Granite Rock Company
Aromas,
California
View Accreditation Certificate
Douglas
Lemon
1900 Quarry Rd
RTS Laboratory
Aromas
,
California
95004
Phone: (831) 768-2394
Fax:
dlemon@graniterock.com
http://www.graniterock.com
Quality Management System - accredited since 9/1/2000
R18, C1077 (Aggregate), C1077 (Concrete), D3666 (Aggregate), D3666 (Asphalt Mixture)
Asphalt Mixture - accredited since 9/1/2000
R30, R35, R47, R68, R97, R121, T30, T164, T166, T209, T245, T246, T247, T269, T275, T283, T308, T312, T324, T329, D979, D1560 (Stability), D1561, D2041, D2172, D2726, D3203, D3549, D4867, D5444, D6307, D6925, D6926, D6927, D8225
Aggregate - accredited since 9/1/2000
R76, R90, T11, T19, T21, T27, T37, T84, T85, T96, T100 (Mineral Filler), T112, T176, T210, T255, T304, T335, C29, C40, C117, C127, C128, C131, C136, C142, C566, C702, C1252, D75, D546, D2419, D3744, D4791, D5821
Concrete - accredited since 11/18/2003
M201, R39, R60, R100 (Cylinders), T22, T119, T121, T152, T196, T231 (8000 psi and below), T309, C31 (Cylinders), C39, C138, C143, C172, C173, C192, C231, C511, C617 (8000 psi and below), 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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