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 On-Site Sewage and Septic Tanks

How to obtain an On-Site Sewage System (OSS) Permit in Whitman County.

Houses that are more than 200 feet from a sewer system, and do not wish to connect to a sewer system, must have a permit for an On-site Sewage System. On-site Sewage Permit fees will vary depending on the evaluation of the site and the system's design.

FEES

 

Standard System

Engineered System

Replacement System

Homeowner Design/Install

Site Evaluation

$350.00

$350.00

$350.00

$350.00

Design and Permit

$475.00

$580.00

$355.00

$625.00

O&M Fee

$45.00

$45.00

$45.00

$45.00

Total

$870.00

$975.00

$750.00

$980.00

 

STEP I.  SOIL & SITE EVALUATION

  • Complete the front page of the On-site Sewage Site Evaluation Application and return it to Whitman County Public Health (WCPH) and schedule a site evaluation. The property owner/applicant is responsible for digging test holes according to L&I standards while WCPH is on site (see insert).

  • The fee for the site evaluation is: $350.00
  • Based on the results of the site evaluation and the location of the system, either a standard gravity system or an engineered pump system may be approved.

STEP I.  SOIL & SITE EVALUATION

    Design

  • If required (due to site/soil restrictions or system sizing) contract with a Washington State licensed designer or engineer, to design a site appropriate OSS system based on the site evaluation from WCPH.

  • Fill out ALL portions of the On-site Sewage Permit Application. The design portion of the permit is to be done by the designer/engineer. All sections including the material specification sheets are required before approval.

  • Pay the WCPH permit fee: Make checks payable to : Whitman County Public Health

    Obtain approval of the system design before installation.

     

    **ADDITIONAL FEES MAY APPLY FOR IMPROPERLY INSTALLED SYSTEMS OR REPEAT INSPECTIONS. Any system installed before submitting plans or securing approval, will result in DOUBLE the fees, AND non-issuance of Certificate of Occupancy until all fees are paid and permits completed. **

    Installation/Inspections

  • Contract with a WCPH licensed installer. A list of licensed installers can be obtained from WCPH.

  • When installation is complete, contact WCPH for a final inspection BEFORE covering the system.

  Record Drawings/As-Builts

  • After final inspection is approved, an as-built drawing by the licensed installer must be submitted to WCPH and the property owner. If the as-built is not returned to WCPH within one month of the final inspection a $55 collections fee will apply. A permit cannot be issued until Whitman County Public Health receives a final as-built.

STEP III.  Maintenance

  • Every three (3) years a system assessment performed by a Whitman County approved assessor and an ONSITE SEWAGE SYSTEM EVALUATION returned to Whitman County Public Health. WAC 246-272A-0270(d).

Download the Complete 2015 Onsite Sewage Permitting Packet.

 


Septic Tanks & On-Site Sewage Information

Onsite Sewage Systems Introduction

Common in rural areas without centralized sewer systems, septic systems are underground wastewater treatment structures that use a combination of nature and time-tested technology to treat wastewater from household plumbing produced by bathrooms, kitchen drains, and laundry.  

Click here for more...

OSS Homeowner Education

Did you know that 25% of all U.S. homes have septic systems? Yours may be one of them. If you're not properly maintaining your septic system, you're not only hurting the environment, you're putting your family's health at risk - and may be flushing thousands of dollars down the drain!

To learn about how Washington State's on-site sewage system (septic system) (OSS) program keeps people from getting sick and protects the environment, visit the Washington State Department of Health's On-Site Sewage System page. 

 

Do-It-Yourself Septic System Inspection Pt. 1

Septics 101- This educational video explains how on-site sewage systems (OSS) function and illustrates the steps you should take to keep your system working well. You can watch all 5 chapters in one video, or you can view one chapter at a time.

Do-It-Yourself Septic System Inspection Pt. 2

The Septics 201 video provides instructions for homeowners to inspect their own septic systems. Please contact Whitman County Public Health for certification requirements prior to inspecting your system. This educational video is broken into 9 chapters.  You can watch all 9 chapters in one video, or you can view one chapter at a time.

Additional information on-site sewage systems is available from Washington State University's Extension Office.  For additional information visit them online at http://ext.wsu.edu/, or http://www.whitman.wsu.edu/.  Visit the Whitman County Extension offices at:

WSU Cooperative Extension - Whitman County
310 North Main, Room 209
Whitman County Public Service Building

Second Floor
Colfax, WA  99111

Phone: 509-397-6290
Fax: 509-397-6256


 Washington State Department of Health's website has additional information on managing on-site wastewater systems.  The Wastewater Management Program is designed to:

  • Protect public health by promoting the safe treatment and disposal of domestic and other non-industrial wastewater in areas of Washington not served by municipal sewage treatment works.

  • Provide assistance to local health jurisdictions regarding on-site wastewater issues.

  • Review and approve plans for large on-site sewage systems.

DOH Logo linking to the DOH Home Page

For questions, please contact the Wastewater Management Program at wastewatermgmt@doh.wa.gov, or call 360-236-3062.


Home*A*Syst begins with checklist questions to identify problem areas:

 

*How safe is your drinking water?

*Do you use and store household hazardous products safely?

*Is there lead-based paint in your home?

 

When you find potential concerns, Home*A*Syst can help you develop an action plan to reduce the risks.

 

By examining daily routines in and around the home, we can all learn to better protect our health and the quality of the environment. Home*A*Syst is a good place to start!

 


The Environmental Protection Agency (EPA) announces a new and improved website on septic systems for  homeowners, state and local governments, and industry professionals.                              

Septic systems treat and disperse relatively small volumes of wastewater from individual or small numbers of homes and commercial buildings. Septic system regulation is usually a state, tribal, and local responsibility. EPA provides information to homeowners and assistance to state and local governments to improve the management of septic systems to prevent failures that could harm human health and water quality.


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