Environmental Health
Septic Systems
On-Site Sewage Management Plan
Thurston County OSS Management Plan Update  

On-Site Sewage System Management Plan Advisory Committee

OSS Management Plan Committee - Vision Statement
“Our goal is to protect public health in Thurston County by assuring that on-site sewage systems are properly designed, permitted, built, operated, and maintained or abandoned. As we update the OSS Management Plan, we will strive to accomplish this goal by evaluating the effectiveness of current programs and study findings, complying with requirements of state regulations, and meeting the needs of the citizens of Thurston County.”
Meeting Dates, Times, Agendas and Notes
Links to agendas and notes are available by meeting date. Agendas will be available prior to the meeting date. Draft meeting notes will be available after each meeting. Final meeting notes will be posted after they are approved at the following meeting.

All meetings will be held at:
Thurston County Public Health & Social Services
412 Lilly Rd NE, Room 107 A, B and C
Olympia, WA 98506-5132

Please note that meeting agenda, notes and presentation materials are provided in pdf format unless otherwise noted.
Meeting Date Meeting Time Meeting Agenda Meeting Notes Presentations & Materials
November 7, 2013 3:00 - 5:00 p.m. Agenda Notes  
December 5, 2013 4:00 - 6:00 p.m. Agenda Notes Septic Systems 101
Onsite Sewage System Operation & Maintenance in Thurston County
January 9, 2014 3:00 - 5:00 p.m. Agenda Notes Thurston County Surface Water Quality & Sensitive Areas
February 6, 2014 3:00 - 5:00 p.m. Agenda Notes On-site Systems and Groundwater
Wellhead Protection - McAllister and Shana Park
March 13, 2014 3:00 - 5:00 p.m. Agenda Notes Why Households don't maintain septic systems/Why regulations are needed
Marine Recovery Areas and Local Management Areas
        OSS Plan Advisory Committee: Part 5 - Education
April 3, 2014 3:00 - 5:00 p.m. Agenda Notes OSS Management Plan Program Funding
    Septic Parcel to Neighborhood Relationship
    Neighborhood Septic Density Analysis
    Groundwater Risk (WHPA and Soils)
    Surface Water Risk (Proximity to Water and Soils)
    Groundwater Risk Scores
    Combined High Risk Neighborhoods
    Urban Septic Assessment Project
May 1, 2014 3:00 - 5:00 p.m. Meeting Canceled  
June 12, 2014 2:30 - 4:30 p.m. Agenda Notes OSS Management Plan Program Funding
July 10, 2014 3:00 - 5:00 p.m. Agenda Draft Notes  

Reference Materials:

Article IV - Rules and Regulations of the Thurston County Board of Health Governing Treatment and Dispersal of Sewage [pdf]

Rules and Regulations of the State Board of Health - On-site Sewage Systems
Chapter 246-272A WAC (Effective July 1, 2007) [pdf]

On-site Sewage Disposal Systems - Marine Recovery Areas
Chapter 70.118A RCW

OSS Management Plan Guidance for the Twelve Puget Sound Counties (DoH - June 2006) [pdf]

Marine Recovery Area Guidance:
Supplemental to the On-Site Sewage System Management Plan Guidance (DoH - October 2006) [pdf]

Popular Pages & Links
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This page last updated: 04/29/17