Geotechnical Engineering, Environmental Services, Material Testing, & Construction Management Nationwide Service

• Toledo, Ohio
  419-324-2222
• Plymouth, Michigan
  734-455-8600
• Cleveland, Ohio
  216-357-2335
• Chicago, Illinois
  312-771-2539
• Baltimore/Wash. D.C.
  800-684-1177

TTL Accreditations & Affiliations

• American Association of Laboratory Accreditation (A2LA)
• Associated General Contractors (AGC)
• American Concrete Institute (ACI)
• International Council of Shopping Centers (ICSC)
• American Consulting Engineers Council (ACEC)
• International Facility Management Association (IFMA)
• American Council of Independent Laboratories (ACIL)
• Michigan Association of Environmental Professionals (MAEP)
• American Industrial Hygiene Association (AIHA)
• Michigan Society of Professional Engineers (MSPE)
• American Institute of Professional Geologists (AIPG)
• National Brownfi eld Association (NBA)
• American Society of Civil Engineers (ASCE)
• National Voluntary Laboratory Accreditation Program (NVLAP)
• American Society of Highway Engineers (ASHE)
• Ohio Roofi ng Contractors Association (ORCA)
• American Society of Testing and Materials (ASTM)
• US Green Building Council (USGBC)
• American Assoc of State Hwy & Trans Officials (AASHTO)
• U.S. Army Corps of Engineers Validated (USACOE)
• American Council of Governmental Industrial Hygienists (ACGIH)
• American Society of Safety Engineers (ASSE)
• Washington Metropolitan Area Construction Safety Association (WMACSA)