WDP & Associates Consulting Engineers, Inc.
Manassas,
Virginia
View Accreditation Certificate
Elizabeth
Peters
10621 Gateway Blvd., Suite 200
Manassas
,
Virginia
20110
Phone: (571) 543-9697
Fax:
EPeters@wdpa.com
http://www.wdpa.com
Quality Management System - accredited since 11/20/2012
R18, C1077 (Concrete), D3740 (Soil), E329 (Concrete), E329 (Soil), E329 (Sprayed Fire-Resistive Material)
Asphalt Mixture - accredited since 5/26/2026
T355, D2950
Soil - accredited since 11/20/2012
T310, D421, D422, D698, D854, D1556, D1557, D1883, D2216, D2487, D2488, D4318, D4972, D6938
Sprayed Fire-Resistive Material - accredited since 11/20/2012
E605, E736
Concrete - accredited since 10/16/2019
C31 (Cylinders), C39, C42 (Drilling Cores of Concrete), C42 (Testing Drilled Cores of Concrete), C138, C143, C172, C173, C231, C511, C617 (8000 psi and below), C1064, C1231 (7000 psi and below), C1542
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 10/27/2026. Please visit https://aashtoresource.org for current accreditation status.
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