Facility Site ID: 501 Cleanup Site ID: 3402

Site Background

Snipes Mountain Landfill
Snipes Mountain Landfill
The Snipes Mountain Landfill began operation in 1968. Yakima County began operating the facility in 1972 as a municipal solid waste disposal site. The landfill was permitted under chapter 173-304 of the Washington Administrative Code by the Yakima Health District (YHD) and was closed in 1994. The landfill is unlined. The site also included unlined septage lagoons which were closed in 1991 and a waste transfer facility that was closed in 2022.

Volatile organic compounds (VOCs) were detected in groundwater at the facility in 1989. Tetrachloroethene (PCE) and trichloroethene (TCE) have been routinely detected in three monitoring wells and an off-site domestic well since 1989. PCE has been detected in groundwater at concentrations exceeding groundwater quality standards under the Model Toxics Control Act (MTCA).
Legal 2
Document Title Document Date Document Type
Snipes Mountain Landfill - Final PLP Letter 2/10/2023 Final Potentially Liable Person Status Letter
Snipes Mountain Landfill - combined early notice and 30-day notice of potential liability 4/7/2021 Early Notice Letter
Public Information 4
Document Title Document Date Document Type
Snipes Mountain Landfill - Agreed Order Responsiveness Summary 2/2/2024 Responsiveness Summary
Snipes Mountain Landfill - Draft Agreed Order Fact Sheet - ES 1/1/2024 Fact Sheet\Public Notices
Snipes Mountain Landfill - Draft Agreed Order Fact Sheet 1/1/2024 Fact Sheet\Public Notices
Snipes Mountain Landfill - Draft Agreed Order Fact Sheet 12/1/2023 Fact Sheet\Public Notices
Technical Reports 3
Document Title Document Date Document Type
Snipes Mountain Landfill - Draft Agreed Order 11/17/2023 Site Specific Administrative Document - other (Administrative correspondence)
Snipes Mountain Landfill - Groundwater Monitoring Report 2022 4/1/2023 Groundwater Monitoring Report
Snipes Mountain Landfill - Groundwater Monitoring Report 2021 4/1/2022 Groundwater Monitoring Report
There may be more documents related to this site. To obtain documents not available electronically, you will need to make a public records request.

Places to see print documents

  • Industrial Section
    300 Desmond Dr SE
    Lacey, 98503-1274
    Please schedule an appointment to view print documents at this location.
  • Solid Waste Program - Central Region
    1250 W Alder St
    Union Gap, 98903
    This location may only have print documents available during open comment periods.

Contaminants 1

Contaminant Type
Soil
Groundwater
Surface Water
Air
Sediment
Bedrock
Halogenated Organics - Halogenated Organics C C
S
Suspected
C
Confirmed Above Cleanup Levels
B
Below Cleanup Levels
RA
Remediated-Above
RB
Remediated-Below
R
Remediated
This contaminant list was based on our best information at the time it was entered. It may not reflect current conditions at the site.