Enviromental Technologies Group


Western United States


Investigation/Remediation Services
TOC Holdings Co.
California, Oregon, and Washington

Since 2005 ETG personnel have been contracted by TOC Holdings Co. (TOC), previously known as Time Oil Co., to provide site remediation services at TOC facilities in California, Oregon, and Washington.  ETG personnel have been responsible for developing and implementing investigation and remediation programs for TOC facilities.  The scope of work has included: oversight, sample collection, and reporting for underground storage tank (UST) decommissioning, development and implementation of groundwater monitoring programs, air quality monitoring, soil gas investigations, negotiations with regulatory agencies, litigation support, and remedial actions that have included soil vapor extraction, in-situ bioremediation, soil excavation, groundwater extraction and treatment, air sparging, engineering and institutional controls, and risk-based corrective actions.  Since 2005, ETG personnel have been successful in closing 9 of the 14 assigned sites.

Soil and Groundwater Investigation and Remediation
Hostess Brands
Glendale, California

In 2002 Hostess Brands requested ETG personnel evaluate the on-going investigation and cleanup of diesel releases at a large bakery facility in Glendale, California.  Previous actions by several environmental consultants had resulted in the installation of a free-phase petroleum and groundwater recovery system at the site boundaries and on an adjacent site.  Following a steady reduction in free-phase petroleum through the late 1990s, free-phase petroleum had suddenly increased to significant levels in 2000.

The initial actions were to evaluate the performance of the current treatment system, prepare geologic cross-sections to evaluate fate and transport of the releases, and review previous soil and groundwater assessment reports.  Based on the evaluation, several changes were proposed to the groundwater treatment system to improve operation reliability and performance.  Those actions included: addition of several new free-phase product recovery wells, replacement of the groundwater treatment system’s granular activated carbon vessels, installation of six additional pneumatic free-phase petroleum recovery pumps, addition of 23 passive free-phase petroleum recovery devices, and implementation of a systematic operation and maintenance program for the system.  ETG personnel also directed the installation of five borings and three monitoring wells to complete delineation of the dissolved contaminant plume north of the site.

The initial actions at the site resulted in a significant increase in free-phase petroleum recovery, a reduction in system down-time, a reduction in groundwater monitoring costs, and a dramatically improved relationship with the site regulatory agency.

Additional services at the site included implementation of an in-situ enhanced bioremediation pilot test to treat diesel contaminated soils, assistance in closure of a previously unidentified UST, and preparation of a Geographic Information System (GIS) map for subsurface geology to assist in investigation and remedial actions.



Chlorinated Solvent Soil and Groundwater Investigation and Remediation
engineering-environmental Management (e2M)
Milwaukie, Oregon

In January 2005, ETG personnel were contracted by e2M to provide environmental services for an active manufacturing facility located in Milwaukie, Oregon.  The client, Warn Industries, Inc. (Warn) had recently been purchased by Dover Resources and the new owner determined that a more aggressive approach to remediate on-site and off-site chlorinated volatile organic compounds (VOCs) was warranted.  The initial task was the transfer of the site from a Consent Order to a Voluntary Cleanup Program (VCP).  ETG personnel provided technical support for Warn’s legal counsel during the process.  Additional contracted services included the following: preparation and submittal of a 9-month in-situ bioremediation feasibility study work plan that included bromide tracer evaluation, preparation and submittal of an in-situ SVE feasibility study work plan, and evaluation of the previous flow and transport model.  Following transfer of the site to VCP, ETG personnel completed the following: implementation of both feasibility studies; slug testing on 25 site wells; a soil gas survey for SVE system design; designed, installed, and operated (for 6 months) a SVE system; performed annual groundwater monitoring and reporting; completed annual indoor sampling, and initiated negotiations with the Oregon Department of Environmental Quality (DEQ) for site-specific cleanup levels.  ETG is currently providing annual groundwater monitoring and reporting, completing implementation of an expanded bioremediation program that has been successful in reducing source area contaminants by 90%, and is negotiating closure of the site with the DEQ.

Soil and Groundwater Investigation and Remediation
Merritt W. Truax
Canby, Oregon

ETG personnel were contracted by Merritt W. Truax to investigate and cleanup a 4,800 gallon gasoline release from an UST in Canby, Oregon.  Initial assessment conducted at the site included the installation of eight monitoring wells within the station property boundary.  Two of the monitoring wells (MW-1 and MW-4) were incorporated into an interim SVE system to remove separate phase gasoline identified on site groundwater and treat source area soils.

Initial operation of the SVE system included abatement of the discharge air with a thermal oxidation unit.  Following submittal of risk evaluation data and review by DEQ staff, the thermal oxidation unit was removed from the system and the SVE system began free discharge to the atmosphere.  A full-scale remediation system consisting of soil vapor extraction and air sparging later became operational.  The prior risk evaluation was able to present risk evaluation data that resulted in abatement equipment not being required on the full-scale system.  This action resulted in a significant (>$100,000) cost savings for the client.

Soil and Groundwater Investigation and Remediation
Confidential Client
Klamath Falls, Oregon

ETG has been contracted by a former petroleum distributor in Klamath Falls, Oregon to characterize and remediate two separate surface releases of unleaded gasoline.  The scope of work includes recovery of free-phase gasoline, preparation of work plans for free-phase gasoline recovery and the installation of groundwater monitoring wells, quarterly groundwater monitoring and development of an in-situ bioremediation program following removal of free-phase gasoline.  ETG has implemented an initial product recovery program, installed a groundwater monitoring well network, and is performing a groundwater monitoring program.  Additional services have included litigation support and completion of a preliminary risk assessment and remedial investigation report for the site.

Brownfields Environmental Services
City of Oakridge
Oakridge, Oregon

ETG personnel were contracted by the City of Oakridge to provide environmental services for completing the closure of outstanding environmental issues at the Oakridge Industrial Park.  The industrial park is a Brownfields site that operated as a former sawmill.  The City of Oakridge is working with the DEQ to remediate and develop the site on a lot by lot basis.  Cleanup activities have resulted in NFA letters for 23 of the 31 lots.  The scope of work included completing Phase I ESAs for three lots, completion of a preliminary Human Health and Ecological Risk Assessment (HHRA) for the facility, completion of a subsurface investigation using ground penetrating radar (GPR), and wetland classification for site cooling water and log ponds.  In June 2007, ETG personnel were selected to complete: additional wetland assessment, further ecological assessment to complete the HHRA, and, if necessary, permit closure of the former cooling ponds.  ETG is currently implementing remedial actions under an American Recovery and Reinvestment Act (ARRA) grant for remedial activities at the site.




UST Closure Assessment and Monitoring Well Installation
Washington Department of Ecology
Port Orchard, Washington

ETG performed a UST system closure assessment at the Country Junction Store site in Port Orchard, Washington, in February 2010.  The site is a documented LUST facility, with soil and groundwater impacts exceeding regulatory cleanup levels.  A soil excavation and in-situ treatment program funded through the American Recovery and Reinvestment Act of 2009 was performed at the site in February and March 2010.  In addition to the UST system closure assessment (tanks, dispensers, and product line removals and subsequent compliance sampling), ETG oversaw the removal, installation, and development of four groundwater monitoring wells, and the installation and subsequent decommissioning of five groundwater reinjection wells at the site.  ETG prepared a UST System Closure Report documenting the UST system removal and compliance sampling results, and an Interim Action Report documenting the soil removal, dewatering, in-situ soil treatment, and excavation soil sampling work.

Characterization and Remediation of Hydrocarbon Contaminated Soils in Dry Wells
Interstate Brands Corporation

Spokane, Washington

ETG personnel successfully completed the remediation of petroleum contaminated soils at a former IBC bakery facility in Spokane, Washington.  The site consisted of a retail bakery thrift store, a former bakery, and vehicle maintenance shop.  Storm drain drywells and a drywell for the vehicle maintenance shop floor drains had resulted in the release of diesel and oil range petroleum hydrocarbons to site soils.  Previous site work had included the removal of contaminated sludge from the floor drain drywell and removal of site USTs.  The scope of work for the project included the following:

  • Reviewed existing assessment data and identified data gaps
  • Constructed groundwater monitoring wells to assess groundwater quality
  • Excavated soils in excess of Washington Department of Ecology Model Toxics Control Act (MTCA) Method A cleanup levels
  • Prepared a summary report for remedial actions

Following a review of existing assessment data, four groundwater monitoring wells were completed at the site.  Four quarters of groundwater monitoring indicated groundwater was compliant with Ecology MTCA Method A cleanup goals.  To remediate soil located beneath the storm drain drywells and residual contaminates in the floor drain drywell.  ETG personnel directed the removal of approximately 150 cubic yards of petroleum contaminated soil.

Soil Assessment and Remediation, Water Storage Tank Facility
RH2 Engineering
Edmonds, Washington

Shallow soil mixed with sand blast grit discovered during site excavation work at a water pumping station in May 2009 contained 2,400 to 2,500 mg/kg total lead.  ETG personnel prepared a sampling and analysis plan and conducted an initial assessment to determine the extent of lead in soil using a Thermo Scientific Niton X ray fluorescence (XRF) analyzer.  Lead concentrations exceeding MTCA Method A were found in soil at 0.3 to 1 foot below grade around a 1.5 million gallon steel aboveground reservoir tank.  A work plan for excavating and removing lead-impacted soil was prepared and implemented in September 2009.  A small area of lead-impacted soil in a tree-lined buffer zone was remediated using a vacuum truck to avoid damaging the tree roots.  Soil exceeding the MTCA Method A cleanup level was disposed of at a licensed landfill.  The project was completed ahead of schedule and within budget, allowing the facility upgrade work to continue with minimal disruption.  Ecology and the Snohomish Health District granted site closure.

Soil and Groundwater Assessment and Remediation
TOC Holdings Co.
Olympia, Washington

ETG provided soil and groundwater investigation and remediation services for a former service station.  Services included: SVE design testing; delineation of soil and groundwater contamination; indoor air quality sampling; groundwater monitoring; UST decommissioning oversight; design of a soil and groundwater remediation system; remedial system installation oversight; and remedial system operations and maintenance.  Services also included technical support for litigation related to third party impacts from the release, and preparation and implementation of a remedial action plan to treat soil beneath an adjacent property building.  The remedial action included: soil removal, installation of horizontal piping for active and passive SVE and in-situ bioremediation, and installation of a sub-slab vapor barrier in the adjacent building basement.  Project permitting required: completion of an air quality discharge permit for a catalytic/thermal oxidizer, building permits, sanitary sewer discharge permits, and completion of State Environmental Policy Act (SEPA) permit.

Brownfields Environmental Services
Washington Department of Consumer Trade and Economic Development
Aberdeen, Washington

ETG personnel were contracted by the Washington Department of Consumer Trade and Economic Development (CTED) to provide environmental services for completing Phase I ESAs for the Aberdeen Redevelopment Project.  The Aberdeen Redevelopment Project included the development of retail, commercial office, and high density residential housing centered on a remodeled Hotel Morck.  The objective of the redevelopment project was to improve economic conditions in the City of Aberdeen.  The Phase I ESA project encompassed over two city blocks, and was completed in a brief 40-day period.  ETG personnel were again selected by CTED to complete the Phase II ESA/ABCA portion of the project.  The Phase II ESA/Assessment of Brownfield Cleanup Alternatives (ABCA) included former fueling stations, existing LUST sites, and other commercial properties.


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