OWP will be closed from 4:00 pm on Friday, December 20, 2024, until 8:00 am on Thursday, January 2, 2025, for Winter Break.
(All times are PST.)
| If exams are submitted: | Course certificates will be mailed: |
|---|---|
| By December 13th | By December 20th |
| After December 20th | Early January |
Please note: Postmark dates will not be honored.
A B C D E F G H I J K L M N O P Q R S T U V W Y Z
Removing grease, grit, roots, and other debris from a pipe run using hydraulic or mechanical cleaning methods. Also see hydraulic cleaning and mechanical cleaning.
