Frequently Asked Questions



Standard’s laboratories in Oklahoma hold accreditation and/or validation by the AASHTO (American Association of State Highway and Transportation Officials) Accreditation Program (AAP) and the U.S. Army Corps of Engineers’ validation program.

Standard Testing’s Oklahoma City office maintains current AAP accreditation in asphalt mixture, soils, aggregate, sprayed fire-resistive material, and concrete testing.  Our Oklahoma City laboratory has AAP accreditation for ASTM C1077 (Aggregate), D3666 (Concrete), D3666 (Aggregate), D3666 (Asphalt Mixture), D3740 (Soils), and E329, “Specifications for Agencies Engaged in the Testing and/or Inspection of Materials Used in Construction,” for Aggregate, Asphalt Mixture, Concrete, Sprayed Fire-Resistive Material, and Soil.  Additionally, Standard Testing and Engineering Company is currently accredited by AAP for 50 different ASTM soil testing standards and 112 other testing standards (162 total testing standards).

Turn around time?

Proctors and soil classifications: As fast as 48 hours from sample delivery.

Drilling: 3-5 days from the NTP.

CTB and Soil-Cement Durability Testing (Freeze-Thaw testing requires 7 weeks and Wet-Dry testing requires 5 weeks)

Rush turnaround on most testing available for an extra fee.

I need an estimate!

We can provide estimates for geotechnical exploration and construction materials testing and inspection within a 1-day turnaround.

No matter the type or size of your project, we will be able to help you and guide you the right direction.



We request dispatch requests be placed at least 24-hours in advance in order to accommodate your needs on the project.

Depending on the office location you are trying to reach, our LOCATIONS page provide the phone numbers to call in order to place a dispatch.

Where to Deliver Samples?

OKC Office Sample Delivery

Lawton Office Sample Delivery

Enid Office Sample Delivery

Links To Our Accreditations

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