WashingtonSharedParenting has recently added the Washington State Division of Child Support Policy Manual to the site for easy access to Non-Custodial Parents. The manuals are a great way to understand the actions to be taken by DCS, and helps NCP's understand the limitations state employees should be operating under.
They are a great tool. Once great example is their public disclosure rules. Every NCP should contact DCS on a regular basis to get a copy of their Case Comments so they understand the status of their case, as many times Staff do things that NCP's are not aware of, and in some instances they either excede their authority as outlined in the policy manual, or ignore them.
Requesting copies of your case notes is just a good practice, and keeps you informed.