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STG Engineering - Geotechnical Site Engineers

STG Engineering - Geotechnical Site Engineers

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STG Engineering - Geotechnical Site Engineers

Location

Area
South Hams, South Devon

Contact Info (please mention SouthHams.com!)

Main Contact:
Simon Tyrrell
Mobile Number:
Opening Hours:
Monday to Saturday 8am - 6pm

STG Engineering is a small geotechnical consultancy based in the South Hams with over 18 years’ experience. Working alongside local architects, civil engineers, structural engineers and builders we offer high quality geotechnical sitework to include:

  • Infiltration Testing for Soakaways
  • Percolation Testing for Drainage Fields
  • Slope Stability (Rock & Soil)
  • Ground Investigations
  • Waste Classification Testing
  • Compliance Testing of Engineered Fill

We offer competitive rates including a free initial site visit to discuss your needs; with a quick and efficient turnaround. Upon completion of site work, a specific report is issued ranging from basic to comprehensive dependent on your requirements.

 


Soakaway & Drainage Field Testing:

We undertake Soakaway Testing (infiltration) in accordance to BRE Digest 365 and can source all necessary plant (excavator, tractor and water bowser). Upon completion of site work we calculate the soil infiltration rate (f) and produce a Surface Water Drainage Assessment Report for your planning application. If your site is within Flood Zone 2,3 or within a Critical Drainage Area (Kingsbridge, Ivybridge and Modbury) we can also produce a relevant Flood Risk Assessment (FRA). If soakaways are not feasible (limited space, poor infiltration rate etc) we can produce a Drainage Strategy Report where we move down the surface water drainage hierarchy to either discharge to watercourse (if available) or discharge to sewer with consent from South West Water.

 

We undertake Percolation Testing for Foul Water Drainage Fields in accordance to BS6297: 2007 (and Building Regulations Approved Document H2 – Drainage and Waste Disposal 2015) for sites that are not on mains sewerage. Upon completion of site work we calculate: percolation value (Vp), subsequent floor area (At) and the lengths of perforated pipe required, and provide recommendations for the drainage field. This is detailed within a Foul Water Percolation Test Report for your planning application and we can also complete the necessary FDA1 Form.

 

In addition, we can recommend a local supplier for all your drainage equipment, in conjunction with local installers.

 

Slope Stability Analysis:

We undertake visual assessments on both rock and soil slopes including: cliffs, cuttings and embankments to identify the cause and extent of failure, whether further failure is expected and recommendations as to the remedial actions required. Recommendations may include further assessment and monitoring, in conjunction to a Ground Investigation or a detailed rock inspection using rope access engineers that we can source.

Upon completion of site work, a Slope Stability Report is issued outlining recommendations and options for remedial works. This can be passed on to specialist design engineers for approved remedial works if required.

 


Ground Investigations (Phase 1 & 2):

Phase 1 – Site walkover in conjunction with OS Maps, documents and databases to produce an interpretative desk study report outlining site settings, potential geological hazards and environmental issues including potential site contamination.

Phase 2 - Intrusive investigation tailored to your requirements to determine the engineering properties of soil and rock. We obtain necessary geotechnical parameters for foundation and/or retaining wall design and to distinguish different strata, soil strengths/densities and determine depth of bedrock. Site work involves: Trial Pits (hand-dug using insulated tools to 1.20m depth and/or machine excavated to ~4m depth), Windowless Sampler boreholes (using a small tracked rig undertaking core samples to depths of 5m, Standard Penetration Tests (SPTs) to depths of 8m and continuous Dynamic Probes (DPs) to depths of 12m) and Rotary boreholes (large tracked rig e.g Commachio 205 that is capable of core samples to depths in excess of 30m).

Samples are obtained for analysis and subsequent geotechnical testing is undertaken in a UKAS accredited laboratory whilst geo-environmental (contamination risks to human health, property and the surrounding environment e.g hydrocarbons, heavy metals and asbestos) is undertaken in a MCERTS accredited laboratory. 

Within the boreholes, standpipes can be installed for monitoring of gas, groundwater and movements. We can undertake rounds of monitoring to identify any gas (methane, carbon dioxide, oxygen, hydrogen sulphide and carbon monoxide), groundwater levels on site and obtain groundwater samples for geo-environmental testing.

Upon completion of all works an Interpretive Ground Investigation Report (GIR) is issued.

 


Waste Classification Testing:

If exporting any soil offsite (deemed waste) to a local exception site (U1) we can obtain necessary samples for Waste Classification Testing in a MCERTS accredited laboratory. Upon receipt of results, analysis is undertaken outlining status and classification. Please note, whilst the classification of waste is within our remit, how you dispose of this material is not the responsibility of STG Engineering Ltd.

 


Engineered Fill:

We can undertake a range of in-situ tests to ensure adequate compaction of engineered fill has been achieved as per the specifications within a Geotechnical Design Report (GDR) in accordance to BS 1377 and includes: Plate Load Tests (PLT’s), plate CBR’s, hand-held Dynamic Cone Penetrometers (DCP’s), Sand Replacement Density (SRD) and Shear Vanes.  

Upon completion of works a comprehensive Earthworks Validation Report is issued.

 


Site Supervision:

With CSCS, IOSH and Emergency First Aid Trained we can work on a variety of sites undertaking monitoring and supervision of site work, earthworks, ground investigations and engineered fill.

Furthermore, Personal Track Safety (PTS) and Individual Working Alone (IWA) competency allows work to be carried out on the railway sector.

Full geotechnical logging (Structural, Interval and Sampling) can be undertaken on rock cores for mining and civil industries.


Call us or send us a message via the green message button to discuss your requirements

 

Photos

STG Engineering - Geotechnical Site Engineers
STG Engineering - Geotechnical Site Engineers
STG Engineering - Geotechnical Site Engineers
STG Engineering - Geotechnical Site Engineers
STG Engineering - Geotechnical Site Engineers
STG Engineering - Geotechnical Site Engineers
STG Engineering - Geotechnical Site Engineers
STG Engineering - Geotechnical Site Engineers
STG Engineering - Geotechnical Site Engineers
STG Engineering - Geotechnical Site Engineers
STG Engineering - Geotechnical Site Engineers
STG Engineering - Geotechnical Site Engineers
STG Engineering - Geotechnical Site Engineers
STG Engineering - Geotechnical Site Engineers
STG Engineering - Geotechnical Site Engineers
STG Engineering - Geotechnical Site Engineers
STG Engineering - Geotechnical Site Engineers
STG Engineering - Geotechnical Site Engineers
STG Engineering - Geotechnical Site Engineers
STG Engineering - Geotechnical Site Engineers
STG Engineering - Geotechnical Site Engineers

User reviews

16 reviews
 
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5.0
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5.0(16)
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5.0(16)
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5.0(16)
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5.0(16)
Come again / Recommend
 
5.0(16)
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Comments
Drainage consultancy work
Overall rating
 
5.0
Communication
 
5.0
Quality / Service
 
5.0
Professionalism
 
5.0
Value for money
 
5.0
Come again / Recommend
 
5.0
Simon is simply fantastic. He was recommended to me via word of mouth in the South Hams area, and he exceeded my expectations.
I 100% recommend capitalising on his expertise, in this instance for a surface water drainage strategy report and a flood risk assessment, but I'm sure his talents go much further than just this!
Thank you Simon @ STG Engineering :)
IB
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100% recommended
Overall rating
 
5.0
Communication
 
5.0
Quality / Service
 
5.0
Professionalism
 
5.0
Value for money
 
5.0
Come again / Recommend
 
5.0
I found STC by chance after spending much time and money on a local groundworks company who were a complete sham. Simon immediately answered my query from the website which took me back,that just doesn't happen nowadays!.He was true to his word and took more than a years stress from me in a couple of emails putting all my fears to bed.I have been let down by builders many times in the last few years but on speaking to Simon he restored my faith in humanity going above and beyond what i needed and even sourcing materials and giving advice.Worth ever penny and old fashion personal service that you just dont get.Simon is a genuinely decent human being ,happy in his work and exceptionally knowledgeable.Dont make the mistake of contracting a cowboy just in it for the money contact STC and do yourself a favour.
GM
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Surface Water Drainage Assessment
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5.0
Communication
 
5.0
Quality / Service
 
5.0
Professionalism
 
5.0
Value for money
 
5.0
Come again / Recommend
 
5.0
A surface water drainage assessment was required for our planning application. Simon Tyrrell's service was first rate. On time and on budget.
GH
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Surface water assessment
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5.0
Communication
 
5.0
Quality / Service
 
5.0
Professionalism
 
5.0
Value for money
 
5.0
Come again / Recommend
 
5.0
For planning we required a surface water assessment. We contacted Simon from STG Engineering who was very professional and knowledgeable. He carried out the testing requirements and we received a detailed report.
Would highly recommend Simon and would not hesitate to employ him again.
Thanks
I&
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Devonia Barn
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5.0
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5.0
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5.0
Excellent job by a very knowledgeable professional, would highly recommend.
DL
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