Pozzolan Products Company (P.P.C.) dba Utah Pozzolan Products Company dba Garco Testing Laboratories
Salinas,
California
View Accreditation Certificate
Steve
Derpich
721 Work Street
Salinas
,
California
93901
Phone: (831) 750 -02936
Fax:
steven.derpich@gcinc.com
http://www.graniteconstruction.com
Quality Management System - accredited since 10/29/2013
R18, D3666 (Aggregate), D3666 (Asphalt Mixture)
Asphalt Mixture - accredited since 10/29/2013
R30, R35, R47, R68, T30, T166, T209, T245, T269, T275, T283, T308, T312, T329, T355, D979, D2041, D2726, D2950, D3203, D3549, D3665, D4867, D5444, D6307, D6925, D6926, D6927
Soil - accredited since 11/21/2016
R58, T89, T90, T99, T180, T265, T310, D421, D698, D1557, D2216, D4318, D4718, D6938
Aggregate - accredited since 10/29/2013
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, C535, C566, C702, C1252, D75, D546, D2419, D3744, D4791, D5821
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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