Environmental Consulting & Water Resources in Oregon & Washington. 

   Welcome to Mark Yinger Associates. We are an environmental consulting firm.  We are experts in environmental assessment and contamination cleanup. Water resource assessment and development is another aspect of our environmental consulting in Oregon and Washington.  

  We perform assessment and cleanup of contaminated sites.  We also aid clients in preserving the environmental quality of both soil and water.  Amidst mounting public concern over environmental degradation and climate change, Mark Yinger Associates employs many methods of environmental assessments in our practice of environmental consulting in Oregon and Washington.  

      Environmental consulting in Oregon and Washington is often compliance consulting where Mark Yinger Associates ensures that our clients maintain appropriate compliance with state and federal environmental regulations.  We help our clients steer clear of possible fines, legal actions, or misguided transactions based on our thorough knowledge of environmental regulations.

 Mark Yinger is our principal hydrologist.  He performs boots-on-the-ground reconnaissance as well as literature research to develop  his understanding of the geology that determines the groundwater quantity and quality in many areas of Oregon and Washington.  Mark Yinger Associates have helped our water provider clients understand, protect and develop water resources for their communities.  Mark Yinger Associates has also helped clients work to protect surface and groundwater resources to minimize environmental degradation.  Many irrigators have had very productive wells sited by Mark Yinger.

    Phase I environmental site assessments are a facet of Mark Yinger Associates environmental consulting in Oregon.  Phase I environmental site assessments benefit both our clients and society as a whole.  Due to Phase I Environmental Site Assessments prior to purchase of a property, our clients don't purchase properties that are contaminated or have recognized environmental conditions.  Owners of contaminated sites clean them up so they will no longer have recognized environmental conditions preventing the sale of their property.  And, citizens gain lower exposure to contaminants in soil and water because the environment is cleaner.

    What we do…

Water Resource Consulting:

  • Hydrogeologic studies protecting wells, springs, creeks, rivers, and watersheds
  • Well site selection, well design, construction monitoring, and testing
  • Local and regional groundwater monitoring
  • Wetlands delineations
  • Groundwater quality assessments and monitoring

Environmental Consulting:

  • Phase I and II Environmental Site Assessments
  • Risk-based Assessments and Corrective Actions 
  • Petroleum Spill Cleanups of Soil and Water
  • RCRA & CERCLA Investigation and Corrective Action
  • Project Management – Hazardous Substances Release Sites
  • Landfill Monitoring and Regulatory Compliance


Where we do environmental consulting around Oregon & Washington...


Environmental & Water Resource Consulting Oregon & Washington   Eastern Oregon / Eastern Washington 

    Central Oregon 

    Western Oregon 

    Portland / Vancouver Metro Areas 

Hood River - White Salmon – Klickitat - Skamania - Goldendale - Bend  - Redmond - Sisters - Grants Pass - Coos Bay - Salem - Corvallis - Medford - Grants Pass - Roseburg - Ashland - Baker City - Burns - Madras - Pendleton - Enterprise - Hines - Milton Freewater - Lapine - North Bend - Astoria - Bingen - Eugene - Springfield – Bellingham - Tumwater - Seattle - Yakima - Roseburg - Vancouver - The Dalles - Longview - Coos Bay -  Stevenson - Walla Walla - State Line - Hermiston - McMinnville - Island City - Kelso - John Day - Ontario - Klamath Falls - Lakeview - Seaside - Ontario - Madras – Dallesport – Walla Walla – Cottage Grove – Gresham – Hermiston – Central Point – Lake Oswego - Snowdon – West Bonneville – Cascade Locks -  Carson – Arlington – Boardman – Umatilla –- Richland – Yakima – Husum – Snowdon – Wheeler – Reedsport – Bayview – Riddle - Milwaukie - Veneta - Wapato - Prinevelle - Tualatin