of two existing agricultural buildings to form three dwellings.

Walkover Survey by RML Engineer

Phase I Environmental Risk Assessment

Environmental data, comprising geo-environmental hazards, hydrology and hydrogeology, was obtained for the current site covering an area of up to 1000m from the site boundary.

Historical Maps

Historical Ordnance Survey maps were also obtained for the site, as part of the PRA data gathering process. These maps were used to inform of potential historical contaminative processes.

Fieldwork

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 4 No. Light Percussion Boreholes, 6 No. Hand Excavated Trial Pits, BRE 365 Soil Infiltration Test, MEXE Probe CBR Tests, and Land-Borne Gas Monitoring were undertaken as part of site investigation.

Laboratory Testing

Chalk Density Tests, pH & Sulphate tests, Chemical analysis, Asbestos Identification and Waste Acceptance Criteria (WAC) were the Laboratory tests undertaken for this project.

Chiswick High Road, London

March 2022

RML were commissioned to carry out both a Phase I, non-intrusive, Desk Study and Phase II, intrusive, Site Investigation in Chiswick, London for a development of a New Travelodge Hotel.

Walkover Survey by RML Engineer

Phase I Environmental Risk Assessment

Environmental data, comprising geo-environmental hazards, hydrology and hydrogeology, was obtained for the current site covering an area of up to 1000m from the site boundary.

Historical Maps

Historical Ordnance Survey maps were also obtained for the site, as part of the PRA data gathering process. These maps were used to inform of potential historical contaminative processes.

Fieldwork

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 2 No. Cable Percussion Boreholes, 4 No. Drive-in-sampler Boreholes, On-site UXO support and Land-Borne Gas Monitoring.

Laboratory Testing

Natural Moisture Contents, Atterberg Limits, Quick Undrained Triaxial Compression Tests, pH & Sulphate tests, Chemical analysis, Asbestos Identification and Waste Acceptance Criteria (WAC) tests were Laboratory tests undertaken for this project.

St Mary’s Hospital, Isle Of Wight

March 2022

RML were commissioned to carry out both a Phase I, non-intrusive, Desk study and Phase II, intrusive, Site Investigation at St Mary’s Hospital, Isle of Wight for a new single story lightweight building.

Walkover Survey by RML Engineer

Phase I Environmental Risk Assessment

Environmental data, comprising geo-environmental hazards, hydrology and hydrogeology, was obtained for the current site covering an area of up to 1000m from the site boundary.

Historical Maps

Historical Ordnance Survey maps were also obtained for the site, as part of the PRA data gathering process. These maps were used to inform of potential historical contaminative processes.

Fieldwork

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 2 No. Light Percussion Boreholes, 2 No. Hand Auger Boreholes and Land-Borne Gas Monitoring were undertaken as part of investigation.

Laboratory Testing

Natural Moisture Contents, Atterberg Limits, Quick Undrained Triaxial Compression Tests, pH & Sulphates tests, Chemical analysis, Asbestos Identification and Waste Acceptance Criteria (WAC) tests were the Laboratory tests undertaken for this project.

East Finchley, London

March 2022

RML have now been commissioned to carry out both Phase I, non-intrusive, Desk study and Phase II, intrusive, Site investigation for the development of 20 new dwellings in two separate blocks at a site in East Finchley.

Walkover Survey by RML Engineer

Phase I Environmental Risk Assessment

Environmental data, comprising geo-environmental hazards, hydrology and hydrogeology, was obtained for the current site covering an area of up to 1000m from the site boundary.

Historical Maps

Historical Ordnance Survey maps were also obtained for the site, as part of the PRA data gathering process. These maps were used to inform of potential historical contaminative processes.

Fieldwork

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 2 No. Cable Percussion Boreholes, 4 No. Drive-in-Sampler Boreholes, MEXE Probe CBR Tests, 3 No. Hand Excavated Trial Pits, 3 No. Soil Percolation Tests and Land-Borne Gas Monitoring.

Laboratory Testing

Natural Moisture Content, Atterberg Limits, Particle Size Distribution, Quick Undrained Triaxial Compression Tests, Uniaxial Compression Test, pH & Sulphate tests, Chemical analysis, Asbestos Identification and Waste Acceptance Criteria (WAC) tests were the Laboratory tests undertaken for this project.

Caterham, Surrey

February 2022

RML undertook a Verification Report for a development of 48 residential properties with associated private gardens, landscaped areas, hardstanding areas and access roads in Caterham, Surrey.

Site Description

The site was unoccupied and mainly comprised former rear garden areas of existing houses.

Verification Report

RML produced a Verification Report in order to assist with the discharge of planning conditions relating to the development.

Sampling Procedure

Soil samples were collected from locations randomly selected by visual inspection in
order to provide a good spread of material from across the area and
stockpiles. Soil samples were placed in appropriate containers for transport to the Risk
Management Limited in-house laboratory where they were combined, mixed, and
subdivided to produce representative composite samples.

Gravelly Hill, Birmingham

February 2022

RML were commissioned to carry out a Phase I Desk Study and Phase II Site Investigation for Vodafone at a site in Gravelly Hill, Birmingham.

Walkover Survey by RML Engineer

UXO Report

The Detailed UXO Threat & Risk Assessment concluded that the risk level for the site was ‘high’ with the most probable UXO threat posed by WWII German HE bombs, whilst IBs (Incendiary Bomb) and British AAA (Anti-Aircraft Ammunition) projectiles (which were used to defend against German bombing raids) pose a residual threat. On site UXO support was therefore coordinated for all intrusive work.

Historical Maps

Historical Ordnance Survey maps were also obtained for the site, as part of the PRA data gathering process. These maps were used to inform of potential historical contaminative processes.

Site Engineering Work

5 No. concrete cores, MEXE probe CBR tests, 2 No. Drive-in-sampler boreholes, on-site UXO support and Land-borne gas monitoring were undertaken by experienced drillers and engineers.

Laboratory Testing

Moisture contents, Atterberg Limits, Particle Size Distribution, Particle Size Distribution, Quick Undrained Triaxial Compression Tests, Uniaxial compression strength, pH & Sulphates, Chemical Analysis of soil and water and Asbestos Identification were laboratory tests undertaken for this project.

Dormansland, Lingfield

January 2022

RML were instructed to undertake a ground investigation to determine the feasibility of a deep borehole soakaway at a site in Dormansland, Lingfield.

Sonic Drilling

A Sonic core borehole was undertaken in order to investigate ground and groundwater conditions at the site. Sonic drilling is a technique that significantly reduces friction on the drill string and drill bit by using energy resonance to affect the soil structure where it contacts the drill string. This combination makes penetrating for a large range of soils much easier. Sonic drilling is most often used when the drilling is difficult and/or the integrity of the core sample is extremely important.

Soakaway testing

A Sonic borehole was drilled to investigate the feasibility of a deep borehole soakaway.

Milton Keynes

January 2022

RML carried out a Ground Investigation in Milton Keynes for Vodafone for proposed plant and retaining walls.

Walkover Survey by RML Engineer

Phase 1 Environmental Risk Assessment

Environmental data, comprising geo-environmental hazards, hydrology and hydrogeology, was obtained for the current site covering an area of up to 1000m from the site boundary.

Historical Maps

Historical Ordnance Survey maps were also obtained for the site, as part of the PRA data gathering process. These maps were used to inform of potential historical contaminative processes.

Fieldwork

Fieldwork was undertaken in line with British Standards BS 5930:2015+A1:2020. 3 No. Concrete Cores, 5 No. Drive-in-Sampler Boreholes, MEXE Probe CBR Tests and Land-Borne Gas Monitoring were undertaken as part of site investigation.

Laboratory Testing

Natural Moisture Content, Atterberg Limits, Quick Undrained Triaxial Compression Tests, Uniaxial Compression Test, pH & Sulphates tests, Chemical analysis, Asbestos Identification and Waste Acceptance Criteria tests are the Laboratory tests undertaken for this project.

Hemel to Stonecross Trunk Main

November 2021

RML carried out a project for Affinity Water to provide information on the sub-soil conditions at points along a proposed water main route, together with laboratory testing, in order to provide information to assist foundation design and the choice of pipe materials.

Fieldwork

A total 10 No. Light Percussion boreholes were drilled across the route for the proposed Trunk Main. Standard Penetration Test (SPT) ‘N’ values were obtained at the regular intervals within the boreholes.

Ground Conditions

According to information published by the British Geological Survey (BGS) the underlying geology comprised Clay-with-Flints overlying Chalk of the Cretaceous Period.

Laboratory testing

Natural Moisture Contents, Atterberg Limits, Quick Undrained Triaxial Compression Tests, Particle Size Distribution, pH and Sulphate Tests, Asbestos Identifications, Chemical Analysis – Soil, Waste Acceptance Criteria (WAC) tests are the laboratory tests undertaken for this project.

Salford Quays, Manchester

November 2021

The investigation work at Salford Quays, Manchester for the end client Vodafone Ltd, was designed to obtain information on the existing internal slab and subsoil conditions at this site for a slab capacity check and to provide information for subsequent foundation design.

Utility Search

A Utility Search was commissioned prior to any intrusive work, with plans supplied to RML from Vodafone and United Utilities Water Limited shown to affect the site.

UXO Report

Site Work By Risk Management Ltd

Intrusive fieldwork consisted of 2 No. concrete cores, 2 No. drive-in-sampler boreholes and 3 No. CBR tests at each location.

Laboratory Testing

Laboratory testing included Moisture Contents, Atterberg Limits, Particle Size Distribution and Quick Undrained Triaxial Compression Tests.

General Hospital, Southampton

November 2021

RML carried out a Ground Investigation at Southampton General Hospital for the NHS foundation trust to inform the design of a proposed two-storey bridge link between a new extension and the main Hospital building.

Walkover Survey

Phase 1 Environmental Risk Assessment

Environmental data, comprising geo-environmental hazards, hydrology and hydrogeology, was obtained for the current site covering an area of up to 1000m from the site boundary.

Historical Maps

Historical Ordnance Survey maps were also obtained for the site, as part of the PRA data gathering process. These maps were used to inform of potential historical contaminative processes.

Site Works

2 No. Cable Percussion boreholes up to 25m depth were undertaken at the site. Monitoring installations were subsequently fitted within the boreholes to facilitate land-borne gas monitoring.

Laboratory Testing

Particle size distribution, pH & sulphate tests, chemical analysis, asbestos identification, waste acceptance criteria (WAC) tests were undertaken for the project.

Sponder, Derby

October 2021

RML undertook a Ground Investigation for the purposes of informing ground and groundwater conditions along a linear route in Sponder, Derby for the design and construction of a new water main and associated infrastructure.

Site Works By Risk Management Ltd

Intrusive fieldwork consisted of 14 No. Rotary core boreholes, 14 No. Dynamic Cone Penetration (DCP) tests and land-borne gas and groundwater monitoring.

Laboratory Testing

Laboratory testing included asbestos identification, pH and sulphate tests, soil and groundwater contamination tests.

Rickmansworth, Hertfordshire

September 2021

Risk Management Limited were commissioned to undertake a Phase II Site Investigation to inform the design and demolition of existing buildings and construction of 6 new industrial units with external hardstanding.

Intrusive Fieldwork

Intrusive fieldwork consisted of 3 No. Cable percussion boreholes, 6 No. drive-in-sampler boreholes, 6 No. MEXE probe tests, 1 No. Mechanically excavated trail prit, BRE 365 test, infiltration soil test and land-borne gas monitoring.

Laboratory Testing

Laboratory testing included Natural moisture content tests, Atterberg tests, Quick undrained triaxial compression tests, Dynamic headspace analysis, Asbestos identification, pH and Sulphate tests, Soil contamination test and WAC tests.

West Norwood, London

August 2021

Risk Management Limited were commissioned to undertake a Phase II Site Investigation to inform the design and erection of a 2 No. blocks of 3-storey properties, including roof terraces with an attached commercial unit to one of the terraces with associated car parking.

Intrusive fieldwork consisted of 1 No. Light-percussion boreholes up to 12m depth, 4 No. drive-in-sampler boreholes, 6 No. dynamic probe tests, 1 No. falling head permeability test, land-borne gas monitoring and photoionization detector (PID) monitoring.

Bourneside, Wentworth

August 2021

Risk Management Limited were employed to undertake a Phase II Site Investigation at an existing building to inform the design and erection of a detached, two-storey, replacement dwelling with basement served by a vehicular access ramp.

Field work

Intrusive fieldwork consisted of 3 No. cable percussion boreholes up to 20m depth, 2 No. Light-percussion boreholes up to 3.5m depth, 4 No. mechanically excavated Trial Pits, BRE365, soil infiltration tests, 4 No. MEXE probe test, 2 No. falling head permeability tests and land-borne gas monitoring.

Laboratory Testing

Laboratory testing included Particle Size Distribution tests, Asbestos identification, pH and Sulphate tests and Soil contamination test and WAC tests.

Roebuck Retail Park, Stevenage

July 2021

Risk Management Limited were employed on behalf of Craddys to undertake a Phase I, Phase II Site Investigation at an existing retail park to inform the design and construction of additional units.

Intrusive fieldwork consisted of 4 No light-percussion boreholes up to 7m depth, 3 No. hand and mechanically excavated Trial Pits, 4 No. MEXE probe test, 2 No. falling head permeability tests and land-borne gas monitoring.

Laboratory testing was undertaken in line with the Consulting Engineers, specification and included Particle Size Distribution tests, Asbestos identification, pH and Sulphate tests and Soil and Groundwater Contamination tests.

Groundwater and gas monitoring was undertaken.

Sundon Reservoir, Bedfordshire

June 2021

Risk Management Limited were employed on behalf of Affinity Water to undertake a Phase II Site Investigation at an existing reservoir to inform the design and construction of a new water condition plant.

Intrusive fieldwork consisted of 6 No. drive-in-sampler boreholes up to 9m depth, 2 No. hand auger boreholes up to 2m depth, TRL Dynamic Cone Penetrometer (DCP) tests up to 1.20m depth, 2 No. Soil Resistivity tests using a Wenner 4-point array, 3 No. falling head permeability tests and dynamic headspace analysis for Volatile Organic Compounds (VOC’s) using a Photo-inonisation Detector (PID).

Laboratory testing was undertaken in line with the Consulting Engineers, Mott MacDonalds, specification and included Natural Moisture Content tests, Atterberg Limit tests, Particle Size Distribution tests, Resistivity, MCV, MCV-Moisture Content Relationship, Lab CBR tests, Organic Matter, Carbonate Content, pH and Sulphate tests and Soil and Groundwater Contamination tests.

Groundwater and gas monitoring was undertaken over 4 visits and included purging, micro-purging and sampling of groundwater using either dedicated bailers or a Peristaltic Pump and low flow cell.

Sparsholt, Hampshire

May 2021

Risk Management Limited were instructed to undertake a Phase I Desk Study/Tier 1 Preliminary Risk Assessment and a Phase II Site Investigation at an agricultural plot of land for the development of 7 No. low-rise residential buildings.

Intrusive fieldwork consisted of 2 No. light percussion boreholes, 5 No. drive-in-sampler boreholes, 4 No. CBR tests, 2 No. gas/groundwater monitoring installations and 1 No. full BRE 365 Soil Infiltration test.

Laboratory testing included pH and Sulphate tests, Contamination tests, Waste Acceptance Criteria (WAC) tests and Asbestos identification.

South Kilburn, London

April 2021

Risk Management Limited were commissioned by Brent Council to undertake a Phase I Desk Study/Tier 1 Preliminary Risk Assessment and a Phase II Intrusive Site Investigation in South Kilburn, London for the construction of 16 No. 4-story residential terraced buildings.

Prior to site works a detailed UXO Risk Assessment was obtained and subsequent on-site UXO support was provided. Intrusive fieldwork consisted of 2 No. cable percussion boreholes to 25m depth, 6 No. drive-in-sampler boreholes to 5m depth, 6 No. CBR tests, 2 No. hand excavated trial pits and 2 No. gas/groundwater monitoring installations.

Laboratory testing included Moisture Content tests, Atterberg Limits, Quick Undrained Triaxial tests, pH and Sulphate tests, Contamination tests, Waste Acceptance Criteria (WAC) tests and Asbestos identification.

Reporting encompassed conventional foundations, pile design parameters, land borne gas assessment, road pavement design and ground remediation.

Harefield Reservoir, Middlesex

April 2021

Risk Management Limited were employed on behalf of Affinity Water to undertake a Phase II Site Investigation at an existing reservoir in order to assess the geotechnical, geo-environmental, geological and hydrogeological ground conditions.

Intrusive fieldwork consisted of 1 No. cable percussion borehole to 25m depth, 4 No. drive-in-sampler boreholes to 6m depth and dynamic headspace analysis for Volatile Organic Compounds (VOC’s) using a Photo-inonisation Detector (PID).

Laboratory testing included Natural Moisture Content tests, Atterberg Limit tests, Quick Undrained Triaxial Strength tests, Particle Size Distribution tests, Incremental Loading Oedometer tests, Organic Matter, pH and Sulphate tests, Soil and Groundwater Contamination tests and Soil Derived Leachate Suites and compliance tests for solid waste.

Groundwater and gas monitoring was undertaken over 6 visits and included purging, micro-purging and sampling of groundwater using either dedicated bailers or a Peristaltic Pump and low flow cell.

Oxhey Woods Reservoir, Middlesex

March 2021

Intrusive fieldwork consisted of 2 No. cable percussion boreholes to 15m and 25m depth, 3 No. drive-in-sampler boreholes to 6m depth and dynamic headspace analysis for Volatile Organic Compounds (VOC’s) using a Photo-inonisation Detector (PID).

Groundwater and gas monitoring was undertaken over 6 visits and included purging, micro-purging and sampling of groundwater using either dedicated bailers or a Peristaltic Pump and low flow cell.

Cullompton, Devon

March 2021

Risk Management Limited were instructed to undertake a Phase I Desk Study/Tier 1 Preliminary Risk Assessment and a Phase II Site Investigation at a parcel of land for the development of Cricket, Hockey, Tennis and Petanque pitches in Cullompton, Devon.

Intrusive fieldwork consisted of 7 No. light percussion boreholes, 3 No. CBR tests, 4 No. gas/groundwater monitoring installations and 2 No. full BRE 365 Soil Infiltration tests.

Laboratory testing included natural moisture content tests, Atterberg Limit tests, Quick Undrained Triaxial Strength tests, pH and Sulphate tests, Contamination tests, Waste Acceptance Criteria (WAC) tests and Asbestos identification.

Poole, Dorset

February 2021

Risk Management Limited were initially employed in January 2020 to undertake a Phase I Desk Study/Tier 1 Preliminary Risk Assessment and Phase II Intrusive Contamination Assessment at the former site of HMRC offices in Poole, Dorset. Following this RML were again employed in February 2021 to undertake two deep cable percussion boreholes to enable pile design and undertake gas monitoring.

Two 25m deep cable percussion boreholes were drilled at the site using a Dando 4000 rig, with in-situ SPT tests undertaken along with the retrieval of undisturbed U4/U100 samples for subsequent laboratory testing.

Laboratory testing included, Moisture Contents, Atterberg Limits, Undrained Triaxial Compression Tests, pH and Sulphate tests.

Littlehampton, West Sussex

January 2021

Risk Management Limited were employed to undertake winter groundwater monitoring at a site in Littlehampton, West Sussex for a furfure residential development.

A total of 12 No. drive-in-sampler boreholes were undertaken across the site to a depth of 5m and groundwater monitoring standpipes installed.

Groundwater monitoring visits were then subsequently undertaken fortnightly from January 2021 up until March 2021.

In April 2021 RML were then commissioned to undertake 12 No. BRE 365 Soil Infiltration tests across the site. In November 2021 RML were then commissioned to undertake further groundwater monitoring and Falling Head Permeability tests within the borehole installations.

Southampton, Hampshire

December 2020

Risk Management Limited were instructed to undertake a Phase I Desk Study/Tier 1 Preliminary Risk Assessment and a Phase II Site Investigation at The National Oceanography Centre in Southampton for the proposed erection of PV Panel Car Ports to external car parking areas.

Prior to intrusive fieldwork a Preliminary UXO Threat Assessment was undertaken and assessed a ‘high’ risk level to UXO at the site. Intrusive fieldwork was therefore overseen by a UXO specialist during drilling of 2 No. light percussion to 5m depth. A downhole magnetometer was used to ‘clear’ each 1m below drill depth before boring was continued.

Laboratory testing included Moisture Content tests, Atterberg Limits, Quick Undrained Triaxial tests, Particle Size Distribution tests, pH and Sulphate tests, Contamination tests and Asbestos identification.

Mitcham, Surrey

November 2020

Risk Management Limited were instructed to undertake a Phase I Desk Study/Tier 1 Preliminary Risk Assessment and a Phase II Site Investigation at a former rag & metal merchants in Mitcham, Surrey for the redevelopment into 25 self-contained residential units.

Intrusive fieldwork consisted of 2 No. cable percussion boreholes to 20m depth, 6 No. drive-in-sampler boreholes to 3m depth, 6 No. CBR tests and 1 No. gas/groundwater monitoring installation.

Reporting encompassed conventional foundations, pile design parameters, land borne gas assessment, road pavement design and ground remediation.

Hunstanton, Norfolk

October 2020

Risk Management Limited were employed to undertake a Phase I Desk Study/Tier 1 Preliminary Risk Assessment and a Phase II Site Investigation at a former infant school in Hunstanton, Norfolk for the redevelopment into residential accommodation.

Intrusive fieldwork consisted of 1 No. cable percussion borehole, 4 No. light percussion boreholes, 4 No. CBR tests, 2 No. wall cores, 4 No. hand excavated trial pits, 1 No. gas/groundwater monitoring installation and a full BRE 365 Soil Infiltration test.

Laboratory testing included pH and Sulphate tests, Contamination tests and Asbestos identification.

Mottingham, London

September 2020

Risk Management Limited were commissioned to undertake a Phase I Desk Study/Tier 1 Preliminary Risk Assessment and a Phase II Intrusive Site Investigation in Mottingham, London for the construction of a part 5-story part 6-storey residential building.

One 30m deep cable percussion borehole was drilled at the site using a Dando 4000 rig, with in-situ SPT tests undertaken along with the retrieval of undisturbed U4/U100 samples for subsequent laboratory testing and a gas/groundwater standpipe installed. Additional mechanically excavated trial pits were also undertaken across the site to confirm the geology.

Laboratory testing included, Moisture Contents, Atterberg Limits, Undrained Triaxial Compression Tests, Particle Size Distribution tests, pH and Sulphate tests, contamination tests, Waste Acceptance Criteria (WAC) tests and asbestos identification.

Pile design parameters, ground remediation and a landborne gas assessment were reported.

Welwyn, Hertfordshire

August 2020

Risk Management Limited were instructed to undertake an intrusive site investigation across an Industrial Estate in Welwyn, Hertfordshire in order to assess the ground conditions due to excessive movement in the road surfacing.

3 No. light percussion boreholes up to 5m deep, 10 No. Dynamic Probe tests up to 10m deep and 10 No. MEXE Probe CBR tests were undertaken across the site.

Laboratory testing included Particle Size Distribution tests.

Sonning, Berkshire

July 2020

Risk Management Limited were instructed to undertake a Phase I Desk Study/Tier 1 Preliminary Risk Assessment and a Phase II Site Investigation at a residential property in Sonning, Berkshire.

Intrusive fieldwork consisted of 4 No. light percussion boreholes up to 7m deep, 4 No. CBR tests, 3 No. gas/groundwater monitoring installations, 3 No. falling head permeability tests and a full BRE 365 Soil Infiltration test.

Laboratory testing included, Particle Size Distribution tests, pH and Sulphate tests, Contamination tests and Asbestos tests.

Penge, London

June 2020

Risk Management Limited were employed to undertake a Phase II Site Investigation to assess potential heave and enable new foundations for a side and rear extension to be designed by others.

Intrusive work included a 10m deep light percussion borehole with in-situ SPT tests. Laboratory testing included, Moisture Contents and Atterberg Limits.

A heave assessment in line with BRE Digest 412 was undertaken at the site along with the provision of allowable bearing pressures.

Chessington, Surrey

May 2020

Risk Management Limited were instructed in May 2020 to undertake an intrusive soil investigation to provide information to allow the Consulting Engineer to assess reasons for subsidence at a warehouse unit in Chessington, Surrey.

The investigation comprised of 4 No. Light Percussion boreholes up to a depth of 8.00m below existing ground level, 2 No. concrete cores, 2 No. drive-in-sampler boreholes, 2 No. mechanically excavated trial pits and 1 No. hand excavated trial pit.

Following retrieval of soil samples from the boreholes a heave assessment and desiccation analysis from moisture content tests and Atterberg Limit tests were undertaken along with filter paper suction tests and Quick Undrained Triaxial tests.

Blackford to Ickenham

April 2020

In April 2020 Risk Management Limited were instructed by Affinity Water to undertake an intrusive soil investigation to determine the proposed route for a 700mm diameter mains between Blackford Booster and Ickenham Booster. The project was part of a larger 20-year investment programme named Supply 2040

A total of 22 No. boreholes were drilled along 3 proposed linear routes for the mains pipeline using a tracked window sampler rig. Boreholes were drilled to depths of between 2.00m and 10.00m below existing ground level.

A large area of the site comprised a former Landfill and in addition to geotechnical testing on samples recovered to aid sub-structure foundation advice, numerous contamination and waste acceptance criteria (WAC) tests were scheduled to provide information to assist in the best possible route for the mains pipe.

Bletchingley, Surrey

March 2020

Risk Management Limited were instructed to undertake BRE 365 soakage tests and CBR testing at a playground in Bletchingley, Surrey in March 2020.

A total of 2 No. full BRE 365 soakage tests were undertaken using a mini-excavator and 2000 gallon lorry mounted water bowser in order to provide a soil infiltration rate.

4 No. MEXE Probe CBR tests were also undertaken for the purposes of road pavement design.

River Stour, Sandwich

February 2020

Risk Management Limited were commissioned to undertake a borehole investigation in February 2020 either side of the River Stour in Sandwich for a proposed new pipeline crossing.

A total of 6 No. Light Percussion boreholes were drilled up to a depth of 14m with in-situ SPT testing.

Laboratory testing included, Moisture Contents, Atterberg Limits, Undrained Triaxial Compression Tests, Particle Size Distributions, pH and Sulphate tests, Contamination testing of soil and groundwater and Asbestos identification.

Petersfield, Hampshire

January 2020

Risk Management Limited were instructed in January 2020 to undertake both a Phase I Desk Study and a Phase II Intrusive Site Investigation for a proposed residential ‘extra care’ facility and a ‘day-care’ centre in Petersfield, Hampshire.

The Site Investigation included 10 No. Light Percussion boreholes across the site along with subsequent land-borne gas monitoring in standpipe installations.

Kentish Town, London

December 2019

Risk Management Limited were initially employed in June 2015 to undertake a Preliminary Contamination Assessment at a former coachworks and vehicle repair garage in Kentish Town, London. RML were subsequently employed to undertake an additional Contamination Assessment to provide further information.

Seven drive-in-sampler boreholes with concrete coring were undertaken in order to install gas/groundwater monitoring standpipes, collect samples for contamination testing and further characterise the soil conditions on site.

Dynamic Headspace Analysis was undertaken using a Photoionisation Detector (PID). Groundwater analysis was undertaken using an interface probe, peristaltic pump and a multi-parameter water quality meter.

Retail Park, Coventry

November 2019

Risk Management Limited were commissioned to undertake a Warehouse Slab Investigation at a Retail Park in Coventry.

Prior to any intrusive work a UXO assessment found the site to be high risk from unexploded ordnance and consequently on-site support from UXO Specialists were employed during the work.

The project consisted of five cores through the concrete slab in 83mm diameter recovering cores of approximately 75mm in diameter. Following coring boreholes were sunk at two locations using a Premier tracked drive-in-sampler rig to ascertain the make-up beneath the slab.

During the borehole works the UXO specialist cleared each metre prior to drilling using a down-hole magnetometer.

Eel Pie Island, Twickenham

October 2019

Risk Management Limited were instructed to undertake a simple site investigation at a property located on Eel Pie Island located in the River Thames at Twickenham.

The work involved hand excavating four Trial Pits to determine foundation depths of concrete columns and a timber extension. The work was completed in one day with the Trial Pits photographed, logged, backfilled and reinstated.

Limehouse Cut

September 2019

Risk Management Limited were commissioned to undertake Trial Pits against existing foundations at basement and ground floor level across a Grade II listed warehouse in Limehouse Cut.

The work involved undertaking twenty-three hand excavated Trial Pits, assisted by a mini-excavator with breaker at certain locations, to find column/pad undersides. Trial Pits were logged, photographed before backfilling and reinstating as per the existing make-up.

In addition 3 No. concrete cores were undertaken across the site to assess the slab structure.

Romsey, Hampshire

August 2019

Risk Management Limited were employed to undertake both a Phase I, non-intrusive, Desk Study and a Phase II, intrusive, Site Investigation at a large parcel of land in Romsey, Hampshire.

The work involved thirteen light percussion boreholes, thirteen MEXE Probe CBR tests and twenty-two Soil Infiltration Tests. Falling head permeability tests and land -borne gas monitoring completed the fieldwork.

Comprehensive geotechnical and contamination testing were scheduled to provide allowable bearing pressures and advice for the remediation of the site.

Whitehawk Bus Depot, Brighton

July 2019

Risk Management Limited were commissioned by Derek Lofty & Associates to provide information on the existing slab and sub-soil conditions at Whitehawk Bus Depot in Brighton.

The investigation consisted of a number of concrete cores through the existing slab to note the overall depth of concrete and presence and size of reinforcement. Unconfined compression tests were subsequently undertaken on the cores retrieved to determine the core strength.

In addition to the slab assessment, three boreholes were sunk through the aforementioned cores to determine the underlying soil conditions and two hand excavated trial pits to assess the existing foundation make-up and depth. Contamination and Asbestos identification were also undertaken.

Brixton, South London

June 2019

Risk Management Limited were employed to undertake intrusive work at a Primary School in Brixton, South London to provide the Consulting Engineers, Pellings LLP, information on the existing structure.

The work consisted of six hand excavated trial pits against existing walls to uncover the foundation make up, dimensions and depth to underside. Furthermore, the internal walls and roof structure of the building were opened up in six areas to ascertain the make-up.

Winchester, Hampshire

May 2019

Risk Management Limited were employed by local house building company Alfred Homes to undertake a full BRE 365 Soil Infiltration Test at a property in the village of Weeke, Winchester.

A 3 ton mini excavator was utilised owing to the access restraints to dig a trench to 2.70m depth, with sides and base kept as straight as possible. The trench was then measured and the strata photographed and logged before filling using a 2000 gallon lorry mounted bowser. The rate of fall was then used to calculate a Soil Infiltration Rate (f) which facilitates drainage design by others.

Chesham, Buckinghamshire

April 2019

Risk Management Limited were commissioned to install 2 No. deep borehole Soakaway installations for a new care home in Chesham, Buckinghamshire.

The work involved undertaking two 15m deep cable percussion borehole in 8” diameter through the superficial beds and into the underlying Chalk strata. After a basic permeability test two 6” diameter soakaways were subsequently installed to 15m depth within each borehole.

Following installation three falling head tests within each soakaway were performed using a 2000-gallon lorry mounted bowser and hose and more than adequate soakage was observed.

Merton, Surrey

March 2019

Risk Management Limited were commissioned to undertake a Phase II, intrusive, Site Investigation at an existing Warehouse in Merton, Surrey. The investigation comprised verification of the existing slab condition and surrounding ground conditions for a small Barrier Booth building adjacent to the warehouse.

A concrete coring crew were subcontracted to core the existing warehouse slab in multiple locations with the resultant cores scheduled for Unconfined Compressive Strength testing. Drive-in-Sampler boreholes and MEXE Probe CBR tests were undertaken within the above-mentioned core holes to enable foundation design parameters.

Ashby-De-La-Zouch, Leicestershire

February 2019

Risk Management Limited were instructed to undertake a Land-Borne Gas Risk Assessment requested by North West Leicestershire District Council at a site of a former open-cast mine in Ashby-De-La-Zouch.

The work involved monitoring a number of gas standpipes, installed by RML across the site, at two-weekly intervals over a period of 18 weeks. Concentrations of Carbon Dioxide, Oxygen, Methane, Hydrogen Sulphide and gas flow were measured along with Volatile Organic Compounds (VOC’s).

Ashford, Kent

January 2019

Risk Management Limited were commissioned to undertake a Phase II Site Investigation at a parcel of land in Ashford, Kent for a proposed Extra Care Facility.

The underlying geology of Weald Clay can be difficult to penetrate with standard drive-in-sampler/window sampler techniques and consequently Cable Percussion techniques were employed to achieve the required 15m depth.

In addition to geotechnical testing and Waste Acceptance Criteria (WAC) tests, a full BRE 365 Soil Infiltration Test was also undertaken to inform drainage design and assess the capability of the underlying ground for potential soakaways.

Marketfield Way, Redhill

December 2018

Risk Management Limited were instructed to undertake a Phase I Desk Study and Phase II Site Investigation at a parcel of land adjacent to Redhill Train Station for a proposed multi-story residential development in the heart of Redhill town centre.

The underlying geology in Redhill, of the Sandgate Formation, required RML to employ Rotary drilling techniques in order to penetrate the sandstone to the required depth.

A comprehensive suite of both geotechnical and chemical tests were undertaken to inform the developer of foundation design parameters and environmental requirements for the site.

Tonbridge, Kent

November 2018

Risk Management Limited were commissioned by WCJ Structural Engineers to undertake a ‘heave assessment’ at a property in Tonbridge, Kent.

Due to excessive cracking on the property an 8m deep borehole was undertaken close to the area of interest. A moisture content profile was undertaken and, by comparing this to assumed ‘equilibrium’ natural moisture contents, a Heave Assessment was undertaken.

Sutton, Surrey

October 2018

Risk Management Limited work regularly with many local developers who often instruct us to undertake a ‘package’ consisting of a Phase I, non-intrusive, Desk Study and Phase II, intrusive, Site Investigation with contamination assessment, gas/groundwater monitoring and an Interpretative Report.

This package was utilised at a site in Sutton, Surrey, where the intrusive investigation comprised one 7m deep borehole with in-situ SPT testing and 3 shallow drive-in-sampler boreholes. Subsequent permeability, gas/groundwater monitoring was undertaken along with two contamination tests including asbestos.

Gladstone Parade, Dollis Hill, London

September 2018

Risk Management Limited were commissioned to undertake a Phase I, non-intrusive, Desk Study and Walkover Survey together with a Phase II, intrusive, Site Investigation at a parade of shops in Dollis Hill, London. The proposed development included the demolition of existing buildings and garages and the construction of a multi-storey building with associated landscaping and parking areas.

Two 20m deep cable percussion boreholes and six shallow drive-in-sampler boreholes were undertaken across the site to aid in providing geotechnical information. In addition, soakage tests to BRE 365 were undertaken to assess the soakage properties of the underlying geological strata and gas/groundwater monitoring performed.

Laboratory testing included the normal geotechnical testing as well as Oedometer tests and Contamination and Waste Acceptance Criteria (WAC) testing.

Pear Tree Street, London

August 2018

Risk Management Limited were commissioned to undertake a Phase I, non-intrusive, Desk Study and Walkover Survey and Phase II, intrusive, Site Investigation at an existing National Grid Car Park. The Phase I, non-intrusive, Desk Study found that the site lay within the boundary of the ‘Chartered Gas Works’ in 1877, by the end of the nineteenth Century the majority of the Gas Works had been removed.

A four to five storey office/residential building was proposed at the site. Due to the past usage of the site as a Gas Works the site was designated a ‘Red Site’ in accordance with the ‘Specification for Ground Investigation’ publications by the Site Investigation Steering Group of the ICE.

A total of three deep cable percussion boreholes and six shallow drive-in-sampler boreholes were undertaken across the site to provide suitable information to allow for foundation design. Subsequent gas/groundwater monitoring was undertaken on six occasions along with organics measured using a MiniRae Lite PID.

Laboratory testing included the normal geotechnical testing as well as Coal Tar, SVOC and TOC analysis and groundwater contamination testing owing to the past usage.

Following on from the Phase I and II work noted above a Phase III Remediation Method Statement and Phase IV Verification Report were undertaken.

Childrey Warren, Wantage

July 2018

Risk Management Limited were contracted to undertake an intrusive Site Investigation along the linear route for a new watermain running from Childrey Warren Water Treatment Works (WTW) to Lark Hill Reservoir for Thames Water. Thames Water are committed to ceasing water abstraction at Childrey Warren WTW and the proposal to construct a link main between Lark Hill Reservoir and Childrey Warren WTW would allow this.

A total of fifteen geotechnical Trial Pits were undertaken using a Kubota mini-excavator and eight Rotary Cored boreholes, up to 25m deep, using a tracked Commachio 250 drilling rig at locations along the proposed link main route.

Laboratory testing included, moisture contents, Atterberg Limits, CBR tests, Compaction tests, pH and Water Soluble Sulphate tests, Saturation Moisture Content, Chalk Crushing Value, Natural Moisture Content of Chalk, Unconfined Compressive Strength and Point Load Index of Chalk and Contamination testing.

Melior Place, London

June 2018

Risk Management Limited were contracted to undertake a Phase II, intrusive, Site Investigation at a warehouse unit in Southwark, London. The scope for the investigation required a deep borehole to at least 20m depth to enable foundation and pile design.

Considering the limited headroom and access difficulties Risk Management Limited utilised a low-headroom ‘cut-down’ cable percussion rig in order to achieve the required depth. The ‘cut-down’ rig is ideal in environments where depths in excess of 10m are required, or tough ground conditions require a cable percussion rig, and headroom is limited.

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