First and always, make sure to confer with your department administrator regarding internal deadlines and processes that assist you in meeting campus requirements.
You may use whatever evaluation tool your department may have developed if it suits your purposes.
What is required by UCD's Postdoctoral Policy is to file annually a "public record" of a performance rating with the Postdoctoral Office. It also has a section for updating the postdoc's annual salary.
This is the form: 2013 POSTDOC Annual Performance Rating Sheet - Copy.doc
This is the process: Evaluation process at UC Denver
Also useful might be these items:
NPA Core-Competencies.pdf NPA Competency-Checklist.pdf