Assessment and cleanup of contaminated industrial sites, leaking undergrounds storage tanks, and dry cleaners are projects service stations are some of the extensive experience of Mark Yinger Associates.   Mark Yinger Associates is known to perform these services to the satisfaction of Oregon DEQ at the lowest cost to land owners.   We achieve No Further Action status from the DEQ, removing a property's environmental liability.
  • Leaky Underground and Above Ground Storage Tank Sites throughout Oregon and Washington

Mark Yinger Associates has, since 1994, investigated, cleaned up, monitored, and closed leaky tank sites throughout Oregon and Washington.  These projects include service stations, bulk petroleum plants, city and county fuel tanks, and drycleaners.

  • Northwest Aluminum Co. Phase I & II Environmental Site Assessments, The Dalles, Oregon

In preparation for putting on the market six large parcels of land surrounding the aluminum smelter in The Dalles, Mark Yinger Associates conducted Phase I Environmental Assessments of each parcel. The proposed land use change in some sections would be from industrial to residential.  A Phase II assessment of discharge channels that cross two of the parcels of land was conducted. For many years contaminated effluent from the aluminum plant and sludge ponds flowed through two natural channels and one constructed channel to a discharge point on the Columbia River.  

  • Old Sunshine Flour Mill Phase I & II Environmental Assessments, The Dalles, Oregon

This project involved a Phase I Environmental Assessment of a large six-story flourmill, grain elevators, and warehouse.  A number of environmental concerns were identified and recommendations for Phase II investigation were made.  A Phase II assessment was conducted to determine if pesticides, solvents, and petroleum used at the site and nearby had impacted soil, groundwater, and the materials of the structures.  The Phase II Assessment also included surveys for lead based paints and asbestos.   

  • Cardinal Glass IG / Hanel Mill Site Redevelopment - Expedited Phase I, II, & III, Hood River, Oregon

Cardinal Glass IG purchased a portion of an inactive and partially dismantled saw mill and orchard to develop an insulated glass manufacturing plant.  Mark Yinger Associates performed expedited Phase I and Phase II Environmental Site Assessments and managed the highly expedited Phase III cleanup of herbicides, pesticides and petroleum contamination.  Phase I began in April 2003.  By June 23, 2003, the cleanup was completed.  The Cardinal Glass development was able to proceed on schedule.  A No Further Action letter was issued by the DEQ in March 2004.  

  • Landfill Consultant for Klamath, Crook, Hood River, and Lake Counties

Mark Yinger Associates has been providing landfill monitoring and remediation consulting services in central and eastern Oregon since 1999. Groundwater, leachate, and landfill gas monitoring is performed quarterly and semiannually to demonstrate that these county landfills are in compliance with all applicable state and federal environmental standards.  Corrective actions are designed and implemented when the monitored results exceed regulated values.

  • Industrial Metal Coating Facility, Tigard, Oregon

An industrial metal coatings facility was issued a consent order by the Oregon DEQ, requiring a Focused Remedial Investigation (FRI) of soil and groundwater, and human and ecological risks assessments (RA).  Mark Yinger Associates was hired to perform the FRI and RA focused on pesticides, pentachlorophenol (PCP), dioxins, petroleum and metals.  The groundwater contaminant plume extended offsite.  Offsite wetlands were also impacted by contaminated surface water runoff and sediments.  A conditional No Further Action and certificate of completion letter were issued by the DEQ in April 2007.  Restrictions on use of groundwater were filed by the DEQ with Clackamas County in 2007.

  • Three Sawmills in John Day and Mt. Vernon, Oregon

Phase I and II Environmental Assessments were performed at three large sawmill sites in John Day and Mt. Vernon, Oregon.   Potential contaminants included petroleum, chlorinated solvents, dioxin, fungicide, and metals.   Soil and groundwater sample results were used in conjunction with site conceptual models to evaluate potential human and ecological risks.

  • American Pine Products, Prineville, Oregon

Mark Yinger evaluated the potential that shallow groundwater in northern Prineville contaminated with pentachlorophenol and petroleum could impact a deeper aquifer used as a drinking water source for the City. This evaluation involved developing a detailed understanding of the area hydrogeology and a comprehensive review of current and historic pumping of the shallow and deep aquifers. The work also involved the review of years of work performed by other consultants.  The site was issued a conditional no further action letter by the DEQ.

  • Historic Sawmill Site, Bates, Oregon, for Grant Count, Oregon

This project involved a focused Phase II Environmental Assessment of a very large sawmill at the historic site of Bates, Oregon.  Because no structures remained the field investigations were largely based on interviews with former employees, residents, and review of historical photographs.  Soil and groundwater samples were collected at identified locations and tested for petroleum, volatile and semi-volatile organic compounds, polynuclear aromatic hydrocarbons, polychlorinated biphenyls (PCBs), metals, and fungicides.  Analytical results were compared to EPA and DEQ risk-based screening levels.  County personnel and equipment were used to minimize cost to Grant County. This site has subsequently been developed as an Oregon State Park.

  • Klamath County Road Department Primary Facility, Klamath Falls, Oregon

This project involved Phase I and II Environmental Assessments of Klamath County’s primary Road Department facility.  Years earlier large leaky underground fuel storage tanks had been removed and a soil cleanup by excavation conducted.  This work had not adequately characterized remaining soil and groundwater contamination.  The soil and groundwater contamination that remained under buildings and offsite was characterized.  A site conceptual model was developed to the assess risks posed by remaining contaminants.  The site was closed with institutional controls to restrict the use of groundwater.

  • Altamont/Crosby Road Project, for Klamath County, Oregon

Phase I and II Environmental Assessments were conducted in preparation for a four mile road and utility improvement project in the City of Klamath Falls, Oregon.  A significant area of subsurface gasoline and diesel contamination in the right-of-way was defined. A plan and cost estimate was developed to deal with contaminated soil and groundwater that would need to be removed during construction.  Construction observation and guidance services were provided during the construction of new buried utilities and a new road bed.