Prerelease mitigation measures

Mitigation techniques are divided into two categories prerelease and postrelease mitigation measures. Prerelease mitigation measures take effect... 

Flare stacks that safely bum organic material released into vent headers are an example of a prerelease mitigation measure. The flare destroys the hazardous organic material before it reaches the environment. A dike around a storage tank is an example of a postrelease mitigation measure. The dike contains the release in a small area, reducing the total evaporation rate from the spill and so reducing the impact of the release. 

If risk reduction is required, prerelease mitigation measures are typically used first. If the risk is still not acceptable, postrelease mitigation is then used. Postrelease mitigation is less cost-effective than prerelease mitigation. 

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