Quality, Service & Commitment


  • 19 Sep 2018

    INTERRA Selected As Finalist To Receive The 2018 Illinois Sustainability Award

  • 08 May 2018

    IRTBA Announces INTERRA President To Serve On Green Council Board Of Directors

  • 28 Apr 2018


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Laboratory Certifications

  • IL & WI State DOTs
  • ASTM


Firm Certifications

  • DBE with IDOT
  • MBE with City of Chicago

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LPV111, New Orleans East Back Levee, Louisiana: “Given the accelerated schedule requirements of this project both the testing lab & field staff were more than capable and willing to go the extra mile to ensure all manners of testing specifications …

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O’Hare International Airport, Terminal 6, Chicago, IL

INTERRA Services

 Environmental site assessment and characterization

  Inspection and assessment of hazardous materials in buildings to be demolished

  Development of protocols, site health and safety plan

  Environmental subsurface investigation

  Soil and groundwater sampling, quantitative analysis and TACO evaluation

  Estimation of disposal volumes

  Recommendation for sampling, management and disposal of impacted soils and hazardous building materials

Project Summary

As part of the development team selected for the expansion of O’Hare International Airport, one of the world’s largest and busiest, INTERRA performed a Phase I and Phase II Environmental Site Assessment of a 100-acre parcel for the airport’s proposed new international terminal.

Phase I work included a review of available government records, aerial photographs, topographic maps, and interviews with local government officials and owners of existing buildings.  Once the review was complete, INTERRA prepared protocols for an environmental subsurface investigation and assessment. Phase II work involved drilling and sampling over 100 environmental borings, quarterly sampling of seven groundwater monitoring wells, an inspection for hazardous building materials such as mercury, asbestos and freon, a comparison of analytical data to the State of Illinois’ Tiered Approach to Corrective Action Objectives (TACO), the delineation of contaminated areas, and recommendations for cost-effective site remediation to keep the project moving ahead.

INTERRA’s work was successfully completed within an extremely tight schedule to accommodate client and City of Chicago project deadline requirements.