Category Archives: Contaminated Land

Desktop Study – Wotton-under-Edge

Desktop Study – Wotton-under-Edge

Southwest Environmental Limited have been commissioned to write a Desktop Study for a Site in Wotton-under-Edge.

Wotton-under-Edge is a market town within the Stroud district of Gloucestershire, England. Located near the southern end of the Cotswolds, the Cotswold Way long-distance footpath passes through the town. Standing on the B4058 Wotton is about 5 miles from the M5 motorway.

The proposed development is an extension to a property, and is adjacent to some in-filled land. This has flagged the requirement for a Site Contamination Assessment, the first stage of which is a Desktop Study. We aim to deliver the report on a 5 Working Days turnaround.

We are happy to discuss you site free of charge over the phone, so please give us a call. We try to be as quick as possible, and if you require a report quickly please say and we will do our best to get it to you for your required deadline. 

Contaminated Land Land Advice

Desktop Study – Slough

Desktop Study – Slough

Acting on instruction from a client in Ealing Southwest Environmental Limited have prepared a desktop study fro site in Slough.

The desktop study has been made of the site and this revealed that historically the site was of primarily back garden use. But more recently had been used for other purposes.

As is normally the case SWEL order a comprehensive data set, so as to make a review of the site.

It was established that a Phase 2 Investigation is required, owing to current on site use, which is mixed between storage and vehicle repairs etc. 

The report was turned around in 5 days.

Site Investigation & Phase 2 Assessment – Islington, London. N19

Site Investigation & Phase 2 Assessment – Islington, London. N19

Acting on instructions from a corporate client Southwest Environmental Limited have carried out an Environmental Site Investigation in connection with a property acquisition / purchase. 
SWEL managed to deliver a reduced scope report, sufficient for our client’s needs within a 3 week period, despite having trouble on site with buried services. 
The scope included the collection of 20 soils samples, with breaking out at each position. There were 3 deeper holes drilled, for installation of boreholes for gas and ground water monitoring. Although this was not carried out owing to time frame. 
Statistical Analysis of Results 
The site was operational at the time of the investigation, with high level of vehicular and pedestrian traffic,  despite this SWEL managed to complete site works within 2 days.
Soil testing was conducted on a rapid turnaround, and results were published as part of a contamination assessment (Phase 2). The site was found to have elevated levels Benzo-a-Pyrene, are carcinogen and as such will require remediation. 

Site Investigation Bristol

Site Investigation Bristol

Southwest Environmental Limited were commissioned to undertake a reduced scope geo-environment assessment at a site in Bristol. The investigation was retrospective in that construction work had already started.

Bristol City Council  are one of the few council nationally who will accept a reduced scope investigation for geo environmental risk assessment. Ordinarily it is required to take a high frequency of samples even of smaller sites, often including ground gas investigations including deep boreholes which can prove very costly. The cost of such investigations when considering build costs for smaller projects can be approaching 10% of project value, which is some cases in inhibitive.

Below is a panoramic photograph of the site at the time of the investigation. The bedrock has been exposed to some depth by excavations for the foundations. You can clearly see the angle of the bedding and the more coal rich bed to the left of the photograph.

Photograph of Outcrop (or Incrop!)

Just 2 samples were requested by Bristol Site Council. This is a very low number. The samples retrieved showed no exceedances of established “safe” levels. Although Total Organic Carbon Levels in one sample were above those mentioned in CIRIA guidance, likley owing to the presence of coal.

The whole of Bristol is now considered a brown field area. This may seam an overreaction, but SWEL have been surprised by contamination found on “innocent” looking sites in the past. Despite best efforts to categorise a site as low risk without soil sampling it is often the case that if SWEL are pushed to investigate, post Phase 1 Desktop Study will find high levels of some contaminants.

Contaminated Land Advice during Corporate Acquisition

Contaminated Land Advice during Corporate Acquisition

SWEL were approached by a company in Cardiff who were in the process of selling to a large multi national. The purchaser was seeking to drive down the acquisition cost using poor land quality as justification.

SWEL were called in to justify whether this was the case.

The purchasers had engaged their own consultants to establish ground quality, and it was observed that they were acting in line with appropriate guidance.

The land in question although of lowered quality was suitable for end use / continued use and as such the the price should not have been affected.

Contaminated Land Cardiff

Desktop Study – Dunsford, Exeter

Desktop Study – Dunsford, Exeter

A farmer was looking to satisfy various pre-commencement planning conditions listed on his planning approval for an agricultural dwelling in Dunsford near Exeter.

SWEL were not sure why a desktop study was requested as the site was green field . . . although it was adjacent to some existing farm buildings. Discussions with Dartmoor National Park Authority had not resulted in the condition being removed and as such the desktop study was carried out, with the obvious recommendation that conditions relating to contaminated land were discharged.

 Desktop Study Exeter

Contaminated Land Review – Exeter

Acting on instructions from a development company SWEL are to review data relating to the restoration of development site which has seen considerbale quantities of materials imported for use as fill.

Records of imported materials have been well kept and cross referenced with laboratory analysis.

Using our standard generic quantitative assessment methods SWEL are producing a report to assess whether the site is fit for intended use, based on the provided data.

Contaminated Land Consultants Exeter

Contaminated Land Site Investigation – Epsom and Ewell

Southwest Environmental have recent been commissioned to undertake a contaminated land  site investigation within the London borough of Epsom and Ewell. The site investigation was commissioned on Wednesday the 30th April, and work began on the 6th of May. Making for a very prompt start.

I addition to the soil sampling of a car park area, vapour monitoring was also undertaken in the existing building which is ear marked for conversion under the new permitted development rights.

Another riveting photo!

The samples are currently with the labs on a very quick 3 day turnaround meaning the draft (soils only) report will be issued just two weeks after commissioning.

Phase 1 Desktop Study – Plymouth

Acting on instruction from a developer in Plymouth, Southwest Environmental produced a phase 1 desktop study report for a planning application.

The site was on the city outskirts and had enjoyed an agricultural history. It was not foreseen that the land could be unduly contaminated and so its was recomedned that the site contamination assessment be arrested at this first phase.

An agricultural past with no buildings on site will nearly always mean low risk of harm resulting from site occupiers, although of course each site has to be assessed on an individual basis.

 Desktop Study Plymouth

Desktop Study – London

Desktop Study – London

Acting on instruction from a devloper in London Southwest Environmenta under took a phase 1 preliminary risk assessment for site in Southwest London.

The site comprised of two terraced houses had been repourposed as a furniture shop, the plan was to demolish these and build a modern enregy effecient multi unit residential development.

Historic maps showed that their had been little change in the building outlin, and more historc trade entries for the site did not show any environmmentallu dmaging activites having taken place on site.

The walkover survey did not identify any likly sources of contamination and so the condition was discharged.

Desktop Study London


Environmental Consultants London