Doctor: Greywater and Risk Assessment Essays

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Words: 927
Pages: 4

What’s the difference between gray water reuse and gray water disposal?
Do we need permission to reuse grey water bucketing as well as installing grey water recycling system?
If there are hazards associated with the grey water then why it is allowed to reuse?
Can I use grey water for a pond, creek, or waterfall?
Can grey water be used for drip irrigation? What soaps and products can I use with my grey water system?
Why the grey water bucketing does not require permission while the grey water system installation require permission?
Why it is not recommended to use grey water where there are children and immune-compromised people? How grey water can affect them?
How safe is the grey water bucketing to vegetables plant?
Can I store grey water for shorter period of time?
Can grey water bucketing Splashing be harmful?
Is there any variation in seasonal effects on the grey water reuse?
Are the benefits of grey water reuse more than health hazards? Is there any scientific research or recommendation for its reuse?
Why the kitchen grey water reuse is recommended to avoid?
How grey water can affect our pets?
What is the limit of grey water bucketing reuse per day?
Can we use grey water for flushing toilets?
If I am not reusing grey water but my neighbour is using in lawns, how that grey water can affect me?
Can grey water contaminate my swimming pool?
Can I wash my car with grey water?
Is it safe to drink treated grey water?
Can mosquito breeding be associated with grey water?
Can Grey water enter any stormwater drainage system? Is it safe?
How Can I safely control the composition of grey water?

Risk assessment Case studies
What is the value of identifying the assumptions made? Is it possible to quantify uncertainty? Is there value in trying to evaluate the uncertainty in risk assessment? Can the uncertainties be "added up"?
Assumptions are the unproven connections between levels in a design hierarchy, theory of change, While, Uncertainty in health risks assessment is the lack of knowledge about the correct value such as a specific exposure measure or estimate.
The human health risk assessments should be conducted with the best available scientific data, and that uncertainties and known potential biases should be identified in the assessment. A key element to gaining acceptance of the use of risk assessment is the continued improvement in the sciences which are the foundation of health risk assessment and the routine disclosure of uncertainty and known potential bias.
The sensitivity analysis should always be considered to test the robustness of the risk assessment results against variations within the key areas of uncertainty. This may involve changing key assumptions and determining if the changes in results would affect any decisions that have been made based on those results. Where sensitivity analysis or consideration of the gaps in knowledge indicates a significant level of uncertainty or poor confidence in the resulting decisions, further detailed assessment may be required.
An analysis of the uncertainty in the risk assessment is important because of the following:
Information from different sources carries different kinds of uncertainty and knowledge of these differences is important when uncertainties are combined for characterizing risk.
The risk assessment process, with risk management input, involves decisions regarding the collection of additional data (versus living with uncertainty). In the risk characterization, a discussion of the uncertainties will help to identify where additional information/data could contribute significantly to reducing uncertainties in the risk assessment.
A clear and explicit statement of the strengths and limitations of a risk assessment requires a clear and explicit statement of related uncertainties
Characterizing uncertainty in a risk