Columbia West’s nationally accredited in-house construction materials and soil mechanics laboratory provides analytical testing and analyses of soil, aggregate, asphalt, concrete, grout, and other construction materials. Columbia West is also a licensed provider of nuclear gauge field compaction testing services in Oregon and Washington. Columbia West is accredited to ISO/IEC 17025 by the American Association for Laboratory Accreditation (A2LA) for the following tests: (Certification Number 2922.01)