Go East Corp Landfill
4330 108th St SE, Everett, WA 98208

Go East Corp Landfill Construction Kick off Meeting
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WHAT'S NEW?

PACE Engineers has initiated site grading and landfill closure construction at the Go East Corp. Landfill site. Representatives from Ecology, Snohomish Health District, and Snohomish County Planning and Development Services attended a pre-construction conference meeting on March 29, 2021.


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SITE LOCATION

The Site is generally located at 4330 108th Street SE, Everett, Washington. The Site is located in unincorporated Snohomish County within the Silver Lake neighborhood south of Everett.


Tree stumps from the landfill fire
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SITE HISTORY

The 40.9-acre Property sits atop the Vashon advance outwash sand formation, which outcrops where steep slopes are present on the east side of the Property. The Vashon advance outwash sand formation is underlain by low-permeability silt deposits referred to as the pre-Vashon lacustrine silt unit. The pre-Vashon lacustrine silt unit is estimated to be at least 110 feet thick beneath the Property.

In 1969, a conditional use permit was issued for sand excavation. Sand was excavated from a ravine on the northern part of the Property and used as construction fill for nearby construction projects. 

Rekoway, Inc. purchased the Property on February 1, 1972 and operated the landfill until 1980. Rekoway obtained a 10-year conditional-use permit from Snohomish County on March 8, 1972 to excavate sand and gravel and to operate a landfill by reclaiming the excavation area with solid waste. The permit authorized the disposal of “wood, mineral, and concrete solid materials, but not garbage or putrescibles.” In 1974-75, Rekoway was approved to accept “tires and bulk packaging material such as cardboard, pallets, large parcel wrappings, shredded paper, and warehousing waste material.” 

In 1974, Rekoway accepted approximately 200 cubic yards of baghouse dust containing magnesium, phosphate, and aluminum dust into the landfill. A fire resulted from the oxidation of the buried metal dusts. The material was excavated, spread on the ground, and extinguished, and thereafter covered with soil. Partially burned trees and stumps caused a landfill fire in November 1976 that persisted through 1979. Snohomish Health District suspended the landfill permit in November 1977.

Go East Corporation conditionally purchased the Property in 1979 and requested reinstatement of the landfill permit to allow additional filling to level the landfill area for future development. Snohomish Health District issued a permit to operate a wood waste landfill on November 2, 1979. The permit expired on September 18, 1982. Go East Corporation stopped accepting waste in the summer of 1983 when Snohomish County issued a stop work order. Another landfill fire began in October 1983 and burned out by January 1986.

Snohomish Health District prepared a Site Hazard Assessment under the Model Toxics Control Act (MTCA) on May 14, 2004. The assessment recommended that the future residential development of the Property include and implement a landfill closure plan as proposed in 1999. Subsequently, Snohomish Health District issued a No Further Action letter on June 1, 2004 with confirmation from Ecology.

P&GE acquired the Property from Go East Corporation in May 2009.

Ecology prepared an initial investigation field report on June 13, 2019 based on available information. The report indicates that metals (commonly associated with anaerobic reducing conditions) were detected at concentrations exceeding MTCA cleanup levels in three groundwater samples collected from monitoring wells in 2009. The report also indicates that elevated concentrations of metals were detected in surface water samples collected from a stream that originates at the base of the landfill’s northeastern slope. Additionally, the report refers to the alleged observation of partially buried drums by a third party, although this finding has not been confirmed by follow-up investigations. Based on information presented in the initial investigation field report, Ecology rescinded the 2004 No Further Action letter on June 18, 2019 and issued an Early Notice Letter on September 9, 2019. The Site is listed on Ecology’s Confirmed and Suspected Contaminated Sites List.


LANDFILL WASTE CHARACTERIZATION

The landfill permit requires P&GE to collect soil samples from the wedge area (aka, interim action area) to characterize the waste prior to construction. P&GE excavated test pits within the wedge area in June 2019 and collected soil samples in accordance with the landfill closure plan. Although concentrations of oil-range petroleum hydrocarbons and polycyclic aromatic hydrocarbons exceeded MTCA soil cleanup levels in some samples, the concentrations do not preclude disposal of waste from the wedge area into the final landfill boundary.

Pursuant to the Interim Action Work Plan, P&GE collected 12 supplemental waste characterization soil samples, 10 onsite fill source soil samples, and one former storage tank area sample on June 29-30, 2020. Based on community feedback, Tim O’Connor, with Ecology, oversaw the sampling activities performed by P&GE’s contractors.

 

·     Supplemental waste characterization soil samples were collected from areas that exhibited the highest concentrations of contaminants in June 2019, and the samples were submitted for laboratory analysis of a full-suite of analytical parameters. The June 2020 sampling results were consistent with the June 2019 sampling results. The samples contained heavy oil range hydrocarbons and polycyclic aromatic hydrocarbons (PAHs), which is consistent with the asphaltic material, roof tar, treated wood, and charred material observed in the test pits. In his subsequent review the June 2020 NWTPH-Dx chromatograms, OnSite Environmental’s principal chemist stated it’s entirely possible that the high lube oil results are associated manufactured asphalt. Gasoline and diesel range petroleum hydrocarbons were not detected, and volatile organic compounds (VOCs), semivolatile organic compounds (SVOCs) (excluding PAHs), polychlorinated biphenyls (PCBs), herbicides, and pesticides were detected at sporadic, trace level concentrations near their detection limits. The concentrations of metals were too low to warrant additional leachate testing for dangerous waste characterization assessment. The waste characterization sampling results do not preclude the consolidation of the waste in the landfill. The landfill material does not meet the definition of contaminated soil in WAC 173-350-100.

 

·     No hazardous substances were detected in the onsite fill source samples, other than naturally occurring metals at concentrations below the stringent interim action levels for soil.

 

·     The former storage tank area was located and evaluated for evidence of contamination. Diesel and oil range hydrocarbons were detected at concentrations below the interim action level in the soil sample collected from this area.

 

·    Currently, no contaminated soils have been identified beyond the existing landfill boundary. The Interim Action Work Plan requires additional testing to identify potential contaminated soils beyond the final landfill boundary. P&GE will collect confirmation soil samples from the native soil beneath the excavated portions of the landfill and will be observing, field testing, and performing contingent soil sampling beyond the existing landfill boundary. P&GE plans to remove any encountered contaminated soils and dispose of them offsite at an authorized facility.


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LANDFILL CLOSURE AND DEVELOPMENT PLANS

P&GE plans to redevelop the Property by consolidating and closing the landfill, and then developing the 97-parcel Bakerview Plat Subdivision on portions of the property that are beyond the final landfill boundary. The landfill closure plan includes:

·           Reducing the landfill area from 9.6 acres to 6.8 acres by excavating the wedge area and any associated contaminated soil, and then consolidating the waste within the final landfill boundary.

·           Collecting soil samples from the wedge area to characterize the waste prior to construction.

·           Constructing an engineered landfill cap, stormwater facilities, and a perimeter landfill gas control trench within the final landfill boundary.

P&GE will then subdivide the Property, construct a roadway, and provide infrastructure for 97 new residential parcels.  The final landfill area will be accessible to the general public.


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AGENCIES WORKING TOGETHER

Snohomish Health District

Snohomish Health District issued a landfill permit for the closure of the Go East Corp Landfill in accordance with Chapter 173-350-400 of the Washington Administrative Code. The Health District’s approval of the Go East Landfill Closure Plan was affirmed by the state Pollution Control Hearings Board. Ecology supports the Health District but is not the regulatory agency for the landfill permit. Snohomish County Planning and Development Services

Snohomish County Planning and Development Services 
Snohomish County Planning and Development Services issued a land disturbing activity permit for the initial rough grading (including landfill closure activities), and will issue a second land disturbing activity permit for plat development.

Washington State Department of Ecology

Ecology grants Construction Stormwater General Permit from our Water Quality Program. Ecology is the lead regulatory agency for overseeing cleanup of the site under the Model Toxics Control Act


FLICKER

Ecology created a flicker account  were we will post pictures of the cleanup activities.


SITE DOCUMENTS

View Electronic Documents in the right-hand column. Click for instructions on how to submit a public records request.


Ecology is committed to providing people with disabilities access to information and services by meeting or exceeding the requirements of the Americans with Disabilities Act (ADA), Section 504 and 508 of the Rehabilitation Act, and Washington State Policy #188. To request an ADA accommodation, contact Ecology by phone at 360-407-6831
 or email at ecyadacoordinator@ecy.wa.gov. For Washington Relay Service or TTY call 711 or 877-833-6341 .  Visit Ecology’s website for more information.

Check out 
What’s In My Neighborhood to find out about other cleanups in your area.


 

Map showing site location as Snohomish County, WA SITE INFORMATION

Map

View Electronic Documents

Cleanup Site Details Report

Facility Site ID: # 2708

Cleanup Site ID: 4294

Location:
Everett, Snohomish County

Status: Awaiting Cleanup   Get definitions of Status terminology

Contacts:
Alan Noell
Site Manager
(425) 213-4803

Tim O'Connor
Site Manager
425-389-2695

Coleman Miller
Information in Spanish
Información en español
(509) 406-5664

Nancy Lui
Public Involvement Coordinator
(425) 393-5679


Document Repositories:

Northwest Regional Office
3190 160th Ave SE
Bellevue, 98008-5452
(425)649-7190