Twining, Inc.
Sacramento,
California
View Accreditation Certificate
Christian
Masse
120 Main Avenue
Sacramento
,
California
95838
Phone: (916) 649-9000
Fax:
cmasse@twininginc.com
http://www.twininginc.com
Quality Management System - accredited since 12/7/2009
R18, C1077 (Aggregate), C1077 (Concrete), D3666 (Aggregate), D3666 (Asphalt Mixture), D3740 (Soil), E329 (Aggregate), E329 (Asphalt Mixture), E329 (Concrete), E329 (Soil), E329 (Sprayed Fire-Resistive Material)
Asphalt Mixture - accredited since 12/7/2009
R30, R47, R68, R97, T30, T166, T209, T245, T246, T247, T269, T275, T283, T308, T312, T329, T355, D979, D1560 (Stability), D1561, D2041, D2726, D2950, D3203, D3549, D3665, D4867, D5444, D6307, D6925, D6926, D6927
Soil - accredited since 5/27/2010
R58, T89, T90, T99, T180, T190, T191, T265, T267, T310, D421, D698, D1140, D1556, D1557, D2216, D2487, D2488, D2844, D2974, D4318, D4643, D4718, D4829, D6913, D6938
Aggregate - accredited since 12/7/2009
R76, R90, T11, T19, T21, T27, T84, T85, T96, T104, T112, T176, T210, T255, T304, T335, C29, C40, C88, C117, C127, C128, C131, C136, C142, C535, C566, C702, C1252, D75, D2419, D3744, D4791, D5821
Sprayed Fire-Resistive Material - accredited since 3/1/2024
E605, E736
Concrete - accredited since 2/2/2010
M201, R39, R60, R100 (Beams), R100 (Cylinders), T22, T24 (Testing Drilled Cores of Concrete), T97, T119, T121, T152, T160, T196, T231 (12000 psi and below), T309, C31 (Beams), C31 (Cylinders), C39, C42 (Testing Drilled Cores of Concrete), C78, C138, C143, C157, C172, C173, C192, C231, C511, C617 (12000 psi and below), C1064, C1231 (7000 psi and below), C1542
Masonry - accredited since 2/20/2025
C426 (Linear Drying Shrinkage of Concrete Masonry Units)
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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