Pollution monitoring strategies in incident investigation

Routine All Check values, mean, range, etc. Is there compliance with OEL and if so what is confidence  

Higher values can be used if standard is based on nuisance or odour and there are no known effects of the maximum exposure concentration measured. 

The aims of sampling are to establish whether contaminants are present, their distribution and concentrations. Commonly-used sampling regimes include square grid, stratified random or simple random techniques. Evenly-spaced sampling points may be appropriate if the contamination is visible otherwise judgement is required based on whether the land slopes or is flat. Samples are also taken near to the point of release. 

Information about the accident, e.g. date, time, magnitude and nature of release. 

Preliminary All 0.1 X OEL 0.1-1.5 xOEL Some 1.5 xOEL None if exposures are as low as reasonably practical. Investigate and carry out a more detailed survey. Investigate, take remedial action and repeat survey. 

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