After step  3, risk and system assessment, you have documented a summary of the results of your assessment, e.g. in columns 1-6 of the table below (marked red).

Using your risk and system assessment, in step 4 of this decision support tool you now have defined the key control measures which you intend to maintain, upgrade or implement. A summary of these should also be documented, and it is useful to do this together with the summary your risk and system assessment in order to demonstrate the link between both elements. 

Column 7 (marked blue) is proposed as format for this documentation (use the worksheet provided for your own documentation).

While a summary of both may be useful in the format of a table like the one suggested below, more extensive documentation may be adequate and should be developed as needed. In particular, it is useful to describe in more detail the rationale for your assessments and your definition of control measures.

The next step now is to develop management plans for your key control measures. In these, you document their operational monitoring, critical limits and corrective action to be taken when limits are exceeded, preferably together with the reasons for the choice of each control measure.

In case these do not always work sufficiently effectively and cyanobacterial levels exceed those safe for recreational use, or cyanotoxins might occur in treated drinking-water, you should further develop an early warning and contingency plan.

Summary documentation of step 3 – assessing risk and system performance						Summary documentation of step 4 – defining control measures
Cyanotoxin hazard	Risk and reasons for assessment	Uncertainty of assessment	Existing control measures	Remaining risk and reasons for assessment	Uncertainty of assessment	Next steps: new or upgraded control measures, filling information gaps
						· … · … · … · ·

è Back to START

è On to management plans