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Silt Pollution Risk Test

Settlement Tests

Settlement testing is an important technique used to identify the risk of a site to silt pollution and to determine the best course of treatment. Each test is site-specific and evaluates how quickly suspended solids separate from water.

Flocculated Jars

Settlement Testing helps define a site’s silt pollution risk profile and informs the control measures required during temporary works.

Where appropriate, testing also includes Clearflow Gel Flocculant™ validation so that secondary treatment options can be considered with confidence.

We carry out Settlement Tests from our laboratory to help you plan ahead, reduce uncertainty and support regulatory engagement. We provide a report and a telephone consultation to discuss the findings.

These tests and reports are recommended at any stage of project to help define a successful intervention strategy. We recommend this test is carried out on all sites.

Settlement Tests are commonly used for:

  • early risk assessment preparation during pre-construction planning and greenfield feasibility studies
  • selecting proportionate silt control measures for active works based on test findings
  • evaluating Clearflow Gel Flocculant™ options before site deployment
  • supporting method statements, permits and discharge consent arrangements
  • troubleshooting where water clarity issues are already present
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Key Benefits

Our Settlement Tests bring clarity and certainty to your project:

Evidence-led decision making

Use accurate data to guide design and procurement to prevent water quality risks

Better compliance

Settlement Testing supports permits and regulatory standards

Practical outputs

We provide a concise report and consultation covering site-specific recommendations as part of our service

Flexible sampling

We will provide clear instructions on how to provide us with water and soil samples. We take samples from any site including pre-construction and live sites.

Better cost management

Working with the findings from a Settlement Test gets to the crux of water treatment requirements quicker and allows for a planned, cost-effective approach.

Rapid response

We offer a quick turnaround on our testing, reporting and consultation – a maximum of 10 working days from receiving the water or soil samples.

How to proceed with a Settlement Test:

In order to carry out Settlement Tests for a site we require samples and a completed Chain of Custody form (see our resources & videos tab). Please contact us for full specification of the types of samples we require, and other useful information about placing your order.

A Settlement Test must be carried out ahead of placing an order for Clearflow Gel Flocculant™ to assess a site’s soil structure and chemistry and help us advise you of the most suitable type of flocculant to receive optimal results.

Resources

Complete these forms and send us your sample(s):

Videos

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Frequently asked questions

Got a question about any of our products or services? Check out our FAQs, or give us a call:

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“Thanks to Frog’s technical expertise and insight, we have found new ways to tackle these common issues and improve our site water management practices – from company-wide awareness and training to monitoring and prevention. As a consequence, we have made significant cost savings and lowered our carbon emissions.” 

Paul Thomas, Head of Environment
Winvic Construction

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“The results (of the bubble curtain) were quite dramatic – in fact, startling… we have a workable solution that we’ve proved has a dramatic impact on noise propagation.” 

David McLaren, Site Manager – Marine & Civils
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It’s good to see Frog getting involved with GT at the earliest stages of the project to help with planning out water management in advance of needing it.

Galliford Try

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I really enjoyed learning how to identify which measures are best suited to the site conditions.

TACP (UK) Ltd

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“Frog Environmental were knowledgeable, helping to establish a workable, cost-effective and low maintenance solution for site approved by the regulator. They really understood the water management issues we had on site and worked with us to develop a solution which works, as well as engaging with our operatives to ensure that they could effectively manage the system.

We are delighted to have found a solution that prevents pollution and protects the environment, and ultimately allows us to continue with construction.”

Glenn Entwistle, Senior Environmental Advisor
Advance JV

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The surface water system drainage feature utilised innovative solutions from Frog Environmental.

A rain-ready strategy was implemented, which enabled the development of a robust management system capable of effectively managing fluctuations in weather conditions year-round.

This provided a timely, sustainable and cost saving solution for our client.

Anthony Jordan
RSK Geosciences

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“The positive impact of your business on the wider industry is incredible. You have upskilled so many of us and definitely improved water quality across UK construction sites!”

Bernadette Anderson, Environmental Manager
VolkerLaser

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Frog’s commitment to develop innovative, market-leading strategies to help their construction clients take responsibility for their sites has and is inspiring an industry-wide change in management culture to improve environmental practices. Of note is their “Rain Ready” water treatment system which is setting new benchmarks in environmental excellence.

Brad Griko, VP Operations
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“The systems were very effective, and we can see how they could be used on other projects. Being able to talk through the scenario with Frog Environmental was really helpful… We were so pleased to be able to proceed with this essential works with no disruption to either wildlife or our workplan, it saved us time, money, and provided peace of mind that we had taken effective steps to protect the environment.”

Huw Williams, Site Agent
Morgan Sindall Infrastructure – Water & Highways

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They (Frog Environmental) were efficient in providing advice and the most appropriate product for our project. The team responded promptly to ensure the Bubble Curtain was delivered to the site on schedule.

It has worked well and has been great on site. We are demobilising this week, and the bubble curtain is already in store at our next site for reuse!

Hayley Jackson, Site Agent
Coffey Group

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The Kex Gill road realignment scheme is a challenging project with multiple environmental risks including management of silt and water quality of the surrounding environment given the locality of designated sites.

Frog Environmental are providing us with extensive technical support, including the design, supply and install of their silt control products on site to ensure the project minimises risks to the watercourses in the project vicinity and prevents impact on highly sensitive aquatic species.

It’s great to be working with them and we’re delighted with the success of the whole project.

Georgina King, Associate Director
RSK Environment

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