U. S. Army Corps of Engineers Materials Testing Center (USACE-MTC Certified)

American State Highway Transportation Officials (AASHTO R-18 Accredited)

AASHTO Materials Reference Laboratory (AMRL Inspected for Soils and Aggregates)

Concrete and Cement Reference Laboratory
(CCRL Inspected for Aggregates, Concrete, Cement and Reinforcing Steel)

United State Department of Agriculture (Inspected and Certified to Import Foreign Soil Permit)

California Department of State Architects (DSA - LEA Laboratory Certification) PENDING