Nationally recognized independent testing laboratory. Accredited by AASHTO and ISO 17025. US Army Corps of Engineers Validated. Complete construction materials and geotechnical testing laboratory, field services, engineering subsurface sampling and exploration services. Geological consulting services, including quality trouble shooting, reserves analyses, QA/QC training, core logging, freeze-thaw, and site evaluations. Members of ASTM, NSSGA, IMAA and 7 additional state aggregate associations. Celebrating 100 years in business, 1911-2011.