Vactor Waste Decant Facility

Vactor Buildings 3

Hours of Operation

Rate and Fees

Monday thru Friday: 7 a.m. to 5 p.m.

Closed - New Year’s Day, Thanksgiving Day, and Christmas Day.

About the Facility 

Solid and liquids = $326 per load

Liquids only = $315 per load

Water fee = $20 each fill up - up to 1,000 gallons

Late payment fee = 1% of balance

Insufficient funds charge  = $35.00

The Snohomish County Vactor Waste Decant Facility is a self-service station designed to process, treat, and dispose of stormwater materials from customers throughout Western Washington. The primary components of the facility consist of a decant basin, sumps, oil/water separator, drying bins, and material storage area. The facility has concrete surfaces and drainage designs that allow for directing potentially contaminated runoff to a Wastewater Pretreatment Facility on site and is graded to avoid excess run-on from the surrounding area and direct uncontaminated runoff to stormwater treatment ponds. The Snohomish County Vactor Waste Decant Facility is located in the Cathcart area of Snohomish County.

Snohomish County Vactor Waste Decant Facility

8915 Cathcart Way

Snohomish, WA 98296


Acceptance Policy

Customers will be held accountable for any misuse of the facility and unacceptable materials disposed at the facility as well as the company or agency the user represents. Drivers are responsible for the materials being disposed of at the facility and will be held accountable for delivery of prohibited materials. Customers who dispose of prohibited materials at the facility will be responsible for the cost of cleaning the station, sewer line, and receiving treatment plant facilities and any other accrued expenses related to cleaning the station.


  • Stormwater drainage system solids and liquids
  • Decant liquids.

Special Permission Required

  • Stormwater and/or water treatment system (filters, filter media, etc.)
  • High volume loads

Strictly Prohibited

  • Dangerous/ Hazardous/ Industrial wastes 
  • Suspected or obvious contaminated materials
  • Sanitary sewer systems or septic systems
  • Drilling slurry/ Concrete slurries
  • Material from car wash vaults/ Vehicle wash using detergents.
  • Material from grease traps
  • Material from electrical vaults


Customers may only use vehicles that have the ability to discharge liquids and solids separately or have a total capacity for liquids not exceeding 5,000 gallons. Please notify us of anticipated high volumes.


Snohomish County reserves the right to deny entry to any public agency or private company for inappropriate discharge of prohibited wastes. Any public agency or private company caught delivering prohibited wastes will have their authorization to use the station revoked.

All materials must meet the acceptable chemical thresholds set forth in WAC 173-303. Customers disposing materials that require special permission without prior approval may have their authorization to use the facility revoked immediately. For materials that require special permission, customers will be required to submit chemical analytics demonstrating that it falls within the County's chemical thresholds.


Authorization to use the Vactor Waste Decant Facility will be given to any new vendor or governmental agency that completes all aspects of the Solid Waste Division authorization process and is approved by Snohomish County. To gain access to the facility, new customers will need to complete the following steps:

Step 1: Snohomish County Credit Account 

If you have not already done so, you will need to open a credit account with Snohomish County. This can be done by completing and submitting a Snohomish County Credit Account Request Form. Customers must complete this application for credit with Snohomish County Department of Finance, including appropriate bonding to become a part of the automated billing system prior to access being granted. Please note that Snohomish County Department of Finance cannot approve a new customer until they have been provided the original, stamped surety bond. To ensure a timely approval be sure to include this with your credit application.

Note: Vactor transactions may only be created for Solid Waste account customers in good stand­ing. You may not post charges to an account of which you or your employer is not registered to through the standard County account applica­tion process.

Step 2:Material Testing

Once you have been informed that your account is approved, you will need to provide chemical analytics on the material you plan on disposing. Testing can be done at any Washington State Department of Ecology Accredited Environmental Laboratories. Local laboratories include, but not limited to:

Everett Environmental Laboratory

4027 4th Street SE

Everett, WA 98205

(425) 257-8230

Analytical Resources, Incorporated

4611 S 134th Place

Tukwila, WA 98168-3240

(206) 695-6232

Edge Analytical, Incorporated

1620 S Walnut Street

Burlington, WA 98233

(800) 755-9295

AmTest Laboratories

13600 NE 126th Place, Suite C

Kirkland, WA 98034

(425) 885-1664

Fremont Analytical, Inc.

3600 Fremont Ave N

Seattle, WA 98103

(206) 352-3790

This list is not an endorsement of these labs. Customers are advised to contact the laboratory prior to sending off a sample to ensure that can provide a complete test.

Test results must have ALL the following parameters included. Incomplete tests will be rejected.

Required Analytics 11.30.20

The chemical analytics will be reviewed by Solid Waste Division staff. Customers will be notified on whether they are approved to dispose within five (5) days of submitting tests. Additional testing may be required depending on the material being disposed.

Step 3: User Agreement

Customers whose materials are approved then read, sign, and return the Solid Waste Division Waste Decant Facility User Agreement.

Step 4: Vehicle Authorization

Approved customers must complete a Vehicle Authorization Form along with a Statement of Authorization on company letterhead with the contact information of the designated person(s) authorized to use the account. Both authorization forms must be provided at least one (1) working day prior to use of a site.


All four steps MUST be completed in order to gain access to the Solid Waste Division Waste Decant Facility. Incomplete applications, forms, and tests will be rejected.

Additional Information

For more information about our rates or credit process, please contact us at any time at, or call (425) 388‐7647.

For more information about our acceptance policy, please contact Michael Smith at or call (425) 388-7519.