Lab Accreditations


OMI, Inc. has a full-service AASHTO-accredited lab capable of handling your testing needs.  We are accredited for the following tests under the AMRL and CCRL programs.

ASTM D421, Dry Preparation of Soil Samples
ASTM D422, Particle Size Analysis of Soils
ASTM D698, Moisture Density Relationships using Standard Effort
ASTM D854, Specific Gravity of Soils
ASTM D1140, Soil Particles Smaller than #200
ASTM D1557, Moisture Density Relationships using Modified Effort
ASTM D2216, Moisture Content of Soil and Rock by Mass
ASTM D3740, Minimum Agency Requirements for Agencies Engaged in Testing
ASTM D4318, Liquid Limit, Plastic Limit, and the Plasticity Index of Soils
ASTM D6938, Field Compaction of Soils Using Nuclear Methods

ASTM C117, Aggregate Particles Smaller than #200
ASTM C127, Specific Gravity of Coarse Aggregate
ASTM C128, Specific Gravity of Fine Aggregate
ASTM C136, Sieve Analysis of Aggregates
ASTM C566, Evaporable Moisture Content of Aggregate by Drying
ASTM C702, Aggregate Sample Size Reduction

ASTM C31, Making and Curing Concrete Test Cylinders
ASTM C39, Compressive Strength of Concrete Test Cylinders
ASTM C138, Unit Weight and Air Content of Fresh Concrete, Volumetric Method
ASTM C143, Slump of Fresh Concrete
ASTM C172, Sampling Fresh Concrete
ASTM C231, Air Content of Fresh Concrete, Pressure Method
ASTM C617, Capping Concrete Test Cylinders
ASTM C1064, Temperature of Fresh Concrete
ASTM C1231, Compressive Strength of Concrete Test Cylinders using Unbonded Caps

Listed below is just a sample of our Asphalt, Soil, Concrete, and Aggregate testing.  All non-accredited tests by OMI, Inc. are performed by referencing their respective ASTM procedures which are kept up-to-date in our inventory.

Atterberg Limits, Sieve Analysis, Wash #200’s, Specific Gravity of Soils, Unit Weights, Proctors, Consolidations w/ or w/o Backpressure, California Bearing Ratio, Shear Testing, Permiability, Organic Impurities, Compressive Strength and Moisture, Gradations, Floor Flatness, Rebar Location Investigations, Concrete Core Sampling, Asphalt Core Sampling