Koontz Bryant Johnson Williams, Inc.
North Chesterfield,
Virginia
View Accreditation Certificate
Brent E.
Johnson
7511 Whitepine Road
North Chesterfield
,
Virginia
23237
Phone: (804) 541-1436
Fax: (804) 541-1437
bjohnson@kbjwgroup.com
http://www.kbjwgroup.com
Quality Management System - accredited since 6/30/2016
R18, C1077 (Aggregate), C1077 (Concrete), D3740 (Soil), E329 (Aggregate), E329 (Concrete), E329 (Soil)
Soil - accredited since 6/30/2016
R58, T88, T89, T90, T99, T180, T193, T265, T310, D421, D422, D698, D1140, D1557, D1883, D2216, D2487, D2488, D4318, D4643, D6938
Aggregate - accredited since 6/30/2016
C29, C40, C117, C127, C128, C136, C566, C702, D75
Concrete - accredited since 6/30/2016
C31 (Beams), C31 (Cylinders), C39, C78, C138, C143, C172, C173, C231, C511, C617 (7000 psi and below), C1064, C1231 (7000 psi and below)
Masonry - accredited since 8/14/2025
C511 (Moist Cabinets, Moist Rooms, and Water Storage Tanks Used in the testing of Hydraulic Cements and Concretes)
C780 (Annex 1) (Preconstruction and Construction Evaluation of Mortars for Plain and Reinforced Unit Masonry - Consistency by Cone Penetration)
C780 (Annex 6 - Cubes) (Preconstruction and Construction Evaluation of Mortars for Plain and Reinforced Unit Masonry - Compressive Strength of Cubes)
C1019 (Sampling and Testing Grout)
Please note that our accreditations do not include an expiration date. An accreditation only expires when the laboratory fails to comply with our accreditation requirements.
* This information is only valid as of 8/11/2026. Please visit https://aashtoresource.org for current accreditation status.
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