OK, so when someone says they’ve been skimming, it’s not usually a good thing. However, when it’s skimming fuel from a monitoring well on petrol station, that’s definitely beneficial.
We identified the fuel during a site audit, carried out in response to complaints about petrol odours in off-site (BT and Thames Water) service ducts. Contaminants often track/migrate through ducting and service trenches, leading away from the original source. In this case, our detective work was able to trace the source of the odours back to a fuel leak from the nearby filling station.
Our UKAS accreditted laboratory carried out forensic analysis of the recovered fuel in order to determine it’s age and composition, allowing us to further focus future infrastructure and ground investigation efforts on possible sources of the leak from the filling station.
Being able to seemlessly integrate both site investigation and laboratory testing in this way resulted in significant time and cost savings for our client.
If you’d like to know more about our unique approach to assesment of contaminated land, please contact James Edley.
We recently completed a desk-top study for a site with no indication of it’s former use. A thorough, detailed data review uncovered the site’s past use as a petrol filling station. Our subsequent investigations uncovered several abandoned tanks and lots of nasty contamination.
Our report was compiled on behalf of a client looking to lease the site. As a result of our work, they were able to negotiate an indemnity against historical contamination and a contribution to the costs of dealing with future development costs associated with removing the soil contamination. A bullet dodged for our client.
We were recently appointed to complete Geo-Environmental Investigations at two new school sites, to be constructed using the latest modular construction methods.
Our investigation involved 100m of linear drilling, environmental and geotechnical laboratory testing, over 50m of dynamic probing, soakaway testing, trial pits, CBR tests, Plate Bearing Tests, Topographic surveys, CCTV surveys and utility surveys. All the site works were completed within 3 days and reports issued within 2 weeks. Surely that gets an A*!
With warmer weather arriving, we received a timely request from Micasa to assist them with the design and construction of a swimming pool for a residential client. All in a day’s work for our Terrier drill rig, which is particularly suited to this work, having a small footprint and being able to pass through a standard doorway. The only problem: our site team were left imagining taking a refreshing dip in the pool, which won’t be completed for a few months yet.
The nights are drawing in and daylight is at a premium. This can limit the hours available for sitework. Or rather it could until recently. We’ve just completed a four week long refit and refurbishment of our drill rigs. This has included fitting task lighting ensuring that we can work long into the night – or even all night of the job requires it.
For more information please contact Angus Gale – 07748358304
When a client rang and said they needed boreholes in a densely overgrown area, located up a high-sided kerb behind some hedges, we knew we had just the drill rig for the job. After checking for below-ground utilities, we completed seven boreholes locations to 4m depth in a single day. Naturally, we left the site clean and tidy, with a happy client.
The site investigation industry has, traditionally, relied on light cable percussion (generally known as shell and auger) drilling. This is slow, messy and crude providing low quality geotechnical and environmental samples at best. Thankfully, these days it isn’t the only option available to you.
The majority of our general site investigation drilling is done using hollow stem rotary methods. These provide signficantly better quality data with minimal sample disturbance, even in the toughest of conditions. This week we were working at a site underlain by glacial and millstone grit cobbles, sand and terrace gravels in a sandy clay matrix. We drilled five boreholes to their target depth on 8m in one working day – something that might have taken a shell and auger crew a week – minimising the disruption to our client’s business which was able to remain open throughout.
It probably comes as no surprise that it takes a very different skillset and completely different equipment to core through rock as opposed to boring through the sand and clay soils that are more commen near the ground surface.
The correct core bit (i.e. the part of the drill string which cuts the rock) selection is the key to obtaining high quality quality core samples. Each rock type requires a specific core bit to cut it cleanly and efficiently. So, to achieve the best results, we carry a range of different core bits with us at all times. Our drilling crew recently used our T6 coring barrel to core to depths of 25m in a range of geology from conglomerates to slate and everything in between.
So, you might say that coring is not boring. Fact!