PHASE I GEO-ENVIRONMENTAL SITE ASSESSMENT
Kenyons Lane Lydiate Liverpool
Prepared for:
Mr. Norman Harrison Mortons Dairies
Kenyons Lane
Maghull Merseyside L31 0BP
Report Ref: 12-128-r1 Date Issued: December 2017
Kenyons Lane, Liverpool Phase I Geo-Environmental Site Assessment December 2017
E 3P
Heliport Business Park, Liverpool Road, Eccles, Manchester, M30 7RU
Tel : + 00 (0) 161 707 9612 http: \\www. e3p.co.uk
Registered in England No.: 807255262 QUALITY ASSURANCE
REMARKS Final
DATE December 2017
PREPARED BY J. Carrick
QUALIFICATIONS BSc
SIGNATURE
CHECKED BY S. Cox
QUALIFICATIONS BSc (Hons), FGS, AIEMA, MIEnvSci, CEnv
SIGNATURE
AUTHORISED BY M. Dyer
QUALIFICATIONS BSc (Hons), FGS, AIEMA, MIEnvSci, CEnv
SIGNATURE
PROJECT NUMBER 12-128
IMS Template Reference: QR011
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Kenyons Lane, Liverpool Phase I Geo-Environmental Site Assessment December 2017
EXECUTIVE SUMMARY Site Address Kenyons Lane, Liverpool, L31 0BP Grid Reference E338160, N403760 Site Area 9.83 Hectares The subject site is an irregular shaped parcel of land in a semi-rural, residential area on the edge of Liverpool.
The site is currently in agricultural use. Open fields are present across most of the site. A dairy is in the south sector, fronting onto Kenyons Lane, Current Site Use comprising large commercial buildings and above ground storage tanks. External yard areas for vehicular access and parking surrounds the buildings. A farm steading is present in the north sector and extends to the northeast, with portal frame sheds comprising corrugated sheets on the walls and roofs that may contain ACM. An above ground fuel storage tank is present on the site. E3P understands that the site is proposed to be redeveloped for low rise Proposed residential end use. A proposed site layout plan shows 200no. units with Development associated garden and landscaped areas, estate roads, pavements and infrastructure. Drift Geology Shirdley Hill Sand Formation Bedrock Geology Sherwood Sandstone Group Secondary A Aquifer underlain by a Principal Hydrogeology Aquifer (Bedrock Geology). A drain is present in the south sector adjacent Hydrology Environmental to the dairy. Sudell Brook is 204m northeast. Setting Flood Risk The site is not within a flood prone area.
Existing trees and buildings may provide Ecology habitat for protected species such as bats. Compressible Ground and No hazard identified in data searches. Subsidence Hazards Historical mapping shows that the site has been in agricultural use throughout its mapped history. A farm steading to the northeast extended into the site in the early 1900s, with large agricultural sheds built in the north Site History sector. Buildings identified as a dairy were built in the south sector in the mid-1900s. The configuration of buildings in the north and south sectors has altered over time, indicating construction and demolition activities. A formal drainage survey has not been completed, however a review of United Utility Locations Utilities records indicates the presence of foul and surface water sewers within the immediate surrounding roadways. Landfill Sites & There are no landfill sites, Waste Transfer Sites, or Waste Treatment or Ground Gases Disposal Sites recorded within 500m of the site. No invasive plant species were identified during the site walkover; however, Invasive Plant the presence cannot be ruled out due to the time of the year of the site Species inspection in addition to the potential for new growth. A Habitat Survey may be required. Radon Unaffected – No special precaution required. Coal Mining / Land The site is not within an area affected by coal mining. Stability
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Kenyons Lane, Liverpool Phase I Geo-Environmental Site Assessment December 2017
EXECUTIVE SUMMARY
Geotechnical Risk Based on the desk study information, the following geotechnical assessment has been made:
Considering historical development around the farm steading in the northern sector and dairy in the southern sector, Made Ground and obstructions are anticipated. Existing buildings will require demolition with all relic foundations grubbing out, prior to the construction of the proposed development;
A historically infilled pond on the west boundary of the site is a potential source of alluvial deposits, silts and possible organic peat deposits, as well as Made Ground which will require investigation to determine the requirement for any abnormal foundations; and,
Investigation will be required to assess the ground conditions across the site and undertake in-situ geotechnical testing to determine the likely foundation solutions. Contaminated Land Risk Assessment Human Health Agricultural land use, with farm buildings, dairy, fuel storage and use of pesticides, as well as Made Ground, represent potential sources of heavy metal, polycyclic aromatic hydrocarbon (PAH), petroleum hydrocarbon, asbestos, and ground gas. Considering the potential for direct contact during development works and within proposed gardens and landscaping areas, these potential sources of soil and groundwater contamination represent a moderate risk to construction workers and residential end users. An intrusive ground investigation to identify, and assess for the presence of these contaminants is required to facilitate further risk assessment, and determine appropriate remediation and / or mitigation measures.
Controlled Waters Agricultural land use, with farm buildings, dairy, and fuel storage, as well as Made Ground, represent potential sources of mobile hydrocarbon contamination. Permeable drift deposits may facilitate the migration of mobile contamination, if present. Considering the presence of the Principal Aquifer and surface watercourse on site, a high risk to controlled waters is identified. Intrusive investigation with chemical analysis of soil and groundwater samples is recommended to assess the presence of mobile contaminants and facilitate further risk assessment.
Ground Gas Made Ground associated with historical development, and the infilled pond represents potential source of hazardous ground gases. Carbon dioxide and methane are associated with asphyxiation and explosive risks. Installation of monitoring wells during intrusive ground investigation is recommended to assess for the presence of ground gases and facilitate further risk assessment. Recommendations A detailed Phase II intrusive Geo-Environmental Ground Investigation should be undertaken in order to confirm the findings of the initial conceptual site model and value engineer a development solution. A pre-demolition asbestos survey will be required. A habitat survey may be required.
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Kenyons Lane, Liverpool Phase I Geo-Environmental Site Assessment December 2017
Table of Contents
1. INTRODUCTION ...... 5 1.1 Background ...... 5 1.2 Proposed Development ...... 5 1.3 Objectives ...... 6 1.4 Limitations ...... 6 1.5 Sources of Information ...... 6 1.6 Confidentiality ...... 6
2. SITE SETTING ...... 7 2.1 Site Details ...... 7 2.2 Current Site Use ...... 7 2.3 Surrounding Area ...... 8
3. SITE HISTORY ...... 9 3.1 On-Site Historical Development ...... 9 3.2 Off-Site Historical Development ...... 10 3.3 Planning History ...... 11
4. ENVIRONMENTAL SETTING ...... 12 4.1 Geology and Hydrogeology ...... 12 4.2 Geotechnical Data ...... 12 4.3 Coal Mining ...... 12 4.4 Brine Workings ...... 13 4.5 Hydrology ...... 13 4.6 Radon Risk Potential ...... 13 4.7 Industrial Land Uses ...... 13 4.8 Sensitive Land Uses ...... 13 4.9 Site Sensitivity Assessment ...... 13 4.10 Preliminary Geotechnical Assessment ...... 14
5. CONSULTATIONS ...... 15 5.1 Landfill Sites and Waste Treatment Sites ...... 15 5.2 Regulatory Database ...... 15
6. INITIAL CONCEPTUAL SITE MODEL ...... 16 6.1 Initial CSM ...... 16
7. CONCLUSIONS AND RECOMMENDATIONS ...... 18
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Kenyons Lane, Liverpool Phase I Geo-Environmental Site Assessment December 2017
APPENDICES Appendix I Limitations Appendix II Glossary Appendix III Drawings
Drawing No 12-128-001 – Site Location Plan Drawing No 12-128-002 – Proposed Development Layout Drawing No 12-128-003 – Historical Features Plan
Appendix IV Photographs Appendix V Historical Maps
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Kenyons Lane, Liverpool Phase I Geo-Environmental Site Assessment December 2017
1. INTRODUCTION
1.1 Background
E3P Ltd has been commissioned by Mr. Norman Harrison to undertake a Phase I Geo- Environmental Site Assessment at Kenyons Lane in Lydiate, Liverpool.
This report is required to determine potential contaminated land and geotechnical liabilities associated with a proposed future residential development.
1.2 Proposed Development
E3P understands that Mr. Norman Harrison proposes to develop the subject site for low rise residential end use. A proposed plot development layout shows 200 No. low rise residential dwellings with associated garden and landscaped areas, estate roads, pavements and infrastructure.
The proposed development layout is included as Drawing 12-128-002 (Appendix III) and a snapshot is shown in Figure 1.1 below:
Figure 1.1 Snapshot of Proposed Development Layout
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Kenyons Lane, Liverpool Phase I Geo-Environmental Site Assessment December 2017
1.3 Objectives
The objectives of the Geo-Environmental Investigation are to:
Review historical plans, geology, hydrogeology, site sensitivity, flood-plain issues, mining records and any local authority information available in order to complete a Desk Study in line with Environment Agency (EA) document Model Procedures for the Management of Contaminated Land (Contaminated Land Report 11 (CLR11));
Assess the implications of any potential environmental risks, liabilities and development constraints associated with the site in relation to the future use of the site and in relation to off-site receptors;
Assess the desk study information and where possible, provide preliminary recommendations in relation to foundations, pavement construction and floor slabs; and,
Provide recommendations regarding future works required and undertake a preliminary pre-construction cost appraisal.
1.4 Limitations
The limitations of this report are presented in Appendix I.
1.5 Sources of Information
Background information was sought from the following sources:
Envirocheck Search; Historical mapping dated 1849 to 2017. A selection of historical maps are reproduced in Appendix V; On-line planning records held by Sefton Council; Consultations with representatives of the Sefton Council; Environment Agency Groundwater Vulnerability Map (www.environment- agency.gov.uk/wiyby); Radon: Guidance on protective measures for new buildings (BRE Document BR 211, 2007); and, British Geological Survey Map.
1.6 Confidentiality
E3P has prepared this report solely for the use of the Client and those parties with whom a warranty agreement has been executed, or with whom an assignment has been agreed. Should any third party wish to use or rely upon the contents of the report, written approval must be sought from E3P; a charge may be levied against such approval.
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Kenyons Lane, Liverpool Phase I Geo-Environmental Site Assessment December 2017
2. SITE SETTING
2.1 Site Details
Site Address Kenyons Lane, Liverpool, L31 0BP National Grid Reference E338160, N403760 Site Area 9.83 Hectares
All acronyms used within this report are defined in the Glossary presented in Appendix II.
A site location map is presented in Appendix III as Drawing 12-128-001.
2.2 Current Site Use
E3P has undertaken a site walkover of the entire site and a description of the key findings is summarised in Table 2.1.
Table 2.1 Site Description Occupancy/use The subject site is an irregular shaped parcel of land in a semi-rural, residential area on the edge of Liverpool.
The site is currently in agricultural use. Open fields are present across most of the site. Mortons Dairies is identified in the southern sector, fronting onto Kenyons Lane, comprising large commercial buildings and above ground storage tanks. External yard areas for vehicular access and parking surrounds the buildings.
A farm steading is present in the north sector and extends to the northeast, with portal frame sheds comprising corrugated sheets on the walls and roofs. Structures The dairy in the southern sector comprises large commercial buildings steel portal framed buildings with some brick buildings and above ground storage tanks.
Portal frame sheds are present in the north sector, with corrugated sheets on the walls and roofs Access Vehicular access is available via existing entrances off Kenyons Lane to the south, and Liverpool Road to the northwest.
Slope The site and surrounding area slopes down-gradient from south to north.
Retaining None. structures Surface Cover (%) Buildings: 10% Hardstand: 5% Soft cover: 85% Vegetation/Ecology The site is predominantly utilised for agricultural use with the site covered in grassed land and evidence of recent ploughing. This would suggest the site has been utilised for crop production instead of grazing land. Mature trees and overgrown vegetation are present along the site boundaries and along field boundaries.
Existing buildings and trees may support protected species such as bats. A Habitat Survey may be required to support the planning application.
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Kenyons Lane, Liverpool Phase I Geo-Environmental Site Assessment December 2017
Hazardous Material Above-ground Storage Tanks (UST) were observed at the site during the Storage preliminary site walkover in the southern sector as part of Mortons Dairies, to the north of the main works building. The exact size of the tank is not evident however it appears to be circa 30,000L and contains diesel oil.
Asbestos ACM may be present in the fabric of the existing buildings. A pre-demolition Containing Material asbestos survey will be required within existing buildings within the site boundary. (ACM) Polychlorinated There is no equipment on site that may contain PCBs. Biphenyls (PCBs) Waste Storage Due to existing agricultural land use across the site and a dairy in the south sector, potentially hazardous waste streams may have been generated at the site, however, none were observed during the preliminary site inspection. Drainage A formal drainage survey has not been completed, however a review of United Utilities records indicates the presence of foul and surface water sewers within the immediate surrounding roadways.
2.3 Surrounding Area
The surrounding area land uses are summarised in Table 2.2.
Table 2.2 Surrounding Land Uses DIRECTION LAND USE North Highway and farm steading East Highway and agricultural fields beyond. South Highway and residential units. West Residential units and school.
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Kenyons Lane, Liverpool Phase I Geo-Environmental Site Assessment December 2017
3. SITE HISTORY
3.1 On-Site Historical Development
A review of historical mapping pertinent to the site is summarised in Table 3.1 below. In addition, historical site features are presented on Drawing No 12-128-003 in Appendix III.
Table 3.1 Site Historical Development MAP HISTORICAL LAND USE HISTORICAL MAP EXCERPT EDITION
The site comprises entirely open grassed land 1894 with a series of field boundaries crossing 1:10,560 through the site. A pond is present on the western boundary.
Open fields are across most of the site. Large 1909 buildings, possibly associated with the 1:10,560 neighbouring farm steading are shown in the northern sector.
Additional buildings are shown in the north 1955 and south sectors.
1:10,000 The pond on the west boundary is no longer shown, indicating infilling activities.
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MAP HISTORICAL LAND USE HISTORICAL MAP EXCERPT EDITION
The configuration of buildings in the north sector has changed, indicating construction 1974-75 and demolition activities. 1:10,000 The building on the south boundary is identified as a dairy.
1986 Additional buildings are shown in the north 1:10,000 and south sectors.
2017 Additional buildings are shown in the north 1:10,000 and south sectors.
3.2 Off-Site Historical Development
A review of potentially contaminative uses identified on historical Ordnance Survey maps within a 250m radius of the site is summarised overleaf in Table 3.2.
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Table 3.2 Surrounding Potentially Contaminative Land Uses. SURROUNDING FEATURE DISTANCE DATES DIRECTION
Farm steading Pre 1849 – Pre 1974 50m North Then nursery Pre 1974 - Present Farm steading 0m Pre 1894 – Present Northwest Nursery 40m Pre 1986 - Present West Garage 240m Pre 1962 - Present South Farm steading 240m Pre 1849 – Pre 1986 Southwest
3.3 Planning History
E3P has undertaken a search of on-line planning records held by Sefton Council.
There have been various planning applications to alter and extend the dairy in the southern sector and the agricultural buildings in the northern sector.
There are various applications to alter / extend residential properties in the immediate vicinity.
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Kenyons Lane, Liverpool Phase I Geo-Environmental Site Assessment December 2017
4. ENVIRONMENTAL SETTING
4.1 Geology and Hydrogeology
The British Geological Survey (BGS) map for the site, (1:50,000, Solid & Drift edition) and online records indicates the site is underlain by the geological sequence presented in Table 4.1.
Table 4.1 Summary of Underlying Geology GEOLOGICAL AQUIFER CLASSIFICATION DESCRIPTION UNIT CLASSIFICATION Drift Shirdley Hill Sand Formation Sand Secondary A Aquifer Solid Sherwood Sandstone Group Sandstone Principal Aquifer
No BGS boreholes are identified with 250m of the site.
No faults are identified within the vicinity of the site.
The Envirocheck Report indicates that the site is located within a Total Catchment of a Groundwater Source Protection Zone.
The closest abstraction licence is from surface water 230m northeast for irrigation. The closest groundwater abstraction is 504m north for irrigation. A potable groundwater abstraction is located 729m north east.
A drain is present in the south sector adjacent to the dairy. Sudell Brook is 204m northeast.
Based on the local topography and the location of surface watercourses, it is considered likely that shallow groundwater, if present, will flow in a northerly direction, following the topographical gradient towards Sudell Brook to the north.
4.2 Geotechnical Data
Geotechnical Data presented within a commercially available environmental database is summarised within Table 4.2.
Table 4.2 Summary of Geotechnical Data HAZARD DESIGNATION
Shrink-Swell Clay No Hazard Landslides Very Low Risk Ground Dissolution No Hazard Compressible Ground No Hazard Collapsible Deposits Very Low Risk Running Sand Low Risk
4.3 Coal Mining
The Envirocheck Report states the site is in an area is not affected by coal mining.
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4.4 Brine Workings
The site is not located within the Cheshire Brine Compensation District.
4.5 Hydrology
Surface water features within 250m of the subject site are summarised in Table 4.3.
Table 4.3 Surface Water Features
SURFACE WATER FEATURE QUALITY DISTANCE (m) DIRECTION
Drain N/A 0m South Sudell Brook N/A 204m Northeast Downholland (Lydiate) Bk Good 235m Northeast
The site is located within a currently defined Flood Risk Zone 1; defined as land assessed as having less than 1 in 1,000 annual probability of river or sea flooding (<0.1%), and is therefore considered to be unaffected by river flooding.
4.6 Radon Risk Potential
The Envirocheck Report indicates the site is situated in an area where less than 1% of homes are above the Action Level and that the BGS reports that full radon protective measures are not necessary in the construction of new dwellings or extensions.
4.7 Industrial Land Uses
An entry on the Contemporary Trade Directory is identified on the site, associated with the dairy in the south sector.
There are 3no. entries on the Contemporary Trade Directory for industrial land uses within 250m of the site. The closest is for furniture repairing and restoration, 6m northeast, but is shown as inactive. A petrol filling station is identified 240m south.
4.8 Sensitive Land Uses
The closest residential properties adjacent to the west and south boundaries of the site. A school is immediately west of the site.
The site is within an area of adopted green belt. No other environmentally sensitive land uses have been identified within close proximity to the site.
4.9 Site Sensitivity Assessment
The site is assessed to be located within a High sensitivity setting as discussed within Table 4.4.
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Table 4.4 Site Sensitivity Assessment SENSITIVITY PROFILE DISCUSSION RATING Groundwater Source The site is located within a Total Catchment of Protection Zone or Drinking HIGH a Groundwater Source Protection Zone. Water Safeguard Zone The closest groundwater abstraction is 504m Distance to the closest north for irrigation. A potable groundwater MODERATE groundwater abstraction point. abstraction is located 729m northeast. Aquifer Classification in Shirdley Hill Sand Formation is classified as a MODERATE Superficial Drift Deposits. Secondary A Aquifer. Aquifer classification in Sherwood Sandstone Group is classified as a HIGH Bedrock. Principal Aquifer. Is the site underlain by low permeability Drift to depths in Permeable sand is anticipated. HIGH excess of 10.0m? Is the site located within 50m of A water course is identified on site. HIGH a surface watercourse? Sensitive land uses within Residential properties are adjacent to the west close proximity (e.g. and south boundaries of the site. A school is HIGH residential, school, nursery, immediately west of the site. local nature reserves etc.)
Overall Site Environmental Sensitivity HIGH
4.10 Preliminary Geotechnical Assessment
Based on the desk study information, the following geotechnical assessment has been made:
Considering historical development around the farm steading in the northern sector and dairy in the southern sector, Made Ground and obstructions are anticipated. Existing buildings will require demolition with all relic foundations grubbing out, prior to the construction of the proposed development;
A historically infilled pond on the west boundary of the site is a potential source of alluvial deposits, silts and possible organic peat deposits, as well as Made Ground which will require investigation to determine the requirement for any abnormal foundations; and,
Investigation will be required to assess the ground conditions across the site and undertake in-situ geotechnical testing to determine the likely foundation solutions.
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Kenyons Lane, Liverpool Phase I Geo-Environmental Site Assessment December 2017
5. CONSULTATIONS
5.1 Landfill Sites and Waste Treatment Sites
There are no landfill sites, Waste Transfer Sites, or Waste Treatment or Disposal Sites recorded within 500m of the site.
5.2 Regulatory Database
The information summarised in Table 5.1 has been obtained from a commercially available environmental database. The summary table only includes records from within 250m of the subject site and not otherwise detailed in the report.
Table 5.1 Summary of Environmental Data RECORD ENTRIES DETAILS WITHIN 250m
Contaminated Land Register 0 None Identified (N/A). Entries and Notices Authorised industrial 0 N/A processes (IPC/IPPC/LAPPC). Fuel Stations Entries 1 A petrol station is 240m south. Licensed radioactive 0 N/A substances Enforcements, prohibitions or 0 N/A prosecutions Discharge consents for sewage discharges are Discharge Consents 4 240m northeast. A minor incident was recorded in 1995 Pollution Incidents 1 associated with sewage on the site. Consents issued under the Planning (Hazardous 0 N/A Substances) Act 1990 Control of Major Accident 0 N/A Hazard (COMAH) sites
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6. INITIAL CONCEPTUAL SITE MODEL
6.1 Initial CSM
In accordance with Environment Agency, CLR 11 (2004) and BSI 10175 (Code of Practice for Investigation of Potentially Contaminated Land), E3P Ltd has developed an initial CSM to identify potential contamination sources, migration pathways and receptors within the study area. This is summarised within Table 6.1.
Table 6.1 Initial Conceptual Site Model SOURCE PATHWAY RECEPTOR Human Health
Heavy metals / Semi Volatile Dermal Contact and Ingestion Organic Compounds (SVOC) & Construction Workers Consumption of Home-grown pesticides associated with Made Residential End Users Ground and agricultural land use Produce Discussion:
Agricultural land use, with farm buildings and dairy, represents potential sources of heavy metals and PAHs. Made Ground associated with the historical development and infilled pond, may contain ash deposits, a source of heavy metals and PAHs. Furthermore, due to the use of the site as crop production, there may be a low risk potential source of pesticides within the near surface ground conditions.
Heavy metals and non-volatile PAHs may pose a short-term risk to construction workers who may be exposed to impacted soils during earthworks. Construction works must be undertaken using the appropriate Personal Protective Equipment (PPE) to remove this risk.
Future residential end users may be exposed to impacted soils within gardens and landscaped areas. An intrusive ground investigation is required to identify and assess for the presence of heavy metals and PAHs, to facilitate further risk assessment, and to determine appropriate remediation and / or mitigation measures. Volatile hydrocarbon compounds, Volatilisation / Accumulation, Construction Workers, diesel oils associated with current Vapour Inhalation Residential End Users and historical site uses Discussion:
Agricultural land use, with farm buildings, dairy, and fuel storage, as well as Made Ground, represent potential sources of VOCs. Furthermore, a diesel above ground storage tank is present in the southern sector of the site in Mortons dairies which represents a potential source of diesel range hydrocarbons from any former leakages into the ground.
VOCs pose a short-term risk to construction workers during earthworks. Construction works should be undertaken using the appropriate Personal Protective Equipment (PPE) to remove this risk.
Proposed residential end users may be exposed to VOCs via inhalation and accumulation of vapours in indoor space, representing a long-term risk. An intrusive ground investigation with chemical analysis of soil and groundwater samples is recommended to investigate the presence of VOCs and facilitate further risk assessment.
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SOURCE PATHWAY RECEPTOR
Asbestos Containing Materials Construction Workers (ACM) within Made Ground and Fibre / Dust Inhalation Residential End Users existing buildings Third Party Property Discussion:
Existing buildings and Made Ground may contain ACM. Disturbance of ACM may give rise to dust generation, posing a risk to adjacent site users, construction workers, and residential end users.
A pre-demolition asbestos survey is required. An intrusive ground investigation should test and assess for the presence of asbestos within Made Ground to facilitate further risk assessment. Hazardous Ground Gases
Methane and Carbon Dioxide Inhalation Construction Workers associated with Made Ground and infilled pond Accumulation Residential End Users Discussion:
Made Ground associated with historical development, as well as the infilled pond represent potential sources of hazardous ground gases. Carbon dioxide and methane are associated with asphyxiation and explosive risks. Installation of monitoring wells during intrusive ground investigation is recommended to assess for the presence of ground gases and facilitate further risk assessment. Controlled Waters
Hydrocarbon compounds Principal Aquifer associated with current and Vertical / Lateral Migration historical site uses Surface water course on site Discussion:
Agricultural land use, with farm buildings, dairy, and fuel storage, as well as Made Ground, represent potential sources of mobile hydrocarbon contamination. Permeable drift deposits may facilitate the migration of mobile contamination, if present. Considering the presence of the Principal Aquifer and surface water course on site, a high risk to controlled waters is identified. Intrusive investigation with chemical analysis of soil and groundwater samples is recommended to assess the presence of mobile contaminants and facilitate further risk assessment. It is likely that considering the location of the site within a Groundwater SPZ III, the Environment Agency will request a planning condition with regards to intrusive piling methods. Buildings and Infrastructure pH & Sulphate Corrosion of Concrete Foundations / Concrete Discussion
Presence of pH and sulphate within Made Ground deposits may result in corrosion of buried concrete within the proposed development. Intrusive investigation with chemical analysis of soil samples is recommended to confirm the levels of pH and sulphate within Made Ground deposits and thus determine the concrete classification. Ecology None Identified Lateral Migration N/A Discussion
No significant ecological receptors are identified.
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7. CONCLUSIONS AND RECOMMENDATIONS
Site Summary The site has been in agricultural use throughout its mapped history. A farm steading with large agricultural sheds is present in the north sector, and a dairy with buildings and above ground storage tanks is in the south sector. An above ground fuel storage tank is present on the site to the north of the main dairy works buildings.
It is likely that existing buildings and structures on the site contain ACM.
Made Ground associated with the historical development is anticipated in addition to potential deep Made Ground and / or alluvial deposits in the locality of the infilled pond.
Agricultural land use, with farm buildings, dairy, and fuel storage, as well as Made Ground, are potential sources of heavy metal, polycyclic aromatic hydrocarbon (PAH), petroleum hydrocarbon, asbestos and ground gas. Contamination Issues Agricultural land use, with farm buildings, dairy, and fuel storage, as well as Made Ground, represent potential sources of heavy metal, polycyclic aromatic hydrocarbon (PAH), petroleum / diesel hydrocarbon, asbestos, and ground gas. Considering the potential for direct contact during development works and within Human Health proposed gardens and landscaping areas, these potential sources of soil and groundwater contamination represent a moderate risk to construction workers and residential end users. An intrusive ground investigation to identify, and assess for the presence of these contaminants is required to facilitate further risk assessment, and determine appropriate remediation and / or mitigation measures. Agricultural land use, with farm buildings, dairy, and fuel storage, as well as Made Ground, represent potential sources of mobile hydrocarbon contamination. Permeable drift deposits may facilitate the migration of mobile contamination, if Controlled present. Considering the presence of the Principal Aquifer and surface water Waters course on site, a high risk to controlled waters is identified. Intrusive investigation with chemical analysis of soil and groundwater samples is recommended to assess the presence of mobile contaminants and facilitate further risk assessment. Made Ground associated with historical development and the infilled pond represent potential sources of hazardous ground gases. Carbon dioxide and Ground Gas methane are associated with asphyxiation and explosive risks. Installation of monitoring wells during intrusive ground investigation is recommended to assess for the presence of ground gases and facilitate further risk assessment. Potable Based on existing information, it is considered the site will be suitable for PE water Waters supply pipework.
Geotechnical Issues Based on the desk study information, the following geotechnical assessment has been made:
Considering historical development around the farm steading in the northern sector and dairy in the southern sector, Made Ground and obstructions are anticipated. Existing buildings will require demolition with all relic foundations grubbing out, prior to the construction of the proposed development;
A historically infilled pond on the west boundary of the site is a potential source of alluvial deposits, silts and possible organic peat deposits, as well as Made Ground which will require investigation to determine the requirement for any abnormal foundations; and,
Investigation will be required to assess the ground conditions across the site and undertake in- situ geotechnical testing to determine the likely foundation solutions.
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END OF REPORT
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APPENDIX I LIMITATIONS
Kenyons Lane, Liverpool Phase I Geo-Environmental Site Assessment December 2017
1. This report and its findings should be considered in relation to the terms of reference and objectives agreed between E3P and the Client as indicated in Section 1.2.
2. For the work, reliance has been placed on publicly available data obtained from the sources identified. The information is not necessarily exhaustive and further information relevant to the site may be available from other sources. When using the information it has been assumed it is correct. No attempt has been made to verify the information.
3. This report has been produced in accordance with current UK policy and legislative requirements for land and groundwater contamination which are enforced by the local authority and the Environment Agency. Liabilities associated with land contamination are complex and requires advice from legal professionals.
4. During the site walkover reasonable effort has been made to obtain an overview of the site conditions. However, during the site walkover no attempt has been made to enter areas of the site that are unsafe or present a risk to health and safety, are locked, barricaded, overgrown, or the location of the area has not be made known or accessible.
5. Access considerations, the presence of services and the activities being carried out on the site limited the locations where sampling locations could be installed and the techniques that could be used.
6. Site sensitivity assessments have been made based on available information at the time of writing and are ultimately for the decision of the regulatory authorities.
7. Where mention has been made to the identification of Japanese Knotweed and other invasive plant species and asbestos or asbestos-containing materials this is for indicative purposes only and do not constitute or replace full and proper surveys.
8. The executive summary, conclusions and recommendations sections of the report provide an overview and guidance only and should not be specifically relied upon without considering the context of the report in full.
9. E3P cannot be held responsible for any use of the report or its contents for any purpose other than that for which it was prepared. The copyright in this report and other plans and documents prepared by E3P is owned by them and no such plans or documents may be reproduced, published or adapted without written consent. Complete copies of this may, however, be made and distributed by the client as is expected in dealing with matters related to its commission. Should the client pass copies of the report to other parties for information, the whole report should be copied, but no professional liability or warranties shall be extended to other parties by E3P in this connection without their explicit written agreement there to by E3P.
10. New information, revised practices or changes in legislation may necessitate the re-interpretation of the report, in whole or in part.
Kenyons Lane, Liverpool Phase I Geo-Environmental Site Assessment December 2017
APPENDIX II GLOSSARY
Kenyons Lane, Liverpool Phase I Geo-Environmental Site Assessment December 2017
TERMS
AST Above Ground Storage Tank SGV Soil Guideline Value BGS British Geological Survey SPH Separate Phase Hydrocarbon Total Petroleum Hydrocarbon (Criteria BSI British Standards Institute TPH CWG Working Group) BTEX Benzene, Toluene, Ethylbenzene, Xylenes SPT Standard Penetration Test CIEH Chartered Institute of Environmental Health SVOC Semi Volatile Organic Compound CIRIA Construction Industry Research Association UST Underground Storage Tank CLEA Contaminated Land Exposure Assessment VCCs Vibro Concrete Columns CSM Conceptual Site Model VOC Volatile Organic Compound Dense Non-Aqueous Phase Liquid (chlorinated DNAPL WTE Water Table Elevation solvents, PCB) DWS Drinking Water Standard m Metres EA Environment Agency km Kilometres EQS Environmental Quality Standard % Percent GAC General Assessment Criteria %v/v Percent volume in air GL Ground Level mb Milli Bars (atmospheric pressure) GSV Gas Screening Value l/hr Litres per hour HCV Health Criteria Value µg/l Micrograms per Litre (parts per billion) ICSM Initial Conceptual Site Model ppb Parts Per Billion Light Non-Aqueous Phase Liquid (petrol, diesel, LNAPL mg/kg Milligrams per kilogram (parts per million) kerosene) ND Not Detected ppm Parts Per Million LMRL Lower Method Reporting Limit mg/m3 Milligram per metre cubed NR Not Recorded m bgl Metres Below Ground Level PAH Polycyclic Aromatic Hydrocarbon m bcl Metre Below Cover Level PCB Poly-Chlorinated Biphenyl mAOD Metres Above Ordnance Datum (sea level) PID Photo Ionisation Detector kN/m2 Kilo Newtons per metre squared QA Quality Assurance µm Micro metre SGV Soil Guideline Value
Kenyons Lane, Liverpool Phase I Geo-Environmental Site Assessment December 2017
APPENDIX III DRAWINGS
Kenyons Lane, Liverpool Phase I Geo-Environmental Site Assessment December 2017
SITE
Drawing 12-128 Site Location Plan
Kenyons Lane, Liverpool Phase I Geo-Environmental Site Assessment December 2017
APPENDIX IV PHOTOGRAPHS
Kenyons Lane, Liverpool Phase I Geo-Environmental Site Assessment December 2017
PLATE 1 – BUILDINGS AT THE DAIRY IN SOUTH SECTOR
PLATE 2 – AGRICULTURAL BUILDINGS IN THE NORTH SECTOR
Kenyons Lane, Liverpool Phase I Geo-Environmental Site Assessment December 2017
PLATE 3 – ABOVE GROUND FUEL STORAGE TANK
PLATE 4 – WASTE MATERIAL
Kenyons Lane, Liverpool Phase I Geo-Environmental Site Assessment December 2017
PLATE 5 – AGRICULTURAL LAND
PLATE 6 – GREENHOUSES
Kenyons Lane, Liverpool Phase I Geo-Environmental Site Assessment December 2017
PLATE 7 – DAIRY
PLATE 8 – PORTAL FRAME SHED
Kenyons Lane, Liverpool Phase I Geo-Environmental Site Assessment December 2017
APPENDIX V HISTORICAL MAPS
Lancashire And Furness Published 1849 Source map scale - 1:10,560 The historical maps shown were reproduced from maps predominantly held at the scale adopted for England, Wales and Scotland in the 1840`s. In 1854 the 1:2,500 scale was adopted for mapping urban areas; these maps were used to update the 1:10,560 maps. The published date given therefore is often some years later than the surveyed date. Before 1938, all OS maps were based on the Cassini Projection, with independent surveys of a single county or group of counties, giving rise to significant inaccuracies in outlying areas. In the late 1940`s, a Provisional Edition was produced, which updated the 1:10,560 mapping from a number of sources. The maps appear unfinished - with all military camps and other strategic sites removed. These maps were initially overprinted with the National Grid. In 1970, the first 1:10,000 maps were produced using the Transverse Mercator Projection. The revision process continued until recently, with new editions appearing every 10 years or so for urban areas.
Map Name(s) and Date(s)
Historical Map - Slice A
Order Details Order Number: 148887669_1_1 Customer Ref: 12-128 National Grid Reference: 338160, 403760 Slice: A Site Area (Ha): 9.83 Search Buffer (m): 1000 Site Details Mortons Dairy, Kenyons Lane, Lydiate, LIVERPOOL, L31 0BP
Tel: 0844 844 9952 Fax: 0844 844 9951 Web: www.envirocheck.co.uk
A Landmark Information Group Service v50.0 05-Dec-2017 Page 2 of 12 Lancashire And Furness Published 1894 Source map scale - 1:10,560 The historical maps shown were reproduced from maps predominantly held at the scale adopted for England, Wales and Scotland in the 1840`s. In 1854 the 1:2,500 scale was adopted for mapping urban areas; these maps were used to update the 1:10,560 maps. The published date given therefore is often some years later than the surveyed date. Before 1938, all OS maps were based on the Cassini Projection, with independent surveys of a single county or group of counties, giving rise to significant inaccuracies in outlying areas. In the late 1940`s, a Provisional Edition was produced, which updated the 1:10,560 mapping from a number of sources. The maps appear unfinished - with all military camps and other strategic sites removed. These maps were initially overprinted with the National Grid. In 1970, the first 1:10,000 maps were produced using the Transverse Mercator Projection. The revision process continued until recently, with new editions appearing every 10 years or so for urban areas.
Map Name(s) and Date(s)
Historical Map - Slice A
Order Details Order Number: 148887669_1_1 Customer Ref: 12-128 National Grid Reference: 338160, 403760 Slice: A Site Area (Ha): 9.83 Search Buffer (m): 1000 Site Details Mortons Dairy, Kenyons Lane, Lydiate, LIVERPOOL, L31 0BP
Tel: 0844 844 9952 Fax: 0844 844 9951 Web: www.envirocheck.co.uk
A Landmark Information Group Service v50.0 05-Dec-2017 Page 3 of 12 Lancashire And Furness Published 1909 Source map scale - 1:10,560 The historical maps shown were reproduced from maps predominantly held at the scale adopted for England, Wales and Scotland in the 1840`s. In 1854 the 1:2,500 scale was adopted for mapping urban areas; these maps were used to update the 1:10,560 maps. The published date given therefore is often some years later than the surveyed date. Before 1938, all OS maps were based on the Cassini Projection, with independent surveys of a single county or group of counties, giving rise to significant inaccuracies in outlying areas. In the late 1940`s, a Provisional Edition was produced, which updated the 1:10,560 mapping from a number of sources. The maps appear unfinished - with all military camps and other strategic sites removed. These maps were initially overprinted with the National Grid. In 1970, the first 1:10,000 maps were produced using the Transverse Mercator Projection. The revision process continued until recently, with new editions appearing every 10 years or so for urban areas.
Map Name(s) and Date(s)
Historical Map - Slice A
Order Details Order Number: 148887669_1_1 Customer Ref: 12-128 National Grid Reference: 338160, 403760 Slice: A Site Area (Ha): 9.83 Search Buffer (m): 1000 Site Details Mortons Dairy, Kenyons Lane, Lydiate, LIVERPOOL, L31 0BP
Tel: 0844 844 9952 Fax: 0844 844 9951 Web: www.envirocheck.co.uk
A Landmark Information Group Service v50.0 05-Dec-2017 Page 4 of 12 Lancashire And Furness Published 1928 Source map scale - 1:10,560 The historical maps shown were reproduced from maps predominantly held at the scale adopted for England, Wales and Scotland in the 1840`s. In 1854 the 1:2,500 scale was adopted for mapping urban areas; these maps were used to update the 1:10,560 maps. The published date given therefore is often some years later than the surveyed date. Before 1938, all OS maps were based on the Cassini Projection, with independent surveys of a single county or group of counties, giving rise to significant inaccuracies in outlying areas. In the late 1940`s, a Provisional Edition was produced, which updated the 1:10,560 mapping from a number of sources. The maps appear unfinished - with all military camps and other strategic sites removed. These maps were initially overprinted with the National Grid. In 1970, the first 1:10,000 maps were produced using the Transverse Mercator Projection. The revision process continued until recently, with new editions appearing every 10 years or so for urban areas.
Map Name(s) and Date(s)
Historical Map - Slice A
Order Details Order Number: 148887669_1_1 Customer Ref: 12-128 National Grid Reference: 338160, 403760 Slice: A Site Area (Ha): 9.83 Search Buffer (m): 1000 Site Details Mortons Dairy, Kenyons Lane, Lydiate, LIVERPOOL, L31 0BP
Tel: 0844 844 9952 Fax: 0844 844 9951 Web: www.envirocheck.co.uk
A Landmark Information Group Service v50.0 05-Dec-2017 Page 5 of 12 Lancashire And Furness Published 1938 Source map scale - 1:10,560 The historical maps shown were reproduced from maps predominantly held at the scale adopted for England, Wales and Scotland in the 1840`s. In 1854 the 1:2,500 scale was adopted for mapping urban areas; these maps were used to update the 1:10,560 maps. The published date given therefore is often some years later than the surveyed date. Before 1938, all OS maps were based on the Cassini Projection, with independent surveys of a single county or group of counties, giving rise to significant inaccuracies in outlying areas. In the late 1940`s, a Provisional Edition was produced, which updated the 1:10,560 mapping from a number of sources. The maps appear unfinished - with all military camps and other strategic sites removed. These maps were initially overprinted with the National Grid. In 1970, the first 1:10,000 maps were produced using the Transverse Mercator Projection. The revision process continued until recently, with new editions appearing every 10 years or so for urban areas.
Map Name(s) and Date(s)
Historical Map - Slice A
Order Details Order Number: 148887669_1_1 Customer Ref: 12-128 National Grid Reference: 338160, 403760 Slice: A Site Area (Ha): 9.83 Search Buffer (m): 1000 Site Details Mortons Dairy, Kenyons Lane, Lydiate, LIVERPOOL, L31 0BP
Tel: 0844 844 9952 Fax: 0844 844 9951 Web: www.envirocheck.co.uk
A Landmark Information Group Service v50.0 05-Dec-2017 Page 6 of 12 Ordnance Survey Plan Published 1955 Source map scale - 1:10,000 The historical maps shown were reproduced from maps predominantly held at the scale adopted for England, Wales and Scotland in the 1840`s. In 1854 the 1:2,500 scale was adopted for mapping urban areas; these maps were used to update the 1:10,560 maps. The published date given therefore is often some years later than the surveyed date. Before 1938, all OS maps were based on the Cassini Projection, with independent surveys of a single county or group of counties, giving rise to significant inaccuracies in outlying areas. In the late 1940`s, a Provisional Edition was produced, which updated the 1:10,560 mapping from a number of sources. The maps appear unfinished - with all military camps and other strategic sites removed. These maps were initially overprinted with the National Grid. In 1970, the first 1:10,000 maps were produced using the Transverse Mercator Projection. The revision process continued until recently, with new editions appearing every 10 years or so for urban areas.
Map Name(s) and Date(s)
Historical Map - Slice A
Order Details Order Number: 148887669_1_1 Customer Ref: 12-128 National Grid Reference: 338160, 403760 Slice: A Site Area (Ha): 9.83 Search Buffer (m): 1000 Site Details Mortons Dairy, Kenyons Lane, Lydiate, LIVERPOOL, L31 0BP
Tel: 0844 844 9952 Fax: 0844 844 9951 Web: www.envirocheck.co.uk
A Landmark Information Group Service v50.0 05-Dec-2017 Page 7 of 12 Ordnance Survey Plan Published 1968 Source map scale - 1:10,000 The historical maps shown were reproduced from maps predominantly held at the scale adopted for England, Wales and Scotland in the 1840`s. In 1854 the 1:2,500 scale was adopted for mapping urban areas; these maps were used to update the 1:10,560 maps. The published date given therefore is often some years later than the surveyed date. Before 1938, all OS maps were based on the Cassini Projection, with independent surveys of a single county or group of counties, giving rise to significant inaccuracies in outlying areas. In the late 1940`s, a Provisional Edition was produced, which updated the 1:10,560 mapping from a number of sources. The maps appear unfinished - with all military camps and other strategic sites removed. These maps were initially overprinted with the National Grid. In 1970, the first 1:10,000 maps were produced using the Transverse Mercator Projection. The revision process continued until recently, with new editions appearing every 10 years or so for urban areas.
Map Name(s) and Date(s)
Historical Map - Slice A
Order Details Order Number: 148887669_1_1 Customer Ref: 12-128 National Grid Reference: 338160, 403760 Slice: A Site Area (Ha): 9.83 Search Buffer (m): 1000 Site Details Mortons Dairy, Kenyons Lane, Lydiate, LIVERPOOL, L31 0BP
Tel: 0844 844 9952 Fax: 0844 844 9951 Web: www.envirocheck.co.uk
A Landmark Information Group Service v50.0 05-Dec-2017 Page 8 of 12