Despiau Associates Corp. (DAC) operates a construction materials testing laboratory under the pertinent quality controls and assurances.  To provide adequate quality assurance from the pre-design stages to project completion, we also provide quality control testing and inspection services during grading and construction operations. Behind every field technician the support of professional engineers are available to provide timely on-site solutions to construction problems if they arise.  Our professional engineers and laboratory technicians are certified under the Nuclear Regulatory Commission and American Concrete Institute. 

The Laboratory and Field Technical Services provided by DAC include:

     - Plasticity Indices
     - Unconfined Compression Tests
     - Triaxial Tests
     - Consolidation Tests
     - Hydrometer Analysis
     - Sieve Analysis
     - Permeability Tests
     - Grain Size Analysis
     - Organic Content
     - Soils Classification
     - Non-destructive Testing and Evaluations.
     - Laboratory Compaction (Standard and Modified Proctor Tests)
     - On-site Earth-fill Construction Supervision.
          - Site Grading Control
          - Prof-Rolling Inspection
          - Compaction Testing Services
               - Monitoring by Nuclear Gauge
     - On-site Concrete Construction Inspection.
     - On-site Pile Load Test Supervision.
     - On-site Grouting Inspection and Control.
     - Mix Designs and Reviews
     - Field Testing of Fresh Concrete, Air Content, Unit Weight and Slump
     - Compressive Strength of Concrete Specimen Cured in Lab
     - Lab and Field CBR Tests