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SERVICES     Geotechnical Services     Construction Materials     Engineering            > Projects     Pavement Engineering     and Management     Environmental Services HVJ tests, evaluates, and monitors construction materials and procedures. Our services are conducted either on-site or at our laboratory facilities in Houston, Austin, Dallas, or El Paso, staffed with certified technicians. Technician certifications include the National Institute for Certification in Engineering Technologies (NICET), the American Concrete Institute (AO), and the TxDot Hot Mix Paving Association. We assist in all phases of a job — design, materials selection, specification review, and construction. Typically, we: Evaluate aggregate Design, inspect, and test concrete mixtures Test bituminous materials Test and inspect soil compaction and stabilization Inspect steel fabrication and erecting Qualify welders and their procedures Inspect foundation excavations and installation procedures   Ensuring Materials Specifications Are Met