When using the tomcat bundle unless you change the logging options this information does not appear in the logs at all, log configuration is done in tomcat/conf/logging.properties, see my comment below of where to find this file.
Personally, rather than use the logs, and because you want to use this as Business Data, I would add my own logging via Pool On Entry and Pool on Exit Scripts and save the data to an external database table. The you can interrogate it at will and not effect the online service.
As for Status, that’s a tough one, especially when you have a well written process. A failure can be considered a successful execution if the error is handled correctly. This is an even stronger reason to not use the logs for this type of activity but your own logging.
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