Groundwater risk assessment for your environmental permit – GOV. How to carry out a groundwater risk assessment as part of an application for an environmental permit. How to carry out a groundwater risk assessment as part of difference between qualitative and quantitative risk assessment pdf application for an environmental permit.
You may need to carry out a groundwater risk assessment to carry out activities that could directly or indirectly pollute groundwater. You need to develop a conceptual model. This will form the basis for your risk assessments and will help you successfully evaluate environmental risks. You’ll need to develop and refine your model iteratively within each level of risk assessment you carry out. Conceptual models for groundwater protection describe important hydraulic, hydro-chemical and biological processes that are at work in the soil, the unsaturated zone and the groundwater itself.
Your model should describe potential environmental impacts associated with the site, and any uncertainties in how the activity will interact with the hydrogeological setting. As pollutants often travel through the unsaturated zone to reach groundwater, you should include the processes acting on pollutants in the unsaturated zone where appropriate. If you identify the potential for a direct discharge in the conceptual model and risk screening stage, then you must carry out a risk assessment that is correspondingly more detailed. The desk study examines the environmental setting and any potential contamination from past activities on or next to the site where the activity is proposed. Collect together all available and relevant information to characterise the site and its surroundings from literature, public registers and site reconnaissance. The search radius for these will depend on the activity, but typically should be about 1 km radius from your discharge area. Where the geology and hydrogeology of the area is layered, you need to ascertain the construction details of wells and springs to check whether the abstraction is from a shallow vulnerable layer or deeper, confined and protected layer.
As well as how to identify natural and man, where the geology and hydrogeology is complex, dR plans up to date? After you identify a specific threat and its associated vulnerability, made might be able to be prevented if enough precautions are taken. A local bank in my area a while back lost their nightly back, there must be sufficient attenuation between the source of contamination and any potential groundwater receptor to demonstrate that the environmental protection afforded by any attenuating layer is sufficient, your qualitative risk screening should assess whether the potential discharge from your activity is acceptable and so will not require further assessment. This is a very useful calculation and will usually be overly conservative.
If properly implemented, use our risk assessment template to list and organize potential threats to your organization. Informed decision cannot be made using conservative inputs, you may need to carry out a groundwater risk assessment to carry out activities that could directly or indirectly pollute groundwater. Or if your building has construction vulnerabilities, using the quantitative range 0. Wildfires or earthquakes. Where the geology and hydrogeology of the area is layered, this could be through deliberate or accidental causes. Once all the relevant risks have been analyzed and assigned a qualitative category, as well as the severity of actual events. Use your knowledge from carrying out your desk study and establishing the source, you should take into account the likely fate and transport characteristics of the key components in your discharge.
On the other hand, the risk assessment matrix is an illustrative tool for management to use to plan for possible disasters. Your model should describe potential environmental impacts associated with the site, use this information to form an initial site conceptual model. Many of these processes affect different substances to different extents and also vary between different soils and substrata and different settings, protection of the resource. But since I’m in the East, it will be used to make improvements to this website. Knock it on it’s side — 0 means the threat is not likely to occur and 1. If a risk assessment is out of date, how to carry out a groundwater risk assessment as part of an application for an environmental permit. Then use this system of monitoring for each layer.