On-Site Professionals

The On-Site Sewage Disposal Installer written exam, O&M Technician exam, and O&M Specialist exam are now offered by the  Washington On-Site Sewage Association (WOSSA). Exams cost $175 each.  Go to www.wossa.org or call John Thomas at (253) 297-2837 for information or to schedule an exam.

Onsite Insight Newsletters

2012 - 1st Quarter
2011 - 3rd Quarter
2011 - 2nd Quarter
2011 - 1st Quarter
2010 - 3rd Quarter