The most current documentation can be found on Kevin Adkins blog page. It's not the 2014 comments any longer (2015 at this point!), though this page still bears that name. One should remove the following URL and add a more current one if this documentation is updated.
Current L2 Documentation as of Run15

 This documentation inludes a few things:

- A detailed guide to L2 monitoring
- A detailed guide to monitoring the L2 pedestals
- A detailed guide to updating the L2 tower masking file
- A few comments about the L2 algos and how they work together

This document will probably be in other places too, but it should be safe here.