Quality, Service & Commitment

INTERRA NEWS

  • 08 May 2018

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

  • 28 Apr 2018

    INTERRA AWARDED IDOT PTB 187, ITEM 4 PROJECT

  • 08 Dec 2017

    INTERRA Honored With 2017 IRTBA Green Industry Achievement Award For Green Initiatives

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Certified

Laboratory Certifications

  • IL & WI State DOTs
  • ASTM
  • AASHTO
  • USACE

 

Firm Certifications

  • DBE with IDOT
  • MBE with City of Chicago

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Testimonials

You have skilled people, a superior laboratory facility with all the equipment in excellent condition and an outstanding QC/QA program. Your certified tranined staff was knowledgeable, courteous and proactive…

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North Shore Sanitary District Landfill, Zion IL

INTERRA Services

Construction Quality Assurance (CQA) Services, including:

 Laboratory testing services

  Field density testing

√  Construction monitoring

  System evaluation

Project Summary

INTERRA provided comprehensive Construction Quality Assurance (CQA) Services to the North Shore Sanitary District during construction of its Zion Landfill in Zion, IL. Specifically, under a tight construction schedule, INTERRA provided laboratory services for the construction of approximately 4 acres of landfill cell, 4 acres of leachate holding pond, 10 acres of landfill final cover, and a pad pond.  Field density testing of the clay liner and nondestructive testing of the synthetic liner was performed.

With significant coordination required during construction, INTERRA’s fast-track laboratory services included flexwall permeability, soil index, and proctor tests.  Field services encompassed construction monitoring of the test pad, clay liner placement, synthetic placement, protective geotextile placement, drainage material placement, surveying, and pressure testing of leachate pipes. INTERRA was also retained to complete a system evaluation of leachate extraction and submersible pump station pumps.