About

Certified Testing Services, Inc.

About

Certified Testing Services, Inc provides geotechnical drilling, geotechnical engineering, construction material testing, aggregate inspections, and soil testing in the Sioux City and Storm Lake, IA, areas.

Year Established

1987

Products

• Geotechnical Engineering
• Construction Materials Testing

Services

• Concrete Testing
• EPS Expanded Polystyrene Fill Testing
• Fire Proofing Inspection
• Hot Mix Asphalt Testing
• Mineral Aggregates
• Portland Cement Testing
• Soil Testing

Specialties

• Construction Material Testing
• Geotechnical Drilling
• Geotechnical Engineering

Business Hours

Saturday and Sunday Hours By Appointment Only

Holiday Hours

• Monday, May 26, 2025 : Closed
• Thursday, June 19, 2025 : Closed
• Friday, July 4, 2025 : Closed
• Monday, September 1, 2025 : Closed
• Monday, October 13, 2025 : Closed
• Tuesday, November 11, 2025 : Closed
• Thursday, November 27, 2025 : Closed
• Thursday, December 25, 2025 : Closed

Associations

• ASTM
• ICC
• Home Builders Association
• Master Builder of Iowa
• Iowa DOT Certified
• Nebraska Department of Transportation

Brands

• N/A

Pickup and Delivery

• Pickup Not Offered
• Delivery Not Offered