In Washington State, you have to successfully complete an approved asbestos worker training course (32 Hours)

Achieve a score of at least seventy percent on a one hundred question multiple choice closed book examination approved by the department but administered by the training course sponsor. If an individual does not pass the examination, then another examination (meeting the above criteria) may be given after a sufficient period of study. The new examination must not duplicate more than fifty percent of the questions used on prior examinations.

You have 60 days after you complete the class to submit your application and pay a $50.00 non refundable fee.