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Satisfying Planning Conditions

Look What We Found....

Environmental planning conditions are commonplace in brownfield development and much of our work is involved in the negotiation of discharge of such conditions. We have developed excellent relationships with Planning Authorities and Environment Agency/Scottish Environment Protection Agency over the years and enjoy a good success rate in planning condition discharge.

Earlier in the year Subadra were commissioned to assist in a significant phased retail development on the south coast of England. The site is within Zone I of a Source Protection Zone, overlies Chalk and is 40m from surface water. In other words it is in an extremely environmentally sensitive location. Initial investigation works had identified diesel and waste oil in shallow groundwater under the site.

This is where owning our own drill rigs and our own laboratory comes into play! We were able to delineate and characterise the contamination, and install sentinel wells within a month and without delaying the build programme. As a result of our detailed assessment, we’ve negotiated a long-term remedial solution for the site, installed the required groundworks and construction works have commenced.

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Successful Technical Presentation….

Contaminant Contour Plot

Otherwise known as ‘understand your audience’.

We have recently completed a highly complex site investigation and detailed risk assessment of a public amenity site on behalf of a Local Authority. Our technical report, however, needed to be understood by a wide range of stakeholders, including regulators, consultants, site users and the general public. We used a range of graphical presentation methods in our report, cut the industry acronyms to a minimum and offered a report written in ‘plain English’. The result? Clear advice and a happy client, who described our report as ‘a model of site investigation & risk assessment communication’.

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When Wetstock Monitoring Doesn’t Work

It has become increasingly common in recent years for filling station operators to rely on remote wetstock monitoring to detect possible leaks in their system. Tank and pump gauges are monitored remotely with sophisticated trend analysis used to detect abnormal behaviour. These systems can be very good, but they aren’t infallible.

Last year Subadra were retained to clean up contamination resulting from a leak at a filling station. Our treatment was completed successfully over the winter months and by mid-summer we had started post-remedial monitoring, with groundwater samples taken at monthly intervals from monitoring wells we had installed at the site.

Our consultants noticed some anomalous results appearing and, in best CSI fashion, our laboratory carried out a programme of forensic analysis. This was able to determine the ‘age’ of the contamination we were finding, telling us how long the leaked fuel had been in the ground. This confirmed that the wells were being contaminated from a new source.

The site’s real-time remote wetstock monitoring was checked but didn’t show a leak at the site. However, on our advice, the site operator had the tanks and lines pressure tested and this identified a steady slow leak from one of the pumps. Repairs were carried out limiting the volume of fuel lost into the ground.

The moral of the tale? Well, remote wetstiock monitoring is very good and we would certainly recommend it. But it’s not infallible. In those cases, forensic analysis can help identify leaks that wetstock monitoing misses.

If you’d like to know more about our forensic analysis service or any of the other services offered by our UKAS/MCerts accredited laboratory please contact Kate Clark.

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Food Wholesaler/Distributor Retains Subadra

Subadra have been retained by a major food wholesaler/distributor to carry out a comprehensive audit/investigation of the fuel storage and supply infrastructure at a multi-site portfolio across the UK. Key to winning the contract was our ability to complete the project within a tight timescale. This is only possible because of our unique approach whereby every aspect of the project will be carried out using in house resources, from borehole drilling through to laboratory analysis; and, of course, our competitive rates!

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Tight Deadlines?

Tight Acquisition Deadline?

Sometimes you need a detailed ground investigation with large numbers of boreholes, utilising a variety of different investigation tools (drill rigs, plate bearing tests, pile probing etc), with data collected and assimilated over a period of days or even weeks, that delivers a detailed description of site geology and provides a well defined contaminant delineation.We can do this for you.

However, sometimes you need a basic no frills contamination survey that is both cost effective and done on a very fast turnaround.Here at Subadra we own and operate our own survey team, drill rigs, chemical analysis laboratory in addition to our team of highly skilled geotechnical and environmental consultants that are responsible for collating, assessing and the reporting the data we produce. This means we can carry out high quality, cost effective Phase One and Two contamination surveys within days.This service proves invaluable for may of out clients who are always on the lookout to purchase new sites to add to their portfolio and don’t want to lose out on a lucrative deal or, perhaps worse, get caught out by discovering contamination issues after the site has been purchased.

We recently carried out a survey at a filling station site in Hampshire that was instructed on a Friday at 4pm and we had carried out a below ground utilities survey, borehole investigation, groundwater monitoring and sampling, all analysis and data reported to the client by the following Thursday. Now how does that compare with the service you currently receive from your consultant?
Contract value: £4.5k
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SPOSH? POSH? What’s in an Acronym?

Drilling with Terrier

SPOSH? POSH? (insert baffling acronym of your choice here). Sometimes our industry really makes a meal of what should be a simple process. How do you determine if a site is contaminated or not? We think the answer is simple: do a decent site investigation!

We have recently been working at site that proved to be a classic example of a ‘cheap’ site investigation saving nothing. The original investigation was carried out by others four years ago. After many other consultants were hired but failed to provide any clear answers (or any answers at all) we were commissioned to break the impasse.

We constructed 180 boreholes on a 5m grid using one of our dynamic sampling rigs. Boreholes and sampling locations were surveyed using GPS allowing us to develop a 3D contaminant profile of the site. Finally
sufficient information is now available to allow our client to make sensible decisions regarding future use and/or remedial strategy for the site. All this without resorting to any obscure and baffling acronyms.

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Subadra Awarded Multi-Site Portfolio

We have been awarded the contract to carry out pre-redevelopment site investigations at a portfolio of approximately 30 filling stations across the UK for a major fuel retailer. The contract requires both environmental and geotechnical assessment of each site. Key to our successful bid was the fact that we will be carrying out all the work using our own drilling rigs and our own UKAS/MCerts laboratory, allowing us to be confident of meeting the very demanding project deadlines. This contract confirms our position as the UK’s #1 environmental consultancy in the retail fuel sector.

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Water, Water Everywhere

Treatment System in Operation

We are currently assisting in the treatment of construction wastewater from a filling station redevelopment in Dorset. Working with the primary works contractor, we provided a system that is capable of pumping and treating high volumes of hydrocarbon-contaminated water from deep excavations.

Our in house designed, modular treatment plant was efficiently dealt with two both suspended solids and hydrocarbon contamination, ensuring all the effluent met the site’s discharge licence conditions.

We installed and tested the system at an early stage of the works allowing us to collect and analyse samples in our UKAS accredited laboratory and use this information to assist in obtaining a temporary discharge license from the local sewerage undertaker. This meant the
contractor was able to discharge effluent direct to the foul sewer.

With the high costs and project delays associated with tankering hydrocarbon-contaminated wastewater from site our fully mobile and modular dewatering systems are a simple and cost effective way of dealing with dewatering effluent.

Project value: less than £10k

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Motorway Service Area Investigation

Earlier this month we were awarded a contract to investigate the forecourt area at a motorway service area in southern England, for a major oil company, as part of a leasehold transition.
With data from over thirty boreholes and monitoring wells this was a relatively detailed investigation for forecourt investigation. However, our client understood that carrying our a comprehensive combined environmental and geotechnical ground investigation at an early stage invariable pays saves money in the long run.
We used our GeoProbe direct-push drilling system to construct boreholes, targeting key areas such as the below-ground fuel tanks, fuel lines and forecourt interceptor. We then analysed the soil and groundwater samples for our hydrocarbon suite at our own UKAS
accredited laboratory.
Our investigation report has provided our client with a detailed baseline study confirming ground quality and highlighting any areas of contamination at the time they took over mangement of the site.
Contract value £25k

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Subadra Awarded Multi-site Remediation Portfolio

We have been awarded a major remediation portfolio by one of the UK’s biggest fuel retailers. The multi-site portfolio will see us working at a sites across the UK using a wide variety of both in situ and ex situ remediation techniques. We understand that a key reason for us winning this work was our ability to provide cost-effective turnkey solutions, integrating site investigation, laboratory testing, fate-transport modelling and remediation design and implimentation using solely in house resources.