Yeh and Associates, Inc.
Denver,
Colorado
View Accreditation Certificate
Mustapha
Aichiouene
2000 Clay Street
Suite 200
Denver
,
Colorado
80211
Phone: (303) 781-9590
Fax: (303) 781-9583
mus@yeh-eng.com
http://www.yeh-eng.com
26-4523 : Accreditation has been suspended for Asphalt Mixture standard(s) CP-L 5106
Quality Management System - accredited since 6/27/2003
R18, C1077 (Aggregate), C1077 (Concrete), D3666 (Asphalt Mixture), D3740 (Soil), E329 (Aggregate), E329 (Asphalt Mixture), E329 (Concrete), E329 (Soil)
Asphalt Mixture - accredited since 6/28/2003
T30, T166, T209, T269, T283, T308, T329, CP-L 5115, D2041, D2726, D3203, D3549, D4867, D5444, D6307
Soil - accredited since 6/27/2003
R58, T89, T90, T99, T180, T190, T193, T208, T265, T288, T289, T290 (Method B), T310, D421, D698, D1140, D1557, D1883, D2166, D2216, D2487, D2488, D2844, D4318, D4546, D6938
Aggregate - accredited since 6/27/2003
R76, T11, T21, T27, T84, T85, T96, T176, T255, C40, C117, C127, C128, C131, C136, C535, C566, C702, D2419
Concrete - accredited since 10/6/2003
C31 (Beams), C31 (Cylinders), C39, C78, C138, C143, C172, C173, C231, C511, C1064, C1231 (7000 psi and below)
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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