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Llwyneinion Acid Tar Lagoon - Tar Characterisation Works
Descriptions
Llwyneinion Acid Tar Lagoon is a former clay pit and brick works situated in the village of Rhosllannerchrugog near Wrexham in North Wales. The lagoon comprises approximately 94,000 tonnes of acid tar to a maximum depth of approximately 10 metres and occupying an area of 1.3 hectares. Water to a depth of 0.5 - 1.0 metres generally covers the acid tar. In addition 365 individual drums and drum clusters have been identified in the lagoon. The individual drums appear to be present at approximately 2.0 metres below surface level whilst the drum clusters may extend to the base of the lagoon. There is also approximately 7,500 tonnes of Fullers Earth to the immediate north west of the lagoon.Some investigations involving the removal of acid tar have been carried out over the years but due to access difficulties samples have only ever been taken at approximately 1-2m depth near to the edge of the lagoon. More recently the site has been investigated by Environment Agency Wales as a potential 'Special Site' as described in the Contaminated Land (Wales) Regulations 2006. However at present it is considered that the site does not meet the legal definition of contaminated land.Wrexham County Borough Council, as owners of the site, propose a detailed investigation of the acid tar and Fullers Earth, which will be split into four stages as follows:Stage 1: Detailed design of the works, giving consideration to site topography and access difficulties, ecological issues and health and safety of both site operatives and nearby residents; to be undertaken in conjunction with Wrexham County Borough Council.Stage 2: Intrusive investigation involving removal of acid tar samples from various locations within the lagoon and removal of Fullers Earth samples. Sampling shall extend as far as is reasonably practicable through full depth of material. Any site clearance and/or accommodation works necessary ahead of investigation works are included in this stage. Stage 3: Laboratory analysis and testing of material samples to enable a thorough review of suitable remediation techniques to be assessed.Stage 4: Production of a detailed remediation options appraisal.Additional Information:(a) Mineshafts: Nine mineshafts are recorded in the vicinity of the site of which three are situated below the lagoon. The condition of these shafts before disposal of the acid tar began is unknown and there are no records to suggest that they have been capped.(b) Ecology: The area around the lagoon is dominated by woodland. An ecological appraisal has revealed evidence of badgers, whilst the area contains habitat that could potentially support bats, Great Crested Newt, reptiles and breeding birds.
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Tender Regions
CPV Codes
71310000 - Consultative engineering and construction services
71900000 - Laboratory services
45100000 - Site preparation work
71621000 - Technical analysis or consultancy services
90713000 - Environmental issues consultancy services
71313000 - Environmental engineering consultancy services
71510000 - Site-investigation services
45111200 - Site preparation and clearance work
45120000 - Test drilling and boring work
Keywords
site preparation work
land clearing
excavation
site grading
demolition prep
earthworks
groundwork services
foundation prep
site leveling
preparatory works
site clearance
vegetation removal
land preparation
topsoil stripping
site cleanup
ground clearing
demolition clearance
surface preparation
vegetation clearing
site readiness
test drilling and boring work
geotechnical drilling
subsurface testing
core drilling
exploratory drilling
borehole drilling
site investigation drilling
exploratory boring
ground test drilling
environmental drilling
engineering consultancy
construction advisory
technical project planning
civil construction consulting
infrastructure advisory
engineering strategy services
build feasibility consulting
structural planning advisory
construction engineering guidance
project consultancy
environmental impact consulting
ecological engineering advisory
sustainability engineering
waste management consultancy
water treatment engineering
pollution control consulting
environmental systems design
ecological risk assessment
green infrastructure consulting
environmental planning engineering
geotechnical analysis
soil mechanics testing
groundwater condition evaluation
bedrock profiling
foundation feasibility testing
environmental borelogging
contaminant level surveys
stratigraphic sampling
construction soil risk evaluation
laboratory soil classification
groundwater table analysis
geochemical analysis
preliminary site diagnostics
terrain behavior study
stability testing
technical consultancy
engineering evaluation
feasibility diagnostics
performance optimization
system review
design auditing
process modelling
procedural enhancement
risk assessment advisory
technical feasibility study
chemical testing lab
microbiological analysis
materials characterization
soil testing lab
calibration laboratory services
sample preparation
test method validation
environmental lab testing
quality assurance lab
environmental consultancy
sustainability advice
ecological expert services
environmental impact advisory
green business consultancy
environmental risk consultancy
regulatory compliance services
eco-strategy consultancy
environmental policy support
nature preservation consultancy
Tender Lot Details
2 Tender Lots
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Possible Competitors
1 Possible Competitors
